Coating material to cool down surfaces in direct sunlight

A team of researchers in the United States has developed a paint material that can be used to cool surfaces under direct sunlight.

The study, which was published in the journal "Cell Report Physical Science", showed that the new material can be used for commercial purposes as it is low in cost, and can reflect 95.5 percent of the sunlight that falls on it to the outside, while similar paint materials used at the present time reflect Between 80 and 90 percent of the sun's heat.

During the summer months in hot regions, most buildings depend on air conditioners for cooling purposes, but these systems consume large amounts of energy and emit huge thermal energy that leads to converting cities into "thermal islands" and contribute to the exacerbation of the climate crisis. Scientists have sought since the seventies of the last century to develop paint materials that can reflect the sun's rays, although their efforts were unsuccessful to develop a material that can reflect a sufficient amount of sunlight, making it suitable for use in commercial purposes.

The "Science Daily" website, a specialist in technology, quoted researcher Chiolin Ruan, a professor of mechanical engineering at Pardo University, Indiana, as saying that "the development of coating materials suitable for reducing surface temperature is a continuous process, and it is of great importance in order to mitigate the effects of global warming."

The researchers used calcium carbonate particles in the manufacture of the new material instead of titanium oxide, which is commonly used in the manufacture of coatings, since this new material helps reduce the amount of infrared radiation absorbed by the paint, and thus transfers it to the walls of buildings, which leads to raising its temperature. To increase the concentration of particles in the paintwork by sixty percent in order to enhance the mechanisms of dispersal of sunlight.

Rowan expects that this new technology will benefit a wide range of industries, including residential and commercial buildings, data centers, warehouses, cars, and electrical appliances that are used in open spaces, military installations and service vehicles. He believes that this substance "can be used to combat climate change because it repels sunlight. Towards space. "

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