Effect of grafted polytetrafluoroethylene nanoparticles on the mechanical and tribological performances of phenol resin

► The addition of nano polytetrafluoroethylene particles (nano-PTFE) undergone grafting acrylic acid irradiation increased the mechanical properties of PF nanocomposites. ► The tribological properties of PF nanocomposites were increased by the incorporation of modified nano-PTFE. ► Proper amount of grafted nano-PTFE can be well separated in PF matrix.