竹叶/HDPE复合材料的制备及性能

2 种制备工艺下，竹叶/HDPE 复合材料化学性质和热学性质均较稳定。 随竹叶质量分数增加，复合体系中未发生化学反应且未生成新的结晶结构；2 种工艺制备的竹叶/HDPE 复合材料弯曲性能均呈先增大后减小的趋势；当竹叶质量分数为 40%时，2 种工艺下制备的的复合材料弯曲性能均达到最佳；弯曲模量逐渐增大。注塑成型的竹叶/HDPE 复合材料的抗拉模量随竹叶质量分数的增加而逐渐增大，热压成型的竹叶/HDPE 复合材料具有更大冲击强度。综上，热压成型的复合材料力学性能优于注塑成型。热压成型竹叶/HDPE 复合材料是具有更高比强度、更大比刚度且对环境友好的新型材料。

Under both preparation processes, the bamboo leaf/HDPE composites exhibit relatively stable chemical and thermal properties. As the mass fraction of bamboo leaves increases, no chemical reaction occurs and no new crystalline structures are formed in the composite system. The bending properties of the bamboo leaf/HDPE composites prepared by both processes show a trend of first increasing and then decreasing. When the mass fraction of bamboo leaves is 40%, the bending properties of the composites prepared via both processes reach their optimum, and the bending modulus increases gradually. The tensile modulus of injection-molded bamboo leaf/HDPE composites increases gradually with the increase of bamboo leaf mass fraction, while the hot-pressed bamboo leaf/HDPE composites have higher impact strength. In summary, the mechanical properties of hot-pressed composites are superior to those of injection-molded ones. The hot-pressed bamboo leaf/HDPE composites are a new type of environmentally friendly material with higher specific strength and greater specific stiffness.