College of Agriculture,Food and Environment Sciences, Department of Food Science and Human Wellness
川端庸平 カワバタ ヨウヘイ
E-Mail：
Website：http://kaken.nii.ac.jp/ja/r/50347267Last Update :2025/06/09Researcher Profile and Settings
Name
KAWABATA Youhei
Affiliation (Master)
College of Agriculture,Food and Environment Sciences, Department of Food Science and Human Wellness
Affiliation & Job
Rakuno Gakuen University Department of Food Science and Human Wellness, College of Agriculture, Food and Environment Sciences
Research Activities
Research Areas
Nanotechnology/Materials, Basic physical chemistry Natural sciences, Bio-, chemical, and soft-matter physics
Research Interests
界面活性剤, 相転移, ダイナミクス, 構造形成過程, 構造解析, ラメラ液晶, 中性子スピンエコー法, 中性子・X線小角散乱法, ベシクル, ネットワーク構造, クラフト転移, リオトロピック液晶, 自己集合構造, 構造形成要因, 水和固体相, 共焦点顕微鏡, 圧力, 相分離構造, 散乱実験, 界面活性剤水溶液, 中性子小角散乱, X線小角散乱, 小角光散乱, 秩序系, レオロジー, 流動場, 光散乱, ラメラ相, リオトロピック相, ずり流動場,
Published Papers
Role of sugar and sugar alcohols in the wet-curing process of unheated meat products in Japan, Kensuke YAJIMA; Youhei KAWABATA; Yasuhiro HASEGAWA; Naoyuki MAEDA; Tomohito IWASAKI, Nihon Chikusan Gakkaiho, Japanese Society of Animal Science, 94, (4) 433 - 440, 2023 11 25 Change in foam characteristics due to heat treatment during meringue preparation, Soshin ISHIKAWA, Youhei KAWABATA and Isamu KANEDA, 2023 10 Stopped-flow/SAXS Observation of Vesicle Formation Process in Dichain Cationic Surfactant Aqueous Solutions, Youhei Kawabata; Kento Hayashi; Sachiko Masaoka, SPring-8/SACLA利用研究成果集, 9, (5) 266 - 269, 2021 08 Comparison of characteristics of single-walled carbon nanotubes obtained by super-growth CVD and improved-arc discharge methods pertaining to interfacial film formation and nanohybridization with polymers, Ahmed A. Almarasy; Takuto Hayasaki; Yoshinori Abiko; Youhei Kawabata; Shuichi Akasaka; Atsuhiro Fujimori, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 615, 2021 04 Polypseudorotaxane-based supramolecular hydrogels consisting of cyclodextrins and Pluronics as stabilizing agents for antibody drugs, Naoko Ohshita; Keiichi Motoyama; Daisuke Iohara; Fumitoshi Hirayama; Toru Taharabaru; Naoki Watabe; Youhei Kawabata; Risako Onodera; Taishi Higashi, Carbohydrate Polymers, 256, 2021 03 15 Characterization of Molecular Arrangement of Long-chain Ferrocenyl Derivatives Having Asymmetric Carbon by Method of Organized Molecular Films and Formation of Its Helical Nanofibers, Yusuke Kimura; Yuki Mashiyama; Haruka Maruyama; Youhei Kawabata; Tatsuro Kijima; Atsuhiro Fujimori, ChemistrySelect, 6, (9) 2198 - 2209, 2021 03 05 Formation, Structure, and Function of Hydrogenated and Fluorinated Long-Chain Phosphonate-Modified Single-Walled Carbon Nanotubes with Bidentate Bonds, Yoshinori Abiko; Takuto Hayasaki; Shuhei Hirayama; Ahmed A. Almarasy; Youhei Kawabata; Atsuhiro Fujimori, ChemistrySelect, 5, (22) 6594 - 6607, 2020 06 16 Effect of supported MAO cocatalysts in ethylene polymerization and ethylene/1-hexene copolymerization using Cp*TiCl2 (O-2,6-iPr2 C6 H3 ) catalyst, Palawat Unruean; Wannida Apisuk; Youhei Kawabata; Toru Murayama; Boonyarach Kitiyanan; Kotohiro Nomura, Molecular Catalysis, 475, 2019 10 Effect of the Crystallization Process of Surfactant Bilayer Lamellar Structures on the Elongation of High-Aspect-Ratio Gold Nanorods, Takamichi Inaba; Yoshiko Takenaka; Youhei Kawabata; Tadashi Kato, Journal of Physical Chemistry B, 123, (22) 4776 - 4783, 2019 06 06 Self-assembly of sulfur-containing heterocyclic compounds constructed by thianthrene units and their sulfonium salts, Kazunori Hirabayashi; Kenki Ebine; Youhei Kawabata; Yoshihiro Yoshida; Toshio Shimizu, Heteroatom Chemistry, 29, (5-6) , 2018 12 Effect of interlamellar interactions on shear induced multilamellar vesicle formation, Y. Kawabata; R. Bradbury; S. Kugizaki; K. Weigandt; Y. B. Melnichenko; K. Sadakane; N. L. Yamada; H. Endo; M. Nagao; H. Seto, Journal of Chemical Physics, 147, (3) , 2017 07 21 Hydrophilic and hydrophobic tail effects on vesicle formation in a non-ionic surfactant aqueous solution below the Krafft temperature, Youhei Kawabata; Kana Ohmoto; Akira Murakami; Yuto Takahashi; Yousuke Yamauchi; Tadashi Kato, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 520, 779 - 787, 2017 05 05 Effects of Oscillatory Shear on the Orientation of the Inverse Bicontinuous Cubic Phase in a Nonionic Surfactant/Water System, Mutsumi Yamanoi; Youhei Kawabata; Tadashi Kato, Langmuir, 32, (12) 2863 - 2873, 2016 03 29 Rheological properties of wormlike micelles formed in concentrated region of nonionic surfactant (C16 E7 )-water system, Yuka Shimada; Youhei Kawabata; Tadashi Kato, Colloid and Polymer Science, 293, (11) 3275 - 3283, 2015 11 01 Pressure-Induced Transition of Bilayers in a Nonionic Surfactant Solution, Tetsuo Takano; Youhei Kawabata; Takuro Suzuki; Tadashi Kato, Journal of Physical Chemistry B, 119, (35) 11656 - 11663, 2015 09 03 Vesicle formations at critical vesicle concentration in a polyoxyethylene type nonionic surfactant system, Youhei Kawabata; Kunihiro Ichiguchi; Takahito Ando; Tadashi Kato, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 462, 179 - 185, 2014 11 01 Mesoscopic simulation of phase behaviors and structures in an amphiphile-solvent system, Kohtaro Yamada; Emiko Yasuno; Youhei Kawabata; Tohru Okuzono; Tadashi Kato, Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 89, (6) 062310 - 7pp, 2014 06 23 Electrolyte effect on lamellar domain morphology in a nonionic surfactant solution below the Krafft temperature, Youhei Kawabata; Akira Murakami; Tadashi Kato, Journal of Physical Chemistry B, 118, (4) 1022 - 1029, 2014 01 30 Bilayer structure of ester-amide-type cationic surfactants in a dilute aqueous solution, Youhei Kawabata; Kento Hayashi; Tomoki Kanao; Akira Ishikawa, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 441, 140 - 148, 2014 01 20 Effects of surfactant concentration on formation of high-aspect-ratio gold nanorods, Yoshiko Takenaka; Youhei Kawabata; Hiroyuki Kitahata; Masaru Yoshida; Yoko Matsuzawa; Takuya Ohzono, Journal of Colloid and Interface Science, 407, 265 - 272, 2013 10 01 Re-entrant lamellar/onion transition with varying temperature under shear flow, Daijiro Sato; Kahoru Obara; Youhei Kawabata; Makio Iwahashi; Tadashi Kato, Langmuir, 29, (1) 121 - 132, 2013 01 08 Microscopic investigation on morphologies of bilayer gel structure in the mixed polyoxyethylene-type nonionic surfactant systems, Yuko Nagai; Youhei Kawabata; Tadashi Kato, Journal of Physical Chemistry B, 116, (41) 12558 - 12566, 2012 10 18 3D structure of lamellar domains in a surfactant solution below the Krafft temperature, Youhei Kawabata; Hirohito Yashima; Tadashi Kato, Journal of Physical Chemistry B, 116, (5) 1593 - 1597, 2012 02 09 19aFN-3 Elongation mechanism of high-aspect-ratio gold nanorods, Takenaka Yoshiko; Kawabata Youhei; Kitahata Hiroyuki; Ohzono Takuya, Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 67.2.4, 2012 Control of the Long-axis Length of Gold Nanorods through Temperature Variation, Yoshiko Takenaka; Youhei Kawabata; Hiroyuki Kitahata; Takuya Ohzono, Chemistry Letters, 41, (10) 1173 - 1175, 2012 Transition processes from the lamellar to the onion state with increasing temperature under shear flow in a nonionic surfactant/water system studied by Rheo-SAXS, Makiko Ito; Yuriko Kosaka; Youhei Kawabata; Tadashi Kato, Langmuir, 27, (12) 7400 - 7409, 2011 06 21 Vesicle growth and deformation in a surfactant solution below the Krafft temperature, Youhei Kawabata; Tomoaki Shinoda; Tadashi Kato, Physical Chemistry Chemical Physics, 13, (8) 3484 - 3490, 2011 02 28 Worm-Like Micelles in a Binary Solution of Nonionic Surfactant C16 E7 and Water, Tadashi Kato; Yuka Shimada; Daisuke Nozu; Youhei Kawabata, Self-Organized Surfactant Structures, 145 - 160, 2010 11 26 Lamellar-to-onion transition with increasing temperature under shear flow in a nonionic surfactant/water system, Yuriko Kosaka; Makiko Ito; Youhei Kawabata; Tadashi Kato, Langmuir, 26, (6) 3835 - 3842, 2010 03 16 Detector area expansion at iNSE neutron spin echo spectrometer, N. L. Yamada; H. Endo; N. Osaka; Y. Kawabata; M. Nagao; T. Takeda; H. Seto; M. Shibayama, Physica B: Condensed Matter, 404, (17) 2607 - 2610, 2009 09 01 Formation process of bilayer gel structure in a nonionic surfactant solution, Youhei Kawabata; Akimi Matsuno; Tomoaki Shinoda; Tadashi Kato, Journal of Physical Chemistry B, 113, (17) 5686 - 5689, 2009 04 Micelle structures in aqueous solutions of glucose-based surfactants having an isoprenoid-type hydrophobic chain, Taiki Kato; Youhei Kawabata; Masatoshi Fujii; Tadashi Kato; Masakatsu Hato; Hiroyuki Minamikawa, Journal of Colloid and Interface Science, 312, (1) 122 - 129, 2007 08 01 Shear-induced structural transition in the lamellar phase of the C 16 E7 /D2 O system. Time evolution of small-angle neutron scattering at a constant shear rate, Kyoko Miyazaki; Yuriko Kosaka; Youhei Kawabata; Shigeyuki Komura; Tadashi Kato, Journal of Applied Crystallography, 40, (SUPPL. 