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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.
|Number of pages||9|
|Early online date||18 Dec 2008|
|Publication status||Published - 7 Apr 2009|
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- 1 Finished
NANOSTRUCTURED HYDROGEL FILMS FOR ENCAPSULATION AND RELEASE
Edler, K. & Price, G.
Engineering and Physical Sciences Research Council
11/07/07 → 10/01/11
Project: Research council