Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/109123
Type: Artigo de periódico
Title: Thermophysical Properties Of Binary Mixtures Of {ionic Liquid 2-hydroxy Ethylammonium Acetate + (water, Methanol, Or Ethanol)}
Author: Alvarez V.H.
Mattedi S.
Martin-Pastor M.
Aznar M.
Iglesias M.
Abstract: In this work, density and speed of sound data of binary mixtures of an ionic liquid consisting of {2-hydroxy ethylammonium acetate (2-HEAA) + (water, methanol, or ethanol)} have been measured throughout the entire concentration range, from the temperature of (288.15 to 323.15) K at atmospheric pressure. The excess molar volumes, variations of the isentropic compressibility, the apparent molar volume, isentropic apparent molar compressibility, and thermal expansion coefficient were calculated from the experimental data. The excess molar volumes were negative throughout the whole composition range. Compressibility data in combination with low angle X-ray scattering and NMR measurements proved that the presence of micelles formed due to ion pair interaction above a critical concentration of the ionic liquid in the mixtures. The Peng-Robinson equation of state coupled with the Wong-Sandler mixing rule and COSMO-SAC model was used to predict densities and the calculated deviations were lower than 3%, for binary mixtures in all composition range. © 2011 Elsevier Ltd. All rights reserved.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/j.jct.2011.01.014
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-79954419566&partnerID=40&md5=7ba9dcf5111a3600ef644b4a45d9c6d7
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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