A study of the interaction of dodecyl sulfobetaine with cationic and anionic surfactant in mixed micelles and monolayers at the air/water interface

被引:38
|
作者
Wydro, P [1 ]
Paluch, M [1 ]
机构
[1] Jagiellonian Univ, Dept Phys Chem & Electrochem, PL-30060 Krakow, Poland
关键词
zwitterionic surfactants; mixed adsorbed films; mixed micelles; Motomura theory; excess free energy of adsorption and micelle formation;
D O I
10.1016/j.jcis.2004.12.039
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 miscibility and interactions between components in mixed adsorbed films and micelles containing zwitterionic (dodecyl sulfobetaine-DSB) and cationic (dodecyltrimethylammonium bromide) or anionic (sodium dodecyl sulfonate) surfactant, respectively, have been investigated. The Molecular interactions have been quantified by the values of the excess free energy of adsorption (Δ G(S, Exc)) and micelle formation (AGM,Exc). The obtained results indicate nonideal behavior of the investigated mixtures since the Values of Δ G(S,Exc) and Δ G(M,Exc) are negative. Moreover, it has been found that DSB interact more strongly with anionic surfactant as compared to cationic surfactant owing to different structure of mixed monolayers and micelles. © 2004 Elsevier Inc. All rights reserved.
引用
收藏
页码:387 / 391
页数:5
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