title: Surfactant Behavior of Sodium Dodecylsulfate in Deep Eutectic Solvent Choline Chloride/Urea.
abstract: Deep eutectic solvents (DES) resemble ionic liquids but are formed from an ionic mixture instead of being a single ionic compound. Here we present some results that demonstrate that surfactant sodium dodecyl sulfate (SDS) remains surface-active and shows self-assembly phenomena in the most commonly studied DES, choline chloride/urea. X-ray reflectivity (XRR) and small angle neutron scattering (SANS) suggest that the behavior is significantly different from that in water. Our SANS data supports our determination of the critical micelle concentration using surface-tension measurements and suggests that the micelles formed in DES do not have the same shape and size as those seen in water. Reflectivity measurements have also demonstrated that the surfactants remain surface-active below this concentration.
authors.affiliation: Diamond Light Source, Harwell Campus, Didcot OX11 ODE, U.K.
authors.forename: T
authors.initials: T
authors.lastname: Arnold
authors.affiliation: European Spallation Source, Lund 221 00, Sweden.|Department of Physical Chemistry, Lund University , SE-221 00 Lund, Sweden.
authors.forename: A J
authors.initials: AJ
authors.lastname: Jackson
authors.affiliation: European Spallation Source, Lund 221 00, Sweden.|Department of Chemistry, University of Bath , Claverton Down, Bath BA2 7AY, U.K.
authors.forename: A
authors.initials: A
authors.lastname: Sanchez-Fernandez
authors.affiliation: Diamond Light Source, Harwell Campus, Didcot OX11 ODE, U.K.
authors.forename: D
authors.initials: D
authors.lastname: Magnone
authors.affiliation: ISIS Spallation Neutron Source, Harwell Campus, Didcot OX11 ODE, U.K.
authors.forename: A E
authors.initials: AE
authors.lastname: Terry
authors.affiliation: Department of Chemistry, University of Bath , Claverton Down, Bath BA2 7AY, U.K.
authors.forename: K J
authors.initials: KJ
authors.lastname: Edler