abstract
Experimental data for density, viscosity, refractive index and surface tension of four phosphonium-based ionic liquids were measured in the temperature range between (288.15 and 353.15) K and at atmospheric pressure. The ionic liquids considered include tri(isobutyl) methylphosphonium tosylate, [P-i(444) (1)][Tos], tri(butyl) methylphosphonium methylsulfate, [P-4441][CH3SO4], tri(butyl) ethylphosphonium diethylphosphate, [P-4442][(C2H5O)(2)PO2], and tetraoctylphosphonium bromide, [P-8888][Br]. Additionally, derivative properties, such as the isobaric thermal expansion coefficient, the surface thermodynamic properties and the critical temperatures for the investigated ionic liquids were also estimated and are presented and discussed. Group contribution methods were evaluated and fitted to the density, viscosity and refractive index experimental data. (C) 2015 Elsevier B.V. All rights reserved.
keywords
PRESSURE VOLUMETRIC PROPERTIES; TRANSPORT-PROPERTIES; SURFACE-TENSION; PHYSICOCHEMICAL PROPERTIES; REFRACTIVE-INDEX; CARBON-DIOXIDE; 1-BUTYL-3-METHYLIMIDAZOLIUM METHYLSULFATE; ELECTROCHEMICAL PROPERTIES; THERMODYNAMIC PROPERTIES; IMIDAZOLIUM
subject category
Thermodynamics; Chemistry; Engineering
authors
Bhattacharjee, A; Lopes-da-Silva, JA; Freire, MG; Coutinho, JAP; Carvalho, PJ
our authors
Arijit Bhattacharjee
Post-doc Fellowship
Mara Guadalupe Freire Martins
Coordinating Researcher
Pedro J. Carvalho
Assistant ProfessorGroups
G4 - Renewable Materials and Circular Economy
G5 - Biomimetic, Biological and Living Materials
Projects
Igy Technology: A Purication Platform using Ionic-Liquid-Based Aqueous Biphasic Systems (IGYPURTECH)
acknowledgements
This work was developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FT UID /CTM /50011/2013), financed by national funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. P.J.C. and A.B. also acknowledge FCT for their postdoctoral grants SFRH/BPD/82264/2011 and SFRH/BPD/77858/2011, respectively. M.G. Freire acknowledges the European Research Council (ERC) for the Starting Grant ERC-2013-StG-337753. The authors also acknowledge CYTEC Industries Inc. for kindly supplying the ionic liquids investigated in this work.