1) , 2007 04 Hexagonally ordered nanostructures comprised of a flexible disk-like molecule with high self-assembling properties at neutral and cationic states, Masashi Hasegawa; Hideo Enozawa; Youhei Kawabata; Masahiko Iyoda, Journal of the American Chemical Society, 129, (11) 3072 - 3073, 2007 03 21 Detector Area Expansion at iNSE Neutron Spin Echo Spectrometer, Yamada N. L.; Nagao M.; Kawabata Y.; Takeda T.; Seto H.; Endo H.; Osaka N.; Shibayama M., hamon, The Japanese Society for Neutron Science, 17, (2) 132 - 135, 2007 Pressure effects on bending elasticities of surfactant monolayers in a ternary microemulsion composed of aerosol- OT D2 O /decane, Youhei Kawabata; Hideki Seto; Michihiro Nagao; Takayoshi Takeda, Journal of Chemical Physics, 127, (4) , 2007 Development of $π$ and $π$/2 flippers for a neutron spin echo spectrometer, Takeda Takayoshi; Yamada Norifumi L; Katou Katsuya; Nagao Michihiro; Seto Hideki; Kawabata Youhei; Takeda Masayasu; Torikai Naoya, Journal of Neutron Research, Taylor \& Francis, 15, (1) , 2007 Relocation and upgrade of neutron spin echo spectrometer, iNSE, Michihiro Nagao; Norifumi L. Yamada; Youhei Kawabata; Hideki Seto; Hideki Yoshizawa; Takayoshi Takeda, Physica B: Condensed Matter, Elsevier, 385-386, 1118 - 1121, 2006 11 15 Pressure-dependence of the bending modulus of surfactant monolayers in ternary microemulsion systems observed by neutron spin echo, H. Seto; M. Nagao; Y. Kawabata, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 284-285, 430 - 433, 2006 08 15 Pressure effect on semi-microscopic structures and dynamics in a nonionic surfactant microemulsion, Hideki Seto; Michihiro Nagao; Youhei Kawabata, AIP Conference Proceedings, 832, 303 - 306, 2006 05 05 SAXS, SANS and NSE studies on "unbound state" in DPPC/water/CaCl2 system, Norifumi L. Yamada; Hideki Seto; Takayoshi Takeda; Michihiro Nagao; Youhei Kawabata; Katsuaki Inoue, Journal of the Physical Society of Japan, The Physical Society of Japan, 74, (10) 2853 - 2859, 2005 10 Shear-induced structural transition in a lyotropic lamellar phase studied using small angle neutron and light scattering, T. Kato; K. Miyazaki; Y. Kawabata; S. Komura; M. Fujii; M. Imai, Journal of Physics Condensed Matter, 17, (31) , 2005 08 10 Shear-induced structural transition in the lamellar phase of nonionic surfactants, Tadashi Kato; Kyoko Miyazaki; Yuriko Kosaka; Youhei Kawabata, Polymer Preprints, Japan, 54, (2) 3982 - 3983, 2005 Small angle X-ray scattering from lamellar phase for β-3,7- dimethyloctylglucoside/water system: Comparison with β-n-alkylglucosides, Itaru Yamashita; Youhei Kawabata; Tadashi Kato; Masakatsu Hato; Hiroyuki Minamikawa, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 250, (1-3 SPEC. ISS.) 485 - 490, 2004 12 10 Anomalous decrease in lamellar spacing by shear flow in a nonionic surfactant/water system, Tadashi Kato; Koji Minewaki; Youhei Kawabata; Masayuki Imai; Yoshiaki Takahashi, Langmuir, 20, (9) 3504 - 3508, 2004 04 Neutron spin echo study on slow dynamics of lipid bilayers in the DPPC/D2 O/CaCl2 system, T. Takeda; N. L. Yamada; Y. Kawabata; H. Seto; M. Nagao, AIP Conference Proceedings, 708, 118 - 119, 2004 04 Anomalous change in lamellar spacing by shear flow in nonionic surfactant/water system, T. Kato; K. Minewaki; K. Miyazaki; Y. Kawabata; M. Imai, AIP Conference Proceedings, 708, 94 - 95, 2004 04 Temperature- and pressure-dependences of a bending modulus of surfactant monolayers in a ternary microemulsion composed of AOT / D2 O / decane, H. Seto; Y. Kawabata; M. Nagao; T. Takeda, AIP Conference Proceedings, 708, 120 - 121, 2004 04 Droplet density dependences of the static and dynamic structures in a ternary microemulsion system, M. Nagao; H. Seto; Y. Kawabata; M. Shibayama, AIP Conference Proceedings, 708, 92 - 93, 2004 04 Temperature and Pressure Effects on Thermal Fluctuations of Amphiphilic Monolayers, Kawabata Youhei; Nagao Michihiro; Seto Hideki; Takeda Takayoshi, hamon, The Japanese Society for Neutron Science, 14, (2) 134 - 138, 2004 Temperature and Pressure Effects on the Bending Modulus of Monolayers in a Ternary Microemulsion, Y. Kawabata; M. Nagao; H. Seto; S. Komura; T. Takeda; D. Schwahn; N. L. Yamada; H. Nobutou, Physical Review Letters, 92, (5) 4 - 561034, 2004 Effects of shear flow on structures of lamellar phase in a nonionic surfactant/water system, Tadashi Kato; Koji Minewaki; Kyoko Miyazaki; Youhei Kawabata; Toshiyuki Shikata; Shigeyuki Komura; Masatoshi Fujii, Progress in Colloid and Polymer Science, 129, 9 - 15, 2004 Temperature and Pressure Dependences of a Microemulsion System, SETO Hideki; NAGAO Michihiro; KAWABATA Youhei, Journal of Oil Chemists' Society, Japan, Japan Oil Chemists' Society, 3, (10) 511 - 522, 2003 10 01 Development of spin flippers with steady current for the TOF-NSE spectrometer, Takayoshi Takeda; Norifumi L. Yamada; Hideki Seto; Youhei Kawabata, Physica B: Condensed Matter, 335, (1-4) 211 - 214, 2003 07 Neutron spin echo studies of the effects of temperature and pressure in a ternary microemulsion, Y. Kawabata; M. Nagao; H. Seto; S. Komura; T. Takeda; D. Schwahn, Applied Physics A: Materials Science and Processing, 74, (SUPPL.I) , 2002 12 Slow dynamics of n-butoxyethanol-water mixture by neutron spin echo technique, K. Yoshida; T. Yamaguchi; M. Nagao; Y. Kawabata; H. Seto; T. Takeda, Applied Physics A: Materials Science and Processing, 74, (SUPPL.I) , 2002 12 Effect of proteins on dynamics of water-in-oil AOT microemulsions, M. Hirai; R. Kawai-Hirai; H. Iwase; T. Hayakawa; Y. Kawabata; T. Takeda, Applied Physics A: Materials Science and Processing, 74, (SUPPL.II) , 2002 12 Development of spin flippers with steady current for the TOF-NSE spectrometer at a pulsed spallation neutron source, T. Takeda; H. Seto; Y. Kawabata, Applied Physics A: Materials Science and Processing, 74, (SUPPL.I) , 2002 12 Neutron spin echo studies on poly(vinyl alcohol) gel in a mixture of dimethyl sulfoxide and water, T. Kanaya; N. Takahashi; K. Nishida; K. Kaji; H. Seto; M. Nagao; Y. Kawabata; T. Takeda, Journal of Neutron Research, 10, (3-4) 149 - 153, 2002 Temperature-and pressure-dependences of shape fluctuations in a ternary microemulsion system, Youhei Kawabata; Hideki Seto; Michihiro Nagao; Takayoshi Takeda, Journal of Neutron Research, 10, (3-4) 131 - 136, 2002 Effects of temperature and pressure on phase transitions in a ternary microemulsion system, M. Nagao; H. Seto; T. Takeda; Y. Kawabata, Journal of Chemical Physics, 115, (21) 10036 - 10044, 2001 12 01 Pressure-induced structural phase transition of dense droplet microemulsions studied by small-angle x-ray scattering, Hideki Seto; Michihiro Nagao; Youhei Kawabata; Takayoshi Takeda, Journal of Chemical Physics, 115, (20) 9496 - 9502, 2001 11 22 Hydrodynamic interactions in the structural fluctuation of a ternary amphiphilic system C12 E5 /water/n-octane, Shigehiro Komura; T. Takeda; Y. Kawabata; S. K. Ghosh; H. Seto; M. Nagao, European Physical Journal E, 5, (3) 329 - 336, 2001 06 Dynamical fluctuation of the mesoscopic structure in ternary C12 E5 -water-n-octane amphiphilic system, Shigehiro Komura; Takayoshi Takeda; Youhei Kawabata; Swapan K. Ghosh; Hideki Seto; Michihiro Nagao, Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 63, (4 I) 414021 - 4140210, 2001 04 Dynamical fluctuation of the mesoscopic structure in ternaryC12E5–water–n-octane amphiphilic system, Shigehiro Komura; Takayoshi Takeda; Youhei Kawabata; Swapan K. Ghosh; Hideki Seto; Michihiro Nagao, Physical Review E, American Physical Society (APS), 63, (4) , 2001 03 19 Neutron spin echo studies on effects of temperature and pressure in dynamics of a ternary microemulsion, Y. Kawabata; M. Nagao; H. Seto; T. Takeda, Studies in Surface Science and Catalysis, 132, 209 - 212, 2001 Pressure and temperature effects on the phase transition from a dense droplet to a lamellar structure in a ternary microemulsion, H Seto; D Okuhara; Y Kawabata; T Takeda; M Nagao; J Suzuki; H Kamikubo; Y Amemiya, JOURNAL OF CHEMICAL PHYSICS, 112, (23) 10608 - 10614, 2000 06 Temperature and pressure effects on structural formations in a ternary microemulsion, M. Nagao; H. Seto; Y. Kawabata; T. Takeda, Journal of Applied Crystallography, 33, (3 I) 653 - 656, 2000 Neutron spin echo study on the effects of temperature and pressure in a ternary complex fluid system, Y Kawabata; M Nagao; H Seto; T Takeda, STATISTICAL PHYSICS, 519, 193 - 195, 2000 Membrane undulations in complex fluids involving amphiphiles, T Takeda; Y Kawabata; H Seto; SK Ghosh; S Komura; M Nagao, STATISTICAL PHYSICS, 519, 190 - 192, 2000 Neutron spin–echo investigations of membrane undulations in complex fluids involving amphiphiles, T Takeda; Y Kawabata; H Seto; S Komura; S.K Ghosh; M Nagao; D Okuhara, Journal of Physics and Chemistry of Solids, Elsevier BV, 60, (8-9) 1375 - 1377, 1999 09 Collective motions of a network of wormlike micelles, H Seto; T Kato; M Monkenbusch; T Takeda; Y Kawabata; M Nagao; D Okuhara; M Imai; S Komura, JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 60, (8-9) 1371 - 1373, 1999 08 Improvement of neutron spin echo spectrometer at C2-2 of JRR3M, T. Takeda; H. Seto; Y. Kawabata; D. Okuhara; T. Krist; C. M.E. Zeyen; I. S. Anderson; P. Høghøj; M. Nagao; H. Yoshizawa; S. Komura; T. Ebisawa; S. Tasaki; M. Monkenbusch, Journal of Physics and Chemistry of Solids, Elsevier Science Ltd, 60, (8) 1599 - 1601, 1999 Neutron spin echo investigations on the slow dynamics in complex fluids involving amphiphiles, T. Takeda; Y. Kawabata; H. Seto; S. Komura; S. K. Ghosh; M. Nagao, AIP Conference Proceedings, AIP, 1999
Conference Activities & Talks
Interface structure of ovalbumin aqueous solution in merengue foams, Youhei Kawabata, International workshop for “Application of Quantum Beam to Food Science” 食品乳化物・泡の構造観察とその物性, 川端庸平, 食品ハイドロコロイドセミナー2024 オボアルブミンの表面偏析および水溶液中のナノ構造と泡沫安定性に関する考察, 山田 悟史; 三木 宏美; 高井 実花; 川端 庸平, 第75回コロイドおよび界面化学討論会 顕微鏡観察ならびに SAXS 測定を用いたココアの乳化構造観察, 高井 実花; 川端 庸平; 金田 勇, 第75回コロイドおよび界面化学討論会 ポリグリセリン脂肪酸エステル／グリセリン／エステル油 ３成分系における相挙動, 岡 真佐人; 児玉 敬; 藤原 聡頼; 川端 庸平, 第62回日本油化学会年会 顕微赤外分光ならびにSAXS測定を用いたココアの乳化構造観察, 高井 実花; 川端 庸平; 金田 勇, 第62回日本油化学会年会 温度上昇に伴うオボアルブミン表面吸着の 偏析状態およびバルク構造の変化, 三木宏美; 安部美季; 武仲能子; 川端庸平; 吉村倫一; 山田悟史, 第62回日本油化学会年会 Sucrose effects on interface and bulk structure of merengue, 川端庸平; 関美夕; 三木宏美; 武仲能子; 山田悟史; 高井実花; 金田勇, 第62回日本油化学会年会 中性子反射率法を用いたメレンゲ泡界面の表面剰余量評価, 山田 悟史; 高井 実花; 川端 庸平, 第74回コロイドおよび界面化学討論会 界面活性剤水溶液におけるリオトロピック液晶のオニオン/ベシクル構造形成, 川端庸平, 第74回コロイドおよび界面化学討論会 ココアの乳化物における油脂結晶成長と界面構造, 高井実花; 川端庸平; 金田勇, 第74回コロイドおよび界面化学討論会 メレンゲ作成時の熱処理による泡特性変化と界面構造, 川端庸平; 山田悟史; 高井実花; 金田勇, 日本油化学会第61回年会 ココアの乳化構造と物性の温度依存性, 高井実花; 川端庸平; 金田勇, 第46回バイオレオロジー学会 メレンゲ作成時の熱処理による泡特性変化, 川端庸平; 石川蒼心; 柴山万里; 金田勇, 第46回バイオレオロジー学会 Mechanical property and emulsion structure of ganache, Youhei Kawabata; Yurina Ohta; Isamu Kaneda, The 73rd Divisional Meeting of Division of Colloid and Surface Chemistry Structural analysis of food collods - application of microscopic Raman to foods -, Youhei Kawabata, 第261回 物質科学セミナー 食品ハイドロコロイドのラマンイメージング, 川端 庸平, 食品ハイドロコロイドセミナー2021 顕微ラマンを用いたソフトマターのイメージング, 川端 庸平, 令和３年度日本顕微鏡学会北海道支部学術講演会
