Please use this identifier to cite or link to this item: doi:10.22028/D291-24596
Title: Aqueous sol-gel derived nanocomposite coating materials
Author(s): Schmidt, Helmut K.
Schirra, Hermann
Jonschker, Gerhard
Sepeur, Stefan
Arpac, Ertugrul
Language: English
Year of Publication: 1998
OPUS Source: Organic, inorganic hybrid materials : symposium held April 13-17, 1998, San Francisco, California, U.S.A. / eds: Richard M. Laine ... - Warrendale, PA : Materials Research Society, 1998. — (Materials Research Society symposia proceedings ; 519), S. 297-308
SWD key words: Sol-Gel-Verfahren
Lösungsmittel
Organisches Lösungsmittel
Wässriges Lösungsmittel
Hydrolyse
Kondensation
Ausgangsmaterial
DDC notations: 620 Engineering and machine engineering
Publikation type: Part of Conference Proceedings
Abstract: Sol-gel reactions, in general, have to take place in organic solvents in order to control the hydrolysis and condensation reaction. This leads to drawbacks in applications, since the organic solvent vapor concnetration has to be controlled for example in ocoating applications for environmental, health or security reasons. For this reason, a reaction route has been developed to produce coating precursors stable against water as solvent. To achieve this, conventional electrostatically stabilized sols obtained either by hydrolysis and condensation or commercially availabe sols (e.g. SiO2 sols) have been surface modified to reduce the particle-to-particle interaction and electrosterically stabilized precursors compatible to water have been obtained. By use of alkoxy silanes as surface modifiers, water-dispersable nanoparticulate liquid coating systems have been prepared, for example, with boehmite, SiO2 or TiO2 as nanoparticles to be crosslinked after coating thermally by inorganic condensation and organic condensation or polymerization reactions. Thus, aqueous sol-gel coating systems have been prepared with EtOH contents below 5%. In the paper, the basic reaction as well as material properties will be discussed.
Link to this record: urn:nbn:de:bsz:291-scidok-29059
hdl:20.500.11880/24652
http://dx.doi.org/10.22028/D291-24596
ISBN: 1-558-99425-4
Date of registration: 18-Jun-2010
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
Collections:INM
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