Heteroflocculation in binary colloidal suspensions: Monte Carlo simulations

Citation:

Shih, W. Y. ; Shih, W. H. ; Aksay, I. A. Heteroflocculation in binary colloidal suspensions: Monte Carlo simulations. Journal of the American Ceramic Society 1996, 79, 2587-2591.

Date Published:

Oct

Type of Article:

Article

ISBN Number:

0002-7820

Accession Number:

WOS:A1996VP02100011

Abstract:

We have examined heteroflocculation in binary colloidal suspensions by Monte Carlo simulations based on a diffusion-limited-cluster-aggregation (DLCA) model modified with finite attraction energies, The simulations were performed in two dimensions, Under heteroflocculation conditions, i.e., attraction between unlike particles and repulsion between like particles, cluster size undergoes a maximum as the concentration of the second species of particles is increased, similar to the experimental results in both binary suspensions and suspensions with adsorbing polymers. The initial increase in cluster size at low concentrations of the second species of particles is due to the mutual attraction between unlike particles, The decrease in cluster size at higher concentrations of the sea,nd species of particles is due to the repulsion between the second species of particles, The distinction between heteroflocculation and particulate depletion flocculation is discussed.

Last updated on 07/02/2018