INFLUENCE OF HYDRODYNAMIC INTERACTIONS ON THE KINETICS OF COLLOIDAL PARTICLES ADSORPTION

The kinetics of irreversible adsorption of spherical particles onto fl at surface is theoretically studied. Previous models, in which hydrody namic interactions were disregarded, predicted a power-law behavior t( -2/3) for the time dependence of the coverage of the surface near satu ration. Experiments, however, are in agreement with a power-law behavi or of the form t(-1/2). We outline that, when hydrodynamic interaction s are considered, the asymptotic behavior is found to be compatible wi th the experimental results in a wide region near saturation.