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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Separation Technology

Background:

  • Superwetting porous membranes with tunable liquid repellency are essential for applications in research, chemical industries, and environmental protection.
  • Achieving controllable droplet bouncing or spreading, especially for low surface energy organic liquids (OLs), remains a significant challenge.

Purpose of the Study:

  • To develop nanoparticle-embedded membranes with tunable wettability for organic liquids.
  • To establish an interfacial physical parameter for regulating liquid-solid interactions.
  • To create a strategy for designing high-performance separation materials.

Main Methods:

  • Structuring synergistic layers with reconfigurable surface energy components on nanoparticle-embedded membranes.
  • Utilizing an aggregation-induced process to tune solid-liquid interactions.
  • Investigating the membrane's performance with polar protic, polar aprotic, and nonpolar liquids.

Main Results:

  • The developed membranes exhibit tunable liquid repellency and controllable droplet behavior for various organic liquids.
  • Demonstrated positive/negative liquid gating regularity based on liquid polarity.
  • Achieved superior separation efficiency and permeation flux for immiscible liquid mixtures.
  • Successfully performed successive in situ extraction-back extraction coupling.

Conclusions:

  • Pioneered a rational strategy for designing high-performance separation materials based on tunable wetting properties.
  • Provided distinctive insights into intrinsic wetting behaviors of organic liquids on engineered surfaces.
  • The developed membranes show promise for advanced liquid separation applications.