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Multifunctional food packaging polymer composites based on polyvinyl alcohol/cellulose nanocrystals/apple peel extract

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Abstract

Biodegradability and multifunctionality (ultraviolet (UV) shielding and antioxidant/antimicrobial properties) are desirable properties for future food packaging materials. Despite its potential as a biodegradable packaging material, polyvinyl alcohol (PVA) has critical disadvantages like low mechanical strength, poor water vapor/UV barrier, and lack of antioxidant/antimicrobial properties. In this study, cellulose nanocrystals (CNCs) and apple peel extract (APE) were incorporated into a PVA matrix to overcome these limitations. CNCs are expected to improve the mechanical/water vapor barrier properties of the PVA/CNC/APE composite, while APE can provide UV shielding and antioxidant/antimicrobial features. The mechanical strength, water barrier properties, and UV protection factor of the PVA/CNC/APE 20% film (20 wt.% APE in a PVA/CNC matrix containing 5 wt.% CNCs) were improved by factors of 1.39, 1.14, and 4.88, respectively, compared to those of pure PVA film. The antioxidant/antimicrobial activity of PVA/CNC/APE composites was evaluated and demonstrated by 2, 2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) assay, packaging test with fresh pear, and antimicrobial simulation test with fresh milk.

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The datasets generated during and/or analyzed during the current study are available from the corresponding authors upon reasonable request.

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Funding

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2020R1A2C2007603).

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Correspondence to Bong-Kee Lee.

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Van Nguyen, S., Lee, BK. Multifunctional food packaging polymer composites based on polyvinyl alcohol/cellulose nanocrystals/apple peel extract. Cellulose 30, 1697–1716 (2023). https://doi.org/10.1007/s10570-022-04976-x

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  • DOI: https://doi.org/10.1007/s10570-022-04976-x

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