Title
Modeling of the reaction-phase interaction of <tex>$\gamma$</tex>-aminopropyltriethoxysilane with silica
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
London ,
Subject
Physics
Chemistry
Source (journal)
Journal of the Chemical Society: Faraday transactions
Journal of the Chemical Society: Faraday transactions: physical chemistry and chemical physics / Chemical Society [Londen] - London
Volume/pages
89(1993) :12 , p. 2037-2040
ISSN
0956-5000
ISI
A1993LJ59800023
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The coating formed in the reaction phase of the modification of silica with gamma-aminopropyltriethoxysilane was modelled using the freeze sampling method with a classical N-determination. The formation of a monolayer coating in the reaction phase is confirmed. Within the selected region of silane : silica ratio, the monolayer capacity value was determined to be 1.02 mmol g-1 on dehydrated silica gel and 0.63 mmol g-1 on the dehydroxylated substrate. The obtained monolayer structure is described and related to the specific surface area of the substrate used. APTS molecules are distributed over the silica surface with each molecule covering 64 angstrom2.
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