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通过KMnO_4、(NH_4)_2HPO_4和浓HNO_3对PAN基碳纤维(T300)进行表面改性,以聚醚醚酮(PEEK)为基体,制备碳纤维(CF)/聚醚醚酮复合材料。利用红外光谱和拉曼光谱对改性后的CF表面结构进行了研究。通过扫描电镜观察了CF和PEEK之间的界面粘结情况,用拉伸实验机对复合材料进行力学测试。结果表明,KMnO_4、(NH_4)_2HPO_4和浓HNO_3处理后CF表面无序度和活性碳原子增多,提高了CF表面活性,其中浓HNO3处理后CF表面含无序度最大,表面活性更强,制备的CF/PEEK复合材料相容性及其力学性能最好。
The PAN-based carbon fibers (T300) were surface modified with KMnO_4, (NH_4) _2HPO_4, and concentrated HNO_3 to prepare carbon fiber (CF) / polyetheretherketone composites using polyetheretherketone (PEEK) as matrix. The surface structure of modified CF was studied by infrared spectroscopy and Raman spectroscopy. The interfacial adhesion between CF and PEEK was observed by scanning electron microscopy. The tensile test machine was used to test the mechanical properties of the composites. The results showed that the surface irregularities of CF and the number of activated carbon increased after KMnO_4, (NH_4) _2HPO_4 and HNO_3 treatment, and the surface activity of CF was enhanced. The surface of CF with HNO3 treatment had the highest degree of disorder and the more surface activity. The CF / PEEK composites have the best compatibility and mechanical properties.