{"title":"Tribological characteristics and mechanisms of boronitrogenated methyl epoxyoleate as bio‐based additive in petroleum lubricant","authors":"Chengli Tang, Chunyu Song, Siwei Jiang, M. Liao, Fangfang Jie, Boshui Chen","doi":"10.1002/sia.7314","DOIUrl":null,"url":null,"abstract":"In this work, boronitrogenated methyl epoxyoleate (BNMEO) was prepared by boronization and nitrogenation of methyl epoxyoleate (MEO). The tribological properties of BNMEO and MEO as bio‐based lubricating additives in a petroleum oil were determined on a four‐ball tribometer. The topographies, element compositions, and tribochemical species of the worn surfaces were analyzed by a scanning electron microscope, an energy dispersive X‐ray spectrometer, and an X‐ray photoelectron spectroscope, respectively. Results showed that both BNMEO and MEO, especially the former, were excellent in fortifying load‐carrying capacities and friction‐reducing and antiwear abilities of the oil under mild loads. However, their abilities in improving extreme pressure property of the oil under severe loads were very limited. The prominent ability of BNMEO in reducing friction and wear was characterized by well‐increased maximum nonseizure loads and decreased wear scar diameters and friction coefficients and was attributed to generation of a dense and robust boundary lubrication film which consisted of a matrix of BNMEO with inclusions of aminic compounds, boron oxide, iron oxide, and hydrocarbons, thanks to strong adsorptions and tribo‐oxidations of BNMEO on the metallic surfaces in the tribological processes.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surface and Interface Analysis","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/sia.7314","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, boronitrogenated methyl epoxyoleate (BNMEO) was prepared by boronization and nitrogenation of methyl epoxyoleate (MEO). The tribological properties of BNMEO and MEO as bio‐based lubricating additives in a petroleum oil were determined on a four‐ball tribometer. The topographies, element compositions, and tribochemical species of the worn surfaces were analyzed by a scanning electron microscope, an energy dispersive X‐ray spectrometer, and an X‐ray photoelectron spectroscope, respectively. Results showed that both BNMEO and MEO, especially the former, were excellent in fortifying load‐carrying capacities and friction‐reducing and antiwear abilities of the oil under mild loads. However, their abilities in improving extreme pressure property of the oil under severe loads were very limited. The prominent ability of BNMEO in reducing friction and wear was characterized by well‐increased maximum nonseizure loads and decreased wear scar diameters and friction coefficients and was attributed to generation of a dense and robust boundary lubrication film which consisted of a matrix of BNMEO with inclusions of aminic compounds, boron oxide, iron oxide, and hydrocarbons, thanks to strong adsorptions and tribo‐oxidations of BNMEO on the metallic surfaces in the tribological processes.
期刊介绍:
Surface and Interface Analysis is devoted to the publication of papers dealing with the development and application of techniques for the characterization of surfaces, interfaces and thin films. Papers dealing with standardization and quantification are particularly welcome, and also those which deal with the application of these techniques to industrial problems. Papers dealing with the purely theoretical aspects of the technique will also be considered. Review articles will be published; prior consultation with one of the Editors is advised in these cases. Papers must clearly be of scientific value in the field and will be submitted to two independent referees. Contributions must be in English and must not have been published elsewhere, and authors must agree not to communicate the same material for publication to any other journal. Authors are invited to submit their papers for publication to John Watts (UK only), Jose Sanz (Rest of Europe), John T. Grant (all non-European countries, except Japan) or R. Shimizu (Japan only).