Physical properties and bioactivities of chitosan/gelatin-based films loaded with tannic acid and its application on the preservation of fresh-cut apples

The aim of this research is to develop composite (CG-TA) films by using chitosan (CS)/gelatin (GL)/tannic acid (TA), for fresh-cut apples preservation. TA was used as the crossing-linking agent improve mechanical and barrier properties, active substance anti-ultraviolet antioxidant abilities chitosan/gelatin (CG) film. With incorporation from 0 1 wt%, tensile strength CG film increased while water vapor oxygen permeability were decreased. CG-TA containing more than 0.5 wt% could effectively block most UV light. DPPH radical scavenging assay significant 89.3% when concentration reached 2 wt%. Finally, films, an packaging material, preserve cold-stored apples. Compared with film, obtained better performance on decreasing weight loss, delaying browning degree, inhibiting lipid oxidase activity malondialdehyde content during 10 d storage under 4 °C. Therefore, expected be a new material preserving • prepared chitosan, gelatin tannic acid. properties improved incorporating Tannic addition enhanced bioactivity films. decrease loss suppress