聚乳酸/热塑性淀粉共混物研究进展

Progress of Polylactic Acid/Thermoplastic Starch Blends

聚乳酸(PLA)和热塑性淀粉(TPS)是天然可再生的生物降解材料,由于PLA良好的力学性能与TPS的低成本,二者的共混物具有很好的应用前景。基于已发表的文献,首先对TPS的制备原理和淀粉的增塑改性进行了介绍,然后基于两者之间较弱的界面结合带来的限制,对PLA/TPS共混物的增容机理、增容体系的研究进展进行了综述,并讨论了天然纤维、无机纳米填料等填充物对共混体系性能的影响。随后介绍了目前研究较少的多层膜结构,为PLA/TPS体系提供了新的研究思路。最后对PLA/TPS体系潜在的发展和应用进行了展望。

Polylactic acid(PLA)and thermoplastic starch(TPS)are natural and renewable biodegradable materials.Due to the good mechanical properties of PLA and low cost of TPS,the blending of the two polymers shows high potential.Based on the published literature,first of all,the preparation principles of TPS and plasticizing modification of starch were introduced,and then based on the weak interface bonding between PLA and TPS,the compatibilizing mechanism of PLA/TPS blend and compatibilizing system were summarized.The effects of natural fibers and inorganic nano fillers on the properties of the blend system were discussed.Then,the few studied multilayer structures were introduced,which provided a new research idea for PLA/TPS system.Finally,the potential development and application of PLA/TPS system were prospected.