AC Electrical Conductivity of Cr-Doped Polyaniline/Poly(Vinyl alcohol) Blends
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Sociedade Brasileira de Física
2004
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| _version_ | 1876430083010330624 |
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| author | D.A.W. Soares |
| author_facet | D.A.W. Soares |
| contents | AC Electrical Conductivity of Cr-Doped Polyaniline/Poly(Vinyl alcohol) Blends D.A.W. Soares P. H. O. de Souza R. M. Rubinger A.A.A. de Queiroz O.Z. Higa L.R. de Souza Física, Astronomía y Matemáticas Polyaniline (PANI) and their charge transfer complexes are engineering materials that continue to attract considerableattention from engineers due to their unique electrochemical behavior, environmental stability andhigh degree of processability. Extensive works on the preparation of electrically conductive PANI blends containinga polymeric matrix having desirable physical and good mechanical characteristics have pointed as apromising route to overcome the PANI intractabilities. This paper reports the electrical properties of the dichromatedPANI/poly(vinyl alcohol) (PANI:Cr3+/PVA) blends. Doped polyaniline powder in the emeraldine baseform was synthesized by the classical chemical oxidation of aniline with ammonium persulfate as the oxidantin the presence of chromium (Cr3+). The SEM (Phillips XL 30) was used to understand the changes occurringin the conductivity to a microstructure level. The distribution of PANI:Cr3+ (50% w/w) in the host polymer(PVA) show some tendency to occur in flocculated structures. The samples were cut into circular shapes toform films about 500 microns thick. Electrical contacts were made by sputtering gold over sample surfaces.We have carried out impedance spectroscopy measurements in the range of 20Hz to 1MHz. Measurementscarried at 100K and 250K indicates that thermally activated carrier process between PANI:Cr3+ grains in thePANI:Cr3+/PVA blend sample are responsible for its high temperature conductivity. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434452 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2B Vol.34 |
| format | Artículo científico |
| id | redalyc_46434452 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | AC Electrical Conductivity of Cr-Doped Polyaniline/Poly(Vinyl alcohol) Blends D.A.W. Soares Física, Astronomía y Matemáticas AC Electrical Conductivity of Cr-Doped Polyaniline/Poly(Vinyl alcohol) Blends D.A.W. Soares P. H. O. de Souza R. M. Rubinger A.A.A. de Queiroz O.Z. Higa L.R. de Souza Física, Astronomía y Matemáticas Polyaniline (PANI) and their charge transfer complexes are engineering materials that continue to attract considerableattention from engineers due to their unique electrochemical behavior, environmental stability andhigh degree of processability. Extensive works on the preparation of electrically conductive PANI blends containinga polymeric matrix having desirable physical and good mechanical characteristics have pointed as apromising route to overcome the PANI intractabilities. This paper reports the electrical properties of the dichromatedPANI/poly(vinyl alcohol) (PANI:Cr3+/PVA) blends. Doped polyaniline powder in the emeraldine baseform was synthesized by the classical chemical oxidation of aniline with ammonium persulfate as the oxidantin the presence of chromium (Cr3+). The SEM (Phillips XL 30) was used to understand the changes occurringin the conductivity to a microstructure level. The distribution of PANI:Cr3+ (50% w/w) in the host polymer(PVA) show some tendency to occur in flocculated structures. The samples were cut into circular shapes toform films about 500 microns thick. Electrical contacts were made by sputtering gold over sample surfaces.We have carried out impedance spectroscopy measurements in the range of 20Hz to 1MHz. Measurementscarried at 100K and 250K indicates that thermally activated carrier process between PANI:Cr3+ grains in thePANI:Cr3+/PVA blend sample are responsible for its high temperature conductivity. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434452 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2B Vol.34 |
| title | AC Electrical Conductivity of Cr-Doped Polyaniline/Poly(Vinyl alcohol) Blends |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434452 |