CROSSLINKED SULFONATED POLY(ETHER-ETHER-KETONE) CATION EXCHANGE MEMBRANE HAVING IMPROVED CHEMICAL STABILITY BY RADIATION AND METHOD OF PREPARING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a cation exchange membrane usable in a fuel cell membrane, a water treatment membrane and the like and to provided a method of preparing the cation exchange membrane.SOLUTION: A method of preparing a cross-linked sulfonated poly(ether-ether-ketone) cation exchange membrane is provided which comprises: a step of preparing a crosslinker mixture of a first crosslinker containing two or more vinyl oxy groups and a second crosslinker containing three or more vinyl groups; a step of preparing a mother liquid containing the crosslinker mixture, a sulfonated poly(ether-ether-ketone) polymer substituted with sodium, and a solvent; and a step of casting the mother liquid, followed by irradiating the cast mother liquid with radiation.