超支化聚合物包裹 UIO-66-NH2 作为共价中间层，增强聚酰胺膜的 Li+/Mg2+ 分离能力和酸碱稳定性

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2024-10-15 DOI:10.1016/j.desal.2024.118212

Bingbing Yuan , Shuang Yuan , Chaozheng Jia , Ping Hu , Siheng Zhao , Yuling Ren , Meng You , Shengchao Zhao , Kuo Chen , Xiaozhuan Zhang , Dongxiao Yang , Juhui Jiang , Xiangdong Lou , Q. Jason Niu

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引用次数: 0

摘要

本文设计并通过 3,5-二氨基苯甲酸的原位自缩合聚合合成了超支化聚酰胺共价包覆 UIO-66-NH2 纳米粒子（PA-UIO-66-NH2）。在重氮化-偶联反应中掺入混合基质中间层，从而制备出混合基质中间层，以调整聚砜（PSF）支架的孔径和亲水性。在改性 PSF 支撑物上形成的界面聚合聚酰胺（PA）纳米薄膜在分离 Li+/Mg2+ 时表现出优化的尺寸排除和唐南效应。实验数据显示，使用这种中间层调谐的 PA/m-PSF-2 膜的 Li+/Mg2+ 分离因子（Mg2+/Li+比率为 15.3 时为 32.24）达到了受控 PA/PSF-0 的 13.27 倍，超过了一些商用 PA（NF 270、DL 和 DK）和文献报道的膜。此外，与 PA/PSF-0 膜相比，相关的氯化锂/水通量从 1.39 倍提高到 1.88 倍，达到 244.25 kg m-2 h-1。这种混合基质中间层可以吸附和隔离酸性或碱性清洗液，在实际应用中大大降低了清洗液对 PA 纳米膜的排斥率和水通量的影响。这项研究表明，混合基质共价中间层是构建结构精细、坚固耐用的 PA 纳滤（NF）复合膜的有效方法。

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Hyperbranched polymer wrapped UIO-66-NH2 as covalent intermediate layer to enhance polyamide membrane for Li+/Mg2+ separation and acid/alkaline stability

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Hyperbranched polymer wrapped UIO-66-NH2 as covalent intermediate layer to enhance polyamide membrane for Li+/Mg2+ separation and acid/alkaline stability

Herein, hyperbranched polyamide covalently wrapped UIO-66-NH₂ nanoparticles (PA-UIO-66-NH₂) were designed and synthesized via the in-situ self-condensation polymerization of 3,5-diaminobenzoic acid. Mixed matrix intermediate layer thus was prepared by doping it into the diazotization-coupling reaction, to tune the pore size and hydrophilic of the polysulfone (PSF) support. The interfacial polymerized polyamide (PA) nanofilm formed on modified PSF support exhibited optimized improved size exclusion and Donnan effect on separation of Li⁺/Mg²⁺. Experimental data showed that the Li⁺/Mg²⁺ separation factor (32.24 at Mg²⁺/Li⁺ ratio of 15.3) of the PA/m-PSF-2 membrane tuned with such intermediate layer reached 13.27 times that of the controlled PA/PSF-0, and surpassed some commercial PA (NF 270, DL, and DK) and literature reported membranes. Moreover, the related LiCl/water flux enhanced from 1.39 to 1.88 times compared with that of the PA/PSF-0 membrane, up to 244.25 kg m⁻² h⁻¹. Such mixed matrix intermediate layer can adsorb and isolate acidic or alkaline cleaning solutions, significantly reducing the impact of cleaning solutions on the rejection rate and water flux of the PA nanofilm during actual application. This work demonstrated that the mixed matrix covalent intermediate layer was an effective approach to construct the fine-tuned structural and robust PA nanofiltration (NF) composite membrane.

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来源期刊

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.