YU Lei, DAI Kangxu, LU Hao, et al. Preparation and tribological properties of nitrogen-containing heterocyclic ester or amide derivatives[J]. CIESC Journal, 2018, (9): 4083-4089.
YU Lei, DAI Kangxu, LU Hao, et al. Preparation and tribological properties of nitrogen-containing heterocyclic ester or amide derivatives[J]. CIESC Journal, 2018, (9): 4083-4089.DOI: 10.11949/j.issn.0438-1157.20180284.
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 worn scar were recorded on a scanning electron microscopy (SEM) and an energy dispersive spectroscopy (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 were 33% and 26% which are lower than that 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 formed a complex reaction film in the process of friction.