The Factor Influencing Hydrodynamic Interaction of Dilute Sodium Montmorillonite Suspension under Dispersed Condition

Abstract

The viscosity of a dilute suspension of sodium montmorillonite was measured as a function of salt concentration using a capillary viscometer, and the effect of salt concentration on the hydrodynamic interaction was discussed on the basis of the experimental results obtained. The hydrodynamic interaction of sodium montmorillonite under dispersed condition depends only on the diffuse double layer, and interaction between clay particles becomes also stronger as the thickness of the diffuse double layer increases. This fact shows that hydrodynamic interaction is caused by the second electroviscous effect.