采用聚多巴胺（PDA）对碳纤维进行表面改性制备聚苯醚（PPO）复合材料，以改性碳纤维为填料，探究不同填料比例对复合材料力学及摩擦性能的影响。结果表明：加入PDA改性碳纤维，PPO复合材料的力学性能和耐磨性能得到改善。改性碳纤维添加量为4%时，PPO复合材料的拉伸强度较纯PPO材料的增加了20%，断裂伸长率维持在123%，冲击强度为14.5 kJ/m²，层间剪切强度为32 MPa。随着改性碳纤维添加量的增加，复合材料的摩擦系数呈现先上升后下降的趋势，且在改性碳纤维添加量为4%时达到最高。

Polyphenylene oxide (PPO) composites were prepared by surface modification of carbon fibers with polydopamine(PDA). The modified carbon fibers were used as fillers to investigate the effects of different filler ratios on the mechanical and friction properties of the composites. The results show that the mechanical properties and wear resistance of PPO composites are improved by adding PDA modified carbon fiber. When the amount of modified carbon fiber added is 4%, the tensile strength of PPO composite increases by 20% compared to pure PPO material, and the elongation at break is maintained at 123%, the impact strength is 14.5 kJ/m²， and the interlayer shear strength is 32 MPa. As the amount of modified carbon fiber added increases, the friction coefficient of the composites shows a trend of first increasing and then decreasing, and reaches its highest point when the amount of modified carbon fiber added is 4%.