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Citation: XUE Shouqing, LIU Qinghua. Preparation of Polythiophene/Polypyrrole/TiO2 Composite Conductive Polymers by Solid-state Method and Its Anti-corrosion Properties for Stainless Steel[J]. Chinese Journal of Applied Chemistry, ;2016, 33(1): 98-102. doi: 10.11944/j.issn.1000-0518.2016.01.150195 shu

Preparation of Polythiophene/Polypyrrole/TiO2 Composite Conductive Polymers by Solid-state Method and Its Anti-corrosion Properties for Stainless Steel

  • 1.

    a Institute of Fine Chemicals, Heze University, Heze, Shandong 274015, China;

  • 2.

    b Department of Chemistry and Chemical Engineering, Heze University, Heze, Shandong 274015, China

  • Corresponding author: XUE Shouqing, 
  • Received Date: 11 June 2015
    Available Online: 21 October 2015

    Fund Project:

  • Polythiophene(PTH)/Polypyrrole(PPY)/TiO2 conductive polymer composites materials were prepared by chemical solid-phase oxidation reaction in the presence of TiO2 nanoparticles and ferric chloride at room temperature. X-ray crystallography(XRD), scanning electron microscopy(SEM), Fourier transform infrared spectroscopy(FT-IR), thermogravimetric analysis(TG) and electrochemical impedance spectroscopy(EIS) were employed to characterize the morphology, thermal stability and anti-corrosion properties of the composites with different dopping amounts of nano-TiO2. PTH/PPy/6% TiO2 conductive polymer film at the application temperature(20~300℃) meets the anti-corrosion requirements to prevent the stainless steel corrosion with a 0.8 V potential higher than the free corrosion potential of bare stainless steel, while the corrosion current densities are lower two orders of magnitude. Nano-TiO2 improves the anode protection and the anti-corrosion properties of the PTH/PPY material. Furthermore, nano-TiO2 bends the polymer tightly to increase the mechanical properties of the composites by reducing membrane defects.
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