Interactions between organic friction modifier additives
| Autor: | Benjamin M. Fry, Janet S.S. Wong, Mang Yin Chui, Gareth Moody |
|---|---|
| Přispěvatelé: | Croda Europe Limited |
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Mechanical Engineering Carboxylic acid fungi Friction modifier 02 engineering and technology Surfaces and Interfaces Tribology Hexadecane 021001 nanoscience & nanotechnology 0910 Manufacturing Engineering Surfaces Coatings and Films chemistry.chemical_compound Hydrolysis Oleic acid 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Chemical engineering Mechanics of Materials Oleylamine Ionic liquid Mechanical Engineering & Transports 0210 nano-technology 0913 Mechanical Engineering |
| Popis: | The interactions of different additives in engine oils can create synergistic or antagonistic effects. This paper studies how mixing different organic friction modifier additives affects friction reducing properties of lubricants in the boundary lubrication regime. Amines of different degree of saturation were mixed with either glycerol monooleate (GMO) or oleic acid in hexadecane. The model lubricants thus formed were characterised with Fourier-transform infrared spectroscopy. Friction tests in reciprocating motion using ball-on-disc steel-steel contacts were conducted to examine the tribological performance of these lubricants. Worn surfaces were examined using X-ray photoelectron spectroscopy. Oleic acid and oleylamine, a primary amine. Were found to form a partial ionic liquid, providing synergistic friction reduction. This positive interaction reduces with increasing degree of saturation of the amine. No synergistic effect was observed between GMO and oleylamine,suggesting that GMO does not hydrolyse into a carboxylic acid within a rubbing contact in the presence of amine. Keywords: Boundary Lubrication, Additives, Friction Abbreviations: organic friction modifier (OFM); glycerol monooleate (GMO); ionic liquid (IL); oleylamine (OA); diocylamine (DA); trihexylamine (TA); dimethylhexadecaylamine (DM16); high frequency reciprocating rig (HFRR); X-ray photoelectron spectroscopy (XPS). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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