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- 2018
国产聚丙烯腈基高强高模碳纤维电化学氧化表面处理工艺
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Abstract:
以国产聚丙烯腈（PAN）基M55J级碳纤维（CF）为研究对象，首先在不同电解液体系中进行循环伏安多重扫描，比较其氧化能力的差异，进行电解液的筛选。然后用最佳电解液对CF进行恒流连续氧化处理，通过Raman光谱、XPS和SEM的表征，研究了电化学氧化对高强高模CF表面结构及化学组成的影响，并通过测试CF束丝拉伸性能及其与树脂结合后的层间剪切强度对CF的力学性能进行了表征。研究结果表明，NH4HSO4电解质溶液对CF进行表面处理时，其刻蚀能力最强，可以有效改善其表面活性，增大其表面粗糙度和含氧官能团数量。采用0.6 mol/L的NH4HSO4电解液体系，在1 mAcm-2电流密度下对CF进行阳极氧化，CF与树脂间的层间剪切强度比未处理提高了164%，同时CF的拉伸强度略有提高，模量无明显变化。 Domestic polyacrylonitrile (PAN)-based M55J grade carbon fiber (CF) was electrochemically oxidized by cyclic voltammetry multi-scans in different electrolyte systems. The screening of the electrolyte was carried out by comparing the difference in oxidation capacity, and then CF was treated with the method of continuous constant-current anodic oxidation. The effects of electrochemical oxidation on the surface structure and chemical components of high strength and high modulus CF were studied by Raman spectroscopy, XPS and SEM. And the mechanical properties of CF were characterized by the tensile properties of the test beam and the interlaminar shear strength after bonding with the resin. The results show that NH4HSO4 electrolyte solution on the surface treatment of CF, can get the strongest etching ability, can effectively improve the surface activity of CF, increase the surface roughness and oxygen content of the number of functional groups. The CF is anodized at a current density of 1 mAcm-2 using a 0.6 mol/L NH4HSO4 electrolyte system. The interlaminar shear strength between the CF and the resin is 164% higher than that of the untreated, while the tensile strength of CF is slightly improved and the modulus is not changed obviously. 国家863计划（2015AA03A202）
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