Janus gradient meshes for continuous separation and collection of flowing oils under water

Ning Li, Cunlong Yu, Yifan Si, Meirong Song, Zhichao Dong, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)


Gradient meshes with Janus wettabilities are fabricated to stably separate and collect spilled oils from a range of flowing oily wastewater. Here, we demonstrate an overflow with separation methodology, which combines selective oil overflow and membrane separation, to separate low content oils from dynamic flowing oil-water mixtures by a curved gradient mesh that covered on a solid edge. The microscaled air-oil-water-solid four-phase wetting state during the oil-water separation process is visualized and demonstrated. The fundamental understanding of this overflow with separation system and the superior gradient mesh materials would enable us to construct a wide variety of separation devices out of traditional designs and advance related applications, such as wastewater treatment and fuel purification.

Original languageEnglish
Pages (from-to)7504-7511
Number of pages8
JournalACS Applied Materials & Interfaces
Issue number8
Publication statusPublished - 28 Feb 2018
Externally publishedYes


  • hydrodynamic
  • Janus
  • oil-water separation
  • overflow
  • superoleophobicity

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