碳纤维表面处理及其对碳纤维/聚芳基乙炔复合材料力学性能的影响

Surfacial Modification for Carbon Fiber and Its Effect on the Mechanical Property of CF/PAA

聚芳基乙炔(PAA)是一种新型的热防护材料,但PAA为非极性树脂,作为基体材料使用时存在着化学结构惰性,不易润湿增强体———碳纤维(CF)的缺点。为此,本工作对CF采用表面氧化处理后接枝丙烯酸的改性方案,研究与非极性基体相匹配的界面特性。结果表明,阳极氧化处理增加了纤维表面的极性官能团,提高了与丙烯酸的接枝反应能力,从而在碳纤维表面引入了与PAA相似的双键结构,有利于改善CF/PAA复合材料的界面结合,使碳纤维 /PAA复合材料的力学性能大幅度提高。

Polyarylacetylene (PAA) is a new kind of thermal protection material, however there are some disadvantages due to its nonpolar characteristics when it is used as the matrix resin, such as inertia structure make it hard to impregnate carbon fiber. So the grafting method after anodic oxidation was used to treat carbon fiber so as to investigate the suitable interface for the non-polar matrix. Results show that the polar functional groups on the surface of carbon fiber increase after anodic oxidation treating so as to enhance the reaction of carbon fiber with the acrylic acid and import double-bond which is similar to the structure of PAA. The double-bond imported on the surface of CF will be benefit to improve the interface adhesion of CF/PAA composites and increase the mechanical properties of CF/PAA composites.