聚乳酸的阻隔性能改性研究进展

包装材料呈现出多元化发展的同时，产生了大量不可回收、不可降解的塑料垃圾，对生态环境造成了严重危害。聚乳酸（PLA）是一种完全可生物降解的新型高分子材料，其力学性能、生物相容性、可降解性能良好，已成为包装材料研究和应用的热点。但传统PLA的阻隔性能无法满足应用要求，限制了其使用范围。通过提高结晶度与改善晶体形态、聚合物共混、纳米颗粒共混对PLA的阻隔性能进行改性，推动其在各行各业的转化应用。随着改性加工技术的发展，PLA将会在医学材料、包装材料、建筑材料、生活用品等领域得到广泛应用。

Research Progress in Barrier Property Modification of Polylactic Acid

The development in packaging materials shows a diversified trend, while a large number of non-recyclable and non-degradable plastic waste has been produced, causing serious harm to the ecological environment. Polylactic acid (PLA) is a new kind of completely biodegradable polymer material, which has good mechanical properties, biocompatibility and degradability, and has become a hot spot in the research and application of packaging materials. However, the barrier performance of traditional PLA cannot meet the application requirements, which limited its application scope. Therefore, by improving the crystallinity and crystal morphology, polymer blending, nanoparticle blending to modify the barrier properties of PLA, its breakthrough and transformation applications in all walks of life can be promoted. With the development in modification processing technology, PLA will be widely used in medical materials, packaging materials, building materials, daily necessities and other fields.