Electroviscous effect in dilute suspensions of alumina

Abstract:

A study on the electroviscous effect of alumina suspensions has been made. At the low volume fraction of the particles studied here only a first- order effect was detected. Ubbelohde-type capillary viscometers have been used. A simple method to determine the hydrodynamic constant k1 has been proposed. The experimental primary electroviscous coefficients corresponding to different electrolyte concentrations have been compared with two different theoretical approachs (I. G. Watterson, and L. R. White, J. Chem. Soc. Faraday Trans. 2 77, 1115 (1981); F. J. Rubio-Hernandez, E. Ruiz-Reina, and A. I. Gomez-Merino, J. Colloid Interface Sci. 206, 334 (1998)) and the results suggest that the presence of a dynamic Stern layer plays a certain role in this effect. (C) 2000 Academic Press.

Año de publicación:

2000

Keywords:

• Electroviscous effect
• Alumina
• Dynamic stern layer

Fuente:

scopus