通过溶液聚合得到胺化碳纳米管(Amid-CNT)/聚丙烯腈(PAN)复合溶液,采用湿法纺丝技术制备了Amid-CNT/PAN复合纤维.利用红外光谱、拉曼光谱、差示扫描量热仪、热失重仪和扫描电镜等方法分析Amid-CNT对PAN纤维结构的影响.结果表明:Amid-CNT与PAN大分子之间有很强的化学作用力;Amid-CNT在复合纤维中具有很高程度的取向,使PAN纤维中氰基的取向从1.61提高到了2.30;复合纤维在空气中的起始放热温度相对PAN纤维从212.30℃提前到206.01℃,反应放热量从3054 J/g降低到2346 J/g;复合纤维比PAN纤维的起始失重温度提前了3.7℃,在700℃时的剩余质量提高了13.5%;复合纤维的断面比PAN纤维具有更多的絮状结构.
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