| 唐星梅,吉娇,蒋晗冰,高文花,王斌,徐峻,曾劲松.纤维素纳米纤丝/油茶果壳CQDs/PVA复合膜的制备及其在水果保鲜中的应用[J].中国造纸,2025,44(10):150-158 |
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| 纤维素纳米纤丝/油茶果壳CQDs/PVA复合膜的制备及其在水果保鲜中的应用 |
| Preparation of Cellulose Nanofibril/Camellia oleifera Shells Carbon Quantum Dots/PVA Composite Films and Their Applications in Fruit Preservation |
| 收稿日期：2025-06-27 修订日期：2025-07-02 |
| DOI：10.11980/j.issn.0254-508X.2025.10.017 |
| 关键词: TEMPO氧化纤维素纳米纤丝 碳量子点 保鲜薄膜 |
| Key Words:TEMPO-oxidized cellulose nanofibril carbon quantum dots fresh preservation film |
| 基金项目:国家自然科学基金面上项目（31971603）。 |
| 作者 | 单位 | 邮编 | | 唐星梅* | 华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 | | 吉娇 | 华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 | | 蒋晗冰 | 华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 | | 高文花* | 华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 | | 王斌 | 华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 | | 徐峻 | 华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 | | 曾劲松 | 华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 |
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| 摘要:本研究以漂白桉木浆为原料，通过调控氧化剂的用量，分别制备了羧基含量为0.7、1.2和1.6 mmol/g的TEMPO氧化纤维素纳米纤丝（TOCNF）。将不同氧化程度的TOCNF与兼具优异紫外屏蔽性及增强性能的碳量子点（CQDs）复合，并以聚乙烯醇为基底，通过流延法制备了环保型复合保鲜膜。系统探究了TOCNF氧化程度对复合膜形貌、结构和性能的影响。结果表明，TOCNF与CQDs 可协同提升复合膜性能，并且羧基含量为1.2 mmol/g的TOCNF所制备的复合膜性能最佳，其氧气透过率较未添加TOCNF的膜降低34.4%，拉伸强度提升239.0%，同时兼具良好的透光性。使用该膜处理的蓝莓在贮藏7天后无明显腐败，且质量损失率较空白组降低37.8%，有效延缓了蓝莓品质劣变。 |
| 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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