Characterization and formation mechanisms of high tensile strength gliadin films prepared by bi-crosslinking and blending

作者：Jia, Feng; Huang, Yanbo; Hou, Yi; Hu, Song-Qing^*

来源：Food Packaging and Shelf Life, 2023, 37: 101082.

DOI：10.1016/j.fpsl.2023.101082

• Dialdehyde dextrin
• Gliadin film
• Chemical crosslinking
• Blending modification
• Formation mechanisms

Different methods have been used to fabricate gliadin (Gli) films with high tensile strength (TS) and functional performances. In this study, the bi-crosslinked Gli-films were fabricated by Schiff base bonds and disulfide bonds crosslinking to improve their TS and other properties, which were also blended by chitosan (CS). The overall performances of mechanics, water-resistance and stability, barrier, as well as their formation mechanisms, were fully investigated. Results showed that the Gli-films possessed excellent mechanical performances, and CS further improved the TS of Gli-films but decreased their elongation. The bi-crosslinking effect also enhanced the water vapor barrier performance, CO2 barrier performance, water-resistance, and long-term stability in water of Gli-films via both chemical (Schiff base bonds and disulfide bonds) and physical (hydrophobic bonds) cross -linking. These will highlight the applications of plant proteins and provide a theoretical and practical foundation for the fabrication of protein-based packaging with high TS.