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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (19): 2245-2252. 上一篇    下一篇

研究论文

多壁碳纳米管/溴/聚苯乙炔三元复合材料导电性能的研究

梁旦   韩菲菲   叶葏   吴玲娟   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:2008-12-01 修回日期:2009-04-27 发布日期:2009-05-19
  • 通讯作者: 徐学诚 E-mail:xcxu@phy.ecnu.edu.cn
  • 基金资助:

    上海市纳米科技专项基金（0252nm011）资助项目

Electrical Conductivity of the Three-component Blends of MWNT/Bromine/Polyphenylacetylene

Liang, Dan        Han, Feifei          Ye, Jing         Wu, Lingjuan     Xu, Xuecheng   

  1. (Center of Functional Nanomaterials and Devices, Department of Physics, East China Normal University, Shanghai 200062)
  • Received:2008-12-01 Revised:2009-04-27 Published:2009-05-19

PDF

1399

被引次数

5

通过机械共混和溶液共混制备了多壁碳纳米管(MWNTs)/溴/聚苯乙炔(PPA)三元复合材料, 复合材料表现出良好的导电性能, 电导率为10 S/m, 达到掺溴MWNTs的导电水平. 通过固体紫外光谱、XPS和SEM分析了复合材料中MWNTs、溴与PPA三者之间的相互作用, 研究了独立导电单元的形成, 以及导电单元对电导率提高所起的作用. 结果表明, 当MWNTs含量较低时, MWNTs和PPA之间的溴转移导致复合材料电导率降低; MWNTs含量较高时, 独立导电单元的数目增多, 复合材料的电导率随之大幅提高.

关键词: 铌原子簇, 多壁碳纳米管, 溴, 聚苯乙炔, 溴转移, 导电单元

The three-component blends composed of multiwall nanotubes (MWNT), bromine and polyphenylacetylene (PPA) were prepared by using two different procedures, e.g., mixing mechanically bromine absorbed MWNT with PPA and blending MWNT with PPA in organic solvents followed by absorbing bromine. The blends showed electrical conductivity of about 10 S/m, approaching to that of bromine doped MWNT. By using UV-Vis spectra, X-ray spectroscopy (XPS), and scanning electron microscope (SEM), the interaction among MWNT, bromine and PPA was investigated, and the influence of individual conductive units on the conductivity of the blends was also studied. The results indicated that the lower content of MWNT in the blends resulted in the transfer of bromine from PPA to MWNT, further bringing about the decrease of the conductivity, whereas higher content of MWNT could greatly enhance the conductivity.

Key words: MWNTs, bromine, polyphenylacetylene, the transfer of bromine, conductive unit