基于咪唑鎓的离子液体的表面张力：阴离子、阳离子、温度及水的影响。
Surface tensions of imidazolium based ionic liquids: anion, cation, temperature and water effect.
作者信息
Freire Mara G, Carvalho Pedro J, Fernandes Ana M, Marrucho Isabel M, Queimada António J, Coutinho João A P
机构信息
CICECO, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
出版信息
J Colloid Interface Sci. 2007 Oct 15;314(2):621-30. doi: 10.1016/j.jcis.2007.06.003. Epub 2007 Jun 8.
This work addresses the experimental measurements of the surface tension of eight imidazolium based ionic liquids (ILs) and their dependence with the temperature (288-353 K) and water content. The set of selected ionic liquids was chosen to provide a comprehensive study of the influence of the cation alkyl chain length, the number of cation substitutions and the anion on the properties under study. The influence of water content in the surface tension was studied for several ILs as a function of the temperature as well as a function of water mole fraction, for the most hydrophobic IL investigated, [omim][PF(6)], and one of the more hygroscopic IL, [bmim][PF(6)]. The surface thermodynamic functions such as surface entropy and enthalpy were derived from the temperature dependence of the surface tension values.
这项工作涉及对八种咪唑基离子液体（ILs）表面张力的实验测量，以及它们与温度（288 - 353 K）和含水量的关系。所选的离子液体集合旨在全面研究阳离子烷基链长度、阳离子取代数和阴离子对所研究性质的影响。针对几种离子液体，研究了含水量对表面张力的影响，作为温度的函数以及水摩尔分数的函数，其中包括疏水性最强的离子液体[omim][PF(6)]和吸湿性较强的离子液体之一[bmim][PF(6)]。表面热力学函数，如表面熵和焓，是从表面张力值的温度依赖性推导出来的。
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