Synthesis and electrochemical properties of a novel poly(ether sulfone) with oligoaniline pendants

Abstract

A novel poly(ether sulfone) with oligoaniline pendants(PESOP) was prepared by K₂CO₃-mediated nucleophilic polycondensation and characterized with Fourier-transform infrared spectrometry(FTIR), ¹H nuclear magnetic resonance(¹H NMR) and gel permeation chromatography(GPC). The cyclic voltammetry(CV) curve of PESOP reveals the reversible electroactivity. In the electrochromism study, PESOP film exhibited good electrochromic properties with a high contrast value, moderate switching time and acceptable coloration efficiency. After running 1000 cycles, the PESOP/indium-tin oxide(ITO) electrochromic device remained unchanged except for the drifting of base line, which certified its good electro-photo stability of the fabricated electrochromic device. Moreover, the polarization technique and electrochemical impedance spectroscopy(EIS) were used to study the anticorrosion performance of PESOP coatings on the cold rolled steel(CRS) in a 5%(mass fraction) NaCl solution. All the results indicate that the obtained PESOP is a competitive candidate as anticorrosion material.

Keywords

Electroactive / Oligoaniline / Electrochromism / Anticorrosion

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