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

doi:10.11944/j.issn.1000-0518.2016.01.150195

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (1): 98-102.DOI: 10.11944/j.issn.1000-0518.2016.01.150195

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Preparation of Polythiophene/Polypyrrole/TiO₂Composite Conductive Polymers by Solid-state Method and Its Anti-corrosion Properties for Stainless Steel

XUE Shouqing^a^b^*(),LIU Qinghua^b

^aInstitute of Fine Chemicals
^bDepartment of Chemistry and Chemical Engineering,Heze University,Heze,Shandong 274015,China

Received:2015-06-11 Accepted:2015-10-21 Published:2016-01-05 Online:2016-01-05
Contact: XUE Shouqing
Supported by:
Supported by the National Natural Science Foundation of Shandong Province, China(No.ZR2014EL004)

Abstract

Abstract:

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.

Key words: polythiophene/polypyrrole/TiO2 composites, solid-phase oxidation reaction, anti-corrosion, conductive polymer film

XUE Shouqing, LIU Qinghua. Preparation of Polythiophene/Polypyrrole/TiO₂Composite 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.

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Preparation of Polythiophene/Polypyrrole/TiO₂Composite Conductive Polymers by Solid-state Method and Its Anti-corrosion Properties for Stainless Steel

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