文章摘要
石墨/聚四氟乙烯/玻璃纤维改性PA6的力学和摩擦磨损性能
Tribological and Mechanical Properties of Graphite/Polytetrafluoroethylene/Glass Fiber Filled Polyamide 6 Composite
  
DOI:10.16865/j.cnki.1000-7555.2017.08.016
中文关键词: 聚酰胺6  混杂改性  摩擦磨损  力学性能
英文关键词: polyamide 6  hybrid modification  friction and wear  mechanical property
基金项目:中南大学博士后启动经费(149929);益阳市科技计划项目(2015JZ08);湖南省教育厅一般项目(16C0292)
作者单位
游一兰1,2,李笃信3,刘士军1,贺国文2 1. 中南大学 化学化工学院, 湖南 长沙 410083; 2. 湖南城市学院 化学与环境工程学院, 湖南 益阳 413000; 3. 中南大学 粉末冶金研究院, 湖南 长沙 410083 
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中文摘要:
      采用石墨(Gr)、聚四氟乙烯(PTFE)和玻璃纤维(GF)改性聚酰胺6(PA6),以提高PA6的摩擦磨损性能和力学性能。重点研究了填料组合、配比、载荷和转速对复合材料摩擦磨损性能的影响,通过磨损表面形貌分析探讨了摩擦磨损机理。结果表明:Gr/PTFE/GF混杂改性PA6能明显降低摩擦系数并提高耐磨性,PA6/Gr/PTFE/GF质量比为70/5/10/15时摩擦系数和磨损率最低,且在高转速(40N,1500r/min)下摩擦磨损性能更好,摩擦系数为0.08,比PA6降低了27%,磨损率为5.5×10-6 mm3/(N·m),比PA6降低了1个数量级,且该复合材料的拉伸强度、冲击强度、储能模量和损耗模量都高于PA6。
英文摘要:
      To improve the tribological and mechanical properties of polyamide 6(PA6),graphite, polytetrafluoroethylene and glass fiber were incorporated as fillers to fabricate composites. Effect of the variety and proportion of the fillers as well as test condition on the tribological properties were studied. To further understand the wear mechanism, the worn surfaces were examined by scanning electron microscopy. The results reveal that the hybrid fillers graphite/polytetrafluoroethylene/glass fiber (Gr/PTFE/GF) decrease both the friction coefficient and wear rate of PA6 and the PA6/Gr/PTFE/GF composite (mass ratio of 70/5/10/15) shows the best friction-reducing and anti-wear properties, then the tribological properties of this composite seem to be better at the high velocity(40 N, 1500 r/min), the friction coefficient (0.08) is decreased by 27% compared with that of PA6 and the wear rate (5.5×10-6 mm3/(N·m)) is reduced by an order of magnitude. In addition, the tensile strength, impact strength, storage modulus and loss modulus are also raised by hybrid fillers Gr/PTFE/GF with a mass ratio of 5/10/15.
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