Estimation of Surface Tension of Ionic Liquid鈥揅osolvent Binary Mixtures by a Modified Hildebrand鈥揝cott Equation

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• 作者：Yingjie Xu ; Hongye Zhu ; Lulu Yang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2013
• 出版时间：August 8, 2013
• 年：2013
• 卷：58
• 期：8
• 页码：2260-2266
• 全文大小：282K
• 年卷期：v.58,no.8(August 8, 2013)
• ISSN：1520-5134

文摘

The correlation model of gas鈥搇iquid interfacial tension (surface tension) of nonaqueous mixtures containing ionic liquids (ILs) is still in its infancy. The purpose of this work is to develop a modified Hildebrand鈥揝cott equation based on local composition concept and the group surface area parameters of UNIFAC model as well as to evaluate the capability of this model. The surface tension of 33 IL鈥揷osolvent binary systems were correlated by the modified Hildebrand鈥揝cott equation with two energy parameters and an overall average relative deviation of only 0.92%. The ILs in the study included imidazolium-based, pyridinium-based, and isoquinolinium-based ones, and the cosolvents included methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol, acetonitrile, and tetrahydrofuran. Using the energy parameters obtained from the surface tension of a given IL鈥揷osolvent binary system at 298.15 K, the surface tension of the same system at other different temperatures was predicted by the modified Hildebrand鈥揝cott equation, with an overall average relative deviation of 1.06%.