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Zeitschriftenartikel:

N. Hüsing, C. Raab, V. Torma:
"Hierarchically Structured Silica Monoliths";
Mat. Res. Soc. Symp. Proc., 775 (2003), S. P1.7.1 - P1.7.6.



Kurzfassung englisch:
Large monoliths with periodic mesopores in a macroporous web-like network structure are prepared using a diol-modified silane as silica precursor and lyotropic liquid crystalline phases of surfactants in water as structure-directing agents. The surfactant concentration is varied from 5 to 40wt%. Highly porous materials are synthesized applying two different drying procedures:
supercritical drying with C02 or ethanol, in addition to ambient pressure drying including surfactant expulsion via silanisation treatments with trimethylchlorosilane or hexamethyl disilazane. The monolithic materials show a very unique macro- and mesostructure which is characterized by N2-sorption measurements, small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and scanning electron microscopy (SEM).


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