Cell theory of the electroosmosis in the concentrated diaphragms consisting of spheric particles of colloid dispersity with account of the insoluble boundary layer influence

TL;DR

This paper develops a cell theory model for electroosmosis in concentrated colloidal diaphragms, incorporating boundary layer effects and EDL overlap, to explain experimental observations.

Contribution

It introduces a generalized EDL model considering insoluble boundary layers and analyzes electroosmotic transfer in concentrated systems.

Findings

Electroosmotic transfer depends on particle volume fraction.

The model explains key features of experimental data.

Boundary layer effects significantly influence electroosmosis.

Abstract

The electroosmotic transfer (ratio of velocity of liquid to electric current density) and conductivity of disperse system were calculated as functions of volume fraction of disperse particles. The considered model of electric double layer (EDL) was generalized by taking into account the reducing dissolving ability of liquid near the surface (non-dissolving boundary layer). The problem was solved for limiting case of large degree of EDL overlapping in interparticle space. The obtained results explain the main features of experimental data.