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SPEEK/Polyimide Blends for Proton Conductive MembranesPresented at the 1st CARISMA Conference, Progress MEA 2008, La Grande Motte, 21st–24th September 2008.
Author(s) -
Maab H.,
Schieda M.,
Yave W.,
Shishatskiy S.,
Nunes S. P.
Publication year - 2009
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.200800121
Subject(s) - polyimide , membrane , materials science , methanol , casting , pervaporation , polymer chemistry , fourier transform infrared spectroscopy , ether , peek , chemical engineering , dielectric spectroscopy , composite material , chemistry , organic chemistry , electrochemistry , polymer , permeation , biochemistry , electrode , layer (electronics) , engineering
A series of membranes, based on sulphonated poly(ether ether ketone) (SPEEK)/polyimide (PI) blends, was prepared at different casting conditions. They were characterised by SEM, FTIR, DMTA, DSC, TGA, water/methanol pervaporation and impedance spectroscopy. The membranes prepared at 130 °C from blends with 10, 20 and 30 wt.‐% of PI are homogeneous, and the methanol permeabilities decreased from 28 × 10 –10 kg m s –1 m –2 (plain SPEEK) to 7.21, 2.61 and 0.55 × 10 –10 kg m s –1 m –2 , respectively. This corresponds to a 4‐ to 57‐fold methanol crossover reduction. With this improvement, by the introduction of PI, the power density of SPEEK‐based membranes in DMFC tests could be greatly improved.