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High Frequency Electromagnetic Shielding by Biochar-Based Composites

Daniele TorselloIstituto Nazionale di Fisica Nucleare, Sez. Torino, Via P. Giuria 1, 10125 Turin, ItalyMattia BartoliCenter for Sustainable Future Technologies—CSFT@POLITO, Via Livorno 60, 10144 Torino, ItalyMauro GiorcelliConsorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via G. Giusti 9, 50121 Florence, ItalyMassimo RoverePolitecnico di Torino, Department of Applied Science and Technology, C.so Duca degli Abruzzi 24, 10129 Turin, ItalyRossella ArrigoPolitecnico di Torino, Department of Applied Science and Technology, Viale Teresa Michel 5, 15121 Alessandria, ItalyGiulio MalucelliConsorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via G. Giusti 9, 50121 Florence, ItalyAlberto TagliaferroFaculty of Science, Ontario Tech University, 2000 Simcoe Street North, Oshawa, ON L1G 0C5, CanadaG. GhigoIstituto Nazionale di Fisica Nucleare, Sez. Torino, Via P. Giuria 1, 10125 Turin, Italy

2021en

ABI

Annotatsiya

We report on the microwave shielding efficiency of non-structural composites, where inclusions of biochar-a cost effective and eco-friendly material-are dispersed in matrices of interest for building construction. We directly measured the complex permittivity of raw materials and composites, in the frequency range 100 MHz-8 GHz. A proper permittivity mixing formula allows obtaining other combinations, to enlarge the case studies. From complex permittivity, finally, we calculated the shielding efficiency, showing that tailoring the content of biochar allows obtaining a desired value of electromagnetic shielding, potentially useful for different applications. This approach represents a quick preliminary evaluation tool to design composites with desired shielding properties starting from physical parameters.

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DOI: 10.3390/nano11092383

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