Robust superwetting separation membranes with high performance are highly suitable for separating organic liquids (OLs). Current OLs separation membranes do not conform to practical applications due to complex operations, high costs, and low mechanical stabilities. Herein, a simple one-step coaxial electrostatic spinning strategy was used to prepare candle soot (CS) reinforced flexible under-liquid superlyophobic fiber membrane (FUSFM), where the wetting behavior was regulated by forming stable liquid-injection interfaces. The permeation flux and separation efficiency of FUSFM-0.15 for OLs were 12,000 L m^–2 h^–1 and 99.7%, respectively. Compared with the modification by direct doping, the coaxial electrospinning ensured that CS nanoparticles were only distributed on the fiber surface to form a hierarchical roughness structure. The formation of defects due to the agglomeration of CS nanoparticles was prohibited in the fiber, so the FUSFM exhibited excellent mechanical properties (15 MPa). Moreover, the enhancement mechanism of nanoparticles on the mechanical properties of the membrane was analyzed by finite element simulation, and this synthesis strategy was also applied to other 0-dimensional nanoparticles. The FUSFM-0.15 demonstrates excellent flexibility, high chemical stability, and outstanding mechanical robustness. This work may inspire the design and preparation of a robust and cost-effective separation membrane for OLs.

中文翻译：

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用于有机液体分离的柔性且机械鲁棒的纳米纤维膜，具有蜡烛烟灰引起的粗糙表面


高性能、坚固的超润湿分离膜非常适合分离有机液体 (OL)。目前的OLs分离膜由于操作复杂、成本高、机械稳定性低等原因不符合实际应用。在此，采用一种简单的一步同轴静电纺丝策略来制备烛烟灰（CS）增强的柔性液下超疏液纤维膜（FUSFM），其中通过形成稳定的液体注入界面来调节润湿行为。 FUSFM-0.15对OLs的渗透通量和分离效率分别为12,000 L m ^–2 h ^–1 和99.7%。与直接掺杂改性相比，同轴静电纺丝保证了CS纳米粒子仅分布在纤维表面，形成分级粗糙结构。由于CS纳米粒子团聚而在纤维中形成缺陷被禁止，因此FUSFM表现出优异的机械性能（15 MPa）。此外，通过有限元模拟分析了纳米粒子对膜力学性能的增强机制，并将该合成策略也应用于其他0维纳米粒子。 FUSFM-0.15 表现出出色的灵活性、高化学稳定性和出色的机械鲁棒性。这项工作可能会启发设计和制备坚固且经济高效的 OL 分离膜。