PTFE微粉改性聚醚醚酮摩擦磨损性能及应用研究  

Friction and Wear Properties and Application of PEEK Modified by PTFE Micropowder

作　　者：王文东[1,2] 袁周钢 WANG Wengdong;YUAN Zhougang(Shanghai Research Institute of Materials,Shanghai 200437,China;Shanghai Research Key Laboratory for Engineering Materials Evaluation,Shanghai 200437,China)

机构地区：[1]上海材料研究所,上海200437 [2]上海市工程材料应用评价重点实验室,上海200437

出　　处：《有机氟工业》2021年第2期32-36,64,共6页Organo-Fluorine Industry

摘　　要：采用常温机械共混、高温模压的方法,制备了不同质量分数聚四氟乙烯(PTFE)微粉和碳纤维改性的聚醚醚酮(PEEK)复合材料,对其压缩强度、摩擦磨损性能进行了研究,并分析了其磨损后的表面形貌。结果表明:随着PTFE微粉质量分数的增加,PEEK复合材料的压缩强度呈下降趋势,当PTFE微粉质量分数为40%时,其压缩强度下降至60 MPa。随着聚碳纤维质量分数的增加,PEEK复合材料的压缩强度呈上升趋势。随着PTFE微粉和碳纤维质量分数的增加,PEEK复合材料的干摩擦因数和磨痕宽度逐渐下降,当PTFE微粉质量分数为40%时,PEEK复合材料干摩擦因数下降至0.21,其干摩擦磨痕宽度略有上升。随着碳纤维质量分数的增加,PEEK复合材料在油润滑条件下摩擦因数和磨痕宽度较低并略有下降。PEEK复合材料在干摩擦条件下的磨损机制以磨粒磨损为主,伴有疲劳磨损;在油润滑时,摩擦面可形成稳定连续的润滑膜而保持光滑。PEEK复合材料具有较高的压缩强度,摩擦磨损性能良好,可以制作各种滑动轴承、密封圈等特种机械零部件。Polyetheretherketone(PEEK)composites reinforced by polytetrafluoroethylene(PTFE)micro-powder and carbon fiber were prepared by mechanical mixing and hot compressing molding,their compressive strength,friction and wear properties and wear morphology were studied.The results show that,increasing the proportions of PTFE micro-powder,the compressive strength decreased.When the mass fraction of PTFE micro-powder was 40%,the compressive strength decreased to 60 MPa.Increasing the proportions of carbon fiber,the compressive strength showed an increasing trend.Increasing the proportions of PTFE micro-powder and carbon fiber,dry friction coefficient and wear scar width of the composites decreased.Under oil lubrication,friction coefficient and wear scar width of the composites were small.Under dry friction,the wear mechanism of composites was abrasive wear,accompanied by fatigue wear.Under oil lubrication,the uniform and continuous lubricating film can be formed on the tribosurface,the tribosurface was smooth.

关 键 词：聚醚醚酮 聚四氟乙烯微粉 摩擦因数 磨痕宽度 润滑膜 

分 类 号：TQ317[化学工程—高聚物工业] TB332[一般工业技术—材料科学与工程]