原位法制备聚乳酸／无机纳米复合材料研究进展

摘要

综述了国内外原位法制备聚乳酸（PLA）／无机纳米复合材料的研究进展，主要包括不同维数的无机纳米填料与PLA的原位复合。着重阐述了原位熔融缩聚法和原位开环聚合法，同时简要介绍了原位沉析法。原位法使无机纳米填料能更好地分散于PLA基体中，用量少，不需要加入其他添加剂也能避免团聚，同时避免了再加工过程中引起的热降解，且制备工艺简单。由于PLA和无机纳米填料界面间的化学键合作用，使得复合材料的热稳定性、玻璃化转变温度（L）、力学性能、降解性能和光学性能等得到了改善，从而拓宽了PLA的应用范围。%The research progress in nanocomposites of poly(lactic acid)and inorganic nano-fillers was reviewed in this paper, with technologies of in-situ polymerization and in-situ precipitation being emphasized. These in-situ methods overcame the problem of aggregation of the nano- particles. The inorganic nano-filler was finely dispersed in and strongly interacted with the polymer matrix so that improved the thermo-stability, glass transition, mechanical properties, optical performance of the composites. And it avoided thermal degradation by a fused. The application of the poly(lactic acid) based the composites was enlarged.