Misc
Structures of Intermediate Region between Lamellar and Onion Phases in a Nonionic Surfactant (C14E5)/Water System, SUZUKI Kento; KAWABATA Youhei; KATO Tadashi, KEK Progress Report (Web), 2018 Simultaneous Measurements of Rheology/Small-Angle Light Scattering on the Lamellar Phase of a Nonionic Surfactant and Re-Entrant Lamellar/Onion Transition with Varying Temperature, SUZUKI Kento; KAWABATA Youhei; KATO Tadashi, 日本化学会春季年会講演予稿集(CD-ROM), 97th, 2017 Lamellar/Onion Intermediate Structure Formed in Low Shear Rate Region in a Nonionic Surfactant (C14E5)/Water System, SUZUKI Kento; KAWABATA Youhei; KATO Tadashi, KEK Progress Report (Web), 2017 Orientation Control of Inverse Bicontinuous Cubic Phase by using Shear Alone: Effects of Strain Amplitude of “MAOS” and Replacement of LAOS by Steady Flow., KIRA Natsume; KAWABATA Youhei; KATO Tadashi, KEK Progress Report (Web), 2017 24pCJ-4 Current status of neutron focusing mirror and VIN ROSE at BL06 at J-PARC/MLF, Hino M.; Oda T.; Endo H.; Yamada N. L.; Yamagata Y.; Seto H.; Kawabata Y., Meeting Abstracts of the Physical Society of Japan, 70, (0) 2805 - 2805, 2015 , 10.11316/jpsgaiyo.70.1.0_2805 21pAK-6 Lamellar-onion-lamellar transition with varying temperature under shear flow, Sato Daijiro; Kawabata Youhei; Kato Tadashi, Meeting abstracts of the Physical Society of Japan, 67, (2) 353 - 353, 2012 08 24 23aPS-95 Hierarchic structure induced by the solvation effect in water and organic solvent with salt, Sadakane K.; Nagao M.; Endo H.; Osaka N.; Kawabata Y.; Seto H., Meeting abstracts of the Physical Society of Japan, 65, (1) 400 - 400, 2010 03 01 23aPS-109 Mesophases in mixtures of amphiphile and solvent, Yamada Kohtaro; Kawabata Youhei; Kato Tadashi, Meeting abstracts of the Physical Society of Japan, 65, (1) 404 - 404, 2010 03 01 Neutron spin echo studies on dynamical structures of microemulsion, 川端 庸平; 長尾 道弘, Hamon, 20, (1) 80 - 83, 2010 01 27pVB-5 Lamellar/onion phase transition processes in a nonionic surfactant/water system, Ito Makiko; Kawabata Youhei; Kato Tadashi, Meeting abstracts of the Physical Society of Japan, 64, (1) 358 - 358, 2009 03 03 High-pressure SANS and NSE experiments in microemulsion systems, Michihiro Nagao; Youhei Kawabata; Hideki Seto, Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu, 19, (1) 52 - 61, 2009 , 10.4131/jshpreview.19.52 21pRL-8 Structure and Rheology of gel phase in a nonionic surfactant solution, Kawabata Y.; Matsuno A.; Kato T., Meeting abstracts of the Physical Society of Japan, 62, (2) 360 - 360, 2007 08 21 18pRE-9 Shear-Induced Structural Transition of the Lamellar Phase in a Surfactant/Water System : Analysis of Temperature Dependence by using Small-Angle Scattering, Kosaka Y.; Ito M.; Kawabata Y.; Kato T., Meeting abstracts of the Physical Society of Japan, 62, (1) 328 - 328, 2007 02 28 18pRE-14 Kinetic pathway of gel phase in a nonionic surfactant solution, Kawabata Y.; Matsuno S.; Kato T., Meeting abstracts of the Physical Society of Japan, 62, (1) 329 - 329, 2007 02 28 Micellar/Lamellar Phase Separation Processes in a Nonionic Surfactant/Water System(New Frontiers in Colloidal Physics : A Bridge between Micro- and Macroscopic Concepts in Soft Matter) :, Kakizawa Minori; Ueda Yusaku; Shinohara Rie; Kawabata Youhei; Kato Tadashi, 物性研究, 89, (1) 30 - 31, 2007 , 界面活性剤が水と共に様々な相を形成することはよく知られているが,相転移の動的過程については充分な研究が行われていない。特に各相の構成単位が互いに大きく異なるミセル相からラメラ相への転移の機構は興味深い。われわれはミセルとラメラの中間的な構造を見出すことを期待して,ミセル相からミセル/ラメラ共存領域に温度ジャンプさせた後の相分離過程を,時分割小角X線・光散乱および光学顕微鏡を用いて追跡した。 Temperature- and pressure-dependence of nanometer scale structures in water/oil/surfactant systems, Hideki Seto; Michihiro Nagao; Youhei Kawabata, Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu, 17, (2) 122 - 130, 2007 , 10.4131/jshpreview.17.122 極限条件下 両親媒性分子膜系のナノスケール構造とダイナミクス (小角散乱特集), 瀬戸 秀紀; 長尾 道弘; 川端 庸平, 放射光, 19, (6) 408 - 418, 2006 11 時分割小角光散乱および光学顕微鏡観察によるミセル/ラメラ相分離過程の追跡, 植田裕作; 篠原理恵; 川端庸平; 好村滋行; 加藤直, コロイドおよび界面化学討論会講演要旨集, 59th, 2006 08 30 28pPSB-24 Shape fluctuation of sphere to rod micelles in a surfactant solution, Kawabata Y.; Seto H.; Kato T., Meeting abstracts of the Physical Society of Japan, 61, (1) 367 - 367, 2006 03 04 12pTJ-4 Development of spin flippers with steady current for the TOF-NSE spectrometer III, Takeda Takayoshi; Yamada Norifumi L.; Katoh Katsuya; Seto Hideki; Nagao Michihiro; Kawabata Youhei; Takeda Masayasu; Torikai Naoya, Meeting abstracts of the Physical Society of Japan, 59, (2) 852 - 852, 2004 08 25 非イオン界面活性剤ラメラ相のずり流動場誘起転移(ソフトマターの物理学2004-変形と流動-,研究会報告), 宮崎 香子; 川端 庸平; 加藤 直, 物性研究, 83, (3) 317 - 318, 2004 Development of spin flippers with steady current for the TOF-NSE spectrometer II, Takeda Takayoshi; Yamada Norifumi; Ihara Daisuke; Seto Hideki; Nagao Michihiro; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 58, (2) 860 - 860, 2003 08 15 Neutron Spin Echo Study on Dynamics of lipid bilayers in the DPPC/D_2O/CaCl_2 System, Takeda Takayoshi; Yamada Norifumi; Kawabata Youhei; Seto Hideki; Nagao Michihiro, Meeting abstracts of the Physical Society of Japan, 58, (2) 300 - 300, 2003 08 15 Temperature and pressue-dependences of abending modulus of ionicsurfadantfim, 瀬戸 秀紀; 川端 庸平; 長尾 道弘; 武田 隆義, Meeting abstracts of the Physical Society of Japan, 58, (2) 301 - 301, 2003 08 15 Development of spin flippers with steady current for the TOF-NSE spectrometer, Takeda Takayoshi; Yamada Norifumi; Ihara Daisuke; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 58, (1) 914 - 914, 2003 03 06 界面活性剤ラメラ相の構造に対するずり流動場の効果(ソフトマターの物理学2003-普遍性と多様性-,研究会報告), 加藤 直; 嶺脇 広二; 宮崎 香子; 川端 庸平; 今井 正幸, 物性研究, 81, (2) 228 - 229, 2003 中性子スピンエコー法・動的光散乱法を用いた両親媒性分子膜の熱揺らぎ, 川端庸平; 長尾道弘; 瀬戸秀紀; 武田隆義; 加藤直; 好村滋行, 日本中性子科学会年会講演概要集, 2nd, 2002 12 09 Neutron Spin Echo and Dynamic Lighl Scattering studies Oo dynamics olmicroemulsioas, Kawabata Youhei; Nagao Michihiro; Seto Hideki; Kato Tadashi; Takeda Takayoshi; Komura S., Meeting abstracts of the Physical Society of Japan, 57, (2) 304 - 304, 2002 08 13 25aYB-4 Neutron Spin Echo Study on Dynamics of lipid bilayers in the liquid crystalline phase La of DPPC/D2O/CaC12 System, Takeda Takayoshi; Yamada Norifumi; Kawabata Youhei; Seto Hideki; Nagao Michihiro, Meeting abstracts of the Physical Society of Japan, 57, (1) 315 - 315, 2002 03 01 25aYB-2 Dependence of structure on temperature and pressure in the DPPC/HsO/CaCL2 system, Yamada Norifumi; Takeda Takayoshi; Nobutou Hidekazu; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 57, (1) 314 - 314, 2002 03 01 25aYB-1 Effects of temperature and pressure on structural formation in microemuision system including AOT, Nagao Michihiro; Seto Hideki; Kawabata Youhei; Yamada Norifumi, Meeting abstracts of the Physical Society of Japan, 57, (1) 314 - 314, 2002 03 01 P5 界面活性剤膜の温度・圧力依存性(基研研究会「ソフトマターの物理学」,研究会報告), 川端 庸平; 長尾 道弘; 瀬戸 秀紀; 武田 隆義; 好村 滋行, 物性研究, 79, (2) 234 - 234, 2002 Neutron spin echo studies on effects of temperature and pressure on structural phase transitions and dynamics in complex fluids involving amphiphiles, KAWABATA Youhei, Memoirs of the Faculty of Integrated Arts and Sciences, Hiroshima University. IV, Science reports : studies of fundamental and environmental sciences, 28, 2002 Pressure effects on the Dynamics of the Amphiphilic Membrane., 川端庸平; 長尾道弘; 瀬戸秀紀; 武田隆義; 好村滋行, 高圧討論会講演要旨集, 42nd, 2001 11 01 Development of spin flippers with steady current for a white neutron beam, Takeda Takayoshi; Seto Hideki; Kawabata Youhei; Yamada Norifumi, Meeting abstracts of the Physical Society of Japan, 56, (2) 837 - 837, 2001 09 03 Dependence of structural parameters on temperature and concentration, Yamada Norifumi; Takeda Takayoshi; Nobutou Hidekazu; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 56, (2) 256 - 256, 2001 09 03 Structural formation in microemulsion system, Nagao Michihiro; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 56, (2) 257 - 257, 2001 09 03 Small angle neutron scattering study on the interdigitaed phasc of DPPC induced by pressure, Nobutou Hidekazu; Seto Hideki; Yamada Norifumi; Takeda Takayoshi; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 56, (2) 256 - 256, 2001 09 03 Pressure and temperature dependencies of membrane dynamics in a temary microemulsion., Kawabata Youhei; Nagao Michinori; Seto Hideki; Takeda Takayoshi; Komura Shigeyuki, Meeting abstracts of the Physical Society of Japan, 56, (2) 255 - 255, 2001 09 03 Neutron Spin Echo Study on Dynamics of lipid bilayers in the liquid crystalline phase L_α of DPPC/D_2O/CaCl_2System, Takeda Takayoshi; Yamada Norifumi; Kawabata Youhei; Seto Hideki; Nagao Michihiro, Meeting abstracts of the Physical Society of Japan, 56, (2) 255 - 255, 2001 09 03 Dynamical Structure of Microemulsion Droplets Confining a Polymer Chain, Nakaya K.; Imai M.; Takeda T.; Seto H.; Kawabata Y., Meeting abstracts of the Physical Society of Japan, 56, (2) 256 - 256, 2001 09 03 Dynamical fluctuation of the mesoscopic structure in ternary C12E5-water-n-octane amphiphile system, S Komura; T Takeda; Y Kawabata; SK Ghosh; H Seto; M Nagao, PHYSICAL REVIEW E, 63, 2001 04 AOT系マイクロエマルジョンのダイナミクス (「スピンエコー分光法の開発と応用」ワークショップ報告書), 長尾 道弘; 川端 庸平; 瀬戸 秀紀, KURRI-KR, (64) 67 - 76, 2001 03 22 Neutron Spin Echo Investigations on Dynamics in Ternary C12E5/n-octane/D2O and DPPC/D2O/CaCl2 Amphiphilic Systems (Proceedings of the 1st International Symposium on Advanced Science Research(ASR-2000), Advances in Neutron Scattering Research), TAKEDA T., Journal of the Physical Society