用于纳滤的高通量聚酰胺薄膜复合膜,由具有增强微孔的特罗格基础图案组成

IF 4.1 2区 化学 Q2 POLYMER SCIENCE Polymer Pub Date : 2024-11-13 DOI:10.1016/j.polymer.2024.127813
Tae Hoon Lee , Jun Hyeok Kang , Min Gyu Shin , Jung-Hyun Lee , Hyo Won Kim , Ho Bum Park
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引用次数: 0

摘要

高通量和选择性膜是提高水净化纳滤工艺能效的关键组成部分。在此,我们报告了由用于纳滤的特罗格碱组成的高通量聚酰胺薄膜复合(TFC)膜。特罗格碱二胺(TBD)是作为界面聚合的水相单体合成的。利用热学、光谱和显微分析对基于 TBD 的聚酰胺进行了详细表征。值得注意的是,与传统聚酰胺化学(即 MPD-TMC)相比,TBD 基聚酰胺(命名为 TBD-TMC)的 V 形刚性特罗格基图案具有更高的微孔率和更大的孔径。因此,与 MPD-TMC 膜相比,TBD-TMC 膜的透水性提高了 570%,同时具有高达 91% 的中等盐排斥率,优于大多数已报道的纳滤膜。此外,TBD-TMC 膜还表现出很高的一价/二价离子选择性(NaCl/Na2SO4 分离可达 7.0),这可能是尺寸排斥和电荷排斥的共同作用的结果。这项工作凸显了特罗格基主题作为一种新型二元胺单体的潜力,可用于界面聚合膜以调整其微孔结构。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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High-flux polyamide thin-film composite membranes consisting of Tröger's base motif with enhanced microporosity for nanofiltration
High-flux and selective membranes are key components to improving the energy efficiency of nanofiltration processes for water purification. Herein, we report high-flux polyamide thin-film composite (TFC) membranes consisting of Tröger's base for nanofiltration. Tröger's base diamine (TBD) was synthesized as an aqueous phase monomer for interfacial polymerization. Detailed characterization of TBD-based polyamides was performed using thermal, spectroscopic, and microscopic analyses. Notably, the V-shaped and rigid Tröger's base motif rendered TBD-based polyamide (named TBD-TMC) features with enhanced microporosity as well as an enlarged pore size compared to conventional polyamide chemistry (i.e., MPD-TMC). As a result, the TBD-TMC membrane exhibited a 570 % improvement in water permeance compared to MPD-TMC membranes while exhibiting moderate salt rejection up to 91 %, outperforming most reported nanofiltration membranes. Also, the TBD-TMC membrane exhibited high monovalent/divalent ion selectivity (∼7.0 for NaCl/Na2SO4 separation), which may have resulted from the combined effects of size exclusion and charge repulsion. This work highlights the potential of Tröger's base motif as a new diamine monomer for interfacially polymerized membranes to tune their microporous structures.
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来源期刊
Polymer
Polymer 化学-高分子科学
CiteScore
7.90
自引率
8.70%
发文量
959
审稿时长
32 days
期刊介绍: Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.
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