Anionic surfactant induced desorption of a cationic surfactant from mica.
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Abstract
The adsorption and desorption of a cationic surfactant, didodecyldimethy- lammonium bromide, from water onto a mica surface has been investigated using neutron reflectivity. The surfactant was observed to adsorb strongly as a bilayer that was tenacious to a sustained water wash, but on the addition of an anionic surfactant, sodium dodecyl sulfate, at its critical micelle concentration complete desorption was observed.
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Neutron reflectivity, Mica, Didodecyldimethylammonium bromide, Sodium dodecyl sulfate, Surfactant, Catanionic
Journal Title
Applied Clay Science
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0169-1317
1872-9053
1872-9053
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Elsevier
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Engineering and Physical Sciences Research Council (1799423)
We thank BP PLC for funding (RG8620), and specifically Stephanie Houston and Isabella Stocker for their input. We also thank ISIS (RB 1710119, DOI:10.5286/ISIS.E.86389514) and the beamtime committee for the allocation of beamtime, as well as the beamline scientists for their invaluable support.