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Modification of the surfaces of Wyoming montmorillonite by the cationic surfactants alkyl trimethyl, dialkyl dimethyl and trialkyl methyl ammonium bromides

Frost, Ray L., Xi, Yunfei, & He, Hongping (2007) Modification of the surfaces of Wyoming montmorillonite by the cationic surfactants alkyl trimethyl, dialkyl dimethyl and trialkyl methyl ammonium bromides. Journal of Colloid and Interface Science, 305(1), pp. 150-158.

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Abstract

Surfaces of a Wyoming SWy-2 sodium montmorillonite were modified using microwave radiation through intercalation with the cationic surfactants octadecyltrimethylammonium bromide, dimethyldioctadecylammonium bromide and methyltrioctadecylammonium bromide by an ion exchange mechanism. Changes in the surfaces and structure were characterized using X-ray diffraction (XRD), thermal analysis (TG) and Infrared (IR) spectroscopy. Different configurations of surfactants within montmorillonite interlayer are proposed based on d(001) basal spacings. A range of surfactant molecular environments within the surface-modified montmorillonite are proposed based upon their thermal decomposition. IR spectroscopy using a smart endurance single bounce diamond attenuated total reflection (ATR) cell has been used to study the changes in the spectra of CH asymmetric and symmetric stretching modes of the surfactants to provide more information of the surfactant molecular configurations.

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114 citations in Scopus
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105 citations in Web of Science®

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ID Code: 5513
Item Type: Journal Article
Additional Information: This paper is one of a series of papers on the application of the adsorption of organic molecules on organocclays
Keywords: surfactant, organoclay, montmorillonite, adsorption, surface modification
DOI: 10.1016/j.jcis.2006.09.033
ISSN: 0021-9797
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2007 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 20 Nov 2006
Last Modified: 29 Feb 2012 23:36

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