Although ionic liquids have been studied as self-assembly media, the aggregation of fluorinated surfactants in ionic liquids has not been fully understood. In this work, the aggregation behavior of the fluorinated surfactant, N-ethylperfluorooctane sulfonamide (N-EtFOSA), in the aprotic ionic liquid, 1-ethyl-3-methylimidazolium ethylsulfate ([C 2 mim][EtSO 4 ]), was studied using surface tension, 19 F-NMR, dynamic light scattering (DLS), and cryo transmission electron microscopy (cryo-TEM). The surface properties and thermodynamic parameters were calculated based on the results of surface tension measurements. It was found that the fluorinated surfactant exhibits a considerable surface activity in aprotic ionic liquids, and its critical micelle concentration (cmc) increases with increasing temperature. In addition, the surface properties indicate that solvophobic interactions are the main driving force for micelle formation. The thermodynamic parameters for micelle formation derived from the temperature dependence of the cmc revealed that micelle formation is an enthalpy-driven process. DLS and cryo-TEM results indicated the presence of nanoscale micelles in the N-EtFOSA + [C 2 mim][EtSO 4 ] system. The results of this work imply that this fluorinated surfactant exhibits a more pronounced surface activity than conventional hydrocarbon surfactants in [C 2 mim][EtSO 4 ]. Graphical abstract The self-assembly of fluorinated surfactants in aprotic ionic liquids

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含氟表面活性剂在离子液体中的聚集行为

尽管离子液体已被研究为自组装介质，但离子液体中氟化表面活性剂的聚集尚未完全了解。在这项工作中，研究了含氟表面活性剂 N-乙基全氟辛烷磺酰胺 (N-EtFOSA) 在非质子离子液体 1-乙基-3-甲基咪唑乙基硫酸盐 ([C 2 mim][EtSO 4 ]) 中的聚集行为。使用表面张力、 19 F-NMR、动态光散射 (DLS) 和低温透射电子显微镜 (cryo-TEM)。基于表面张力测量结果计算表面性质和热力学参数。发现氟化表面活性剂在非质子离子液体中表现出相当大的表面活性，其临界胶束浓度（cmc）随温度升高而增加。此外，表面特性表明疏溶剂相互作用是胶束形成的主要驱动力。从 cmc 的温度依赖性得出的胶束形成的热力学参数表明胶束形成是一个焓驱动的过程。DLS 和冷冻 TEM 结果表明 N-EtFOSA + [C 2 mim][EtSO 4 ] 系统中存在纳米级胶束。这项工作的结果表明，这种氟化表面活性剂在 [C 2 mim] [EtSO 4 ] 中表现出比传统烃类表面活性剂更显着的表面活性。图形摘要非质子离子液体中氟化表面活性剂的自组装 从 cmc 的温度依赖性得出的胶束形成的热力学参数表明胶束形成是一个焓驱动的过程。DLS 和冷冻 TEM 结果表明 N-EtFOSA + [C 2 mim][EtSO 4 ] 系统中存在纳米级胶束。这项工作的结果表明，这种氟化表面活性剂在 [C 2 mim] [EtSO 4 ] 中表现出比传统烃类表面活性剂更显着的表面活性。图形摘要非质子离子液体中氟化表面活性剂的自组装 从 cmc 的温度依赖性得出的胶束形成的热力学参数表明胶束形成是一个焓驱动的过程。DLS 和冷冻 TEM 结果表明 N-EtFOSA + [C 2 mim][EtSO 4 ] 系统中存在纳米级胶束。这项工作的结果表明，这种氟化表面活性剂在 [C 2 mim] [EtSO 4 ] 中表现出比传统烃类表面活性剂更显着的表面活性。图形摘要非质子离子液体中氟化表面活性剂的自组装 这项工作的结果表明，这种氟化表面活性剂在 [C 2 mim] [EtSO 4 ] 中表现出比传统烃类表面活性剂更显着的表面活性。图形摘要非质子离子液体中氟化表面活性剂的自组装 这项工作的结果表明，这种氟化表面活性剂在 [C 2 mim] [EtSO 4 ] 中表现出比传统烃类表面活性剂更显着的表面活性。图形摘要非质子离子液体中氟化表面活性剂的自组装