ESR 10: Efficient boundary lubrication with bio-based green chemical additives

Objectives: To exploit the synergies between additives from waste oils and fats (WOF) with organometallic ones for powertrain and gear applications. To exploit surface engineering to produce low SAPS “interfaces” that are formed from a combination of organic additives/new surface coating chemistries/higher SAPS additives (with massively reduced concentrations). To understand tribofilm formation with organic additive-containing lubricants and fill the gap left by a higher SAPS additive.

ESR: Ju Shu (China)









I decided to join this programme, because I was interested in my project which studies the application of bio-based materials as lubricant additives.

Previous studies:
Bachelor's degree: Mechanical Engineering, Harbin Institute of Technology, China
Master's degree: Mechatronic Engineering, Harbin Institute of Technology, China

PhD double degree at: University of Leeds & University of Ljubljana

Expected Results: Bio-based lubricant additives (fatty acid glycerol formal esters) developed from waste will be assessed for friction and wear performance. Lowering emissions while retaining and improving fuel economy and minimising lubricant drain intervals and material wear requires complex and often competing surface-active species being present in lubricant- additive packages. A route towards green formulations is to exploit the potential synergies between different types of additives (TOTAL). The project will deliver:

  • Tribological performance of bio-based lubricant organic additives

  • Maps of lubrication performance (friction and wear) for combined organic additive, high-SAPS additive and coating systems

  • Understanding mechanisms by which organic additives can replace S, P additives and provide improved friction and wear performance A route for which low-SAPS lubricants can be used with improved performance