abstract
Novel aqueous multiphase systems (MuPSs) formed by quaternary mixtures composed of cholinium-based ionic liquids (ILs), polymers, inorganic salts, and water are reported herein. The influence of several ILs, polymers, and salts was studied, demonstrating that a triple salting-out is a required phenomenon to prepare MuPSs. The respective phase diagrams and "tie-surfaces" were determined, followed by the evaluation of the effect of temperature. Finally, the remarkable ability of IL-based MuPSs to selectively separate mixtures of textile dyes is shown.
keywords
CARBON NANOTUBES; MOLECULAR BEARINGS; SOLID-STATE; DYNAMICS; THERMODYNAMICS; MODULATION; TRANSPORT; C-60
subject category
Chemistry
authors
Passos, H; Costa, SH; Fernandes, AM; Freire, MG; Rogers, RD; Coutinho, JAP
our authors
Helena Isabel Sousa Passos
Junior Researcher
Mara Guadalupe Freire Martins
Coordinating ResearcherGroups
G4 - Renewable Materials and Circular Economy
G5 - Biomimetic, Biological and Living Materials
Projects
CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)
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. FCT UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. The authors also acknowledge FCT for the doctoral grant SRH/BD/85248/2012 of H.P. M.G.F. acknowledges the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ ERC grant agreement no 337753. This research was undertaken, in part, thanks to funding from the Canada Excellence Research Chairs Program.