石墨/环氧树脂复合材料的理化及摩擦学性能  

Physicochemical and Tribological Properties of Graphite/Epoxy Resin Composites

作　　者：吴祥顺 尹维 董璐 胡志红 王宇 WU Xiangshun;YIN Wei;DONG Lu;HU Zhihong;WANG Yu(College of Mechanical Engineering,Tianjin University of Technology and Education,Tianjin 300300,China;Lubrication and Friction Testing Center,Tsinghua University Tianjin High end Equipment Research Institute,Tianjin 300300,China)

机构地区：[1]天津职业技术师范大学机械工程学院,天津300300 [2]清华大学天津高端装备研究院润滑与摩擦检测中心,天津300300

出　　处：《塑料工业》2024年第12期53-59,67,共8页China Plastics Industry

基　　金：国家自然科学基金(51505248);天津职业技术师范大学科研启动项目(KYQD202313)。

摘　　要：固体自润滑材料具有低摩擦、高耐磨性、免维护、环保等特点,越来越受到市场的欢迎。本文选用环氧树脂作为基体材料,高纯鳞片石墨作为润滑剂,制备了石墨/环氧树脂自润滑复合材料。通过使用安东帕流变仪、差示扫描量热仪研究石墨/环氧树脂混合物的黏度、固化温度、玻璃化转变等理化性能,使用全自动邵氏硬度计、摩擦磨损试验机、白光干涉三维表面轮廓仪研究了石墨/环氧树脂复合材料的邵氏A硬度、摩擦学性能,探讨了复合材料中石墨质量分数与复合材料理化性能和摩擦学性能的关系。结果表明,5%石墨/环氧树脂复合材料的邵氏A硬度最大;随着石墨质量分数的增加,材料的黏度变大,玻璃化转变温度先降低而后小幅升高;石墨质量分数的变化不影响材料的固化温度;石墨质量分数的增加总体上会降低材料的摩擦系数;磨痕深度随石墨质量分数的增加而变浅,随载荷的增加而变深。研究结果为自润滑石墨/环氧树脂复合材料的应用提供了技术支撑。Solid self-lubricating materials have the characteristics of low friction,high wear resistance,maintenance-free and environmental protection,and become more and more popular in the market.In this paper,to prepare graphite/epoxy resin self-lubricating composites,epoxy resin was selected as the matrix material and high-purity flake graphite was used as the lubricant.The physicochemical properties of graphite/epoxy resin mixtures such as viscosity,curing temperature and glass transition were studied by using Anton Paar rheometer and differential scanning calorimeter.The Shore A hardness and tribological properties of graphite/epoxy resin composites were studied by using automatic Shore hardness tester,friction and wear testing machine and white light interferometry three-dimensional surface profiler.The relationships among the graphite mass fraction,physicochemical properties,and tribological properties of composites were discussed.The results show that the Shore A hardness of 5%graphite/epoxy resin composite is the highest.With the increase of graphite mass fraction,the material viscosity increases,and the glass transition temperature decreases first and then increases slightly.The change of graphite mass fraction does not affect the material curing temperature.The increase of graphite mass fraction generally reduces the frictional coefficient of the material.The depth of wear track becomes shallower with the increase of graphite mass fraction and deepens with the increase of load.The research results provide technical supports for the applications of self-lubricating graphite/epoxy resin composites.

关 键 词：固体润滑 石墨 环氧树脂 玻璃化转变温度 摩擦系数 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]