As the mass fraction of CF increases, the impact performance of CF-reinforced PTFE decreases, while the tensile strength and hardness are increasing; CF and PTFE can be well compatible under the action of pyrophosphate titanate coupling agent When the mass fraction of CF is 30%, the addition of coupling agent s~DI increases the interface bonding strength between resin and CF, which can increase the tensile strength of the material from 25MPa to more than 50 MPa, and significantly improve the impact performance of the composite material. However, rare earth elements (RE) can improve the affinity between GF and PTFE, effectively improve the interface bonding force between the two, thereby improving the tensile properties of the composite material. The ternary composite materials with the mass fractions of PTFE, graphite and GF of 85%, 10% and 5% respectively have better overall performance. Research by Xue Yujun et al. When the mass fraction of rare earth elements is 0.

And wear resistance. showed that the synergistic effect of graphite and an appropriate amount of hard fillers on the modification of PTFE is ideal, which not only increases the surface hardness of PTFE, but also improves the impact strength of the material. Research by Wang Jiaxu et al. prepared samples of chopped CF and GF reinforced PTFE under different formulations through cold pressing and sintering and solidification processes, and studied their mechanical properties and microstructure. Sun Chunfeng et al. Rigid fillers such as CF, GF, PbS increase the hardness of PTFE and reduce the impact toughness; soft fillers such as graphite and molybdenum disulfide reduce the hardness of PTFE and increase the impact toughness.3%, the material has the best tensile properties, and the tensile strength and elongation at break are increased by 30% and 50%, respectively.

The tensile strength of CF exceeds 3GPa, and the modulus of elasticity is not less than 220GPa. showed that with the addition of GF, the tensile properties of the material decrease. GF has high strength and rigidity and good thermal conductivity, which can improve the mechanical properties of PTFE composite materials; but the affinity between GF and PTFE matrix is poor, and it is difficult for the reinforcing phase to form an effective bond with the matrix material, which leads to the interface The bonding strength is low. The addition of CF can significantly improve the physical properties, mechanical properties and friction resistance of PTFE composites.

Commonly used inorganic fillers for filling PTFE mainly include fibers such as glass fiber (GF), carbon fiber (CF), ceramic particles such as silicon carbide (SiC), silicon dioxide (SiO2), graphite, molybdenum disulfide (MoS2), sulfide Lead (PbS) and barium sulfate (BaSO4), etc. showed that with the increase of CF filling amount, the tensile strength and elongation of composite materials decrease, but the hardness and compressive strength increase, and the friction coefficient decreases slightly; adding PTFE BBQ Mesh Mat CF and filling PTFE composite with graphite The strength and elongation of materials have the same trend. The study by Shi Yanling et al. The use of coupling agent to treat the surface of GF can improve the wettability between GF and the matrix to a certain extent