VISCOSITY AND DENSITY OF ALUMINUM OXIDE NANOLUBRICANT
Mark A. Kedzierski
This paper presents liquid kinematic viscosity and density measurements of a synthetic polyolester-based aluminum oxide (Al2O3) nanoparticle dispersion (nanolubricant) at atmospheric pressure over the temperature range 288 K to 318 K. The polyolester was a commercially available chiller lubricant. Two Al2O3 particles diameters were investigated: approximately 60 nm and 10 nm. A good dispersion of the spherical nanoparticles in the lubricant was maintained with a surfactant. Viscosity and density measurements were made for the neat lubricant along with twelve nanolubricants with differing nanoparticle and surfactant mass fractions. The viscosity and the density were shown to increase with respect to increasing nanoparticle mass fraction. The viscosity increased or decreased with surfactant mass fraction depending on the temperature. Correlations of the viscosity and the density are presented as a function of temperature, and nanoparticle and surfactant concentration. The viscosity was also correlated with respect to nanoparticle diameter. The measurements are important for the design of nanolubricants for heat transfer and flow applications.
The 23rd IIR International Congress of Refrigeration
VISCOSITY AND DENSITY OF ALUMINUM OXIDE NANOLUBRICANT, The 23rd IIR International Congress of Refrigeration, Prague, -1, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907722
(Accessed February 22, 2024)