环氧树脂/氟化碳纳米管复合材料的制备与性能

Preparation and Properties of Epoxy/Polytetrafluoroethylene Functionalized Carbon Nanotubes Composites

用聚四氟乙烯对碳纳米管(CNTs)进行氟化改性,制备了氟化碳纳米管(F-CNTs),并采用超声分散法和模具浇注法制备了环氧树脂(EP)/F-CNTs复合材料。采用红外光谱、X射线衍射对F-CNTs进行了表征,并利用透射电子显微镜观察了F-CNTs在丙酮中的分散情况。研究了不同含量的F-CNTs对EP/F-CNTs复合材料的冲击性能、弯曲性能的影响。结果表明,在CNTs表面生成了C—F键,成功地制备了F-CNTs,使CNTs之间的缠结团聚现象得到明显改善,提高了CNTs在有机溶剂中的分散性;当F-CNTs含量为1.5%(质量分数,下同)时,材料的冲击强度和弯曲强度最高,分别为25.90kJ/m2、128.3 MPa。

Carbon nanotubes(CNTs)were functionalized by polytetrafluoroethylene and the epoxy/fluorinated CNTs(F-CNTs)composites were prepared by ultrasonication and mold casting method.The raw CNTs and F-CNTs were characterized using FTIR,XRD,and TEM.It was found that C—F bonds were created on the side wall of CNTs.The F-CNTs could form stable suspension in organic solvents,which disperse easily in polymers.The impact and flexural strengths of F-CNTs/epoxy composites with different content of F-CNTs were investigated.When the content of F-CNTs was 1.5 %(mass content),the impact and flexural strengths were25.90kJ/m2 and 128.3 MPa,respectively.