Tribological properties of hexagonal boron nitride nanoparticles or graphene nanoplatelets blended with an ionic liquid as additives of an ester base oil

Antifriction synergies between an ionic liquid (IL) and nanopowders as additives of ester base oil were analysed at rolling conditions. For this aim, two nanodispersions based on hybrid combinations hexagonal boron nitride nanoparticles (h-BN) or graphene nanoplatelets (GnP) with tri(butyl) ethylphosphonium diethylphosphate in triisotridecyltrimellitate (TTM) the mixture TTM IL using tribometer techniques. Film thickness characterisation tribological tests performed conditions [5% slide-roll-ratio (SRR)], under 50N operating temperatures 30, 50 80°C. Stribeck curves showed that friction coefficients for prepared lubricants are lower than those found TTM, being best behaviour GnP nanolubricant. Furthermore, torque loss ball bearings, observing nanolubricants values obtained.