Comb-shaped fluorene-based poly(arylene ether sulfone nitrile) as anion exchange membrane |
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| Affiliation: | 1. School of Materials Science and Engineering, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China;2. School of Civil Engineering and Architecture, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China;3. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;1. College of Chemical Engineering, Changchun University of Technology, PR China;2. School of Materials Science and Engineering, Changchun University of Technology, PR China;3. Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, PR China |
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| Abstract: | A series of comb-shaped fluorene-based poly (arylene ether sulfone nitrile) (CFPESN–x) was synthesized as anion exchange membranes (AEMs). The well-designed architecture of fluorene-based main chains and comb-shaped C8 long alkyl side chains containing quaternary ammonium groups was responsible for the clear microphase-separated morphologies, as confirmed by small angle X-ray scattering and atomic force microscopy. Moreover, nitrile groups on main chains also showed a profound influence on membrane morphology and properties. CFPESN–x exhibited more interconnected ionic domains with increasing the nitrile group content resulting in higher conductivities and anti-swelling property. Then CFPESN–x exhibited high ionic conductivities in the range of 27.1–91.5 mS cm?1 from 30 to 80 °C and superior ratios of conductivity to swelling ratio at 80 °C at moderate IECs. Moreover, CFPESN–x also showed good mechanical properties and thermal stability, and optimizable alkaline stability and single cell performance. |
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| Keywords: | Fluorene groups Comb-shaped Poly(arylene ether sulfone nitrile) Anion exchange membranes Microphase separation |
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