文献类型：期刊文献

英文题名：Effect of Nitrogen Atoms Number and Spatial Location on Tribological Properties of Nucleobase Derivatives

作者：Zhang, Haobo[1];Xia, Yanqiu[2];Liu, Xiong[1];Li, Jindu[3];Fan, Xiaoqiang[3]

第一作者：张浩波

通信作者：Zhang, HB[1]

机构：[1]Gansu Univ Chinese Med, Dept Sci, Lanzhou 730000, Peoples R China;[2]North China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing 102206, Peoples R China;[3]Chinese Acad Sci, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China

第一机构：甘肃中医药大学

通信机构：[1]corresponding author), Gansu Univ Chinese Med, Dept Sci, Lanzhou 730000, Peoples R China.|[10735]甘肃中医药大学;

年份：2016

卷号：61

期号：3

外文期刊名：TRIBOLOGY LETTERS

收录：;EI(收录号：20161002072017);Scopus(收录号：2-s2.0-84959136999);WOS:【SCI-EXPANDED(收录号:WOS:000371306600003)】；

基金：The authors would like to thank the financial support for this work by "Provincial Colleges and Universities and Fundamental Research Special (2305136307)" of Gansu Province.

语种：英文

外文关键词：Nucleobase derivatives; Additives; Friction and wear; Lubricant

摘要：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.