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Phase equilibria and surfactant behavior of fluorinated ionic liquids with water
Affiliation:1. State Laboratory, Backweston Laboratory Campus, Celbridge, Co. Kildare, Ireland;2. Medical Bureau of Road Safety, Health Science Centre, University College Dublin, Belfield, D. 4, Ireland;1. Chimie Analytique des Molécules Bioactives, Institut Pluridisciplinaire Hubert Curien (UMR 7178 CNRS/UDS), 74 route du Rhin, 67400 Illkirch, France;2. UMR DIATHEC, EA 7294, Centre Européen d’Etude du Diabète, Université de Strasbourg, Boulevard René Leriche, 67200 Strasbourg, France;3. Institut Malgache de Recherches Appliquées, Fondation Albert et Suzanne RAKOTO-RATSIMAMANGA, Lot AVB 76 Avarabohitra Itaosy 102 Antananarivo, Madagascar;1. Division of Residue Chemistry, Food and Drug Administration, Center for Veterinary Medicine, Office of Research, 8401 Muirkirk Road, Laurel, MD 20708, USA;2. Veterinary Laboratory Investigation & Response Network, Food and Drug Administration, Center for Veterinary Medicine, Office of Research, 8401 Muirkirk Road, Laurel, MD 20708, USA;1. Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran;2. Department of Applied Chemistry, Faculty of Science, Malayer University, Malayer, 65174, Iran;1. Department of Aerosols Chemistry and Physics, Institute of Chemical Process Fundamentals CAS, v. v. i., Rozvojová 135/1, 165 02, Prague 6, Czech Republic;2. Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals CAS, v. v. i., Rozvojová 135/1, 165 02, Prague 6, Czech Republic;3. Department of Analytical Chemistry, Institute of Chemical Process Fundamentals CAS, v. v. i., Rozvojová 135/1, 165 02, Prague 6, Czech Republic;4. Department of Laser Chemistry, Institute of Chemical Process Fundamentals CAS, v. v. i., Rozvojová 135/1, 165 02, Prague 6, Czech Republic
Abstract:This work studies the phase equilibria and surfactant behavior of fluorinated ionic liquids (FILs) containing fluorinated chains equal to four carbons with water. The knowledge about the phase behavior is crucial for the applications of these novel FILs with tuneable properties. The phase equilibria of the binary mixtures FILs with water were studied at atmospheric pressure in a temperature range from (298.15 to 353.15) K. In this study, FILs containing ammonium, pyrrolidinium and imidazolium cations and the perfluorobutanesulfonate anion were included. The Non-Random Two Liquid (NRTL) thermodynamic model was successfully applied to rationalize the phase behavior of the binary (water + FILs) mixtures. Furthermore, the critical micelle concentrations (CMCs) of these FILs, which present cations and/or anions with surfactant properties were also performed at T = 298.15 K by measurements of the ionic conductivity. Finally, the Dynamic Light Scattering (DLS) was used with aim to determinate the size of the aggregates of these FILs in water.
Keywords:Fluorinated ionic liquids  Phase equilibria  Critical micelle concentrations  Dynamic Light Scattering  Thermodynamic functions
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