Preparation and tribological properties of nitrogen-containing heterocyclic ester or amide derivatives
(2.School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, Guangdong, China 523808)
(3.Foshan Delian Automotive Accessories Co., Ltd., Foshan, Guangdong, China 528247)
【Abstract】Four nitrogen heterocyclic ester or amide derivatives based lubricant additives, namely Ⅰ—Ⅳ, were designed and synthesized. The molecular structures were characterized by 1H NMR and MALDI-TOF-MS. The oil solubility, thermal stability and corrosion resistance of these additives were studied. The tribological properties of additives in liquid paraffin (LP) were systematically investigated on a four-ball test machine. The surfaces morphology and elementary composition of the wear scar were recorded on a scanning electron microscope (SEM) and an energy dispersive spectrometer (EDS). The results show that the four additives exhibit excellent oil solubility, high thermal stability and good corrosion resistance. When the addition of additive Ⅰ is 1% (mass fraction), the wear scar diameter (WSD) and coefficient of friction Are 33% and 26% lower than those in non-added liquid paraffin. The SEM images suggest that the addition of all the four additives can significantly reduce WSD and decrease surface wear. The EDS results indicate that the additives form a complex reaction film in the process of friction.
【Keywords】 synthesis; lubricant additive; attrition; surface; tribological properties;
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