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Synthesis of carbon nanotube/polyaniline composite nanotube and its microwave permittivity

Zhao Dong-Lin Zeng Xian-Wei Shen Zeng-Min

Synthesis of carbon nanotube/polyaniline composite nanotube and its microwave permittivity

Zhao Dong-Lin, Zeng Xian-Wei, Shen Zeng-Min
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  • Abstract views:  3016
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  • Received Date:  10 December 2004
  • Accepted Date:  01 February 2005
  • Published Online:  20 August 2005

Synthesis of carbon nanotube/polyaniline composite nanotube and its microwave permittivity

  • 1. 北京化工大学可控化学反应科学与技术基础教育部重点实验室,碳纤维及复合材料研究所 ,北京 100029

Abstract: A carbon nanotube/polyaniline composite nanotube with a diameter of 50—80 nm has been prepared. The carbon nanotubes encapsulated by polyaniline (PANI) with a thickness of 20—30 nm have been synthesized by in-situ emulsion polymerization. The microwave permittivity of the carbon nanotube/polyaniline composite nanotubes has been investigated in the frequency range of 2—18 GHz. The real part (ε′) and imaginary part (ε″) of the complex permittivity of carbon nanotube/polyaniline composite nanotube change little, as compared with those of carbon nanotubes at frequencies 2—18 GHz. The ε′ and ε″ of the carbon nanotube/polyaniline composite nanotube are small at low frequencies, which make it easy to match the impedance of free-space in the design of microwave absorbing materials. The dissipation factor tanδ(ε″/ε′) of carbon nanotube/polyaniline composite nanotube is high. So the carbon nanotube/polyaniline composite nanotube is a good microwave absorbent.

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