Reverse time effect of surface tension in cationic bolaform surfactant/anionic surfactant mixed systems

被引：17
作者：
Huang, JB [1 ]
Yan, Y [1 ]
Li, ZC [1 ]
Zhao, XL [1 ]
Zhu, BY [1 ]
Ma, JM [1 ]
机构：
[1] Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2003年 / 258卷 / 01期
基金：
中国国家自然科学基金;
关键词：
bolaform amphiphiles; reverse time effect; surface tension;
D O I：
10.1016/S0021-9797(02)00064-4
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 time effect in a series of flexible and rigid bolaform amphiphiles and their mixed systems with oppositely charged conventional surfactants was investigated. An increase of surface tension with time was found in these systems at surfactant concentrations below the crac. This result can be attributed to large numbers of surfactant molecules being gradually adsorbed on the wall of the vessel, which causes great changes of concentration and composition in mixed surfactant solutions. Contact angle data and UV research supported our proposal. It was also found that this reverse time effect in single bolaform cationic surfactant systems is decided by the structure of the hydrocarbon chains and only happens in flexible cationic bolaform surfactant solutions. (C) 2003 Elsevier Science (USA). All rights reserved.
引用
收藏
页码：206 / 210
页数：5
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