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Type: Artigo
Title: Thermodynamic properties of binary mixtures of n-butylammonium-based ionic liquids with ethanol at T = (293.15–313.15) K
Author: Bittencourt, Samara Storion
Hoga, Heloisa Emi
Torres, Ricardo Belchior
d’Angelo, José Vicente Hallak
Abstract: In this study, density, speed of sound and viscosity of binary mixtures of ionic liquids + ethanol have been measured as a function of composition at T = (293.15–313.15) K and atmospheric pressure. The ionic liquids studied were: {n-butylammonium acetate (N4Ace), n-butylammonium propanoate (N4Pro), n-butylammonium hexanoate (N4Hex), and n-butylammonium decanoate (N4Dec)}. Excess molar volume, VEm, deviation in isentropic compressibility, ΔκS, deviation in viscosity, Δη, and excess Gibbs energy of activation of viscous flow, ΔG∗E, were obtained from experimental results and correlated with the Redlich–Kister polynomial equation. Ionic liquids were synthesized and characterized using 1H-NMR, 13C-NMR and FTIR spectroscopy techniques. For all systems studied, the values of VEm, ΔκS and Δη were negative over the entire composition range, whereas ΔG∗E values were positive over the entire composition range. The results obtained were discussed in terms of structural effects and intermolecular interactions between like and unlike molecules
Subject: Etanol
Country: Hungria
Editor: Springer
Rights: Fechado
Identifier DOI: 10.1007/s10973-018-7399-0
Date Issue: 2019
Appears in Collections:FEQ - Artigos e Outros Documentos

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