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American scientists have invented the whitest paint so far, which can be applied to the roof of a building to have the function of cooling down
.
This invention was recently included in the Guinness World Records in 2022
.
This record book will officially go on sale on September 16
.
As early as the 1970s, some researchers made some attempts to invent a very white paint, believing that this method can also cool the house, which would be a more environmentally friendly method than using air conditioners
.
Xiulin Ruan, a professor of mechanical engineering at Purdue University in the United States, led his students to continue the research on this subject
.
They tried a total of more than 100 materials, and finally screened the remaining 10 key points for testing, and tried at least 50 different formulations for each material
.
The final material introduced by this research group not only reflects 98.
1% of solar radiation, but also emits infrared radiation to dissipate heat
.
Since the heat emitted by this paint is higher than the heat absorbed from the sun, its surface temperature will be lower than the ambient temperature
.
The most common white paint currently on the market will still heat up in the sun
.
These materials generally can only reflect 80%-90% of the sunlight, which is not enough to make the surface temperature lower than the temperature of the environment
.
Ruan Xiulin said that if this kind of paint is applied to a 1,000-square-foot roof, the cooling effect is similar to that of a 10-kilowatt air conditioner
.
"This is stronger than the central air-conditioning used in most residential houses
.
" There are mainly two key technologies that allow this coating to have such a good heat dissipation effect
.
According to the research, on the one hand, this material uses barium sulfate used in photo paper and cosmetics as a white pigment, which does not absorb ultraviolet rays; on the other hand, they make barium sulfate into small particles of various sizes.
.
Because particles of different sizes reflect light of different wavelengths, the pigment particles of different sizes used in this paint can reflect a wide range of light in the solar spectrum
.
The journal Applied Materials & Interfaces of the American Chemical Society (ACS) published this research report
.
This achievement has been patented
.
The research group is collaborating with a company to put this technology into commercial-scale production and put it on the market
.
.
This invention was recently included in the Guinness World Records in 2022
.
This record book will officially go on sale on September 16
.
As early as the 1970s, some researchers made some attempts to invent a very white paint, believing that this method can also cool the house, which would be a more environmentally friendly method than using air conditioners
.
Xiulin Ruan, a professor of mechanical engineering at Purdue University in the United States, led his students to continue the research on this subject
.
They tried a total of more than 100 materials, and finally screened the remaining 10 key points for testing, and tried at least 50 different formulations for each material
.
The final material introduced by this research group not only reflects 98.
1% of solar radiation, but also emits infrared radiation to dissipate heat
.
Since the heat emitted by this paint is higher than the heat absorbed from the sun, its surface temperature will be lower than the ambient temperature
.
The most common white paint currently on the market will still heat up in the sun
.
These materials generally can only reflect 80%-90% of the sunlight, which is not enough to make the surface temperature lower than the temperature of the environment
.
Ruan Xiulin said that if this kind of paint is applied to a 1,000-square-foot roof, the cooling effect is similar to that of a 10-kilowatt air conditioner
.
"This is stronger than the central air-conditioning used in most residential houses
.
" There are mainly two key technologies that allow this coating to have such a good heat dissipation effect
.
According to the research, on the one hand, this material uses barium sulfate used in photo paper and cosmetics as a white pigment, which does not absorb ultraviolet rays; on the other hand, they make barium sulfate into small particles of various sizes.
.
Because particles of different sizes reflect light of different wavelengths, the pigment particles of different sizes used in this paint can reflect a wide range of light in the solar spectrum
.
The journal Applied Materials & Interfaces of the American Chemical Society (ACS) published this research report
.
This achievement has been patented
.
The research group is collaborating with a company to put this technology into commercial-scale production and put it on the market
.
