(377m) Volumetric, Acoustic and Viscometric Properties of Binary Mixture of (n-butylammonium methanoate + 1-butanol) at Different Temperatures
The binary mixtures were prepared by weighing the pure components using an electronic balance manufactured by Shimadzu (Model AUY220). The densities and speed of sound of pure components and their solutions were measured using a commercial density and speed of sound analyzer manufactured by Anton Paar (DSA 5000). The viscosities were measuring using a Stabinger viscometer manufactured by Anton Paar (SVM 3000/G2). The analysis of 1H-NMR and 13C-NMR were obtained in an Avance III 600 HD Bruker spectrometer operating at 600 MHz for protons and 150 MHz for carbon. The IR spectra were obtained in Fourier transform infrared spectroscopy Nicolet with attenuated total reflectance (FTIR-ATR) (Model 6700).
For all systems studied, the values of excess molar volumes, deviation in isentropic compressibility and deviation in viscosity were negative over the entire composition range. The values of excess Gibbs energy of activation for viscous flow were positive over the entire composition range. The results obtained were discussed in terms of intermolecular interactions, particularly hydrogen-bonding interactions between like and unlike molecules.
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 Neto, J. C. A.; Cabral, A. S.; Oliveira; L. R. D.; Torres, R. B. Morandim-Giannetti, A. A., Synthesis and characterization of new low-cost ILs based on butylammonium cation and application to lignocellulose hydrolysis, Carbohydrate Polymers, v. 143, p. 279-287, 2016.