Grafting of Swelling Clay Materials with 3- aminopropyltriethoxysilane

He, Hongping, Duchet, Jannick, Galy, Jocelyne, & Gerard, Jean-Francois (2005) Grafting of Swelling Clay Materials with 3- aminopropyltriethoxysilane. Journal of Colloid and Interface Science, 288(1), pp. 171-176.

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The grafting reaction between a trifunctional silylating agent and two kinds of 2:1 type layered silicates was studied using FTIR, XRD, TGA and 29Si CP/MAS NMR. XRD patterns clearly indicate the introduction of 3-aminopropyltriethoxysilane (γ-APS) into the clay interlayer. In the natural montmorillonite, γ-APS adopts a parallel-bilayer while it adopts a parallel-monolayer arrangement in the synthetic fluorohectorite. These different silane arrangements have a prominent effect on the mechanism of the condensation reaction within the clay gallery. In natural montmorillonite, the parallel-bilayer arrangement of γ-APS results in bidentate (T2) and tridendate (T3) molecular environment while the parallel-monolayer arrangement leads to monodentate (T1), as indicated by 29Si CP/MAS NMR spectra. This study demonstrates that the silylation reaction and the interlayer microstructure of the grafting products strongly depend on the original clay materials.

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ID Code: 1515
Item Type: Journal Article
Refereed: Yes
Keywords: 3, aminopropyltriethoxysilane, natural montmorillonite, synthetic fluorohectorite, grafting, X, ray diffraction, thermogravimetric analysis, 29Si CP/MAS NMR
DOI: 10.1016/j.jcis.2005.02.092
ISSN: 0021-9797
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2004 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 13 Oct 2005 00:00
Last Modified: 09 Jun 2010 12:25

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