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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.; CONSTANTINO, C. J. L.; OLIVEIRA JR. O. N.; MATTOSO, L. H. C. |
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Afiliação: |
UFSCar-Departamento de Engenharia de Materiais, São Carlos, SP; USP-Instituto de Física de São Carlos, São Carlos, SP; Embrapa Instrumentação Agropecuária, São Carlos, SP. |
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Título: |
Self-assembled films of poly(o-ethoxyaniline) complexed with sulfonated lignin. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Colloids and Subsurfaces B: Biointerfaces, Amsterdam, v. 23, p. 257-262, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
The interaction of poly)o-ethoxyaniline) (POEA) doped with HC1 and sulfonated lignin (SL) was investigated using UV-Vis spectroscopy in order to probe the influence of pH and quantity of SL on the formation of a polyelectrolyte complex. The introduction of SL into the HC1 doped POEA solution screens the positive charges of the protonated POEA allowing further protons to be pumped into the conducting polymers thus increasing its doping level. In addition, the strong interaction between these two electrolytes caused POEA to remain doped within a wid pH range. Layers were built from aqueous solutions of the complex formed by POEA and SL which were alternated with either pure POEA or sulfonated polystyrene in the form of layer-by-layer films. The resultin multilayer films remained doped even at pH 9.0, due to the strong complex formation, which prevents POEA from deprotonating. Surface potential measurements showed that the potential for the POEA + SL complex is more positive than for films with each layer investigated separately, thus confirming the strong interaction between POEA and SL. |
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Palavras-Chave: |
Complexes; Conducting polymers; Espectroscopia; Polianilina; Polímero; Polyanilines; Polyelectrolytes; Self-assembly. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01830naa a2200253 a 4500
001 1024615
005 2003-04-25
008 2002 bl --- 0-- u #d
100 1 $aPATERNO, L. G.
245 $aSelf-assembled films of poly(o-ethoxyaniline) complexed with sulfonated lignin.
260 $c2002
520 $aThe interaction of poly)o-ethoxyaniline) (POEA) doped with HC1 and sulfonated lignin (SL) was investigated using UV-Vis spectroscopy in order to probe the influence of pH and quantity of SL on the formation of a polyelectrolyte complex. The introduction of SL into the HC1 doped POEA solution screens the positive charges of the protonated POEA allowing further protons to be pumped into the conducting polymers thus increasing its doping level. In addition, the strong interaction between these two electrolytes caused POEA to remain doped within a wid pH range. Layers were built from aqueous solutions of the complex formed by POEA and SL which were alternated with either pure POEA or sulfonated polystyrene in the form of layer-by-layer films. The resultin multilayer films remained doped even at pH 9.0, due to the strong complex formation, which prevents POEA from deprotonating. Surface potential measurements showed that the potential for the POEA + SL complex is more positive than for films with each layer investigated separately, thus confirming the strong interaction between POEA and SL.
653 $aComplexes
653 $aConducting polymers
653 $aEspectroscopia
653 $aPolianilina
653 $aPolímero
653 $aPolyanilines
653 $aPolyelectrolytes
653 $aSelf-assembly
700 1 $aCONSTANTINO, C. J. L.
700 1 $aOLIVEIRA JR. O. N.
700 1 $aMATTOSO, L. H. C.
773 $tColloids and Subsurfaces B: Biointerfaces, Amsterdam$gv. 23, p. 257-262, 2002.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 18 | |
| 7. |  | CAMILO, E. C.; CONSTANTINO, C. J. L.; TERUYA, M. Y.; ALVES, N.; MATTOSO, L. H. C.; JOB, A. E. Dependence of the electrical conductivity and elastomeric properties on sample preparation of blends of polyaniline and natural rubber. Journal of Applied Polymer Science, New York, v. 97, p. 1498-1503, 2005.| Biblioteca(s): Embrapa Instrumentação. |
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| 8. | | JOB, A. E.; CONSTANTINO, C. J. L.; MENDES, T. S. G.; TERUYA, M. Y.; ALVES, N.; MATTOSO, L. H. C. Polyaniline and natural rubber blends: effect of rubber inducing doping on the conducting polymer. In: MATTOSO, L. H. C.; LEÃO, A.; FROLLINI, E. (Ed.). Natural polymers and compósites IV. [São Carlos: EMBRAPA: USP; S.l.: UNESP, 2002]. 5 f. 1 CD-ROM.| Biblioteca(s): Embrapa Instrumentação. |
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| 13. | | FONSECA, R. D.; CORREA, D. S.; PARIS, E. C.; TRIBUZI, V. DEV, A. VOSS, T. AOKI, P. H. B. CONSTANTINO, C. J. L. MENDONCA, C. R. Fabrication of zinc oxide nanowires/polymer composites by two-photon polymerization. Journal of Polymer Science. Part B, Polymer Physics, Nova York, v. 52, p. 333-337, 2014.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Instrumentação. |
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| 14. | | FERREIRA, M.; CONSTANTINO, C. J. L.; RIUL JR. A.; WOHNRATH, K.; AROCA, R. F.; GIACOMETTI, J. A.; OLIVEIRA JR. O. N.; MATTOSO, L. H. C. Preparation, characterization and taste sensing properties of Langmuir-Blodgett Films from mixtures of polyaniline and rutheniu complex. Polymer, Guildford, v. 44, p. 4205-4211, 2003.| Biblioteca(s): Embrapa Instrumentação. |
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| 15. | | LEITE, F. L.; SIMOES, M. L.; OLIVEIRA NETO, M.; NASCENTE, P. A. P.; CONSTANTINO, C. J. L.; MATTOSO, L. H. C.; OLIVEIRA JUNIOR, O. N. A nanocarrier charge model for the transport in poly(o-alkoxyanilines). In: ENCONTRO DA SBPMAT, 10.; BRAZILIAN MRS MEETING, 10., 2011, Gramado. Resumos... Rio de Janeiro: SBPMat, 2011. não paginado.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 16. | | OLIVEIRA, F. A.; ALVES, N.; GIACOMETTI, J. A.; CONSTANTINO, C. J. L.; MATTOSO, L. H. C.; BALAN, A. M. O. A.; JOB, A. E. Study of the thermomechanical and electrical properties of conducting composites containing natural rubber and carbon black. Journal of applied polymer science, [s. l.], v. 106, n. 2, p. 1001-1006, 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Instrumentação. |
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| 17. | | CONSTANTINO, C. J. L.; RIUL JR. A.; VENANCIO, E. C.; CONSOLIN, N.; ANTUNES, P. A.; FONSECA, F. J.; OLIVEIRA JR. O. N.; AROCA, R. F.; MATTOSO, L. H. C. Detection limit for artifical sensors based on ultrathin films of perylene derivatives. In: INTENATIONAL SYMPOSIUM ON OLFACTION AND ELECTRONIC NOISE, 9., 2002, Rome. ISOEN' 02: book of abstracts. p. 158.| Biblioteca(s): Embrapa Instrumentação. |
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| 18. | | CONSTANTINO, C. J. L.; ANTUNES, P. A.; VENANCIO, E. C.; CONSOLIN, N.; FONSECA, F. J.; MATTOSO, L. H. C.; AROCA, R. F.; OLIVEIRA JR. O. N.; RIUL JR. A. Nanostructured films of perylene derivatives: high performance materials for taste sensor applications. Sensor letter, [S. l.], v.2, n.2, 2004, p. 95-101.| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 18 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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