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采用电化学聚合法,分别以衣康酸、衣康酸/对氨基苯甲酸、邻苯二甲酸/双酚A为聚合单体,在碳纤维表面接枝聚合一层均匀聚合物。利用X光电子能谱仪(XPS)、扫描电子显微镜(SEM)、热重分析仪(TGA)、电子万能试验机,研究了经电化学聚合处理后的碳纤维的表面化学组成、表面形貌、复合材料断面形貌、浸润性及复合材料层间剪切强度(ILSS)的变化。研究结果表明,经电聚合处理后的碳纤维表面接枝上一层带有反应性官能团的聚合物,提高了碳纤维表面活性,与环氧树脂的浸润性提高,复合材料断面纤维拔出明显减少,ILSS明显提高,其中经衣康酸/对氨基苯甲酸处理后的碳纤维的ILSS提高了94%。
Electrochemical polymerization was used to graft a homogeneous polymer on the surface of carbon fiber with itaconic acid, itaconic acid / p-aminobenzoic acid and phthalic acid / bisphenol A as monomers. The surface chemical composition, surface morphology, composite of carbon fiber treated by electrochemical polymerization were studied by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermal gravimetric analyzer (TGA) and electronic universal testing machine Cross section morphology, wettability and interlaminar shear strength (ILSS) of the composites were investigated. The results show that the grafted carbon fiber surface with electropolymerization has a layer of polymer with reactive functional groups, which improves the surface activity of carbon fiber, increases the wettability with epoxy resin, significantly reduces the fiber pull-out of the cross-section of the composite material, ILSS increased significantly, which increased the ILSS of itaconic / p-aminobenzoic acid-treated carbon fibers by 94%.