利用拉曼光谱(Raman),红外光谱(IR)和扫描电镜(SEM)对经过KClO3/H2SO4液相改性处理的碳纤维(CF)表面结构进行了研究,并初步讨论了微观结构对碳纤维单丝力学性能的影响.结果表明:纤维表面的沟槽随改性处理时间增加逐渐加深；表面处理的刻蚀作用会使晶粒边界活性增大,石墨微晶变小；改性处理能够增加CF表面活性官能团(羧酸(-C=O)和酚羟基(-OH)),降低碳纤维表面惰性；表面处理后纤维的力学性能均有所下降,液相氧化处理60min和120min后,拉伸强度分别降低约15％和50％.
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