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Inorganic-Organic Hybrid Hierarchically Structured Methyl-modified Silica Monoliths

Published online by Cambridge University Press:  01 February 2011

Doris Brandhuber ,
Nicola Hüsing  and
Herwig Peterlik
Doris Brandhuber
Affiliation:
Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/ 165, A-1060. Vienna, Austria
Nicola Hüsing
Affiliation:
Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/ 165, A-1060. Vienna, Austria
Herwig Peterlik
Affiliation:
Institute of Materials Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
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Abstract

Highly porous inorganic-organic hybrid monoliths with mesopores in a macroporous network have been prepared from methyltris(2-hydroxyethoxy)silane (MeGMS) and tetrakis(2-hydroxyethoxy)silane (EGMS) in the presence of an amphiphilic block copolymer. The amount of methyltris(2-hydroxyethoxy)silane (MeGMS) in the gel has been varied from 0 to 100 %. These glycol-modified silanes have the advantage of being water-soluble and thus allowing for a direct templating of liquid-crystalline surfactant mesophases without the presence of a homogenizing organic solvent such as ethanol. The wet gels have been dried by supercritical extraction with carbon dioxide.

In the present work, the sol-gel behaviour of these glycol-modified silanes is discussed especially with a focus on the formation of the meso- and macrostructure. In addition, the influences of the varying ratios of methyltris(2-hydroxyethoxy)silane on the structural features of the gels are investigated by various analytical techniques such as small angle X-ray scattering, nitrogen sorption, and scanning electron microscopy.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 847: Symposium EE – Organic/Inorganic Hybrid Materials , 2004 , EE3.1
Copyright
Copyright © Materials Research Society 2005

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References

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