An electrospun fiber membrane was prepared using polyamide 6 (PA6) to manufacture superhydrophobic and omniphobic nanofiber membranes for separation and purification processes that had excellent anti-fouling and anti-wetting performance. Trichloro(1H,1H,2H,2H-perfluorooctyl)silane (F-POSS) was used to treat the surface of PA6 with a fluorinated silane (F-silane) to impart a primary hydrophobic layer to the surface of the membrane. To enhance the hydrophobic properties of the membrane’s surface, a polyvinylidene fluoride (PVDF) coating solution was grafted to F-POSS to create PVDF-g-F-POSS. The PVDF-g-F-POSS agglomerated into nanoparticles on the membrane surface, which can decrease its wettability. As a result, the omniphobic property was improved, thereby modifying the contact angle between the feed solution and the membrane surface. In addition, by lowering the temperature sensitivity and surface tension of the liquid to improve its wetting retardation, the membrane could be used for membrane distillation. The contact angle of deionized water on the membrane was increased from 71° to 149° by the surface modification. The initial water flux was maintained for up to 20 cycles (162 h) due to the hydrophobicity of the membrane surface in the membrane distillation process. Ethylene glycol rejection of the omniphobic membrane was exhibited to be 100% for 200 h at 60 °C.

使用聚酰胺6（PA6）制备电纺纤维膜，以制造具有优异的防污和防湿性能的超疏水和全疏水纳米纤维膜，用于分离和纯化工艺。使用三氯（1H，1H，2H，2H-全氟辛基）硅烷（F-POSS）用氟化硅烷（F-硅烷）处理PA6的表面，从而在膜表面形成疏水性主涂层。为了增强膜表面的疏水性，将聚偏二氟乙烯（PVDF）涂层溶液接枝到F-POSS上以创建PVDF-gF-POSS。PVDF-gF-POSS会聚集成膜表面的纳米颗粒，从而降低其润湿性。结果，提高了全憎性，从而改变了进料溶液与膜表面之间的接触角。此外，通过降低液体的温度敏感性和表面张力以改善其润湿延迟，该膜可用于膜蒸馏。通过表面改性，去离子水在膜上的接触角从71°增加到149°。由于膜蒸馏过程中膜表面的疏水性，初始水通量可维持长达20个循环（162小时）。在60°C下200小时，全疏水膜的乙二醇排斥率显示为100％。由于膜蒸馏过程中膜表面的疏水性，初始水通量可维持长达20个循环（162小时）。在60°C下200小时，全疏水膜的乙二醇排斥率显示为100％。由于膜蒸馏过程中膜表面的疏水性，初始水通量最多可维持20个循环（162小时）。在60°C下200小时，全疏水膜的乙二醇排斥率显示为100％。