石墨烯理化参数对低含量石墨烯填充聚四氟乙烯摩擦磨损的影响  

Effect of physical and chemical parameters of graphene on friction and wear properties of PTFE filled with low content graphene

作　　者：朱巧思 李炯利 郭建强 李学瑞 梁佳丰 李岳 王旭东 ZHU Qiaosi;LI Jiongli;GUO Jianqiang;LI Xuerui;LIANG Jiafeng;LI Yue;WANG Xudong(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Beijing Institute of Graphene Technology,Beijing 100094,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]北京石墨烯技术研究院有限公司,北京100094

出　　处：《航空材料学报》2020年第4期9-18,共10页Journal of Aeronautical Materials

基　　金：国家自然科学基金项目(51802296);北京市科技计划资助项目(Z171100002017016)。

摘　　要：研究石墨烯平均片径、片层厚度、比表面积、碳氧比等理化参数对其填充改性聚四氟乙烯复合材料摩擦磨损性能的影响。通过扫描电子显微镜(SEM)、原子力显微镜(AFM)、物理吸附仪、X射线光电子能谱仪(XPS)分别表征4种石墨烯的表面形貌及平均片径、片层厚度、比表面积、碳氧比,采用可控环境摩擦磨损仪测试复合材料的摩擦因数,采用三维白光干涉形貌仪测试复合材料的体积磨损率。结果表明:填充量相同时,石墨烯的碳氧比是影响复合材料摩擦因数的主要因素,石墨烯的比表面积是影响复合材料体积磨损率的主要因素;当石墨烯填充量为1%(质量分数,下同)时,碳氧比为45.64、碳含量为97.66%的石墨烯可以使聚四氟乙烯复合材料摩擦因数降低27.97%;比表面积为466.78 m2/g的石墨烯可以使聚四氟乙烯复合材料体积磨损率降低76.46%。4 types of graphene were used to fabricate graphene/polytetrafluoroethylene(PTFE) composites with loadings of 0.5%and 1% respectively. The average size, thickness, specific surface area and carbon/oxygen ratio(C/O ratio) of these graphene were characterized by SEM, AFM, BET and XPS. The friction coefficient was performed on the Controllable Environment Friction and Wear Instrument. The volume wear rate was carried out with the 3 D White Light Interferometer. The results show that at the same load, the C/O ratio of graphene is the main factor affecting the friction coefficient of the composites, while the specific surface area of graphene is the main factor affecting the volume wear rate of the composites. With the addition of 1%(mass fraction,the same below) graphene in PTFE, the friction coefficient is reduced by 27.97% when the C/O ratio reaches 45.64 and the carbon content reaches 97.66%. With a specific surface area reaches 466.78 m2/g, graphene can reduce the volume wear rate of the PTFE composite by 76.46%.

关 键 词：石墨烯 聚四氟乙烯 碳氧比 比表面积 摩擦磨损 

分 类 号：TB34[一般工业技术—材料科学与工程]