Epoxy Coatings Containing Modified Graphene for Electromagnetic Shielding
Marius Gabriel Bontaș,
Aurel Diacon,
Ioan Călinescu,
Mădălina Ioana Necolau,
Adrian Dinescu,
Gabriela Toader,
Raluca Ginghină,
Alexandru-Mădălin Vizitiu,
Valentin Velicu,
Petru Palade,
Marcel Istrate,
Edina Rusen
Affiliations
Marius Gabriel Bontaș
Faculty of Chemical Engineering and Biotechnologies, University Politehnica Bucharest, Gh. Polizu Street, 011061 Bucharest, Romania
Aurel Diacon
Faculty of Chemical Engineering and Biotechnologies, University Politehnica Bucharest, Gh. Polizu Street, 011061 Bucharest, Romania
Ioan Călinescu
Faculty of Chemical Engineering and Biotechnologies, University Politehnica Bucharest, Gh. Polizu Street, 011061 Bucharest, Romania
Mădălina Ioana Necolau
Faculty of Chemical Engineering and Biotechnologies, University Politehnica Bucharest, Gh. Polizu Street, 011061 Bucharest, Romania
Adrian Dinescu
National Institute for Research and Development in Microtechnologies (IMT-Bucharest), 126A Erou Iancu Nicolae Street, 023573 Bucharest, Romania
Gabriela Toader
Military Technical Academy “Ferdinand I”, 39-49 George Coșbuc Boulevard, 050141 Bucharest, Romania
Raluca Ginghină
Research and Innovation Center for CBRN Defense and Ecology, 225 Soseaua Oltenitei, 041327 Bucharest, Romania
Alexandru-Mădălin Vizitiu
Faculty of Electronics, Telecommunications and Information Technology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
Valentin Velicu
The Special Telecommunications Service, 323A Splaiul Independenţei, 060044 Bucharest, Romania
Petru Palade
National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest, Romania
Marcel Istrate
S.C. Stimpex S.A., 46-48 Nicolae Teclu Street, 032368 Bucharest, Romania
Edina Rusen
Faculty of Chemical Engineering and Biotechnologies, University Politehnica Bucharest, Gh. Polizu Street, 011061 Bucharest, Romania
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.