Ekonol和nano-TiO_2改性聚四氟乙烯的摩擦磨损性能

聚四氟乙烯

【关键词】 聚四氟乙烯; 聚苯酯; 纳米TiO2; 摩擦磨损;
【英文关键词】 PTFE; ekonol; nano-TiO2; friction and wear;
【摘要】 采用纳米TiO2和Ekonol填充改性聚四氟乙烯,研究了复合材料的摩擦磨损性能,并讨论了磨损机理。研究表明:Ekonol含量为20%时,磨损率最低,仅为0.98×10-6mm3/(N·m)。纳米TiO2的存在能够很好地改善10%Ekonol/PTFE复合材料的耐磨性能,纳米TiO2含量为6%时,复合材料的磨损率大大降低,较10%Ekonol/PTFE又降低了27%。SEM分析表明TFE纯样的磨损表面为严重的粘着磨损;Ekonol/PTFE复合材料的磨损表面为轻微的粘着磨损;nano-TiO2/Ekonol/PTFE复合材料的磨损表面出现磨粒磨损和疲劳磨损。
【英文摘要】 The effects of polytetrafluoroethylene(PTFE)-based composites filled with Ekonol and nano-TiO2 on friction and wear properties were studied,and discussed the wear mechanism of composites.The result showed: when Ekonol mass fractions were 20%,the wear rate of Ekonol/PTFE composites was lowest,only 0.98×10-6mm3/(N·m).Nano-TiO2 was good at the abrasive resistance of 10%Ekonol/PTFE composites,when nano-TiO2mass fractions were 6%,the wear rate of nano-TiO2 /Ekonol/PTFE composites was largely decreased,less than ...

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