Mechanism of Concentration-Dependent Vesicle-Micelle Transition in Aqueous Mixture of Cationic and Anionic Surfactants
スポンサーリンク
概要
- 論文の詳細を見る
The phase behavior of aqueous mixed solution of cationic cetyltrimethylammonium bromide (CTAB) and anionic sodium octylsulfate was studied focusing on the concentration-dependent vesicle-micelle transition. Dynamic light scattering measurements and freeze fracture TEM observations showed that the phase transition occurs in two steps depending on the total surfactant concentration. Equilibrium vesicles (V) formed in dilute solution was shown to transform to micelles (M) through a micelle/ small unilamellar vesicle (M+V) coexisting state. The concentration at which the transition from V to M+V occurs on the SOS-rich side lies around the CMC of pure SOS (120 mM). Moreover, electroconductivity and FT-IR measurements revealed that the phase transition is accompanied by a decrease in the degree of counter ion dissociation from surfactant molecules. Based on these experimental findings, the cause of the phase transition was discussed.
- 日本油化学会の論文
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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Tsuchiya Koji
Institute of Colloid and Interface Science, Tokyo University of Science
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OHKUBO Takahiro
Institute of Colloid and Interface Science, Tokyo University of Science
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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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Abe Masahiko
Faculty Of Science And Technology Science University Of Tokyo
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Nakanishi Hisanori
Faculty of Science and Technology, Tokyo University of Science
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Ogura Taku
Faculty Of Science And Technology Tokyo University Of Science
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Ohkubo T
Faculty Of Science And Technology Tokyo University Of Science
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