摘要 : It is well known that carbon fiber (CF) reinforced PEEK (polyether-ether-ketone) (defined as "PEEK/CF") composites have excellent properties and have been widely used in diverse fields. Meanwhile, hexagonal boron nitride (h-BN), a... 展开 It is well known that carbon fiber (CF) reinforced PEEK (polyether-ether-ketone) (defined as "PEEK/CF") composites have excellent properties and have been widely used in diverse fields. Meanwhile, hexagonal boron nitride (h-BN), as an excellent nano reinforcing agent, is often incorporated into polymer to improve its mechanical strength and thermal conductivity. Herein, PEEK matrix was regulated by adding high-strength CF as the load-bearing phase and 2D h-BN sheets as the solid lubricant and thermally conductive fillers prepared by melt blending to achieve the multi-scale packing of uniform mixing. The results show that h-BN is well dispersed in PEEK matrix and improves the interfacial bonding between CF and PEEK matrix, exhibiting a good synergistic effect in enhancing tensile properties of composites. PEEK composite with 20 wt% CF and 4 wt% h-BN (referred as P/20C/4B) exhibits the highest tensile strength (176.05 MPa) and thermal conductivity (0.396 W/(m.K)), which are 97.54% and 126.3% over those of pure PEEK (89.12 MPa; 0.175 W/(m.K)), respectively. In addition, PEEK composite with 10 wt% CF and 4 wt% h-BN (referred as P/10C/4B) has excellent tribological properties with a friction coefficient of 0.15, the lowest fiction temperature (30.5 degrees C) and a relative low wear rate of 1.62 x 10(-6) mm(3)/(N.m) among them. The synergitic effects of h-BN and CF on mechanical, tribological properties and thermal conductivity of PEEK composites provides a very broad prospect in their application of low frictional and wear resistant polymeric materials. 收起