【摘要】 通过M-200型摩擦试验机与SANS微机控制电子式万能试验机，分别对以纳米六方氮化硼（h-BN）、纳米氧化锌（ZnO）、石墨烯粉（GO）、二硫化钨（WS₂）4种不同类型填料改性的聚四氟乙烯（PTFE）复合材料进行摩擦磨损性能和力学性能测试，并使用光学显微镜对摩擦试样表面磨痕微观形貌进行表征。结果表明，4种填料改性的PTFE复合材料摩擦磨损性能和力学性能均有不同程度的提高。在100 N的载荷下，质量分数为5%的ZnO/PTFE材料在干摩擦条件下的磨损率仅5.54×10^-6 mm³/（N·m）,降低了2个数量级；质量分数为25%的GO/PTFE材料在油摩擦条件下的磨损率仅为4.4×10^-7 mm³/（N·m）,降低了2个数量级。质量分数为15%的WS₂/PTFE的拉伸强度为25.01 MPa,与纯PTFE材料拉伸强度相比有提高；质量分数为25%的GO/PTFE拉伸模量达到了2 006 MPa,与纯PTFE相比，提高了201%。更多还原

【Abstract】 The friction and wear properties and mechanical properties of polytetrafluoroethylene（PTFE） composites modified with nano-hexagonal boron nitride（h-BN）, nano-zinc oxide（ZnO）, graphene oxide（GO）, and tungsten disulfide（WS₂）, were tested using an M-200 friction tester and a SANS microcomputer-controlled electronic universal testing machine. The micro-morphology of the wear scars on the friction samples was characterized using an optical microscope. The results showed that the friction and wear properties and mechanical properties of the PTFE composites modified with the four types of fillers were improved to varying degrees. Under a load of 100 N, the wear rate of ZnO/PTFE material with a mass fraction of 5% was only 5.54×10^-6 mm³/（N·m） under dry friction conditions, which decreased by two orders of magnitude; the wear rate of GO/PTFE material with a mass fraction of 25% was only 4.4×10^-7 mm³/（N·m） under oil friction conditions, which also decreased by two orders of magnitude. The tensile strength of WS₂/PTFE with a mass fraction of 15% was 25.01 MPa, which showed some improvement compared to the tensile strength of pure PTFE material; the tensile modulus of GO/PTFE with a mass fraction of 25% reached 2 006 MPa, which was an increase of 201% compared to that of pure PTFE.更多还原