聚乳酸改性与应用研究综述

聚乳酸(PLA)是一种完全可降解的高分子材料,且具有良好的力学性能,应用前景广阔;但传统聚乳酸的耐热性、韧性较差,阻隔性也有一定局限.因此,需要对其进行物理、化学改性才能满足应用环境的要求.对乳酸单体的制备以及聚乳酸的合成方法进行了介绍;对聚乳酸的基本性质、阻隔性能、降解性能,以及在包装行业、农业生产、医疗行业中的应用等进行了综述;对聚乳酸的改性方法和改性效果进行了分析.最后对聚乳酸的研究方向和应用前景进行了展望.

Review on Modification and Application of Polylactic Acid

Polylactic acid (PLA) is a kind of polymer material fully degradable with good mechanical properties and broad application prospects. But for the traditional polylactic acid, its heat resistance and toughness are poor, the barrier also has some limitations. Therefore, it is necessary to modify it physically and chemically to meet the requirements of application environment. The preparation of monomer of lactic acid and the synthesis method of polylactic acid were introduced. The basic properties, barrier and degradation properties of polylactic acid, as well as its application in packaging industry, agricultural production and medical industry were reviewed. The modification methods and effects of polylactic acid were analyzed. Finally, the research direction and application prospect of PLA were prospected.