Formulation, Stability Analysis And Characterization Of Boric

Abstract

Abstract In the current research work, different concentration of boric acid based engine oil nanofluids has been prepared by using the two-step technique. The distinctive mass concentration of boric acid nanoparticles such as 0.5 wt%, 0.75 wt%, and 1 wt% has been prepared by dispersing in the engine oil 20W40 using magnetic stirrer and ultrasonication bath. The prepared nanofluid has been characterized by using UV-spectroscopy and Thermal Gravimetric Analysis (TGA) for dispersion stability and thermal stability analysis respectively. The boric acid nanoparticles are additionally characterized by using X-ray diffractometer (XRD) for phase, unit cell, and size identification. The scanning electron microscopy (SEM) has been done for its morphology and nanofluid dispersion analysis. The UV spectroscopy analysis reveals that 0.75 wt% boric acid nanofluid shows stable and homogeneous dispersion stability. The TGA analysis shows that thermal stability of 0.75 wt% nanofluid is superior to base oil SAE 20W40 which indicates its utilization in heat transfer applications. The XRD analysis indicates that the nanoparticles are crystalline in nature and belongs to the boric acid phase only with a mean particle size of 49 nm. The SEM analysis shows that boric acid nanoparticles are spherical in nature and show agglomerated nature.