Method for Repellency of Surfactant-Containing Liquids Using Nanoparticles and Binder
A surface coating which repels both oil and water.
Materials with a coating that repels both water and oil would be advantageous across a wide variety of industries and products. Benefits of this kind of coating could include antifouling, self-cleaning, and antismudging capabilities. While modern clear coats and paints do offer protection against water or oil, there are a lack of solutions able to protect against both while also retaining effectiveness in the event of physical property changes to the underlying surface.
The proposed coating is made of nanoparticles dispersed in a binder that results in a durable, superhydrophobic and superoleophobic surface. The nanoparticles used are hydrophobic and about 10 nm in length. The binder holds the nanoparticles and adheres to the substrate and then, the nanoparticle and binder coating is chemically activated using ultravioletozone treatment. After activation, a layer of fluorosilane is deposited for water repellency (hydrophobicity) and oil repellency (oleophobicity). The coating shows substrate independency and has been successfully applied to glass, polydimethylsiloxane (PDMS), polyethylene terephthalate (PET), polycarbonate (PC), and polypropylene (PP). It also exhibits repellency to surfactant-containing liquids such as shampoos and laundry detergents.