Radiation-grafted proton exchange membranes based on co-grafting from binary monomer mixtures into poly(ethylene-co-tetrafluoroethylene) (ETFE) film

2012 ◽  
Vol 81 (8) ◽  
pp. 923-926 ◽  
Author(s):  
Joon-Yong Sohn ◽  
Hae-Jun Sung ◽  
Joo-Myung Song ◽  
Junhwa Shin ◽  
Young-Chang Nho
Keyword(s):  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Poly Ethylene ◽  
Grafting From ◽  
Etfe Film

scholarly journals Correlation between Morphology, Water Uptake, and Proton Conductivity in Radiation Grafted Proton Exchange Membranes

2010 ◽  
Vol 1269 ◽  
Author(s):  
Sandor Balog ◽  
Urs Gasser ◽  
Kell Mortensen ◽  
Lorenz Gubler ◽  
Hicham Ben youcef ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Water Uptake ◽  
Random Network ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Variation Method ◽  
Radiation Induced ◽  
Poly Ethylene ◽  
Two Phases ◽  
The Relationship

AbstractA small-angle neutron scattering (SANS) investigation of saturated aqueous proton exchange membranes is presented. Our membranes were synthesized by radiation-induced grafting of poly(ethylene-alt-tetrafluoroethylene) (ETFE) with styrene in the presence of crosslinker (divinylbenzene, DVB) and the polystyrene was sulfonated subsequently. The contrast variation method was used to understand the relationship between morphology, water uptake, and proton conductivity. We find that the membranes are separated into two phases, mostly following the morphology already defined in the semi-crystalline ETFE base film. The amorphous phase hosts the water and swells upon hydration, swelling being inversely proportional to the degree of crosslinking. Proton conductivity and volumetric fraction of water are related by a power law, indicating a percolated and most likely random network of finely dispersed aqueous pores in the hydrophilic domains.

Sign in / Sign up

Export Citation Format

Share Document