Polymerizable Anionic Gemini Surfactants: Physicochemical Properties in Aqueous Solution and Polymerization Behavior
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概要
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A novel polymerizable anionic gemini surfactant has been synthesized and the physicochemical properties in aqueous solution have been studied with a combination of various analytical techniques. The surfactant (PA12-2-12) contains two anionic monomeric parts linked with an ethylene spacer and polymerizable methacryloxy groups covalently bound to the terminal of the hydrocarbon chains. The static surface tension data suggest that, when compared with a conventional (non-polymerizable) anionic gemini surfactant (A12-2-12), (i) the interfacial adsorption of PA12-2-12 occurs more effectively from low surfactant concentrations, whereas (ii) a weak interaction of the polymerizable terminal groups with water molecules (and/or the steric hindrance of the polymerizable groups) plays a significant role in the subsequent molecular packing at the air/aqueous solution interface. The latter effect (as well as the electrostatic repulsion between the anionic headgroups) results in a relatively less packed monolayer film, overcoming the strong intermolecular attractive interaction that is frequently seen for gemini surfactant systems. In the region of low added electrolyte concentrations, PA12-2-12 spontaneously forms spherical micelles in aqueous solution, which is confirmed with the Corrin-Harkins analysis (critical micelle concentration (cmc) vs. total counter-ion concentration) and cryogenic transmission electron microscopy (cryo-TEM). The spherical micelles have been polymerized under UV light irradiation in the absence of added electrolytes. Cryo-TEM measurements confirm that no significant change in the original micelle morphology occurs during the polymerization. This offers a possibility that the polymerizable anionic gemini surfactant should be useful as nano-structural organic templates and/or interfacial stabilizers in aqueous solution.
著者
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Tsuchiya Koji
Department Of Cardiovascular Surgery Yamanashi Central Hospital
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Abe Masahiko
Department Of Internal Medicine Hokkaido Prefectural Haboro Hospital
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Sakai Kenichi
Department Of Mathematical And Life Sciences Graduate School Of Science Hiroshima University
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Endo Takeshi
Department Of Biology Faculty Of Science Chiba University
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Sakai Hideki
Department Of Nephro-urology Nagasaki University Graduate School Of Biomedical Sciences
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Matsuda Wataru
Department Of Physical Electronics Tokyo Institute Of Technology
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Takamatsu Yuichiro
Miyoshi Oil & Fat Co., Ltd.
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Wada Miyuki
Department of Pure and Applied Chemistry in Faculty of Science and Technology and Research Institute
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Tsubone Kazuyuki
Miyoshi Oil & Fat Co., Ltd.
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Torigoe Kanjiro
Department of Pure and Applied Chemistry in Faculty of Science and Technology and Research Institute
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Torigoe Kanjiro
Department Of Applied Chemistry And Institute Of Colloid And Interface Science Science University Of
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Tsubone Kazuyuki
Miyoshi Oil & Fat Co., Ltd.
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Torigoe Kanjiro
Department of Pure and Applied Chemistry in Faculty of Science and Technology and Research Institute for Science and Technology, Tokyo University of Science
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Abe Masahiko
Department of Pure and Applied Chemistry in Faculty of Science and Technology and Research Institute for Science and Technology, Tokyo University of Science
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Tsuchiya Koji
Department of Applied Chemistry, Faculty of Science, Tokyo University of Science
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Tsuchiya Koji
Department of Pure and Applied Chemistry in Faculty of Science and Technology and Research Institute for Science and Technology, Tokyo University of Science
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Sakai Hideki
Department of Industrial Chemistry, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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WADA Miyuki
Department of Life Sciences, School of Agriculture, Meiji University
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Wada Miyuki
Department of Pure and Applied Chemistry in Faculty of Science and Technology and Research Institute for Science and Technology, Tokyo University of Science
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Matsuda Wataru
Department of Pure and Applied Chemistry in Faculty of Science and Technology and Research Institute for Science and Technology, Tokyo University of Science
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