期刊
POLYMERS
卷 12, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/polym12123011
关键词
anion exchange membrane; hyperbranched polymer; alkaline fuel cell; blended membranes; anion conductivity; dimensional stability
资金
- Jeonbuk National University, Republic of Korea in 2020
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20184030202210]
- Medical Research Center Program through the National Research Foundation (NRF) - Korean government (MSIP) [NRF-2017R1A5A2015061]
A series of novel blended anion exchange membranes (AEMs) were prepared with hyperbranched brominated poly(arylene ether sulfone) (Br-HB-PAES) and linear chloromethylated poly(phenylene oxide) (CM-PPO). The as-prepared blended membranes were fabricated with different weight ratios of Br-HB-PAES to CM-PPO, and the quaternization reaction for introducing the ionic functional group was performed by triethylamine. The Q-PAES/PPO-XY (quaternized-PAES/PPO-XY) blended membranes promoted the ion channel formation as the strong hydrogen bonds interconnecting the two polymers were maintained, and showed an improved hydroxide conductivity with excellent thermal behavior. In particular, the Q-PAES/PPO-55 membrane showed a very high hydroxide ion conductivity (90.9 mS cm(-1)) compared to the pristine Q-HB-PAES membrane (32.8 mS cm(-1)), a result supported by the morphology of the membrane as determined by the AFM analysis. In addition, the rigid hyperbranched structure showed a suppressed swelling ratio of 17.9-24.9% despite an excessive water uptake of 33.2-50.3% at 90 degrees C, and demonstrated a remarkable alkaline stability under 2.0 M KOH conditions over 1000 h.
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