Ionic properties of an organic–inorganic sol–gel hybrid based on polydimethylsiloxane and tetraethoxysilane doped with sodium dodecyl sulfate

• Autor(es): Pinto, Raffael Costa de Figueiredo ; Paschoal, Carlos William de Araujo ; Paraguassu, Waldeci ; Castro Jr., Manoel Carvalho ; Boaventura Filho, Jaime Soares ; José, Nadia Mamede ; Pinto, Raffael Costa de Figueiredo ; Paschoal, Carlos William de Araujo ; Paraguassu, Waldeci ; Castro Jr., Manoel Carvalho ; Boaventura Filho, Jaime Soares ; José, Nadia Mamede
• Data: 2013
• Origem: Oasisbr
• Assunto(s): Charge transport; Composites; Interpenetrating network (IPN)
• Tipo de Documento: Artigo científico
• Idioma: Inglês

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Texto completo: acesso restrito. p. 851-854

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In this work, we performed impedance spectroscopy measurements of organically modified silicate membranes based on polydimethylsiloxane (PDMS) and tetraethoxysilane (TEOS) with the inclusion of sodium dodecyl sulfate (SDS) at five different concentrations. The results indicated that the conduction in a pure PDMS/TEOS hybrid membrane mainly resulted from a hopping mechanism. The conduction of membranes modified with the addition of SDS increased for SDS concentrations up to 20% and decreased for higher concentrations. This effect was explained on the basis of the porosity of the membranes due to SDS.