Anion exchange membranes based on semi-interpenetrating polymer network of quaternized chitosan and polystyrene

► Preparation of anion exchange membranes with semi-interpenetrating polymer network. ► The semi-IPN membranes of QCS and PS entail high tolerance to alkaline medium. ► Less swelling of the semi-IPN membrane due to the presence of hydrophobic PS. ► Improved stress of the semi-IPN membrane as a result of the semi-IPN.