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. 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. Viscosity and density correlations 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.
Citation: International Journal of Refrigeration-Revue Internationale Du Froid
Pub Type: Journals