Two kinds of ionizable groups, namely, diethylamine and sulfonic acid groups, were introduced into a porous polyethylene hollow fiber membrane by radiation-induced grafting of glycidylmethacrylate(GMA). Anion and cation solutions were permeated throug...
Two kinds of ionizable groups, namely, diethylamine and sulfonic acid groups, were introduced into a porous polyethylene hollow fiber membrane by radiation-induced grafting of glycidylmethacrylate(GMA). Anion and cation solutions were permeated through the pores under a constant permeation, and the changes in both anion and cation concentration of the effluent and the permeation pressure were continuously monitored. The flux of the diethylamine-group-containing hollow fiber membrane maintained with the capture of the anion, whereas the flux of the sulfonic acid-group-containing hollow fiber membrane increased with the capture of cation. Cation was bound in crosslink to the polymer chain based on anion-exchange interaction.