The effect of acidity on micellization in dodecyldimethylamine oxide-sodium dodecyl sulfate aqueous mixtures

被引：4
|
作者：
Safonova, E. A. [1 ]
Alexeeva, M. V. [1 ]
Smirnova, N. A. [1 ]
机构：
[1] St Petersburg State Univ, Dept Chem, Petrodvorets 198504, Russia
来源：
COLLOID JOURNAL | 2009年 / 71卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
CRITICAL MICELLE CONCENTRATION; DIMETHYLDODECYLAMINE OXIDE; ZWITTERIONIC SURFACTANTS; MIXED MICELLES; LIGHT-SCATTERING; SALT-SOLUTIONS; IONIZATION; BEHAVIOR; PROTONATION; TITRATION;
D O I：
10.1134/S1061933X09050202
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 acidity on micellization in aqueous solutions of dodecyldimethylamine oxide-sodium dodecyl sulfate mixtures is studied. The CMC values are determined for acidic and nonacidified solutions at 50 A degrees C and different ratios of two surfactants. The measurements are taken using potentiometry, conductometry, and tensiometry techniques. The CMC values are calculated within the framework of a quasi-chemical model of micellization modified with regard to the specific features of the system under consideration. Nonacidified solutions are modeled as a mixture of anionic and nonionic surfactants, whereas acidic solutions are treated as a mixture of anionic and cationic surfactants. The results of model calculations are in satisfactory agreement with the experimental data.
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页码：717 / 724
页数：8
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