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Epoxy Coatings Containing Modified Graphene for Electromagnetic Shielding

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Faculty of Chemical Engineering and Biotechnologies, University Politehnica Bucharest, Gh. Polizu Street, 011061 Bucharest, Romania
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S.C. Protect Chemical S.R.L., 6 Cercetătorilor Street, 042024 Bucharest, Romania
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Advanced Polymer Materials Group, University Politehnica of Bucharest, Gh. Polizu Street, 011061 Bucharest, Romania
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National Institute for Research and Development in Microtechnologies (IMT-Bucharest), 126A Erou Iancu Nicolae Street, 023573 Bucharest, Romania
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Military Technical Academy “Ferdinand I”, 39-49 George Coșbuc Boulevard, 050141 Bucharest, Romania
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Research and Innovation Center for CBRN Defense and Ecology, 225 Soseaua Oltenitei, 041327 Bucharest, Romania
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Faculty of Electronics, Telecommunications and Information Technology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
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The Special Telecommunications Service, 323A Splaiul Independenţei, 060044 Bucharest, Romania
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Faculty of Electrical Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
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National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest, Romania
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S.C. Stimpex S.A., 46-48 Nicolae Teclu Street, 032368 Bucharest, Romania
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Marcelo Antunes
Polymers 2022, 14(12), 2508; https://doi.org/10.3390/polym14122508
Received: 17 May 2022 / Revised: 16 June 2022 / Accepted: 17 June 2022 / Published: 20 June 2022
This study presents the functionalization and characterization of graphene and electromagnetic interference (EMI) attenuation capacity in epoxy-nanocomposites. The modification of graphene involved both small molecules and polymers for compatibilization with epoxy resin components to provide EMI shielding. The TGA and RAMAN analyses confirmed the synthesis of graphene with a different layer thickness of the graphene sheets. Graphene samples with different layer thicknesses (monolayer, few layers, and multilayer) were selected and further employed for epoxy coating formulation. The obtained nanocomposites were characterized in terms of EMI shielding effectiveness, SEM, micro-CT, magnetic properties, and stress-strain resistance. The EMI shielding effectiveness results indicated that the unmodified graphene and hexamethylene diamine (HMDA) modified graphene displayed the best EMI shielding properties at 11 GHz. However, the epoxy nanocomposites based on HMDA modified graphene displayed better flexibility with an identical EMI shielding effectiveness compared to the unmodified graphene despite the formation of aggregates. The improved flexibility of the epoxy nanocomposites and EMI shielding characteristics of HMDA functionalized graphene offers a practical solution for textile coatings with microwave absorbing (MA) capacity. View Full-Text
Keywords: radar absorbing materials; flexible epoxy textile coating; graphene functionalization radar absorbing materials; flexible epoxy textile coating; graphene functionalization
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MDPI and ACS Style

Bontaș, M.G.; Diacon, A.; Călinescu, I.; Necolau, M.I.; Dinescu, A.; Toader, G.; Ginghină, R.; Vizitiu, A.-M.; Velicu, V.; Palade, P.; Istrate, M.; Rusen, E. Epoxy Coatings Containing Modified Graphene for Electromagnetic Shielding. Polymers 2022, 14, 2508. https://doi.org/10.3390/polym14122508

AMA Style

Bontaș MG, Diacon A, Călinescu I, Necolau MI, Dinescu A, Toader G, Ginghină R, Vizitiu A-M, Velicu V, Palade P, Istrate M, Rusen E. Epoxy Coatings Containing Modified Graphene for Electromagnetic Shielding. Polymers. 2022; 14(12):2508. https://doi.org/10.3390/polym14122508

Chicago/Turabian Style

Bontaș, Marius Gabriel, Aurel Diacon, Ioan Călinescu, Mădălina Ioana Necolau, Adrian Dinescu, Gabriela Toader, Raluca Ginghină, Alexandru-Mădălin Vizitiu, Valentin Velicu, Petru Palade, Marcel Istrate, and Edina Rusen. 2022. "Epoxy Coatings Containing Modified Graphene for Electromagnetic Shielding" Polymers 14, no. 12: 2508. https://doi.org/10.3390/polym14122508

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