American Chinese scientists invent cheap "cooling plastics"

Two Chinese-American professors working at the University of Colorado, Professors Ronggui Yang and Xiaobo Yin recently published an invention in the top science and technology magazine “Science”. They developed a epoch-making cooling material. Instead of plugging in electricity, you can cool yourself ; instead of transferring the burden to anything else on the planet, you can send extra calories directly to outer space. Energy-saving, low-carbon, high-efficiency, environmental protection... This is simply the most ideal cooling material for modern people!

From a microscopic point of view, this new material is made up of many small glass beads with diameters of around 8 microns randomly embedded in transparent plastic.

Ordinary plastic, ordinary small glass beads, combined, but it is a room temperature radiation "black body." This black body film material can radiate energy in the form of far-infrared electromagnetic waves to achieve a cooling effect. And the emission channel for this material is the 8-14 μm wavelength band. There is almost no resistance to the earth's atmosphere for this wavelength of energy. In other words, these emitted heat are not “converted and digested” by the atmosphere, such as reflection, absorption, and scattering. Instead, they directly pass through the atmosphere and enter outer space, never returning. Graphically speaking, this "plastic" is an energy transfer path in a room temperature environment and an extremely cold environment with a temperature of minus 270 °C in outer space . It can continuously transfer heat that is not available on Earth.

If the surface of the material is coated with a nano-scale metal film, the cooling effect will be better. Not only can the heat be sent away, but the sunlight can also be reflected away, and objects that need to be cooled will not be warmed by absorbing sunlight. . Experiments have shown that this material has a radiant cooling power of up to 93 W/m 2 in direct sunlight at noon and can easily cool down objects in contact with it by 10-16 °C .

The research topics of the two professors are to find a more energy-saving and environmentally-friendly method for the air-conditioning of homes and the cooling of large power plants. Radiation cooling has always been the direction that top scientists in this subject area are actively exploring. The methods of Professor Yin and Professor Yang are simple and inexpensive. At present, the molded material production line has been produced in the laboratory.

The cost of a reeled product is only $0.5/square meter, which is a plastic price!

Global warming has always been a common topic for humanity. This new technology that uses the cold source of minus 270 °C in outer space is a new exploration direction to solve the problem of global warming. We hope that this material will be commercialized sooner, so that more people can enjoy its benefits and the trend of global warming can be slowed down as soon as possible.

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