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    • Keywords

       

      Lotus leaf; Janus membrane; floatability; oil/water separation.

    • 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.

    • Author Affiliations

       

      ZHECUN WANG1 JIANLIN YANG1 SHIYU SONG1 XIAOQIU LIU2 SHENGHAI LI3 4

      1. College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, People’s Republic of China
      2. Department of Prosthodontic Dentistry, Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, People’s Republic of China
      3. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
      4. University of Science and Technology of China, Hefei 230026, People’s Republic of China
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