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Interactions between organic friction modifier additives

机译：有机摩擦改性剂之间的相互作用

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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.
机译：不同添加剂在发动机油中的相互作用可以产生协同或拮抗作用。本文研究了混合不同的有机摩擦改性剂添加剂如何影响边界润滑制度中润滑剂的摩擦降低性能。将不同饱和程度的胺与十六烷烷中的甘油单烯烃（GMO）或油酸混合。由此形成的模型润滑剂具有傅里叶变换红外光谱。进行了使用球形盘钢钢触点的往复运动中的摩擦试验，以检查这些润滑剂的摩擦学性能。使用X射线光电子体光谱检查磨损的表面。未发现油酸和油胺，伯胺形成偏离部分离子液体，提供协同摩擦还原。这种阳性相互作用随着胺的饱和程度的增加而减少。 GMO和OXYLAMINE之间没有观察到协同效应，表明GMO在胺存在下，GMO不会在摩擦接触内水解成羧酸。

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