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Advanced anticorrosive coatings prepared from electroactive polyimide-TiO2 hybrid nanocomposite materials |
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| Authors: | Chang-Jian Weng Kuan-Yeh Huang Mei-Hui Tsai |
| Affiliation: | a Department of Chemistry and Center for Nanotechnology at CYCU, Chung Yuan Christian University, No. 200, Chung-Pei Road, Chung Li 32023, Taiwan, ROC b Department of Chemical and Materials Engineering, Chin-Yi Institute of Technology, Taichung 41111, Taiwan, ROC c Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsin-Chu 310, Taiwan, ROC |
| Abstract: | In this study, we present the first preparation and corrosion protection studies of a series of electroactive polyimide-TiO2 (EPTs) hybrid nanocomposite materials containing conjugated segments of electroactive amino-capped aniline trimer (ATs) and TiO2 nanoparticles of ∼10 nm in diameter. Redox behavior of as-prepared EPTs hybrid materials was identified by electrochemical cyclic voltammetry (CV) studies. Higher concentration of TiO2 component in as-prepare corresponding EPTs was found to reveal better corrosion protection effect on cold-rolled steel (CRS) electrode based on sequential electrochemical corrosion measurements in 5 wt.% NaCl electrolyte. Enhancement of corrosion protection of EPTs coatings on CRS electrode could be interpreted by following three possible reasons: (1) Electroactive polyimide (EPI) could act as a physical barrier coating. (2) The redox catalytic capabilities of ATs units existed in EPTs may induce the formation of passive metal oxide layers on CRS electrode. (3) The well-dispersed TiO2 nanoparticles in EPTs matrix could act as effective hinder to enhance the oxygen barrier property of EPTs. |
| Keywords: | Nanocomposite Titania Polyimide Corrosion Electroactive |
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