In this study, the effects of the three parts of the tobacco stalk: the xylem (TSX), husk (TSH), and core (TSC), on tobacco stalk fiber (TSF)/polypropylene (PP) composites were investigated. The effects of various types of interfacial modifiers and the number of recycled times on the properties of the composites were also explored. The results showed that the TSX reinforced PP composite exhibited better mechanical properties than those of TSH and TSC reinforced composites. The modifier improved the interfacial properties of the composites, and the tensile strengths of TSX/PP, TSH/PP and TSC/PP composites reached up to 32.8, 25.6 and 26.4 MPa in the presence of the modifier. The flexural strengths of TSX/PP, TSH/PP, and TSC/PP composites were 56.0, 46.1, and 48.7 MPa, respectively. Different parts of the tobacco stalk fiber had little effect on the thermal stability and crystallization properties of the compound material. After modification of the composites, their crystallization properties were improved, while there were no significant changes in their thermal stability. After four cycles of crushing and re-injection process, the composite material maintained good mechanical and thermal stability properties, and the interface of the compound material was tightly bonded, indicating that the prepared composites exhibited good reusability properties. Tobacco stalk fiber composite material can replace plastic or wood in decorative building materials, horticultural engineering materials, transportation packaging etc., which can obtain significant economic benefits by not only improving the broader utilization of agricultural and forestry waste but also reducing the use of plastics.

在这项研究中，研究了烟梗的三个部分：木质部 (TSX)、壳 (TSH) 和芯 (TSC) 对烟梗纤维 (TSF)/聚丙烯 (PP) 复合材料的影响。还探讨了各种类型的界面改性剂和循环次数对复合材料性能的影响。结果表明，TSX 增强 PP 复合材料的力学性能优于 TSH 和 TSC 增强复合材料。该改性剂改善了复合材料的界面性能，改性剂存在下TSX/PP、TSH/PP和TSC/PP复合材料的拉伸强度分别达到32.8、25.6和26.4 MPa。TSX/PP、TSH/PP 和 TSC/PP 复合材料的弯曲强度分别为 56.0、46.1 和 48.7 MPa。烟秆纤维的不同部位对复合材料的热稳定性和结晶性能影响不大。复合材料经过改性后，其结晶性能得到改善，而热稳定性没有显着变化。经过四个循环的破碎和再注射过程后，复合材料保持了良好的机械和热稳定性能，复合材料界面紧密结合，表明制备的复合材料具有良好的可重复使用性能。烟秆纤维复合材料在装饰建材、园艺工程材料、交通运输包装等方面可替代塑料或木材，