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A bio-inspired method to fabricate the substrate-independent Janus membranes with outstanding floatability for precise oil/water separation

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Abstract

The lotus leaf has the Janus wettability and outstanding floatability at multiphase interface. The ingenious design on lotus leaf surfaces enlightens us to fabricate the superhydrophobic/superhydrophilic binary cooperative membrane. Making use of the poor permeability of the candle soot, deposition of a layer of candle soot enables to form the Janus membrane with anisotropic wettability on different surfaces. After fixed by the hydrophobic polymer, the superhydrophobic/superhydrophilic binary cooperative membranes are prepared successfully on various membranes, such as filter paper, cotton fabric and copper mesh. The Janus membrane exhibits excellent interfacial floatability at the immiscible oil–water interface as a separator, thus affording high-performance immiscible oil/water separation without applied external pressure.

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Acknowledgements

This work was supported by the Scientific Research Funding Project of the Education Department of Liaoning Province (LJ2020QNL002), the Development of Scientific and Technological Project of the Jilin Province (No. 20160519017JH), and Chinese Academy of Sciences—Wego Group High-Tech Research & Development Program.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Liaoning Technical University, Fuxin, 123000, People’s Republic of China

    Zhecun Wang, Jianlin Yang & Shiyu Song

  2. Department of Prosthodontic Dentistry, Hospital of Stomatology, Jilin University, Changchun, Jilin, 130021, People’s Republic of China

    Xiaoqiu Liu

  3. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China

    Shenghai Li

  4. University of Science and Technology of China, Hefei, 230026, People’s Republic of China

    Shenghai Li

Authors
  1. Zhecun Wang
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  2. Jianlin Yang
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  3. Shiyu Song
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  4. Xiaoqiu Liu
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  5. Shenghai Li
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Corresponding author

Correspondence to Zhecun Wang.

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Wang, Z., Yang, J., Song, S. et al. A bio-inspired method to fabricate the substrate-independent Janus membranes with outstanding floatability for precise oil/water separation. Bull Mater Sci 44, 153 (2021). https://doi.org/10.1007/s12034-021-02405-6

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  • DOI: https://doi.org/10.1007/s12034-021-02405-6

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