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Preparation of borate ester and evaluation of its tribological properties as an additive in different base oils
Author(s) -
Jin Fengjie,
Yang Guangbin,
Peng Yi,
Zhang Shengmao,
Yu Laigui,
Zhang Pingyu
Publication year - 2016
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1343
Subject(s) - lubricant , base oil , materials science , rubbing , tribology , base (topology) , olefin fiber , boron , x ray photoelectron spectroscopy , chemical engineering , metal , ether , organic chemistry , polymer chemistry , chemistry , metallurgy , composite material , polymer , scanning electron microscope , mathematical analysis , mathematics , engineering
N‐containing borate ester (MEBE) with five‐member ring structure as a lubricant additive was synthesised. The tribological properties in liquid paraffin (LP), poly‐alpha‐olefin (PAO) and dioctyl sebacate (DOS) were evaluated, and the action mechanisms in different base oils were also explored. It was found that as‐synthesised borate ester possesses excellent antiwear performance in LP and PAO. XPS analysis suggests that the additive forms a protective film on the rubbing surfaces which is composed of BN, Fe 2 O 3 , polyoxyethylene ether and N‐containing organic compounds. The inorganic and organic protective films in the metal surface effectively improve the antiwear ability of the base stock. However, when the additive MEBE was introducted into DOS base oil which is prone to adsorbing to the metal surface because of the high polarity of DOS, it influences the compactness of the film formed by the DOS, resulting in weak antiwear property. Copyright © 2016 John Wiley & Sons, Ltd.