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Journal of Chemistry
Volume 2013, Article ID 274838, 10 pages
Research Article

Investigation of the Orientation of C T A + Ions in the Interlayer of CTAB Pillared Montmorillonite

1Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkey
2Department of Chemistry, K.K. Education Faculty, Atatürk University, 25240 Erzurum, Turkey

Received 19 June 2012; Accepted 9 July 2012

Academic Editor: Huu Hao Ngo

Copyright © 2013 Semra Karaca et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The orientation of CTA+ in the interlayer of organic pillared montmorillonite prepared by adding different amounts of surfactant corresponding to the CEC of the pristine clay mineral has been studied using X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectra. Morphology of the samples was examined by scanning electron microscopy (SEM). The results are supported by the measurements of zeta potentials and contact angles of pristine clay and organoclay samples. From the XRD results, a series of arrangement models of CTA+ in the interlayer of montmorillonite have been proposed as lateral-bilayer, pseudotrilayer, paraffin-type-monolayer and pseudotrilayer, paraffin-type-bilayer and pseudotrilayer for 0.5, 1, 1.5, and 2.0 CEC, respectively. FTIR spectrum and contact angle measurements of pristine montmorillonite and organoclays indicated the incorporation of surfactant and the changing of hydrophility in the different OMts. This study demonstrates that not only the arrangement model of surfactant, but also the morphology of organoclay strongly depends on the surfactant packing density within the montmorillonite interlayer space. In addition, it can be also proposed that, the magnitude of surface charge or its distribution on clay mineral might be an important factor for expansion characteristics of organoclay.