Attractive interaction between similarly charged colloidal particles

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Journal of Colloid and Interface Science

DOI:https://doi.org/10.1006/jcis.1996.0620· OSTI ID:404606

Chu, X; Wasan, D T ^[1]

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1. Illinois Inst. of Technology, Chicago, IL (United States). Dept. of Chemical Engineering

The pair interactions between the charged colloidal particles dispersed in a solvent are studied theoretically by the integral equation method. The pair potential of the mean forces, accounting for the effective pair interaction between colloidal particles, is calculated from the solution of the Ornstein-Zernike equation with the mean spherical approximation (MSA). An attractive interaction was found between two similarly charged colloidal particles in contrast with the purely repulsive force predicted by the Debye-Huckel theory. Such an attractive interaction provides physical insight for the condensed phenomena in charged colloidal dispersions, that is, the coexistence of a condensed phase and an expanded phase (voids). At the higher concentration and charge on colloidal particles, the effective pair interaction becomes oscillatory.

• OSTI ID: 404606
• Journal Information: Journal of Colloid and Interface Science, Journal Name: Journal of Colloid and Interface Science Journal Issue: 1 Vol. 184; ISSN 0021-9797; ISSN JCISA5
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
COLLOIDS
ELECTROSTATICS
MICELLAR SYSTEMS
PHASE STUDIES
STABILITY
SURFACE POTENTIAL