Lubrication Behavior of Biolubricants and Antiwear Performance of Ionic Liquids

Apr
10
2014
11:00 AM - 12:00 PM
Yan Zhou, Texas A&M University, College Station
Materials Science and Technology Division Seminar
High Temperature Materials Laboratory (Building 4515), Room 265
CONTACT :
Email: Jun Qu
Phone:865.576.9304
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Lubrication behavior of biolubricants and anti-wear performance of ionic liquids The formulation of a new generation of lubricants benefits from studies of often overlooked biolubricants. Developing a new class of more effective anti-wear (AW) lubricant additives is of great interest from both fundamental and practical perspectives in energy savings. This presentation will focus on two topics in tribology: (i) gastropod mucus as a biolubricant and (ii) ionic liquids (ILs) as AW lubricant additives. As an intriguing biological fluid, gastropod mucus has the ability to act as both an adhesive and a lubricant. We found that the water content largely influences its unique lubricating characteristics. Results of molecular dynamics simulation confirmed the hydration lubrication mechanism. In the second part of this presentation, three groups of phosphonium-based ILs containing an organophosphate, carboxylate, or sulfonate anion were characterized for their feasibility as AW oil additives. All selected ILs substantially reduced the wear rate by >80%, and the phosphonium-phosphates were the most effective.

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