Oil/water emulsion separation in harsh environments remains a big challenge. Herein, a double layered nanofibrous composite membrane was developed by assembly of polydopamine‐modified hexagonal boron nitride (h‐BN‐PDA) onto a poly(arylene ether nitrile) (PEN) nanofibrous mat. Owing to the synergistic effect of a h‐BN‐PDA skin layer and a PEN nanofibrous mat supporting layer, as‐prepared composite membrane exhibited high thermal stability, corrosion resistance, and superhydrophilic/underwater superoleophobic property. Consequently, the PEN composite membrane showed good antifouling performance and a high rejection ratio (>99.0%) for various oil/water emulsions. After 10 cycles, the separation flux of PEN composite membrane still reached 588.1 L/m² h under the operating pressure of 0.04 MPa. Furthermore, the PEN composite membrane could still achieve high separation efficiency and high flux in high‐temperature (65 °C) and strongly corrosive conditions (pH = 1‐13). Therefore, the stable and efficient h‐BN‐PDA/PEN composite membrane showed potential application for treating oily wastewater in harsh environments.

中文翻译：

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超亲水/水下超疏油聚多巴胺改性的h-BN /聚（亚芳基醚腈）复合膜的构建，可稳定分离油水乳液

在恶劣环境下油/水乳液的分离仍然是一个巨大的挑战。在此，通过将聚多巴胺改性的六方氮化硼（h-BN-PDA）组装到聚亚芳基醚腈（PEN）纳米纤维垫上，开发出了一种双层纳米纤维复合膜。由于ah-BN-PDA表皮层和PEN纳米纤维垫支撑层的协同作用，所制备的复合膜表现出高的热稳定性，耐腐蚀性和超亲水/水下超疏油性。因此，对于各种油/水乳液，PEN复合膜均显示出良好的防污性能和较高的废品率（> 99.0％）。10个循环后，PEN复合膜的分离通量仍达到588.1 L / m ² h在0.04 MPa的工作压力下。此外，PEN复合膜在高温（65°C）和强腐蚀条件下（pH = 1-13）仍可实现高分离效率和高通量。因此，稳定，高效的h-BN-PDA / PEN复合膜在潜在的恶劣环境中具有潜在的处理含油废水的潜力。