of Japan, 70, 2001 Development of the Measurement System of Neutron Spin Echo Spectrometer ISSP-NSE at JRR-3M (Proceedings of the 1st International Symposium on Advanced Science Research(ASR-2000), Advances in Neutron Scattering Research), Kawabata Youhei; Nagao Michihiro; Satoh Setsuo, Journal of the Physical Society of Japan, 70, 2001 Carbon Number Study on Self-Assemble Mechanisms in AOT/D2O/n-alkane Microemulsion Systems (Proceedings of the 1st International Symposium on Advanced Science Research(ASR-2000), Advances in Neutron Scattering Research), Nagao Michihiro; Seto Hideki; Kawabata Youhei, Journal of the Physical Society of Japan, 70, 2001 Neutron spin-echo study of the dynamic behavior of amphiphilic diblock copolymer micelles in aqueous solution, H Matsuoka; Y Yamamoto; M Nakano; H Endo; H Yamaoka; R Zorn; M Monkenbusch; D Richter; H Seto; Y Kawabata; M Nagao, LANGMUIR, 16, (24) 9177 - 9185, 2000 11 , 10.1021/la9915421 Neutron spin echo studies on effects of temperature and pressure in dynamics of amphiphilic membranes, Kawabata Youhei; Nagao Michihiro; Seto Hideki; Takeda Takayoshi, Meeting abstracts of the Physical Society of Japan, 55, (2) 301 - 301, 2000 09 10 NEUTRON SPIN ECH0 INVESTIGATIONS ON DYNAMICS IN COMPLEX FLUIDS WITH AMPHIPHILES II, Takeda T.; Kawbata Y.; Seto H.; Komura S.; Nagao M.; Ghosh S. K., Meeting abstracts of the Physical Society of Japan, 55, (2) 301 - 301, 2000 09 10 Pressure effects on mechanisms of the structural formation in ternary microemulsion systems, Nagano Michihiro; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 55, (2) 301 - 301, 2000 09 10 24pN-2 Pressure and temperature effects on structural behavior of microemulsion system II, SETO Hideki; OKUHARA Daisuke; NAGAO Michihiro; KAWABATA Youhei; SUZUKI Jiro; KAMIKUBO Hironari; AMEMIYA Yoshiyuki, Meeting abstracts of the Physical Society of Japan, 54, (2) 292 - 292, 1999 09 03 24pN-3 Pressure and temperature effects on structural behavior of microemulsion system III, KAWABATA Y; NAGAO M; SETO H; TAKEDA T, Meeting abstracts of the Physical Society of Japan, 54, (2) 293 - 293, 1999 09 03 24pN-1 Pressure and temperature effects on structural behavior of microemulsion system, NAGAO Michihiro; SETO Hideki; KAWABATA Youhei; TAKEDA Takayoshi, Meeting abstracts of the Physical Society of Japan, 54, (2) 292 - 292, 1999 09 03 24pN-4 NEUTRON SPIN ECHO INVESTIGATIONS ON DYNAMICS IN COMPLEX FLUIDS WITH AMPHIPHILES II, TAKEDA T; KAWABATA Y; SETO H; KOMURA S; GHOSH S.K; NAGAO M, Meeting abstracts of the Physical Society of Japan, 54, (2) 293 - 293, 1999 09 03 29a-XG-12 Temperature-and pressure-Induced phase transition in a ternary microemulsion, Nagao M.; Seto H.; Kawabata Y.; Okuhara D.; Matsushita Y., Meeting abstracts of the Physical Society of Japan, 54, (1) 726 - 726, 1999 03 15 29a-XG-11 Pessure induced structural change of water-in-oil microemulsion, Seto H.; Okuhara D.; Nagao M.; Kawabata Y.; Suzuki J.; Takeda T., Meeting abstracts of the Physical Society of Japan, 54, (1) 726 - 726, 1999 03 15 中性子スピンエコー法による界面活性剤系のダイナミックス--原研JRR3におけるspin echoの経験とその可能性 (「冷中性子スピン干渉実験の進展とその応用(3)」ワークショップ--干渉性研究と冷中性子スピン干渉実験(3)), 瀬戸 秀紀; 武田 隆義; 川端 庸平, KURRI-KR, (35) 17 - 20, 1999 03 Neutron spin echo studies on structural phase transitions induced by temperature and pressure in a ternary microemulsion, M Nagao; Y Kawabata; H Seto; T Takeda; S Komura; Y Matsushita, SLOW DYNAMICS IN COMPLEX SYSTEMS, 469, 1999 NEUTRON SPIN ECHO INVESTIGATIONS ON DYNAMICS IN COMPLEXFLUIDS WITH AMPHIPHILES, TAKEDA T.; KAWABATA Y.; SETO H.; BRULET A.; TEIXEIRA J.; KOMURA S.; GHOSH S.K.; NAGAO M.; OKUHARA D., Meeting abstracts of the Physical Society of Japan, 53, (2) 849 - 849, 1998 09 05 A structural phase transition from droplet to lamellar/bicontinuous in a microemulsion system II.Small-angle X-ray scattering, OKUHARA D.; SETO H.; NAGAO M.; KAWABATA Y.; SUZUKI J.; TAKEDA T., Meeting abstracts of the Physical Society of Japan, 53, (2) 849 - 849, 1998 09 05 7p-YA-5 Neutron spin echo study of network of worm-like micelles, Seto H.; Kato T.; Takeda T.; Nagao M.; Okuhara D.; Kawabata Y.; Imai M., Meeting abstracts of the Physical Society of Japan, 52, (2) 844 - 844, 1997 09 16
Research Grants & Projects
日本学術振興会, 科学研究費助成事業, メレンゲ泡界面の量子ビームによる構造可視化を用いた泡沫安定性と物性の改質, 20230401, 20260331, 川端 庸平; 阿久津 和宏; 山田 悟史 Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Intermediate Structures between Lamellar and Onion Phases under Shear Flow and Long-range Orientational Order, 20150401, 20180331, Kato Tadashi; KUGIZAKI SHIORI; SUZUKI KENTO; OHNO KOUSAKU; NASHIMA TAKESHI, Although the transition from the surfactant lamellar phase into the “onion phase” where all the space is filled by multilamellar vesicles has been reported for many systems, conditions of onion formation and the transition mechanism are still unclear. We have performed the following studies by using simultaneous measurements of rheology/small-angle X-ray scattering（rheo-SAXS）and simultaneous measurements of rheology/small-angle light scattering（rheo-SALS) for a nonionic surfactant (C14E5)/water system.
(1) Development of a double cylinder cell which can be used both for SAXS and SALS. (2) Determination of a temperature-shear rate diagram and elucidation of three-dimensional structures of the onion phase with a long-range orientational order. (3) Determination of the intermediate structure between lamellar and onion phases formed in the low-shear rate region. Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Conditions and mechanism for onion formation under shear flow, 20110401, 20140331, KATO Tadashi; KOMURA Shigeyuki; KAWABATA Youhei, Although shear-induced lamellar-to-onion transition has been found for many surfactant/water systems, conditions of onion formation and transition mechanism are still unclear. In this study, we have found for the first time that there exist both upper and lower limits for the temperature range of onion formation and that only one of them has been observed so far. We have also derived an expression of the elastic energy for the polyhedral onions to explain the existence of these upper and lower temperature limits. Furthermore, we have found that the change in the orientation of lamellae follows the same path in all the four kinds of transition processes, i.e., the lamellar-to-onion and onion-to-lamellar transitions near the upper and lower temperature limits. Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Morphology of lamellar domain structure in a surfactant aqueous solution, 2009, 2011, KAWABATA Youhei, In a nonionic surfactant aqueous solution, we have investigated the morphology and the formation mechanism of the giant lamellar structures which are formed with crystallization of the hydrophobic group of a surfactant molecule inμm scale, by means of optical microscope, X-ray diffraction and light scattering. We have found that the structure of hydrophilic parts of a surfactant molecule contributes to the formation of the domain morphologies, and that a relatively stable disk-like domain in the case of large head area of the surfactant gradually becomes spherical vesicles because of the unstable structure of its edge part. Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Dynamics of Shear-Induced Structural Transition in Ordered Lyotropic Systems, 2006, 2010, KATO Tadashi; KOMURA Shigeyuki; KAWABATA Youhei; FUJII Masatoshi, Although it has been known that the shear flow induces structural transition in the lyotropic phase (self-assemblies with a long-range order) composed of amphiphiles, the transition mechanism remains still unclear. In this study, we have focused on the transformation of the surfactant lamellar phase into the onion phase where the multilamellar vesicles are close-packed. We have found for the first time the lamellar→onion and lamellar→onion→lamellar transition with increasing temperature under shear flow. Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Effects of Shear Flow on the Structures of Lamellar Liquid Crystals and Slow Dynamics, 2003, 2005, KATO Tadashi; KOMURA Shigeyuki; FUJII Masatoshi; KAWABATA Youhei, In the past 10 years, much attention has been paid to the effects of shear flow on the structure of a lamellar phase. In the present study, we have measured small-angle neutron and X-ray scattering, small-angle light scattering, and shear stress on the lamellar phases of a nonionic surfactant C_nH_<2n+1>(OC_2H_4)_mOH (C_nE_m) in D_2O under shear flow. We have found discontinuous decrease in the lamellar spacing for the shear rate of 0.3-1 s^<-1> suggesting local phase separation into concentrated lamellar and water-rich regions. We have also tried to clarify the mechanism of the local phase separation. The results can be summarized as follows.
1. Construction of an apparatus
We have constructed an apparatus for small-angle light scattering and small-angle X-ray scattering measurements under shear flow to investigate structural change in μm scale and nm scale, respectively.
2. Time-resolved small-angle neutron scattering (SANS) and light scattering (SALS) under shear
Time evolutions of 2-dimensionl SANS and SALS patterns have been observed after applying shear flow with a constant shear rate. The SANS results indicate discontinuous decrease in the repeat distance a few hours after applying shear flow in the range of shear rate 0.3-3s^<-1>, suggesting some sort of transition. It has been found that the repeat distance in the steady state takes a minimum around 1s^<-1>. From the SALS measurements, on the other hand, structural change in μm scale occurs a few minutes after applying shear flow. The decrease in the repeat distance may be induced by such a structural change in μm scale. At the shear rate of 3s^<-1>, a scattering pattern suggesting formation of the onion phase has been observed.
