为了研究两种不同上浆剂和湿热环境对国产300级碳纤维/环氧树脂体系微观界面性能的影响，采用单丝断裂法，测试分析了去浆前后碳纤维单丝复合体系在自然干态、湿热处理3d及湿热处理6d的状态下微观界面剪切应力的变化。结合对扫描电镜（ SEM）、原子力显微镜（ AFM）及X射线光电子能谱（ XPS）等测试结果的分析，研究了碳纤维上浆剂对微观界面性能及其界面耐湿热性能的影响。结果表明：去浆前后A300碳纤维表面均有明显沟槽；上浆剂1并未使A300碳纤维表面粗糙度有明显变化，但上浆剂2使A300碳纤维表面粗糙度减小，而两种上浆剂均使A300碳纤维表面含氧极性官能团含量减少。两种上浆剂对制备的复合材料界面性能和耐湿热性能都有较大的提高，其中上浆剂1在自然干态下对界面性能的提高更明显。
To investigate the influence of sizing agens and hygrothermal environments on micro-interface property of domestic 300 carbon fibers ( A300-1、A300-2 )/epoxy resin, a series of experiments were conducted. Interface property of sizing and desized carbon fiber systems under dry and hygrothermal environments was investigated by single fiber fragmentation test ( SFFT ) . And the surface property of carbon fibers was analyzed by scanning electron microscope ( SEM ) , atomic force microscope ( AFM ) and X-ray photoelectron spectroscopy (XPS). The results show that the grooves uniformly dispersed on the surface of both sizing and desized carbon fibers. Compared with desized carbon fibers, the surface roughness of A300-1 carbon fibers was almost unchanged, but it reduced with sizing agent 2. Both of the sizing agents reduced the oxygen functional groups of the carbon fiber surface. The micro-interface property of sizing carbon fibers/epoxy resin was proved better than desized carbon fiber systems under dry and hygrothermal environments.
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