Experimental comparison of the effect of biological nanoparticles and titanium oxide metal nanoparticles on the tribological properties of biological lubricants

In this study, the performance of biochar and titanium dioxide nanoparticles in combination with epoxidized soybean oil as a biolubricant is investigated. biochar nanoparticles were produced from sugarcane bagasse coal using the ball mill. Then, after the production of biochar nanoparticles, in order to check their quality and size, samples are photographed using a scanning electron microscope. Titanium dioxide nanoparticles were also prepared commercially. In the next step, nanoparticles with weight percentages of 0.1, 0.2, and 0.5 were combined with biological fluid, after ensuring the stability of the nanofluid, the prepared samples were tested to determine the wear and friction properties. The results show the friction coefficient changes for nano titanium dioxide fluids are better than nano biochar lubricants. At the concentration of 0.1, the average friction coefficient of titanium dioxide nanoparticles was recorded as 0.092 and nano biochar as 0.115. For titanium dioxide and nano-biochar with a concentration of 0.2, it is 0.067 and 0.143, respectively, and for a concentration of 0.5, it is 0.064 and 0.111, respectively. The results of the wear test also show the wear rate of nano-lubricant discs with concentrations of 0.1, 0.2, and 0.5 containing titanium dioxide compared to nanobiochar 24.65, 35.43, and 85.48% is decreased respectively.