Constructing an interlayer between porous substrate and polyamide (PA) film is an effective strategy to overcome the ubiquitous trade-off between permeability and selectivity, which are both important properties for nanofiltration performance. In this study, a poly(sodium 4-styrenesulfonate) (PSS) assisted interfacial synthesis method was proposed to fabricate a zeolitic imidazolate framework-8 (ZIF-8) interlayer between the PA film and microporous poly(ether sulfone) (PES) membrane. The addition of PSS to Zn²⁺ containing aqueous solution was able to stabilize the ZIF-8 layer formed at the water/n-hexane interface and benefited the homogeneous loading of ZIF-8 on the substrate with effective coverage of the macrovoids. The surface of ZIF-8 loaded PES membrane became smoother and more negatively charged, providing improved conditions for interfacial polymerization to form a thin, loose, and defect-free PA film. The pure water permeance of the TFC membrane containing modified ZIF-8 interlayer was 9.6 L m^-2 h^-1·bar^-1, twice that of the pristine TFC membrane. Meanwhile, its rejection of sodium sulfate, rhodamine B, and acid fuchsin was well maintained. The introduction of ZIF-8 interlayer via the PSS assisted interfacial synthesis method was a promising technique to fabricate high-performance NF membrane for water treatment.

在多孔基材和聚酰胺（PA）膜之间构造中间层是一种有效的策略，可以克服渗透率和选择性之间普遍存在的折衷，这两者对于纳滤性能而言都是重要的特性。在这项研究中，提出了一种聚（4-苯乙烯磺酸钠）（PSS）辅助界面合成方法，以在PA膜和微孔聚（醚砜）（PES）膜之间制造沸石咪唑骨架8（ZIF-8）中间层。 。将PSS添加到含Zn ²⁺的水溶液中能够稳定在水/ n处形成的ZIF-8层-己烷界面，有利于ZIF-8在基质上的均匀负载，并有效覆盖了大孔。装有ZIF-8的PES膜的表面变得更光滑，带更多的负电荷，为界面聚合提供了形成薄，疏松且无缺陷的PA膜的条件，为它们提供了改善的条件。含有改性的ZIF-8中间层的TFC膜的纯水渗透率为9.6 L m ^-2  h ^-1 ·bar ^-1，是原始TFC膜的两倍。同时，其对硫酸钠，若丹明B和酸性品红的排斥反应得以良好维持。通过PSS辅助界面合成方法引入ZIF-8中间层是一种制备用于水处理的高性能NF膜的有前途的技术。