Organic solvent nanofiltration (OSN) as a high-efficient membrane separation technology has play an important role in chemical industrial separation, clean energy production, and high-value resources recycling, etc. Inspired by the asymmetric biological structure of Desert beetle, herein a novel kind of polymeric OSN membranes with asymmetric structure have been fabricated via fluorinated polymeric networks (FPNs) regulated interfacial polymerization. The FPNs were formed with m-phenylenediamine (MPD), dopamine (DA) and 1H,1H,2H,2H-Perfluorodecane-thiol (PFDT) via the Michael addition and Schiff-base reaction. The FPNs tailored thin-film composite membrane (FPN-TFC) with biomimetic asymmetric structure, e.g., much hydrophilic looser front surface and much hydrophobic denser rear surface, exhibits an optimum ethanol permeance ~15.7 L m⁻² h⁻¹.MPa⁻¹ and high rejection ~99.5% for Rose Bengal (RB) dye molecules (test with 0.05 g L⁻¹ RB ethanol solution at 25 °C under 1.5 MPa), which is almost 6 times higher than that of the conventional TFC membranes. Moreover, there is a good stability for the FPN-TFC membrane tested with different polar solvents in long-term operation process. Therefore, this work provides a guidance for the development of advanced polymeric OSN membranes with both high solvent permeability and solute selectivity, as well as good stability in OSN process, which would have broad application prospects in chemical and other industrial fields.

有机溶剂纳滤（OSN）作为一种高效的膜分离技术，在化学工业分离，清洁能源生产和高价值资源回收等方面起着重要作用。受沙漠甲虫不对称生物结构的启发，本文采用新型通过氟化聚合物网络（FPNs）调控界面聚合反应，制备了一种具有不对称结构的聚合物OSN膜。通过迈克尔加成反应和席夫碱反应，由间苯二胺（MPD），多巴胺（DA）和1H，1H，2H，2H-全氟癸烷-硫醇（PFDT）形成FPN。FPNs定制的具有仿生非对称结构的薄膜复合膜（FPN-TFC），例如亲水性更强的前表面和疏水性更强的后表面，表现出最佳的乙醇渗透性〜15.7 L m^-2  h ^-1 .MPa ^-1和对玫瑰红（RB）染料分子的高排斥率〜99.5 ％（使用0.05 g L ^-1  RB乙醇溶液在25°C和1.5 MPa下测试），几乎是其高6倍常规TFC膜的性能。此外，在长期操作过程中，使用不同极性溶剂测试的FPN-TFC膜具有良好的稳定性。因此，这项工作为开发具有高溶剂渗透性和溶质选择性，以及在OSN工艺中具有良好稳定性的高级聚合物OSN膜提供了指导，这将在化学和其他工业领域中具有广阔的应用前景。