Surface modification of anion exchange membranes (AEMs) is a classic method to improve antifouling performance. However, the transport resistance of ions is elevated due to the addition of modified layer. Herein, a series of antifouling AEMs were designed via multilayered surface modification of commercial AEMs. Owing to the inherent hydrophilicity and electronegativity, MoS₂ flakes are picked as functional materials and electrodeposited on the surface of commercial AEMs to improve the antifouling performance. Meanwhile, rigid, irregular, and small-sized MoS₂ flakes tend to the formation of loose structure, thus decreasing the loss of ion transport ability. Polydopamine (PDA) is coated on the surface of MoS₂ modified AEMs to enhance the long-term stability of AEMs. Compared to commercial AEMs, the obtained AEMs display superior antifouling performance without obviously affecting desalination performance. Particularly, PDA@MoS₂ modified AEM only offers a 9% reduction in desalination rate, while the desalination rate is 1.88 times of that of commercial AEMs after antifouling experiments. This study may provide a source of inspiration for fabricating high-performance membranes with improved antifouling performance among various separation applications.

阴离子交换膜 (AEM) 的表面改性是提高防污性能的经典方法。然而，由于添加了改性层，离子的传输阻力升高。在此，通过对商用 AEM 进行多层表面改性，设计了一系列防污 AEM。由于固有的亲水性和电负性，MoS ₂薄片被选为功能材料并电沉积在商业 AEM 表面以提高防污性能。同时，刚性、不规则和小尺寸的MoS ₂薄片倾向于形成松散结构，从而减少离子传输能力的损失。聚多巴胺 (PDA) 包覆在 MoS ₂表面改性 AEM 以提高 AEM 的长期稳定性。与商业 AEMs 相比，所获得的 AEMs 显示出优异的防污性能，而不会明显影响脱盐性能。特别是PDA@MoS ₂改性AEM仅使脱盐率降低9%，而经过防污实验后脱盐率是商业AEM的1.88倍。这项研究可能为在各种分离应用中制造具有改进防污性能的高性能膜提供灵感来源。