Journal
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
Volume 57, Issue 17, Pages 1752-1759Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/03602559.2017.1422267
Keywords
AC electric field; ball milling; composite membrane; montmorillonite nanocomposite; polybenzimidazole
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The conductivity of high temperature proton exchange membranes (HTPEM) was improved by adding Montmorillonite (MMT) with proton counter-ions H+to polybenzimidazole containing ether units (PBI-O) based membrane. During casting procedure an external AC electric field was applied to the MMT-PBI-O-based composite membranes casting solution. The introduction of MMT nanoplatelets in HTPEM significantly improved the acid doping level and conductivity, without modifying the electrochemical/chemical stability,, dimensional stability and mechanical properties of composite membranes. The conductivity of 5%-MMT-PBI-O composite membranes was improved nearly 400% compared to pure PBI-O membranes, proving that the present technique is a potential method for fabricating HTPEM with oriented MMT nanoplatelets and taking full advantage of the bulk conductivity of the MMT nanoplatelets. [GRAPHICS] .
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