Abstract
Currently, vegetable oils have been studied as biolubricants in order to reach new environmental standards. Besides being non-renewable, mineral oils from petroleum bring consequences to the environment due to its low biodegradability. Thus, the aim of this work is to develop a biolubricant and to add oxide nanoparticles (ZnO and CuO) in order to improve abrasion resistance and friction. This product must be biodegradable and has better performance under boundary lubrication. The methodology consisted of the synthesis of biolubricants using vegetable oils (soybean and sunflower) by epoxidation reaction. The tribological performance was evaluated by HFRR (High Frequency Reciprocating Rig). The developed biolubricants showed good tribological properties besides being more adapted to the environment. Also, it was possible to verify that biolubricants without additives are slightly more tribologically effective than lubricants with additives.
Highlights
Most lubricants available on the market are mineralbased and synthetics
Due to serious environmental impacts caused by them, new alternatives have been researched to replace mineral based lubricants and synthetic bases by the renewable ones that are less harmful to the environment
The epoxidized sunflower oils and additives obtained less wear, mainly sunflower biolubricant without additives with approximately 180 micrometers. This current work has focused on the synthesis of biolubricant from epoxidized vegetable oil and evaluating the addition of oxides nanoparticles in this lubricant
Summary
Most lubricants available on the market are mineralbased and synthetics. These lubricant oils are effective in lubrication but they are not environmentally friendly. Due to serious environmental impacts caused by them, new alternatives have been researched to replace mineral based lubricants and synthetic bases by the renewable ones that are less harmful to the environment. One of these new alternatives is the chemically modified vegetable oils due to their non-toxic and renewable character and their good lubrication properties[1]. The conventional EP additives are sulfur, chlorine and phosphorous These EP additives prevent high wear caused by contact between metal to metal under high loads[4]. These additives are showing some restrictions on its use due to their environmental impacts
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