Development of antimicrobial gelatin films with boron derivatives

Abstract

Food packaging technology has been advancing to provide safe and high quality food products and to minimize foodwaste. Moreover, there is a dire need to replace plastic materials in order to reduce environmental pollution. The aim of this studywas to prepare biodegradable antimicrobial packaging films from gelatin. Boric acid, disodium octaborate tetrahydrate, and sodiumpentaborate were incorporated as the antimicrobial agents. Films containing boric acid and its salts showed antibacterial effect againstStaphylococcus aureus and Pseudomonas aeruginosa, as well as antifungal and anticandidal effects against Aspergillus niger and Candidaalbicans. The mechanical strength of the films was mostly enhanced by the addition of boron derivatives. The rheological measurementsand Fourier-transform infrared spectroscopy results suggest that boron derivatives did not interfere with the network formation duringgelling. The morphology of boron-added antimicrobial films was found to be similar to the morphology of the control. In conclusion,the newly developed gelatin films containing 10% or 15% disodium octaborate (g/g gelatin) might be good candidates for biodegradableantimicrobial packaging materials.