State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China.
ACS Appl Mater Interfaces. 2014 Mar 12;6(5):3233-41. doi: 10.1021/am4049332. Epub 2014 Feb 27.
1-Alkyl-3-methylimidazolium bis(2-ethylhexyl)sulfosuccinate (L-DOSS10n, n = 2, 4, 8) ionic liquids (ILs) were synthesized from dioctyl sodium sulfosuccinate (NaDOSS), which is a cheap, bulk available laxative medicine used for the treatment of constipation. The ILs showed lower corrosion levels and higher hydrolysis stabilities than conventional ILs such as 1-butyl-3-methyl imidazolium tetrafluoroborate (L-B104) and 1-butyl-3-methyl imidazolium bis(trifluoromethylsulfonyl)imide (L-F104) due to their halogen-free characteristic. The tribological properties of the ILs were also better than those of L-B104 and L-F104 for various contacts. Thus, they can be used as replacements for conventional IL lubricants, which may solve the problems of corrosion and high cost to put conventional IL lubricants into industrial application. Coking test results indicated that the synthesized ILs have high deterging ability. Thus, these ILs may be used as lubricants that restrain carbonaceous deposition as well as oil sludge and varnish formation on the metal contacts during the sliding process. Moreover, the synthesized ILs can disperse, loosen, and remove the already formed harmful substances and keep the metal contacts clean.
1-烷基-3-甲基咪唑双（2-乙基己基）磺基琥珀酸盐（L-DOSS10n，n = 2,4,8）离子液体（ILs）是由磺基琥珀酸钠二辛酯（NaDOSS）合成的，磺基琥珀酸钠二辛酯是一种廉价的、大量可用的通便药物，用于治疗便秘。由于其无卤素的特性，与传统的 IL 如 1-丁基-3-甲基咪唑四氟硼酸盐（L-B104）和 1-丁基-3-甲基咪唑双（三氟甲烷磺酰基）亚胺（L-F104）相比，ILs 的腐蚀性和水解稳定性更高。此外，对于各种接触，ILs 的摩擦学性能也优于 L-B104 和 L-F104。因此，它们可以作为传统 IL 润滑剂的替代品，这可能解决腐蚀和成本高的问题，从而将传统 IL 润滑剂应用于工业。积碳试验结果表明，合成的 ILs 具有很强的清净能力。因此，这些 ILs 可以作为润滑剂，在滑动过程中抑制金属接触表面的积碳、油泥和漆膜的形成，同时还可以分散、松动和去除已经形成的有害物质，保持金属接触表面的清洁。
