Rheological Behavior of Worm-Like Micelles in a Mixed Nonionic Surfactant System of a Polyoxyethylene Phytosterol and a Glycerin Fatty Acid Monoester
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概要
- 論文の詳細を見る
In the present study, we examine a worm-like micelle consisting of a nonionic surfactant system of polyoxyethylene phytosterol (PhyEO_m)/glycerin fatty acid monoester (GFA-C_n)/Water (m=10, 20, 30; n=8, 10, 12) using rheological measurements looking towards potential application of the system as a gel base. Phase diagrams in the dilute region of the PhyEO_m/GFA-C_n/Water systems show the formation of worm-like micelles in some of the surfactant combinations. It is thought that the worm-like micelles form with the GFA-C_n solubilized in the palisade layer of a spherical or rod-like micelle consisting of PhyEO_m, resulting in a decrease in the interfacial curvature of the molecular assembly. The rheological properties of micellar solutions were examined while changing the ratio of GFA-C_n (R) with the total concentration of the surfactants (wt%) fixed. Steady-flow viscosity measurements in the region of worm-like micelle formation showed Newtonian flow in the low shear rate region and non-Newtonian flow at higher shear rates. This result shows that the network structure of worm-like micelles does not break in the low shear rate region, but does break in the high shear rate region. The zero-shear viscosity (η_0) was calculated from the steady-flow viscosity curve and was found to change dramatically with changing R value, increasing to a value 10000 times that of other values at the maximum. Thus, there is an optimal composition of surfactants which leads to the greatest entanglement of the worm-like micelles. To consider the change in η_0 in detail, dynamic viscoelasticity measurements were carried out. Consequently, the viscoelastic behavior of the worm-like micelles was found to be similar to the Maxwell model, which represents the most basic model for a viscoelastic body, and it was shown that this worm-like micelle had a single relaxation time. Moreover, it was found that the change in η_0 of a worm-like micelle was influenced by its mechanical strength.
- 社団法人日本薬学会の論文
- 2008-12-01
著者
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Sakai Hideki
Faculty of Science and Technology, Tokyo University of Science
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Abe Masahiko
Faculty of Science and Technology, Tokyo University of Science
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酒井 秀樹
東京理科大学理工学部工業化学科
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HASHIZAKI Kaname
College of Pharmacy, Nihon University
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TAMAKI Nao
College of Pharmacy, Nihon University
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TAGUCHI Hiroyuki
College of Pharmacy, Nihon University
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SAITO Yoshihiro
College of Pharmacy, Nihon University
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TSUCHIYA Koji
Faculty of Science and Technology, Tokyo University of Science
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Shibata Hirobumi
Department Of Materials Science And Technology Faculty Of Industrial Science And Technology Tokyo Un
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Sakai Hideki
Dep. Of Pure And Applied Chemistry Fac. Of Sci. And Technol. Tokyo Univ. Of Sci.
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Saito Yoshihiro
College Of Pharmacy Nihon University
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Tsubaki N
College Of Pharmacy Nihon University
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Tsuchiya Koji
Dep. Of Pure And Applied Chemistry In Fac. Of Sci. And Technol. And Res. Inst. For Sci. And Technol.
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Taguchi Hiroyuki
College Of Pharmacy Nihon University
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Abe Masahiko
Fac. Of Sci. And Technol. Tokyo Univ. Of Sci.
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Abe Masahiko
東京理科大学 理工学部
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Hashizaki K
College Of Pharmacy Nihon University
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Hashizaki Kaname
日本大学 薬学部
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Hashizaki Kaname
Faculty Of Science And Technology Science University Of Tokyo
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Sakai Hideki
Department Of Pharmaceutical Physiology Graduate School Of Medicine And Pharmaceutical Sciences Univ
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Abe Masahiko
Faculty Of Science And Technology Science University Of Tokyo
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Abe Masahiko
Faculty Of Science And Technology Tokyo University Of Science
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Saito Yoshihiro
国立病院機構大阪医療センター 眼科
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酒井 秀樹
東京理科大学
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Taguchi H
Kobe Pharmaceutical Univ. Kobe Jpn
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Sakai H
New Drug Research Laboratories Fujisawa Pharmaceutical Co. Ltd.
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Hashizaki Kaname
College Of Pharmacy Nihon University
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齊戸 美弘
Department Of Ophthalmology Osaka National Hospital
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Abe M
Faculty Of Science And Technology Science University Of Tokyo
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Abe Masahiko
Department Of Pure And Applied Chemistry Tokyo University Of Science
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Saito Yutaka
Osaka University Of Pharmaceutical Sciences:faculty Of Pharmaceutical Sciences Okayama University:ch
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TSUCHIYA Koji
Faculty of Science and Technology, Science University of Tokyo
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SAKAI Hideki
Faculty of Science and Technology, Science University of Tokyo
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