草莓保鲜膜的制备与性能研究

打开文本图片集

中图分类号：TB33 文献标识码：A DOI： 10.7525/j.issn.1006-8023.2025.03.012

Abstract：Due to the decreasing supplyof petroleumbased plastics resources，thedevelopment of biomassresources has atracted extensive attentionof researchers recently.The research on environmentalfriendlyantibacterial packaging materials has increasingly becomeanew trend.Nanocellulose（CNC）derived from biomass has attracted particular attention.In recent years，nanocellulose hasbeen widelyused in packaging materials，medicalfields，filter mediaand other fields.Itisagoodsubstrate，modifierandaditive.Polylacticacid（PLA）is anenvironmentally friendlyandrenewable polymer，which canbe widelyusedinthefieldoffood packaging toreplace petroleum based plastics.However，its high britlenessand poorantibacterial properties limittheapplicationofPLAinthe fieldof packaging．Inthisstudy，two kinds of polylactic acid/carvacrol/nanocelluluse-zinc oxide（PLA/CRV/CNC-ZnO）composite films with antibacterial effect were successfully prepared by solution casting and electrospinning.The efects ofCRVand CNC-ZnO hybrid on he propertiesofthecomposite films were studied.Atthe same time，two kindsofcompositefilms were appliedtostrawberry preservation experiment to explore their preservation efect on strawberry.The PLA/CRV20%/CNC-ZnO3%composite film prepared by solvent casting method and F-PLA/CRV20%/CNC-ZnO3% composite film prepared by electrospinning method wereused to freshen strawberries inthesame environment，andthe fresh-keeping efectof strawberries was evaluatedbysensoryevaluation，weight lossrateandother tests，andthe efects of packagingfilms preparedbydifferent processes onthefresh-keeping effctofstrawberries were comparedandanalyzed.Theresultsshowedthatbothcasting film

ZHANGY，CUD.PreparationdpropertiesstudyofstrawberryingfimJ].FrestEngineering2025，41（3）：64 and spinning film had better preservation efect onstrawberry，and the preservation effect ofF-PLA/CRV20%/CNCZ n O3 % spinning film on strawberry was better than P L A/ C R V2 0 % / C N C - Z n O3 % casting film，and the shelf life of strawberry was successfully extended to 10 days at . This study has a certain guiding role in expanding the application of PLA composite film in antibacterial food packaging.

Keywords：Polylacticacid；carvacrol；nanocellulose zinc oxide；composite membrane；antibacterial activity

0 引言

近年来，我国食品工业发展迅猛，食品变质腐烂的问题受到人们的广泛关注。（剩余15803字）