Rapid and Robust Surface Treatment for Simultaneous Solid and Liquid Repellency

Area of Science:

• Materials Science
• Surface Chemistry

Background:

• Surface contamination by liquids and solids degrades material performance.
• Existing anti-fouling strategies are often specific to contaminant types due to distinct repulsion mechanisms.

Purpose of the Study:

• To develop a universal surface modification technique for simultaneous liquid and solid contaminant repulsion.
• To investigate the structure-property relationship of novel siloxane-based surfaces.

Main Methods:

• Fabrication of surfaces with covalently tethered linear chain siloxane molecules.
• Characterization of surface morphology and liquid-like properties.
• Testing of anti-fouling performance against a wide range of liquids and solids.

Main Results:

• The siloxane surfaces exhibited a durable, liquid-like morphology.
• Surfaces effectively repelled diverse liquids (water, oils, organic, fluorinated solvents).
• Surfaces demonstrated significantly reduced adhesion to solids like ice, wax, and adhesives, and minimized scale nucleation.

Conclusions:

• A facile surface modification technique creates durable, liquid-like siloxane surfaces.
• These surfaces provide simultaneous and broad-spectrum anti-fouling properties against both liquids and solids.
• The liquid-like interfacial behavior is key to the versatile anti-fouling performance.