Effect of Temperature and Composition on the Density and Viscosity of Binary Mixtures of Ionic Liquid with Alcohols

• Published in: Journal of solution chemistry Vol. 38; no. 6; pp. 779 - 799
• Main Authors: Domańska, Urszula, Laskowska, Marta
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.06.2009; Springer
• Subjects: Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Exact sciences and technology; General and physical chemistry; Geochemistry; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Oceanography; Physical Chemistry; Solutions; Correlation; Experimental densities and viscosities; Excess molar volumes; Molecular interactions; [BMIM][SCN]; Viscosity; Molar volume; Alcohol; Molecular; Density; Ionic interaction; 1-Pentanol; Ionic liquid; interactions; Packing; Alkanol; Thiocyanates; Qualitative analysis; Expansion; Composition; Chain length; Equation; Carbon; Pressure; Binary mixture; BMIMI[SCN]; Butanol; Thermodynamic properties; Rheological properties
• ISSN: 0095-9782; 1572-8927
• DOI: 10.1007/s10953-009-9410-7

Density and viscosity were determined for the binary mixtures containing the ionic liquid 1-butyl-3-methylimidazolium thiocyanate ([BMIM][SCN]) and 1-alcohols (1-butanol, 1-pentanol and 1-hexanol) at six temperatures (298.15, 308.15, 318.15, 328.15, 338.15 and 348.15) K and ambient pressure. The density and viscosity correlation for these systems was tested by an empirical second-order polynomial and by the Vogel-Fucher-Tammann equation in wide ranges of temperatures. Excess molar volumes were described by the Redlich-Kister polynomial expansions. The density and viscosity variations with composition were described by polynomials. A qualitative analysis of the trend of the properties with solvent and temperature was performed. The obtained results indicate that ionic liquid interactions with 1-alcohols are strongly dependent on the special trend of packing of this ionic liquid into hydroxylic solvents. As previously observed, an increase of the 1-alcohol carbon-chain length leads to lower interactions on mixing.