Microwave Absorption Properties of Carbon Nanotubes-Epoxy Composites in a Frequency Range of 2 - 20 GHz

Zhou Wang, Guang-Lin Zhao

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Department of Physics, Southern University and A & M College, Baton Rouge, Louisiana, USA..

DOI: 10.4236/ojcm.2013.32003                

Abstract

In this work, multi-walled carbon nanotubes (MWCNTs)-epoxy composites with MWCNTs (outer diameter less 8 nm) loadings from 1 to 10 wt% were fabricated. The microstructures, dielectric constant, and microwave absorption properties of the MWCNTs-epoxy composite samples were investigated. The measurement results showed that the microwave absorption ratio of the MWCNTs-epoxy composite strongly depend on the MWCNT loading in the composites. The microwave absorption ratio up to 20%-26% around 18-20 GHz was reached for the samples with 8-10 wt% MWCNT loadings. The high absorption performance is mainly attributed to the microwave absorption of MWCNTs and the dielectric loss of MWCNTs-epoxy composites.

Keywords

Microwave Absorption; Multi-Walled Carbon Nanotubes; Epoxy Composites; Absorption Ratio; Dielectric Loss

Conflicts of Interest

The authors declare no conflicts of interest.

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