Zheng, Yanli, Jia, Xiaoyu, Zhao, Zhiyong, Ran, Yalin, Du, Meijun, Ji, Haiyu, Pan, Yanfang, Li, Ziqin, Ma, Xiaowei, Liu, Yue, Duan, Lihua, and Li, Xihong
• Biodegradable NTP@PLA film was fabricated by melt processing. • NTP@PLA film exhibited the long-lasting inhibition on Penicillium expansum. • NTP@PLA film displayed biodegradability in soil. • NTP@PLA film displayed a strong control effect on the decay of postharvest grape. Poly (butylene adipate- co -terephthalate) (PBAT)/polylactic acid (PLA) blended with compatibilizers (polycaprolactone, PCL; poly (ethylene glycol), PEG; titanium dioxide, nano-TiO 2) (TP@PLA composites) were developed by melt processing. Natamycin incorporated into TP@PLA blend composites formed NTP@PLA films, which exhibited high tensile strength (24.1–43.5 MPa) and elongation at break (85.8–258.2 %), and exhibited good oxygen permeability, water vapor permeability, surface hydrophobicity and biodegradability. The in vitro results revealed that inhibition of Penicillium expansum cell growth of the NTP@PLA films with addition of 1.0 wt% natamycin reached 95.72 %. The NTP@PLA film with natamycin effectively reduced incidence of decay (1.52 %) on grapes, maintained their quality, and inhibited the growth of pathogenic fungi to up to 0.42 log cfu·g−1. This study generates new insights into the preservation properties of antimicrobial NTP@PLA film, which endow it with great application potential as a novel and eco-friendly packaging material for the food industry. [ABSTRACT FROM AUTHOR]