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Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications
Dimension reduction, cost efficiency, and environmental sustainability are important factors in absorbent designs. Geopolymers represent an eco-friendly and cost-efficient solution for such applications, and the objective of this study is to develop new geopolymer-based composites with tailored diel...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7570878/ https://www.ncbi.nlm.nih.gov/pubmed/32937984 http://dx.doi.org/10.3390/molecules25184218 |
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author | Vlasceanu, Ioana Nicoleta Gharzouni, Ameni Tantot, Olivier Martinod, Edson Rossignol, Sylvie |
author_facet | Vlasceanu, Ioana Nicoleta Gharzouni, Ameni Tantot, Olivier Martinod, Edson Rossignol, Sylvie |
author_sort | Vlasceanu, Ioana Nicoleta |
collection | PubMed |
description | Dimension reduction, cost efficiency, and environmental sustainability are important factors in absorbent designs. Geopolymers represent an eco-friendly and cost-efficient solution for such applications, and the objective of this study is to develop new geopolymer-based composites with tailored dielectric properties. To develop such composites, different formulations based on three types of carbon and various surfactants are tested. The nonionic surfactant is preferred over the anionic surfactant. Dielectric investigations between 2 and 3.3 GHz are performed. The results reveal that the carbon content and its type (origin) have significant effects on the dielectric characteristics and less on the magnetic characteristics. Indeed, an increase in permittivity from 2 to 24 and an increase from 0.09 to 0.6 for loss tangent are shown with changes in the carbon content and type. A permittivity (ε) of 2.27 and loss (tan δ) of 0.19 are obtained for a pore size of 1.6 mm, for the carbon type with the lowest purity, and with a nonionic surfactant. Finally, it is shown that the addition of magnetite has little impact on the overall magnetic properties of the geopolymer. |
format | Online Article Text |
id | pubmed-7570878 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-75708782020-10-28 Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications Vlasceanu, Ioana Nicoleta Gharzouni, Ameni Tantot, Olivier Martinod, Edson Rossignol, Sylvie Molecules Article Dimension reduction, cost efficiency, and environmental sustainability are important factors in absorbent designs. Geopolymers represent an eco-friendly and cost-efficient solution for such applications, and the objective of this study is to develop new geopolymer-based composites with tailored dielectric properties. To develop such composites, different formulations based on three types of carbon and various surfactants are tested. The nonionic surfactant is preferred over the anionic surfactant. Dielectric investigations between 2 and 3.3 GHz are performed. The results reveal that the carbon content and its type (origin) have significant effects on the dielectric characteristics and less on the magnetic characteristics. Indeed, an increase in permittivity from 2 to 24 and an increase from 0.09 to 0.6 for loss tangent are shown with changes in the carbon content and type. A permittivity (ε) of 2.27 and loss (tan δ) of 0.19 are obtained for a pore size of 1.6 mm, for the carbon type with the lowest purity, and with a nonionic surfactant. Finally, it is shown that the addition of magnetite has little impact on the overall magnetic properties of the geopolymer. MDPI 2020-09-14 /pmc/articles/PMC7570878/ /pubmed/32937984 http://dx.doi.org/10.3390/molecules25184218 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Vlasceanu, Ioana Nicoleta Gharzouni, Ameni Tantot, Olivier Martinod, Edson Rossignol, Sylvie Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications |
title | Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications |
title_full | Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications |
title_fullStr | Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications |
title_full_unstemmed | Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications |
title_short | Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications |
title_sort | geopolymer carbon-based for ultra-wideband absorbent applications |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7570878/ https://www.ncbi.nlm.nih.gov/pubmed/32937984 http://dx.doi.org/10.3390/molecules25184218 |
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