用于电渗析的基于卡尔多聚苯并咪唑的超高硝酸盐选择性金属聚合物膜

IF 8.4 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science Pub Date : 2024-11-17 DOI:10.1016/j.memsci.2024.123518

A.A. Lysova , A.D. Manin , D.V. Golubenko , I.I. Ponomarev , V.A. Altynov , N. Hilal , A.B. Yaroslavtsev

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引用次数: 0

摘要

具有高一价离子选择性的离子交换膜对于从天然水和废水中提取有价值的成分至关重要。制造离子交换膜的方法之一是制造具有离子传导通道的纳米结构材料。在这项研究中，首次获得了基于含有 Zn2+、Cr3+ 和 Cu2+ 离子的 Cardo 聚苯并咪唑（PBI-O-PhT）材料，并将其用于电渗析分离。结果表明，金属-苯并咪唑配位键形成了交联结构。所获得的金属聚合物膜的离子电导率与商用膜相当，达到 0.32 mS cm-1，硝酸根离子迁移率也很高（99.2%）。研究表明，所获得的膜在阴离子分离方面具有极高的选择性系数。含铜膜 PBI/Cu-50 的选择性系数最高且最稳定，分别为 P(NO3/SO4) = 729、P(Cl/SO4) = 109 和 P(NO3/Cl) = 6.66。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Ultra-high nitrate-selective metal-polymer membranes based on cardo polybenzimidazole for electrodialysis

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Ultra-high nitrate-selective metal-polymer membranes based on cardo polybenzimidazole for electrodialysis

Ion exchange membranes with high monovalent ion selectivity are essential for extracting valuable components from natural and waste waters. One of the approaches to their fabrication is the creation of nanostructured materials with ion-conducting channels. In this study, materials based on cardo polybenzimidazole (PBI–O-PhT) containing Zn²⁺, Cr³⁺ and Cu²⁺ ions were obtained and used for the first time for electrodialysis separation. The formation of crosslinked structure due to metal-benzimidazole coordination bonds was demonstrated. The obtained metal-polymer membranes have ionic conductivity comparable to commercial ones, reaching 0.32 mS cm⁻¹, and high values of nitrate ion transport numbers (99.2 %). It is shown that the obtained membranes achieve incredibly high values of selectivity coefficients for anion separation. The highest and most stable values were obtained for the copper-containing membrane PBI/Cu-50, which are P(NO₃/SO₄) = 729, P(Cl/SO₄) = 109 and P(NO₃/Cl) = 6.66.

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来源期刊

Journal of Membrane Science 工程技术-高分子科学

CiteScore

17.10

自引率

17.90%

发文量

1031

审稿时长

2.5 months

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.