An experimental study of novel nanofluids based on deep eutectic solvents (DESs) by Choline chloride and ethylene glycol

In this work, the preparation and characterization of some new nanofluids based on deep eutectic solvents (DESs) consisting a hydrogen bond acceptor, ethylene glycol (EG), donor, choline chloride (ChCl), as well water, are presented. The were designed by dispersion spherical MgO nanoparticles in four different DESs, ChCl:EG (molar ratio 1:2), 1ChCl:5EG, 1ChCl:2EG:2Water, 1ChCl:5EG:2Water. stability was carried out measuring size distribution for five days, which discovered best results obtained with dispersed DES 1ChCl:5EG. Thermophysical properties (thermal conductivity density) measured influence nanoparticles’ mass fraction, temperature, water content all examined. acquired outcomes revealed that trend density reducing increment temperature since pure base fluids DES-based 1.3% decrement recorded, averagely (the decline sharper case 1ChCl:5EG its nanofluids). thermal almost constant during range 283.15–333.15 K. It confirmed conductivities prepared DESs higher comparison to ones without concentration could promote conductivity. greatest enhancement gained at 10 wt% suspended 1ChCl:2EG. isobaric expansivity also determined temperatures. Eventually, general conclusions drawn concerning results, MgO/DES 1ChCl:2EG introduced most efficient.