聚合物改性石墨烯薄膜的制备与导电性能  

Preparation and Conductivity of Polymer Decorated Graphene Film

作　　者：刘红宇[1] 彭淑鸽[1] 潘炳力[1] 牛青山[1] 

机构地区：[1]河南科技大学化工与制药学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2016年第5期91-95,9,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(21101058);河南科技大学博士科研基金项目(13480051)

摘　　要：以Hummers法制备氧化石墨,超声剥离得到氧化石墨烯(graphene oxide,GO)。在25℃和90℃两种温度下,以聚乙烯亚胺(polyethyleneimine,PEI)为GO的还原剂和修饰剂,制备了PEI改性石墨烯分散液。光电子能谱和红外光谱揭示了温度对PEI还原GO反应的影响。研究结果表明:25℃时,PEI具有部分还原GO的能力,得到PEI修饰的氧化石墨烯(PEI-GO);90℃时,接枝的PEI逐渐从GO片层上解离,并将GO还原为表面修饰的石墨烯(PEI-RGO)。将石墨烯分散液抽滤组装为PEI-RGO薄膜,发现其电导率为117 S·m^(-1),有望用于石墨烯导电材料。Graphite oxide was prepared by Hummers method,followed by the sonication treatment to produce graphene oxide( GO). Polyethyleneimine( PEI) was used as reducing agent and modifier to prepare PEI modified graphene aqueous solutions at 25 ℃ and 90 ℃,respectively. By means of X-ray photoelectron spectroscopy and Fourier transform infrared spectrometer,the influence of reaction temperature on the GO reduction reaction of PEI was analyzed. The results show that PEI can partially reduce GO at 25 ℃ to get PEIGO. However,the grafted PEI chains are dissociated from GO sheets and GO is reduced to RGO,forming surfaced modified PEI-RGO at 90 ℃. The prepared graphene suspension is assembled into PEI-RGO thin film by filtration method. The conductivity of PEI-RGO film is as high as 117 S · m^(-1),which has potential in graphene conductive materials.

关 键 词：导电 石墨烯薄膜 聚乙烯亚胺 

分 类 号：O611.4[理学—无机化学]