Preparation method of polylactic acid wood material

The invention discloses a preparation method of a polylactic acid wood material. The method comprises the following steps that S1, dried polylactic acid, a toughening agent and foaming microspheres are mixed and stirred uniformly; S2, the mixture obtained after uniform stirring is subjected to melt blending and extrusion at 155-165 DEG C to obtain a toughened foamed microsphere masterbatch. The method has the following advantages that the polylactic acid, the toughening agent and the foaming microspheres are mixed to prepare the toughened foamed masterbatch, the toughened foamed masterbatch and the polylactic acid are subjected to melt blending and extrusion again to obtain the polylactic acid wood material, the polylactic acid wood material has a low foaming ratio during 3D printing, better foaming control is realized, little gas escapes, the final foaming effect is stable, and the color difference of a product obtained after printing is small. 本申请公开了聚乳酸木质材料制备方法，包括如下步骤，S1:将干燥的聚乳酸、增韧剂及发泡微球混合搅拌均匀；S2:将搅拌均匀后的混合物