Highly viscoelastic films at the water/air interface: α-Cyclodextrin with anionic surfactants
نویسندگان
چکیده
منابع مشابه
Nonionic and ionic surfactants at an interface
Abstract. A Ginzburg-Landau theory is presented on surfactants in polar binary mixtures, which aggregate at an interface due to the amphiphilic interaction. They can be ionic surfactants coexisting with counterions. Including the solvation and image interactions and accounting for a finite volume fraction of the surfactant, we obtain their distributions and the electric potential around an inte...
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Allan Twynam BP Sunbury, England For help in preparation of this article, thanks to Curtis Boney, Ernie Brown, Steve Davies and George Hawkins, Sugar Land, Texas, USA; Jorge Gonzalez and Arthur Milne, Caracas, Venezuela; Satyaki Ray, Calgary, Alberta, Canada; and David Schoderbek, Burlington Resources Canada, Calgary. ClearFRAC, ClearPAC, CoalFRAC, FMI (Fullbore Formation MicroImager), FracCADE...
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Cationic surfactantshaving long (C22)mono-unsaturated tailswerestudied inaqueoussolutionscontaining salt using steady and dynamic rheology. The surfactant erucyl bis(hydroxyethyl)methylammonium chloride self-assembles into giant wormlike micelles, giving rise to unusually strong viscoelasticity. Under ambient conditions, the viscosity enhancement due to surfactant exceeds a factor of 107. Some ...
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Equilibrium surface tension measurements have been carried out on mixed solutions of a nonsurface active polyelectrolyte (polyacrylamide sulfonate) and cationic surfactants. A strong synergistic lowering of the surface tension is found in the concentration range where no appreciable complexation of surfactant and polymer occurs in the bulk solution (as seen from viscosity measurements). The sur...
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Effects of binary mixtures of ionic/nonionic (sodium dodecyl sulfate/2-heptanol or 1-decanol) and nonionic/nonionic surfactants (2-heptnol/1-decanol) on drop/interface coalescence of water drops in a continuous n-heptane phase were examined. The drop size reduced appreciably and the multi-step coalescence was suppressed finally as the concentration of each of the constituting components</em...
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ژورنال
عنوان ژورنال: Journal of Colloid and Interface Science
سال: 2020
ISSN: 0021-9797
DOI: 10.1016/j.jcis.2019.12.012