2023-08-30 06:13:00
Researchers in China have developed an assembly of copper nanowires to solve the problem of frost that forms on certain surfaces, such as airplane wings. This nanostructure is superhydrophobic and effectively uses solar energy to melt any ice that manages to form.
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Researchers from Dalian University of Technology in China have found a new solution for the problem of icing in many areas, such as on airplanes or even during cryogenics. In an article published in the journal International Journal of Extreme Manufacturingthey detail how the use of copper nanowires makes it possible to defrost surfaces with an efficiency close to 100%.
Rather than using more traditional methods such as a mechanical system, electrical heating, or even ultrasonic vibrations, the copper nanowires make it possible to create a passive system, which uses only solar energy.
A blend that brings together three properties
The researchers tested different assemblies of nanowires, before opting for copper nanowires placed vertically and separated by 1 to 3 micrometers. This nanostructure is superhydrophobic, which limits the formation of frost. In addition, copper nanowires have high thermal conductivity, as well as a photothermal effect. This system can absorb more than 95% of sunlight, and distribute heat over its entire surface, melting any ice in record time. Thanks to the combination of these three properties, defrosting would be 2 to 3 times faster than with all existing nanostructured surfaces.
Aircraft of the future will resist icing thanks to the lotus effect
However, the researchers will have to solve a number of problems before considering large-scale production. According to Xuehu Ma, one of the authors of the article, durability, extensibility and chemical stability of nanowire assemblies are limited in practical applications involving complex working conditions ».
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