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.
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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|Item Type:||Journal Article|
|Keywords:||3, aminopropyltriethoxysilane, natural montmorillonite, synthetic fluorohectorite, grafting, X, ray diffraction, thermogravimetric analysis, 29Si CP/MAS NMR|
|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|
|Last Modified:||09 Jun 2010 22:25|
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