Dynamic Electrophoretic Mobility in Concentrated Dispersed Systems. Cell Model

摘要: Electroacoustic characterization of concentrated dispersed systems requires an adequate theory dynamic electrophoretic mobility which takes into account particle-particle interaction. The concept the cell model provides convenient and comprehensive means for creating this theory. There are two different versions electrokinetic model. first one was introduced by Levine Neale, second Shilov Zharkikh. Levine-Neale gives a large discrepancy with experimental data as it shown O'Brien Hunter. We suggest several reasons indicating that Shilov-Zharkikh is more than one. First all, transition to Smolichowski law electroosmosis valid systems. yields symmetrical Onsager relationship between kinetic coefficients well Maxwell-Vagner electric conductivity. In addition, predicts much stronger volume fraction dependence mobility. Such strong corresponds O'Brien-Hunter could not be explained developed using constrains. version only at low frequency, but surface neglects At same time inertia effects makes high frequencies. do address question appropriate frame references All calculations performed in associated liquid.