Ion exchange membrane and manufacturing method therefor

A method for manufacturing an ion exchange membrane, comprising the steps of:

• forming a triblock copolymer in which a first sulfonated block, a cross-linking block and a second sulfonated block are arranged sequentially, wherein the cross-linking block is a polyisoprene block;
• hydrogenating a part of the doubles bonds of the cross-linking block;
• sulfonating at least one of the sulfonated blocks;
• carrying out cross-linking of the cross-linking block to obtain a cross-linked sulfonated triblock copolymer;
• and
• dispersing sulfonated carbon nanotubes comprising sulfonates directly attached to a surface of the carbon nanotube to the cross-linked sulfonated triblock copolymer, wherein the sulfonates are present in an amount of 0.1-70 parts by weight based on 100 parts by weight of carbon nanotubes.