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Titel: Evolution of the viscosity of mixed organically modified silane sols for the preparation of organic-inorganic monolithic glass
Verfasser: Schmidt, Helmut K.
Hoffmann, Bernd
Mennig, Martin
Hou, Lisong
Sprache: Englisch
Erscheinungsjahr: 1995
Quelle: Proceedings of XVII International Congress on Glass : [Beijing, China, Oct. 9 - 14, 1995] / [organized by:] Chinese Ceramic Society. [Sponsored by: International Commission on Glass. Chief ed.: Gong Fangtian]. — Vol. 4. - Beijing : International Academic Publishers, 1995, S. 337-342
SWD-Schlagwörter: Viskosität
Silane
Organisch-anorganischer Hybridwerkstoff
Sol-Gel-Verfahren
DDC-Sachgruppe: 620 Ingenieurwissenschaften und Maschinenbau
Dokumentart : InProceedings (Aufsatz / Paper einer Konferenz etc.)
Kurzfassung: Organically modified silanes (OMSs) are widely used as starting compounds for the synthesis of organic-inorganic hybrid materials in different shapes by sol-gel processing. The viscosity behaviour of the sols plays an important role in the structures and properties of the final products. In the present work, we report on the effect of composition, starting compounds and additives on the viscosity evolution of mixed organically modified silane sols and thereby on the feasability of formation of organic-inorganic glass monoliths from these sols. The experimental results demonstrate that the viscosity increase of the CH3-Si(OCH3)3-CH2(O)CHO(CH2)3Si(OCH3)3 (MG) sols is much faster than the C3H3-Si(OCH3)3-CH2(O)CHO(CH2)3Si(OCH3)3 (PG) sols and the base additives are far more effective th the MG sols than to the PG sols. The viscosity-determining silane is CH3-Si(OCH3)3 (MTMS) in the MG system whereas it is CH2(O)CH=(CH2)3Si(OCH3)3 (GPTMS) in the PG system. The possibility of forming monolithic gels by a perforation method is closely related to the viscosity behaviour of the sols. Utilization of C2H5-Si(OCH3)3 (ETMS) in replacement of M or P leads to a moderate gelling time and better capability of foring glass monoliths.
Link zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-28037
hdl:20.500.11880/24549
http://dx.doi.org/10.22028/D291-24493
ISBN der Druckausgabe: 7-8000-3343-0
SciDok-Publikation: 23-Mär-2010
Fakultät: Sonstige Einrichtungen
Fachrichtung: SE - INM Leibniz-Institut für Neue Materialien
Fakultät / Institution:INM
INM
SE - Sonstige Einrichtungen

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