The Need

Superoleophobic surfaces have a number of advantages including anti­fouling, self-cleaning, anti-smudge, and low-drag. These applications are useful in a number of industries including medical, transportation, aerospace, energy, and construction. Current techniques for creating superoleophobic polycarbonates distribute nanoparticles throughout the polymer, affecting the substrate and reducing mechanical durability. A technique is needed to create a superoleophobic polycarbonate surface without affecting the bulk properties of the material.

The Technology

Dr. Bharat Bhushan and his colleagues at The Ohio State University have developed a novel way to manufacture superoleophobic coatings on the surfaces of polymers. In this invention, a durable superoleophobic polycarbonate has been created through the incorporation of nanoparticles into the polymer surface. Polycarbonate, when exposed to acetone impregnated with nanoparticles, develops a rough, superhydrophobic surface with re-entrant geometry. Since the nanoparticles are only incorporated near the surface and the near-surface region of the polymer, they don’t affect the properties of the bulk material. In order to achieve a mechanically durable coating, SiO2 particles are used. Finally, oil repellency is achieved through UV and fluorosilane treatment.

Commercial Applications

• Airplane wing coatings
• Biological surfaces
• Ship exteriors
• Plastics

Benefits/Advantages

• Doesn't affect the bulk properties of the material
• Ease of fabrication
• Improved durabilty

Patent Protection

• United States Patent No. 10,947,355