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Development and characterization of a flexible electrochromic device based on polyaniline and enzymatically synthesized poly (gallic acid)

2016; Elsevier BV; Volume: 223; Linguagem: Inglês

10.1016/j.synthmet.2016.11.038

1879-3290

Jesús Díaz-Sánchez, Alberto Rosas‐Aburto, Eduardo Vivaldo‐Lima, José M. Hernández-Alcántara, Isabel Gracia‐Mora, Humberto Vázquez‐Torres, L.C. Ordóñez, Pedro Roquero, Miquel Gimeno,

Transition Metal Oxide Nanomaterials

An effective polyaniline-based electrochromic device was successfully achieved using the enzyme-mediated poly (gallic acid) as a polyaniline polymerization template. Poly (gallic acid) proved non-toxic upon the conducted cytotoxicity assays. Thermogravimetric analysis of the novel polyaniline-poly (gallic acid) complex displayed a remarkable increase in thermal stability compared to polyaniline-HCl doped, polyaniline-poly (styrene sulfonate), polyaniline-poly (isobutylene-alt-maleic anhydride) complexes. Polyaniline-poly (gallic acid) water dispersion was readily processed by spray-coating on indium tin oxide-poly (ethylene terephthalate) sheet. These novel electrode was employed as an electroactive layer in flexible electrochromic device with propylene carbonate-poly (methyl methacrylate)-LiClO4 polymer electrolyte. The transmittance of the electrochromic device at 650 nm in a wide voltage range varied from 59% (−0.87 V) to 37.1% (+0.33 V) giving an optical contrast of 22% and a life up to 700 cycles.