Electrochromic Properties of Polyaniline-Based Hybrid Organic/Inorganic Materials

Journal of the Brazilian Chemical Society

Loughborough University, Loughborough, United Kingdom¹  Faez, Roselena¹  Ribeiro, Adriana S.¹  Sarmento, Marina V.¹  Silva, Rosanny C.¹  Mortimer, Roger J.¹  Universidade Federal de Alagoas, Maceió, Brazil¹  Universidade Federal de São Carlos, Araras, Brazil¹ 

关键词:  conjugated polymer;    hybrid material;    polyaniline;    chitosan;    organophilic clay;   

DOI  :  10.5935/0103-5053.20160068

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown