Optimizing polylactic acid:synthesis,properties,and regulatory strategies for food packaging applications  

作　　者：Peng Sun Kelan Liu Cunjun Dong Li Yan Hongyan Zhu Mingliang Fang Donglei Fu Xinghai Liu 

机构地区：[1]Wuhan Hongzhicai Printing Co.,Ltd.,Wuhan 430040,China [2]Hubei Engineering Technology Research Center of Spectrum and Imaging Instrument,Electronic Information School,Wuhan University,Wuhan 430072,China

出　　处：《Frontiers of Chemical Science and Engineering》2025年第3期69-97,共29页化学科学与工程前沿(英文版)

基　　金：supported by the“14th Five-Year Plan”National Key Research and Development Plan Project(Grant No.2023YFE0105500);support of the collaborative project titled‘Research and Application of High Transparent and High Strength Degradable Polylactic Acid(PLA)Membrane’(Contract No.2023-0166)with Wuhan Hongzhicai Packaging and Printing Company。

摘　　要：Polylactic acid,a biodegradable polymer derived from renewable resources,is increasingly used in food packaging due to its transparency,renewability,and food safety.However,its mechanical properties,heat resistance,and barrier performance present significant challenges that limit its application.Currently,there is a lack of comprehensive literature addressing methods to optimize polylactic acid’s performance for various food packaging application.Hence,this review provides an overview of polylactic acid production processes,including the synthesis of lactic acid and lactide,as well as methods such as polycondensation and ring-opening polymerization.We critically examine the advantages and limitations of polylactic acid in various food packaging contexts,focusing on strategies to enhance its mechanical properties,barrier performance against oxygen and water vapor,surface hydrophobicity,thermal stability,and resistance to ultraviolet light.Furthermore,we summarize recent advancements in polylactic acid applications for food packaging,highlighting innovations in antioxidant,antimicrobial,and freshness indicator packaging.These developments underscore the significant potential of polylactic acid in the food packaging sector and offer valuable insights for future research directions.

关 键 词：polylactic acid biodegradable packaging materials mechanical property barrier property food packaging applications 

分 类 号：TS206.4[轻工技术与工程—食品科学]