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

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关键词：TEMPO氧化纤维素纳米纤丝；碳量子点；保鲜薄膜中图分类号：TS7 文献标识码：A DOI：10.11980/j.issn.0254-508X.2025.10.017

Preparation of Cellulose Nanofibril/Camellia oleifera Shells Carbon QuantumDots/PVA Composite Filmsand Their Applications in Fruit Preservation

TANG Xingmei JI Jiao JIANG Hanbing GAO Wenhua*WANG Bin XU Jun ZENG Jinsong

（State KeyLabofAdvancedPapermakingandPaper-based Materials，South China UniversityofTechnology，Guangzhou， Guangdong Province，510640） （*E-mail： segaowenhua@scut. edu. cn）

Abstract：In this study，TEMPO-oxidized celulose nanofibril （TOCNF）with carboxylcontent of O.7，1.2，and 1.6mmol/g ，respectively， werepreparedfrombleachedeucalyptuspulpasrawmaterialbyregulatingtheamountofoxidant.BycombiningTCNFswithvaryingdegrees ofxidatiowithcarbonquanudots（QDs）thatoferothexcellentUVshedingadreinforigproperties，o-friendyosit freshpreservationfilswerepreparedusingacastfilmetodwithpolinylalcoholastesubstrate.hefetsofOC'sodationdgreenthemorphology，structureandpropertiesoftheompositefimseresystematicallinvestigatedTheesultsshowdthatCF andCQDssyergisticallacedeperfanceofompoitefindthopitefiicooratinOCFwitarbooet of 1.2 mmol/g exhibited optimal comprehensive performance：its oxygen transmisson rate decreased by 34. 4% ，tensile strength increased by 239. 0% compared tothefilmwithoutTOCNF，whilemaintaining goodlighttransmitance.Blueberiespackagedwiththiscompositefilm 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.

Key words：TEMPO-oxidized cellulose nanofibril;carbon quantum dots； fresh preservation film

水果因其高含水量和采后持续的生理活动，极易遭受微生物感染，导致品质劣变和货架期缩短，造成经济损失2。（剩余16010字）