Correlation between Morphology, Water Uptake, and Proton Conductivity in Radiation-Grafted Proton-Exchange Membranes
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Correlation between Morphology, Water Uptake, and Proton Conductivity in Radiation-Grafted Proton-Exchange Membranes. / Balog, Sandor ; Gasser, Urs; Mortensen, Kell; Gubler, Lorenz ; Scherrer, Gunther G.; Ben youcef, Hicham .
I: Macromolecular Chemistry and Physics, Bind 211, Nr. 6, 15.03.2010, s. 635-643.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Correlation between Morphology, Water Uptake, and Proton Conductivity in Radiation-Grafted Proton-Exchange Membranes
AU - Balog, Sandor
AU - Gasser, Urs
AU - Mortensen, Kell
AU - Gubler, Lorenz
AU - Scherrer, Gunther G.
AU - Ben youcef, Hicham
PY - 2010/3/15
Y1 - 2010/3/15
N2 - An SANS investigation of hydrated proton exchange membranes is presented. Our membranes were synthesized by radiation-induced grafting of ETFE with styrene in the presence of a crosslinker, followed by sulfonation of the styrene. The contrast variation method was used to understand the relationship between morphology, water uptake, and proton conductivity. The membranes are separated into two phases. The amorphous phase hosts the water and swells upon hydration, swelling being inversely proportional to the degree of crosslinking. Hydration and proton conductivity exhibit linear dependence on swelling. Proton conductivity and volumetric fraction of water are related by a power law, indicating a percolated network of finely dispersed aqueous pores in the hydrophilic domains.
AB - An SANS investigation of hydrated proton exchange membranes is presented. Our membranes were synthesized by radiation-induced grafting of ETFE with styrene in the presence of a crosslinker, followed by sulfonation of the styrene. The contrast variation method was used to understand the relationship between morphology, water uptake, and proton conductivity. The membranes are separated into two phases. The amorphous phase hosts the water and swells upon hydration, swelling being inversely proportional to the degree of crosslinking. Hydration and proton conductivity exhibit linear dependence on swelling. Proton conductivity and volumetric fraction of water are related by a power law, indicating a percolated network of finely dispersed aqueous pores in the hydrophilic domains.
KW - Faculty of Science
KW - Energy
KW - Materialsscience
U2 - 10.1002/macp.200900503
DO - 10.1002/macp.200900503
M3 - Journal article
VL - 211
SP - 635
EP - 643
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
SN - 1022-1352
IS - 6
ER -
ID: 32143706