【摘要】 制备了N-二异辛基-2-苯并噻唑次磺酰胺(DIMB)和2-硫酮-苯并噻唑-3-甲基-巯基乙酸异辛酯(MBES)两种含氮杂环抗磨添加剂,用SRV型高温摩擦磨损试验机评价它们在Ⅲ类基础油中的抗磨减摩性能,对它们在不同条件下形成的摩擦膜进行X射线吸收精细结构光谱(XANES)分析,用原子力显微镜(AFM)分析摩擦膜的表面形貌.结果表明,添加剂DIMB和MBES具有很好的抗磨性能,但没有减摩性能.XANES分析结果表明,添加剂MBES形成的摩擦膜完全由硫酸亚铁组成,而添加剂DIMB形成的摩擦膜的次表面和本体主要由二硫化铁组成,未测量到硫酸盐或硫化铁,但摩擦膜表面部分被氧化成硫酸亚铁.AFM测试结果表明,与含1.5%(w)二烷基二硫代磷酸锌(ZDDP)抗磨添加剂的钢块磨损表面相比较,分别含1.5%(w)DIMB和1.5%(w)MBES添加剂的钢块磨损表面出现了深而宽的“犁沟”.更多还原

【Abstract】 Two ash-less and phosphorous-free nitrogen-containing heterocyclic anti-wear additives (N-di-isooctyl-2-benzothiazolesulfenamide, DIMB and (2-sulfurone-benzothiazole)-3-methyl-isooctyl thiohydroxy acetate, MBES) were synthesized. Their anti-wear and friction-reduction performances as lubricating oil additives in groupⅢ base oil were evaluated using SRV high temperature friction and wear tester. The chemistry of their tribofilms was analyzed with X-ray absorption near-edge spectroscopy (XANES), and atomic force microscopy (AFM) was then used to examine the general morphology of the reaction films. The results showed that the two nitrogen-containing heterocyclic compounds possess rather good anti-wear properties, but no friction-reducing performance. According to the XANES analytic results, the tribofilms generated from the additive MBES were mainly composed of FeSO4, whereas the films generated from the additive DIMB mainly contained FeS2. The AFM images revealed that in comparison with the worn surfaces from zinc dialkyldithiophosphate (ZDDP), the worn surfaces from the additives DIMB and MBES, respectively, presented large and deep grooves.更多还原