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Development of Reinforced Polyester/Graphene Nanocomposite Showing Tailored Electrical Conductivity

Production process was chosen in order to be readily scalable at the industrial level. The resin/graphene mixture was prepared through high shear mixing at six different weight concentrations between 0% and 10%. Samples were subsequently produced by compression molding. The electrical properties wer...

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Autores principales: Serenari, Federico, Madinehei, Milad, Moghimian, Nima, Fabiani, Davide, David, Eric
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7602174/
https://www.ncbi.nlm.nih.gov/pubmed/33066586
http://dx.doi.org/10.3390/polym12102358
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author Serenari, Federico
Madinehei, Milad
Moghimian, Nima
Fabiani, Davide
David, Eric
author_facet Serenari, Federico
Madinehei, Milad
Moghimian, Nima
Fabiani, Davide
David, Eric
author_sort Serenari, Federico
collection PubMed
description Production process was chosen in order to be readily scalable at the industrial level. The resin/graphene mixture was prepared through high shear mixing at six different weight concentrations between 0% and 10%. Samples were subsequently produced by compression molding. The electrical properties were measured both in-the-plane and across-the-plane using, respectively, a four-point probe and a two-electrode system. The two-electrode system was a dielectric spectrometer, and accordingly, the across-the-plane measurements were conducted in the frequency-domain. Mechanical measurements were conducted using conventional three-point bending and impact setups. The percolation threshold was found to be in the range of 3–5 wt.% concentration, for which the conductivity showed a 7 orders of magnitude increase. These results were quite similar to the samples containing around 50 wt.% of glass fibers. Surprisingly, the in-the-plane conductivity was found to be lower than the bulk conductivity, contrary to what was found with the same filler for thermoplastic composites prepared by melt compounding. No significant increase in mechanical properties as a function of filler loading was observed, except maybe a slight increase in the material toughness.
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spelling pubmed-76021742020-11-01 Development of Reinforced Polyester/Graphene Nanocomposite Showing Tailored Electrical Conductivity Serenari, Federico Madinehei, Milad Moghimian, Nima Fabiani, Davide David, Eric Polymers (Basel) Article Production process was chosen in order to be readily scalable at the industrial level. The resin/graphene mixture was prepared through high shear mixing at six different weight concentrations between 0% and 10%. Samples were subsequently produced by compression molding. The electrical properties were measured both in-the-plane and across-the-plane using, respectively, a four-point probe and a two-electrode system. The two-electrode system was a dielectric spectrometer, and accordingly, the across-the-plane measurements were conducted in the frequency-domain. Mechanical measurements were conducted using conventional three-point bending and impact setups. The percolation threshold was found to be in the range of 3–5 wt.% concentration, for which the conductivity showed a 7 orders of magnitude increase. These results were quite similar to the samples containing around 50 wt.% of glass fibers. Surprisingly, the in-the-plane conductivity was found to be lower than the bulk conductivity, contrary to what was found with the same filler for thermoplastic composites prepared by melt compounding. No significant increase in mechanical properties as a function of filler loading was observed, except maybe a slight increase in the material toughness. MDPI 2020-10-14 /pmc/articles/PMC7602174/ /pubmed/33066586 http://dx.doi.org/10.3390/polym12102358 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
Serenari, Federico
Madinehei, Milad
Moghimian, Nima
Fabiani, Davide
David, Eric
Development of Reinforced Polyester/Graphene Nanocomposite Showing Tailored Electrical Conductivity
title Development of Reinforced Polyester/Graphene Nanocomposite Showing Tailored Electrical Conductivity
title_full Development of Reinforced Polyester/Graphene Nanocomposite Showing Tailored Electrical Conductivity
title_fullStr Development of Reinforced Polyester/Graphene Nanocomposite Showing Tailored Electrical Conductivity
title_full_unstemmed Development of Reinforced Polyester/Graphene Nanocomposite Showing Tailored Electrical Conductivity
title_short Development of Reinforced Polyester/Graphene Nanocomposite Showing Tailored Electrical Conductivity
title_sort development of reinforced polyester/graphene nanocomposite showing tailored electrical conductivity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7602174/
https://www.ncbi.nlm.nih.gov/pubmed/33066586
http://dx.doi.org/10.3390/polym12102358
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