改性炭纤维增强聚四氟乙烯复合材料的制备

研究了不同处理条件对复合材料拉伸、摩擦性能的影响,并对拉伸断口及磨损表面形貌进行了分析。结果表明,Ar等离子体处理、聚四氟乙烯乳液包覆的炭纤维能有效增大复合材料界面结合力并提高拉伸强度;当处理时间为9 min时,复合材料的拉伸强度为24.3 MPa,断裂伸长率为340%,磨损率为2.4×10-6mm3/N.m;与纯PTFE相比,拉伸强度和断裂伸长率分别提高了48%和100%,磨损率下降55.6%。

Preparation of PTFE Composites Reinforced by Modified Carbon Fiber

The surface modification of carbon fiber by argon plasma was employed to improve the interfacial property between carbon fiber and PTFE matrix.The tensile properties and the wear rate of carbon fiber reinforced polytetrafluoroethylene(PTFE/CF) were investigated,and the tensile fracture and abraded surfaces were analyzed by scanning electron microscope(SEM).Results show that argon plasma surface treatment can effectively improve the tensile properties and the anti-wear ability of the composites.When the treating time is 9 min,the tensile strength is 24.3 MPa,elongation at break is 340%,and the wear rate is 2.4×10-6 mm3/N·m.Compared with the native PTFE,the tensile strength and elongation at break of the composites increases 48% and 100%,respectively,and wear rate decreases 55.6%.