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Phase Transitions of the Liquid–Liquid Type and a Change in the Particle Charge in Colloidal Solutions

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Abstract

The thermodynamic properties are studied for the solutions of charged colloidal particles with ionizable surface groups. The microscopic mechanism of microion binding at surface groups is considered. The free energy of the system in the parameter range where the usual theory of such solutions is inadequate (a range of practical interest) is calculated using the method of the thermodynamic perturbation theory. The first-order phase transition of the liquid–liquid type is shown to be possible; in this phase transition, a phase with a high concentration of colloidal particles that have a higher charge coexists with a phase with a lower concentration of particles that have a lower charge.

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Authors and Affiliations

  1. Department of Physics, Moscow State University, Vorob'evy gory, Moscow, 119899, Russia

    N. V. Brilliantov & V. V. Malinin

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  1. N. V. Brilliantov
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  2. V. V. Malinin
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Brilliantov, N.V., Malinin, V.V. Phase Transitions of the Liquid–Liquid Type and a Change in the Particle Charge in Colloidal Solutions. Colloid Journal 64, 261–269 (2002). https://doi.org/10.1023/A:1015989305560

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