Influence of hydration effects on selectivity of modified perfluorinated membranes

Abstract

The concentration dependence of the water content, the specific water capacity, the hydration capacity of the gel phase, the water transport numbers and proton transport numbers were studied in the original and modified Nafion perfluorinated membranes in HCl solutions. The concentration dependences of the macroscopic electrotransport properties of ion-exchange membranes were used for the calculation of the hydration characteristics of their microstructure fragments within the developed model approach to describe the transport of ions and water through the structurally heterogeneous membrane. The effect of modifying additives silica on hydrate and selectivity characteristics of the membrane Nafion was estimated.