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Citation: Rong Chen, Ang Li, Shi-chao Fang, Hui-ping Bi, Zhao-xia Hu, Shou-wen Chen. Preparation and Properties of Anion Exchange Membranes Based on Self-crosslinked Quaternary Ammonium Poly(ether sulfone)s[J]. Acta Polymerica Sinica, ;2016, (4): 436-442. doi: 10.11777/j.issn1000-3304.2016.15225 shu

Preparation and Properties of Anion Exchange Membranes Based on Self-crosslinked Quaternary Ammonium Poly(ether sulfone)s

Received Date: 17 August 2015
Revised Date: 27 October 2015

In order to improve the ion conductivity and alkaline stability of the anion exchange membranes derived from quaternary ammonium poly(ether sulfone)s, a series of new self-crosslinked membranes (CQPES) were successfully prepared from three kinds of aliphatic di-tertiary amines, namely, N,N,N',N'-tetramethylethylenediamine (TMEDA), N,N,N',N'-tetramethyl-1, 3-propanediamine (TMPDA) and N,N,N',N'-tetramethyl-1, 6-hexanediamine (TMHDA), by solution casting.For the CQPES membranes, their properties such as solvent resistance, dimensional stability, mechanical stability, hydrolytic stability as well as alkaline stability were enhanced significantly, while the high ion conductivity was maintained.For example, the membrane of CQPES-H-0.5 (1.45 mmol/g, TMHDA as the cross-linker) showed 43% of water uptake, lower than 10% of size change in in-plane direction at 30℃, and 17 mS/cm and 64 mS/cm of ionic conductivity in water at 30℃ and 90℃, respectively.During the evaluation of stability, 21% loss in ionic conductivity after treatment in 4 mol/L NaOH solution for 168 h and 3.8% loss in weight after treatment in 100℃ water for 24 h were found for CQPES-H-0.5 membrane, while 12% and 40% losses were for the uncrosslinked membrane (QPES), respectively.The excellent performance of CQPES-H-0.5 suggests its potential application in the fuel cell system.
- Fuel cell,
- Anion exchange membrane,
- Quaternary ammonium poly(ether sulfone)s,
- Self-crosslink,
- Di-tertiary amine
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