Low-viscosity oligoether esters(OEEs)as high-efficiency lubricating oils:Insight on their structure‒lubricity relationship  

作　　者：Hanwen WANG Ying WANG Ping WEN Lin MA Mingjin FAN Rui DONG Chunhua ZHANG 

机构地区：[1]Shaanxi Key Laboratory of Phytochemistry,College of Chemistry&Chemical Engineering,Baoji University of Arts and Sciences,Baoji 721013,China [2]Key Laboratory of Shaanxi Province for Development and Application of New Transportation Energy,Chang’an University,Xi’an 710064,China

出　　处：《Friction》2024年第6期1133-1153,共21页摩擦（英文版）

基　　金：the National Natural Science Foundation of China(No.52175156);the Key Research and Development Projects of Shaanxi Province(No.2021GY-157);the Young Talent fund of University Association for Science and Technology in Shaanxi(No.20220615);the Special Fund for Basic Scientific Research of Central Colleges(Chang an University)with Nos.300102221512,300102221510,and 300102222502.

摘　　要：Development of energy-efficient lubricants is a way to reduce energy consumption for transportation,with the tendency to design molecules that are beneficial in reducing the viscosity of synthetic oils.Oligoether esters(OEEs),as a low-viscosity ester base oil,have characteristics such as simple synthesis and excellent lubrication effect;however,the application of OEEs in tribology field has rarely been investigated.The objective of the present study is to investigate the effect of structure on the lubricating performance of OEEs and to develop a predictive model for OEEs based on quantitative structure‒property relationship(QSPR)through a combination of experiment and statistical modeling.Results showed that glycol chains contribute positively to lubrication with the ether functional groups increasing the sites of adsorption.Compared to branched-chain OEEs,straight-chain OEEs exhibited reduced wear,which was mainly due to the thicker adsorption film formed by the straight-chain structure.Furthermore,carbon films were detected on lightly worn surfaces,indicating that OEEs underwent oxidation during the friction process.Based on the results of principal component analysis(PCA)and partial least squares(PLS),it could be found that the predictive models of viscosity‒temperature performance,thermal stability performance,coefficient of friction(COF),and wear volume(WV)performed well and robustly.Among them,COF and WV can be best predicted with an R^(2) of about 0.90.

关 键 词：oligoether esters(OEEs) low-viscosity ester friction wear quantitative structure-property relationship(QSPR) 

分 类 号：TH117[机械工程—机械设计及理论]