Polymer effects on the equimolar mixed cationic-anionic surfactants

被引：10
|
作者：
Yan, P [1 ]
Chen, L [1 ]
Wang, C [1 ]
Xiao, JX [1 ]
Zhu, BY [1 ]
Zhao, GX [1 ]
机构：
[1] Peking Univ, Inst Phys Chem, Beijing 100871, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2005年 / 259卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
catanionic surfactants; vesicles; polyethylene oxide; polymer-surfactant interaction; Asakura-Oosawa model;
D O I：
10.1016/j.colsurfa.2005.02.021
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：
Interactions between poly(ethylene oxide) (PEO), and equimolar mixed sodium decylsuffonate and decyltriethylammonium bromide were studied using surface tension, fluorescence, dynamic light scattering and freeze-fracture transmission electron microscopy techniques. Below the cmc of the equimolar mixed cationic-anionic surfactants, no obvious interaction was observed under the experimental conditions. However, PEO had dramatic effects on the morphology of the aggregates of the equimolar mixed cationic-anionic surfactants. Spontaneous, stable and narrow distributed vesicles could be prepared by mixing PEO and equimolar mixed cationic-anionic surfactants. Furthermore, the size of the vesicles could be controlled by turning the total surfactant concentration, PEO concentration and PEO molecular weight. We found the effect of PEO on the vesicles could be explained by the Asakura-Oosawa model. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：55 / 61
页数：7
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