Irradiation-Grafted Polymeric Films. III. Development of Improved Anion-Selective Membranes for Desalting Water

Experimental anion-selective membranes have been prepared and evaluated as electrodialysis membranes. The membranes were prepared by grafting tertiary amines onto polyethylene films. After grafting, the membranes were made ionic in character by conversion to the corresponding hydrochloride or by quaternizing with 1-bromobutane. Evaluation demonstrated the feasibility of preparing membranes having acceptable transport numbers, dialysis coefficients, and electrical resistances for use in electrodialysis processes.