Good results in strawberry preservation with a PLA nanocomposite packaging film

Different percentages (0%, 1%, 5%, and 10%) of nano-Ag particles were added to polylactic?acid (PLA) to make an active nanocomposite packaging film. Strawberries were packaged by the?nanocomposite films and stored at 4 ? 1??C for 10 days. The freshness of strawberries was assessed?by regularly measuring the physicochemical properties of the strawberries in each packaging film.The difference in the freshness of strawberries was evaluated by determining the following parameter?changes: weight loss, hardness, soluble solids, titratable acid, color, vitamin C, total phenol, free?radical scavenging activity, peroxidase activity, and sensory evaluation. The results revealed that?the active nanocomposite packaging film has better preservation effect when compared with pure?PLA film. Its preservation effect is mainly reflected in the more effective reduction of vitamin C loss,?delaying the decline of total phenols and 1-Diphenyl-2-picrylhydrazyl (DPPH) in strawberries. It also?showed better physical properties. The results showed that the PLA nanocomposite packaging film?could effectively preserve freshness of strawberries. SourcesThe Quality Evaluation of Postharvest Strawberries?Stored in Nano-Ag Packages at?Refrigeration TemperatureCheng Zhang 1, Wenhui Li 1 ID , Bifen Zhu 1, Haiyan Chen 1, Hai Chi 1, Lin Li 2, Yuyue Qin 1,*and Jing Xue 3,*1?Institute of Yunnan Food Safety, Kunming University of Science and Technology, Kunming 650500, China;13136640259@163.com (C.Z.); 15559823733@163.com (W.L.); 18469189957@163.com (B.Z.);seacome@163.com (H.C.); 18468273140@163.com (H.C.)2 College of Food Sciences and Engineering, South China University of Technology,?Guangzhou 510640, China; felinli@scut.edu.cn3 State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China* Correspondence: rabbqy@163.com (Y.Q.); aqua119@163.com (J.X.)Polymers?10(8):894, August 2018DOI: 10.3390/polym10080894https://www.researchgate.net/publication/326955121_The_Quality_Evaluation_of_Postharvest_Strawberries_Stored_in_Nano-Ag_Packages_at_Refrigeration_TemperatureThis article belongs to the Special Issue?Antimicrobial Polymer-Based Materials for Food Packaging Applications Picture Ag nanoparticles by?Vanguardia,?Nanopart?culas de plata, nueva opci?n para combatir el c?ncer ?