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| Preparation of Cellulose Nanofibril/Camellia oleifera Shells Carbon Quantum Dots/PVA Composite Films and Their Applications in Fruit Preservation |
| Received:June 27, 2025 Revised:July 02, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.10.017 |
| Key Words:TEMPO-oxidized cellulose nanofibril carbon quantum dots fresh preservation film |
| Fund Project:国家自然科学基金面上项目（31971603）。 |
| Author Name | Affiliation | Postcode | | TANG Xingmei* | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | JI Jiao | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | JIANG Hanbing | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | GAO Wenhua* | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | WANG Bin | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | XU Jun | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | ZENG Jinsong | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:In this study， TEMPO-oxidized cellulose nanofibril (TOCNF) with carboxyl content of 0.7， 1.2， and 1.6 mmol/g， respectively， were prepared from bleached eucalyptus pulp as raw material by regulating the amount of oxidant. By combining TOCNFs with varying degrees of oxidation with carbon quantum dots (CQDs) that offer both excellent UV shielding and reinforcing properties， eco-friendly composite fresh preservation films were prepared using a cast film method with polyvinyl alcohol as the substrate. The effects of TOCNF’s oxidation degree on the morphology， structure， and properties of the composite films were systematically investigated. The results showed that TOCNF and CQDs synergistically enhanced the performance of composite film， and the composite film incorporating TOCNF with a carboxyl content of 1.2 mmol/g exhibited optimal comprehensive performance： its oxygen transmission rate decreased by 34.4%， tensile strength increased by 239.0% compared to the film without TOCNF， while maintaining good light transmittance. Blueberries packaged with this composite film showed no obvious decay after 7 days of storage， and the mass loss rate was reduced by 37.8% compared to the blank group， effectively delaying quality deterioration. |
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