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根据碳纤维表面的特点及其复合材料中树脂基体进行电子束固化的机理 ,对碳纤维表面进行预氧化以提高碳纤维表面含氧官能团的含量 ,利用偶联剂的化学架桥作用对电子束固化复合材料界面进行了增效研究 .采用X射线光电子能谱 (XPS)对处理后碳纤维表面化学成分进行了分析 ,并采用层间剪切强度对电子束固化复合材料界面粘合性能进行了评价 .结果表明 ,碳纤维表面的含氮官能团使电子束固化复合材料中碳纤维与环氧树脂基体之间的粘合强度减弱 ,偶联剂与预氧化碳纤维表面进行了强相互作用 ,使电子束固化复合材料层间剪切强度得到提高
According to the characteristics of the carbon fiber surface and the mechanism of the electron beam curing of the resin matrix in the composite material, the surface of the carbon fiber is pre-oxidized to improve the content of the oxygen-containing functional groups on the surface of the carbon fiber, and the chemical bridging effect of the coupling agent is used for electron beam curing composite material Interface was studied.X-ray photoelectron spectroscopy (XPS) was used to analyze the surface chemical composition of the treated carbon fiber and interfacial shear strength was used to evaluate the interfacial adhesion of the electron beam-cured composites.The results show that , The nitrogen-containing functional groups on the carbon fiber surface weaken the bonding strength between the carbon fibers in the electron beam-curable composite material and the epoxy resin matrix, and the coupling agent strongly interacts with the surface of the pre-oxidized carbon fiber so that the electron beam- Shear strength is improved