A research team led by the University of California, Los Angeles (UCLA) scientists has created a super white paint that reflects as much as 98% of incoming heat from the sun and keeps buildings cool amid high temperatures.
The development shows practical pathways for designing paints that, if used on rooftops and other parts of a building, could significantly reduce cooling costs.
The Phys.org website quoted researcher Aaswath Raman, an assistant professor of materials science and engineering at UCLA, saying “When you wear a white T-shirt on a hot sunny day, you feel cooler than if you wore one that’s darker in color; that’s because the white shirt reflects more sunlight and it’s the same concept for buildings.
“The new paint is designed to reject heat at infrared wavelengths, which we humans cannot see with our eyes. This could allow buildings to cool down,” he explained.
According to studies, the best performing white paints currently available typically reflect around 85% of incoming solar radiation. The remainder is absorbed by the chemical makeup of the paint. However, the new paint could reflect as much as 98% of incoming radiation.
To make the new paint, the research team used barite and polytetrafluoroethylene, better known as Teflon. These ingredients help paints reflect UV light and absorb heat.