Study of the micelle-to-vesicle transition and smallest possible vesicle size by temperature-jumps

被引：4

作者：

Oskolkova, Malin Zackrisson ^{[1
]}

Norrman, Erik ^{[1
]}

Olsson, Ulf ^{[1
]}

机构：

[1] Lund Univ, Dept Chem, SE-22100 Lund, Sweden

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2013年 / 396卷

基金：

瑞典研究理事会;

关键词：

Micelle-to-vesicle transition; Nonionic surfactants; Dynamic light scattering; Temperature jump; SURFACTANT MIXTURES; DYNAMICS; SYSTEMS; FUSION;

D O I：

10.1016/j.jcis.2012.12.070

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：

We have investigated the temperature induced micelle-to-vesicle transition in a binary non-ionic surfactant/water system, for which the spontaneous curvature decreases with increasing temperature. Temperature jumps with variable rate were performed in a microwave oven, from a micellar phase at 5 degrees C to a lamellar phase region at 35 degrees C, passing a liquid-liquid two phase region where dilute and concentrated micellar solutions coexist. It is shown that the obtained vesicle size decreases with increasing heating rate through this two phase region. Moreover, we demonstrate that there exists a minimum vesicle radius, R-nu*, as is also predicted by theory. In the present system we find R-nu* approximate to 50nm, in reasonable agreement with a theoretical estimate. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：173 / 177

页数：5

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