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物理学报. 2005, 54(8): 3878-3883.
doi: 10.7498/aps.54.3878.
碳纳米管/聚苯胺纳米复合管的制备及其微波介电特性研究
- 收稿日期: 2004-12-10
- 修回日期: 2005-02-01
- 刊出日期: 2005-08-20
English Abstract
Synthesis of carbon nanotube/polyaniline composite nanotube and its microwave permittivity
- Received Date:
10 December 2004
- Accepted Date:
01 February 2005
- Published Online:
20 August 2005
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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