ARTICLE pubs.acs.org/Langmuir
Solution Self-Assembly of the Sophorolipid Biosurfactant and Its Mixture with Anionic Surfactant Sodium Dodecyl Benzene Sulfonate Jeff Penfold,*,†,‡ Minglei Chen,† Robert K. Thomas,† Chuchuan Dong,† Thomas J. P. Smyth,§ Amedea Perfumo,§ Roger Marchant,§ Ibrahim M. Banat,§ Paul Stevenson,|| Alyn Parry,|| Ian Tucker,|| and I. Grillo^ †
Physical and Theoretical Chemistry Department, University of Oxford, South Parks Road, Oxford, U.K. ISIS, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, U.K. § School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland Unilever Research and Development Laboratory, Port Sunlight, Wirral, U.K. ^ Institut Laue Langevin, 6 rue Jules Horowitz, F-38042, Grenoble, Cedex 09, France
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bS Supporting Information ABSTRACT: The self-assembly in aqueous solution of the acidic (AS) and lactonic (LS) forms of the sophorolipid biosurfactant, their mixtures, and their mixtures with anionic surfactant sodium dodecyl benzene sulfonate, LAS, has been studied using predominantly small-angle neutron scattering, SANS, at relatively low surfactant concentrations of
