阳极氧化表面处理对碳纤维性能的影响

通过对国产PAN基碳纤维和沥青基碳纤维阳极氧化处理,得到了两种纤维的性能(σ_f,Cox/Cgr,表面形态)随阳极氧化处理条件变化的关系.实验结果表明,阳极氧化能较大地增加碳纤维表面的化学活性和物理活性.碳纤维经阳极氧化后,表面形成①—C—OH,②—C—OH=O,—O—C—O—,③—C=O,④R—CO₃—四种类型的含氧官能团,随阳极电位的升高,表面含氧官能团含量增加.阳极处理后的碳纤维,在其表面形成了微细缺陷,缺陷的形状因纤维的种类不同而不同.阳极电位是影响碳纤维性能最关键的电极参数.

THE EFFECT OF ANOD SURFACE TREATMENT ON PROPERTIES OF CARBON FIBERS

It is obtanred that the properties (σf,Cox/Cgr,surface defect) of two kinds of fiber, PAN-based and pitch-based carbon fiber, change with the variation of anod surface conditions in this work.The chemical activity and physical activity of carbon fiber surface can be greatly increased by anod surface treatment.The experiment results show that four kiads of carbon-oxide a.nd the tiny surface defect can be formed on the surface of carbon fibers by and surface treatment.The ratio Cox/Cgr,the relative total content of carbon-oxide,and the size and amount of tiny surface defect increased with the increase of anodic potential.The shape of surface defect of PAN-based carbon fiber is different from that of pitchbased carbon fiber.It is observed that the anodic potential is the most important parameter for anod surface treatment of carbon fibers.