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Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene-Propylene-Diene Monomer/Multiwall Carbon Nanotube Nanocomposites

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Bizhani, Hasti and Katbab, Ali Asghar and López Hernández, Emil and Miranda Pantoja, José Miguel and Verdejo, Raquel (2020) Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene-Propylene-Diene Monomer/Multiwall Carbon Nanotube Nanocomposites. Polymers, 12 (4). ISSN 2073-4360

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Official URL: https://doi.org/10.3390/polym12040858


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Abstract

The need for electromagnetic interference (EMI) shields has risen over the years as the result of our digitally and highly connected lifestyle. This work reports on the development of one such shield based on vulcanized rubber foams. Nanocomposites of ethylene-propylene-diene monomer (EPDM) rubber and multiwall carbon nanotubes (MWCNTs) were prepared via hot compression molding using a chemical blowing agent as foaming agent. MWCNTs accelerated the cure and led to high shear-thinning behavior, indicative of the formation of a 3D interconnected physical network. Foamed nanocomposites exhibited lower electrical percolation threshold than their solid counterparts. Above percolation, foamed nanocomposites displayed EMI absorption values of 28-45 dB in the frequency range of the X-band. The total EMI shielding efficiency of the foams was insignificantly affected by repeated bending with high recovery behavior. Our results highlight the potential of cross-linked EPDM/MWCNT foams as a lightweight EM wave absorber with high flexibility and deformability.


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© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This research was funded by MICIU, grant number MAT2016-81138-R.

Uncontrolled Keywords:Emi shielding properties; Electrical-properties; Composite foams; Conductivity; Performance; Behavior; Network; Rubber
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
ID Code:60967
Deposited On:29 Jun 2020 08:43
Last Modified:29 Jun 2020 09:14

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