Quan Jin , Yanzhen Ren , Lingling Ma , Anran Zhang , Min Yang , Shoutao Gong , Xinli Zhang , Gaohong He , Fengxiang Zhang
{"title":"用于电渗析的环糊精-烷基二胺轮烷交联阴离子交换膜","authors":"Quan Jin , Yanzhen Ren , Lingling Ma , Anran Zhang , Min Yang , Shoutao Gong , Xinli Zhang , Gaohong He , Fengxiang Zhang","doi":"10.1016/j.memsci.2024.122933","DOIUrl":null,"url":null,"abstract":"<div><p>Anion exchange membranes (AEMs) with high selective conductivity and low surface resistance are important for the development of electrodialysis desalination industry. In this work, we design and synthesize a rotaxane of β-cyclodextrin (CD)-alkyldiamine inclusion complex (CDIC) via a host-guest molecular recognition mechanism; the resulting CDIC rotaxane is employed for cross-linking chloromethylated, hydroxy quaternized polysulfone (HQPSf) to make AEMs. β-CD is inherently hydrophilic and its –OH on the outer surface can hydrogen-bond with HQPSf to promote ionic cluster aggregation, leading to enhanced microphase-separated morphology and improved conductivity; the rotaxane-cross-linked structure guarantees good ductility and ion selectivity of the membrane. Therefore, the optimized HQPSf-CDIC membrane gives the most excellent current efficiency discharge current efficiency (92.04 %), the lowest energy consumption (4.68 kWh kg<sup>−1</sup>), and the maximum Cl<sup>−</sup> mobility (75.38 mg m<sup>−2</sup> s<sup>−1</sup>) in the electrodialysis tests, significantly better than the un-crosslinked HQPSf membrane (86.41 %, 5.17 kWh kg<sup>−1</sup> and 71.29 mg m<sup>−2</sup> s<sup>−1</sup>). Our work demonstrates that introducing CDIC rotaxane cross-linked structure can help to enhance microphase separation and improve the performance of AEMs for electrodialysis.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":null,"pages":null},"PeriodicalIF":8.4000,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Cyclodextrin-alkyldiamine rotaxane cross-linked anion exchange membranes for electrodialysis\",\"authors\":\"Quan Jin , Yanzhen Ren , Lingling Ma , Anran Zhang , Min Yang , Shoutao Gong , Xinli Zhang , Gaohong He , Fengxiang Zhang\",\"doi\":\"10.1016/j.memsci.2024.122933\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Anion exchange membranes (AEMs) with high selective conductivity and low surface resistance are important for the development of electrodialysis desalination industry. In this work, we design and synthesize a rotaxane of β-cyclodextrin (CD)-alkyldiamine inclusion complex (CDIC) via a host-guest molecular recognition mechanism; the resulting CDIC rotaxane is employed for cross-linking chloromethylated, hydroxy quaternized polysulfone (HQPSf) to make AEMs. β-CD is inherently hydrophilic and its –OH on the outer surface can hydrogen-bond with HQPSf to promote ionic cluster aggregation, leading to enhanced microphase-separated morphology and improved conductivity; the rotaxane-cross-linked structure guarantees good ductility and ion selectivity of the membrane. Therefore, the optimized HQPSf-CDIC membrane gives the most excellent current efficiency discharge current efficiency (92.04 %), the lowest energy consumption (4.68 kWh kg<sup>−1</sup>), and the maximum Cl<sup>−</sup> mobility (75.38 mg m<sup>−2</sup> s<sup>−1</sup>) in the electrodialysis tests, significantly better than the un-crosslinked HQPSf membrane (86.41 %, 5.17 kWh kg<sup>−1</sup> and 71.29 mg m<sup>−2</sup> s<sup>−1</sup>). Our work demonstrates that introducing CDIC rotaxane cross-linked structure can help to enhance microphase separation and improve the performance of AEMs for electrodialysis.</p></div>\",\"PeriodicalId\":368,\"journal\":{\"name\":\"Journal of Membrane Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.4000,\"publicationDate\":\"2024-05-29\",\"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/S0376738824005271\",\"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/S0376738824005271","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}
Cyclodextrin-alkyldiamine rotaxane cross-linked anion exchange membranes for electrodialysis
Anion exchange membranes (AEMs) with high selective conductivity and low surface resistance are important for the development of electrodialysis desalination industry. In this work, we design and synthesize a rotaxane of β-cyclodextrin (CD)-alkyldiamine inclusion complex (CDIC) via a host-guest molecular recognition mechanism; the resulting CDIC rotaxane is employed for cross-linking chloromethylated, hydroxy quaternized polysulfone (HQPSf) to make AEMs. β-CD is inherently hydrophilic and its –OH on the outer surface can hydrogen-bond with HQPSf to promote ionic cluster aggregation, leading to enhanced microphase-separated morphology and improved conductivity; the rotaxane-cross-linked structure guarantees good ductility and ion selectivity of the membrane. Therefore, the optimized HQPSf-CDIC membrane gives the most excellent current efficiency discharge current efficiency (92.04 %), the lowest energy consumption (4.68 kWh kg−1), and the maximum Cl− mobility (75.38 mg m−2 s−1) in the electrodialysis tests, significantly better than the un-crosslinked HQPSf membrane (86.41 %, 5.17 kWh kg−1 and 71.29 mg m−2 s−1). Our work demonstrates that introducing CDIC rotaxane cross-linked structure can help to enhance microphase separation and improve the performance of AEMs for electrodialysis.
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.