Effect of Nitrogen Atoms Number and Spatial Location on Tribological Properties of Nucleobase Derivatives

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• 作者：Haobo Zhang ; Yanqiu Xia ; Xiong Liu ; Jindu Li ; Xiaoqiang Fan
• 关键词：Nucleobase derivatives ; Additives ; Friction and wear ; Lubricant
• 刊名：Tribology Letters
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：61
• 期：3
• 全文大小：1,727 KB
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• 作者单位：Haobo Zhang (1)
  Yanqiu Xia (2)
  Xiong Liu (1)
  Jindu Li (3)
  Xiaoqiang Fan (3)
  
  1. Department of Science, Gansu University of Chinese Medicine, Lanzhou, 730000, People’s Republic of China
  2. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing, 102206, People’s Republic of China
  3. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Tribology, Corrosion and Coatings
  Surfaces and Interfaces and Thin Films
  Theoretical and Applied Mechanics
  Physical Chemistry
  Nanotechnology
  
• 出版者：Springer Netherlands
• ISSN：1573-2711

文摘

Four kinds of ashless, non-phosphorus and non-sulfur oil-soluble compounds of nucleobase derivatives were evaluated as lubricant additives in poly(ethylene glycol) (PEG) for steel–steel contact under room temperature, and their electrochemical corrosion behaviors were measured by Tafel polarization. The morphologies and chemical features of the worn surfaces were investigated by scanning electron microscope and X-ray photoelectron spectroscopy (XPS). The results showed that the nucleobase derivatives as 2 wt% additive show excellent load-carrying capacity, friction-reducing and anti-wear performance. It is also found that the tribological performance of the two purine derivatives is better than that of the two pyridine derivatives. The corrosion behaviors of four PEGs with 2 wt% different nucleobase derivative additives on pure coppers exhibit much better than those of pure PEG. The XPS results indicated the excellent tribological properties are attributed to the formation of tribochemical adsorption and chemical reaction films on the worn surfaces, which may prevent the sliding surfaces from straight asperity contact and markedly improve friction-reducing and anti-wear behaviors.