Journal
RSC ADVANCES
Volume 5, Issue 90, Pages 74054-74064Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra12941a
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- Renewable Energy Research Center (Amirkabir University of Technology, Tehran, Iran)
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In this study, sulfonated graphene oxide (SGO)/Fe3O4 nanosheets were synthesized by hydrothermal method and incorporated into blend sulfonated poly(ether ether ketone) (SPEEK)/poly(vinyl alcohol) (PVA) matrix with different weight percent of (SGO)/Fe3O4 nanosheets. The performances of prepared membranes were investigated by water uptake, membrane swelling, mechanical and thermal stability, proton conductivity, methanol permeability and DMFC test. It was found that the water uptake and tensile strength of SPEEK membrane increased and proton conductivity and power density decreased by blending with PVA. Incorporation of SGO/Fe3O4 nanosheets into SPEEK/PVA matrix enhanced mechanical stability, proton conductivity and methanol barrier properties of membrane. The SPEEK/PVA/SGO/Fe3O4 nanocomposite membrane with optimal nanosheets content (5 wt%) exhibits low methanol permeability (8.83 x 10(-7) cm(2) s(-1)), high tensile strength (51.2 MPa), high proton conductivity (0.084 S cm(-1) at 25 degrees C) and high power density (122.7 mW cm(-2) at 80 degrees C) and suggests its potential application in DMFCs.
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