Gelation of "catanionic" vesicles by hydrophobically modified polyelectrolytes

被引：33

作者：

Ashbaugh, HS ^{[1
]}

Boon, K ^{[1
]}

Prud'homme, RK ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA

来源：

COLLOID AND POLYMER SCIENCE | 2002年 / 280卷 / 09期

关键词：

vesicles; hydrophobically modified polymers; gels;

D O I：

10.1007/s00396-002-0702-3

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 gelation of mixed cationic/anionic surfactant vesicles of sodium dodecyl sulfate/didodecyldimethylammonium bromide and sodium dodecylbenzenesulfonate/cetyltrimethylammonium tosylate by hydrophobically modified sodium polyacrylate is studied rheologically. When the vesicles are cationically charged, mixtures with this anionic polyelectrolyte form precipitates. When the vesicles are anionically charged, however. these mixtures display a progression from a Maxwell fluid to a critical gel to a solid-like gel with increasing vesicle and/or polyelectrolyte concentration. Consideration of the viscous behavior with increasing vesicle and polymer volume fraction indicates that the gel network is formed by the bridging of the hydrophobically modified polymer between vesicles. The similarity between the gelation results for the two anionic systems suggests the results can be generalized to other similarly charged mixtures.

引用

页码：783 / 788

页数：6

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