氮化碳微米管/聚乳酸保鲜膜在光催化抗菌保鲜中的应用研究

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中图法分类号：S379.2 文献标识码：A 文章编号：1000-2324（2025）04-0547-10

Application ofCarbon Nitride Micron Tube/Polylactic Acid Freshkeeping Film in Photocatalytic Antimicrobial and Freshness Preservation

ZHANG Meng-ting，LIU Shu-jun， JIANG Xiao-kang， FAN Hai*， ZHU Shu-hua* CollegeofhemistryandaterialScience/ShandongAgriculturalUniversityTai'an27o8，China

Abstract：Polylacticacid（PLA）exhibitsexcelent biodegradabilitybutPLAfilmshave thedisadvantagessuchaspoor mechanicalpropertiesandlackofantimicrobialactivity.Inthisstudy，weusePLAas film-formingmatrixandgreen photocatalyst tubularcarbon nitride（TCN）as functionalfillers toprepare composite preservation filmsbysolutioncasting combinedwith thephase transitionmethod.Structural characterizationconfirms thesuccessful fabricationof TCN-PLA films.Mechanical propertiesandgas barierproperties testresultsshowthattheaditionofTCNnearlydoubles thetensile strengthofthefilms，andeffectivelyenhances thegasbarier propertiesand thermalstability.Thefilmmaintainscertain integrityinwaterwhileexhibitingswellingproperties，andtheirdecreasedsurface hydrophilicityisconducivetoinhibit bacterial growthandreproduction.Theantimicrobialexperiments showthatTCN-PLAfilmexhibitsexcelentantimicrobial activity against Escherichia coli and Staphylococcus aureus，with antimicrobial efficiencies of 99.99% and 91.49% respectively.TCN-PLAfilmexhibitsgood preservation performance，maintaining theweight，firmnessandsoluble solids contentofstrawberies for5days.Theseresultsshowthatthe films havecomprehensive functions，includingstrong thermal stability，good mechanical properties，gas barrier properties，antibacterial effects，and presevationcapabilities.

Keywords：Polylactic acid; carbon nitride micron tube; photocatalytic antibacterial; preservation film

果蔬产业的流通范围不断扩大，同时果蔬的损耗量也在不断增加，而储运过程中造成果蔬损失的主要原因是病菌导致的腐烂问题，严重危害了人类身体健康[1]。（剩余12796字）