Preparation of highly selective nanofiltration composite membranes based on a novel soluble rigidly contorted monomer

IF 2.8 3区化学 Q2 POLYMER SCIENCE

Journal of Applied Polymer Science Pub Date : 2024-01-17 DOI:10.1002/app.55141

Jing Zhou, Zhenyu Liu, Chi Jiang, Yingfei Hou

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Abstract

Nanofiltration composite membranes with high selectivity are one of the most critical cores in water treatment, and regulating the surface charge and pore structure of active separation layers in thin film composite membranes is one of the most effective means to improve the selectivity of composite membranes. This article synthesized a novel monomer with positive charge and a rigid twisted Tröger's base structure (named TBDA-SO₃), which was manipulated to improve the microporous structure and surface charge of the composite membrane. By interfacial polymerization, TBDA-SO₃, and piperazine were co-reacted with trimesoyl chloride to successfully prepare positively charged, highly selective, and strongly microporous polyamide composite nanofiltration membranes. The best-performing composite nanofiltration membrane in this article has a permeability similar to that of the control group's poly(piperazine amide) (PPA) membrane (pure water flux, 7.8 L m⁻² h⁻¹ bar⁻¹), but has excellent divalent cation selectivity (52.57), which is 4.4 times that of the control group's PPA membrane.

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基于新型可溶性刚性变形单体制备高选择性纳滤复合膜

具有高选择性的纳滤复合膜是水处理中最关键的核心之一，而调节薄膜复合膜中活性分离层的表面电荷和孔隙结构是提高复合膜选择性的最有效手段之一。本文合成了一种具有正电荷和刚性扭曲特氏基结构的新型单体（命名为 TBDA-SO3），并对其进行了处理，以改善复合膜的微孔结构和表面电荷。通过界面聚合，TBDA-SO3 和哌嗪与三甲基甲酰氯发生共反应，成功制备出带正电荷、高选择性和强微孔的聚酰胺复合纳米滤膜。本文中性能最好的复合纳滤膜的渗透性与对照组的聚（哌嗪酰胺）（PPA）膜（纯水通量，7.8 L m-2 h-1 bar-1）相似，但具有极佳的二价阳离子选择性（52.57），是对照组 PPA 膜的 4.4 倍。

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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来源期刊

Journal of Applied Polymer Science 化学-高分子科学

CiteScore

5.70

自引率

10.00%

发文量

1280

审稿时长

2.7 months

期刊介绍： The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.