Three-color electrochromism of an aramid film containing polyaniline and poly(o-phenylenediamine)

摘要

An aramid, poly(~phenylene terephthalamide)(PPTA), was prepared as a mechanically stable film. Whenaniline was electro-oxidized using the PPTA-filmed electrode, thefilm captured polyaniline (PANI). For the obtained composite film,PPTA strongly suppressed the oxidative deterioration of PANI,and fully oxidized PANI (pernigraniline form) was stable withoutdeterioration. The film showed three-color electrochromism:pale yellow (-0.4 V), green (+0.4 V), and violet (#1.2 V).Different color change was also obtained with a PANI-PoPD-PPTA composite film: vermilion (-0.4 V), green (+0.4 V), and violet (+1.2 V).