A new robotic hand is able to “sweat” to cool down. Hydrogel robots offer more safety, as opposed to a rigid metal hand. However, because hydrogel has a high water component, it is very difficult to cool down. Researchers layered the hydrogel, and when various layers are heated, they contract to leak water. This resulted in 6x faster cooling (compared to a non-sweating robot), and 3x faster cooling compared to humans and horses.
Sweat in nature does have some problems, such as grip and dehydration. The robot was still able to grip, but is not currently able to take in more water. The researchers are hoping to improve the design by adding that feature, and improve the performance of robots in different climates.
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