Swelling of Lamellar Gel from Catanionic Hydro- and Perfluoro-Carbon Surfactant Mixtures by Refractive-Index Matching

文献类型： 外文期刊

第一作者： Zhang, Yufeng

作者： Zhang, Yufeng;Fan, Wenjing;Zhang, Changai;Yang, Li;Liu, Zhaohui;Hao, Jingcheng;Hoffmann, Heinz

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关键词： Bilayer swelling;glycerin;refractive index matching

期刊名称：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY （ 影响因子：2.262； 五年影响因子：2.064 ）

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收录情况： SCI

摘要： Bilayer swelling behavior of cationic and anionic surfactant mixtures in solution induced by adding glycerin was investigated. The measurements were performed a system, cationic tetradecyltrimetylammonium bromide (TTABr), and anionic sodium perfluorodecanoate (C_9F_(19)CO_2Na) surfactant mixtures with their stoichiometric mole ratio being exactly 1 in aqueous solution. The non-precipitated phase of cationic and anionic hydro- and perfluoro-carbon surfactant mixtures being the mole ratio of 1:1 could be identified to be lamellar gel phase, which was characterized by freeze-fracture transmission electron microscopy (FF-TEM) and x-ray diffraction (XRD) measurements. Deuterium nuclear magnetic resonance (~2H NMR) and rheology were used to characterize the phase transition from the lamellar gel to smaller vesicles. Phase transition from lamellar gel to smaller vesicles can be induced by adding glycerin to replace water. The addition of glycerin lowers the turbidity of the dispersion and swells the interlamellar distance between bilayers, which could be explained by matching of refractive index between solvent and bilayers.

分类号： O648

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