A new type of polymer coating can cool down buildings and cars
Image Source: Smithsonian Magazine

A group of scientists, in which Indian origin scientists too present have now invented a polymer coating which acts like a spontaneous air cooler. This can also be applied to the paint on the rooftops, buildings, vehicles as well as water tanks or even in the spacecraft. The researchers who have invented this are from Columbia University in the US that is used a solution based phase inversion technique. It can give the high-performance exterior passive daytime radiative cooling (PDRC) polymer. This is a porous foam-like structure.

PDRC is said to be a phenomenon where the surface spontaneously gets cools by reflecting the sunlight and then radiating the heat to the cold temperatures. This was developed by the ODRC designs which have been said to be very challenging. In many recent proposals of the design, they are complex or even costly which cannot be widely implemented or even applied on the rooftops as well as on buildings. They have got different shapes as well as textures, as said by the researchers which include Jyotirmoy Mandal, who is the doctorate student at the Columbia University.

As per the researchers, the white paints are said to be inexperienced as well as they are easy to apply as they have got the benchmark for PDRC. It has been seen that these white paints, which have pigments that can absorb the ultraviolet light as they don’t reflect the long solar wavelengths, as the performance is said to be only modest at best.

This polymer turns white as a result it avoids the solar heating which is intrinsic emittance that causes them to lose the heat to the sky efficiently. The team has built this work which can demonstrate the simple plastic as well as polymers that include silicone, PET and acrylic.

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