In order to achieve an effective re-utilization of pulp and paper industry waste (PIW), PIW was recycled and used as a filler to prepare green-composites based on linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE), and ultrahigh molecular weight polyethylene (UHMWPE) through an extrusion and injection molding in this study. The resultant green-composites were characterized by infrared spectroscopy, X-ray diffraction, differential scanning calorimetry, thermogravimetry, tension, dynamic mechanical analysis, and micro mechanism. The results showed that the addition of PIW promoted crystallization and improved the thermal stability of LLDPE, HDPE, and UHMWPE. Moreover, the tensile properties of LLDPE, HDPE, and UHMWPE were significantly improved as a result of PIW addition. The best tensile strength of 26.73 MPa and Young's modulus of 1.82 GPa were obtained in PIW/HDPE composites. The dynamic mechanical analysis revealed that the addition of PIW increased the rigidity and elasticity of LLDPE, HDPE, and UHMWPE. The utilization of hazardous PIW in this study not only avoids secondary pollution but also generates green-composites with better thermal and mechanical properties.

为了实现纸浆和造纸工业废物（PIW）的有效再利用，将PIW回收并用作填料，以制备基于线性低密度聚乙烯（LLDPE），高密度聚乙烯（HDPE）的绿色复合材料以及通过挤出和注塑成型的超高分子量聚乙烯（UHMWPE）。通过红外光谱，X射线衍射，差示扫描量热法，热重分析，张力，动态力学分析和微观机理对所得的绿色复合材料进行表征。结果表明，添加PIW可以促进结晶，并改善LLDPE，HDPE和UHMWPE的热稳定性。此外，由于添加了PIW，LLDPE，HDPE和UHMWPE的拉伸性能得到了显着改善。最佳抗拉强度为26.73 MPa PIW / HDPE复合材料的模量为1.82 GPa。动态力学分析表明，添加PIW可以提高LLDPE，HDPE和UHMWPE的刚性和弹性。在这项研究中使用危险的PIW不仅可以避免二次污染，而且还可以产生具有更好的热和机械性能的绿色复合材料。