The Effect of Ag-Decoration on rGO/Water Nanofluid Thermal Conductivity and Viscosity

Lozano-Steinmetz, Felipe; Martínez, Victor A.; Vasco, Diego A.; Sepúlveda-Mualin, Alonso; Singh, Dinesh Patrap

doi:10.3390/nano12071095

Open AccessArticle

The Effect of Ag-Decoration on rGO/Water Nanofluid Thermal Conductivity and Viscosity

by

Felipe Lozano-Steinmetz

¹

,

Victor A. Martínez

¹

,

Diego A. Vasco

^1,*

,

Alonso Sepúlveda-Mualin

² and

Dinesh Patrap Singh

²

¹

Department of Mechanical Engineering, Faculty of Engineering, University of Santiago of Chile (USACH), Av. Lib. Bdo. O’Higgins 3363, Estación Central, Santiago 9170022, Chile

²

Millennium Institute for Research in Optics (MIRO), Physics Department, Faculty of Science, University of Santiago of Chile (USACH), Av. Víctor Jara 3493, Estación Central, Santiago 9170124, Chile

^*

Author to whom correspondence should be addressed.

Nanomaterials 2022, 12(7), 1095; https://doi.org/10.3390/nano12071095

Submission received: 25 February 2022 / Revised: 16 March 2022 / Accepted: 24 March 2022 / Published: 26 March 2022

(This article belongs to the Special Issue Nanotechnology for Heat Transfer and Storage)

Download

Browse Figures

Versions Notes

Abstract

Carbon-based nanomaterials have a high thermal conductivity, which can be exploited to prepare nanofluids. Graphene is a hydrophobic substance, and consequently, graphene-based nanofluid stability is improved by adding surfactants. An attractive alternative is the decoration of reduced graphene oxide (rGO) with metallic materials to improve the thermal conductivity without affecting the stability of nanofluids. This study focuses on the synthesis and characterization of rGO/Ag (0.1 wt.%) aqueous nanofluids. Moreover, the effects of the Ag concentration (0.01–1 M) on the thermal conductivity and viscosity during the synthesis of rGO/Ag composite are analyzed. The nanofluid thermal conductivity showed increases in relation to the base fluid, the most promising being 28.43 and 26.25% for 0.1 and 1 M of Ag, respectively. Furthermore, the nanofluids were Newtonian in the analyzed range of shear rates and presented a moderate increase (<11%) in viscosity. Aqueous nanofluids based on rGO/Ag nanocomposites are a potential alternative for applications as heat transfer fluids.

Keywords: nanofluids; reduced graphene oxide; Ag decoration

Graphical Abstract

Share and Cite

MDPI and ACS Style

Lozano-Steinmetz, F.; Martínez, V.A.; Vasco, D.A.; Sepúlveda-Mualin, A.; Singh, D.P. The Effect of Ag-Decoration on rGO/Water Nanofluid Thermal Conductivity and Viscosity. Nanomaterials 2022, 12, 1095. https://doi.org/10.3390/nano12071095

AMA Style

Lozano-Steinmetz F, Martínez VA, Vasco DA, Sepúlveda-Mualin A, Singh DP. The Effect of Ag-Decoration on rGO/Water Nanofluid Thermal Conductivity and Viscosity. Nanomaterials. 2022; 12(7):1095. https://doi.org/10.3390/nano12071095

Chicago/Turabian Style

Lozano-Steinmetz, Felipe, Victor A. Martínez, Diego A. Vasco, Alonso Sepúlveda-Mualin, and Dinesh Patrap Singh. 2022. "The Effect of Ag-Decoration on rGO/Water Nanofluid Thermal Conductivity and Viscosity" Nanomaterials 12, no. 7: 1095. https://doi.org/10.3390/nano12071095

APA Style

Lozano-Steinmetz, F., Martínez, V. A., Vasco, D. A., Sepúlveda-Mualin, A., & Singh, D. P. (2022). The Effect of Ag-Decoration on rGO/Water Nanofluid Thermal Conductivity and Viscosity. Nanomaterials, 12(7), 1095. https://doi.org/10.3390/nano12071095

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

The Effect of Ag-Decoration on rGO/Water Nanofluid Thermal Conductivity and Viscosity

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI