In this work, a series of defective ZIF-8 (dZIF-8) nanoparticles with tuneable inner defects have been synthesized and successfully incorporated into the polyamide-based thin-film nanocomposite (TFN) membranes for brackish water and seawater desalination. This is the first attempt to use dZIF-8 nanoparticles as nanofillers in TFN membranes. Additional inner porosity of dZIF-8 nanoparticles endows the membranes with additional pathways for water molecules. Thus, the newly developed TFN membranes have higher separation performance for brackish water reverse osmosis (BWRO) desalination than the normal ZIF-8-incorporated TFN membranes. In addition, the influences of dZIF-8 loading on membrane properties and separation performance have been investigated. At a loading of 0.15 wt% dZIF-8 nanoparticles in the oil phase, the TFN membrane shows a water permeance of 2.61 L m^-2 h^-1 bar^-1 (LMH bar^-1) and a salt rejection of 98.6% for brackish water desalination at 20 bar. This water permeance is 52% higher than the pristine thin-film composite (TFC) membrane while the salt rejection is well maintained. Moreover, a steady water flux above 38 LMH is obtained when using seawater of 32000 ppm NaCl as the feed at 50 bar.

在这项工作中，合成了一系列具有可调内部缺陷的有缺陷的ZIF-8（dZIF-8）纳米颗粒，并将其成功地掺入了聚酰胺基薄膜纳米复合材料（TFN）膜中，用于咸水和海水淡化。这是将dZIF-8纳米颗粒用作TFN膜中的纳米填料的首次尝试。dZIF-8纳米颗粒的额外内部孔隙度使膜具有更多的水分子通道。因此，新开发的TFN膜比普通的ZIF-8掺入的TFN膜具有更高的分离能力，用于微咸水反渗透（BWRO）脱盐。此外，还研究了dZIF-8负载量对膜性能和分离性能的影响。在油相中负载0.15 wt％dZIF-8纳米颗粒时，^-2  h ^-1 bar ^-1（LMH bar ^-1）和98.6％的脱盐率，适用于20 bar的微咸水淡化。该透水率比原始薄膜复合材料（TFC）膜高52％，同时可以很好地保持脱盐率。此外，当使用32000 ppm NaCl的海水作为50 bar的进料时，可获得高于38 LMH的稳定水通量。