A study of acoustical parameters of cupric oxide nanoparticles dispersed in aqueous solutions of various glycols

Abstract

In this study cupric oxide (CuO) nanoparticles were synthesised by precipitation method using                    cupric acetate dihydrate [Cu(CH₃COO)₂.2H₂O] as a starting material. The synthesised nanoparticles were characterised by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). These nanoparticles were dispersed in three different base fluids which were 10% aqueous solutions of ethylene glycol (EG), propylene glycol (PG) and hexylene glycol (HG). Ultrasonic velocity (U), density (ρ) and viscosity (η) of these nanofluids were measured at different concentrations of CuO nanoparticles as a function of temperatures (T = 303.15K, 308.15K and 313.15 K). Using these values various acoustical parameters such as adiabatic compressibility, intermolecular free length, relaxation time, acoustic impedence and attenuation coefficient were evaluated.