Effect of electrolytes on electrochromic properties and morphology of poly(2,5-dimethoxy aniline) films

Bulletin of materials science

Anuvat Sirivat¹  Bureerat Suephatthima¹  Datchanee Pattavarakorn²  Nophawan Paradee¹ 

[1] The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand$$The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, ThailandThe Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand$$;Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiangmai 50200, Thailand$$Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiangmai 50200, ThailandDepartment of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiangmai 50200, Thailand$$

关键词: Electrochromic polymer;    poly(2;    5-dimethoxyaniline);    electrochemical polymerization;    response time.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Poly(2,5-dimethoxyaniline) (PDMA) was electrochemically synthesized in oxalic (H₂C₂O₄) nitric (HNO₃) and hydrochloric (HCl) acids and deposited onto flexible indium tin oxide at various synthesis times and deposition potentials as electrochromic materials. The PDMA films were characterized by FTâ€�?�IRspectrometry, scanning electron microscopy, UVâ€�?�Vis spectrophotometry and cyclic voltammetry. All PDMA films show reversible colour changes from yellow to green corresponding to the transition from the fully reduced state to the fully oxidized state under potential switching. The surface morphology and thickness of PDMA films depend critically on the type of acids used in the electrochemical polymerization process. The morphology of PDMA are highly porous microfibres (H₂C₂O₄ and HNO₃), tiny granular aggregate (HCl) and particle agglomerate depending on the polymerization time. The fastest response time observed via colour changing of 3.7 s is obtained from the HClâ€�?�PDMA film at 3.5 volt and at the synthesis time of 6 min, as primarily due to the thickness of the film. The flexible PDMA film is demonstrated here as a potential candidate to be used in electrochromic devices.

【 授权许可】

Unknown