Surface tensions of imidazolium based ionic liquids: Anion, cation, temperature and water effect

abstract

This work addresses the experimental measurements of the surface tension of eight imidazolium based ionic liquids (lLs) 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 lLs 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. (c) 2007 Elsevier Inc. All rights reserved.

keywords

PHYSICOCHEMICAL PROPERTIES; PHYSICAL-PROPERTIES; ALKYL CHAIN; THERMODYNAMIC PROPERTIES; HYDROGEN-BONDS; MIXTURES; INTERFACE; PRESSURE; EICOSANE; BINARY

subject category

Chemistry

authors

Freire, MG; Carvalho, PJ; Fernandes, AM; Marrucho, IM; Queimada, AJ; Coutinho, JAP

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".