4.7 Article

An integrated Janus porous membrane with controllable under-oil directional water transport and fluid gating property for oil/water emulsion separation

Journal

JOURNAL OF MEMBRANE SCIENCE
Volume 627, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.memsci.2021.119229

Keywords

Janus porous membrane; Under-oil directional water transport; Oil; water emulsion separation

Funding

  1. National Natural Science Foundation of China [21961160739, 52003266]
  2. Development of Scientific and Technological Project of Jilin Province [20200801051GH, 2020122362JC]
  3. Scientific Research Funding Project of the Education Department of Liaoning Province [LJ2020QNL002]
  4. Higher Education Commission of Pakistan [203684/RD/HEC/14]
  5. Chinese Academy of SciencesWego Group Hightech Research & Development Program

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The development of a novel integrated Janus porous membrane enables self-propelled energy free directional water transport in oil systems, holding significant implications for areas such as liquid separation.
Directional liquid transport driven by the interface or surface property of Janus porous membrane owes great significance to many applications such as separation technology, fog collection, and energy devices. The Janus porous membranes have successfully demonstrated an efficient oil self-transport in water and also enable directional water transport in air or oil-water interface. However, the directional water transport in oil environment is a challenge because of the relatively low surface tension of oil. In this work, a novel integrated Janus porous membrane is developed for the first time to construct self-propelled energy free directional water transport in oil system that successfully demonstrated to be a facile ?water diode? for under-oil water one-way regulation. Additionally, this Janus porous membrane exhibits an interesting tunable fluid-gating behavior for either water or oil, using optimized conditions. The current findings may promote the innovation towards directional liquid transport science and will open up new avenues for diverse on-demand liquids manipulation scenarios such as water-in-heavy oil emulsion separation.

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