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Surfactant Behavior of Sodium Dodecylsulfate in Deep Eutectic Solvent Choline Chloride/Urea

DOI: 10.1021/acs.langmuir.5b02596 DOI Help
PMID: 26540438 PMID Help

Authors: T Arnold (Diamond Light Source) , A Jackson (European Spallation Source ESS AB) , A. Sanchez-fernandez (European Spallation Source) , D. Magnone (Diamond Light Source) , A. E. Terry (ISIS Spallation Neutron Source) , K. J. Edler (University of Bath)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Langmuir , VOL 31 (47)

State: Published (Approved)
Published: November 2015
Diamond Proposal Number(s): 9748

Open Access Open Access

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.

Subject Areas: Chemistry, Materials

Instruments: I07-Surface & interface diffraction

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