中文摘要：

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／G0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。

英文摘要：

Graphene oxide was obtained to prepare polyacrylonitrile/graphene oxide （PAN/GO） composite nanofibers by electrospinning method. A series of PAN/GO composite nanofibers was prepared with different mass fraction of graphene oxide. The scanning electron ffaicroscope （SEM） and the transmission electron microscopy （TEM） were used to observe the microstructure of the composite nanofibers. And then study the thermal performance of the composite nanofibers via the differential scanning calorimeter （DSC） and the thermal gravimetric analysis （DTA）. Finally computer-controlled electronic universal testing machine was used to study the mechanical properties of the composite nanofibers. The results show that when the graphene oxide was added, the PAN/GO composite nanofibers become thin and the thickness uniformity of the nanofibers was affected. The oxidation of PAN was suppressed because of graphene oxide. The mechanical property of PAN was increased with graphene oxide added. The breaking strength of PAN was doubled when the mass fraction of oxide graphene was 0.1%, but the breaking strength was reduced when that was 1 %. According to the experimental results the mass fraction of oxide graphene at 0.1 % was better.