Grafting of Swelling Clay Materials with 3- aminopropyltriethoxysilane
(2005) Grafting of Swelling Clay Materials with 3- aminopropyltriethoxysilane. Journal of Colloid and Interface Science 288(1):pp. 171-176.
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Abstract
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.
| Item Type: | Journal Article |
|---|---|
| Status: | Published |
| Keywords: | 3-aminopropyltriethoxysilane; natural montmorillonite; synthetic fluorohectorite; grafting; X-ray diffraction; thermogravimetric analysis; 29Si CP/MAS NMR |
| Subjects: | 250000 Chemical Sciences > 250200 Inorganic Chemistry |
| ID Code: | 1515 |
| Deposited By: | HE, Hongping |
| Deposited On: | 13 October 2005 |
| Alternative Locations: | http://dx.doi.org/10.1016/j.jcis.2005.02.092 |
| Copyright Owner: | Copyright 2004 Elsevier |
| Copyright Statement: | Reproduced in accordance with the copyright policy of the publisher. |
| Additional Information: |