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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (24): 2923-2928. 上一篇    下一篇

研究论文

聚噻吩/多壁碳纳米管复合材料的导电性能

王红敏, 晋圣松, 唐国强, 韩菲菲, 梁旦, 徐学诚*   

  1. (华东师范大学纳米功能材料与器件研究中心 上海 200062)
  • 投稿日期:2007-05-28 修回日期:2007-07-16 发布日期:2007-12-28
  • 通讯作者: 徐学诚

Conductive Properties of Polythiophene/Multi-walled Carbon Nanotubes Composites

WANG Hong-Min; JIN Sheng-Song; TANG Guo-Qiang; HAN Fei-Fei; LIANG Dan; XU Xue-Cheng*   

  1. (Center of Functional Nanomaterials and Devices, East China Normal University, Shanghai 200062)
  • Received:2007-05-28 Revised:2007-07-16 Published:2007-12-28
  • Contact: XU Xue-Cheng

PDF

1257

被引次数

77

通过共混多壁碳纳米管(MWNTs)和聚噻吩(PTh), 制备了PTh/MWNTs复合材料, 复合材料表现出良好的导电性能(电导率达16.1 S/m). 通过Raman, TG, XPS, UV-Vis等对复合材料进行了分析, 结果表明, MWNTs和 PTh之间存在强的相互作用, MWNTs上的离域电子与噻吩共轭主链上的π电子之间形成π-π共轭, 电子从MWNTs转移到聚噻吩, 增加了噻吩主链的有效共轭长度, 提高了复合材料的导电性能. FESEM分析表明, MWNTs和它周围被掺杂的聚噻吩通过π-π共轭作用结合在一起, 形成相对独立的导电单元, 在复合材料的导电体系中起到主要作用.

关键词: 聚噻吩, 碳纳米管, 掺杂, 复合材料, 电荷转移

Multi-walled carbon nanotubes (MWNTs) were used as filler to prepare polythiophene (PTh)/MWNTs composites, which have a high conducting performance (16.1 S/m). Raman spectra, thermogravimetric (TG), X-ray spectroscopy (XPS) and ultraviolet-visible absorption spectra (UV-Vis) were employed to characterize these composites. The results suggest that an intensive interaction between MWNTs and PTh does exist. A π-π system is formed between delocalized electrons in MWNTs and the π-electrons in the conjugated chain of PTh. The electrons transfer from MWNTs to PTh through this π-π system, which can prolong the effective conjugated chain of PTh and improve the conductibility of the composites. Field emission scanning electron microscopy (FESEM) analysis indicates that MWNTs are combined with the doped PTh to form individual conductive units, which play a role in the conducting system of the composites.

Key words: polythiophene, carbon nanotube, doping, composite, electron transfer