玻璃纤维/木塑混杂复合材料及其协同增强效应

将固体废弃物中的高密度聚乙烯(HDPE)回收后与废弃的木纤维以及短切玻璃纤维进行复合,成功地制备出混杂型木塑复合材料。研究结果表明,采用长径比较大的L型玻璃纤维增强时,木塑复合材料的弯曲强度、弯曲模量以及冲击强度同时得到提高,而采用长径比较小的玻璃纤维增强时,弯曲性能和冲击强度均呈现下降趋势。玻璃纤维增强木塑复合材料的主要破坏模式为玻璃纤维的拔出、玻璃纤维断裂、界面脱粘等。在玻璃纤维/木纤维/HDPE混杂体系中由于组元之间的协同增强作用,形成了特殊的三维网络结构,木塑复合材料的力学性能得到显著改善。

GLASS FIBER/ WOOD PLASTIC HYBRID COMPOSITES AND THEIR SYNERGISTIC REINFORCING EFFECTS

To fully utilize the resource in the municipal solid waste(MSW),recycled wood plastic hybrid composites(RWPHC) were successfully prepared through compounding of recycled high density polyethylene(HDPE) from MSW,waste wood fibers and short glass fibers.The results show that the flexural strength,flexural modulus and impact strength of RWPHC could be improved simultaneously by adding type L short glass fiber,and would be dropped down when adding type S short glass fiber.The main fracture modes of RWPHC included pullout of glass fiber,broken of glass fiber and interfacial debonding.Because of the synergistic effects between hybrid components in glass fiber/wood fiber/HDPE hybrid system,a special 3-D network architecture was formed,which was the main contribution to the significant improvement in the impact strength of type L glass fiber hybrid composites.