4.7 Article

Carbon dots-based reinforced hydrogen-rich water nanocomposite coating for storage quality of fresh-cut pear

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FOOD BIOSCIENCE
卷 53, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.fbio.2023.102837

关键词

Carbon quantum dots; Hydrogen-rich water; Fresh-cut pear; Nanocomposite coating; Storage quality

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Designing environmentally friendly edible nanocomposite films with antioxidant functions using Pleurotus eryngii carbon quantum dots (PER-CDs) is a promising approach for fresh-cut fruits preservation. The PER-CDs were successfully synthesized from Pleurotus eryngii by-products and incorporated into chitosan (CS)/hydrogen-rich water solution to form CDs/CS nanocomposite films (CS/PER-CDs). The fresh-cut pears treated with CS/2%PER-CDs nanocomposite films showed minimized weight loss, preserved moisture, color, soluble solids, and titratable acids, and maintained good cell membrane integrity.
Designing environmentally friendly edible nanocomposite films with antioxidant functions is of great interest in the field of fresh-cut fruits. Herein, Pleurotus eryngii carbon quantum dots (PER-CDs) were prepared from Pleurotus eryngii by-products, successfully characterized and added to chitosan (CS)/hydrogen-rich water solution to develop CDs/CS nanocomposite films (CS/PER-CDs), which was successfully applied to the preservation of fresh-cut pears. Thereinto, the fresh-cut pears treated with CS/2%PER-CDs nanocomposite films had minimum weight loss of 3.38% and the best retention of moisture, color, soluble solids and titratable acids after 5 days of storage. Importantly, the fresh-cut pears in the CS/2%PER-CDs treatment group had the lowest relative conductivity (37.53%) and MDA content of 1.94 mu mol/kg, which could indicate that the CS/2%PER-CDs nanocomposite films maintained good cell membrane integrity of fresh-cut pears. In addition, the CS/2%PER-CDs treatment group effectively reduced the maximum respiration intensity (51.67 mgCO(2)/Kg center dot h) and ethylene production rate (0.75 mu g/kg center dot h) of fresh-cut pear. Therefore, PER-CDs can be added into chitosan-based coating film as a functional component to make nanocomposite films and applied in fresh-cut fruits preservation effectively.

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