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Preparation and tribological properties of nitrogen-containing heterocyclic ester or amide derivatives

YU Lei1,2 DAI Kangxu2 LU Hao2 FANG Yanxiong1 CAO Hua3 HAN Lifen2 ZHAO Hongbin2 LI Shijuan2

(1.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, China 510000)
(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;

【DOI】

【Funds】 Social Science and Technology Development Foundation of Dongguan (2015108101003) Characteristic Innovation Foundation of Ordinary Universities of Guangdong Province (2017KTSCX179, 2015KTSCX136)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 69, No. 09, Pages 4083-4089

September 2018

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Article Outline

Abstract

  • Introduction
  • 1 Experimental materials and methods
  • 2 Experimental results and discussion
  • 3 Conclusion
  • References