Antibacterial activity of konjac glucomannan/chitosan blend films and their irradiation-modified counterparts

► Antibacterial activity of KGM/CHI blend films and their irradiated counterparts were tested. ► Antibacterial activity against Escherichia coli and Pseudomonas aeruginosa also increased after the irradiation. ► KC2-25 is a promising biomedical material for its good mechanical properties, biocompatibility.