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Influence of Structure of Ionic Liquids on the Properties of their Mixtures with Water
Rotrekl, Jan
This contribution reports on a part of the results of a project focused on imidazolium-based ILs with a bis{(trifluoromethyl)sulfonyl}imide anion. The choice of the studied ILs is motivated by a study of the influence of the cation structure on the physico-chemical properties of pure ionic liquids and their mixtures with molecular solvents. For this purpose, four isomeric ILs, namely 1-alkyl-3-butylimidazolium bis{(trifluoromethyl) sulfonyl}imides (abbreviated [C4xC5im][Tf2N], alkyl = pentyl, isopentyl, 3-pentyl, or cyclopentyl) were selected. In a previous work, fundamental physico-chemical properties such as density, isobaric heat capacity, viscosity, electrical conductivity were measured.2 In this part of the study, the properties of the studied range of ILs in systems with water were investigated.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22015061709371 - PDF
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Organic Vapour Sorption and Permeation in Polymer Gel Membrane Containing Imidazolium Based Ionic Liquid
Morávková, Lenka ; Vopička, O. ; Vejražka, Jiří ; Vychodilová, Hana ; Sedláková, Zuzana ; Friess, K. ; Izák, Pavel
In this work, vapour sorption and transport properties were studied for the aliphatic hydrocarbon (hexane), branched hydrocarbon (isooctane), and alcohol (ethanol) using a gravimetric sorption apparatus and a home-made laboratory-scale apparatus, respectively. The ionic liquid polymer gel membrane based on poly(vinylidene fluoride-cohexafluoropropylene) (abbreviated p(VDF-HFP)) was prepared by solvent casting from a solution in acetone. The used membrane contains 80 wt. % of the imidazolium basedionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf2N]).
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22014090110397 - PDF
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Sorption Characteristics of PDMS in Ternary Systems Benzene (1) + Alcohols (2) + Ionic Liquid (3) and Corresponding Binary Subsystems
Randová, A. ; Bartovská, L. ; Hovorka, Š. ; Friess, K. ; Izák, Pavel
In this work the study of sorption characteristics of PDMS in ternary system benzene (1) + methanol or butanol (2) + ionic liquid (3) and corresponding binary subsystems at the temperature of 20°C is presented. The experimental data on total sorption were determined gravimetrically [3], the experimental data on preferential sorption were evaluated from the concentration change induced by an immersion of the membrane into the liquid mixture [3]. The volume changes of swollen membrane immersed in the studied liquid systems were determined from the dimensional changes of the membrane samples changes in X and Y axis dimensions were monitored directly in liquid by an optical method [1, 3] and membrane sheet thickness was measured by an Inductive Dial Indicator (Mahr, Germany).
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Rozpustnost 1-ethyl-3-methylimidazolium ethylsulfátu v superkritickém CO2
Bendová, Magdalena ; Sedláková, Zuzana ; Wagner, Zdeněk
In this contribution was studied by the synthetic method. A Thar Technologies Supercritical Phase Monitor was used to carry out the measurements. To check the accuracy of the synthetic apparatus, phase behavior of the binary mixture MTBE plus CO2 was measured both by means of the synthetic method and using a high-pressure phase equilibrium apparatus built in our laboratory. The acquired data were subsequently modeled by a cubic SRK-based equation of state proposed by Yokozeki and Shiflett.
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Thermophysical properties of ionic liquids and binary mixtures containing them – An overview
Součková, Monika ; Pátek, Jaroslav ; Klomfar, Jaroslav
The report provides a comprehensive review of literature sources of experimental data on the thermophysical properties of ionic liquids, a novel class of materials with a wide range of applications. The literature search was focused on pure ionic liquids as well as on the binary mixtures containing them. The following thermophysical properties have been included into the study: density, isobaric heat capacity, speed of sound, surface tension, vapor-liquid equilibrium pressures, solid-liquid phase transition temperatures, viscosity, electrical conductivity, refractive index, activity coefficients, and decomposition temperatures. The results of the search are presented in the form of synoptic tables. The reference list of bibliography contains 97 items.
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