文献类型：期刊文献

英文题名：Counterion-Induced Changes to the Micellization of Surfactin-C₁₆ Aqueous Solution

作者：Li, Yi;Zou, Ai-Hua;Ye, Ru-Qiang;Mu, Bo-Zhong[1]

机构：[1]E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Appl Chem, Shanghai 200237, Peoples R China

年份：2009

卷号：113

期号：46

起止页码：15272

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY B

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000271580700021)】；

基金：We thank Shu-Feng Sun for his help in making FF-TEM samples in the Center for Biological Electron Microscopy, the Institute of Biophysics. Dr. A.-H.Z. gratefully acknowledges the support of this work by the Research Fund for the New Teacher of the Doctoral Program of Higher Education of China (200802511024). This work is also supported by the National Natural Science Foundation of China (50574040) and by the Department of Science and Technology Shanghai(071607014).

语种：英文

摘要：The effects of counterions on surfactin-C-16 micelle solution with its critical micelle concentration (cmc), microenvironment properties in micelles, micelle size distribution, and morphology were investigated by fluorescence, dynamic light-scattering, and freeze-fracture transmission electron microscopy measurements. Counterions enhanced the surface activity of surfactin-C-16 and reduced the cmc. With the micellization of surfactin-C-16, it adopted a beta-sheet conformation, and univalent concentrations reduced micelle micropolarity, increased micelle microviscosity, and tended to cause formation of small and spherical micelles, while divalent counterions had a special effect. With low concentration of divalent cations, they had strong interaction with surfactin-C-16 micelles and tended to form larger micelle aggregates.