Preparation and properties of ionically charged lamellar phases that are produced without shearing

被引：52

作者：

Bergmeier, M ^{[1
]}

Hoffmann, H ^{[1
]}

Thunig, C ^{[1
]}

机构：

[1] UNIV BAYREUTH,D-95440 BAYREUTH,GERMANY

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1997年 / 101卷 / 30期

关键词：

D O I：

10.1021/jp971163l

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：

It is shown that an ionically charged L-alpha-phase can be prepared without shear by mixing a small amount of methyl formate to a L-3-phase from alkyldimethyl aminoxide, hexanol, and water. Within a few hours the methyl formate hydrolyzes to formic acid and methanol. The formic acid protonates the aminoxide surfactant head groups and triggers the transformation of the L-3- to the L-alpha-phase. The resulting L-alpha-phase is a low-viscosity classic L-alpha-phase with stacked bilayers. By shearing or simply by shaking of a thus produced sample of low viscosity, it is transformed instantaneously into a highly viscoelastic phase with densely packed multilamellar vesicles. At present, it is not clear which form of the L-alpha-phase is thermodynamically stable.

引用

页码：5767 / 5771

页数：5

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