Influence of graphene nano-platelets dispersion on the thermo-physical properties of sunflower oil

Abstract

In this article, thermal stability, viscosity, density and surface tension of Graphene nano-platelets dispersed sunflower oil are experimentally determined by varying the Graphene concentration (0.1-1.1wt%) and temperature (40-100?C). The SEM micrograph and the EDS spectra are used to characterize the Graphene. Nanofluids are prepared by ultrasonication technique (two-step method) and the maximum thermal stability of about 280?C is achieved at 1.1wt% Graphene nanofluids. The dynamic viscosity diminished in an exponential shape in acquiescence with Arrhenius equation and the densities of samples are characteristic with linear decrement in the estimated temperature range. Density and surface tension increases with the Graphene concentration, while a reverse trend is observed with temperature rise. The maximum thermal stability, viscosity, density and surface tension is obtained in the nanofluid with 1.1 wt% concentration and the minimum is obtained in the nanofluid with 0.1 wt% concentration.

Effect of nano-graphene lubricating oil on particulate matter of a diesel engine

“…With the development of nanotechnology, more and more researchers study lubricating oil nano-additives with anti-friction and wear-resisting characteristics, such as soft metals 4 , 5 , metal compounds 6 – 9 , organic compounds 10 , 11 , graphite and its interlayer compounds 12 – 15 , etc. Among them, two-dimensional nano-graphene is more attention 12 , 16 , 17 . A large number of studies 18 – 23 have shown that the tribological properties of general industrial lubricanting oil can be improved by adding nano-graphene to them.…”