A new sunscreen developed by Tsinghua University researchers cools the skin by up to 6 degrees Celsius, offering a significant advancement in sun protection technology.
We all know sunscreen is a must for protecting our skin from the sun’s harmful UV rays. But did you know that the currently available sunscreen doesn’t actually cool you down? In fact, it can sometimes even trap heat. But now, researchers at Tsinghua University in Beijing have developed a new sunscreen that not only blocks those harmful UV rays but also keeps you feeling refreshingly cool.
Interestingly, it offers a cooling advantage of up to 6 degrees Celsius (11 degrees Fahrenheit) over existing sunscreens. The new “sunscreen prototype exhibits promising commercial potential, especially as temperatures in the summer continue to rise,” the researchers mentioned. This sunscreen could particularly be beneficial for outdoor workers due to its waterproof nature and its high level of sun protection. Compared to a commercial sunscreen, the new formula kept the skin cooler when measured under a thermal camera (blue area on right-hand image).Radiative cooling is a technology that cools objects by either reflecting or emitting heat away from them. This technique is already being used to develop innovative materials like cooling fabrics and coatings for buildings. Titanium dioxide (TiO2), a heat-reflective white mineral, is crucial in certain passive radiative cooling technologies. Mineral sunscreens use TiO2 to block UV rays, but the particle size is generally not optimized for effective heat reflection and cooling. This new study focused on optimizing the size of TiO2 nanoparticles to develop a sunscreen with both UV-blocking and radiative cooling properties. This prototype sunblock was formulated using TiO2 nanoparticles, water, ethanol, moisturizing cream, pigments, and polydimethylsiloxane, a common silicone polymer in cosmetics.This new cooling sunscreen offers a significant advancement in sun protection technology. The modified size of the TiO2 nanoparticles resulted in a cooling effect by reflecting both UV light and solar hea
Sunscreen Radiative Cooling Titanium Dioxide UV Protection Innovation
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