ion transport

The main roads of development in industrially useful solid polymer electrolytes (SPEs) are briefly reviewed. New SPEs based on acrylonitrile copolymers PBAN and PAN and lithium salts LiAsF₆, LiCF₃SO₃, LiCIO₄ have been obtained. The limits of salts solubility in polymer matrix PBAN were established. Ion solvation and ion association processes have been studied by IR spectroscopy. Conducting properties of SPEs were measured at 20-100°C.

It was developed a mathematical model of ion transport in tight junction (TJ) between the membranes of epithelial cells on the basis of nonlocal-electrostatic theory of ion solvation. It is shown that the Na⁺/Cl^- (charge) selectivity in TJ arise due to a combination of two effects: the dielectric exclusion of ions from them and electrostatic displacement Cl^-.