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

AuthorsBizhani, Hasti; Katbab, Ali Asghar; Lopez-Hernandez, Emil; Miranda, Jose Miguel; Verdejo, Raquel
Ethylene–propylene–diene monomer
Multiwall carbon nanotubes
Electromagnetic interference
EMI shielding
Issue Date8-Apr-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationPolymers 12(4): 858 (2020)
AbstractThe 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
Description© 2020 by the authors.
Publisher version (URL)https://doi.org/10.3390/polym12040858
Appears in Collections:(ICTP) Artículos
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