Influences of chemical characteristics and nanoadditive participation on raw vegetable oils’ tribological properties

Lubricant formulations play a key role in the friction process of mechanical systems and components. Today, besides good lubricant tribological properties, there are demands concerning the impact of lubricants on environmental pollution. Numerous studies have shown that the use of additives containing microparticles and nanoparticles and/or nanopowder solid materials improve performance of mineral and synthetic lubricating oils, and offer the possibilities of using them as base for developing new lubricant products. The present paper presents the results of experimental investigations regarding MoS 2 (molybdenum disulfide) nanoparticles tribological effects as additive in four raw vegetable oils. Based on obtained results it can be said that the tribological properties of different lubricant mixtures are improved, in direct link with the physicochemical properties of lubricant base (polyunsaturated vs. saturated fatty acid ratio of vegetable oils).