SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GEL

SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GEL

Hybrid nanocomposites based on siloxane sols, chitosan and poly(monomethyl itaconate) (PMMI) as organic polymer counterparts were prepared. Tetraethyl ortosilicate was used as inorganic network forming reagent that was first transformed into soluble polymeric species by acid catalyzed hydrolysis and...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Martínez,Y., Retuert,J., Yazdani-Pedram,M.
Lenguaje:English
Publicado: Sociedad Chilena de Química 2004
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200004
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:scielo:S0717-97072004000200004
record_format dspace
spelling oai:scielo:S0717-970720040002000042005-09-21SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GELMartínez,Y.Retuert,J.Yazdani-Pedram,M.Hybrid nanocomposites based on siloxane sols, chitosan and poly(monomethyl itaconate) (PMMI) as organic polymer counterparts were prepared. Tetraethyl ortosilicate was used as inorganic network forming reagent that was first transformed into soluble polymeric species by acid catalyzed hydrolysis and condensation reactions. The siloxane sol was then mixed with different amounts of PMMI and chitosan at room temperature to form the hybrid material. These hybrid materials could be easily cast as transparent and flexible films. Atomic force microscopy study showed that the organic components are more or less homogeneously distributed at nanometer scale. The hybrid films were used as membranes for the construction of all-solid-state type potentiometric electrodes. The ion-sensing capacity of the nanocomposite was tested for different anions and the best results were obtained for NO3-. It was concluded that the ­NH3+HCOO- groups of chitosan act as anion exchanger creating a potential difference that vary with ion concentration in solution in the concentration range of 1.5 ·10-4 ­ 10-2 mol/dm³info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.49 n.2 20042004-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200004en10.4067/S0717-97072004000200004
institution Scielo Chile
collection Scielo Chile
language English
description Hybrid nanocomposites based on siloxane sols, chitosan and poly(monomethyl itaconate) (PMMI) as organic polymer counterparts were prepared. Tetraethyl ortosilicate was used as inorganic network forming reagent that was first transformed into soluble polymeric species by acid catalyzed hydrolysis and condensation reactions. The siloxane sol was then mixed with different amounts of PMMI and chitosan at room temperature to form the hybrid material. These hybrid materials could be easily cast as transparent and flexible films. Atomic force microscopy study showed that the organic components are more or less homogeneously distributed at nanometer scale. The hybrid films were used as membranes for the construction of all-solid-state type potentiometric electrodes. The ion-sensing capacity of the nanocomposite was tested for different anions and the best results were obtained for NO3-. It was concluded that the ­NH3+HCOO- groups of chitosan act as anion exchanger creating a potential difference that vary with ion concentration in solution in the concentration range of 1.5 ·10-4 ­ 10-2 mol/dm³
author Martínez,Y.
Retuert,J.
Yazdani-Pedram,M.
spellingShingle Martínez,Y.
Retuert,J.
Yazdani-Pedram,M.
SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GEL
author_facet Martínez,Y.
Retuert,J.
Yazdani-Pedram,M.
author_sort Martínez,Y.
title SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GEL
title_short SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GEL
title_full SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GEL
title_fullStr SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GEL
title_full_unstemmed SENSING PROPERTIES OF HYBRID POLYMERIC FILMS OBTAINED BY SOL-GEL
title_sort sensing properties of hybrid polymeric films obtained by sol-gel
publisher Sociedad Chilena de Química
publishDate 2004
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200004
work_keys_str_mv AT martinezy sensingpropertiesofhybridpolymericfilmsobtainedbysolgel
AT retuertj sensingpropertiesofhybridpolymericfilmsobtainedbysolgel
AT yazdanipedramm sensingpropertiesofhybridpolymericfilmsobtainedbysolgel
_version_ 1718445337182470144

Ejemplares similares