Preparation of a cellulose-based biomass film with antibacterial and high UV-shielding properties

Plastic pollution, UV radiation and food spoilage have attracted widespread public attention, which will pose a serious threat to the global environment and human health. Therefore, the preparation of renewable, degradable, environmentally friendly packaging materials with antimicrobial activity and UV-shielding properties is urgent. In this work, we describe a simple strategy for the preparation of antimicrobial and UV resistant composite films. Specifically, silver nanoparticles (AgNPs) were synthesized in situ on the surface of cellulose oxide (TOCN) using a one-pot method, and then the folic acid (FA) modified TOCN was blended with silver loaded cellulose oxide (TOCN@AgNPs), and the films were prepared using a vacuum-assisted filtration device. The experimental results showed that the film inhibited both Staphylococcus aureus and Escherichia coli, and at the same time, the film had excellent UV-shielding properties and mechanical strength. Therefore, the film will be an ideal candidate for replacing plastics and extending the shelf life of food. In addition, the method is expected to reduce the environmental impact of plastics. [Display omitted] •Biomass films that are both antimicrobial and UV-shielding have been prepared using cellulose as a substrate.•Graft modification of cellulose oxide with folic acid gives the film the ability to shield against UV light.•AgNPs were prepared on the surface of oxidized cellulose by a one-pot method, giving the films antimicrobial capabilities.•The prepared films have excellent transparency, mechanical properties and flexibility.