由十二烷基硫酸钠（SDS）和一种带有碳水化合物头部基团的两亲性分子形成的混合胶束。

Mixed micelles formed by SDS and a bolaamphiphile with carbohydrate headgroups.

作者信息

Gerber Sven, Garamus Vasil M, Milkereit Götz, Vill Volkmar

机构信息

Institute of Organic Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany.

出版信息

Langmuir. 2005 Jul 19;21(15):6707-11. doi: 10.1021/la050439a.

DOI:10.1021/la050439a

PMID:16008378

Abstract

The formation of micelles in aqueous mixtures of a carbohydrate-based bolaamphiphile and sodium dodecyl sulfate (SDS) is investigated by surface tension and small-angle neutron scattering. The obtained values of critical micelle concentration (CMC) are analyzed within the framework of regular solution theory. Synergetic interactions between the bolaamphiphile and SDS are observed (parameter beta is negative; a minimum in the plot CMC vs composition). SANS data are collected for mixtures containing protonated and deuterated SDS. This gives us the possibility to conclude that mixed micelles with a homogeneous distribution of surfactant molecules within the micelle are formed. The shape of the micelles is found to be slightly oblate.

摘要

通过表面张力和小角中子散射研究了基于碳水化合物的双亲水基型两亲分子与十二烷基硫酸钠（SDS）的水性混合物中胶束的形成。在正规溶液理论框架内分析了获得的临界胶束浓度（CMC）值。观察到双亲水基型两亲分子与SDS之间的协同相互作用（参数β为负；CMC与组成关系图中有一个最小值）。收集了含有质子化和氘代SDS的混合物的小角中子散射数据。这使我们有可能得出结论，形成了胶束内表面活性剂分子均匀分布的混合胶束。发现胶束的形状略呈扁球形。