Rheological Characterizations of Dispersions of Clay Particles in Viscoelastic Polymer Solutions

Applied Rheology

Bekkour Karim¹  Azouz Kaouther Ben²  Dupuis Dominique² 

[1] Institut de Mécanique des Fluides et des Solides, CNRS-UDS, 2 rue Boussingault, 67000Strasbourg, France;Laboratoire de Physique et Mécanique Textiles, EAC 7189 CNRS-UHA, 11 rue A. Werner, 68093Mulhouse Cedex, France;

关键词: carboxymethyl cellulose;    bentonite;    particle suspension;    rheology;    dispersions;    viscoelasticity;    aging;   

DOI  :  10.3933/applrheol-20-13041

来源: DOAJ

【 摘 要 】

In this work, we consider model fluids which are dispersions of clay particles in aqueous solutions of carboxymethyl cellulose. Their rheological properties are measured in both steady and oscillatory shear flows. We present the experimental results obtained for different polymer concentrations and for three different molecular weights of the polymer. The clay is a bentonite sample and the particle concentration is fixed to a value of 5 %. The mechanical properties of these materials is the result of a competition between different mechanisms: association-dissociation of aggregates of particles, adsorption of polymer on the particles and desorption of solvent molecules from the particles, bridging of the particles by long polymer chains.

【 授权许可】

Unknown