Water-based sodium borosilicate sols and their gelation-characterisation by viscosimetry, UV/VIS- and infrared spectroscopy

Sodium silicate solutions were mixed with boric acid in order to form sodium borosilicate gels. The gelation process was observed by dynamic oscillatory experiments. The effects of composition and temperature on the gel point are discussed. Furthermore, an indicator of the gel point for the water-ba...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2002-12, Vol.25 (3), p.191-200
Main Authors: BÖSCHEL, Dorit, ROGGENDORF, Hans
Format: Article
Language:English
Subjects:
Borosilicate
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Composition effects
Exact sciences and technology
Gelation
Gels
General and physical chemistry
Infrared spectroscopy
Optical microscopy
Sodium
Sodium silicates
Spectrum analysis
Turbidity
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Summary:Sodium silicate solutions were mixed with boric acid in order to form sodium borosilicate gels. The gelation process was observed by dynamic oscillatory experiments. The effects of composition and temperature on the gel point are discussed. Furthermore, an indicator of the gel point for the water-based sodium borosilicate gels was found. The turbidity was investigated by UV/VIS spectroscopy and optical microscopy. Infrared spectroscopic measurements were applied to characterise the gelation process, too.
ISSN:0928-0707
1573-4846
DOI:10.1023/A:1020283206199