Síntese e caracterização de derivados de polipirrol para aplicação em dispositivos eletroquímicos
In this study was studied the capacitive properties of films poly (12-pyrrol-1 yl dodecanoic acid) and electrochromic properties of films poly [1 - (3-brominepropylpyrrole)] prepared by electrochemical methods and deposited on ITO. The polymers were obtained using electrochemical methods and charact...
| Autor: | |
|---|---|
| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | Brasil |
| Institución: | Universidade Federal de Alagoas (UFAL) |
| Repositorio: | Repositório Institucional da Universidade Federal de Alagoas (UFAL) |
| Idioma: | portugués |
| OAI Identifier: | oai:www.repositorio.ufal.br:riufal/1097 |
| Acceso en línea: | http://repositorio.ufal.br/handle/riufal/1097 |
| Access Level: | acceso abierto |
| Palabra clave: | Polímeros condutores Polipirrol Dispositivos eletroquímicos Conductive polymer Polypyrrole Electrochemical devices CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
| Sumario: | In this study was studied the capacitive properties of films poly (12-pyrrol-1 yl dodecanoic acid) and electrochromic properties of films poly [1 - (3-brominepropylpyrrole)] prepared by electrochemical methods and deposited on ITO. The polymers were obtained using electrochemical methods and characterized by electrochemical, morphological and optical techniques. Cyclic voltammograms of both polymers showed the presence of a redox couple attributed to the doping-undoped process the polymer. The analysis by infrared spectroscopy for poly (12-pyrrol-1 yl dodecanoic acid) suggested the coupling of the monomers through the alpha positions. The capacitive properties of a poly (12-pyrrol-1 yl dodecanoic acid) were investigated by calculation of the coulombic efficiency (86.6%) and specific capacitance (291 F g-1) obtained from the charge-discharge curves of films obtained by galvanostatic method. The values obtained for these parameters demonstrated the possibility of applications of these films in capacitive devices. The UV-Vis spectra for films of poly [1 - (3-brominepropylpyrrole)] showed absorption bands at  = 335 and 500 nm. The films of poly [1 - (3-brominepropylpyrrole)] show variations in color depending on the applied potential. The electrochromic properties of these films were investigated by calculation of chromatic contrast (18.97 and 20.46 %), coulombic efficiency (61.1%), and electrochromic (248.6 and 470.2 cm2 C-1). The values obtained for these parameters demonstrated the possibility of applications of these films in electrochromic devices |
|---|