Herein, thin film nanocomposite (TFN) membranes were prepared with excellent chemical stability and separation performance for organic solvent nanofiltration (OSN) applications. The support membrane was synthesized via a new approach, in which a blend of two immiscible polymers, i.e. high density polyethylene (HDPE)-polystyrene (PS), which were compatibilized with styrene-ethylene-butylene-styrene (SEBS), was prepared through mixing by a Brabender, followed by fabricating blend sheets through a hot press machine. The PE support was then prepared by extracting the PS/compatibilizer phase from the blend sheet. The hydrophilicity of the PE support membrane was considerably enhanced with a polydopamine (PDA) layer. Different nanoparticles including nanoflower (NF) ZnO, nanosphere (NS) ZnO, MoS Quantum dots-nanoflower ZnO nanocomposite (QDs@NF ZnO), and MoS Quantum dots-nanosphere ZnO nanocomposite (QDs@NS ZnO) were incorporated into the polyamide (PA) active layer of the membranes to enhance the performance of the TFN membranes. The separation performance of the TFN membranes was investigated for rejecting different dyes dissolved in methanol. Our results demonstrate outstanding separation performance, with a dye rejection of 99.6 %, 99.6 %, 99.8 %, and 99.9 % for methylene blue, crystal violet, rhodamine B, and methyl green, respectively. Additionally, the TFN membranes incorporated with QDs@NF ZnO nanoparticles showed great solvent resistance, with a methanol permeance up to 6.7 L/m.h.bar after activation with dimethylformamide.

中文翻译：

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由新型PE支撑层、聚多巴胺夹层和掺杂MoS2量子点@ZnO纳米复合材料掺入聚酰胺活性层制备的高性能TFN膜


本文制备的薄膜纳米复合材料（TFN）膜具有优异的化学稳定性和分离性能，适用于有机溶剂纳滤（OSN）应用。该支撑膜是通过一种新方法合成的，其中两种不混溶聚合物的共混物，即高密度聚乙烯（HDPE）-聚苯乙烯（PS），与苯乙烯-乙烯-丁烯-苯乙烯（SEBS）相容，通过以下方法制备通过布拉本德混合，然后通过热压机制造共混片材。然后通过从共混片材中提取 PS/增容剂相来制备 PE 载体。聚多巴胺 (PDA) 层显着增强了 PE 支撑膜的亲水性。将纳米花（NF）ZnO、纳米球（NS）ZnO、MoS2量子点-纳米花ZnO纳米复合材料（QDs@NF ZnO）和MoS2量子点-纳米球ZnO纳米复合材料（QDs@NS ZnO）等不同纳米粒子掺入聚酰胺（PA）中。 ）膜的活性层以增强TFN膜的性能。研究了 TFN 膜的分离性能，以去除溶解在甲醇中的不同染料。我们的结果证明了出色的分离性能，对亚甲基蓝、结晶紫、罗丹明 B 和甲基绿的染料截留率分别为 99.6 %、99.6 %、99.8 % 和 99.9 %。此外，掺入QDs@NF ZnO纳米颗粒的TFN膜表现出良好的耐溶剂性，用二甲基甲酰胺活化后，甲醇渗透率高达6.7 L/mhbar。