不同填料氟橡胶复合材料高温性能研究  

Study on High Temperature Properties of Fluorine Rubber Composites with Different Fillers

作　　者：亓明 贾现召[1] 石建永 许泽华 张嘉琦 QI Ming;JIA Xianzhao;SHI Jianyong;XU Zehua;ZHANG Jiaqi(College of Mechanical and Electrical Engineering,Henan University of Science and Technology,Luoyang Henan 471000,China;Key Laboratory of Key Functional Parts of Machine of Anyang Institute of Technology,Anyang Henan 455000,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471000 [2]安阳工学院机床关键功能部件重点实验室,河南安阳455000

出　　处：《润滑与密封》2021年第2期106-113,共8页Lubrication Engineering

摘　　要：为提高氟橡胶(FKM)高温性能,在FKM中分别加入相同质量分数的聚四氟乙烯(PTFE)、气相二氧化硅(SiO2)、纳米氧化锌(Nano-ZnO),采用机械共混法制备3种FKM复合材料;研究常温和160℃高温下3种填料对FKM复合材料力学性能的影响,结合三维形貌和扫描电镜微观形貌,分析FKM复合材料的摩擦磨损机制。结果表明:PTFE填料降低了FKM材料的力学性能,但可提高其高温摩擦性能;Nano-ZnO填料可提高FKM材料常温力学性能,但对高温力学及摩擦性能没有明显改善;Silica填料可显著改善FKM材料常温与高温条件下的抗磨减摩、抗拉伸撕裂等特性;160℃试验条件下,Silica填料可使FKM材料的拉伸强度提高31%,撕裂强度提高142%,摩擦因数降低52%,磨损量减少36.4%;在FKM中添加Silica可提高基体强度,高温摩擦时形成熔融层,使复合材料具有优异的耐磨性能。In order to improve the high temperature mechanics and friction performance of fluorine rubber(FKM),three kinds of FKM composites were prepared by mechanical blending and by adding the same mass fraction of polytetrafluoroethylene(PTFE),gas phase silica and nano ZnO.The effects of three fillers on the mechanical properties of FKM composites at normal temperature and 160℃high temperature were studied,the friction and wear mechanism of FKM composites was analyzed by combining three-dimensional morphology and scanning electron microscopy.The results show that PTFE fillers can improve the high temperature friction properties of FKM materials,but decrease the mechanical properties.Nano ZnO fillers can improve the mechanical properties of FKM materials at room temperature,but can not significantly improve the high temperature mechanical and friction properties.Silica fillers can significantly improve the properties of FKM,such as anti-wear,friction reduction and anti-tearing,etc.Under the test condition of 160℃,silica fillers can increase the tensile strength of FKM materials by 31%and the tear strength by 142%,and reduce the friction coefficient by 52%and wear volume by 36.4%.The matrix strength can be improved by adding silicon into FKM,and a molten layer can be formed during high temperature friction,which makes the composites have excellent wear resistance.

关 键 词：氟橡胶 聚四氟乙烯 气相二氧化硅 纳米氧化锌 高温性能 

分 类 号：TB332[一般工业技术—材料科学与工程]