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Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability

In this study, the thermophysical properties and dispersion stability of graphene-based nanofluids were investigated. This was conducted to determine the influence of fabrication temperature, nanomaterial concentration, and surfactant ratio on the suspension effective properties and stability condit...

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Detalles Bibliográficos
Autor principal: Ali, Naser
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838429/
https://www.ncbi.nlm.nih.gov/pubmed/35159702
http://dx.doi.org/10.3390/nano12030357
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author Ali, Naser
author_facet Ali, Naser
author_sort Ali, Naser
collection PubMed
description In this study, the thermophysical properties and dispersion stability of graphene-based nanofluids were investigated. This was conducted to determine the influence of fabrication temperature, nanomaterial concentration, and surfactant ratio on the suspension effective properties and stability condition. First, the nanopowder was characterized in terms of crystalline structure and size, morphology, and elemental content. Next, the suspensions were produced at 10 °C to 70 °C using different concentrations of surfactants and nanomaterials. Then, the thermophysical properties and physical stability of the nanofluids were determined. The density of the prepared nanofluids was found to be higher than their base fluid, but this property showed a decrease with the increase in fabrication temperature. Moreover, the specific heat capacity showed very high sensitivity toward the graphene and surfactant concentrations, where 28.12% reduction in the property was achieved. Furthermore, the preparation temperature was shown to be the primary parameter that effects the nanofluid viscosity and thermal conductivity, causing a maximum reduction of ~4.9% in viscosity and ~125.72% increase in thermal conductivity. As for the surfactant, using low concentration demonstrated a short-term stabilization capability, whereas a 1:1 weight ratio of graphene to surfactant and higher caused the dispersion to be physically stable for 45 consecutive days. The findings of this work are believed to be beneficial for further research investigations on thermal applications of moderate temperatures.
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spelling pubmed-88384292022-02-13 Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability Ali, Naser Nanomaterials (Basel) Article In this study, the thermophysical properties and dispersion stability of graphene-based nanofluids were investigated. This was conducted to determine the influence of fabrication temperature, nanomaterial concentration, and surfactant ratio on the suspension effective properties and stability condition. First, the nanopowder was characterized in terms of crystalline structure and size, morphology, and elemental content. Next, the suspensions were produced at 10 °C to 70 °C using different concentrations of surfactants and nanomaterials. Then, the thermophysical properties and physical stability of the nanofluids were determined. The density of the prepared nanofluids was found to be higher than their base fluid, but this property showed a decrease with the increase in fabrication temperature. Moreover, the specific heat capacity showed very high sensitivity toward the graphene and surfactant concentrations, where 28.12% reduction in the property was achieved. Furthermore, the preparation temperature was shown to be the primary parameter that effects the nanofluid viscosity and thermal conductivity, causing a maximum reduction of ~4.9% in viscosity and ~125.72% increase in thermal conductivity. As for the surfactant, using low concentration demonstrated a short-term stabilization capability, whereas a 1:1 weight ratio of graphene to surfactant and higher caused the dispersion to be physically stable for 45 consecutive days. The findings of this work are believed to be beneficial for further research investigations on thermal applications of moderate temperatures. MDPI 2022-01-22 /pmc/articles/PMC8838429/ /pubmed/35159702 http://dx.doi.org/10.3390/nano12030357 Text en © 2022 by the author. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ali, Naser
Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability
title Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability
title_full Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability
title_fullStr Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability
title_full_unstemmed Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability
title_short Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability
title_sort graphene-based nanofluids: production parameter effects on thermophysical properties and dispersion stability
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838429/
https://www.ncbi.nlm.nih.gov/pubmed/35159702
http://dx.doi.org/10.3390/nano12030357
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