Polyaryl piperidine anion exchange membranes with hydrophilic side chain |
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| Affiliation: | 1. College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, China;2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China;3. Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi''an University of Technology, Xi''an, 710048, China;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, People’s Republic of China;2. Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin 300350, People’s Republic of China;3. Tianjin Mainland Hydrogen Equipment Co., Ltd, Tianjin 301609, People’s Republic of China;4. National Industry-Education Integration Platform of Energy Storage, Tianjin University, Tianjin 300350, People’s Republic of China;1. State Key Laboratory of Chemical Resource Engineering, Institute of Modern Catalysis, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, PR China;2. Beijing Open University, Beijing, 100081, PR China |
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| Abstract: | Recently, the development of high-performance and durable anion exchange membranes has been a top priority for anion exchange membrane fuel cells. Here, a series of polyaryl piperidine anion exchange membranes with hydrophilic side chain (qBPBA-80-OQ-x) are prepared by the superacid-catalyzed Friedel-Crafts reaction. AFM images show that the hydrophilic side chain and hydrophobic main chain form a distinct microphase separation structure. The AEMs of qBPBA-80-OQ-100 and qBPBA-80 have close mechanical strength, but the ionic conductivity of the former (81 mS/cm, 80 °C) is higher than the latter (73 mS/cm, 80 °C). In addition, qBPBA-80-OQ-100 AEM loses by 15.0% after an alkaline treatment of 720 h, while qBPBA-80 AEM loses by 17.8%. The results indicate that the introduction of hydrophilic side chain not only promotes the formation of microphase separation structure, but also improves the ionic conductivity and alkaline resistance of polyaryl piperidine AEMs. |
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| Keywords: | Anion exchange membrane Polyaryl Piperidine cation Hydrophilic side chain Microphase separation |
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