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采用硅烷偶联剂KH-550、高温氧化和超声波+偶联剂复合方法(简称超声复合方法)分别对碳纤维(CF)进行表面处理,制备不同表面处理的CF改性热塑性聚酰亚胺(PI)复合材料,研究表面处理CF对CF/PI复合材料力学和摩擦磨损性能的影响,利用扫描电子显微镜对PI复合材料磨损表面进行观察。结果表明:与纯PI相比,CF的加入提高了PI复合材料的机械性能,经超声复合处理的CF的增强效果较好;磨损表面表明:超声复合处理CF改性PI复合材料磨损表面的犁沟和磨屑较少,且平整。
Carbon fiber (CF) was surface treated with silane coupling agent KH-550, high temperature oxidation and ultrasonic + coupling agent composite method (referred to as ultrasonic composite method) to prepare different surface-treated CF modified thermoplastic polyimide ) Composites. The effects of surface treatment CF on the mechanical properties and friction and wear properties of CF / PI composites were investigated. The wear surface of PI composites was observed by scanning electron microscopy. The results show that the addition of CF improves the mechanical properties of PI composites compared with pure PI, and the enhancement effect of CF by ultrasonic compounding is better. The worn surfaces show that the composite ply Ditch and wear debris less, and smooth.