阳极氧化通电电流对碳纤维层剪强度及界面亲和性的影响

Study on the effects of anodic oxidation electrial current on ILSS and interface compability of carbon fiber

利用阳极氧化表面处理装置,碳酸氢铵作为电解质,以恒定的处理时间,对直流电源的电流进行调节,研究电流对直径5μm的6KPAN基碳纤维层间剪切强度和拉伸强度的影响,并通过SEM对拉伸试样的断面进行观察和对比,研究电流对界面亲和性的影响。结果表明,通电电流增大,层间剪切强度增大;合理调节通电电流,有效提高环氧树脂和碳纤维粘结强度,纤维与树脂的界面结合紧密,使纤维复材的整体承载能力增强,复丝强度较好。根据研究,直径5μm的6KPAN基碳纤维通常最佳电流强度应控制在20~25mA/K。

This paper used the anodic oxidation surface treatment equipment,with ammonium bicar bonate as electrolyte,with constant processing time,adjusted electrial current of DC power supply to study the influence of the current strength to ILSS and tensile strength of carbon fiber, whose diameter is 5μm. Through the SEM observed the break section＇s interface of the samples to contrast and anlys is. The results showed that stronger current strength and ILSS will increase. Suitalbe adjusting the current strengh will enhance the fiber composite material＇s carrying capacity,make its strength effectively play. With the study, for 6K carbon fiber, whose diameter is 5μm, the best current strength should be controlled at 20 mA to 25 mA per K.