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A Study on the Electrochemical Properties of SPEEK/PWA/Silica Composite Membranes

SPEEK/PWA/Silica 복합막의 전기화학적 특성에 관한 연구

  • Oh, Sae-Joong (Department of Chemical and Biochemical Engineering, Sun-Moon University)
  • 오세중 (선문대학교 생명화학공학과)
  • Received : 2013.02.05
  • Accepted : 2013.05.09
  • Published : 2013.05.31

Abstract

Sol-gel method was utilized to prepare SPEEK/PWA electrolyte composite membranes. TEOS was used as a precursor and phosphotungstic acid(PWA) as a catalyst for the sol-gel reaction. It was observed through FE-SEM analysis that the PWA and silica nanoparticles were uniformly dispersed into the polymer matrix. The water uptake of SPEEK/PWA/silica composite membranes was less affected by TEOS concentration at higher TEOS contents, while the water uptake decreased as TEOS concentration increased at lower TEOS contents. The proton conductivity of the composite membranes showed similar trend as the water uptake of the composite membranes. The methanol permeability of SPEEK/PWA/silica composite membranes decreased as TEOS concentration increased.

Keywords

Composite membrane;Electrolyte;PWA;Silica;Sol-gel

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