Gel formation during sol–gel synthesis of silicon dioxide

The effects of water and catalyst (formic acid) concentrations and temperature on tetraethoxysilane hydrolysis, followed by gel formation, have been studied. The catalyst concentration is found to have a stronger effect on the variation rate of dynamic viscosity of the system compared to the effect...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2015-12, Vol.60 (12), p.1444-1451
Main Authors: Simonenko, E. P., Derbenev, A. V., Simonenko, N. P., Sevastyanov, V. G., Kuznetsov, N. T.
Format: Article
Language:English
Subjects:
Air flow
Catalysts
Chemistry
Chemistry and Materials Science
Dynamical systems
Dynamics
Formations
Hydrolysis
Inorganic Chemistry
Sol gel process
Synthesis and Properties of Inorganic Compounds
Thermal properties
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Summary:The effects of water and catalyst (formic acid) concentrations and temperature on tetraethoxysilane hydrolysis, followed by gel formation, have been studied. The catalyst concentration is found to have a stronger effect on the variation rate of dynamic viscosity of the system compared to the effect of water concentration. The thermal behavior of the thus-prepared xerogels has been studied in an air flow; distinctions have been noticed for samples whose initial dispersion-bound systems were formed at room temperature.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023615120220