石墨对聚四氟乙烯（PTFE）抗静电性能的影响

采用冷压成型、热压烧结工艺制备石墨改性聚四氟乙烯（PTFE）复合材料，利用MS—T3000摩擦磨损试验仪和EST102A振动电容式静电计检测摩擦过程中产生的静电电压，并研究了石墨粒径、添加量对PTFE复合材料抗静电性能的影响。试验结果表明，添加石墨可以改善PTFE复合材料的抗静电性能，且添加小粒径石墨（4μm）的效果要明显优于添加大粒径石墨（30μm）的效果，当石墨含量（4μm）为5％时，抗静电性能最优，摩擦过程的静电电压接近于0V。

The Influence of Graphite on the Antistatic Property of PTFE

In this paper, the graphite modified PTFE was prepared by cold press molding and hot press sintering. The electro- static voltage generated during the friction process was tested using MS-T3000 friction and wear tester and EST102A vibrating capacitance electrometer. And then the effect of different size and dosage of graphite on the antistatic property of the PTFE was discussed. The results show that the antistatic property of the PTFE could be improved by adding graphite.And the PTFE composite material which add the small particle size of the graphite （4μm） has better antistatic property than the material which add large particle size of graphite（30μm）. In conclusion, when the content of graphite （4μm） is 5 %, the PTFE composite material has the best antistatic property, and the electrostatic voltage generated during the friction process is close to 0V.