Abstract
The adsorption and desorption of a cationic surfactant, didodecyldimethylammonium bromide, from water onto a mica surface have 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.
Original language | English |
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Pages (from-to) | 276-281 |
Number of pages | 6 |
Journal | Applied Clay Science |
Volume | 160 |
DOIs | |
State | Published - Aug 2018 |
Externally published | Yes |
Funding
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.
Keywords
- Catanionic
- Didodecyldimethylammonium bromide
- Mica
- Neutron reflectivity
- Sodium dodecyl sulfate
- Surfactant