高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (7): 1117.

• 论文 • 上一篇    下一篇

荧光和动态光散射方法研究两性表面活性剂胶束的聚集和相互作用

李方1, 李干佐1, 汪汉卿2, 安英丽3   

  1. 1. 山东大学胶体与界面化学开放实验室, 济南, 250100;
    2. 中国科学院兰州化学物理研究所, 兰州, 730000;
    3. 南开大学吸附与分离功能高分子材料国家重点实验室, 天津, 300071
  • 收稿日期:1997-03-10 出版日期:1998-07-24 发布日期:1998-07-24
  • 通讯作者: 李方,男,30岁,博士,讲师.
  • 作者简介:李方,男,30岁,博士,讲师.
  • 基金资助:

    国家自然科学基金(批准号:29373110)资助课题.

Studies on the Aggregation and Interaction of DDAPS Micelles with Fluorescence and Light-Scattering Methods

LI Fang1, LI Gan-Zuo1, WANG Han-Qing2, An Ying-Li3   

  1. 1. Institute of Colloid and Interface Chemistry, Shandong University, Jinan, 250100;
    2. Institute of Chemical Physics, Academia Sinica, Lanzhou, 730000;
    3. Department of Polymer, Nankai University, Tianjin, 300071
  • Received:1997-03-10 Online:1998-07-24 Published:1998-07-24

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被引次数

48

摘要： 以芘为荧光探针、二苯酮为猝灭剂,利用荧光方法测定了两性表面活性剂N-十二烷基-N,N-二甲基氨基丙磺酸盐(DDAPS)胶束在不同温度和不同NaCl浓度下的聚集数。利用动态光散射方法得到了胶束的水力半径Rh.结果表明,DDAPS的胶束聚集数和Rh值随NaCl浓度的升高略有增大;随温度的升高而稍有下降。DDAPS胶束之间的作用力以排斥力为主。

关键词: N-十二烷基-N, N-二甲基氨基丙磺酸盐, 聚集数, 水力半径, 荧光, 光散射

Abstract: Steady fluorescence and dynamic light-scattering measurement were reported for dodecyldimethylammoniopropanesulfonate(DDAPS)/NaCl aqueous micellar system. The results show that the aggregation number and the hydrodynamic radius of DDAPSmicelles increase slightly with the increasing of NaCl concentration and decrease slightly as the temperature rises. For the zwitterionic surfactant system we infer repulsive intermicellar interactions in spite of the absence of net charges. DDAPSbehaves somewhat like an ionic surfactant. Within the scope of our investigation, DDAPSmicelles exist in spherical shape.

Key words: Dodecyldimethylammoniopropanesulfonate, Aggregation number, Hydrodynamic radius, Fluorescence, Light-scattering

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