3. Measurements of shear stress
Time evolution of the shear stress has been recorded after applying shear flow with a constant shear rate. In the lower range of shear rte, the shear stress in the steady state increases with increasing shear rate. As the shear rate exceeds about 1s^<-1>, the shear stress decreases with shear rate, supporting the SANS results. 日本学術振興会, 科学研究費助成事業, 中性子スピンエコー法・動的光散乱法を用いた両親媒性分子膜の圧力効果についての研究, 2003, 2004, 川端 庸平, 生体膜やナノスケールの膜構造のモデル系として注目されている、界面活性剤分子の自己集合構造に対する圧力効果を調べ、構造形成要因の解明を目的とした。本研究では、まず(1)前年度開発した高圧容器の改良を行った。この高圧容器は顕微鏡観察に開発されたものであるが、窓材をダイヤモンドに改良することによりX線小角散乱実験が可能となった。さらに、(2)非イオン界面活性剤C16E7/水、C16E6/水系において、紐状ミセルのネットワーク構造を形成する数10%の界面活性剤濃度において、温度を一定の条件下で中性子小角散乱実験を行った。これまでの実験結果から、2000気圧程度の圧力下で長周期の秩序相(ラメラ構造)が出現することが分かっていたが、界面活性剤の疎水基が指組構造のゲル相(水和固体相)であることを初めて見出した。また、ゲル相への相転移曲線が界面活性剤の疎水基と同じ炭素数を持つヘキサデカンの融解曲線と一致し、ゲル相への転移が疎水基の固化によって決まることが明らかとなった。(3)圧力の効果をさらに詳しく調べるために、ミセル相における圧力効果を中性子スピンエコー法により調べた。ミセル相の単位構造(紐状ミセル)は圧力増加で静的構造も動的構造もほとんど変化を示さない一方、高次構造である紐状ミセルのネットワーク構造が圧力増加とともに変化した。構造解析の結果、界面活性剤濃度が濃厚な部分と希薄な部分がμスケールのドメイン構造を形成し、動的構造を特徴付ける緩和速度も小さくなることが分かった。この結果から、圧力増加により疎水性相互作用が増して疎水基間の引力が大きくなったことが示唆され、圧力変化では主に疎水基の圧縮性や疎水基間の疎水性相互作用により構造が変化していくことが明らかになった。
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Website：http://kaken.nii.ac.jp/ja/r/50347267
Last Update :2025/06/09
Researcher Profile and Settings
Name
| KAWABATA Youhei |
Affiliation (Master)
| College of Agriculture,Food and Environment Sciences, Department of Food Science and Human Wellness |
Affiliation & Job
| Rakuno Gakuen University |
| Department of Food Science and Human Wellness, College of Agriculture, Food and Environment Sciences |
Research Activities
Research Areas
| Nanotechnology/Materials, Basic physical chemistry |
| Natural sciences, Bio-, chemical, and soft-matter physics |
Research Interests
| 界面活性剤, |
| 相転移, |
| ダイナミクス, |
| 構造形成過程, |
| 構造解析, |
| ラメラ液晶, |
| 中性子スピンエコー法, |
| 中性子・X線小角散乱法, |
| ベシクル, |
| ネットワーク構造, |
| クラフト転移, |
| リオトロピック液晶, |
| 自己集合構造, |
| 構造形成要因, |
| 水和固体相, |
| 共焦点顕微鏡, |
| 圧力, |
| 相分離構造, |
| 散乱実験, |
| 界面活性剤水溶液, |
| 中性子小角散乱, |
| X線小角散乱, |
| 小角光散乱, |
| 秩序系, |
| レオロジー, |
| 流動場, |
| 光散乱, |
| ラメラ相, |
| リオトロピック相, |
| ずり流動場, |
Published Papers
| Role of sugar and sugar alcohols in the wet-curing process of unheated meat products in Japan, Kensuke YAJIMA; Youhei KAWABATA; Yasuhiro HASEGAWA; Naoyuki MAEDA; Tomohito IWASAKI, Nihon Chikusan Gakkaiho, Japanese Society of Animal Science, 94, (4) 433 - 440, 2023 11 25 |
| Change in foam characteristics due to heat treatment during meringue preparation, Soshin ISHIKAWA, Youhei KAWABATA and Isamu KANEDA, 2023 10 |
| Stopped-flow/SAXS Observation of Vesicle Formation Process in Dichain Cationic Surfactant Aqueous Solutions, Youhei Kawabata; Kento Hayashi; Sachiko Masaoka, SPring-8/SACLA利用研究成果集, 9, (5) 266 - 269, 2021 08 |
| Comparison of characteristics of single-walled carbon nanotubes obtained by super-growth CVD and improved-arc discharge methods pertaining to interfacial film formation and nanohybridization with polymers, Ahmed A. Almarasy; Takuto Hayasaki; Yoshinori Abiko; Youhei Kawabata; Shuichi Akasaka; Atsuhiro Fujimori, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 615, 2021 04 |
| Polypseudorotaxane-based supramolecular hydrogels consisting of cyclodextrins and Pluronics as stabilizing agents for antibody drugs, Naoko Ohshita; Keiichi Motoyama; Daisuke Iohara; Fumitoshi Hirayama; Toru Taharabaru; Naoki Watabe; Youhei Kawabata; Risako Onodera; Taishi Higashi, Carbohydrate Polymers, 256, 2021 03 15 |
| Characterization of Molecular Arrangement of Long-chain Ferrocenyl Derivatives Having Asymmetric Carbon by Method of Organized Molecular Films and Formation of Its Helical Nanofibers, Yusuke Kimura; Yuki Mashiyama; Haruka Maruyama; Youhei Kawabata; Tatsuro Kijima; Atsuhiro Fujimori, ChemistrySelect, 6, (9) 2198 - 2209, 2021 03 05 |
| Formation, Structure, and Function of Hydrogenated and Fluorinated Long-Chain Phosphonate-Modified Single-Walled Carbon Nanotubes with Bidentate Bonds, Yoshinori Abiko; Takuto Hayasaki; Shuhei Hirayama; Ahmed A. Almarasy; Youhei Kawabata; Atsuhiro Fujimori, ChemistrySelect, 5, (22) 6594 - 6607, 2020 06 16 |
| Effect of supported MAO cocatalysts in ethylene polymerization and ethylene/1-hexene copolymerization using Cp*TiCl |
| Effect of the Crystallization Process of Surfactant Bilayer Lamellar Structures on the Elongation of High-Aspect-Ratio Gold Nanorods, Takamichi Inaba; Yoshiko Takenaka; Youhei Kawabata; Tadashi Kato, Journal of Physical Chemistry B, 123, (22) 4776 - 4783, 2019 06 06 |
| Self-assembly of sulfur-containing heterocyclic compounds constructed by thianthrene units and their sulfonium salts, Kazunori Hirabayashi; Kenki Ebine; Youhei Kawabata; Yoshihiro Yoshida; Toshio Shimizu, Heteroatom Chemistry, 29, (5-6) , 2018 12 |
| Effect of interlamellar interactions on shear induced multilamellar vesicle formation, Y. Kawabata; R. Bradbury; S. Kugizaki; K. Weigandt; Y. B. Melnichenko; K. Sadakane; N. L. Yamada; H. Endo; M. Nagao; H. Seto, Journal of Chemical Physics, 147, (3) , 2017 07 21 |
| Hydrophilic and hydrophobic tail effects on vesicle formation in a non-ionic surfactant aqueous solution below the Krafft temperature, Youhei Kawabata; Kana Ohmoto; Akira Murakami; Yuto Takahashi; Yousuke Yamauchi; Tadashi Kato, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 520, 779 - 787, 2017 05 05 |
| Effects of Oscillatory Shear on the Orientation of the Inverse Bicontinuous Cubic Phase in a Nonionic Surfactant/Water System, Mutsumi Yamanoi; Youhei Kawabata; Tadashi Kato, Langmuir, 32, (12) 2863 - 2873, 2016 03 29 |
| Rheological properties of wormlike micelles formed in concentrated region of nonionic surfactant (C |
| Pressure-Induced Transition of Bilayers in a Nonionic Surfactant Solution, Tetsuo Takano; Youhei Kawabata; Takuro Suzuki; Tadashi Kato, Journal of Physical Chemistry B, 119, (35) 11656 - 11663, 2015 09 03 |
| Vesicle formations at critical vesicle concentration in a polyoxyethylene type nonionic surfactant system, Youhei Kawabata; Kunihiro Ichiguchi; Takahito Ando; Tadashi Kato, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 462, 179 - 185, 2014 11 01 |
| Mesoscopic simulation of phase behaviors and structures in an amphiphile-solvent system, Kohtaro Yamada; Emiko Yasuno; Youhei Kawabata; Tohru Okuzono; Tadashi Kato, Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 89, (6) 062310 - 7pp, 2014 06 23 |
| Electrolyte effect on lamellar domain morphology in a nonionic surfactant solution below the Krafft temperature, Youhei Kawabata; Akira Murakami; Tadashi Kato, Journal of Physical Chemistry B, 118, (4) 1022 - 1029, 2014 01 30 |
| Bilayer structure of ester-amide-type cationic surfactants in a dilute aqueous solution, Youhei Kawabata; Kento Hayashi; Tomoki Kanao; Akira Ishikawa, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 441, 140 - 148, 2014 01 20 |
| Effects of surfactant concentration on formation of high-aspect-ratio gold nanorods, Yoshiko Takenaka; Youhei Kawabata; Hiroyuki Kitahata; Masaru Yoshida; Yoko Matsuzawa; Takuya Ohzono, Journal of Colloid and Interface Science, 407, 265 - 272, 2013 10 01 |
| Re-entrant lamellar/onion transition with varying temperature under shear flow, Daijiro Sato; Kahoru Obara; Youhei Kawabata; Makio Iwahashi; Tadashi Kato, Langmuir, 29, (1) 121 - 132, 2013 01 08 |
| Microscopic investigation on morphologies of bilayer gel structure in the mixed polyoxyethylene-type nonionic surfactant systems, Yuko Nagai; Youhei Kawabata; Tadashi Kato, Journal of Physical Chemistry B, 116, (41) 12558 - 12566, 2012 10 18 |
| 3D structure of lamellar domains in a surfactant solution below the Krafft temperature, Youhei Kawabata; Hirohito Yashima; Tadashi Kato, Journal of Physical Chemistry B, 116, (5) 1593 - 1597, 2012 02 09 |
| 19aFN-3 Elongation mechanism of high-aspect-ratio gold nanorods, Takenaka Yoshiko; Kawabata Youhei; Kitahata Hiroyuki; Ohzono Takuya, Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 67.2.4, 2012 |
| Control of the Long-axis Length of Gold Nanorods through Temperature Variation, Yoshiko Takenaka; Youhei Kawabata; Hiroyuki Kitahata; Takuya Ohzono, Chemistry Letters, 41, (10) 1173 - 1175, 2012 |
| Transition processes from the lamellar to the onion state with increasing temperature under shear flow in a nonionic surfactant/water system studied by Rheo-SAXS, Makiko Ito; Yuriko Kosaka; Youhei Kawabata; Tadashi Kato, Langmuir, 27, (12) 7400 - 7409, 2011 06 21 |
| Vesicle growth and deformation in a surfactant solution below the Krafft temperature, Youhei Kawabata; Tomoaki Shinoda; Tadashi Kato, Physical Chemistry Chemical Physics, 13, (8) 3484 - 3490, 2011 02 28 |
| Worm-Like Micelles in a Binary Solution of Nonionic Surfactant C |
| Lamellar-to-onion transition with increasing temperature under shear flow in a nonionic surfactant/water system, Yuriko Kosaka; Makiko Ito; Youhei Kawabata; Tadashi Kato, Langmuir, 26, (6) 3835 - 3842, 2010 03 16 |
| Detector area expansion at iNSE neutron spin echo spectrometer, N. L. Yamada; H. Endo; N. Osaka; Y. Kawabata; M. Nagao; T. Takeda; H. Seto; M. Shibayama, Physica B: Condensed Matter, 404, (17) 2607 - 2610, 2009 09 01 |
| Formation process of bilayer gel structure in a nonionic surfactant solution, Youhei Kawabata; Akimi Matsuno; Tomoaki Shinoda; Tadashi Kato, Journal of Physical Chemistry B, 113, (17) 5686 - 5689, 2009 04 |
| Micelle structures in aqueous solutions of glucose-based surfactants having an isoprenoid-type hydrophobic chain, Taiki Kato; Youhei Kawabata; Masatoshi Fujii; Tadashi Kato; Masakatsu Hato; Hiroyuki Minamikawa, Journal of Colloid and Interface Science, 312, (1) 122 - 129, 2007 08 01 |
| Shear-induced structural transition in the lamellar phase of the C |
| Hexagonally ordered nanostructures comprised of a flexible disk-like molecule with high self-assembling properties at neutral and cationic states, Masashi Hasegawa; Hideo Enozawa; Youhei Kawabata; Masahiko Iyoda, Journal of the American Chemical Society, 129, (11) 3072 - 3073, 2007 03 21 |
| Detector Area Expansion at iNSE Neutron Spin Echo Spectrometer, Yamada N. L.; Nagao M.; Kawabata Y.; Takeda T.; Seto H.; Endo H.; Osaka N.; Shibayama M., hamon, The Japanese Society for Neutron Science, 17, (2) 132 - 135, 2007 |
