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Synthesis and characterization of novel organo-montmorillonites

DSpace at IIT Bombay

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Title Synthesis and characterization of novel organo-montmorillonites
 
Creator TIWARI, RAJKIRAN R
KHILAR, KC
NATARAJAN, UPENDRA
 
Subject characterization
decomposition
ion exchange
stoichiometry
 
Description Sodium Montmorillonite (NaMMT) has been modified via cation exchange reaction using three different organic cations. Basal spacings, interlamellar structure and thermal stability of these organo-montmorillonites (OMMT) clays have been characterized using wide angle X-ray diffraction (WAXD) and thermogravimetric analysis (TGA) techniques. Increase in the basal spacing due to organic modification is in good agreement with simple theoretical calculations based on van der Waals volume of the cationic ammonium ions. TGA characterization and analysis show that the amount of organic modifier in the OMMT's is in good agreement with theoretically calculated stoichiometric content expected for almost complete exchange of Na+ ions by organic cations. The OMMT's shows stepwise decomposition corresponding to initial weight loss from residual water desorption, followed by decomposition of the organic surfactant and the dehydroxylation of structural water of the montmorillonite layers.
 
Publisher Elsevier
 
Date 2009-02-17T12:06:53Z
2011-11-25T17:07:26Z
2011-12-26T13:06:00Z
2011-12-27T05:52:01Z
2009-02-17T12:06:53Z
2011-11-25T17:07:26Z
2011-12-26T13:06:00Z
2011-12-27T05:52:01Z
2008
 
Type Article
 
Identifier Applied Clay Science 38(3-4), 203-208
0169-1317
http://dx.doi.org/10.1016/j.clay.2007.05.008
http://hdl.handle.net/10054/675
http://dspace.library.iitb.ac.in/xmlui/handle/10054/675
 
Language en