๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Proton conductive membranes of sulfonated poly(ether ketone ketone)

โœ Scribed by S. Vetter; B. Ruffmann; I. Buder; S.P. Nunes

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
256 KB
Volume
260
Category
Article
ISSN
0376-7388

No coin nor oath required. For personal study only.

โœฆ Synopsis

Poly(ether ketone ketone) was sulfonated using fumic sulfuric acid and used for preparation of proton conductive membranes. The sulfonation degree was evaluated by elemental and thermal analysis and the IEC values were determined by titration. The proton conductivity of membranes with sulfonation degrees up to 70% was determined as a function of temperature by impedance spectroscopy. Membranes with sulfonation degree 38-70% were tested in DMFC experiments. Their performance was comparable to Nafion ยฎ with the same pretreatment and clearly better than sulfonated poly(ether ether ketone) membranes with similar functionalization. The methanol crossover was lower than that of Nafion ยฎ in the same conditions.

๐Ÿ“œ SIMILAR VOLUMES

Layer-by-layer self-assembly of polyanil
Layer-by-layer self-assembly of polyaniline on sulfonated poly(arylene ether ketone) membrane with high proton conductivity and low methanol crossover
โœ Chengji Zhao; Haidan Lin; Qiang Zhang; Hui Na ๐Ÿ“‚ Article ๐Ÿ“… 2010 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 829 KB

Sulfonated poly(arylene ether ketone) bearing carboxyl groups (SPAEK-C) membranes were first modified by alternating deposition of oppositely charged polyaniline (PANI) and phosphotungstic acid (PWA) via the layer-by-layer method in order to prevent the crossover of methanol in a direct methanol fue

Synthesis and characterization of sulfon
Synthesis and characterization of sulfonated poly(ether sulfone ether ketone ketone) for proton exchange membranes
โœ Weihua Zhou; Jichun Xiao; Yiwang Chen; Rong Zeng; Shuqin Xiao; Xiaohui He; Fan L ๐Ÿ“‚ Article ๐Ÿ“… 2010 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 664 KB

## Abstract A series of sulfonated poly(ether sulfone ether ketone ketone) (SPESEKK) with different degree of sulfonation (DS) are prepared by the postsulfonation of PESEKK using chlorosulfonic acid as sulfonating agent and concentrated sulfuric acid as solvent. The chemical structures of the polym