Liu Baodong, Zhang Jianhua, Guo Hongge
Faculty of Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Institute for Sustainable Industries & Liveable Cities, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia.
Membranes (Basel). 2022 Mar 20;12(3):347. doi: 10.3390/membranes12030347.
Polyvinyl alcohol (PVA) is one of the few biodegradable synthetic resins from petroleum-based sources that can alleviate white pollution in the environment. PVA film materials have excellent properties, such as high barrier, high transparency, high toughness, biocompatibility, and adjustable water solubility. However, due to the presence of hydrophilic hydroxyl groups in the side chain of PVA resin, when PVA film is placed in a humid or water environment, swelling or even dissolution will occur, which greatly limits its application. Therefore, it is necessary to modify PVA resin to improve water resistance without reducing other properties and can also impart various functionalities to it, thereby widening the application range. This paper reviews the water-resistant modification methods of polyvinyl alcohol and the application of water-resistant films and provides an outlook on the development trend of PVA water-resistant films.
聚乙烯醇（PVA）是少数几种可生物降解的石油基合成树脂之一，能够减轻环境中的白色污染。PVA薄膜材料具有优异的性能，如高阻隔性、高透明度、高韧性、生物相容性和可调节的水溶性。然而，由于PVA树脂侧链中存在亲水性羟基，当PVA薄膜置于潮湿或水环境中时，会发生溶胀甚至溶解，这极大地限制了其应用。因此，有必要对PVA树脂进行改性，以提高其耐水性，同时不降低其他性能，还能赋予其各种功能，从而扩大其应用范围。本文综述了聚乙烯醇的耐水改性方法及其耐水薄膜的应用，并对PVA耐水薄膜的发展趋势进行了展望。
