INVESTIGADORES
BERLI Claudio Luis Alberto
artículos
Título:
On the viscosity of concentrated suspensions of charged colloids
Autor/es:
CLAUDIO L. A. BERLI, JULIO A. DEIBER, DANIEL QUEMADA
Revista:
LATIN AMERICAN APPLIED RESEARCH
Editorial:
UNS-CONICET
Referencias:
Año: 2005 vol. 35 p. 15 - 22
ISSN:
0327-0793
Resumen:
This work is concerned with the theoretical estimation of the low-shear viscosity of concentrated suspensions of charged-stabilized latex particles. Calculations are based on the assumption that particles interacting through purely repulsive potentials behave as equivalent hard-spheres (HS), and suspension viscosity may be analyzed in the framework of HS systems. In order to predict numerically the HS radius, the pair potential due to double-layer interaction, as a function of particle concentration, was investigated by using Poisson-Boltzmann theory and the cell model. Calculations explain appropriately experimental data for a wide range of particle sizes, volume fractions and salt concentrations. The problem concerning the effective surface charge of latex particles is also discussed.
