碳纳米管/芳纶纤维复合增强PVC材料的性能研究

Properties of CNTs/PPTA Fiber Reinforced PVC Composites

通过共价及非共价结合方式制备2种碳纳米管/芳纶纤维(CNTs/PPTA和CNTs-NH2/PPTA)复合材料,并用作聚氯乙烯(PVC)薄膜的增强体,利用透射电镜、扫描电镜、光学显微镜等对2种碳纳米管/芳纶纤维复合材料的表面形貌进行表征,并对PVC薄膜进行力学性能研究。结果表明:共价结合碳纳米管复合材料在PVC基体中分散性优于非共价结合碳纳米管复合材料;在碳纳米管分散良好的情况下,当CNTs-NH2/PPTA质量分数为0.25%时,PVC薄膜的断裂伸长率最高可达800%。

Two kinds of composites of carbon nanotubes/poly-p-phenylene terephthamide fiber （CNTs/PPTA and CNTs-NH2/PPTA） were prepared by covalent and noncovalent binding methods and used as reinforcements for polyvinyl chloride （PVC） film. The surface morphology of CNTs/PPTA and CNTs-NH2/PPTA composites was characterized by transmission electron microscopy （TEM）,scanning electron microscope （SEM）, and optical microscope, and the mechanical properties of PVC film also were studied. The results show that the dispersion of the covalently bonded CNTs composites in the PVC matrix is better than that of the non-covalently bonded CNTs composites. When the mass fraction of CNTs-NH2/PPTA is 0. 25% under the condition of decentral- ized carbon nanotubes, the elongation at break of PVC film is up to 800%.