{"title":"用于阴离子交换膜水电解的乙烯基原位交联聚苯并咪唑","authors":"Maolian Guo, Zihui Wang, Yifei Xu, Xiuling Zhu","doi":"10.1016/j.memsci.2024.123026","DOIUrl":null,"url":null,"abstract":"<div><p>In the present work, a series of crosslinked polybenzimidazole (PBI) anion exchange membranes (AEMs) were prepared via the vinyl-based in-situ crosslinking method. The crosslinked AEMs (PcPBI-<em>x</em>-C) had simultaneously improved dimensional stability, mechanical properties and chemical stability compared to the pre-crosslinked AEM (PcPBI). The effect of different crosslinker structures including rigid benzene ring, flexible alkanes and flexible alkanes containing hydrophilic imidazolium on the performance of AEMs was systematically investigated. As results, the swelling ratio of the PcPBI-Vbc-C membrane containing rigid benzene ring crosslinked structure was reduced by 49.8 % (from 22.1 % to 11.1 %), the tensile strength of PcPBI-Im-C membrane containing flexible hydrophilic imidazolium crosslinked structure increased by 33.5 % (from 48.1 MPa to 64.2 MPa) and the elongation at break by 115.2 % (from 28.9 % to 62.2 %). PcPBI-<em>x</em>-C crosslinked AEMs had conductivities of 87.6–98.7 mS/cm at 80 °C, their conductivity retentions were 72.5–82.4 % after immersion in 2 M KOH solution for 2400 h. Furthermore, the anion exchange membrane water electrolysis (AEMWE) with PcPBI-Im-C as AEM could be stably operated for 100 h at the current density of 200 mA/cm<sup>2</sup>, indicating that PBI AEMs containing flexible hydrophilic imidazolium crosslinked structure possess great potential for application in AEMWE.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":null,"pages":null},"PeriodicalIF":8.4000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Vinyl-based in-situ crosslinked polybenzimidazoles for anion exchange membranes water electrolysis\",\"authors\":\"Maolian Guo, Zihui Wang, Yifei Xu, Xiuling Zhu\",\"doi\":\"10.1016/j.memsci.2024.123026\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the present work, a series of crosslinked polybenzimidazole (PBI) anion exchange membranes (AEMs) were prepared via the vinyl-based in-situ crosslinking method. The crosslinked AEMs (PcPBI-<em>x</em>-C) had simultaneously improved dimensional stability, mechanical properties and chemical stability compared to the pre-crosslinked AEM (PcPBI). The effect of different crosslinker structures including rigid benzene ring, flexible alkanes and flexible alkanes containing hydrophilic imidazolium on the performance of AEMs was systematically investigated. As results, the swelling ratio of the PcPBI-Vbc-C membrane containing rigid benzene ring crosslinked structure was reduced by 49.8 % (from 22.1 % to 11.1 %), the tensile strength of PcPBI-Im-C membrane containing flexible hydrophilic imidazolium crosslinked structure increased by 33.5 % (from 48.1 MPa to 64.2 MPa) and the elongation at break by 115.2 % (from 28.9 % to 62.2 %). PcPBI-<em>x</em>-C crosslinked AEMs had conductivities of 87.6–98.7 mS/cm at 80 °C, their conductivity retentions were 72.5–82.4 % after immersion in 2 M KOH solution for 2400 h. Furthermore, the anion exchange membrane water electrolysis (AEMWE) with PcPBI-Im-C as AEM could be stably operated for 100 h at the current density of 200 mA/cm<sup>2</sup>, indicating that PBI AEMs containing flexible hydrophilic imidazolium crosslinked structure possess great potential for application in AEMWE.</p></div>\",\"PeriodicalId\":368,\"journal\":{\"name\":\"Journal of Membrane Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.4000,\"publicationDate\":\"2024-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Membrane Science\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0376738824006203\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Membrane Science","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0376738824006203","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Vinyl-based in-situ crosslinked polybenzimidazoles for anion exchange membranes water electrolysis
In the present work, a series of crosslinked polybenzimidazole (PBI) anion exchange membranes (AEMs) were prepared via the vinyl-based in-situ crosslinking method. The crosslinked AEMs (PcPBI-x-C) had simultaneously improved dimensional stability, mechanical properties and chemical stability compared to the pre-crosslinked AEM (PcPBI). The effect of different crosslinker structures including rigid benzene ring, flexible alkanes and flexible alkanes containing hydrophilic imidazolium on the performance of AEMs was systematically investigated. As results, the swelling ratio of the PcPBI-Vbc-C membrane containing rigid benzene ring crosslinked structure was reduced by 49.8 % (from 22.1 % to 11.1 %), the tensile strength of PcPBI-Im-C membrane containing flexible hydrophilic imidazolium crosslinked structure increased by 33.5 % (from 48.1 MPa to 64.2 MPa) and the elongation at break by 115.2 % (from 28.9 % to 62.2 %). PcPBI-x-C crosslinked AEMs had conductivities of 87.6–98.7 mS/cm at 80 °C, their conductivity retentions were 72.5–82.4 % after immersion in 2 M KOH solution for 2400 h. Furthermore, the anion exchange membrane water electrolysis (AEMWE) with PcPBI-Im-C as AEM could be stably operated for 100 h at the current density of 200 mA/cm2, indicating that PBI AEMs containing flexible hydrophilic imidazolium crosslinked structure possess great potential for application in AEMWE.
期刊介绍:
The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.