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Self-assembled films formed at the air-water interface from CTAB/SDS mixtures with water-soluble polymers


Reference:

Edler, K. J., Wasbrough, M. J., Holdaway, J. A. and O'Driscoll, B. M. D., 2009. Self-assembled films formed at the air-water interface from CTAB/SDS mixtures with water-soluble polymers. Langmuir, 25 (7), pp. 4047-4055.

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Official URL:

http:dx.doi.org/10.1021/la802854d

Abstract

We have investigated the spontaneous self-assembly of solid, mesostructured films that form at the air-solution interface on solutions containing a neutral water-soluble polymer and catanionic surfactant mixtures of hexadecyltrimethylammonium bromide (CTAB) and sodium dodecylsulphate (SDS). The formation processes and structures were probed using neutron reflectivity, X-ray reflectivity, off-specular time-resolved scattering, and grazing incidence diffraction. The mesostructures of films prepared with polyethylene oxide, polyethylenimine, and polyacrylamide at various cationic/anionic surfactant molar ratios are compared. The results suggest that polymers having a weak interaction with the surfactants cause a depletion aggregation process that results in a lamellar phase, whereas polymers having a stronger interaction with the surfactants produce more complex mesostructures in the films.

Details

Item Type Articles
CreatorsEdler, K. J., Wasbrough, M. J., Holdaway, J. A. and O'Driscoll, B. M. D.
DOI10.1021/la802854d
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code14158

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