Inorganic-Organic Hybrid Hierarchically Structured Methyl-modified Silica Monoliths

MRS Online Proceedings Library volume 847, pages320–327(2004)Cite this article

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.

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Acknowledgments

We thank E. Eitenberger and Prof. Dr. G. Friedbacher for the SEM images.

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Affiliations

  1. Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/ 165, A-1060, Vienna, Austria

    Doris Brandhuber & Nicola Hüsing

  2. Institute of Materials Physics, University of Vienna, Boltzmanngasse 5, A-1090, Vienna, Austria

    Herwig Peterlik

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  1. Doris Brandhuber
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  2. Nicola Hüsing
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  3. Herwig Peterlik
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Correspondence to Doris Brandhuber.

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Brandhuber, D., Hüsing, N. & Peterlik, H. Inorganic-Organic Hybrid Hierarchically Structured Methyl-modified Silica Monoliths. MRS Online Proceedings Library 847, 320–327 (2004). https://doi.org/10.1557/PROC-847-EE3.1

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