Please use this identifier to cite or link to this item: doi:10.22028/D291-24456
Title: A new type of a sol-gel-derived inorganic-organic nanocomposite
Author(s): Kasemann, Reiner
Schmidt, Helmut K.
Wintrich, Elisabeth
Language: English
Year of Publication: 1994
OPUS Source: Better ceramics through chemistry VI : symposium held April 4 - 8, 1994, San Francisco, California, USA / ed.: Anthony K. Cheetham … - Pittsburgh, Pa. : Materials Research Soc., 1994. — (Materials Research Society symposium proceedings ; 346), S. 915-921
SWD key words: Sol-Gel-Verfahren
DDC notations: 620 Engineering and machine engineering
Publikation type: Conference Paper
Abstract: A new type of sol-gel-based transparent inorganic-organic nano composites has been developed by increasing the inorganic phase dimension to values just below the point, where scattering can be neglected. For this purpose, nanosized boehmite particles ≤ 50 nm are homogeneously incorporated in a sol based on tetraethoxysilane and an epoxysilane. The nanoscale boehmite particles act as catalysts for the polymerization of the epoxy silane to polyethylene oxide, as proved by 13C NMR, and are linked to them matrix by Si-O-Al bridges, as proven by 27Al- NMR spectroscopy. The synthesized sols can be applied by standard coating techniques on transparent polymers and are cured thermally. The mechanical properties (scratch resistance, hardness) have been substantially improved compared to systems with molecular dimensions of the inorganic phase. The effect is attributed to the special structure of flexibly suspended nano-scale boehmite particles in an inroganic-organic network by a tailored interface.
Link to this record: urn:nbn:de:bsz:291-scidok-27679
ISBN: 1-558-99246-4
Date of registration: 12-Mar-2010
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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