Electrochromic Properties of Polyaniline-Based Hybrid Organic/Inorganic Materials
Silva, Rosanny C., Sarmento, Marina V., Faez, Roselena, Mortimer, Roger J., Ribeiro, Adriana S.
J. Braz. Chem. Soc.
DATA DE PUBLICAÇÃO
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.
- Organic/inorganic hybrid materials formed from TiO2 nanoparticles and polyaniline
- Porphyrinosilica and metalloporphyrinosilica: hybrid organic-inorganic materials prepared by sol-gel processing
- Hardness and degree of conversion of dental restorative composites based on an organic-inorganic hybrid
- Structure and properties of Ti4+-ureasil organic-inorganic hybrids
- Organic-inorganic hybrid membranes in separation processes: a 10-year review