Energy of interaction in colloids and its implications in rheological modeling

DANIEL QUEMADA, CLAUDIO L. A. BERLI

ADVANCES IN COLLOID AND INTERFACE SCIENCE.

Elsevier Science

Año: 2002 vol. 98 p. 51 - 85

0001-8686

This work deals with the problem which consists in deriving theoretical connections between rheology and interparticle forces in colloidal suspensions. In fact, the nature of interparticle forces determine the colloidal structure (crystaline order due to long range repulsive forces, flocculation due to attractive forces, etc.) and hence, the flow behavior of suspensions. The aim of this article is to discuss how these interactions enter the modeling of rheometric functions, in particular, the shear viscosity. In this sense, the main interactions commonly appearing in colloids are reviewed, as well as the role they play in phase transition behavior. Then, a series of approaches relating the interaction potential to viscosity is examined. The results of applying these models to experimental data are also discussed. Finally, examples of viscosity modeling for different interaction potentials are given, by using the structural model proposed previously by the authors.