Super-Wettable Macrocycle Polymer Membranes for Effective Oil-Water Separation

Area of Science:

• Materials Science
• Polymer Chemistry
• Environmental Engineering

Background:

• Conventional oil-water separation membranes face challenges like complex fabrication, high energy demands, and limited scalability.
• Existing methods often struggle with efficiency and robustness in separating complex oil/water mixtures.

Purpose of the Study:

• To develop a novel, high-performance membrane for efficient oil-water separation using a macrocycle construction strategy.
• To address the limitations of current membrane preparation methods by utilizing pillararene-based polymers.

Main Methods:

• Synthesized a pillararene-based polymer (NP5-TOB) via room-temperature interfacial polymerization.
• Fabricated robust membranes using vacuum-assisted filtration for synergistic wettability and roughness control.

Main Results:

• Achieved high separation efficiency (>99%) for various complex oil/water systems under prewetting conditions.
• Demonstrated a high flux rate of up to 4858.35 L m^-2 h^-1.
• The NP5-TOB membrane exhibited excellent separation potential and robustness.

Conclusions:

• The macrocycle construction strategy using pillararenes offers a promising and facile route for developing advanced superwettable polymer membranes.
• The developed NP5-TOB membranes show significant potential for large-scale, high-performance oil-water separation applications.