Nonlinear rheology of Laponite suspensions under an external drive

2003/02/28 by Bérengère Abou, Daniel Bonn, J. Meunier +1 · 2 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Colloid #Homogeneous #Material Dynamics and Properties #Nonlinear system #Rheology #Rheometry #Shear (geology) #Shear thinning #Suspension (topology) #Theoretical and Computational Physics #Viscosity #cond-mat.soft

paper · pdf · doi:10.1122/1.1574022

published as J. Rheol. 47, 979 (2003) · 17 pages, Latex, 6 figures, figures included in the body of the text, to appear in Journal of Rheology

arxiv created 2003/03/24 · openalex publication_date 2003/06/26 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We investigate the nonlinear rheological behavior of colloidal suspensions of Laponite, a synthetic clay, driven by a steady and homogeneous shear strain. We show that the external drive leads to a drastic slowing down of the aging dynamics or even, in some cases, in the 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 non-equilibrium stationary state, characterised by a complex viscosity depending on the applied shear rate. In addition, the glass exhibits a non-Newtonian shear-thinning behavior. These rheological behaviors confirm recent numerical and theoretical predictions.

Citations

• A two-time-scale, two-temperature scenario for nonlinear rheology
• Aging and rheology in soft materials
• Rheological constitutive equation for a model of soft glassy materials
• Models of traps and glass phenomenology
• Higher-order glass-transition singularities in colloidal systems with attractive interactions

Cited by

• Rheological behaviour of aqueous suspensions of laponite: new insights into the ageing phenomena
• Multiple Types of Aging in Active Glasses