磁性离子液体中聚乙撑二氧噻吩/多壁碳纳米管纳米复合材料的球磨法制备及表征  

Preparation and Characterization of Poly(3,4-ethylenedioxythiophene)/Multi-walled Carbon Nanotubes Nanocomposite via Ball Milling in Magnetic Ionic Liquid

作　　者：罗亮[1] 窦辉[1] 郝迪[1] 高思旖[1] 张校刚[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《化学学报》2011年第14期1609-1616,共8页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20873064);南京航空航天大学中央高校基本科研业务费专项资金(No.NS2010154)资助项目

摘　　要：以磁性离子液体1-丁基-3-甲基咪唑四氯化铁盐([bmim]FeCl4)为介质,将多壁碳纳米管(MWCNTs)机械球磨分散在其中形成[bmim]FeCl4/MWCNTs凝胶后,加入乙撑二氧噻吩(EDOT)单体,利用阴离子FeCl-4的氧化性进行原位聚合,球磨法制备了均匀包覆不同含量MWCNTs的聚乙撑二氧噻吩/多壁碳纳米管(PEDOT/MWCNTs)纳米复合材料.并以傅里叶红外光谱(FT-IR)、扫描电镜(SEM)和透射电镜(TEM)对PEDOT/MWCNTs的结构与形貌进行了表征;在0.5 mol/L硫酸溶液中,用循环伏安测试(CV)研究了PEDOT/MWCNTs的电化学行为;采用四探针仪测定了PEDOT/MWCNTs的电导率;热重分析(TGA)研究了PEDOT/MWCNTs的热稳定性.结果表明,PEDOT纳米颗粒均匀包覆于MWCNTs表面,形成了核壳结构;PEDOT与MWCNTs之间的共轭作用随着MWCNTs含量的增加而增强.MWCNTs的质量分数为30%的PEDOT/MWCNTs的电导率出现峰值,达到7.46 S/cm,且电化学活性最好.MWCNTs的质量分数为10%时,PEDOT/MWCNTs的热稳定性相对于PEDOT显著提高.Poly（3,4-ethylenedioxythiophene）/multi-walled carbon nanotubes（PEDOT/MWCNTs） nano-composites by using the magnetic ionic liquid as the medium and oxidant was prepared.Firstly,the MWCNTs was mechanically dispersed into the magnetic ionic liquid 1-butyl-3-methylimidazolium tetra-chloroferrate（FeCl4） to form FeCl4/MWCNTs gel.Then the 3,4-ethylenedioxythiophene（EDOT） monomer was added into the gel and in situ polymerized under the oxidation of.The PE-DOT/MWCNTs nanocomposites with different content of MWCNTs were synthesized via ball milling.The structure and morphology of the PEDOT/MWCNTs nanocomposites were characterized by Fourier trans-form infrared spectrometry（FT-IR）,scanning electron microscopy（SEM）,and transmission electron mi-croscopy（TEM）.The electrochemical properties of the PEDOT/MWCNTs nanocomposites were investi-gated by cyclic voltammetry in 0.5 mol/L H2SO4.The conductivity of the composites was measured by four-point probe measurement.The thermal stability was analysed by thermogravimetric analysis（TGA）.The results indicated that the PEDOT uniformly coated on the surface of MWCNTs and form the PE-DOT/MWCNTs nanocomposites with core-shell structure.The conjugated interaction between PEDOT and MWCNTs was enhanced with the increase of the MWCNTs content in the PEDOT/MWCNTs.When 30% MWCNTs was added,the conductivity of the PEDOT/MWCNTs nanocomposite could be up to 7.46 S/cm and had the good electrochemical activity.When 10% MWCNTs was added,the thermal stability of the PEDOT/MWCNTs nanocomposite was obviously improved compared with that of PEDOT.

关 键 词：磁性离子液体 多壁碳纳米管 PEDOT/MWCNTs 纳米复合材料 球磨 

分 类 号：TB383.1[一般工业技术—材料科学与工程]