Development of pH-Indicative and Antimicrobial Films Based on Polyvinyl Alcohol/Starch Incorporated with Ethyl Lauroyl Arginate and Mulberry Anthocyanin for Active Packaging

Antibacterial and pH-responsive composite films for active food packaging were fabricated based on polyvinyl alcohol (PVA), cassava starch, ethyl lauroyl arginate (LAE), mulberry anthocyanin. With the incorporation of LAE anthocyanin, PVA/starch blend exhibited a less compact more heterogeneous surface structure. The tensile strength elongation at break not significantly affected when anthocyanin content was than 20%. Moreover, effectively improved UV barrier property films. Notably, while showed obvious color changes in buffer solutions with different pH values, indistinguishable PVA/starch/mulberry By contrast, PVA/starch/LAE/mulberry noticeable, indicating addition increased sensitivity Furthermore, efficiently inhibited growth both Escherichia coli (E. coli) Staphylococcus aureus (S. aureus) due to strong antibacterial activity LAE. According spoilage test, containing 5% indicated slowed down process dairy milk. Our results demonstrate that have high potential as bioactive materials applied industry.