Abstract：
In recent years, the development of environmentally friendly packaging materials using biodegradable polymers has emerged as a key challenge for scientists and consumers in response to resource depletion and environmental issues caused by plastic packaging materials. Starch and polyvinyl alcohol (PVA) are being recognized as excellent candidates for producing biodegradable food packaging films. Polymer blending has emerged as a practical approach to overcome the limitations of biopolymer films by developing films with unique properties and enhancing overall performance. This review briefly introduces the molecular structure and properties of starch and PVA, summarizes the common preparation methods and properties of starch/PVA blend films, and focuses on different strategies used to enhance starch/PVA blend films, including nanoparticles, plant extracts, and cross-linking agents. Additionally, this study summarizes the application of starch/PVA blend films as active and smart packaging in food preservation systems. This study demonstrates that starch and PVA blends have potential in manufacturing biodegradable food films with excellent properties due to their excellent compatibility and intermolecular interactions, and can be used as packaging films for a variety of foods to extend their shelf life.
摘要：
近年来,开发使用可生物降解聚合物的环保包装材料已成为科学家和消费者应对塑料包装材料引起的资源枯竭和环境问题的关键挑战。淀粉和聚乙烯醇(PVA)被认为是用于生产可生物降解的食品包装膜的优异候选物。聚合物共混已经成为一种实用的方法,通过开发具有独特性质的膜并提高整体性能来克服生物聚合物膜的局限性。本文简要介绍了淀粉和PVA的分子结构和性质,综述了淀粉/PVA共混膜的常用制备方法和性能,并着重于用于增强淀粉/PVA共混膜的不同策略，包括纳米粒子,植物提取物,和交联剂。此外,本研究总结了淀粉/PVA共混膜作为活性和智能包装在食品保鲜系统中的应用。这项研究表明，淀粉和PVA共混物在制造具有优异性能的生物可降解食品薄膜的潜力，由于其优异的相容性和分子间的相互作用，并可用作各种食品的包装膜，以延长其保质期。
