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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
25/04/2003 |
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Data da última atualização: |
25/04/2003 |
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Autoria: |
PATERNO, L. G.; MATTOSO, L. H. C. |
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Afiliação: |
UFSCar-Departaento de Engenharia de Materiais, São Carlos, SP; Embrapa Instrumentação Agropecuária, São Carlos, SP. |
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Título: |
Influence of different dopants on the adsorption, morphology, and properties of self-assembled films jof poly(o-ethoxyaniline). |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Journal of Applied Polymer Science, New York, v. 83, p. 1309-1316, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
Self-assembled films of poly(o-ethoxyaniline)-POEA alternated with sulfonated lignin (SL)-were sucessfully produced, and their kinetics of formation and growth investigated for different dopants (hydrochloric acid, methanesulfonic acid, p-toluenesulfonic acid, and camphosrsulfonic acid). These films were characterized by ultraviolet-visible spectroscopy, atomic force microscopy, surface potential, and electrical resistance measurements. It has been observed that the bulkiest dopants led to a greater time for the polymer deposition and greater abount of material adsorbed. This can be explained by the lower mobility and lower solvation of the bulkiest dopant counterions, which led to a higher screening effect of the charges present in the POEA chains and therefore to a more compact molecular conformation. The morphology of the POEA films were also gratly affected by the type of dopant used, being rougher for the bulkiest dopants. The POEA films also exhibited different electrical responses upon ethylene exposure depending on the dopant, indicating a promissing user for gas sensor applications. |
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Palavras-Chave: |
Derivatives; Dopant; Polyaniline; Self-assembly films. |
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Thesaurus Nal: |
adsorption. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01708naa a2200193 a 4500
001 1024609
005 2003-04-25
008 2002 bl --- 0-- u #d
100 1 $aPATERNO, L. G.
245 $aInfluence of different dopants on the adsorption, morphology, and properties of self-assembled films jof poly(o-ethoxyaniline).
260 $c2002
520 $aSelf-assembled films of poly(o-ethoxyaniline)-POEA alternated with sulfonated lignin (SL)-were sucessfully produced, and their kinetics of formation and growth investigated for different dopants (hydrochloric acid, methanesulfonic acid, p-toluenesulfonic acid, and camphosrsulfonic acid). These films were characterized by ultraviolet-visible spectroscopy, atomic force microscopy, surface potential, and electrical resistance measurements. It has been observed that the bulkiest dopants led to a greater time for the polymer deposition and greater abount of material adsorbed. This can be explained by the lower mobility and lower solvation of the bulkiest dopant counterions, which led to a higher screening effect of the charges present in the POEA chains and therefore to a more compact molecular conformation. The morphology of the POEA films were also gratly affected by the type of dopant used, being rougher for the bulkiest dopants. The POEA films also exhibited different electrical responses upon ethylene exposure depending on the dopant, indicating a promissing user for gas sensor applications.
650 $aadsorption
653 $aDerivatives
653 $aDopant
653 $aPolyaniline
653 $aSelf-assembly films
700 1 $aMATTOSO, L. H. C.
773 $tJournal of Applied Polymer Science, New York$gv. 83, p. 1309-1316, 2002.
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Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 1.552 | |
| 9. |  | MATTOSO, L. H. C. Using nanotechnology to develop natural polymer composites. In: INTERNATIONAL MACROMOLECULAR COLLOQUIUM - IMC, 11.; INTERNATIONAL SYMPOSIUM ON NATURAL POLYMERS AND COMPOSITES - ISNaPol, 6., 2007, Gramado, RS. Natural polymers and composites. Resumos... [São Carlos: ABPol, 2007]. não paginado. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 14. | | PARIS, E. C.; MATTOSO, L. H. C. Síntese e caracterização de filmes finos de ZnO depositados por Dip-coating e evaporação por canhão de elétrons. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 8, 2014, Juiz de fora. Anais... São Carlos: Embrapa Instrumentação; Campo Grande: Embrapa Gado de Corte; Juiz de Fora: Embrapa Gado de Leite, 2014. p. 62-64. Editores: Maria Alice Martins, Humberto de Mello Brandão, Marlene de Barros Coelho, Daniel Souza Corrêa, Caue Ribeiro, Luiz Henrique Capparelli Mattoso.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 15. | | JOSEPH, K.; MATTOSO, L. H. C. Sisal fibre reinforced polymer composites: status and future. In: INTERNATIONAL SYMPOSIUM ON NATURAL POLYMERS AND COMPOSITES-ISNaPol/2000, 3.; WORKSHOP ON PROGRESS IN PRODUCTION AND PROCESSING OF CELLULOSIC FIBRES AND NATURAL POLYMERS, 2000, São Pedro. Natural polymers and composites. São Carlos: Embrapa Instrumentação Agropecuária: USP-IQSC; Botucatu: UNESP, 2000. p. 333-343. Editors: Luiz Henrique Capparelli Mattoso, Alcides Leão, Elisabete Frollini.| Biblioteca(s): Embrapa Instrumentação. |
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| 20. | | RAJA, S.; MATTOSO, L. H. C. Surface modification on cellulose nanocrystals (CNC) towards organic redox - batteries. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 9., 2017, São Carlos. Anais ... São Carlos: Embrapa Instrumentação, 2017. p.609-612. Editores: Caue Ribeiro de Oliveira, Elaine Cristina Paris, Luiz Henrique Capparelli Mattoso, Marcelo Porto Bemquerer, Maria Alice Martins, Odílio Benedito Garrido de Assis.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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