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Research Article Open access CC BY 4.0

High Microwave Absorption of Multi-Walled Carbon Nanotubes (Outer Diameter 10 – 20 nm)-Epoxy Composites in R–Band

John I. Ejembi, Ifeanyi H. Nwigboji, Zhou Wang, Diola Bagayoko, Guang- Lin Zhao

Physical Science International Journal · pp. 1–10 · Published 2 Nov 2015

10.9734/PSIJ/2015/19439

Abstract

We studied the microwave absorption of multi-walled carbon nanotubes (MWCNTs)-epoxy composites over a continuous frequency range in R-band (26.5 – 40 GHz). The outer diameters (OD) of the MWCNTs were in the 10 – 20 nm range. We measured and analyzed the microstructures, dielectric and the microwave absorption properties of the composite samples. High attenuation factor which correlates significant absorption of microwave was observed in the 32 – 40 GHz frequency band. Microwave absorption was due to high dielectric losses, interfacial charge polarization, and the free electron mobility in the composite material. Our results also show the dependence of microwave absorption on the loading fractions of MWCNTs and on the thickness of the absorbing material. Significant microwave absorption capabilities of the composite samples were achieved at 7 to 10 wt.% of MWCNT loadings for frequencies above 32 GHz.

Composites nanotubes dielectric properties conducting polymers microwave absorption

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Cited by 1

Enhanced corrosion protection performance with MWCNT dispersed epoxy coating prepared under supercritical CO2 assistance

Zeba Khanam, Vir Singh, Muhammad Ghulam Haider Zaidi · Polymers for Advanced Technologies · 2018

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