Electrochromic Properties of Polyaniline-Based Hybrid Organic/Inorganic Materials

Autor(es)

Rosanny C. Silva ^[1] ; Marina V. Sarmento ^[2] ; Roselena Faez ^[3] ; Roger J. Mortimer ^[4] ; Adriana S. Ribeiro ^[5]

Afiliação do(s) autor(es)

^[1] Universidade Federal de Alagoas. Instituto de Química e Biotecnologia - Brasil

^[2] Universidade Federal de Alagoas. Instituto de Química e Biotecnologia - Brasil

^[3] Universidade Federal de São Carlos. Laboratório de Materiais Poliméricos e Biossorventes - Brasil

^[4] Loughborough University. Department of Chemistry - Reino Unido

^[5] Universidade Federal de Alagoas. Instituto de Química e Biotecnologia - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 27, n. 10, p. 1847-1857, 2016-10-00.

Resumo

Hybrid materials based on polyaniline (PAni) were obtained by in situ polymerization of aniline with chitosan and/or organically modified clay (nanomer I-24) in HCl. The samples were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and direct current (DC) electrical conductivity. Thin films of PAni, PAni-clay, PAni-chitosan and PAni-chitosan-clay were prepared by casting a solution of each sample in N-methyl-2-pyrrolidone (NMP) onto indium tin oxide (ITO)/glass electrodes and their electrochromic properties were investigated. It was observed color variation from transparent yellow in the reduced state (E = -0.2 V vs. Ag/AgCl), green in the intermediate state (E = 0.5 V) and dark blue in the oxidized state (E = 0.8 V) for all samples. The color changes of each material in function of the applied potential were tracked using the Commission Internationale de l'Eclairage (CIE) system of colorimetry, in which the color change was much more significant for PAni-clay film. (AU)

• Processo FAPESP: 07/50742-2 - Preparação, caracterização e avaliação de propriedades de polímeros condutores híbridos nano-estruturados em meio não convencional
• Beneficiário: Roselena Faez
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores