Changes in suspension properties of structural modified montmorillonites

Rheological changes were found in smectite (Wyoming- and Cheto-type montmorillonites) suspensions after structural modifications. The effect of the particle size and Na+ exchange on the flow curves of 6% wt/wt suspensions of smectites with and without Na2CO3 were examined. Mineralogical, structural...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Volzone, Cristina, Garrido, Liliana Beatriz
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Química
Smectites
Montmorillonite suspensions
Rheology
Esmectitas
Suspensões de montmorillonita
Reologia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/120162
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-120162
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Smectites
Montmorillonite suspensions
Rheology
Esmectitas
Suspensões de montmorillonita
Reologia
spellingShingle Química
Smectites
Montmorillonite suspensions
Rheology
Esmectitas
Suspensões de montmorillonita
Reologia
Volzone, Cristina
Garrido, Liliana Beatriz
Changes in suspension properties of structural modified montmorillonites
topic_facet Química
Smectites
Montmorillonite suspensions
Rheology
Esmectitas
Suspensões de montmorillonita
Reologia
description Rheological changes were found in smectite (Wyoming- and Cheto-type montmorillonites) suspensions after structural modifications. The effect of the particle size and Na+ exchange on the flow curves of 6% wt/wt suspensions of smectites with and without Na2CO3 were examined. Mineralogical, structural and physicochemical characteristics were studied by X-ray diffraction (XRD), infrared spectroscopy (IR), cationic exchange capacity (CEC), Mg2+, Al3+ determinations, particle size distribution and swelling index (SI). Grinding in an oscillating mill modified the particle sizes. The montmorillonite grain size and the structural disorder increased after larger grinding times. The grinding treatment modified the apparent viscosity and the yield stress of the montmorillonite suspensions. The homoionic Na Cheto-type montmorillonite with fine particle size (obtained by grinding) increased the flow properties. Nevertheless, rheological properties were lower than those of suspensions of the Wyoming-type montmorillonite. Montmorillonite-types reacted differently with Na2CO3 additions and this behavior may be related to their structural composition. The Na2CO3 activation improved the flow properties of the original Wyoming-type montmorillonite and after 30 s grinding.
format Articulo
Articulo
author Volzone, Cristina
Garrido, Liliana Beatriz
author_facet Volzone, Cristina
Garrido, Liliana Beatriz
author_sort Volzone, Cristina
title Changes in suspension properties of structural modified montmorillonites
title_short Changes in suspension properties of structural modified montmorillonites
title_full Changes in suspension properties of structural modified montmorillonites
title_fullStr Changes in suspension properties of structural modified montmorillonites
title_full_unstemmed Changes in suspension properties of structural modified montmorillonites
title_sort changes in suspension properties of structural modified montmorillonites
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/120162
work_keys_str_mv AT volzonecristina changesinsuspensionpropertiesofstructuralmodifiedmontmorillonites
AT garridolilianabeatriz changesinsuspensionpropertiesofstructuralmodifiedmontmorillonites
AT volzonecristina mudancasempropriedadesdesuspensoesdemontmorilonitasmodificadasestruturalmente
AT garridolilianabeatriz mudancasempropriedadesdesuspensoesdemontmorilonitasmodificadasestruturalmente
bdutipo_str Repositorios
_version_ 1764820449414348800

Ejemplares similares