Characterization of fine-grained montmorillonite fractions suitable for composite preparation

0507872 - ÚGN 2020 CZ eng A - Abstract
Valovičová, Věra - Vaculíková, Lenka - Plevová, Eva - Dolinská, S. - Znamenáčková, I. - Danková, Z.
Characterization of fine-grained montmorillonite fractions suitable for composite preparation.
Book of Abstracts, NanoOstrava2019. Ostrava: VŠB-Technická univerzita Ostrava, 2019. s. 58-58. ISBN 978-80-248-4290-5.
[NanoOstrava 2019 - Nanomaterials and Nanotechnology Meeting /6./. 13.05.2019-16.05.2019, VŠB - Technická univerzita Ostrava]
R&D Projects: GA MŠMT(CZ) LO1406
Institutional support: RVO:68145535
Keywords : montmorillonite * activation * characterization * composites
OECD category: Analytical chemistry

The aim of this experimental study was to characterize a fine-grained fraction of montmorillonites (SAz-2, STx-1, SWy-2 and Kunipia-F). It was investigated in order to provide more precise information of used montmorillonites than could be obtained by analysis of the unfractioned montmorillonites. At first, the fine fraction of montmorillonites were prepared by sedimentation and activation by means of Na2CO3. The prepared clay materials were characterized by the X-ray diffraction analysis and FTIR spectroscopy. The thermal behaviour of the studied samples was determinated according to the characteristic temperatures obtained from TG/DTA curves. The temperatures of dehydratation and dehydroxylation were evaluated and kinetic parameters were also calculated. The porosity and surface properties of the studied samples were gained by the nitrogen adsorption measurements. The obtained results confirmed that the fine fraction of montmorillonites could be a suitable material for subsequent preparation of composites with enhanced sorption properties, especially montmorillonite/MnO2 composite.
Permanent Link: http://hdl.handle.net/11104/0298829