纳米和微米TiO_2颗粒对PTFE/PEEK复合材料摩擦学性能的影响  

Effects of nano-and micro-TiO_2 on polytetrafluoroethylene/polyethertherketone composites' tribological performance

作　　者：穆立文[1,2] 梅书琴 周忠鑫 吴健[3] 冯新[3] 

机构地区：[1]南京工程学院江苏省先进结构材料与应用技术重点实验室,江苏南京211167 [2]南京工程学院材料工程学院,江苏南京211167 [3]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：《南京工业大学学报（自然科学版）》2014年第6期31-36,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点基础研究发展计划(973计划)(2013CB733501);国家自然科学基金(21176112;51005123);江苏高校优势学科建设工程;南京工程学院引进人才启动基金(YKJ201309);江苏省高等学校大学生实践创新训练计划(201411276047X);南京工程学院大学生科技创新基金(N20140205)

摘　　要：研究不同体积分数纳米和微米TiO2填充聚四氟乙烯/聚醚醚酮(PTFE/PEEK)复合材料的摩擦学性能,考察载荷、滑动速率对复合材料摩擦学性能的影响。结果表明:纳米和微米TiO2均有助于提高PTFE/PEEK复合材料的摩擦学性能,当TiO2体积分数为1%时,TiO2/PTFE/PEEK复合材料具有最佳摩擦学性能。1%纳米TiO2填充PTFE/PEEK复合材料的磨损率仅为PTFE/PEEK复合材料的50%左右和1%微米TiO2/PTFE/PEEK复合材料的70%。此外,在相同的试验条件和填充比例时,纳米TiO2填充PTFE/PEEK复合材料比微米TiO2填充的复合材料表现出更好的减摩、抗磨性能以及更低的接触面温度。扫描电子显微镜照片显示:1%纳米TiO2有助于PTFE/PEEK复合材料形成均匀、光滑的转移膜,并减少PTFE/PEEK复合材料的黏着磨损。The tribological performance of volume fraction of nano-TiO2 and micro-TiO2 filled polytetrafluoroethylene / polyethertherketone（ PTFE / PEEK） composites was studied,and the influences of various loads and sliding speeds on the tribological performance were also investigated. Results showed that nano-TiO2 and micro-TiO2 could improve the tribological performance of PTFE / PEEK composites,thus the best tribological performance was obtained at 1% TiO2. The wear rate of 1% nano-TiO2/ PTFE /PEEK composites was only 50% of that of PTFE / PEEK composites and 70% of that of micro-TiO2/PTFE / PEEK composites. In addition,in the same testing conditions and filler contents,the nano-TiO2 filled in PTFE / PEEK composites had better tribological performance and lower contact temperature thanthat of micro-TiO2/ PTFE / PEEK composites. Scanning electron microscope（ SEM） images revealed that1% nano-TiO2 could form uniform,and smooth transfer film,and reduce the adhesive wear of PTFE /PEEK composites.

关 键 词：聚四氟乙烯/聚醚醚酮复合材料 TiO2 摩擦学性能 

分 类 号：TH117.1[机械工程—机械设计及理论]