Chem. J. Chinese Universities ›› 2016, Vol. 37 ›› Issue (11): 2025.doi: 10.7503/cjcu20160390

• Physical Chemistry • Previous Articles     Next Articles

Synthesis and Anti-corrosion Properties of Polyaniline/Polypyrrole-nano Silicon Dioxide Composite Membrane

LI Chuanxian, SHI Enhua, YANG Shuang, YAO Bo, YANG Fei*(), YAN Qun   

  1. College of Pipeline and Civil Engineering, China University of Petroleum(East China),Shandong Key Laboratory of Oil & Gas Storage and Transport Safety Engineering, Qingdao 266580, China
  • Received:2016-05-30 Online:2016-11-10 Published:2016-10-20
  • Contact: YANG Fei E-mail:yf9712220@sina.com

Abstract:

In this article, polyaniline/polypyrrole-nanosilicon dioxide(PAni/PPy-SiO2) composite membrane was prepared by cyclic voltammetry(CV) method on the surface of 316 stainless steel(316SS). The electrochemical polymerization process, structural and morphological characteristics of polyaniline(PAni), polyaniline/polypyrrole(PAni/PPy) and PAni/PPy-SiO2 membranes were investigated by cyclic voltammetry(CV), Fourier transform infrared spectroscopy(FTIR), X-ray photoelectron spectroscopy(XPS) and scanning electron microscopy(SEM), respectively. The antiseptic properties of PAni, PAni/PPy and PAni/PPy-SiO2 membranes to stainless steel were studied by the Tafel polarization curve and electrochemical impedance spectroscopy(EIS) in 3.5%(mass fraction) NaCl aqueous solution. The results show that PAni/PPy-SiO2 composite membrane can form on the surface of 316 stainless steel by electrochemical process. Compared with PAni and PAni/PPy membranes, PAni/PPy-SiO2 composite membrane has tighter surface structure. The metal protection ability of PAni/PPy-SiO2 is better than those of PAni/PPy and PAni membranes. The anti-corrosion ability of membrane is improved because of the strengthening mechanical shielding effect of membrane with nano SiO2 and the inhibition of charge transfer during the corrosion reaction process.

Key words: Polyaniline, Polypyrrole, Silica, Composite membrane, Anti-corrosion performance

CLC Number: 

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