Viscosity of Polyelectrolytes Solutions in Nanofilms

被引：8

作者：

Delacotte, Jerome ^{[1
]}

Rio, Emmanuelle ^{[1
]}

Restagno, Frederic ^{[1
]}

Uzuem, Cagri ^{[2
]}

von Klitzing, Regine ^{[2
]}

Langevin, Dominique ^{[1
]}

机构：

[1] Univ Paris 11, LPS, CNRS, UMR 8502, F-91405 Orsay, France

[2] Tech Univ Berlin, Inst Chem Stranski Lab, D-10623 Berlin, Germany

来源：

LANGMUIR | 2010年 / 26卷 / 11期

关键词：

FOAM FILMS; POLYMER-FILMS; FORCES;

D O I：

10.1021/la9046676

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We use a thin film pressure balance to probe the rheological properties of thin liquid films. These films are made from mixed aqueous solutions of surfactants and polyelectrolytes. They drain under applied pressure in a noncontinuous way due to a stratification process of the polyelectrolytes network. The stratification kinetics was studied for films stabilized by different surfactants. Using a theoretical model, it is possible to examine the effect of both the surfactant and the film thickness on the local dissipation. On one hand, it was observed that dissipation depends on the polyelectrolyte concentration only, regardless whether the surfactant is neutral or bears electric charges opposite to those of the polyelectrolyte. On the other hand, it was found that dissipation is stronger in thinner films.

引用

页码：7819 / 7823

页数：5

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