Preparation and Characterization of Acrylic Polyurethane/Polyaniline Nanocomposite Coatings
International Journal of Electrochemical Science, ISSN: 1452-3981, Vol: 12, Issue: 4, Page: 2679-2691
2017
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- 20Captures
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Article Description
Acrylic polyurethane and polyaniline (APU/PANI) nanocomposite coatings with excellent protective performance were prepared with physical blending method. Then, the effect of PANI nanowire on the coating’s protective and mechanical properties was investigated. The protective performance of APU/PANI nanocomposite coatings was characterized by electrochemical impedance spectroscopy (EIS) technology. After immersion for 58 days in 3.5 wt % NaCl solution at 35 o C, the EIS results interestingly demonstrated that the original coating has the unexpected highest impedance value at about 1.57×10 10 ohms·cm 2 in all specimens. However, with the increase of PANI nanowire contents, the APU/PANI nanocomposite coating’s impedance decreased dramatically and spot corrosion occurred gradually. That is to say, PANI nanowire has the negative effect on the protection performance of the APU nanocomposite coatings system. In addition, the results also indicated that, with increase of PANI nanowire, the APU nanocomposite coating’s mechanical behavior deteriorated dramatically and water resistance decreased slightly. These experimental results will provide some helpful insights on study of PANI nanowire modified other coating systems or protective mechanism of PANI.
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