Due to low activity and poor wettability, the fiber-matrix interface is weak area, which seriously affects the mechanical properties of fiber reinforced polymer (FRP) composites. This paper focuses on the improvement of the interfacial adhesion of carbon fiber fabric reinforced polyphenylene sulfide (CF/PPS) composites. A two-step combination strategy, including liquid-phase oxidation and grafting of silane coupling agents (SCAs), is developed to modify CF surfaces. The tensile strength, flexural strength and interlaminar shear strength (ILSS) of CF/PPS composites with modified CFs increased by 5.96%, 36.18% and 21.73%, respectively. And the enhancement mechanism of the modification method established is revealed. Scanning electron microscope (SEM) morphologies on fractured surfaces showed that predominant failure mechanisms changed from interface debonding to deformation and break of matrix. This indicates that this modification method is effective for promoting the interface bonding and enhancing the mechanical performances of CF/PPS composites, showing potential for industrialization.

由于活性低和润湿性差，纤维-基质界面较弱，严重影响了纤维增强聚合物（FRP）复合材料的机械性能。本文着重于改善碳纤维织物增强的聚苯硫醚（CF / PPS）复合材料的界面粘合性。开发了两步组合策略，包括液相氧化和硅烷偶联剂（SCAs）接枝，以改性CF表面。改性CFs的CF / PPS复合材料的拉伸强度，弯曲强度和层间剪切强度（ILSS）分别增加了5.96％，36.18％和21.73％。并且揭示了所建立的修改方法的增强机制。断裂表面的扫描电子显微镜（SEM）形态表明，主要的破坏机理从界面剥离变为基体变形和断裂。这表明该改性方法对于促进界面粘合和增强CF / PPS复合材料的机械性能是有效的，显示出工业化的潜力。