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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/25/18/4218 |
| _version_ | 1797553741278216192 |
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| author | Ioana Nicoleta Vlasceanu Ameni Gharzouni Olivier Tantot Edson Martinod Sylvie Rossignol |
| author_facet | Ioana Nicoleta Vlasceanu Ameni Gharzouni Olivier Tantot Edson Martinod Sylvie Rossignol |
| author_sort | Ioana Nicoleta Vlasceanu |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T16:20:53Z |
| format | Article |
| id | doaj.art-c398147bd692412bba59943e09ea297d |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T16:20:53Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-c398147bd692412bba59943e09ea297d2023-11-20T13:43:47ZengMDPI AGMolecules1420-30492020-09-012518421810.3390/molecules25184218Geopolymer Carbon-Based for Ultra-Wideband Absorbent ApplicationsIoana Nicoleta Vlasceanu0Ameni Gharzouni1Olivier Tantot2Edson Martinod3Sylvie Rossignol4IRCER—Institut de Recherche sur les Céramiques, UMR CNRS 7315, 12 Rue Atlantis, 87068 CEDEX Limoges, FranceIRCER—Institut de Recherche sur les Céramiques, UMR CNRS 7315, 12 Rue Atlantis, 87068 CEDEX Limoges, FranceXLIM, UMR CNRS 7252, 123 Avenue Albert Thomas, 87060 CEDEX Limoges, FranceXLIM, UMR CNRS 7252, 16 Rue Jules Vallès, 19100 Brive La Gaillarde, FranceIRCER—Institut de Recherche sur les Céramiques, UMR CNRS 7315, 12 Rue Atlantis, 87068 CEDEX Limoges, FranceDimension 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.https://www.mdpi.com/1420-3049/25/18/4218geopolymerdielectric propertiesabsorbentfoamsurfactantspore size |
| spellingShingle | Ioana Nicoleta Vlasceanu Ameni Gharzouni Olivier Tantot Edson Martinod Sylvie Rossignol Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications Molecules geopolymer dielectric properties absorbent foam surfactants pore size |
| 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 | geopolymer dielectric properties absorbent foam surfactants pore size |
| url | https://www.mdpi.com/1420-3049/25/18/4218 |
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