Shear-induced micellar growth in dilute surfactant solutions

被引：45

作者：

Berret, JF

Gamez-Corrales, R

Séréro, Y

Molino, F

Lindner, P

机构：

[1] Univ Montpellier 2, CNRS, Unite Mixte Rech 5581, Grp Dynam Phases Condensees, F-34095 Montpellier 05, France

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

EUROPHYSICS LETTERS | 2001年 / 54卷 / 05期

关键词：

D O I：

10.1209/epl/i2001-00335-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The shear-thickening transition observed in aqueous solutions of cetyltrimethylammonium tosylate (CTAT) is investigated using rheology and small-angle neutron scattering under shear. Above a critical shear rate (gamma )over dot(C), he increase of the apparent shear viscosity is due to the formation of a shear-induced phase. Using a Porod representation to analyze he aggregate local morphology, we demonstrate that the shear-induced viscous state consists of cylindrical micelles strongly aligned in he ow. We also investigate the shear rate and surfactant concentration dependencies of the structure factor peak revealed at low wave vectors. Above (gamma )over dot(C), he systematic shift of he structure factor peak to lower wave vectors is interpreted in terms of he shear-induced micellar growth of he aggregates.

引用

页码：605 / 611

页数：7

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