Multi-cation side-chain-type containing piperidinium group poly(2,6-dimethyl-1,4-phenylene oxide) alkaline anion exchange membranes
Multi-cation side-chain-type containing piperidinium group poly(2,6-dimethyl-1,4-phenylene oxide) alkaline anion exchange membranes
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多阳离子侧链型含哌啶基聚(2,6-二甲基-1,4-苯醚)碱性阴离子交换膜
DOI：
10.1002/app.50736
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发表时间：
2021
影响因子：
3
通讯作者：
Shanjun Gao
中科院分区：
文献类型：
--
作者：
Mingliang Zhang;Lin Zhang;Zhihui Wu;Ao Ding;Chunhui Shen;Shanjun Gao
A series of alkaline anion exchange membranes (AAEMs) based on poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) with multi-cation side chain containing piperidinium group were fabricated via nucleophilic substitution and Menshutkin reaction. The chemical structures of the AAEMs (PPO-AMP-X) were determined by Fourier transform infrared and proton nuclear magnetic resonance spectra. The resultant PPO-AMP-X membranes with the ion exchange capacities (IECs) of 2.05-2.77 mmol g(-1) displayed the hydroxide conductivities in the range of 61.04-78.92 mS cm(-1) at 80 degrees C. When tested at the same degree of functionalization levels, the PPO-AMP-X membranes exhibited significantly higher hydroxide conductivity and lower conductivity loss than conventional AAEMs bearing benzyltri-methylammonium group (PPO-TMA). The PPO-AMP-28 multi-cation membrane showed a hydroxide conductivity of 70.52 mS cm(-1) at 80 degrees C, which was nearly two times higher than that of the PPO-TMA-28 single-cation membrane (36.74 mS cm(-1)). Compared with PPO-TMA-28 (56.76% decrease), the hydroxide conductivity of PPO-AMP-28 merely decreased by 23.15% after soaked in 1 M KOH at 80 degrees C for 500 h. Additionally, the PPO-AMP-X membranes displayed moderate mechanical properties and good thermal stabilities, which can meet the basic requirements for use in fuel cells. This study provides a facile method for preparing AAEMs with multi-cation side chain containing piperidinium group.
