Title
Influence of water in the reaction of <tex>$\gamma$</tex>-aminopropyltriethoxysilane with silica gel : a Fourier-transform infrared and cross-polarisation magic-angle-spinning nuclear magnetic resonance study Influence of water in the reaction of <tex>$\gamma$</tex>-aminopropyltriethoxysilane with silica gel : a Fourier-transform infrared and cross-polarisation magic-angle-spinning nuclear magnetic resonance study
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
London ,
Subject
Physics
Chemistry
Source (journal)
Journal of the Chemical Society: Faraday transactions: physical chemistry and chemical physics / Chemical Society [London] - London
Volume/pages
88(1992) :21 , p. 3197-3200
ISSN
0956-5000
ISI
A1992JX92300013
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Silica gel has been modified with gamma-aminopropyltriethoxysilane under varying conditions, controlling the influence of water in the different modification stages, Diffuse reflectance infrared Fourier-transform (DRIFT) spectra revealed the influence of surface water in the reaction stage and of air humidity in the curing stage. These results were confirmed and refined by Si-29 and C-13 cross-polarisation magic-angle-spinning nuclear magnetic resonance (CPMASNMR) spectroscopy. Combining the results of both techniques, four modification structures present on the silica surface are proposed, depending on the conditions used.
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