The effect of different layered materials on the tribological properties of PTFE composites  

作　　者：Song LI Chunjian DUAN Xiao LI Mingchao SHAO Chunhui QU Di ZHANG Qihua WANG Tingmei WANG Xinrui ZHANG 

机构地区：[1]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]University of Chinese Academy ofSciences,Beijing 100049,China

出　　处：《Friction》2020年第3期542-552,共11页摩擦（英文版）

基　　金：The authors would like to thank the financial support from National Basic Research Program of China(973 Program,Grant No.2015CB057502);the Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant No.2018457);National Key Research and Development Plan(Grant No.2016YFF0101000);This research was also partially supported by the Key Research Program of Frontier Science,Chinese Academy of Sciences(Grant No.QYZDJ-SSW-SLH056);National Natural Science Foundation of China(Grant No.51673205).

摘　　要：Two-dimensional(2D)lamellar materials have unique molecular structures and mechanical properties,among which molybdenum disulfide(MoS2)and graphitic carbon nitride(g-C3N4)with different interaction forces served as reinforcing phase for polytetrafluoroethylene(PTFE)composites in the present study.Thermal stability,tribological and thermomechanical properties of composites were comprehensively investigated.It was demonstrated that g-C3N4 improved elastic deformation resistance and thermal degradation characteristics.The addition of g-C3N4 significantly enhanced anti-wear performance under different loads and speeds.The results indicated that PTFE composites reinforced by g-C3N4 were provided with better properties because the bonding strength of g-C3N4 derived from hydrogen bonds(H-bonds)was stronger than that of MoS2 with van der Waals force.Consequently,g-C3N4 exhibited better thermomechanical and tribological properties.The result of this work is expected to provide a new kind of functional filler for enhancing the tribological properties of polymer composites.

关 键 词：graphitic carbon nitride lamellar materials hydrogen bonds wear resistance 

分 类 号：TB332[一般工业技术—材料科学与工程]