Interlayered thin-film nanocomposite (TFN) membranes have shown the potential to boost nanofiltration performance for water treatment applications including the removal of organic micropollutants (OMPs). However, the effects of substrates have been overlooked when exploiting and evaluating the efficacy of certain kinds of interlayers in tailoring membrane performance. Herein, a series of TFN membranes were synthesized on different porous substrates with identical interlayers of metal-organic framework nanosheets. It was revealed that the interlayer introduction could narrow but not fully eliminate the difference in the properties among the polyamide layers formed on different substrates, and the membrane performance variation was prominent in distinct aspects. For substrates with small pore sizes exerting severe water transport hindrance, the introduced interlayer mainly enhanced membrane water permeance by affording the gutter effect, while it could be more effective in reducing membrane pore size by improving the interfacial polymerization platform and avoiding PA defects when using a large-pore-size substrate. By matching the selected substrates and interlayers well, superior TFN membranes were obtained with simultaneously higher water permeance and OMP rejections compared to three commercial membranes. This study helps us to objectively understand interlayer efficacies and attain performance breakthroughs of TFN membranes for more efficient water treatment.

中文翻译：

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中间层在定制聚酰胺纳滤膜去除有机微污染物性能方面的独特功效：取决于基材特性


层间薄膜纳米复合材料 (TFN) 膜已显示出提高水处理应用纳滤性能的潜力，包括去除有机微污染物 (OMP)。然而，在开发和评估某些类型的中间层在定制膜性能方面的功效时，基材的影响被忽视了。在此，在不同的多孔基底上合成了一系列具有相同金属有机框架纳米片夹层的 TFN 膜。结果表明，夹层引入可以缩小但不能完全消除不同基材上形成的聚酰胺层之间的性能差异，并且膜性能差异在不同方面很突出。对于小孔径的水传输阻碍严重的基材，引入的中间层主要通过提供沟槽效应来增强膜的透水性，同时通过改善界面聚合平台和避免使用PA缺陷时可以更有效地减小膜孔径。大孔径基材。通过很好地匹配所选基材和夹层，获得了优异的 TFN 膜，与三种商用膜相比，同时具有更高的水渗透性和 OMP 截留率。这项研究有助于我们客观地了解层间效率并实现 TFN 膜的性能突破，以实现更高效的水处理。