Attractions in sterically stabilized silica dispersions : IV. Sedimentation

Abstract

The concentration dependence of the sedimentation velocity of sterically stabilized silica particles is measured. With toluene as a solvent this dependence decreases with decreasing temperature. This observation is explained in terms of attractions between the particles. The measured sedimentation coefficients show a behavior in accordance with theory. The temperature dependence parallels that of the osmotic second virial coefficient as measured with light scattering.