Abstract

In a solution containing microions from an added electrolyte, the effective interaction potential between colloidal particles is studied on the basis of the primitive model. The approximation is employed that the correlations of solvent-particles with microions can be neglected, and the potential is calculated with the use of the mean spherical approximation solution of the Ornstein-Zernike equation with the Yukawa closure. In the case of the hydrophobic colloid, the theory is discussed in comparison with the DLVO theory and a role of the solvent-mediated potential is emphasized.

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