Effect of hydrophobicity of zwitterionic surfactants and triblock polymers on their mixed micelles: A fluorescence study

被引：26

作者：

Bakshi, MS ^{[1
]}

Kaur, G ^{[1
]}

Kaura, A ^{[1
]}

机构：

[1] Guru Nanak Dev Univ, Dept Chem, Amritsar 143005, Punjab, India

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2005年 / 269卷 / 1-3期

关键词：

zwitterionic surfactants; triblock polymers; mixed micelles; fluorescence measurements; hydrophobicity;

D O I：

10.1016/j.colsurfa.2005.06.065

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 pyrene fluorescence measurements of various zwitterionic + triblock polymer surfactant mixtures have been carried out at 25 degrees C. From the variation of I1II3 intensity ratio of pyrene fluorescence, the critical micelle concentration (cmc) and other related micellar parameters of single and mixed surfactants have been determined. The nature of the mixed micelles has been evaluated with the help of regular solution and Motomura's approximations. It has been observed that the magnitude of synergistic mixing of zwitterionic and triblock polymer components in the mixed state is mainly governed by both the hydrophobicity of zwitterionic and triblock polymer components. The synergism reduces with an increase in the hydrophobicity of either of the two or both the components. The origin of synergistic interactions has been attributed to the cationic part of the polar head group repulsions by the intercalation of PEO units of triblock polymers. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：72 / 79

页数：8

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