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@ARTICLE{Zhao:281847,
author = {Zhao, Yue and Yoshimura, Kimio and Shishitani, Hideyuki and
Yamaguchi, Susumu and Tanaka, Hirohisa and Koizumi, Satoshi
and Szekely, Noemi and Radulescu, Aurel and Richter, Dieter
and Maekawa, Yasunari},
title = {{I}midazolium-based anion exchange membranes for alkaline
anion fuel cells: elucidation of the morphology and the
interplay between the morphology and properties},
journal = {Soft matter},
volume = {12},
number = {5},
issn = {1744-6848},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2016-01514},
pages = {1567 - 1578},
year = {2016},
abstract = {We investigated the morphology and swelling behavior of a
new graft-type of anion exchange membrane (AEM) containing
2-methylimidazolium groups by using a contrast variation
small angle neutron scattering (SANS) technique. These AEMs
were prepared by radiation-induced grafting of
2-methyl-1-vinylimidazole and styrene into
poly(ethylene-co-tetrafluoroethylene) (ETFE) films and
subsequent N-alkylation with methyliodide, and possessed
both high alkaline durability and high conductivity. Our
results showed that the crystalline lamellar and crystallite
structures originating from the pristine ETFE films were
more or less conserved in these AEMs, but the lamellar
d-spacing in both dry and wet membranes was enlarged,
indicating an expansion of the amorphous lamellae due to the
graft chains introduced in the grafting process and the
water incorporated in the swelling process. For the first
time, the swelling behavior of the AEMs was studied
quantitatively in various water mixtures of water and
deuterated water with different volume ratios (contrast
variation method), and the morphology of these membranes was
elucidated by three phases: phase (1) crystalline ETFE
domains, which offer good mechanical properties; phase (2)
hydrophobic amorphous domains, which are made up of
amorphous ETFE chains and offer a matrix to create
conducting regions; phase (3) interconnected hydrated
domains, which are composed of the entire graft chains and
water and play a key role in promoting the conductivity.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000369749500024},
doi = {10.1039/C5SM02724A},
url = {https://juser.fz-juelich.de/record/281847},
}