聚乳酸薄膜材料的阻隔性研究进展

目的综述聚乳酸薄膜材料的优缺点和影响其阻隔性的因素及改性技术,为包装(尤其是食品软包装)行业提供理论基础。方法以聚乳酸薄膜材料为主,总结影响聚乳酸阻隔性的自身原因,从物理改性、复合改性、化学改性和表面涂覆处理等方面进行阐述。结果聚乳酸可生物降解,其制备和降解都不会污染环境,但阻隔性差,必须对其进行改性,各种改性方法均有优劣。结论聚乳酸薄膜材料的改性技术仍存在不足,有待开发和完善一种不牺牲材料的生物相容性、设备简单、成本又低的改性技术。

Research Progress of Barrier Properties of Polylactic Acid Film

The work aims to review the advantages and disadvantages of polylactic acid film materials and the factors and modified technology affecting the barrier properties, in order to provide theoretical basis for packaging, especially food flexible packaging industry. Based on polylactic acid film materials, the self-reason for the impact on polylactic acid barrier properties was summarized. The modification method of polylactic acid film was elaborated in such aspects as physical modification, compound modification, chemical modification and surface coating treatment. Polylactic acid was biodegradable, and its preparation and degradation did not pollute the environment, but it needed to be modified because of its poor barrier properties. Various modification methods had their respective advantages and disadvantages. As the modification technology of polylactic acid film material still has some shortcomings, a kind of simple and low-cost equipment without sacrificing the biocompatibility of materials is to be developed and improved.