采用改进的Hummers法制备氧化石墨烯,并还原制得还原氧化石墨烯(rGO),将聚乙烯吡咯烷酮(PVP)与所制rGO共混作为纺丝溶液,采用静电纺丝法制备了石墨烯/PVP复合纤维。通过扫描电子显微镜(SEM)、红外光谱仪(FT-IR)、X射线衍射仪(XRD)和四探针测试仪等手段对石墨烯及电纺复合纤维进行表征与导电性能研究。结果表明:随着还原时间的增加,石墨烯电导率逐渐增大,当还原8h时,电导率最大为321.2S/cm;PVP含量10%,rGO含量1.5%,无水乙醇作为溶剂,静电纺丝制备的复合纤维直径分布均匀,表面光滑,电导率达到最大值3.012S/cm。

Graphene oxide was prepared by modified hummers method,and graphene was obtained by reduction.With polyvinylpyrrolidone (PVP)/graphene blend as the spinning solution,graphene/PVP composite fiber was prepared by electrospinning.The characterization and electrical conductivity of the fibers were studied by scanning electron microscopy (SEM),infrared spectroscopy (FT-IR),X-ray diffractometry (XRD) and four-probe tester.The results shown that the conductivity of graphene increased with the increase of reduction time.When the reduction was 8h,the conductivity was up to 321.2S/cm.The PVP content of 10%,the graphene content of 1.5%,anhydrous ethanol was used as solvent,the fiber prepared by spinning had a uniform diameter distribution,a smooth surface,and a conductivity of 3.012S/cm.