Experimental study on thermophysical properties of alumina nanoparticle enhanced ionic liquids
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Date
2019-07-07
Journal Title
Journal ISSN
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Publisher
Journal of Molecular Liquids
Abstract
In this experimental study, several alumina Nanoparticle Enhanced Ionic Liquids were
prepared and studied in regard to their stability, pH, density and thermal conductivity. These
new fluids were manufactured by dispersing aluminium oxide nanoparticles in different
mixtures based on water and 1-ethyl-3-methylimidazolium methanesulfonate ionic liquid.
Furthermore, thermophysical properties (density, thermal conductivity) of pure and binary
mixtures with water and 1-ethyl-3-methylimidazolium methanesulfonate were studied in order
to select and propose base fluids to design new advanced heat transfer fluids. The pH of the
dispersions was determined as around 8.0 - 8.5. In regard to density, the overall
[C2mim][CH3SO3] density is higher by 25% than that of water and the influence of ionic
liquid density over the mixtures was found to be much higher than that of water, while for the
alumina Nanoparticle Enhanced Ionic Liquids the density respects classical equations.
Evaluation of thermal conductivity revealed an increase of up to 13% in thermal conductivity
when nanoparticles are added to the base fluids and new correlations based on mass fraction
and temperature were proposed.