The beautiful lotus leaves are not stained, and the water droplets that roll off the lotus leaf can remove the dust and bacteria that are adsorbed on it. It is derived from the "superhydrophobic surface" possessed by the lotus leaf. The new paint developed by Lu Yao, a graduate of Dalian University of Technology, also allows the material to form a self-cleaning “foliage†surface, even after being scratched or worn. The research results were published in the newly published "Science" magazine.
In the past 20 years, the artificial superhydrophobic surface of lotus leaves has not been applied on a large scale. Lu Yao said that many of the existing superhydrophobic surfaces are easily polluted by oil and lose their self-cleanliness. To solve this problem, scholars have also managed to develop a hydrophobic and oleophobic superseparating surface. However, the double sparse surface is slightly superior to self-cleaning, but it does not apply to bearings, gears and other parts that require lubricating oil. The coatings developed by the Lu Yao team were made of fluorinated titanium dioxide nanoparticles, which are highly water-repellent, but unlike other waterproof coatings, they can still function after being damaged or exposed to oily substances.
“Titanium dioxide, fluorosilane, and ethanol needed for coatings are the most commonly used substances in the usual experiments.†Lu Yao said that one time, he accidentally coated a hydrophobic coating on a sticky surface of a transparent plastic and found that Or sandpaper, can not remove the paint from the glue. Based on this revelation, he tried to coat the glass surface with double-sided adhesive, and then added a hydrophobic coating to form a sandwich-like structure - the glass and the hydrophobic coating adhered to both sides of the double-sided tape. In this way, the surface becomes very strong, even with sandpaper cross friction dozens of times back and forth, can still maintain the super-hydrophobic surface.
Another research director, Song Jinglong, a doctoral student at the Dalian University of Technology’s School of Mechanical Engineering, said that this study provides a unique idea—to overcome the “weakness†of the super-hydrophobic field by giving it more mature viscose technology. In specific production practices, large-scale waterproofing of large-scale machinery and equipment, as well as small-scale self-painting of walls, can select their own glue as an “intermediary†according to their needs. (Zhang Pingyuan)
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