Effects of metal ions on the micellization of ionic Surfactants

被引：21
|
作者：
Du, J [1 ]
Jiang, BY [1 ]
Xie, JQ [1 ]
Zeng, XC [1 ]
机构：
[1] Sichuan Univ, Fac Chem, Chengdu 610064, Peoples R China
来源：
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2001年 / 22卷 / 06期
基金：
中国国家自然科学基金;
关键词：
critical micelle concentrations; conductivity method; counterion effect; entropy driving effect;
D O I：
10.1081/DIS-100107751
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of metal ions (Cu(II), Zn(II), Co(II), Ni(II), La(III), Fe(III)) on the critical micelle concentration (CMC) of ionic surfactants (sodium dodecyl sulfate (SDS) and hexadecyltrimethylammonium bromide (CTAB)) were investigated at 25 +/- 0.1degreesC, mu = 0.1 M (KNO3), using conductivity method in this paper A series of general empirical expressions about the relationship between the CMC values for SDS and CTAB and the concentrations of metal ions have been derived. The results showed that the CMC values for both SDS and CTAB decreased with increasing the concentrations of metal ions. This can be intetpreted by the counterion effect and the entropy driving effect.
引用
收藏
页码：529 / 533
页数：5
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