Incorporating multifunctional fillers into thin film composite (TFC) polyamide (PA) membranes have become a popular approach. Covalent organic framework nanosheets (CON) are expected as ideal fillers in the fabrication of TFC membranes owing to their intrinsic pores with tunable aperture size and large porosity. Herein, we report fabrication of TFC membranes by reacting piperazine (PIP) and trimesoyl chloride (TMC) in the presence of covalent triazine framework nanosheets (CTN) fillers. The incorporation of CTN in PA matrix created extra water channels in the form of pores and interfacial cavities, rendering the resultant PA-CTN TFC membranes ultra-high water flux (23.8 L m⁻² h⁻¹ bar⁻¹), an increase of 5 folds compared to pristine PA membrane and excellent Na₂SO₄ rejection of (>95%). Owing to the hydrophilic nature of CTN, the resultant PA-CTN TFC membranes also displayed higher hydrophilicity and improved anti-fouling properties. The approach in this study may not only offer some guidance on manipulating interfacial polymerization process through incorporating organic framework materials, but also offer some inspiration for the research and development of thin film composite membranes.

将多功能填料掺入薄膜复合 (TFC) 聚酰胺 (PA) 膜已成为一种流行的方法。共价有机骨架纳米片（CON）由于其固有的孔隙、可调孔径和大孔隙率，有望成为制备 TFC 膜的理想填料。在此，我们报道了在共价三嗪骨架纳米片 (CTN) 填料存在下，通过哌嗪 (PIP) 和均苯三甲酰氯 (TMC) 反应制备 TFC 膜。CTN 在 PA 基质中的掺入以孔和界面腔的形式产生了额外的水通道，使所得的 PA-CTN TFC 膜具有超高的水通量（23.8 L m ^-2 h ^-1 bar ^-1），增加了与原始 PA 膜和优异的 Na 相比是 5 倍₂ SO ₄排斥（>95%）。由于 CTN 的亲水性，所得 PA-CTN TFC 膜还显示出更高的亲水性和更好的防污性能。本研究的方法不仅可以为通过引入有机骨架材料来操纵界面聚合过程提供一些指导，而且可以为薄膜复合膜的研究和开发提供一些启发。