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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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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2022
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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. |
format | Online Article Text |
id | pubmed-8838429 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT alinaser graphenebasednanofluidsproductionparametereffectsonthermophysicalpropertiesanddispersionstability |