Original title: Thermal behaviour of organically modified clays
Authors: Plevová, Eva ; Vaculíková, Lenka ; Vítámvásová, E. ; Šugárková, Věra ; Martynková, G.S.
Document type: Papers
Conference/Event: NANO OSTRAVA 2013 - 3rd Nanomaterials and Nanotechnology Meeting, Ostrava (CZ), 2013-06-17 / 2013-06-20
Year: 2013
Language: eng
Abstract: The clay minerals were modified by two alkylammonium cations under sorption procedure. T X-ray powder diffraction and FT-IR spectroscopy were used to evaluate the intercalation process of organic cations int the clay structure. The organo - montmorillonites exhibited IR spectra giving evidence about sorption or intercalation of the alkylammonium cations. The enhancement of the basal spacing obtained by X-ray diffraction confirmed the intercalation process of cations into montmorillonite and vermiculite samples. Thermal behaviour of the modified clay minerals was investigated by simultaneous thermogravimetry and differential thermal analysis. The organically modified montmorillonites exhibited the higher values of temperatures related to the total melting. Also the temperatures of exotherm effects connected to recrystallization and transformation increased with the concentration of alkylammonium salts. The temperatures of dehydratation and dehydroxilation decreased with concentration of alkylammonium cations. Vermilulite samples showed generally reducing of their thermal stability.
Keywords: alkylammonium cations; clay minerals; intercalation; thermal analysis
Project no.: ED2.1.00/03.0082
Funding provider: GA MŠk
Host item entry: Nano Ostrava 2013, ISBN 978-80-7329-361-1
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.

Institution: Institute of Geonics AS ČR (web)
Original record: http://hdl.handle.net/11104/0221954

Permalink: http://www.nusl.cz/ntk/nusl-155358


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