RT journal article
T1 Interface chemistry effects in nanofluids: Experimental and computational study of oil-based nanofluids with gold nanoplates
A1 Carrillo Berdugo, Iván
A1 Sampalo Guzmán, Javier
A1 Grau Crespo, Ricardo
A1 Zorrilla Cuenca, David
A1 Navas Pineda, Francisco Javier
A2 Química Física
K1 Nanofluids
K1 Specific heat
K1 Thermal conductivity
K1 Surface interactions
AB The chemistry of interfaces and its relation with energy storage at and transport through solid-liquid interfaces in heat transfer nanofluids is a very unexplored terrain. Here we discuss how the magnitude of the changes in specific heat and thermal conductivity of the base fluid, upon dispersion of a nanoma-terial, depends on the surface chemistry of that nanomaterial. We focus on nanofluids with Au nanoplates from an integrated experimental and theoretical perspective, and compared our findings with those pre-viously reported for nanofluids with Pd nanoplates in the same base fluid. Pd and Au are known to have different surface chemistry, and so are the structures of the solid-liquid interfaces and the thermal prop-erties of these nanofluids. It was experimentally found that for mass fractions in the order of 0.01 wt%, Pd and Au nanoplates provide enhancements of 5.9% and 1.6% in specific heat, and enhancements of 12.5% and 17.9% in thermal conductivity, at 373 K. It was verified using density functional theory and classical molecular dynamics simulations that base fluid molecules can chemisorb on Pd surfaces, but not on Au surfaces. This work suggests that the stronger interactions between species at solid-liquid interfaces, the higher the specific heat enhancements and the lower the thermal conductivity enhancements at high temperature.(c) 2022 The Author(s). Published by Elsevier B.V.
PB ELSEVIER
SN 0167-7322
YR 2022
FD 2022-09
LK http://hdl.handle.net/10498/27272
UL http://hdl.handle.net/10498/27272
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026