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http://dx.doi.org/10.5762/KAIS.2013.14.5.2529

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

Oh, Sae-Joong (Department of Chemical and Biochemical Engineering, Sun-Moon University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.5, 2013 , pp. 2529-2535 More about this Journal
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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