巯基苯并噻唑类离子液体在酯类润滑油中的抗氧化性能及摩擦学性能研究  

Antioxidation and Tribological Properties of 2-Mercaptobenzothiazolate Based Ionic Liquids in Ester Oil

作　　者：常淑梅 叶春林 方洪岭 李毅[2,4] 杨慧敏 胡丽天 张松伟[2,4] CHANG Shumei;YE Chunlin;FANG Hongling;LI Yi;YANG Huimin;HU Litian;ZHANG Songwei(School of Chemistry and Chemical Engineering,Inner Mongolia University of Science&Technology,Inner Mongolia Baotou 014010,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Qingdao Center of Resource Chemistry&New Materials,Shandong Qingdao 266071,China)

机构地区：[1]内蒙古科技大学化学与化工学院,内蒙古包头014010 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [3]中国科学院大学材料与光电研究中心,北京100049 [4]青岛市资源化学与新材料研究中心,山东青岛266071

出　　处：《摩擦学学报》2023年第3期256-262,共7页Tribology

基　　金：国家自然科学基金项目(51975559,21902080)资助.

摘　　要：本文中合成两种季鏻盐巯基苯并噻唑类离子液体,以传统多功能添加剂ZDDP为参照,对比考察离子液体在酯类润滑油中的抗氧化性能和摩擦学性能.旋转氧弹测试结果表明,两种多功能离子液体能够显著提升酯类油的氧化诱导期,且效果优于ZDDP,表现出优异的抗氧化性能;摩擦学测试结果表明,两种离子液体都能够降低酯类油的摩擦系数和磨损量,表现出优异的减摩抗磨性能.磨损表面分析发现,摩擦过程中离子液体在表面发生摩擦化学反应,生成具有低剪切性能的含S摩擦化学产物,进而起到减摩抗磨作用.所合成的季鏻盐巯基苯并噻唑类离子液体兼具抗氧化性能和减摩抗磨性能,是一种可用于酯类润滑油的多功能添加剂.In this study,two 2-mercaptobenzothiazolate based phosphonium ionic liquids were synthesized.The antioxidation and tribological properties of these ionic liquids in dioctyl sebacate(DOS)base oil were investigated by comparison with traditional additive ZDDP.Thermogravimetric analysis(TGA)test was conducted to investigate the thermal stabilities of ionic liquids.The test results showed that the thermal decomposition temperatures of P8 and P10 ionic liquids were higher than that of DOS ester oil,indicating that both ionic liquids had high thermal stability.Rotating bomb oxidation tests were utilized to investigate the antioxidation properties of two ionic liquids in DOS base oil according to the standard methods.The results showed that two ionic liquids possessed high antioxidation performances.They could prolong the oxidation induction time of base oil significantly even at a low concentration of 0.5%.And the enhancement effects were better than that the traditional additive ZDDP.When the concentrations of the two ionic liquids increased from 0.5%to 1%,the oxidation stabilities of oil samples were significantly increased.In addition,the oxidation induction time of P8 ionic liquid was longer than that of P10 ionic liquid,indicating that P8 ionic liquid had better antioxidation performance.The excellent antioxidation performances of two ionic liquids were attributed to the chelation of 2-mercaptobenzothiazolate anion with copper ions.The formation of chelate reduced the catalytic oxidation rate,which further improved the oxidation stability of oil sample.The extreme pressure properties of two ionic liquids in DOS base oil were investigated by standard methods.The P_(B) values of oil samples with different additives were tested.The results indicated that two ionic liquids showed better extreme pressure performances than ZDDP at both concentrations of 0.5%and 1%.P8 ionic liquid obtained the highest values of P_(B) at the concentrations of 1%,indicating the highest extreme pressure performance.Tribological experiments

关 键 词：离子液体 多功能添加剂 酯类油 抗氧化性能 减摩抗磨性能 

分 类 号：TH117.1[机械工程—机械设计及理论]