再生型木塑复合材料的研究

为了充分利用城市固体废弃物中的各项资源,本项工作将固体废弃物中的高密度聚乙烯(H igh dens itypo lyethy lene,HDPE)回收后与废弃的木纤维进行复合,成功地制备出再生型木塑复合材料。研究了木纤维长度、含量以及相容剂对木塑复合材料热性能和力学性能的影响。通过扫描电子显微镜观察了复合材料的冲击断口形貌,分析了此类复合材料的断裂机制。结果表明:木纤维的加入使HDPE的结晶温度降低,结晶速度减慢;相容剂的加入大大改善了木纤维与基体树脂之间的界面结合。随着木纤维含量的增加,木塑复合材料的弯曲强度升高,冲击强度下降。

Research on Recycled Plastic Wood Composites

To fully utilize the resources in the municipal solid waste(MSW),recycled wood plastic composites(RWPC) are prepared by compounding of recycled high density polyethylene(HDPE) from MSW and the waste wood fiber.The effect of the length and the content of wood fiber,and coupling agent on the thermal and mechanical properties of RWPC is studied.The fracture surface of the prepared RWPC is observed by scanning electron microscope(SEM) and the fracture mechanism of this kind of composites is analyzed.Results show that the incorporation of the wood fiber in recycled HDPE lowers the crystalline temperature and slows the crystalline speed of the prepared RWPC,the addition of the coupling agent improves the interfacial adhesion between the wood fiber and the matrix.With the increasing of the wood fiber in RWPC,the flexural strength is increased and the impact strength is decreased.