Journal of Aeronautical Materials (Aug 2020)

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

  • ZHU Qiaosi,
  • LI Jiongli,
  • GUO Jianqiang,
  • LI Xuerui,
  • LIANG Jiafeng,
  • LI Yue,
  • WANG Xudong

DOI
https://doi.org/10.11868/j.issn.1005-5053.2020.000098
Journal volume & issue
Vol. 40, no. 4
pp. 9 – 18

Abstract

Read online

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 3D 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%.

Keywords