World's White Paint Reflects Heat And Can Now Be Used On Cars | Carscoops carscoops
Although it was capable of reflecting 98.1 percent of sunlight, cooling the interior of surfaces painted with it by more than 4.5°C below ambient temperature, the paint was too heavy for applicationsLA Covers 1 Million Square Feet Of Roads Will Special Paint To Cool The City Down
Purdue University researchers have created a new formula for the world’s whitest paint, making it thinner and lighter. The previous iteration required a layer 0.4mm thick to achieve sub-ambient radiant cooling. The new formulation can achieve similar cooling with a layer just 0.15 mm thick. This is thin and light enough for its radiant cooling effects to be applied to vehicles like cars, trains and airplanes. manufacturers to architects to companies that make clothes and shoes,” said Ruan.
So, Ruan and his team started experimenting with materials and came up with their latest formulation, which incorporates hexagonal boron nitride as the pigment. The substance is normally used in lubricants, but it allows the paint to achieve nearly the same reflectance as the original paint, while being in a 150-micron-thin layer.shape of the boron helps scatter light, but because it also incorporates voids filled with air that helps further reduce the weight of the paint.
“This light weight opens the doors to all kinds of applications,” said George Chiu, a Purdue professor of mechanical engineering. “Now this paint has the potential to cool the exteriors of airplanes, cars or trains. An airplane sitting on the tarmac on a hot summer day won’t have to runAccording to the team, the paint is especially useful because unlike other local cooling methods, like air conditioners, once it’s been applied, its use doesn’t emit greenhouse gases.
“We are in discussions right now to commercialize it,” said Ruan. “There are still a few issues that need to be addressed, but progress is being made.”
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