采用多聚磷酸(PPA)/P2O5弱酸体系,通过傅克反应(Friedel - Crafts reaction)对多壁碳纳米管(MWCNTs)进行功能化改性,加入己内酰胺后采用原位聚合法制备功能化碳纳米管(F- MWCNTs)/尼龙6(PA6)复合材料,并熔融纺丝制备复合纤维.通过TEM、TG、DSC、SEM及力学性能测试对复合纤维进行表征.结果表明:在MWCNTs表面成功地接枝了氨基,F- MWCNTs均匀地分散在PA6基体中,没有发生团聚现象,并且与基体具有很好的界面作用；F MWCNTs的加入,对复合纤维的熔融温度和结晶度影响不大,结晶温度有所提高,并明显提高了复合纤维的热稳定性；随着F MWCNTs的加入,复合纤维的拉伸断裂强度和杨氏模量增加,当F-MWCNTs质量分数为0.5％时,拉伸断裂强度和杨氏模量达到最大,比纯PA6纤维分别提高了45％和208％.
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