Halogen-free borate ionic liquids as novel lubricants for tribological applications
Halogen-free borate ionic liquids as novel lubricants for tribological applications
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DOI：
10.1016/j.triboint.2013.08.002
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发表时间：
2013-11
影响因子：
6.2
通讯作者：
V. Totolin;I. Minami;C. Gabler;N. Dörr
中科院分区：
文献类型：
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作者：
V. Totolin;I. Minami;C. Gabler;N. Dörr
离子液体的独特性质使其在合成、催化、电化学和纳米技术等领域有着广泛的应用。它们在几个系统中作为润滑剂的应用已经发现，这些物质能够提供显著的抗磨损保护，并显著降低摩擦，无论它们是作为添加剂使用还是以纯净形式使用。因此，在本工作中，进一步的方法来提供无卤素离子液体作为钢-钢接触的润滑剂进行了讨论。所选择的两种咪唑硼烷离子液体的特殊化学组成允许取代离子液体中通常存在的氟和硫等杂元素。使用Schwing-Reib-Verschleiss（SRV）摩擦计，在边界条件下使用具有球盘几何形状的振荡钢-钢接触，评价了它们的摩擦学性能。与参比含卤素离子液体（用作纯添加剂和润滑剂添加剂）相比，磷酸盐基离子液体的添加显著改善了咪唑钥硼烷离子液体的摩擦学性质。对磨痕的XPS分析证实了磷酸盐基摩擦膜的形成，其显著改善了润滑剂的减摩性能和抗磨性能。
The unique properties of ionic liquids favour their applications in diverse fields, such as synthesis, catalysis, electrochemistry and nanotechnology. Their application as lubricants in several systems has found that these substances are able to provide remarkable protection against wear and significantly reduce friction whether they are used as additives or in the neat form. Therefore, in the present work, a further approach to provide halogen-free ionic liquids as lubricants for steel–steel contacts is discussed. The special chemical compositions of two imidazolium borane ionic liquids selected allowed the replacement of hetero-elements such as fluorine and sulphur that are usually found in ionic liquids. Their tribological properties were evaluated with a Schwing–Reib–Verschleiss (SRV) tribometer using an oscillating steel–steel contact with ball-on-disc geometry under boundary conditions. The addition of a phosphate based ionic liquid significantly improved the tribological properties of the imidazolium borane ionic liquids in comparison to a reference halogen containing ionic liquid (used as neat and lubricant additive). XPS analyses of the wear scars confirmed the formation of a phosphate based tribofilm that significantly improved the friction reducing properties and anti-wear performance of the lubricants.