Cation exchange membranes refer to the exchange membranes with cations. Cationic membranes are usually of the sulfonic acid type. Cation exchange membrane can be regarded as a kind of polymer electrolyte. Under the action of water molecules, the cations on the positive membrane dissociate into the water, making the positive membrane negatively charged. Cation Exchange Membranes https://ionresins.alfa-chemistry.com/products/cation-exchange-membranes.html