碳纤维织物增强聚苯硫醚(CFF/PPS)复合材料是重要的热塑性航空复合材料,其难点为提高碳纤维(CF)与基体的浸润性及界面强度.探讨了CF表面修饰对CFF/PPS界面结合强度的影响,对比了热处理去浆及三种表面修饰剂对碳纤维单丝及CFF/PPS复合材料的改性效果.采用X射线光电子能谱分析(XPS)、扫描电子显微镜(SEM)、单丝强度测试、复合材料静力学测试和动态力学分析等手段对CF表面修饰效果进行评价,建立了基于CF表面修饰制备高性能CFF/PPS热塑性航空复合材料的方法.制备的复合材料层间剪切强度达91.4MPa,弯曲强度953.7MPa,拉伸强度797.4MPa,模量68.4GPa,冲击强度58.3kJ/m2,用SEM观察到CF表面包覆大量PPS树脂.
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