纤维/Ekonol/PTFE复合材料的力学与摩擦学性能研究  

Tribological and mechanical properties of fiber/Ekonol/PTFE composites

作　　者：何鹏[1] 冯新[1] 汪怀远[1] 史以俊[1] 陆小华[1] 

机构地区：[1]南京工业大学材料化学工程国家重点实验室,江苏南京210009

出　　处：《功能材料》2007年第12期2044-2047,2051,共5页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2003AA333010);国家自然科学基金资助项目(20246002);国家自然科学重点基金资助项目(20236010)

摘　　要：对比考察了碳纤维(CF)、六钛酸钾晶须(PTW)分别与聚苯酯(Ekonol)混合填充对聚四氟乙烯(PTFE)复合材料的力学与摩擦学性能的影响,并探讨了内部机理。结果表明:PTW相比于传统纤维CF,尺寸细微,具有微区增强特性,PTW的填充提高了Ekonol/PTFE复合材料的致密程度,协助形成更为均匀、致密的转移膜,相比于CF/Ekonol/PTFE复合材料,有着较好的力学性能、摩擦稳定性、耐磨性,进一步改善了Ekonol/PTFE复合材料的综合性能。纤维、Ekonol混合填充PTFE,二者表现出协同润滑与减磨效应。纤维协助均匀、致密的转移膜的形成;而硬质Ekonol颗粒在纤维和对偶之间可能起到了一种第三体滚动效应,避免了纤维受到较为严重的磨损,从而提高复合材料的摩擦磨损性能。The mechanical and tribological properties of CF/Ekonol/PTFE and PTW/Ekonol/PTFE composites have been comparatively investigated. Results show that the combined incorporation of PTW and Ekonol in PTFE improve the comprehensive properties of Ekonol/PTFE composite. The mechanical properties and the ability to reach the steady friction coefficient of PTW/Ekonol/PTFE composites are superior to CF/Ekonol/PTFE composites. This can be explained that PTW,compared with CF, has excellent capacity of micro-reinforcing because of its tiny size, and it increases the internal compactness and reduces the void content of Ekonol/PTFE composites. In addition, PTW can make the transfer film more coherent and uniform than CF, PTW/Ekonol/ PTFE composites are more effective to increase the wear resistance of Ekonol/PTFE than CF/Ekonol/PTFE. The fiber and Ekonol have shown the synergistic effect on the tribological properties. Fiber help in forming an uniform transfer film and infusible rigid Ekonol particles may act as third body abrasive particles to reduce the shear stress at the edge of fiber.

关 键 词：PTFE复合材料 聚苯酯 纤维 摩擦磨损 力学 

分 类 号：TQ174[化学工程—陶瓷工业] TH171.1[化学工程—硅酸盐工业]