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Superhydrophobic coatings have very broad application prospects in the commercial and industrial fields. However, most coatings are not water resistant, meaning that their water repellency properties are easily lost. Recently, scientists from the Australian National University (ANU) have developed a new super-hydrophobic spray coating, which is more durable than the existing super-hydrophobic coating and has lower production costs.
The surface of the hydrophobic material is usually rough and consists of regularly arranged nano-columnar structures. When the water droplets land on such a rough surface, some of the air will be “shut off†between the water and the solid surface, resulting in most of the water droplets coming into contact with the air, and the direct contact area with the solids is greatly reduced.
However, there is also a problem that these complicated surfaces are easily damaged, thereby reducing the long-term waterproof effect of the material. For example, fluorine-containing nano-silicon dioxide is a highly water-repellent super-hydrophobic material, but its water-repellent performance in commercial applications is not ideal because the surface abrasion caused by the material during the machining process results in a water-repellent property. Greatly weakened.
Scientists from the Australian National University (ANU) began to work hard to improve the waterproof durability of superhydrophobic materials. Their newly developed coating of superhydrophobic material, with addition of polymethyl methacrylate and polyurethane, greatly increased the surface roughness of the material. In the experiment, the researchers found that the coating will not cause too much effect on its superhydrophobic properties under long-term wear and tear.
The new superhydrophobic material coating also resists corrosion from acid solutions, UV light and some cleaning solvents. The coating only needs to be sprayed once to maintain the waterproof performance of the sprayed surface for a long time.
The new super-hydrophobic material coating is completely transparent, so it may be applied to the waterproofing of consumer electronics such as smart phones in the future, greatly improving the waterproof performance of electronic devices.
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