DC discharge plasma modification of chitosan/gelatin/PLLA films: Surface properties, chemical structure and cell affinity

► We study the effect of air dc-discharge plasma modification of different polymers. ► The novel chitosan/gelatin/PLLA composite was prepared and modified by air plasma. ► Surfaces of model films casted from initial components were modified and studied. ► Plasma treatment of various polymers led to the different change of cell response.