Volumetric Properties and Surface Tension of Few-Layer Graphene Nanofluids Based on a Commercial Heat Transfer Fluid

Samah Hamze, David Cabaleiro, Dominique Bégin, Alexandre Desforges, Thierry Maré, Brigitte Vigolo, Luis Lugo and Patrice Estellé
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Samah Hamze: Laboratoire de Génie Civil et Génie Mécanique, Université de Rennes, F-35000 Rennes, France
David Cabaleiro: Laboratoire de Génie Civil et Génie Mécanique, Université de Rennes, F-35000 Rennes, France
Dominique Bégin: Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES) CNRS-University of Strasbourg, 25, rue Becquerel, F-67087 Strasbourg Cedex, France
Alexandre Desforges: Institut Jean Lamour UMR7198, Université de Lorraine, CNRS, F-54000 Nancy, France
Thierry Maré: Laboratoire de Génie Civil et Génie Mécanique, Université de Rennes, F-35000 Rennes, France
Brigitte Vigolo: Institut Jean Lamour UMR7198, Université de Lorraine, CNRS, F-54000 Nancy, France
Luis Lugo: Departamento de Física Aplicada, Facultade de Ciencias, Universidade de Vigo, E-36310 Vigo, Spain
Patrice Estellé: Laboratoire de Génie Civil et Génie Mécanique, Université de Rennes, F-35000 Rennes, France

Energies, 2020, vol. 13, issue 13, 1-18

Abstract: Volumetric properties such as density and isobaric thermal expansivity, and surface tension are of paramount importance for nanofluids to evaluate their ability to be used as efficient heat transfer fluids. In this work, the nanofluids are prepared by dispersing few-layer graphene in a commercial heat transfer fluid Tyfocor ® LS (40:60 wt.% propylene-glycol/water) with the aid of three different nonionic surfactants: Triton X-100, Pluronic ® P-123 and Gum Arabic. The density, isobaric thermal expansivity and surface tension of each of the base fluids and nanofluids are evaluated between 283.15 and 323.15 K. The influence of the mass content in few-layer graphene from 0.05 to 0.5% on these nanofluid properties was studied. The density behavior of the different proposed nanofluids is slightly affected by the presence of graphene, and its evolution is well predicted by the weight-average equation depending on the density of each component of the nanofluids. For all the analyzed samples, the isobaric thermal expansivity increases with temperature which can be explained by a weaker degree of cohesion within the fluids. The surface tension evolution of the graphene-based nanofluids is found to be sensitive to the used surfactant, its content and the few-layer graphene concentration.

Keywords: few-layer graphene; propylene-glycol/water; nanofluids; density; surface tension; isobaric thermal expansivity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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