| Pressure effects on bending elasticities of surfactant monolayers in a ternary microemulsion composed of aerosol- OT D |
| Development of $π$ and $π$/2 flippers for a neutron spin echo spectrometer, Takeda Takayoshi; Yamada Norifumi L; Katou Katsuya; Nagao Michihiro; Seto Hideki; Kawabata Youhei; Takeda Masayasu; Torikai Naoya, Journal of Neutron Research, Taylor \& Francis, 15, (1) , 2007 |
| Relocation and upgrade of neutron spin echo spectrometer, iNSE, Michihiro Nagao; Norifumi L. Yamada; Youhei Kawabata; Hideki Seto; Hideki Yoshizawa; Takayoshi Takeda, Physica B: Condensed Matter, Elsevier, 385-386, 1118 - 1121, 2006 11 15 |
| Pressure-dependence of the bending modulus of surfactant monolayers in ternary microemulsion systems observed by neutron spin echo, H. Seto; M. Nagao; Y. Kawabata, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 284-285, 430 - 433, 2006 08 15 |
| Pressure effect on semi-microscopic structures and dynamics in a nonionic surfactant microemulsion, Hideki Seto; Michihiro Nagao; Youhei Kawabata, AIP Conference Proceedings, 832, 303 - 306, 2006 05 05 |
| SAXS, SANS and NSE studies on "unbound state" in DPPC/water/CaCl |
| Shear-induced structural transition in a lyotropic lamellar phase studied using small angle neutron and light scattering, T. Kato; K. Miyazaki; Y. Kawabata; S. Komura; M. Fujii; M. Imai, Journal of Physics Condensed Matter, 17, (31) , 2005 08 10 |
| Shear-induced structural transition in the lamellar phase of nonionic surfactants, Tadashi Kato; Kyoko Miyazaki; Yuriko Kosaka; Youhei Kawabata, Polymer Preprints, Japan, 54, (2) 3982 - 3983, 2005 |
| Small angle X-ray scattering from lamellar phase for β-3,7- dimethyloctylglucoside/water system: Comparison with β-n-alkylglucosides, Itaru Yamashita; Youhei Kawabata; Tadashi Kato; Masakatsu Hato; Hiroyuki Minamikawa, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 250, (1-3 SPEC. ISS.) 485 - 490, 2004 12 10 |
| Anomalous decrease in lamellar spacing by shear flow in a nonionic surfactant/water system, Tadashi Kato; Koji Minewaki; Youhei Kawabata; Masayuki Imai; Yoshiaki Takahashi, Langmuir, 20, (9) 3504 - 3508, 2004 04 |
| Neutron spin echo study on slow dynamics of lipid bilayers in the DPPC/D |
| Anomalous change in lamellar spacing by shear flow in nonionic surfactant/water system, T. Kato; K. Minewaki; K. Miyazaki; Y. Kawabata; M. Imai, AIP Conference Proceedings, 708, 94 - 95, 2004 04 |
| Temperature- and pressure-dependences of a bending modulus of surfactant monolayers in a ternary microemulsion composed of AOT / D |
| Droplet density dependences of the static and dynamic structures in a ternary microemulsion system, M. Nagao; H. Seto; Y. Kawabata; M. Shibayama, AIP Conference Proceedings, 708, 92 - 93, 2004 04 |
| Temperature and Pressure Effects on Thermal Fluctuations of Amphiphilic Monolayers, Kawabata Youhei; Nagao Michihiro; Seto Hideki; Takeda Takayoshi, hamon, The Japanese Society for Neutron Science, 14, (2) 134 - 138, 2004 |
| Temperature and Pressure Effects on the Bending Modulus of Monolayers in a Ternary Microemulsion, Y. Kawabata; M. Nagao; H. Seto; S. Komura; T. Takeda; D. Schwahn; N. L. Yamada; H. Nobutou, Physical Review Letters, 92, (5) 4 - 561034, 2004 |
| Effects of shear flow on structures of lamellar phase in a nonionic surfactant/water system, Tadashi Kato; Koji Minewaki; Kyoko Miyazaki; Youhei Kawabata; Toshiyuki Shikata; Shigeyuki Komura; Masatoshi Fujii, Progress in Colloid and Polymer Science, 129, 9 - 15, 2004 |
| Temperature and Pressure Dependences of a Microemulsion System, SETO Hideki; NAGAO Michihiro; KAWABATA Youhei, Journal of Oil Chemists' Society, Japan, Japan Oil Chemists' Society, 3, (10) 511 - 522, 2003 10 01 |
| Development of spin flippers with steady current for the TOF-NSE spectrometer, Takayoshi Takeda; Norifumi L. Yamada; Hideki Seto; Youhei Kawabata, Physica B: Condensed Matter, 335, (1-4) 211 - 214, 2003 07 |
| Neutron spin echo studies of the effects of temperature and pressure in a ternary microemulsion, Y. Kawabata; M. Nagao; H. Seto; S. Komura; T. Takeda; D. Schwahn, Applied Physics A: Materials Science and Processing, 74, (SUPPL.I) , 2002 12 |
| Slow dynamics of n-butoxyethanol-water mixture by neutron spin echo technique, K. Yoshida; T. Yamaguchi; M. Nagao; Y. Kawabata; H. Seto; T. Takeda, Applied Physics A: Materials Science and Processing, 74, (SUPPL.I) , 2002 12 |
| Effect of proteins on dynamics of water-in-oil AOT microemulsions, M. Hirai; R. Kawai-Hirai; H. Iwase; T. Hayakawa; Y. Kawabata; T. Takeda, Applied Physics A: Materials Science and Processing, 74, (SUPPL.II) , 2002 12 |
| Development of spin flippers with steady current for the TOF-NSE spectrometer at a pulsed spallation neutron source, T. Takeda; H. Seto; Y. Kawabata, Applied Physics A: Materials Science and Processing, 74, (SUPPL.I) , 2002 12 |
| Neutron spin echo studies on poly(vinyl alcohol) gel in a mixture of dimethyl sulfoxide and water, T. Kanaya; N. Takahashi; K. Nishida; K. Kaji; H. Seto; M. Nagao; Y. Kawabata; T. Takeda, Journal of Neutron Research, 10, (3-4) 149 - 153, 2002 |
| Temperature-and pressure-dependences of shape fluctuations in a ternary microemulsion system, Youhei Kawabata; Hideki Seto; Michihiro Nagao; Takayoshi Takeda, Journal of Neutron Research, 10, (3-4) 131 - 136, 2002 |
| Effects of temperature and pressure on phase transitions in a ternary microemulsion system, M. Nagao; H. Seto; T. Takeda; Y. Kawabata, Journal of Chemical Physics, 115, (21) 10036 - 10044, 2001 12 01 |
| Pressure-induced structural phase transition of dense droplet microemulsions studied by small-angle x-ray scattering, Hideki Seto; Michihiro Nagao; Youhei Kawabata; Takayoshi Takeda, Journal of Chemical Physics, 115, (20) 9496 - 9502, 2001 11 22 |
| Hydrodynamic interactions in the structural fluctuation of a ternary amphiphilic system C |
| Dynamical fluctuation of the mesoscopic structure in ternary C |
| Dynamical fluctuation of the mesoscopic structure in ternaryC12E5–water–n-octane amphiphilic system, Shigehiro Komura; Takayoshi Takeda; Youhei Kawabata; Swapan K. Ghosh; Hideki Seto; Michihiro Nagao, Physical Review E, American Physical Society (APS), 63, (4) , 2001 03 19 |
| Neutron spin echo studies on effects of temperature and pressure in dynamics of a ternary microemulsion, Y. Kawabata; M. Nagao; H. Seto; T. Takeda, Studies in Surface Science and Catalysis, 132, 209 - 212, 2001 |
| Pressure and temperature effects on the phase transition from a dense droplet to a lamellar structure in a ternary microemulsion, H Seto; D Okuhara; Y Kawabata; T Takeda; M Nagao; J Suzuki; H Kamikubo; Y Amemiya, JOURNAL OF CHEMICAL PHYSICS, 112, (23) 10608 - 10614, 2000 06 |
| Temperature and pressure effects on structural formations in a ternary microemulsion, M. Nagao; H. Seto; Y. Kawabata; T. Takeda, Journal of Applied Crystallography, 33, (3 I) 653 - 656, 2000 |
| Neutron spin echo study on the effects of temperature and pressure in a ternary complex fluid system, Y Kawabata; M Nagao; H Seto; T Takeda, STATISTICAL PHYSICS, 519, 193 - 195, 2000 |
| Membrane undulations in complex fluids involving amphiphiles, T Takeda; Y Kawabata; H Seto; SK Ghosh; S Komura; M Nagao, STATISTICAL PHYSICS, 519, 190 - 192, 2000 |
| Neutron spin–echo investigations of membrane undulations in complex fluids involving amphiphiles, T Takeda; Y Kawabata; H Seto; S Komura; S.K Ghosh; M Nagao; D Okuhara, Journal of Physics and Chemistry of Solids, Elsevier BV, 60, (8-9) 1375 - 1377, 1999 09 |
| Collective motions of a network of wormlike micelles, H Seto; T Kato; M Monkenbusch; T Takeda; Y Kawabata; M Nagao; D Okuhara; M Imai; S Komura, JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 60, (8-9) 1371 - 1373, 1999 08 |
| Improvement of neutron spin echo spectrometer at C2-2 of JRR3M, T. Takeda; H. Seto; Y. Kawabata; D. Okuhara; T. Krist; C. M.E. Zeyen; I. S. Anderson; P. Høghøj; M. Nagao; H. Yoshizawa; S. Komura; T. Ebisawa; S. Tasaki; M. Monkenbusch, Journal of Physics and Chemistry of Solids, Elsevier Science Ltd, 60, (8) 1599 - 1601, 1999 |
| Neutron spin echo investigations on the slow dynamics in complex fluids involving amphiphiles, T. Takeda; Y. Kawabata; H. Seto; S. Komura; S. K. Ghosh; M. Nagao, AIP Conference Proceedings, AIP, 1999 |
Conference Activities & Talks
| Interface structure of ovalbumin aqueous solution in merengue foams, Youhei Kawabata, International workshop for “Application of Quantum Beam to Food Science” |
| 食品乳化物・泡の構造観察とその物性, 川端庸平, 食品ハイドロコロイドセミナー2024 |
| オボアルブミンの表面偏析および水溶液中のナノ構造と泡沫安定性に関する考察, 山田 悟史; 三木 宏美; 高井 実花; 川端 庸平, 第75回コロイドおよび界面化学討論会 |
| 顕微鏡観察ならびに SAXS 測定を用いたココアの乳化構造観察, 高井 実花; 川端 庸平; 金田 勇, 第75回コロイドおよび界面化学討論会 |
| ポリグリセリン脂肪酸エステル／グリセリン／エステル油 ３成分系における相挙動, 岡 真佐人; 児玉 敬; 藤原 聡頼; 川端 庸平, 第62回日本油化学会年会 |
| 顕微赤外分光ならびにSAXS測定を用いたココアの乳化構造観察, 高井 実花; 川端 庸平; 金田 勇, 第62回日本油化学会年会 |
| 温度上昇に伴うオボアルブミン表面吸着の 偏析状態およびバルク構造の変化, 三木宏美; 安部美季; 武仲能子; 川端庸平; 吉村倫一; 山田悟史, 第62回日本油化学会年会 |
| Sucrose effects on interface and bulk structure of merengue, 川端庸平; 関美夕; 三木宏美; 武仲能子; 山田悟史; 高井実花; 金田勇, 第62回日本油化学会年会 |
| 中性子反射率法を用いたメレンゲ泡界面の表面剰余量評価, 山田 悟史; 高井 実花; 川端 庸平, 第74回コロイドおよび界面化学討論会 |
| 界面活性剤水溶液におけるリオトロピック液晶のオニオン/ベシクル構造形成, 川端庸平, 第74回コロイドおよび界面化学討論会 |
| ココアの乳化物における油脂結晶成長と界面構造, 高井実花; 川端庸平; 金田勇, 第74回コロイドおよび界面化学討論会 |
| メレンゲ作成時の熱処理による泡特性変化と界面構造, 川端庸平; 山田悟史; 高井実花; 金田勇, 日本油化学会第61回年会 |
| ココアの乳化構造と物性の温度依存性, 高井実花; 川端庸平; 金田勇, 第46回バイオレオロジー学会 |
| メレンゲ作成時の熱処理による泡特性変化, 川端庸平; 石川蒼心; 柴山万里; 金田勇, 第46回バイオレオロジー学会 |
| Mechanical property and emulsion structure of ganache, Youhei Kawabata; Yurina Ohta; Isamu Kaneda, The 73rd Divisional Meeting of Division of Colloid and Surface Chemistry |
| Structural analysis of food collods - application of microscopic Raman to foods -, Youhei Kawabata, 第261回 物質科学セミナー |
| 食品ハイドロコロイドのラマンイメージング, 川端 庸平, 食品ハイドロコロイドセミナー2021 |
| 顕微ラマンを用いたソフトマターのイメージング, 川端 庸平, 令和３年度日本顕微鏡学会北海道支部学術講演会 |
Misc
| Structures of Intermediate Region between Lamellar and Onion Phases in a Nonionic Surfactant (C14E5)/Water System, SUZUKI Kento; KAWABATA Youhei; KATO Tadashi, KEK Progress Report (Web), 2018 |
