湿法纺丝工艺制备聚丙烯腈/氧化石墨烯复合纤维及性能研究

Research on the Preparation of Polyacrylonitrile/Graphene Oxide Composite Fiber and Its Properties Based on Wet-spinning Process

选取聚丙烯腈(PAN)和氧化石墨烯(GO)共混复合,通过湿法纺丝工艺技术,制备不同氧化石墨烯固含量的聚丙烯腈/氧化石墨烯复合纤维。基于非溶剂致相分离理论,以二甲基甲酰胺(DMF)/水混合体系作为凝固浴,非溶剂扩散到聚丙烯腈纤维中使得聚丙烯腈快速凝固。本文通过SEM、FTIR对复合纤维形态和结构进行了表征。DMA测试结果表明,GO固含量为1wt.%的复合纤维拥有最好的热机械性能,储能模量达到5.5GPa,损耗因子tanδ为0.139。

By adopting polyacrylonitrile(PAN） and graphene oxide(GO）,polyacrylonitrile/graphene oxide composite fibers with different contents of solid grapheme oxide were prepared by wet-spinning process. Based on nonsolvent induced phase separation theory,N-dimethyl formamide(DMF）/water mixture system was employed as coagulation bath,non-solvent(water） was diffused into PAN fibers and led to a quick PAN solidification. The morphology and structure of composite fibers were characterized via SEM and FTIR. The results of dynamic thermomechanical analysis(DMA） indicated that when the solid content of GO reached 1 wt. %,the composite fiber showed the best thermal mechanical property with storage modulus 5. 5 GPa and loss tangent 0. 139.