收稿日期: 2022-04-06
网络出版日期: 2022-08-26
基金资助
广东省基础及应用基础研究基金资助项目(2021A1515010194);广东省大学生创新创业训练计划省级项目(S202010561204)
Preparation and Electrodialysis Desalination Behavior of DABCO-Me Series-Connected Di-cation AEMs
Received date: 2022-04-06
Online published: 2022-08-26
Supported by
Guangdong Basic and Applied Basic Research Foundation(2021A1515010194)
为探究甲基修饰1，4-二氮杂二环辛烷（DABCO）串联双离子离聚物官能度对阴离子交换膜（AEM）电渗析脱盐行为的影响，文中设计并制备了3种不同离子交换容量（IEC）的甲基修饰DABCO串联双离子离聚物AEM（QPPO-x），对所制备的膜的化学结构、热稳定性、机械性能、基础性能、电渗析脱盐性能进行了系统表征。结果表明：QPPO-x的化学结构符合研究设计；QPPO-x的热稳定性、机械性能、基础性能满足电渗析脱盐工艺的基本要求；该类膜的电渗析脱盐性能随着膜的IEC的增高有提高的趋势；拥有最高IEC的QPPO-0.20膜的脱盐效率达86.79%，盐通量达81.39 mg/（m2·s），脱盐能量损耗为2.35 kW·h/kg，其各项电渗析性能均优于商业膜AMX，在电渗析脱盐领域具有很好的应用前景。
关键词： 电渗析脱盐; 阴离子交换膜; 1; 4-二氮杂二环辛烷串联双离子; 聚苯醚
李秀华, 陈雅雯, 邹子龙, 等 . DABCO-Me串联双离子AEM的制备及电渗析脱盐行为分析[J]. 华南理工大学学报(自然科学版), 2023 , 51(3) : 53 -62 . DOI: 10.12141/j.issn.1000-565X.220184
In order to investigate the effect of functionality of methyl modified 1,4-diazabicyclo [2.2.2] octan-1,4-diaminium di-cation ionomer on its electrodialysis desalination behavior of the tailored anion exchange membranes (AEM), this paper designed and prepared a series of the series-connected di-cation ionomers with different ion exchange capacities (IEC) of methyl modified 1,4-diazabicyclo [2.2.2] octan-1,4-diaminium. The chemical structure, thermal stability, mechanical properties, basic properties and electrodialysis desalination properties of the prepared membranes were systematically characterized. The results show that the chemical structures of the ionomers fit the designing, and the thermal stability, mechanical properties and basic properties of the prepared membranes meet the requirements of electrodialysis desalination process. It is found that the electrodialysis desalination performance of the kind of membrane is improved with the increase of IEC. QPPO-0.20 membrane with the highest IEC has a desalination efficiency of 86.79%, salt flux of 81.39 mg/(m2·s) and energy consumption of 2.35 kW·h/kg. All of the electrodialysis parameters are better than those of the commercial membrane AMX. QPPO-0.20 is promising in the field of electrodialysis desalination.
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