物理化学学报 >> 2011, Vol. 27 >> Issue (05): 1128-1134.doi: 10.3866/PKU.WHXB20110436

软物质 上一篇    下一篇

表面活性素分子结构对其胶束化行为的影响

李翌, 邹爱华, 叶汝强, 牟伯中   

  1. 华东理工大学应用化学研究所, 上海 200237
  • 收稿日期:2010-11-15 修回日期:2011-01-17 发布日期:2011-04-28
  • 通讯作者: 牟伯中 E-mail:bzmu@ecust.edu.cn
  • 基金资助:

    博士点新教师基金项目(200802511024)和上海市国际合作项目(071607014)资助

Effects of Molecular Structure on Surfactin Micellization Activity

LI Yi, ZOU Ai-Hua, YE Ru-Qiang, MU Bo-Zhong   

  1. Institute of Applied Chemistry, East China University of Science and Technology, Shanghai 200237
  • Received:2010-11-15 Revised:2011-01-17 Published:2011-04-28
  • Contact: MU Bo-Zhong E-mail:bzmu@ecust.edu.cn
  • Supported by:

    The project was supported by the Research Fund for the New Teacher of the Doctoral Program of Higher Education of China (200802511024) and Shanghai Municipal Science and Technology Commission, China (071607014).

摘要:

采用表面张力、界面张力、荧光、动态光散射(DLS)和冷冻刻蚀电镜(FF-TEM)等方法, 研究了由Bacillus subtilis HSO121所产生的一组表面活性素的胶束化行为. 通过对表面活性素溶液表面张力、表面活性素对水/正己烷界面张力的影响、表面活性素胶束微极性以及胶束粒径和形态的研究, 发现随着表面活性素脂肪链长度的增加, 其表界面活性增强, 溶液中趋向于形成更大的聚集体.

关键词: 表面活性素, 胶束, 荧光, 动态光散射, 冷冻刻蚀电镜

Abstract:

We produced a group of surfactin isoforms using Bacillus subtilis HSO121. The micellization activity properties such as surface and interfacial tensions, micropolarity, micelle size distribution and morphology of this group of surfactin micellar solutions were investigated by surface and interfacial tension, fluorescence, dynamic light-scattering (DLS), and freeze-fracture transmission electron microscopy (FF-TEM) measurements. With an increase in the chain length, we found that the surface and interfacial activities of the surfactins increased and the surfactins tended to form larger micelle aggregates.

Key words: Surfactin, Micelle, Fluorescence, Dynamic light-scattering, Freeze-fracture transmission electron microscopy

MSC2000: 

  • O648