Scientists have discovered that the oil on polar bear fur, called sebum, prevents ice from sticking, a key adaptation for survival in the Arctic.
An international research team has made a groundbreaking discovery about the unique properties of polar bear fur, revealing the secret behind their ability to remain ice-free even in frigid sub-zero temperatures. Their findings, published in the journal ACS Sustainable Chemistry & Engineering, shed light on the crucial role played by sebum, the naturally occurring oil found on polar bear fur.
\Polar bear fur boasts a remarkable double-insulation system, composed of hollow hairs that trap heat and a layer of black skin that absorbs sunlight. This combination helps them withstand the harsh Arctic climate. But what makes their fur truly exceptional is its ability to repel ice. For years, scientists have been puzzled by this phenomenon. Now, they have identified the key ingredient: sebum. This oily substance, composed of cholesterol, triglycerides, and fatty acids, coats the polar bear's fur, preventing ice crystals from adhering. \The researchers collected hair samples from six polar bears and conducted a series of meticulous tests to analyze the composition of their sebum. They found that polar bear sebum, unlike that of humans and other animals, lacks a specific component that promotes ice adhesion. This unique absence allows the polar bear's fur to effortlessly shed ice, ensuring their mobility and survival in their icy habitat. The findings not only deepen our understanding of polar bear biology but also hold promising implications for developing sustainable anti-icing coatings.
POLAR BEARS SEBUM ICE ADHESION ANTICING COATINGS PFAS REPLACEMENT
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