在对长碳纤维 /环氧复合材料 (Cl/Ep)研究的基础上 ,重点研究了纤维空气氧化和次氯酸钠氧化对三维编织碳纤维 /环氧复合材料 (C3D/Ep)力学性能的影响。结果表明 ,纤维表面处理可显著增强纤维 /基体的界面结合强度 ,使其力学性能大幅度提高。其中 ,空气氧化效果最为明显 Based on the investigation of long carbon fiber / epoxy composites (Cl / Ep), the effects of air oxidation and sodium hypochlorite oxidation on the mechanical properties of 3D braided carbon fiber / epoxy composites (C3D / Ep) were mainly studied. The results show that the fiber surface treatment can significantly enhance the fiber / matrix interface bonding strength, its mechanical properties greatly improved. Among them, the air oxidation is most obvious