Nonlinear rheology of Laponite suspensions under an external drive

被引：45

作者：

Abou, B ^{[1
]}

Bonn, D ^{[1
]}

Meunier, J ^{[1
]}

机构：

[1] Ecole Normale Super, UMR CNRS 8550, Lab Phys Stat, F-75005 Paris, France

来源：

JOURNAL OF RHEOLOGY | 2003年 / 47卷 / 04期

关键词：

D O I：

10.1122/1.1574022

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We investigate the nonlinear rheological behavior of colloidal suspensions of Laponite, a synthetic clay, driven by steady homogeneous shear strain. We show that the external drive leads to drastic slowing down of the aging dynamics or even, in some cases, in rejuvenation of the system. Under shear, after a surprisingly long time, the spontaneous aging process observed at rest is suppressed. The system then reaches a nonequilibrium stationary state that is characterized by complex viscosity depending on the shear rate applied. In addition, the glass exhibits non-Newtonian shear-thinning behavior. This rheological behavior confirms recent numerical and theoretical predictions. (C) 2003 The Society of Rheology.

引用

页码：979 / 988

页数：10

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