The influence of different concentration of paraben on properties of chitosan/paraben composite films was studied. The structure characterizations of films were characterized by FT-IR and SEM. Transmittance, color, mechanical properties, water vapor permeability, swelling degree and antibacterial properties were also tested. Results: with the increasing of concentration of paraben, the transmittance of composite film decreased and the color became yellow. The highest tensile strength was 37.0 MPa, and the elongation at the break was 55% when the concentration of paraben were 5%(WT) and 25%(WT), respectively. The water vapor permeability was 7.5×10-14 g/(m2·s·Pa) when concentration of paraben was 5%(WT), in which case composite films witness a good swelling degree and gas barrier property. The antibacterial property of chitosan/paraben composite films on Staphylococcus aureus was better than on Escherichi coli,the maximum value of bacteriostatic circle diameter was 10.8 mm.

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