木质素含量对PLA基复合材料强韧性的影响

Effect of Lignin Content on Strength and Toughness of PLA-based Composites

聚乳酸(PLA)由于其良好的生物降解性而受到了广泛的应用。但其存在的硬脆等缺点限制了它的应用,而高强度木质素的添加具有赋予聚合物基质硬度的特性。通过在PLA中加入木质素(Lignin)来制备PLA基复合材料,研究不同木质素含量对于PLA基体强韧性变化的影响。通过对于复合材料性能的研究,可以调试并制备出具有最佳强韧性的PLA基复合材料,从而扩大PLA基复合材料的应用范围。

Polylactic acid(PLA)is widely used due to its good biodegradability.However,its shortcomings such as hardness and brittleness limit its application,and the addition of high-strength lignin has the property of imparting hardness to the polymer matrix.In this paper,PLA-based composites are prepared by adding lignin to PLA.The effects of different lignin contents on the strength and toughness of PLA matrix are studied.By studying the properties of composite materials,PLA-based composite materials with the best strength and toughness can be debugged and prepared,thereby expanding the application range of PLA-based composite materials.