Superhydrophobic Coating

About

Background: Most superhydrophobic coatings made by currently available technologies are not durable: they don't have a good adhesion to the substrate, so they are easily scratched off; they deteriorate over time; they do not resist heating or corrosive chemicals; they lose superhydrophobicity once completely immersed in water for a long period of time.   Technology: This invention describes the synthesis method and the composition of a superhydrophobic coating which readily cures at room temperature, has good adhesion to the substrate, and forms a durable superhydrophobic surface. The coating can be applied on a variety of substrates (including metals, glass, ceramics, textiles, and paper) by conventional painting techniques including spraying, roller coating, dip coating, flow coating, and brushing. The finished surface has excellent superhydrophobicity: the water contact angle is greater than 170 degree C, and the sliding angle of a 4 microliter droplet is less than 1 degree. After cured at room temperature, the coating has good thermal stability (the superhydrophobicity remains up to 200 degree C), and is resistant to common corrosive chemicals including strong acids and bases.    Applications: 1. Water-proof layers 2. Self-cleaning surfaces 3. Skin drag reduction   Advantages: 1. After cured at room temperature, the coating has good thermal stability (the superhydrophobicity remains up to 200 degree C). 2. Coating is resistant to common corrosive chemicals including strong acids and bases. 3. The coated surface can be immersed in water for a long period of time without losing its superhydrophobicity.