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以氧化石墨烯为添加物,采用静电纺丝的方法制备不同质量分数的聚丙烯腈/氧化石墨烯(PAN/GO)复合纳米纤维。使用扫描电镜(SEM)、透射电镜(TEM)对复合纳米纤维的微观结构进行观察;采用差示扫描量热仪(DSC)和热重分析仪(TGA)研究复合纳米纤维的热学性能随着氧化石墨烯添加量增加的变化;采用微机控制电子万能试验机对复合纳米纤维的力学性能进行研究。结果表明,加入氧化石墨烯后,纺制的PAN/GO纳米复合纤维会变细,但随着GO添加量的增多出现珠节现象,降低了纤维的粗细均匀度,同时加入GO后对PAN的氧化具有一定的抑制作用,而且GO的加入也使PAN的力学性能增加,当加入量为0.1%时断裂强力增加了一倍,但添加量为1%时,断裂强力又会降低,综合实验结果显示当加入氧化石墨烯的质量分数为0.1%时最适宜。
Using graphene oxide as an additive, polyacrylonitrile / graphene oxide (PAN / GO) composite nanofibers with different mass fractions were prepared by electrospinning. The microstructure of the composite nanofibers was observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The thermal properties of the composite nanofibers were characterized by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) Graphene added amount of change; using computer controlled electronic universal testing machine to study the mechanical properties of composite nanofibers. The results showed that the PAN / GO nanofibers could be thinned with the addition of graphene oxide, but with the addition of GO, the appearance of beads appeared and the uniformity of fiber thickness was decreased. At the same time, Oxidation has a certain degree of inhibition, and the addition of GO also increases the mechanical properties of PAN. When the addition amount is 0.1%, the breaking strength is doubled. However, the breaking strength decreases with the addition of 1% It is most suitable when the mass fraction of graphene oxide added is 0.1%.