使用浓硫酸和浓硝酸的混合溶液将多壁碳纳米管(MWNTs)进行功能化处理后与PAN进行共混,采用湿法成型技术制备出了PAN／MWNT复合纤维。采用TEM、FTIR、SEM及DMA对酸化后NWNTs和PAN／NWNT复合纤维的结构进行了分析。结果表明:酸化后碳管表面产生羧基和羟基等官能团等基团,可以增加NWNTs与基体之间的相互作用;NWNTs在PAN基体种分散均匀,添加纳米碳管后PAN纤维的储存模量、玻璃化转变温度及强度提高。 Multi-walled carbon nanotubes (MWNTs) were functionalized with a mixed solution of concentrated sulfuric acid and concentrated nitric acid to blend with PAN. PAN / MWNT composite fibers were prepared by wet-forming technique. The structure of NWNTs and PAN / NWNT composite fibers were analyzed by TEM, FTIR, SEM and DMA. The results showed that the functional groups such as carboxyl group and hydroxyl group generated on the surface of carbon nanotubes after acidification could increase the interaction between NWNTs and the matrix. After the NWNTs were uniformly dispersed in PAN matrix, the storage modulus of PAN fibers after adding carbon nanotubes, Change the temperature and intensity.