Preparation of borate ester and evaluation of its tribological properties as an additive in different base oils

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• 作者：Fengjie Jin ; Guangbin Yang ; Yi Peng ; Shengmao Zhang ; Laigui Yu and Pingyu Zhang
• 刊名：Lubrication Science
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：28
• 期：8
• 页码：505-519
• 全文大小：923K
• ISSN：1557-6833

文摘

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, Fe₂O₃, 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