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

Abstract Tannic acid and Fe 3+ 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/Fe 3+ 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.