Abstract In this work, UiO-66-NH2 nanoparticles, a type of metal-organic frameworks (MOFs) with an average size of ~100 nm, were incorporated into the polyamide-based thin-film nanocomposite (TFN) RO membranes. Their inherent porous structure, suitable triangular aperture size, hydrophilic nature, and high chemical and water stability endow the TFN membranes with greater surface hydrophilicity, lower degree of cross-linking and preferential pathways for water molecules across the selective layers. Herein, we introduce UiO-66-NH2 nanoparticles in the TFN layer via spray assisted pre-disposition. The UiO-66-NH2 TFN membranes with a spray duration of 3 min show a ~50% increase in pure water permeance while maintaining a similar rejection compared with the thin-film composite (TFC) membranes in brackish water desalination tests. The former also displays higher chlorine resistance than the latter. In the stimulated seawater desalination tests, TFN membranes also exhibit a higher water flux and salt rejection than the benchmark membranes.

中文翻译：

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含有 UiO-66-NH2 纳米颗粒的薄膜纳米复合膜用于微咸水和海水淡化

摘要 在这项工作中，UiO-66-NH2 纳米粒子，一种平均尺寸约为 100 nm 的金属有机骨架 (MOF)，被结合到聚酰胺基薄膜纳米复合材料 (TFN) RO 膜中。它们固有的多孔结构、合适的三角形孔径尺寸、亲水性以及高化学和水稳定性赋予 TFN 膜更大的表面亲水性、更低的交联度和水分子穿过选择性层的优先途径。在此，我们通过喷雾辅助预置在 TFN 层中引入了 UiO-66-NH2 纳米颗粒。在微咸水淡化测试中，与薄膜复合 (TFC) 膜相比，UiO-66-NH2 TFN 膜的喷雾持续时间为 3 分钟，纯水渗透率提高了约 50%，同时保持了类似的截留率。前者也表现出比后者更高的耐氯性。在受激海水淡化测试中，TFN 膜还表现出比基准膜更高的水通量和脱盐率。