Oil–water separation has attracted research interest due to the damages of oily wastewater caused to the environment and human beings. Electrospun fiber membrane has high oil–water separation performance. A nanofibers membrane with multi‐stage roughness was prepared by electrospinning using poly(vinylidene fluoride)(PVDF)‐silica blend solution as raw material. The result shows that the water contact angle (WCA) of the nanofibers membrane was promoted from 138.5 ± 1° to 150.0 ± 1.5° when the SiO₂ content was increased from 0 to 3 wt%. The nanofibers membranes exhibited excellent separation efficiency (99 ± 0.1%) under gravity drive, with high separation flux of 1857 ± 101 L·m⁻²·h⁻¹. More importantly, the obtained PVDF‐SiO₂ nanofibers membranes showed excellent multi‐cycle performance and stable chemical resistance, which would make them great advantages for the practical application of oil–water separation.

中文翻译：

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电纺超疏水-超亲油性PVDF-SiO2纳米纤维膜，用于油水分离

由于含油废水对环境和人类造成的损害，油水分离引起了研究兴趣。电纺纤维膜具有很高的油水分离性能。以聚偏二氟乙烯（PVDF）-二氧化硅共混溶液为原料，通过静电纺丝制备了具有多级粗糙度的纳米纤维膜。结果表明，当SiO ₂含量从0wt％增加到3 wt％时，纳米纤维膜的水接触角（WCA）从138.5±1°提升到150.0±1.5° 。纳米纤维膜在重力驱动下表现出优异的分离效率（99±0.1％），分离通量为1857±101 L·m ^-2 ·h ^-1。更重要的是，所得的PVDF-SiO ₂ 纳米纤维膜表现出优异的多循环性能和稳定的耐化学性，这使其在油水分离的实际应用中具有巨大优势。