Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Study of the effects of the reaction conditions on the modification of clays with polyelectrolytes and sylanes
Year:2010
Research Areas
  • Macromolecules and polymers
Information
Abstract
New organically modi¿ed clays have been obtained from sodium montmorillonite, using either a cationic polyelectrolyte (polyethylenimine) or a novel homemade bisphenol-A silane as modi¿ers. The modi¿ca- tion processes have been carried out in different reaction media, in order to study the effects on the prop- erties of the modi¿ed clays of several reaction parameters, such as the pH of the polyethylenimine solution or the nature of the solvent used in the silanization. The obtained clays were characterized using X-ray diffraction, thermogravimetric analysis, and FTIR spectroscopy. Clays modi¿ed with polyelectrolyte or silane show signi¿cant increases in the basal spacing. The properties of polyelectrolyte-modi¿ed clays depend on the pH of the treating solution. The increase in the basal spacing of polyelectrolyte-modi¿ed clays varies only slightly with the pH; however, this reaction parameter clearly determines the total amount of polyelectrolyte introduced in the clay. The properties and applications of silane-modi¿ed clays are strongly dependent on the presence of water in the reaction media used for the silanization. These results have been explained by considering that the reaction conditions determine the nature and the amount of material intercalated into the clay.
International
Si
JCR
Si
Title
JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISBN
0021-9797
Impact factor JCR
3,019
Impact info
Volume
10.1016/j.jcis2009.10.014
Journal number
From page
185
To page
191
Month
ENERO
Ranking
Participants
  • Autor: Javier Arranz Andres (UPM)
  • Autor: Vicente Lorenzo Esteban (UPM)
  • Autor: Joaquin Maria Martinez Urreaga (UPM)
  • Autor: Maria Ulagares De la Orden Hernandez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Polímeros, Caracterización y Aplicaciones
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)