Plant Oil-based Polymer-Coated Films with Selective Gas Permeability for Efficient Preservation of Perishable Products AITranslate

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DOI：https://doi.org/10.1021/acsapm.3c00568

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About 40–50% of perishable products such as fruits and vegetables are wasted without consumption owing to the short shelf life and uncontrolled storage and transportation conditions. To address this issue, conventional methods including refrigeration, irradiation, controlled atmosphere storage, and surface coatings are often harnessed. However, these methods will probably change both the appearance and flavor of food or give rise to potential safety concerns and health risks. In this work, we have successfully fabricated plant oil-based polymer-coated films as passively modified packaging for the preservation of perishable products. Two Camellia oil-based monomers with N-methyl and amide groups were polymerized to produce various plant oil-based polymers. The obtained plant oil-based polymers present distinct capacity for the formation of hydrogen bonding, leading to tunable gas permeability and selectivity for the films coated with plant oil-based coatings. Good appearance, low water loss, high firmness, and total soluble solid contents were observed for the perishable food when sealed with the plant oil-based polymer-coated films. This method is universal and applicable to different fruits and vegetables either nonclimacteric or climacteric such as cherries, waxberries, tomatoes, and cucumbers. Therefore, passively modified atmosphere packaging films by coating plant oil-based polymers to modulate the CO2/O2 selectivity are a safe and efficient candidate for the preservation of perishable food.