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| Comparative Analysis of the Friction Characteristics of Graphite enhanced Biolubricants and SAE20W40 Engine Oil |
Tolumoye J Tuaweri, Tolumoye J Ajoko
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Abstract:
Biolubricants are increasingly becoming attractive to researchers due to environmental concerns associated with most conventional lubricants. In this study, the effect of graphite nanoparticles on the friction characteristics of Vegetable oil (V), Palm oil (P) and SAE20W40 engine oil(S) using G.U.N.T. TM 260.01 rolling/sliding disc module is presented. The main parameters considered were graphite concentration in the lubricant, rotational speed of the contact surfaces and applied load. The volume of each lubricant was 50ml and all the investigations were carried out at room temperature for 10 minutes. The results show that friction force decreased with increase in rotational speed for all the lubricants. The coefficient of friction (COF) also decreased with both rotational speed and increasing particle concentration in the lubricants. However, friction force increased with increasing load. The effect of graphite nanoparticles addition into each of the lubricants was more significant for vegetable oil than palm oil and SAE20W40. Lowest friction forces and coefficients of friction were observed at a particle concentration of 2g. In all cases, addition of graphite nanoparticles into the lubricant improved the frictional characteristics of the lubricant, though at different magnitudes
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