Nano-fillers will be an attractive strategy to improve salt fractionation of nanofiltration (NF) membrane if the integrity problem of nano-fillers in PA layer is well addressed. In this work, molybdenum disulfide (MoS₂) nanosheets sulfonated with 1,3-propane sultone was added to the aqueous phase to participate in the interfacial polymerization reaction and construct a novel thin-film nanocomposite (TFN) nanofiltration membrane. A series of characterization and discussion were carried out on the obtained nanomaterials and membranes. The S–MoS₂ nanosheet can be well wrapped by the resulted PA layer, thereby preserving the integrity of the PA skin. Furthermore, The TFN membranes possessed enhanced electronegativity and hydrophilicity and the PA layer became thinner and denser after introducing the sulfonated MoS₂ nanosheets (S–MoS₂) in the PA matrix. In particular, the optimal S–MoS₂ composite membrane exhibits excellent performance, which approximately reach 99% divalent salt (Na₂SO₄) rejection and 1.4-fold water permeance of the pristine membrane. Overall, this study provided a novel way for separation treatment of hypersaline wastewater.

如果 PA 层中纳米填料的完整性问题得到很好的解决，纳米填料将成为改善纳滤 (NF) 膜盐分馏的有吸引力的策略。在这项工作中，将用 1,3-丙磺酸内酯磺化的二硫化钼 (MoS ₂ ) 纳米片添加到水相中，参与界面聚合反应，构建了一种新型薄膜纳米复合材料 (TFN) 纳滤膜。对获得的纳米材料和膜进行了一系列表征和讨论。S-MoS ₂纳米片可以被生成的 PA 层很好地包裹，从而保持 PA 表皮的完整性。此外，在 PA 基质中引入磺化 MoS ₂纳米片 (S–MoS ₂ )后，TFN 膜具有增强的电负性和亲水性，PA 层变得更薄和更致密。特别是，优化的 S-MoS _{2复合膜表现出优异的性能，其二价盐 (Na 2} SO ₄ ) 截留率约为 99% ，水渗透率是原始膜的 1.4 倍。总体而言，本研究为高盐废水的分离处理提供了一种新方法。