ELECTROCHROMIC WINDOW BASED ON POLY(ANILINE-N-BUTYLSULFONATE)S WITH ARADIATION-CURED SOLID POLYMER ELECTROLYTE FILM

Electrochromic properties of poly(aniline N-butylsulfonate)s (PANBUS) coatings on indium-tin oxide (ITO) glasses exposed to an ion conductin g polymer films were investigated. The ion conducting polymer films we re prepared via photocross-linking reactions of methoxy polyethylene g lycol-mono methacrylate with tri(propylene glycol) diacrylate in the p resence of a photoinitiator and LiClO4. Mechanical properties of the e lectrolyte film were enhanced by introducing styrene or butylmethacryl ate into the polymer network. Color contrast and optical response of t he PANEUS-based window were improved by adding Nafion into the electro lyte. The electrochromic (EC) window assembled with PANBUS, Nafion con taining polymer electrolyte film, and tungsten trioxide coated ITO gla ss (type 2) required less energy for operation (+/- 1.5 V) compared to the EC window without tungsten trioxide film (type 1, +/- 2.0 V). By applying +/- 1.5 V, optical density of the type 2 window changed from zero to maximum of 1.2, corresponding transmission change of higher th an 95%. Lifetime tests show that the type 2 window could support more than 2.3 x 10(3) cycles, of 60 s duration.