ION-TRANSPORT MEMBRANES BASED ON CONDUCTING POLYMERS

Polypyrrole membranes containing four different dopant ions were prepa red galvanostatically from aqueous solutions of pyrrole (0.1 M) and th e appropriate counter ion salt (0.1 M). The transport of mono-valent c ations through each membrane was achieved by applying a potential grad ient across the membranes. The influence of a number of set up paramet ers on the flux of K+ ions across a PPy/pTS membrane was assessed, as well as the relative selectivities of the four membrane types for the mono-valent cations; Li+, Na+, K+, Rb+ and Cs+.