改善聚乙烯醇薄膜耐水性的研究进展

发布时间：2018-05-01 14:13

本文选题：聚乙烯醇 + 膜　；参考：《化工进展》2017年07期

【摘要】：聚乙烯醇(PVA)薄膜存在易吸水发生溶胀而出现气体阻隔性和力学性能下降的缺点,不适合用于气体阻隔性和力学性能要求高的场合,因此需要改善它的耐水性。本文首先介绍了评价PVA薄膜耐水性的4种方法和PVA树脂的醇解度与分子量对薄膜耐水性的影响,然后重点述评了改善PVA薄膜耐水性的4种方法,即化学交联法、物理交联法、无机纳米材料复合法和聚合物共混法的机理和研究进展,比较了它们的优缺点。论文还介绍了耐水性PVA薄膜在水的分离纯化、包装、偏振片和生物医学等领域的应用,最后对其未来发展方向做了展望,其中研究新的绿色环保的改性方法,进一步提高PVA薄膜的耐水性,拓展其应用范围是今后值得关注的研究课题。
[Abstract]:PVA film has the disadvantages of gas barrier and mechanical property decline due to water swelling, which is not suitable for high gas barrier and mechanical properties, so it is necessary to improve its water resistance. In this paper, four methods to evaluate the water resistance of PVA thin films and the effects of alcoholysis degree and molecular weight of PVA resins on the water resistance of PVA films are introduced, and then four methods to improve the water resistance of PVA films are reviewed, namely chemical crosslinking method, physical crosslinking method. The mechanism and research progress of inorganic nanocomposite method and polymer blending method are compared, and their advantages and disadvantages are compared. The paper also introduces the application of water-resistant PVA film in the field of water separation and purification, packaging, polarizer and biomedicine. Finally, the future development direction of the film is prospected, among which new modification methods of green and environmental protection are studied. Further improving the water resistance of PVA films and expanding their application range are worthy of attention in the future.
【作者单位】：东华大学纤维材料改性国家重点纤维实验室;
【基金】：国家自然科学基金面上项目(51373030)
【分类号】：TB383.2;TQ325.9

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