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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (7): 611-617. 上一篇    下一篇

研究论文

聚3-辛基噻吩/MWNTs复合材料的导电性能研究

韩菲菲 梁 旦 王红敏 徐学诚*

  

  1. (华东师范大学物理系 纳米功能材料与器件研究中心 上海 200062)

  • 投稿日期:2008-09-18 修回日期:2008-11-03 发布日期:2009-04-14
  • 通讯作者: 徐学诚

Conductive Properties of Poly(3-octylthiophene)/Multi-walled Carbon Nanotubes Composites

Han, Feifei Liang, Dan Wang, Hongmin Xu, Xuecheng*   

  1. (Center of Functional Nanomaterials and Devices, Department of Physics, East China Normal University, Shanghai 200062)
  • Received:2008-09-18 Revised:2008-11-03 Published:2009-04-14
  • Contact: Xu, Xuecheng

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被引次数

10 | 6

采用在氯仿溶液中超声共混, 制备聚3-辛基噻吩(P3OT)和多壁碳纳米管(MWNTs)复合材料. 当MWNTs掺杂量为3%时复合材料的电导率为1.43 S•m－1, 达到纯MWNTs的电导率水平. 用FTIR光谱, TG, UV-Vis光谱, XPS和FESEM进行研究分析, 认为MWNTs的离域电子与P3OT主链上的π电子之间形成π-π共轭, 增加了P3OT主链的有效共轭度, 被掺杂的P3OT具有很高的电导率, 提高了复合材料的导电性能. MWNTs与被掺杂的P3OT组成相对独立的导体单元, 对复合材料的导电网络形成起着主要作用.

关键词: 聚3-辛基噻吩, 碳纳米管, 独立导电单元, 复合材料

Multi-walled carbon nanotubes (MWNT) were used as filler to prepare poly(3-octylthiophene) (P3OT)/MWNT composites in chloroform, which were ultrasound blended. When the content of MWNTs was 3%, the conductivity of composite almost attained that of pure MWNT (1.43 S•m－1). Fourier transform infrared spectroscopy (FTIR), thermo-gravimetry (TG), X-ray spectroscopy (XPS), ultraviolet-visible absorption spectra (UV-Vis) and field emission scanning electron microscopy (FESEM) were employed to characterize these composites. The results suggest that π-π system is formed between the delocalized electrons in MWNT and the π-electrons in the conjugated main chain of P3OT. The effectively conjugated chain of P3OT is prolonged by MWNTs. The doped P3OT has a high conductivity and can improve the conductivity of composites. MWNT was combined with the doped P3OT to form individual conductive units, which play a key role in forming the conducting net of composites.

Key words: poly(3-octylthiophene), carbon nanotube, individual conductive unit, composite