Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications.

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ID: 262332
2020
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Abstract
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.
Reference Key
vlasceanu2020geopolymermolecules Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Vlasceanu, Ioana Nicoleta;Gharzouni, Ameni;Tantot, Olivier;Martinod, Edson;Rossignol, Sylvie;
Journal molecules
Year 2020
DOI
E4218
URL
Keywords
surfactants foam geopolymer pore size absorbent dielectric properties

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