Arnold T, Jackson A J, Sanchez-Fernandez A, Magnone D, Terry A E, Edler K J
Diamond Light Source, Harwell Campus, Didcot OX11 ODE, U.K.
European Spallation Source, Lund 221 00, Sweden.
Langmuir. 2015 Dec 1;31(47):12894-902. doi: 10.1021/acs.langmuir.5b02596. Epub 2015 Nov 17.
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.
深共熔溶剂（DES）类似于离子液体，但它是由离子混合物形成，而非单一的离子化合物。在此，我们展示了一些结果，这些结果表明表面活性剂十二烷基硫酸钠（SDS）在最常研究的DES——氯化胆碱/尿素中仍具有表面活性，并呈现出自组装现象。X射线反射率（XRR）和小角中子散射（SANS）表明，其行为与在水中的行为显著不同。我们的SANS数据支持了我们通过表面张力测量对临界胶束浓度的测定，并表明在DES中形成的胶束与在水中看到的胶束具有不同的形状和大小。反射率测量还表明，在该浓度以下，表面活性剂仍具有表面活性。
