Abstract
Herein, mesostructured silica materials have been prepared through both the cooperative self-assembly and liquid crystal templating mechanisms by using mixtures of polyoxyethylene fluoroalkylether and cationic quaternary ammonium surfactants as building blocks. The nonionic surfactant/ionic surfactant/water phase diagram shows that a micellar phase (L1) was formed. The SAXS spectra of the two surfactants micellar phases are different from that of micelles constituted of only one component. This provides informations about the nature of the micelles, which are really mixed. A detailed investigation of the liquid crystals domain was also conducted, and results indicate the presence of a hexagonal mixed phase.Then, mesoporous silica materials with high specific surface area have been synthesized, using surfactant mixtures, and characterized by small angle X-ray scattering, transmission electron microscopy and nitrogen adsorption-desorption analysis. The SAXS patterns show two hexagonal porous networks, showing the presence of the dual porosity.
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