Volumetric and Viscosity Properties for the Binary Mixtures of 1- hexyle-3-methylimidazolium Tetrafluoroborate with methyl Acetates
Journal Title: International Journal of Humanities and Social Science Invention - Year 2018, Vol 7, Issue 7
Abstract
In this work, densities and viscosities for the binary mixtures of 1- hexyle - 3-methylimidazolium tetrafluoroborate, [C6mim][BF4], with methyl acetate, have been determined at 298.15 K. These data were used to calculate the excess molar volumes VE m and the viscosity deviations (lng) E for the mixtures. It is shown that values of VE m are negative, while those of (lng) E are positive in the whole concentration range. The VE m values show their minimum at the composition of xIL & 0.3, and the (lng) E values exhibit a maximum at the same mole fraction. For the binary systems, the absolute values of VE m decrease in the order: butanone[methyl acetate [ethyl acetate [propyl acetate[ butyl acetate, whereas those of (lng) E decrease in the order: methyl acetate [ethyl acetate [propyl acetate [butyl acetate [butanone. The results are discussed in terms of the ion– dipole interactions between cations of the ionic liquid and the organic molecules and hydrogen bonding interactions between anions of the ionic liquid and the organic compounds. Keywords Ionic liquid 1-Octyl-3- methylimidazolium tetrafluoroborate Density Viscosity Excess molar volume Viscosity deviation 1 I1 Introduction Ionic liquids (ILs) have been used as intriguing solvents in many fields of chemistry due to their strong solvating ability, very low volatility, wide liquid temperature range, wide electrochemical window and so forth [1, 2]. Although ILs have shown excellent performance in organic catalysis and synthesis [3–5], separation and extraction [6–8], material preparation [9–11] and electrochemical and energy fields [12–14], the fundamental physicochemical properties for both pure ILs and their mixtures with molecular solventsare still necessary. Among these properties, densities and viscosities are essential for the design of many technological processes, and information abstracted from these properties is also very useful for understanding solute–solvent and solute–solute interactions in the mixtures [15–19].
Authors and Affiliations
Ayya Samy
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