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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (14): 1609-1616. 上一篇    下一篇

研究论文

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

罗亮，窦辉*，郝迪，高思旖，张校刚   

  1. (南京航空航天大学材料科学与技术学院 南京 210016)
  • 投稿日期:2010-12-13 修回日期:2011-03-11 发布日期:2011-03-30
  • 通讯作者: 窦辉 E-mail:dh_msc@nuaa.edu.cn
  • 基金资助:

    南京航空航天大学中央高校基本科研业务费专项资金;国家自然科学基金

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

LUO Liang, DOU Hui, HAO Di, GAO Si-Yi, ZHANG Xiao-Gang   

  1. (College of Material Science and Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016)
  • Received:2010-12-13 Revised:2011-03-11 Published:2011-03-30
  • Supported by:

    the Special Fund for Basic Scientific Research of Central Colleges, Nanjing University of Aeronautics and Astronautics

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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 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.

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

Poly(3,4-ethylenedioxythiophene)/multi-walled carbon nanotubes (PEDOT/MWCNTs) nanocomposites 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 tetrachloroferrate ([bmim]FeCl4) to form [bmim]FeCl4/MWCNTs gel. Then the 3,4-ethylenedioxythiophene (EDOT) monomer was added into the gel and in situ polymerized under the oxidation of . The PEDOT/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 transform infrared spectrometry (FT-IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The electrochemical properties of the PEDOT/MWCNTs nanocomposites were investigated 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 PEDOT/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.

Key words: magnetic ionic liquid, multi-walled carbon nanotube, PEDOT/MWCNTs, nanocomposite, ball milling

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