Preparation, characterization and electrical conduction mechanism of polyaniline/ordered mesoporous silica composites

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dc.contributor.authorSantos Pedroso, Cassio Cardoso [UNIFESP]
dc.contributor.authorJunqueira, Vania
dc.contributor.authorLacerda Rubinger, Carla Patricia
dc.contributor.authorMartins, Tereza Silva [UNIFESP]
dc.contributor.authorFaez, Roselena [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniv Fed Itajuba
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2016-01-24T14:31:35Z
dc.date.available2016-01-24T14:31:35Z
dc.date.issued2013-04-15
dc.description.abstractIn this work, we have shown the preparation of polyaniline (PANI) and mesoporous ordered silica (SBA-15) composites. PANI/SBA-15 composites with different weight ratios were prepared in order to evaluate the electrical conduction mechanism. the analysis of the differential activation energy was carried out for composites, allowing the classification of the variable range hopping as one dimensional for the composites. the hopping parameter as a function of the sample mass ratio indicates that the insertion of aniline into the mesopores improves its intrinsic conductivity. A fibrilar morphology of the conducting PANI is formed by a controlled amount of the added polymer into SBA-15. It was confirmed by SEM and TEM analysis that the composites prepared with different PANI contents have different morphologies, indicating that the amount of polyaniline is crucial to obtain distinct morphologies. SAXS, NAI, TEM and SEM show that SBA-15 maintains its structure even after the polymerization process and the polymer is dispersed on the inorganic matrix. the parameters determined by the investigation of variable range hopping conduction by the differential activation energy method show that the PANI produced in these composites have higher electrical conductivity than pure PANI, possibly due to the improvement of the interparticle, interchain and intrachain processes for the charge transport, which are intimately related to the polymer morphology, fact coherent with SEM and TEM data. (C) 2013 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniversidade Federal de São Paulo, Inst Ciencias Ambientais Quim & Farmaceut, LMH, BR-09913030 Diadema, SP, Brazil
dc.description.affiliationUniv Fed Itajuba, Inst Ciencias Exatas, Dept Fis & Quim, BR-37500903 Itajuba, MG, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Lab Mat Polimer & Biossorventes, BR-13600970 Araras, SP, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Inst Ciencias Ambientais Quim & Farmaceut, LMH, BR-09913030 Diadema, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipINEO/INCT
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIDFAPESP: 2007/50742-2
dc.description.sponsorshipIDCNPq: 577315/2008-0
dc.format.extent11-18
dc.identifierhttp://dx.doi.org/10.1016/j.synthmet.2013.02.014
dc.identifier.citationSynthetic Metals. Lausanne: Elsevier Science Sa, v. 170, p. 11-18, 2013.
dc.identifier.doi10.1016/j.synthmet.2013.02.014
dc.identifier.issn0379-6779
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/36213
dc.identifier.wosWOS:000318667500003
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofSynthetic Metals
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.subjectConducting materialsen
dc.subjectPolymersen
dc.subjectOrdered mesoporous silicaen
dc.subjectHopping conductionen
dc.titlePreparation, characterization and electrical conduction mechanism of polyaniline/ordered mesoporous silica compositesen
dc.typeinfo:eu-repo/semantics/article
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