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以杨木粉为填充材料,聚氯乙烯(PVC)为基体材料,添加竹炭和壳聚糖,采用挤出成型制备竹炭和壳聚糖改性木粉/PVC木塑复合材料,采用SEM观察复合材料表面微观形貌,采用综合热分析仪分析复合材料的热稳定性,采用FTIR分析其官能团变化,测试了木粉/PVC木塑复合材料的力学性能。结果表明:复合添加竹炭和壳聚糖可较好地改善木粉和PVC的界面作用力和界面相容性,提高复合材料的力学性能,其拉伸强度、冲击强度、弯曲强度和弯曲模量分别比未添加增加14.6%、28.8%、11.1%和4.85%,且复合材料的微观界面缺陷较少;竹炭可提高复合材料的热稳定性,复合添加竹炭和壳聚糖可增加复合材料中羟基、氨基和亚甲基的数量,减弱碳氯键的结合强度,从而增强复合材料中木粉和PVC的界面结合力。
Using poplar flour as filling material and polyvinyl chloride (PVC) as matrix material, adding bamboo charcoal and chitosan, preparing bamboo charcoal and chitosan modified wood flour / PVC wood-plastic composite material through extrusion molding, adopting SEM observation composite The microstructure of the material surface was analyzed. The thermal stability of the composites was analyzed by a comprehensive thermal analyzer. The functional groups were analyzed by FTIR. The mechanical properties of the composites were tested. The results showed that the addition of bamboo charcoal and chitosan could improve the interfacial and interfacial compatibility of wood flour and PVC, and improve the mechanical properties of the composites. The tensile strength, impact strength, flexural strength and flexural modulus Respectively, than the non-added 14.6%, 28.8%, 11.1% and 4.85%, respectively, and less micro-interface defects of the composites; bamboo charcoal can improve the thermal stability of the composite material, bamboo charcoal and chitosan composite can increase the hydroxyl , The number of amino groups and methylene groups, weakened the bonding strength of carbon-carbon bond, so as to enhance the interfacial bonding between wood flour and PVC in the composites.