石油用石墨烯复合材料的制备与性能研究

Study on Preparation and Properties of Graphene Composite Materials for Petroleum

以聚丙烯腈(PAN)和聚甲基丙烯酸甲酯(PMMA)为前驱体,并加入煤基氧化石墨烯(CGO),采用静电纺丝技术与热处理相结合的方法制备了石油用煤基石墨烯负载多孔炭纳米纤维复合材料(CG/PCNF),对比分析了复合材料的显微形貌和电化学性能。结果表明,CNF试样在制备过程中已经完成了氮吸附且主要为微孔结构,而PCNF试样和CG/PCNF试样分别为微孔和介孔并存结构;CNF、PCNF和CG/PCNF试样的比表面积从低至高的顺序为CNF<PCNF 800<CG/PCNF,平均孔径从低至高顺序为CG/PCNF<PCNF 800<CNF,总孔容和介孔孔容从低至高顺序为CNF<CG/PCNF<PCNF 800;CNF、PCNF800和CG/PCNF试样都具有优良的电容行为,经过5000次循环充放电后,3组试样的比电容值都在92%以上,且CG/PCNF试样具有最大的比电容值,约为95.46%,CG的加入可以有效提升复合材料的循环稳定性。

Porous carbon nanofiber composites(CG/PCNF)loaded with coal-based graphene oxide(CGO)were prepared by electrospinning and heat treatment using polyacrylonitrile(PAN)and polymethyl methacrylate(PMMA)as precursors,the morphology and electrochemical properties of the composites were compared and analyzed.The results show that the nitrogen adsorption of CNF samples has been completed and the main porous structure is microporous,while PCNF samples and CG/PCNF samples have microporous and mesoporous coexistence structures,respectively.The order of specific surface area of CNF,PCNF and CG/PCNF samples from low to high is CNF<PCNF 800<CG/PCNF 800<CNF,and the order of average pore size from low to high is CG/PCNF<PCNF 800<CNF,and the order of total pore volume and mesoporous volume from low to high is CNF<CG/PCNF<PCNF 800;CNF,PCNF800 and CG/PCNF all have excellent capacitive behavior,and a after 5000 cycles of charging and discharging,the specific capacitance values of the three groups of samples are above 92%,and the CG/PCNF samples have the largest specific capacitance value,which is about 95.46%;The addition of CG can effectively improve the cyclic stability of the composites.