中文摘要：

为了研究工艺温度对复合材料界面的调控作用,设计采用三阶段固化工艺（即扩散、固化和后固化）,考察了不同温度制度下3种碳纤维/双马树脂（BMI）复合材料界面粘结性能的变化规律。采用原子力显微镜（AFM）和傅里叶变换红外光谱（FTIR）深入分析了上浆剂对纤维表面粗糙度和化学特性的影响,研究了上浆剂的反应活性及其与双马树脂的反应性,采用微珠脱粘方法测试了碳纤维/树脂的界面剪切强度（IFSSs）。结果表明,200℃处理2h后3种碳纤维上浆剂均发生部分反应,并且170℃,2h后上浆剂均与双马树脂发生化学反应。对比不同温度条件可以发现后固化阶段对碳纤维/双马体系的界面剪切强度影响显著,未经后固化的复合材料界面性能最低;110℃和140℃恒温扩散阶段对碳纤维/双马体系的界面剪切强度的影响不明显。同种温度条件下,CF1和CF3上浆剂与双马树脂的反应程度高于CF2,相应的CF1和CF3与双马树脂的界面剪切强度较高,表明上浆剂与双马树脂间的化学反应程度是影响其界面粘结性能的主要因素。该研究结果对我国碳纤维上浆剂的研制具有参考价值。

英文摘要：

In order to study the effect of processing temperature on the regulating function of composite interface,three-stage curing processes of diffusion,cure and post cure are designed,and the interfacial adhesion variation is investigated of three carbon fibers/bismaleimide（BMI）composites under different processing temperatures.In-depth analysis of sizing agent on fiber surface roughness and chemical properties is carried out by AFM and FTIR,the chemical reactivity of sizing agent and the chemical reactions between sizing agent and BMI are studied,and the interfacial shear strengths（IFSSs）of carbon fiber/BMI are measured by micro-droplet.The results show that all the sizings partially react at 200℃,and chemical reactions take place between the sizing agent and BMI after 2htreatment at 170℃.Comparing different temperature processes,the post-cure stage is found to have greater effect on the IFSSs of carbon fiber/BMI,and the temperature scheme without the post-cure stage shows the lowest values of IFSS.The diffusion stage of 110℃and 140℃has little effect on IFSSs.Under the same temperature,the reaction degree between CF1 and CF3sizing agent with BMI is higher than that of CF2,and the corresponding IFSSs of CF1 and CF3with BMI are higher than that of CF2,indicating that the chemical reaction degree between sizing agent and BMI is a main factor in controlling the interfacial adhesion.These research results may provide reference for the development of carbon fiber sizing.