Thermodynamic properties of binary mixtures of n-butylammonium-based ionic liquids with ethanol at T = (293.15–313.15) K

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 (N4Pr...

Full description

Saved in:
Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2019-02, Vol.135 (4), p.2519-2539
Main Authors: Bittencourt, Samara Storion, Hoga, Heloisa Emi, Torres, Ricardo Belchior, d’Angelo, José Vicente Hallak
Format: Article
Language:English
Subjects:
Activation energy
Analytical Chemistry
Binary mixtures
Chemistry
Chemistry and Materials Science
Composition
Compressibility
Deviation
Esters
Ethanol
Flow-density-speed relationships
Fourier transforms
Inorganic Chemistry
Ionic liquids
Ions
Measurement Science and Instrumentation
Molar volume
NMR
Nuclear magnetic resonance
Nuclear magnetic resonance spectroscopy
Physical Chemistry
Polymer Sciences
Polynomials
Solvents
Spectroscopy
Thermodynamic properties
Thermodynamics
Viscosity
Viscous flow
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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, V m E , deviation in isentropic compressibility, Δ κ S , deviation in viscosity, Δ η , and excess Gibbs energy of activation of viscous flow, Δ G ∗ E , were obtained from experimental results and correlated with the Redlich–Kister polynomial equation. Ionic liquids were synthesized and characterized using 1 H-NMR, 13 C-NMR and FTIR spectroscopy techniques. For all systems studied, the values of V m E , Δ κ S and Δ η were negative over the entire composition range, whereas Δ G ∗ 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.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-018-7399-0