Polar bears need all the helps that can be done to survive the cold Arctic environment. One of their largest survival secrets is like greasy hair. Sebum-Grease hair -fur is very difficult for ice to stick. For details on the survey results Studies published in the journal on January 29 Science advancementAnd chemists and engineers can help develop new anti -ice coating for more durable fabrics, skiing, and snowboarding.

Extremely earthen animals as inspiration

The polar bears have thick fat layers under the two -layer fur, confining the heat of the internal body. According to Polar Bears InternationalThese layers can keep them very warm, and they can overheat as soon as adult men run. The ice does not accumulate in it, despite the fact that the bear is freezing cold water.

Richard Hobbus, a co -author and cherries of Dublin’s Trinity College, said, “Animals living in a habitat living in the polar land have emerged as the source of inspiration for the development of new prevention materials.” I said in a statement.

For details on the method, the team gathered hair from six wild polar bears. They measured the adhesion strength of the ice and felt how much it could stick to fur. Next, they saw them Hydrophobicism-A process to determine whether water can be washed before the water freezes. Finally, we analyzed the time it takes to freeze one drop at a specific temperature of a freezing delay or at a specific temperature on a specific surface. After that, I compared the performance of the polar bears with human hair and the two human hair. Skis chin

Norwegian FLIR E75 24O (FLIR SYSTEMSOü, Estonia) Insulation fur of the polar bears shown under the infrared heat imaging taken by SVALBARD Archipelago. Credit: © JON AARS, NORSK POLARINSTTT.

Julian Kaloran, a co -co -co -author of Trinity College, and a doctoral student student, said, “I found that when I was washed, I found that the adhesive strength had been greatly affected, so it is an important factor in giving this anti -uing effect. I jumped out. ” I said in a statement

“The unwashed, greasy hair has become much more difficult to stick with ice. In contrast, when the polar bears are washed and the grease is mostly removed, it functions like human hair. Even if the ice is washed, it will stick easily regardless of whether it is greasy. “

Cool compounding

After identifying hair grease as an important ingredient for maintaining ice from the fur of the polar bear, they performed detailed chemical analysis of sebum. They first identified important components-Cholesterol, diasylgricerol, and fatty acids。 This mixture makes the ice difficult to adhere to the fur.

However, the team was surprised to see that a fat metabolic was called. Squalene I was missing. Squalene is present in human hair and aquatic mammals. Including otter -I don’t live in ice, but I still need fur that keeps them warm. It is suggested that the absence of squalene in the polar bear is important from an anti -ice perspective.

In addition, it provides some insights of other methods that other animals who live in the extreme environment are adapted to avoid ice from fur and wings. for example, Gentoo Penguin Feathers structure Repel ice without a fat grease used by polar bears.

[ Related: Polar bears adapted to the Arctic just 70,000 years ago. ]

Grease as a hunting tool

This grease can also help explain the details of the hunting strategy of the polar bears and the indigenous Innute group. Polar bear Expanding “still hunting”, They are lying without moving next to the ice respiratory hole. So they wait for the seal to emerge.

“Hunting still develops into” aquatic stems “. Hakkyoku uses the hind legs to slide to the water to chase his prey, lower the adhesion of the ice, the less the noise generated, and the slide becomes faster and quieter. “

At Bergen University in Norway I said in a statement

Inuit people will also take subtle measures to imitate the hooking of polar bears. Their traditional fur preparations also protect sebum.

“In -uit hunting stools sometimes cover the portrogle fur on the feet to avoid noise when moving on ice, but people sometimes wear” polar bears “. Horst says that the fur is a bear to recover the optimal noise. ”

In addition to learning more about these adaptive masters, it will help you develop a new more secure material that distracts ice.

“We are more sustainable for these natural lipid coating generated by bears in” eternal chemicals “, which are a problematic” eternal chemical “, which is used as anti -ice coating. Hobbs is expected to help develop possible anti -wig coating, “said Hobbs.

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