| Simultaneous Measurements of Rheology/Small-Angle Light Scattering on the Lamellar Phase of a Nonionic Surfactant and Re-Entrant Lamellar/Onion Transition with Varying Temperature, SUZUKI Kento; KAWABATA Youhei; KATO Tadashi, 日本化学会春季年会講演予稿集(CD-ROM), 97th, 2017 |
| Lamellar/Onion Intermediate Structure Formed in Low Shear Rate Region in a Nonionic Surfactant (C14E5)/Water System, SUZUKI Kento; KAWABATA Youhei; KATO Tadashi, KEK Progress Report (Web), 2017 |
| Orientation Control of Inverse Bicontinuous Cubic Phase by using Shear Alone: Effects of Strain Amplitude of “MAOS” and Replacement of LAOS by Steady Flow., KIRA Natsume; KAWABATA Youhei; KATO Tadashi, KEK Progress Report (Web), 2017 |
| 24pCJ-4 Current status of neutron focusing mirror and VIN ROSE at BL06 at J-PARC/MLF, Hino M.; Oda T.; Endo H.; Yamada N. L.; Yamagata Y.; Seto H.; Kawabata Y., Meeting Abstracts of the Physical Society of Japan, 70, (0) 2805 - 2805, 2015 , 10.11316/jpsgaiyo.70.1.0_2805 |
| 21pAK-6 Lamellar-onion-lamellar transition with varying temperature under shear flow, Sato Daijiro; Kawabata Youhei; Kato Tadashi, Meeting abstracts of the Physical Society of Japan, 67, (2) 353 - 353, 2012 08 24 |
| 23aPS-95 Hierarchic structure induced by the solvation effect in water and organic solvent with salt, Sadakane K.; Nagao M.; Endo H.; Osaka N.; Kawabata Y.; Seto H., Meeting abstracts of the Physical Society of Japan, 65, (1) 400 - 400, 2010 03 01 |
| 23aPS-109 Mesophases in mixtures of amphiphile and solvent, Yamada Kohtaro; Kawabata Youhei; Kato Tadashi, Meeting abstracts of the Physical Society of Japan, 65, (1) 404 - 404, 2010 03 01 |
| Neutron spin echo studies on dynamical structures of microemulsion, 川端 庸平; 長尾 道弘, Hamon, 20, (1) 80 - 83, 2010 01 |
| 27pVB-5 Lamellar/onion phase transition processes in a nonionic surfactant/water system, Ito Makiko; Kawabata Youhei; Kato Tadashi, Meeting abstracts of the Physical Society of Japan, 64, (1) 358 - 358, 2009 03 03 |
| High-pressure SANS and NSE experiments in microemulsion systems, Michihiro Nagao; Youhei Kawabata; Hideki Seto, Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu, 19, (1) 52 - 61, 2009 , 10.4131/jshpreview.19.52 |
| 21pRL-8 Structure and Rheology of gel phase in a nonionic surfactant solution, Kawabata Y.; Matsuno A.; Kato T., Meeting abstracts of the Physical Society of Japan, 62, (2) 360 - 360, 2007 08 21 |
| 18pRE-9 Shear-Induced Structural Transition of the Lamellar Phase in a Surfactant/Water System : Analysis of Temperature Dependence by using Small-Angle Scattering, Kosaka Y.; Ito M.; Kawabata Y.; Kato T., Meeting abstracts of the Physical Society of Japan, 62, (1) 328 - 328, 2007 02 28 |
| 18pRE-14 Kinetic pathway of gel phase in a nonionic surfactant solution, Kawabata Y.; Matsuno S.; Kato T., Meeting abstracts of the Physical Society of Japan, 62, (1) 329 - 329, 2007 02 28 |
| Micellar/Lamellar Phase Separation Processes in a Nonionic Surfactant/Water System(New Frontiers in Colloidal Physics : A Bridge between Micro- and Macroscopic Concepts in Soft Matter) :, Kakizawa Minori; Ueda Yusaku; Shinohara Rie; Kawabata Youhei; Kato Tadashi, 物性研究, 89, (1) 30 - 31, 2007 , 界面活性剤が水と共に様々な相を形成することはよく知られているが,相転移の動的過程については充分な研究が行われていない。特に各相の構成単位が互いに大きく異なるミセル相からラメラ相への転移の機構は興味深い。われわれはミセルとラメラの中間的な構造を見出すことを期待して,ミセル相からミセル/ラメラ共存領域に温度ジャンプさせた後の相分離過程を,時分割小角X線・光散乱および光学顕微鏡を用いて追跡した。 |
| Temperature- and pressure-dependence of nanometer scale structures in water/oil/surfactant systems, Hideki Seto; Michihiro Nagao; Youhei Kawabata, Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu, 17, (2) 122 - 130, 2007 , 10.4131/jshpreview.17.122 |
| 極限条件下 両親媒性分子膜系のナノスケール構造とダイナミクス (小角散乱特集), 瀬戸 秀紀; 長尾 道弘; 川端 庸平, 放射光, 19, (6) 408 - 418, 2006 11 |
| 時分割小角光散乱および光学顕微鏡観察によるミセル/ラメラ相分離過程の追跡, 植田裕作; 篠原理恵; 川端庸平; 好村滋行; 加藤直, コロイドおよび界面化学討論会講演要旨集, 59th, 2006 08 30 |
| 28pPSB-24 Shape fluctuation of sphere to rod micelles in a surfactant solution, Kawabata Y.; Seto H.; Kato T., Meeting abstracts of the Physical Society of Japan, 61, (1) 367 - 367, 2006 03 04 |
| 12pTJ-4 Development of spin flippers with steady current for the TOF-NSE spectrometer III, Takeda Takayoshi; Yamada Norifumi L.; Katoh Katsuya; Seto Hideki; Nagao Michihiro; Kawabata Youhei; Takeda Masayasu; Torikai Naoya, Meeting abstracts of the Physical Society of Japan, 59, (2) 852 - 852, 2004 08 25 |
| 非イオン界面活性剤ラメラ相のずり流動場誘起転移(ソフトマターの物理学2004-変形と流動-,研究会報告), 宮崎 香子; 川端 庸平; 加藤 直, 物性研究, 83, (3) 317 - 318, 2004 |
| Development of spin flippers with steady current for the TOF-NSE spectrometer II, Takeda Takayoshi; Yamada Norifumi; Ihara Daisuke; Seto Hideki; Nagao Michihiro; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 58, (2) 860 - 860, 2003 08 15 |
| Neutron Spin Echo Study on Dynamics of lipid bilayers in the DPPC/D_2O/CaCl_2 System, Takeda Takayoshi; Yamada Norifumi; Kawabata Youhei; Seto Hideki; Nagao Michihiro, Meeting abstracts of the Physical Society of Japan, 58, (2) 300 - 300, 2003 08 15 |
| Temperature and pressue-dependences of abending modulus of ionicsurfadantfim, 瀬戸 秀紀; 川端 庸平; 長尾 道弘; 武田 隆義, Meeting abstracts of the Physical Society of Japan, 58, (2) 301 - 301, 2003 08 15 |
| Development of spin flippers with steady current for the TOF-NSE spectrometer, Takeda Takayoshi; Yamada Norifumi; Ihara Daisuke; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 58, (1) 914 - 914, 2003 03 06 |
| 界面活性剤ラメラ相の構造に対するずり流動場の効果(ソフトマターの物理学2003-普遍性と多様性-,研究会報告), 加藤 直; 嶺脇 広二; 宮崎 香子; 川端 庸平; 今井 正幸, 物性研究, 81, (2) 228 - 229, 2003 |
| 中性子スピンエコー法・動的光散乱法を用いた両親媒性分子膜の熱揺らぎ, 川端庸平; 長尾道弘; 瀬戸秀紀; 武田隆義; 加藤直; 好村滋行, 日本中性子科学会年会講演概要集, 2nd, 2002 12 09 |
| Neutron Spin Echo and Dynamic Lighl Scattering studies Oo dynamics olmicroemulsioas, Kawabata Youhei; Nagao Michihiro; Seto Hideki; Kato Tadashi; Takeda Takayoshi; Komura S., Meeting abstracts of the Physical Society of Japan, 57, (2) 304 - 304, 2002 08 13 |
| 25aYB-4 Neutron Spin Echo Study on Dynamics of lipid bilayers in the liquid crystalline phase La of DPPC/D2O/CaC12 System, Takeda Takayoshi; Yamada Norifumi; Kawabata Youhei; Seto Hideki; Nagao Michihiro, Meeting abstracts of the Physical Society of Japan, 57, (1) 315 - 315, 2002 03 01 |
| 25aYB-2 Dependence of structure on temperature and pressure in the DPPC/HsO/CaCL2 system, Yamada Norifumi; Takeda Takayoshi; Nobutou Hidekazu; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 57, (1) 314 - 314, 2002 03 01 |
| 25aYB-1 Effects of temperature and pressure on structural formation in microemuision system including AOT, Nagao Michihiro; Seto Hideki; Kawabata Youhei; Yamada Norifumi, Meeting abstracts of the Physical Society of Japan, 57, (1) 314 - 314, 2002 03 01 |
| P5 界面活性剤膜の温度・圧力依存性(基研研究会「ソフトマターの物理学」,研究会報告), 川端 庸平; 長尾 道弘; 瀬戸 秀紀; 武田 隆義; 好村 滋行, 物性研究, 79, (2) 234 - 234, 2002 |
| Neutron spin echo studies on effects of temperature and pressure on structural phase transitions and dynamics in complex fluids involving amphiphiles, KAWABATA Youhei, Memoirs of the Faculty of Integrated Arts and Sciences, Hiroshima University. IV, Science reports : studies of fundamental and environmental sciences, 28, 2002 |
| Pressure effects on the Dynamics of the Amphiphilic Membrane., 川端庸平; 長尾道弘; 瀬戸秀紀; 武田隆義; 好村滋行, 高圧討論会講演要旨集, 42nd, 2001 11 01 |
| Development of spin flippers with steady current for a white neutron beam, Takeda Takayoshi; Seto Hideki; Kawabata Youhei; Yamada Norifumi, Meeting abstracts of the Physical Society of Japan, 56, (2) 837 - 837, 2001 09 03 |
| Dependence of structural parameters on temperature and concentration, Yamada Norifumi; Takeda Takayoshi; Nobutou Hidekazu; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 56, (2) 256 - 256, 2001 09 03 |
| Structural formation in microemulsion system, Nagao Michihiro; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 56, (2) 257 - 257, 2001 09 03 |
| Small angle neutron scattering study on the interdigitaed phasc of DPPC induced by pressure, Nobutou Hidekazu; Seto Hideki; Yamada Norifumi; Takeda Takayoshi; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 56, (2) 256 - 256, 2001 09 03 |
| Pressure and temperature dependencies of membrane dynamics in a temary microemulsion., Kawabata Youhei; Nagao Michinori; Seto Hideki; Takeda Takayoshi; Komura Shigeyuki, Meeting abstracts of the Physical Society of Japan, 56, (2) 255 - 255, 2001 09 03 |
| Neutron Spin Echo Study on Dynamics of lipid bilayers in the liquid crystalline phase L_α of DPPC/D_2O/CaCl_2System, Takeda Takayoshi; Yamada Norifumi; Kawabata Youhei; Seto Hideki; Nagao Michihiro, Meeting abstracts of the Physical Society of Japan, 56, (2) 255 - 255, 2001 09 03 |
| Dynamical Structure of Microemulsion Droplets Confining a Polymer Chain, Nakaya K.; Imai M.; Takeda T.; Seto H.; Kawabata Y., Meeting abstracts of the Physical Society of Japan, 56, (2) 256 - 256, 2001 09 03 |
| Dynamical fluctuation of the mesoscopic structure in ternary C12E5-water-n-octane amphiphile system, S Komura; T Takeda; Y Kawabata; SK Ghosh; H Seto; M Nagao, PHYSICAL REVIEW E, 63, 2001 04 |
| AOT系マイクロエマルジョンのダイナミクス (「スピンエコー分光法の開発と応用」ワークショップ報告書), 長尾 道弘; 川端 庸平; 瀬戸 秀紀, KURRI-KR, (64) 67 - 76, 2001 03 22 |
| Neutron Spin Echo Investigations on Dynamics in Ternary C12E5/n-octane/D2O and DPPC/D2O/CaCl2 Amphiphilic Systems (Proceedings of the 1st International Symposium on Advanced Science Research(ASR-2000), Advances in Neutron Scattering Research), TAKEDA T., Journal of the Physical Society of Japan, 70, 2001 |
| Development of the Measurement System of Neutron Spin Echo Spectrometer ISSP-NSE at JRR-3M (Proceedings of the 1st International Symposium on Advanced Science Research(ASR-2000), Advances in Neutron Scattering Research), Kawabata Youhei; Nagao Michihiro; Satoh Setsuo, Journal of the Physical Society of Japan, 70, 2001 |
| Carbon Number Study on Self-Assemble Mechanisms in AOT/D2O/n-alkane Microemulsion Systems (Proceedings of the 1st International Symposium on Advanced Science Research(ASR-2000), Advances in Neutron Scattering Research), Nagao Michihiro; Seto Hideki; Kawabata Youhei, Journal of the Physical Society of Japan, 70, 2001 |
| Neutron spin-echo study of the dynamic behavior of amphiphilic diblock copolymer micelles in aqueous solution, H Matsuoka; Y Yamamoto; M Nakano; H Endo; H Yamaoka; R Zorn; M Monkenbusch; D Richter; H Seto; Y Kawabata; M Nagao, LANGMUIR, 16, (24) 9177 - 9185, 2000 11 , 10.1021/la9915421 |
