Abstract: Carbon fibers (CFs) were surface oxidized and aminated，respectively. The influence on the element contents and functional groups of the fiber surface was investigated with X-ray photoelectron spectroscopy (XPS). The oxygen content increased significantly and the (O+N)/C ratio was comparably higher after oxidation treatment. The oxygen content decreased while the nitrogen content increased as formation of amino groups after amination treatment. The soakage of water and epoxy resin to CF surface was characterized by the contact angle which was measured through the insert method and liquid droplet method，respectively. As a result，the contact angle of CFs with respect to epoxy resin was found to be remarkably decreased. The contact angle of the aminated CFs with respect to epoxy resin was lower than that of the oxidized ones，which proved surface amino group increment to be a stimulative factor on the soakage of epoxy resin to CFs.

摘要： 分别用氧化方法和氨化方法对碳纤维进行表面处理，采用XPS研究不同处理方法对碳纤维表面元素组成以及官能团的影响。结果表明经过氧化处理后，碳纤维表面的氧含量明显增加，表面有较高的m(O+N)/m(C)比；氨化处理后，碳纤维表面的氮元素明显增加，氧含量减少，并且增加的氮元素主要以氨基的形式存在。采用接触角测试中的插入法和液滴法分别研究碳纤维处理后在水和环氧树脂中的接触角变化。结果表明，经过氧化和氨化方法处理后碳纤维与环氧树脂的接触角降低。氧化与氨化相比，氨化处理后碳纤维与环氧树脂之间有较低的接触角，表明在碳纤维表面增加氨基官能团能显著改善碳纤维和环氧树脂之间的浸润性能。