School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510641, China
Xiu-hua Li (李秀华), E-mail: lixiuhua@scut.edu.cn
收稿:2016-12-16,
修回:2017-2-7,
录用:2017-2-8,
纸质出版:2017-07-05
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Guang-hui Nie, Wen-jun Wu, Xi Yue, 等. Synthesis and Properties of Hydroxide Conductive Polymers Carrying Dense Aromatic Side-chain Quaternary Ammonium Groups[J]. Chinese Journal of Polymer Science, 2017,35(7):823-836.
Guang-hui Nie, Wen-jun Wu, Xi Yue, et al. Synthesis and Properties of Hydroxide Conductive Polymers Carrying Dense Aromatic Side-chain Quaternary Ammonium Groups[J]. Chinese Journal of Polymer Science, 2017, 35(7): 823-836.
Guang-hui Nie, Wen-jun Wu, Xi Yue, 等. Synthesis and Properties of Hydroxide Conductive Polymers Carrying Dense Aromatic Side-chain Quaternary Ammonium Groups[J]. Chinese Journal of Polymer Science, 2017,35(7):823-836. DOI: 10.1007/s10118-017-1941-6.
Guang-hui Nie, Wen-jun Wu, Xi Yue, et al. Synthesis and Properties of Hydroxide Conductive Polymers Carrying Dense Aromatic Side-chain Quaternary Ammonium Groups[J]. Chinese Journal of Polymer Science, 2017, 35(7): 823-836. DOI: 10.1007/s10118-017-1941-6.
A series of hydroxide conductive polymers QTBMs carrying dense aromatic side-chain quaternary ammonium groups has been synthesized by using a new monomer of 3
3'-di(3"
5"-dimethylphenyl)-4
4'-difluorodiphenyl sulfone and other commercial monomers
via
polycondensation reaction
and subsequent bromination
quaternization and alkalization. The chemical structures of the ionomers were confirmed by
1
H-and
13
C-NMR spectroscopy. Water uptake
swelling ratio
hydroxide conductivity
the number of bonded water per ammonium group (
λ
)
volumetric ion exchange capacity (IEC
Vwet
)
mechanical and thermal properties
and chemical stability were systematically evaluated for the series of QTBMs membranes. QTBMs showed IECs ranging from 1.02 meq·g
-1
to 2.11 meq·g
-1
; in particular
QTBM-60 membrane with the highest IEC (2.11 meq·g
-1
) had very high hydroxide ion conductivity of 131.9 mS·cm
-1
at 80℃
which was attributed to the well assembled nano-channels with distinct phase separation evidenced by small-angle X-ray scattering (SAXS). It was found that the hydrated QTBMs membranes were mechanically stable with moderate water uptakes and swelling ratios
high chemical stability under the harsh alkaline conditions. This work provides a facile way to prepare anion exchange membranes (AEMs) with high performances for the application in alkaline fuel cells.
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