Theoretical model for moisture adsorption on ionic liquids: A modified Brunauer-Emmet-Teller isotherm approach

被引：14

作者：

Carrete, J. ^{[1
]}

Garcia, M. ^{[1
]}

Rodriguez, J. R. ^{[1
]}

Cabeza, O. ^{[2
]}

Varela, L. M. ^{[1
]}

机构：

[1] Univ Santiago de Compostela, Grp Nanomat & Mat Blanda, Dept Fis Mat Condensada, E-15782 Santiago De Compostela, Spain

[2] Univ A Coruna, Fac Ciencias, E-15008 La Coruna, Spain

来源：

FLUID PHASE EQUILIBRIA | 2011年 / 301卷 / 01期

关键词：

Ionic liquids; Pseudolattice theory; Adsorption isotherm; Brunauer-Emmet-Teller; Lateral interactions; Hygroscopic; Hydrophobic adsorption; Hydrophilic adsorption; PSEUDOLATTICE THEORY; ELECTROLYTES; COEFFICIENTS; INTERFACES; ADSORBATES; BINDING;

D O I：

10.1016/j.fluid.2010.11.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The adsorption of atmospheric water on the air-liquid interface of ionic liquids is analyzed by means of a modified version of the Brunauer-Emmet-Teller (BET) multilayer adsorption isotherm including lateral interactions between adsorbed molecules, treated in a mean-field fashion. Recently reported experimental results of water adsorption on hydrophobic ionic liquids of the 1-alkyl-3-methyl imidazolium tetrafluoroborate (C-n MIM-BF4) family are analyzed in the present theoretical framework. The calculated values of the lateral interaction are seen to be compatible with the Keesom dipole-dipole interaction in water, confirming the validity of the multilayer assumption hypothesis. A somehow surprisingly ordered hydrophilic-like adsorption of atmospheric water is suggested to take place in the free surface of hydrophobic Its of the imidazolium family. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：118 / 122

页数：5

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