Harvard University has developed an extremely smooth coating material
The American physicist organization network recently reported that Harvard applied scientists have followed the hydrophobic strategy of Nepenthes and developed an extremely smooth coating material that can repel almost any liquid including blood and oil, even under high pressure, Under extreme environmental conditions such as freezing, it still retains the ability to repel liquids or solids. This biomimetic drainage technology has wide applications in biomedical fluid handling, fuel transportation, anti-fouling, anti-freezing, etc. It is even expected to bring an automatic cleaning window and improved optical equipment. The research was published in the recent "Nature" magazine. Nepenthes is a carnivorous plant whose leaves resemble a cup. Especially after rain, the surface of its leaves will become almost frictionless, emitting a sweet taste, attracting ants, spiders, and even small frogs. Nepenthes's hydrophobic strategy is completely different from other plants. It can form a smooth coat on the top, turning the liquid itself into a hydrophobic surface. Inspired by this, the researchers injected a lubricating liquid into a gas-permeable material with nano-microstructure to make this hydrophobic surface called "SLIPS", which means "smooth breathable surface filled with liquid." "The new coating material we developed outperforms natural and artificial similar products, and provides a simple and versatile solution to the problem of solid-liquid rejection." The paper's lead author, Joanna, Harvard College of Engineering and Applied Sciences Eisenberg explained that other current hydrophobic surfaces, such as the water-repellent effect of the lotus leaf effect, use a special texture structure on the surface to make the water droplets gather and slide down, but the lotus leaf effect is not effective for some organic substances or complex liquids. Under extreme conditions, the liquid will stick or deposit on it, and this hydrophobic surface is difficult to make and expensive. "SLIPS, like Nepenthes, not only slips insects, but also repels a variety of liquids and solids. There is almost no obstruction. A very slight tilt will allow liquids or solids to slide off its surface." Eisenberg Ge said. They did many experiments with ants, and found that the ants would slip from above, or quickly back to the ground after climbing a few steps. Tak-Sing Wong, the lead author of the paper and a postdoctoral fellow in the Eisenberg laboratory, said: "Since SLIPS is very smooth, even if a knife is used to scrape a part, it can be repaired on its own immediately, and the turbidity performance is maintained after the repair. It can be used as an automatic healing material. If it is made into an optical lens, it is also an ideal automatic cleaning device. " In addition, it can maintain this almost frictionless characteristic under extreme conditions such as high pressure (675 atmospheres, equivalent to 7000 meters below sea level), humidity, and low temperature. The research team conducted experiments after a blizzard and found that it can repel ice in severe cold. Eisenberg said: "The stability and unique self-healing ability of SLIPS make it suitable for almost any application, such as polar or deep-sea exploration, bringing broad prospects for applications under harsh conditions." "Our bionic surface can not only work in various environments, but also has low cost and simple manufacturing." Said Sung Hoon Kang, co-author of the paper and PhD student at Eisenberg Laboratory, "it can also improve and upgrade , Because you can choose any kind of breathable material and a variety of lubricants. " At present, researchers are applying for a patent for this kind of pitcher plant technology. They anticipate that the technology can be used in the future to transport fuel and water pipelines, medical catheters (such as urinary catheters and blood transfusion systems), automatic cleaning windows, sterile non-scaling surfaces, etc. Anti-stick surface with fingerprints or graffiti marks, etc. Pe Cling Film For Food,Pe Cling Film,Cling Film Food,Kitchen Pe Cling Film DONGGUAN YEE HUP TRADING CO,.LTD , https://www.yeehupack.com