Institute for Applied Materials, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany.
Department of Microsystems Engineering, University of Freiburg, Georges-Köhler-Allee 102, D-79110 Freiburg, Germany.
Molecules. 2019 Jan 17;24(2):324. doi: 10.3390/molecules24020324.
Eight new polymerizable ammonium-TFSI ionic liquids were synthesized and characterized with respect to an application in energy storage devices. The ionic liquids feature methacrylate or acrylate termination as polymerizable groups. The preparation was optimized to obtain the precursors and ionic liquids in high yield. All products were characterized by NMR and IR spectroscopy. Phase transition temperatures were obtained by DSC analysis. Density, viscosity and ionic conductivity of the ionic liquids were compared and discussed. The results reveal that the length of attached alkyl groups as well as the methyl group at the polymerizable function have significant influences on the ionic liquids physicochemical properties. Ionic conductivity values vary between 0.264 mS cm for [C₂N]TFSI and 0.080 mS cm for [C₈N]TFSI at 25 °C. Viscosity values are within a range of 0.762 Pa s for [C₂N]TFSI and 1.522 Pa s for [C₆N]TFSI at 25 °C.
合成了八种新型可聚合的铵-TFSI 离子液体，并对其在储能装置中的应用进行了研究。这些离子液体具有甲基丙烯酸酯或丙烯酸酯端基作为可聚合基团。优化了制备方法，以获得高收率的前体和离子液体。所有产物均通过 NMR 和 IR 光谱进行了表征。通过 DSC 分析获得了相转变温度。比较和讨论了离子液体的密度、粘度和离子电导率。结果表明，连接的烷基链的长度以及可聚合官能团上的甲基对离子液体的物理化学性质有显著影响。在 25°C 时，离子电导率值在 [C₂N]TFSI 的 0.264 mS cm 和 [C₈N]TFSI 的 0.080 mS cm 之间变化。在 25°C 时，粘度值在 [C₂N]TFSI 的 0.762 Pa s 和 [C₆N]TFSI 的 1.522 Pa s 之间变化。
