【摘要】 借助XPS、力学分析、SEM扫描电镜、傅立叶红外光谱 ,较系统地考察了碳纤维表面组成与结构的变化及阳极氧化表面处理对碳纤维复合材料层间剪切强度的作用与影响。结果表明 :采用碳酸氢铵为电解质对碳纤维进行阳极电解氧化表面处理后 ,其复合材料的层间剪切断裂转变为以张力断裂形式为主 ;通过适当地增加碳纤维表面的羟基含量 ,提高活性碳原子数与非活性碳原子数比 ,可有效地改善碳纤维复合材料的使用性能 ,使碳纤维层间剪切强度提高 49% ,层间剪切强度达 85 .5MPa。更多还原

【Abstract】 The variation of surface composition and structure of PAN-based carbon fiber was systematically characterized by XPS, SEM, IR and mechanical testing, as was the correlation between anodic surface treatment and interlaminar shear strength. The results showed that the mechanism of shear fracture changed into tension fracture by using ammonium bicarbonate as electrolyte. The performance of PAN-based carbon fiber could be effectively improved by properly increasing the amount of hydroxy group on the surface and the ratio of active and inactive carbon atoms. As a result, the interlaminar shear strength was 85.5 MPa with an increase of 49%.更多还原