Novel antimicrobial packaging film based on porous poly(lactic acid) nanofiber and polymeric coating for humidity-controlled release of thyme essential oil

The objective of this work is to explore a new pathway develop active packaging materials. Currently, controlled release materials have attracted considerable attention in food applications. In study, the thyme essential oil (TEO) was loaded electrospinning porous poly(lactic acid) (PLA) nanofibers and coated with poly(vinyl alcohol)/poly(ethylene glycol) (PVA/PEG) blends for humidity-controlled TEO release. images scanning electron microscope displayed uniform pores distributed on surface PLA nanofibers. Water contact angle measurement indicated that PVA/PEG coating provided film excellent hydrophilicity. ATR-FTIR spectral analysis supported chemical composition films. antibacterial activities PLA/TEO/PVA/PEG films against Escherichia coli Staphylococcus aureus reached ＞99%. Furthermore, weight loss firmness strawberries packaged novel were evaluated. Finally, vitro behaviors evaluated results demonstrated rate could be by adjusting humidity (20% RH 80% RH).