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Formation of Unique Unilamellar Vesicles from Multilamellar Vesicles under High-Pressure Shear Flow

文献类型： 外文期刊

作者： Shen, Yuwen 1 ; Hoffmann, Heinz 5 ;

作者机构： 1.Shandong Acad Agr Sci, Key Lab Wastes Matrix Utilizat, Minist Agr, Jinan 250100, Shandong, Peoples R China

2.Shandong Acad Agr Sci, Shandong Prov Engn Res Ctr Environm Protect Ferti, Jinan 250100, Shandong, Peoples R China

3.State Key Lab Nutr Resources Integrated Utilizat, Linshu 276700, Peoples R China

4.Kingenta Ecol Engn Grp Co Ltd, Linshu 276700, Peoples R China

5.Univ Bayreuth, BZKG, Gottlieb Keim Str 60, D-95448 Bayreuth, Germany

期刊名称：JOURNAL OF PHYSICAL CHEMISTRY B （ 影响因子：2.991； 五年影响因子：3.051 ）

ISSN： 1520-6106

年卷期： 2018 年 122 卷 37 期

页码：

收录情况： SCI

摘要： Vesicles in surfactant systems are influenced by a shear field. The high shear flow generated by a homogenizer is expected to affect the size of vesicles. Hence, it should be possible to control the size and dispersion of vesicles by tuning the shear. In this study, the influence of shear on the vesicle phase was studied by measuring the rheology and conductivity of a solution made of the nonionic surfactant trideceth-5, a polyethylene glycol ether of tridecyl alcohol with an average number of ethylene oxide of 5, and the anionic surfactant sodium dodecylsulfate. It was found that when shear was applied by a homogenizer, the bilayers of the multilamellar vesicles were stripped off and became unilamellar vesicles, which decreased the viscoelasticity of the system. However, because of the pressure provided by the homogenizer, the newly formed unilamellar vesicles were small and the relative distance between them was large. As a result, the vesicles were no longer crowded and could easily pass each other under shear. This is why the unilamellar vesicles generated by the homogenizer had low viscoelasticity and flow birefringence. Additionally, it time for the unilamellar vesicles to relax back to the original state.

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