Abstract
The impact of reinforcing multi-walled carbon nanotubes (MWCNT) and uni-directional carbon fibre fabric (UCFF) in the epoxy polymer matrix on the electromagnetic interference shielding efficiency (EMI SE) is studied in the X-band frequency range (8–12 GHz). The increase in the weight percentage (wt%) of pristine MWCNT increases the EMI SE of the nanocomposites. Inclusion of UCFF, as a layer, enhances the EMI SE of the structure to a great extent giving an EMI SE of around 75 dB at 12 GHz for UCFF-sandwiched 5 wt% MWCNT–epoxy composite. The layered structure, epoxy–MWCNT/UCFF/epoxy–MWCNT introduces heterogeneity and this results in a SE much higher than the individual contributions of MWCNT and UCFF. The analysis suggests that the presence of thin layer of UCFF absorbs the radiation apart from inducing multiple scattering enhancing the absorption within the MWCNT–epoxy region.
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Sharma, A., Babu, M.S., Kumar, A.V. et al. Electromagnetic shielding efficiency of carbon fibre fabric-sandwiched epoxy–MWCNT nanocomposites. Bull Mater Sci 45, 44 (2022). https://doi.org/10.1007/s12034-021-02629-6
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DOI: https://doi.org/10.1007/s12034-021-02629-6