SYDNEY – As climate change makes deadly heatwaves more frequent, and with the high cost of air conditioning making it inaccessible for many, an affordable solution is urgently needed. Scientists in Australia may have found one by developing a revolutionary paint that could eliminate the need for AC.
Researchers from the University of Sydney have created a roof coating that keeps a surface up to 6 degrees Celsius cooler than the surrounding ambient temperature.
This “paint” has a unique dual function. First, using a porous film, it reflects 96% of solar radiation back into the atmosphere, effectively scattering heat. Second, it simultaneously pulls water vapor from the air.
Scientists explained that as the paint repels solar heat during the day, its surface becomes cool. This coolness causes moisture from the air to condense onto the surface, much like dew forming on a car at night. This combined effect significantly lowers indoor temperatures during severe hot weather.
The findings, published in the journal Advanced Functional Materials, were based on a 6-month test where the paint was applied to the roof of the Sydney Nanoscience Hub. Researchers also noted that when combined with a UV-resistant coating, the paint can harvest the condensed dew, collecting the water in a container.
