کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1279350 | 1497580 | 2011 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Hybrid composite membranes based on SPEEK and functionalized PPSU for PEM fuel cells Hybrid composite membranes based on SPEEK and functionalized PPSU for PEM fuel cells](/preview/png/1279350.png)
Composite membranes formed by sulfonated poly-ether-ether-ketone (SPEEK) and sulfonated and/or silylated poly-phenyl-sulfone ((Si,S)PPSU) were prepared. (Si,S)PPSU was used as anchor phase to reinforce membranes based on SPEEK with high degree of sulfonation, which is proton conducting but morphologically unstable. The ionomer membranes were characterized by several techniques, including high resolution thermogravimetric analysis, static and dynamic mechanical measurements, water uptake by immersion and in vapour phase. Properties of hybrid blends with 93 wt% SPEEK and 7 wt% of (Si,S)PPSU were compared to those of pure SPEEK. Thermal properties are discussed in view of ionomer composition. The presence of bulky phenyl-silanol groups leads to an evident reduction of water uptake and greatly enhanced mechanical strength.
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 13, July 2011, Pages 8063–8069