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[1]; Zou, Ai-Hua[1]; Ye, Ru-Qiang[1]; Mu, Bo-Zhong[1]

机构：[1] Laboratory for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, 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：EI(收录号：20094712493591)

语种：英文

外文关键词：Ions - Light scattering - Micellization - Critical micelle concentration - High resolution transmission electron microscopy - Solutions

摘要：The effects of counterions on surfactin-C16 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-C16 and reduced the cmc. With the micellization of surfactin-C16, it adopted a β-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-C16 micelles and tended to form larger micelle aggregates. ? 2009 American Chemical Society.