Oxidation of self-organized nonionic surfactants

被引：22

作者：

Currie, F ^{[1
]}

Andersson, M ^{[1
]}

Holmberg, K ^{[1
]}

机构：

[1] Chalmers Univ Technol, SE-41296 Gothenburg, Sweden

来源：

LANGMUIR | 2004年 / 20卷 / 10期

关键词：

D O I：

10.1021/la0499665

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nonionic surfactants containing a polyoxyethylene headgroup are known to slowly undergo oxidative degradation when exposed to air. The oxidation, which starts by abstraction of a hydrogen atom from a methylene group in a-position to an ether oxygen, is accelerated by metal ions. Silver ion mediated oxidation of a technical grade surfactant of this type, Brij 30, was investigated in two types of self-assembled systems, a water-in-oil microemulsion and a liquid crystalline phase. It was found that in both systems the longer homologues, i.e., the surfactant homologues that carry a longer polyoxyethylene chain, decompose faster than the shorter homologues. This trend was found to be more pronounced when the surfactant is present in a liquid crystal than in a microemulsion. The difference is explained in terms of differences in accessibility of the polyoxyethylene chains to the silver ions.

引用

页码：3835 / 3837

页数：3

共 15 条

[1] Macroscopic alignment of silver nanoparticles in reverse hexagonal liquid crystalline templates [J].