Investigation of the influence of functional additives based on carbon nanotubes for density of mineral motor oil

Abstract

Functional additives are used to improve the operating characteristic of petroleum products. Additives improve coefficient of friction, oxidation resistance and other characteristics. Carbon nanotubes are the most promising material that will achieve this effect. For engine oil, one of the main characteristics is its density. Insufficient value of the density of the engine oil leads to a rapid flow of fluid into the crankcase, insufficient lubrication of all engine gaps. As a result of poor lubrication there is increased wear of parts and mechanisms. The effect of adding carbon nanotubes to mineral motor oil on its density was studied. The density of the oil product was measured using a general purpose hydrometers with a measuring range of 820-890 kg/m3 and a dividing price of 2 kg/m3. The concentration of carbon nanotubes varied from 0.1 to 0.5 %. Mineral motor oil density was measured before and after aging. The addition of carbon nanotubes to motor oil-based composite mixtures results in a positive effect on the lubricant density value. For mineral motor oils, it is most effective to add carbon nanotubes in an amount of 0.01 or 0.5%. For semi-synthetic oils, the optimal amount of carbon nanotubes is 0.01 and 0.1%. For synthetic oils, the addition of carbon nanotubes in ratios of 0.01; 0.1; 0.5% increases the density value.