| Neutron spin echo studies on effects of temperature and pressure in dynamics of amphiphilic membranes, Kawabata Youhei; Nagao Michihiro; Seto Hideki; Takeda Takayoshi, Meeting abstracts of the Physical Society of Japan, 55, (2) 301 - 301, 2000 09 10 |
| NEUTRON SPIN ECH0 INVESTIGATIONS ON DYNAMICS IN COMPLEX FLUIDS WITH AMPHIPHILES II, Takeda T.; Kawbata Y.; Seto H.; Komura S.; Nagao M.; Ghosh S. K., Meeting abstracts of the Physical Society of Japan, 55, (2) 301 - 301, 2000 09 10 |
| Pressure effects on mechanisms of the structural formation in ternary microemulsion systems, Nagano Michihiro; Seto Hideki; Kawabata Youhei, Meeting abstracts of the Physical Society of Japan, 55, (2) 301 - 301, 2000 09 10 |
| 24pN-2 Pressure and temperature effects on structural behavior of microemulsion system II, SETO Hideki; OKUHARA Daisuke; NAGAO Michihiro; KAWABATA Youhei; SUZUKI Jiro; KAMIKUBO Hironari; AMEMIYA Yoshiyuki, Meeting abstracts of the Physical Society of Japan, 54, (2) 292 - 292, 1999 09 03 |
| 24pN-3 Pressure and temperature effects on structural behavior of microemulsion system III, KAWABATA Y; NAGAO M; SETO H; TAKEDA T, Meeting abstracts of the Physical Society of Japan, 54, (2) 293 - 293, 1999 09 03 |
| 24pN-1 Pressure and temperature effects on structural behavior of microemulsion system, NAGAO Michihiro; SETO Hideki; KAWABATA Youhei; TAKEDA Takayoshi, Meeting abstracts of the Physical Society of Japan, 54, (2) 292 - 292, 1999 09 03 |
| 24pN-4 NEUTRON SPIN ECHO INVESTIGATIONS ON DYNAMICS IN COMPLEX FLUIDS WITH AMPHIPHILES II, TAKEDA T; KAWABATA Y; SETO H; KOMURA S; GHOSH S.K; NAGAO M, Meeting abstracts of the Physical Society of Japan, 54, (2) 293 - 293, 1999 09 03 |
| 29a-XG-12 Temperature-and pressure-Induced phase transition in a ternary microemulsion, Nagao M.; Seto H.; Kawabata Y.; Okuhara D.; Matsushita Y., Meeting abstracts of the Physical Society of Japan, 54, (1) 726 - 726, 1999 03 15 |
| 29a-XG-11 Pessure induced structural change of water-in-oil microemulsion, Seto H.; Okuhara D.; Nagao M.; Kawabata Y.; Suzuki J.; Takeda T., Meeting abstracts of the Physical Society of Japan, 54, (1) 726 - 726, 1999 03 15 |
| 中性子スピンエコー法による界面活性剤系のダイナミックス--原研JRR3におけるspin echoの経験とその可能性 (「冷中性子スピン干渉実験の進展とその応用(3)」ワークショップ--干渉性研究と冷中性子スピン干渉実験(3)), 瀬戸 秀紀; 武田 隆義; 川端 庸平, KURRI-KR, (35) 17 - 20, 1999 03 |
| Neutron spin echo studies on structural phase transitions induced by temperature and pressure in a ternary microemulsion, M Nagao; Y Kawabata; H Seto; T Takeda; S Komura; Y Matsushita, SLOW DYNAMICS IN COMPLEX SYSTEMS, 469, 1999 |
| NEUTRON SPIN ECHO INVESTIGATIONS ON DYNAMICS IN COMPLEXFLUIDS WITH AMPHIPHILES, TAKEDA T.; KAWABATA Y.; SETO H.; BRULET A.; TEIXEIRA J.; KOMURA S.; GHOSH S.K.; NAGAO M.; OKUHARA D., Meeting abstracts of the Physical Society of Japan, 53, (2) 849 - 849, 1998 09 05 |
| A structural phase transition from droplet to lamellar/bicontinuous in a microemulsion system II.Small-angle X-ray scattering, OKUHARA D.; SETO H.; NAGAO M.; KAWABATA Y.; SUZUKI J.; TAKEDA T., Meeting abstracts of the Physical Society of Japan, 53, (2) 849 - 849, 1998 09 05 |
| 7p-YA-5 Neutron spin echo study of network of worm-like micelles, Seto H.; Kato T.; Takeda T.; Nagao M.; Okuhara D.; Kawabata Y.; Imai M., Meeting abstracts of the Physical Society of Japan, 52, (2) 844 - 844, 1997 09 16 |
Research Grants & Projects
| 日本学術振興会, 科学研究費助成事業, メレンゲ泡界面の量子ビームによる構造可視化を用いた泡沫安定性と物性の改質, 20230401, 20260331, 川端 庸平; 阿久津 和宏; 山田 悟史 |
| Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Intermediate Structures between Lamellar and Onion Phases under Shear Flow and Long-range Orientational Order, 20150401, 20180331, Kato Tadashi; KUGIZAKI SHIORI; SUZUKI KENTO; OHNO KOUSAKU; NASHIMA TAKESHI, Although the transition from the surfactant lamellar phase into the “onion phase” where all the space is filled by multilamellar vesicles has been reported for many systems, conditions of onion formation and the transition mechanism are still unclear. We have performed the following studies by using simultaneous measurements of rheology/small-angle X-ray scattering（rheo-SAXS）and simultaneous measurements of rheology/small-angle light scattering（rheo-SALS) for a nonionic surfactant (C14E5)/water system. (1) Development of a double cylinder cell which can be used both for SAXS and SALS. (2) Determination of a temperature-shear rate diagram and elucidation of three-dimensional structures of the onion phase with a long-range orientational order. (3) Determination of the intermediate structure between lamellar and onion phases formed in the low-shear rate region. |
| Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Conditions and mechanism for onion formation under shear flow, 20110401, 20140331, KATO Tadashi; KOMURA Shigeyuki; KAWABATA Youhei, Although shear-induced lamellar-to-onion transition has been found for many surfactant/water systems, conditions of onion formation and transition mechanism are still unclear. In this study, we have found for the first time that there exist both upper and lower limits for the temperature range of onion formation and that only one of them has been observed so far. We have also derived an expression of the elastic energy for the polyhedral onions to explain the existence of these upper and lower temperature limits. Furthermore, we have found that the change in the orientation of lamellae follows the same path in all the four kinds of transition processes, i.e., the lamellar-to-onion and onion-to-lamellar transitions near the upper and lower temperature limits. |
| Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Morphology of lamellar domain structure in a surfactant aqueous solution, 2009, 2011, KAWABATA Youhei, In a nonionic surfactant aqueous solution, we have investigated the morphology and the formation mechanism of the giant lamellar structures which are formed with crystallization of the hydrophobic group of a surfactant molecule inμm scale, by means of optical microscope, X-ray diffraction and light scattering. We have found that the structure of hydrophilic parts of a surfactant molecule contributes to the formation of the domain morphologies, and that a relatively stable disk-like domain in the case of large head area of the surfactant gradually becomes spherical vesicles because of the unstable structure of its edge part. |
| Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Dynamics of Shear-Induced Structural Transition in Ordered Lyotropic Systems, 2006, 2010, KATO Tadashi; KOMURA Shigeyuki; KAWABATA Youhei; FUJII Masatoshi, Although it has been known that the shear flow induces structural transition in the lyotropic phase (self-assemblies with a long-range order) composed of amphiphiles, the transition mechanism remains still unclear. In this study, we have focused on the transformation of the surfactant lamellar phase into the onion phase where the multilamellar vesicles are close-packed. We have found for the first time the lamellar→onion and lamellar→onion→lamellar transition with increasing temperature under shear flow. |
| Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Effects of Shear Flow on the Structures of Lamellar Liquid Crystals and Slow Dynamics, 2003, 2005, KATO Tadashi; KOMURA Shigeyuki; FUJII Masatoshi; KAWABATA Youhei, In the past 10 years, much attention has been paid to the effects of shear flow on the structure of a lamellar phase. In the present study, we have measured small-angle neutron and X-ray scattering, small-angle light scattering, and shear stress on the lamellar phases of a nonionic surfactant C_nH_<2n+1>(OC_2H_4)_mOH (C_nE_m) in D_2O under shear flow. We have found discontinuous decrease in the lamellar spacing for the shear rate of 0.3-1 s^<-1> suggesting local phase separation into concentrated lamellar and water-rich regions. We have also tried to clarify the mechanism of the local phase separation. The results can be summarized as follows. 1. Construction of an apparatus We have constructed an apparatus for small-angle light scattering and small-angle X-ray scattering measurements under shear flow to investigate structural change in μm scale and nm scale, respectively. 2. Time-resolved small-angle neutron scattering (SANS) and light scattering (SALS) under shear Time evolutions of 2-dimensionl SANS and SALS patterns have been observed after applying shear flow with a constant shear rate. The SANS results indicate discontinuous decrease in the repeat distance a few hours after applying shear flow in the range of shear rate 0.3-3s^<-1>, suggesting some sort of transition. It has been found that the repeat distance in the steady state takes a minimum around 1s^<-1>. From the SALS measurements, on the other hand, structural change in μm scale occurs a few minutes after applying shear flow. The decrease in the repeat distance may be induced by such a structural change in μm scale. At the shear rate of 3s^<-1>, a scattering pattern suggesting formation of the onion phase has been observed. 3. Measurements of shear stress Time evolution of the shear stress has been recorded after applying shear flow with a constant shear rate. In the lower range of shear rte, the shear stress in the steady state increases with increasing shear rate. As the shear rate exceeds about 1s^<-1>, the shear stress decreases with shear rate, supporting the SANS results. |
| 日本学術振興会, 科学研究費助成事業, 中性子スピンエコー法・動的光散乱法を用いた両親媒性分子膜の圧力効果についての研究, 2003, 2004, 川端 庸平, 生体膜やナノスケールの膜構造のモデル系として注目されている、界面活性剤分子の自己集合構造に対する圧力効果を調べ、構造形成要因の解明を目的とした。本研究では、まず(1)前年度開発した高圧容器の改良を行った。この高圧容器は顕微鏡観察に開発されたものであるが、窓材をダイヤモンドに改良することによりX線小角散乱実験が可能となった。さらに、(2)非イオン界面活性剤C16E7/水、C16E6/水系において、紐状ミセルのネットワーク構造を形成する数10%の界面活性剤濃度において、温度を一定の条件下で中性子小角散乱実験を行った。これまでの実験結果から、2000気圧程度の圧力下で長周期の秩序相(ラメラ構造)が出現することが分かっていたが、界面活性剤の疎水基が指組構造のゲル相(水和固体相)であることを初めて見出した。また、ゲル相への相転移曲線が界面活性剤の疎水基と同じ炭素数を持つヘキサデカンの融解曲線と一致し、ゲル相への転移が疎水基の固化によって決まることが明らかとなった。(3)圧力の効果をさらに詳しく調べるために、ミセル相における圧力効果を中性子スピンエコー法により調べた。ミセル相の単位構造(紐状ミセル)は圧力増加で静的構造も動的構造もほとんど変化を示さない一方、高次構造である紐状ミセルのネットワーク構造が圧力増加とともに変化した。構造解析の結果、界面活性剤濃度が濃厚な部分と希薄な部分がμスケールのドメイン構造を形成し、動的構造を特徴付ける緩和速度も小さくなることが分かった。この結果から、圧力増加により疎水性相互作用が増して疎水基間の引力が大きくなったことが示唆され、圧力変化では主に疎水基の圧縮性や疎水基間の疎水性相互作用により構造が変化していくことが明らかになった。 |
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