Gravity-driven and high flux super-hydrophobic/super-oleophilic poly(arylene ether nitrile) nanofibrous composite membranes for efficient water-in-oil emulsions separation in harsh environments

Nanofibrous membranes with super-wetting feature exhibit promising application for oil/water emulsion separation, but achieving durability and high separation efficiency in harsh environments remains challenging. Herein, we developed a facile and effective strategy to prepare super-hydrophobic/super...

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Veröffentlicht in:Composites. Part B, Engineering Engineering, 2019-11, Vol.177, p.107439, Article 107439
Hauptverfasser: He, Shuangjiang, Zhan, Yingqing, Bai, Yulong, Hu, Jiaxin, Li, Yunzhao, Zhang, Guiyuan, Zhao, Shumei
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Sprache:eng
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Zusammenfassung:Nanofibrous membranes with super-wetting feature exhibit promising application for oil/water emulsion separation, but achieving durability and high separation efficiency in harsh environments remains challenging. Herein, we developed a facile and effective strategy to prepare super-hydrophobic/super-oleophilic nanofibrous composite membranes, which perfectly integrated the two processes of electrospinning and fixing hydrophobic TiO2 nanoparticles to the surface of interconnected poly(arylene ether nitrile) (PEN) nanofibers using EVO-STIK serious glue. As a result, the constructed super-hydrophobic PEN/P–TiO2 nanofibrous composite membranes (WCA = 165 ± 2.4°) exhibited excellent separation efficiency (99.75 ± 0.12%) under gravity drive, with extremely high separation flux of 6853.65 ± 274 L/m2·h for surfactant-free emulsions and 3531.62 ± 231 L/m2·h for surfactant-stabilized emulsions. More importantly, the obtained PEN/P–TiO2 nanofibrous composite membranes showed stable super-hydrophobic feature and oil/water emulsion separation performance in harsh environments such as strongly corrosive solutions, physical damage, and high/low-temperature systems. Therefore, the super-wetting nanofibrous membranes with easy-handling, durable, and efficient oil/water separation performance could find potential application for emulsified oil-water separation system in harsh environments. [Display omitted] •Novel easy-handling and durable super-hydrophobic/super-oleophilic PEN nanofibrous composite membrane was fabricated.•Fixation of hydrophobic TiO2 nanoparticles to PEN nanofibers by commercial glue resulted in stable super-wetting feature.•The membrane possessed high flux of 6856 L/m2 h and high rejection (>99%) under gravity drive.•The membrane exhibited stable super-hydrophobic property and efficient oil/water separation in harsh environments.
ISSN:1359-8368
1879-1069
DOI:10.1016/j.compositesb.2019.107439