The effects of a novel nano-ZnO coated PVC film on physicochemical quality and microbiological changes of fresh-cut ‘Fuji’ apple were evaluated. Fruit decay were efficiently reduced in nano-packing samples. The content of ascorbic acid and total phenolic dropped to 0.2 g•kg-1, 1.2 g•kg-1 in nano-packing samples and 0.02 g•kg-1, 0.6 g•kg-1 in control on day 12. In addition, the nano-ZnO coated PVC film not only inhibited the growth of total aerobic psychrophilic microorganisms, the count of which did not exceed 5 log cfu g−1 FW, but also suppressed the increasing of yeast and mould, the maximum growth of which reached only 3.6 log cfu g−1 in the nano-packing but 6 log cfu g−1 in control.
In this study, we investigated antibacterial activity of zinc oxide (ZnO) nanoparticles coated on polyvinyl chloride (PVC) films against Escherichia. coli both in vitro and in actual test. Results showed that the nano-ZnO coated films displayed excellent inhibition effects on the growth of E. coli and the nano-ZnO particular was contributed to the bactericidal ability. The more amounts of the ZnO particulars the film coated, the greater inhibitory effect it exhibited. The disinfection efficiency with ZnO film is relatively constant at pH values in the range of 4.5 to 8.0. In the actual test, the number of E. coli cells from cut apple stored in a ZnO-coated bag in the dark decreased from 8.72 to 6.3 log CFU/ml after 1 day, while that of an same bag irradiated with light decreased from 8.72 to 3.5 log CFU/ml after 2 days of storage. The results reveal that nano-ZnO coated film has a good promise to make antimicrobial packaging again E. coli and reduce the risks of microbial growth on fresh-cut produce.
In this work, effect of ZnO Nanoparticles on the UV light fastness and climate resistance of PVC film was investigated. The results showed that after 4 h irradiation and 4 times in the cycle system, tensile strength and elongation at break of the ZnO-coated films decreased, but still larger than that of the blank PVC-based films. The analysis of the results revealed that the ultraviolet light fastness and climate resistance of the ZnO-coated PVC film was improved, which may be attributed to the ZnO nanoparticles coated on the surface.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.