Modification of chitosan membrane with poly(vinyl alcohol) and biocompatibility evaluation

► Chitosan had strong interactions with poly(vinyl alcohol) by forming hydrogen bond. ► Adding PVA into chitosan membrane could improve its flexibility and wettability. ► MTS cytotoxicity essay indicated CS/PVA membranes were biocompatible. ► Cells attachment studies showed CS/PVA membranes were biocompatible.