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Title
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Influence of water in the reaction of -aminopropyltriethoxysilane with silica gel : a Fourier-transform infrared and cross-polarisation magic-angle-spinning nuclear magnetic resonance study
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Author
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Abstract
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| 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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Language
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English
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Source (journal)
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Journal of the Chemical Society : Faraday transactions: physical chemistry and chemical physics / Bunsengesellschaft für Physikalische Chemie. - London, 1990 - 1998
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Publication
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London
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Royal Society of Chemistry
,
1992
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ISSN
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0956-5000
[print]
1364-5455
[online]
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DOI
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10.1039/FT9928803197
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Volume/pages
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88
:21
(1992)
, p. 3197-3200
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ISI
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A1992JX92300013
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Full text (Publisher's DOI)
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