Chitosan-based films with antioxidant of bamboo leaves and ZnO nanoparticles for application in active food packaging

The function of chitosan film was reinforced by ZnO nanoparticles and antioxidant of bamboo leaves (AOB) for food packaging application. The results of structural characterization indicated the good compatibility among chitosan, ZnO nanoparticles and AOB. The chitosan film had the best mechanical strength and the highest light transmittance. The addition of AOB remarkably reduced the UV light transmittance and significantly enhanced the antioxidant activity of the films. Meanwhile, AOB and ZnO nanoparticles synergistically enhanced the antibacterial activity against E. coli and S. aureus. Our results suggested that the chitosan/ZnO/AOB films could be applied as potential active packaging materials in food industry to extend the shelf-life of packaged food.

Automated summary

The chitosan film reinforced by bamboo leaves antioxidant and zinc oxide nanoparticles showed good compatibility, excellent mechanical strength, high light transmittance, enhanced antioxidant activity, and synergistically improved antibacterial activity, making it a potential active packaging material for extending shelf-life of packaged food in the food industry.