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Nowadays, designing new proton exchange membranes that will allow fuel cell operation without extensive humidification requirement is a major challenge for polymer chemists. Efforts are made to study sulfonated and phosphonated poly(oxadiazole) (with higher hydrothermal stability) behaviors in the presence of other protogenic groups such as phenolic, amidic, and carboxylic groups. In this study, density...
In this work, poly(vinyl alcohol) (PVA) nanocomposite films were prepared using different concentrations of functionalized graphene (0, 1, 3 and 5 wt%) to study the permeability of oxygen gas in the PVA nanocomposites. For this aim, graphene layers were covalently functionalized with tris(hydroxymethyl)aminomethane (TRIS) and used as a nanofiller in the PVA matrix. The obtained PVA/TRIS-functionalized...
Two phenol-containing sulfonated polyoxadiazoles (SPOD) membranes were synthesized at high temperature and short reaction time through one-step method. The structure of polymers was characterized by various techniques. Ion exchange capacity, sulfonation degree and water-uptake of SPODs were also investigated. Polyoxadiazole based on 5-hydroxyisophthalic acid (5HIP) was insoluble in organic solvents;...
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