PHASE-BEHAVIOR IN MIXTURES OF CATIONIC AND ANIONIC SURFACTANTS IN AQUEOUS-SOLUTIONS

被引：59
|
作者：
FILIPOVICVINCEKOVIC, N
BUJAN, M
DRAGCEVIC, D
NEKIC, N
机构：
[1] Department of Physical Chemistry, 'Ruder Bosković' Institute, Zagreb, 41000
来源：
COLLOID AND POLYMER SCIENCE | 1995年 / 273卷 / 02期
关键词：
CATIONIC ANIONIC SURFACTANT MIXTURES; PHASE BEHAVIOR; CATANIONIC SURFACTANT PRECIPITATION; MIXED MICELLES; COUNTERION BINDING;
D O I：
10.1007/BF00654016
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：
Phase behavior of cationic/anionic surfactant mixtures of the same chain length (n = 10, 12 or 14) strongly depends on the molar ratio and actual concentration of the surfactants. Precipitation of catanionic surfactant and mixed micelles formation are observed over the concentration range investigated. Coacervate and liquid crystals are found to coexist in the transition region from crystalline catanionic surfactant to mixed micelles. The addition of oppositely charged surfactant diminishes the surface charge density at the mixed micelle/solution interface and enhances the apparent degree of counterion dissociation from mixed micelles. Cationic surfactants have a greater tendency to be incorporated in mixed micelles than anionic ones.
引用
收藏
页码：182 / 188
页数：7
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