用于高性能纳滤的具有单宁酸功能化 MXene 纳米片的薄膜纳米复合膜,ACS Applied Polymer Materials

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用于高性能纳滤的具有单宁酸功能化 MXene 纳米片的薄膜纳米复合膜
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2023-09-03 , DOI: 10.1021/acsapm.3c01296
Ye Sun ₁ , Wanying Yang ₁ , Lianchun Zou ₁ , Lixian Sun ₁ , Fan Yang ₁ , Hongbo Dang ₁ , Yanhua Yang ₁ , Dong Jiang ₁

Affiliation

纳滤是一种膜分离技术，可有效分离中性/带电溶质，且能耗很少。再利用或处理废水是保护环境的最有效方法之一。然而，当涉及浓差极化、膜污染和选择性渗透时，商业薄膜复合材料（TFC）纳滤膜表现出更严重的权衡效应。_{在这里，我们通过将单宁酸（TA）功能化的MXene（Ti 3} C ₂ TX ）纳米片分散到水相中并通过界面聚合将它们结合到聚酰胺表面层来_构建TFN膜。大量化学和结构研究表明，所生产的膜不仅具有多孔性、亲水性和带负电性，而且能够在分离层中构建传输通道，从而降低传质障碍。TA/MXene 比例和 MXene 纳米片浓度的变化可以微调 TMNF-TFN 膜特性。^{具体来说，结果表明，增强膜具有16.6 L m –2} h ^–1 bar ^–1的高水流量和对二价离子（MgSO ₄、Na ₂ SO ₄）的高截留率。TMNF-TFN 膜对于实际应用非常重要，还表现出出色的防污耐用性和长期稳定性。

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Thin Film Nanocomposite Membranes with Tannic Acid Functionalized MXene Nanosheets for High-Performance Nanofiltration

Nanofiltration is a membrane separation technology that efficiently separates neutral/charged solutes with little energy consumption. Reusing or treating wastewater is one of the most efficient ways to help the environment. When it comes to concentration polarization, membrane fouling, and selective permeation, however, commercial thin film composite (TFC) nanofiltration membranes exhibit more severe trade-off effects. Here, we build a TFN membrane by dispersing tannic acid (TA)-functionalized MXene (Ti₃C₂T_X) nanosheets into the aqueous phase and incorporating them into the polyamide surface layer by interfacial polymerization. The produced membrane has been shown by a number of chemical and structural investigations to be not only porous, hydrophilic, and negatively charged but also capable of constructing transport channels in the separating layer, hence lowering the barrier to mass transfer. Changes in TA/MXene ratio and MXene nanosheet concentration allowed for fine-tuning of TMNF-TFNs membrane characteristics. Specifically, the results show that the enhanced membrane has a high water flow of 16.6 L m^–2 h^–1 bar^–1 and a high rejection rate of divalent ions (MgSO₄, Na₂SO₄). Important for real-world applications, the TMNF-TFN membrane also displays outstanding antifouling durability and long stability.

更新日期：2023-09-03

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