An investigation on the high-frequency dielectric dispersion of concentrated ion-exchange resin beads suspensions

In this paper, dielectric measurements were carried out on concentrated suspensions of D₃₅₄ ion-exchange resin (IER) beads dispersed in electrolyte solutions. The distinct high-frequency dielectric behavior occurring in the megahertz frequency range was interpreted based on the understanding of the interparticle interaction and the properties of the constitute phases. The results indicated that the dominant parameter of continuous phase influencing HFDD is the solution concentration after full Donnan equilibrium, while the dominant parameter of dispersed phase influencing HFDD is the fixed charge density. In addition, properties of the dispersed IER beads including electric conductivity and permittivity were obtained in terms of the Hanai’s method.