The tannin acid /Fe3+ composite film filled with essential oil extracted from Melaleuca bracteata F. Muell leaves for the preservation of mangos

Tannic acid and Fe3+ were used in this study to create a polyphenol-metal network-based composite film for the preservation of Melaleuca bracteata essential oils. The inhibition rate of ABTS and DPPH free radicals reached more than 90% at an essential oil concentration of 20 mg/mL. Additive quantities of 2.0% essential oil nano-emulsion, 0.8% tannic acid/Fe3+ solution, 0.4% microcrystalline cellulose, and 1% chitosan were used to maximize the characteristics of the composite films. When combined with FTIR analysis, X-ray diffraction and scanning electron microscopy revealed that the composite film containing the essential oil emulsion had a more reticulated structure. The essential oil composite layer on mangoes increased the fruit shelf time to 12 days, decreased weight loss by 10.81±4.70%, increased the amount of soluble solids by 2.03±0.31%, and increased the amount of vitamin C by 2.18±0.09%. A trustworthy technical method for the storage and transportation of agricultural goods is offered by this study.