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一种新型可交联侧链磺化聚芳醚砜共聚物质子交换膜的合成与表征

Synthesis and characterization of a novel crosslinkable side-chain sulfonated poly(arylene ether sulfone) copolymer proton exchange membranes.

作者信息

Wang Shouping, He Fugang, Weng Qiang, Yuan Diao, Chen Pei, Chen Xinbing, An Zhongwei

机构信息

Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University Xi'an 710119 PR China

出版信息

RSC Adv. 2020 Jun 30;10(42):24772-24783. doi: 10.1039/d0ra02987d. eCollection 2020 Jun 29.

DOI:10.1039/d0ra02987d
PMID:35517481
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9055182/
Abstract

A series of novel crosslinkable side-chain sulfonated poly(arylene ether sulfone) copolymers (S-SPAES(/)) was prepared from 4,4'-biphenol, 4,4'-difluorodiphenyl sulfone, and a new difluoro aromatic monomer 1-(2,6-difluorophenyl)-2-(3,5-dimethoxyphenyl)-1,2-ethanedione (DFDMED) co-polycondensation, demethylation, and further nucleophilic substitution of 1,4-butane sultone. Meanwhile, quinoxaline-based crosslinked copolymers (CS-SPAES(/)) were obtained cyclo-condensation between S-SPAES(/) and 3,3'-diaminobenzidine. Both the crosslinkable and crosslinked copolymer membranes exhibit good mechanical properties and high anisotropic membrane swelling. Crosslinkable S-SPAES(1/2) with an ion exchange capacity (IEC) of 2.01 mequiv. g displays a relatively high proton conductivity of 180 mS cm and acceptable single-cell performance, which is attributed to its good microphase separation resulting from the side-chain sulfonated copolymer structures. Compared with S-SPAES(1/1) (IEC of 1.68 mequiv. g), crosslinked CS-SPAES(1/2) with a comparable IEC exhibits a larger conductivity of 157 mS cm, and significantly higher oxidative stability and lower membrane swelling, suggesting a distinct performance improvement due to the quinoxaline-based crosslinking.

摘要

通过4,4'-双酚、4,4'-二氟二苯砜与新型二氟芳香单体1-(2,6-二氟苯基)-2-(3,5-二甲氧基苯基)-1,2-乙二酮(DFDMED)的共缩聚、脱甲基以及1,4-丁烷磺内酯的进一步亲核取代反应,制备了一系列新型可交联的侧链磺化聚(亚芳基醚砜)共聚物(S-SPAES(/))。同时,通过S-SPAES(/)与3,3'-二氨基联苯胺的环缩合反应得到了基于喹喔啉的交联共聚物(CS-SPAES(/))。可交联和交联共聚物膜均表现出良好的机械性能和高各向异性的膜溶胀性。离子交换容量(IEC)为2.01 mequiv. g的可交联S-SPAES(1/2)显示出相对较高的质子传导率180 mS cm以及可接受的单电池性能,这归因于其侧链磺化共聚物结构导致的良好微相分离。与IEC为1.68 mequiv. g的S-SPAES(1/1)相比,具有相当IEC的交联CS-SPAES(1/2)表现出更大的传导率157 mS cm,以及显著更高的氧化稳定性和更低的膜溶胀性,表明基于喹喔啉的交联使其性能有明显改善。

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Highly Proton Conducting Polyelectrolyte Membranes with Unusual Water Swelling Behavior Based on Triptycene-containing Poly(arylene ether sulfone) Multiblock Copolymers.基于含三茀的聚(芳基醚砜)多嵌段共聚物的具有异常水溶胀行为的高质子传导聚合物电解质膜。
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