Zhang Min, Gao Jing, Liu Guanhua, Zhang Miyu, Liu Hengrao, Zhou Liya, Liu Yunting, Zheng Xiaobing, Jiang Yanjun
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, China.
Langmuir. 2021 Jan 12;37(1):417-427. doi: 10.1021/acs.langmuir.0c03068. Epub 2020 Dec 21.
Although loose nanofiltration membranes have been extensively studied for dye desalination, high-throughput membranes with antifouling and antibacterial properties are still highly needed. In this study, a zwitterion-modified molybdenum disulfide (MoS) dual-layer loose nanofiltration membrane was prepared with the integration of antibacterial, antifouling, and high-flux properties. To be specific, MoS nanosheets were loaded on a polyacrylonitrile ultrafiltration membrane through pressure-assisted self-assembly. Then, poly (sulfobetaine methacrylate) (PSBMA) was coated on the surface of the MoS membrane via a simple polydopamine (PDA)-assisted one-step codeposition to prepare PSBMA/PDA/MoS nanofiltration membranes. Elemental and morphological analyses confirmed the formation of the MoS layer and PSBMA/PDA coating. In addition, the effect of the PSBMA amount and codeposition time on surface properties and membrane performances was investigated. Under optimum conditions, the as-prepared membrane showed excellent water permeance of 262 LMH/bar with good dye rejection (99.8% for methylene blue) and salt permeability, as well as excellent antifouling and antibacterial properties benefiting from the synergy of PSBMA/PDA coating layers and MoS layers.
尽管松散纳滤膜已被广泛研究用于染料脱盐，但仍迫切需要具有抗污染和抗菌性能的高通量膜。在本研究中，制备了一种两性离子改性的二硫化钼（MoS）双层松散纳滤膜，该膜兼具抗菌、抗污染和高通量性能。具体而言，通过压力辅助自组装将MoS纳米片负载在聚丙烯腈超滤膜上。然后，通过简单的聚多巴胺（PDA）辅助一步共沉积法将聚（甲基丙烯酸磺酸甜菜碱）（PSBMA）涂覆在MoS膜表面，制备PSBMA/PDA/MoS纳滤膜。元素分析和形态分析证实了MoS层和PSBMA/PDA涂层的形成。此外，研究了PSBMA用量和共沉积时间对表面性能和膜性能的影响。在最佳条件下，所制备的膜表现出优异的水渗透通量，为262 LMH/bar，对染料（亚甲基蓝的截留率为99.8%）和盐分具有良好的截留性能，并且由于PSBMA/PDA涂层和MoS层的协同作用，具有优异的抗污染和抗菌性能。
