以NH4HCO3为电解质对PAN基炭纤维进行了连续表面处理,并利用X射线光电子能谱(XPS)、X射线衍射(XRD)、拉曼光谱、扫描电子显微镜(SEM)和自动电位滴定等方法,系统研究了电化学氧化反应后炭纤维表面石墨微晶尺寸的变化规律,推导出微晶宽度(La)、微晶厚度(Lc)与电流密度(J)之间存在线性关系式;同时,经电化学氧化处理后,炭纤维表面含氧官能团的摩尔分数增加8.54%,表面吸附水的摩尔分数增加5.34%,使其表面由憎液性变为亲液性,这有利于提高炭纤维增强树脂基复合材料(CFRP)的层间剪切强度(ILSS).
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