March 29, 2024

New bionic insulation material structure similar to polar bear hair

The reporter learned from the University of Science and Technology of China that Professor Yu Shuhong's research team at the school's Department of Chemistry mimics the hollow structure of a single polar bear hair and extends it to a bulk material composed of many hairs. The research results were published in the journal "Chemistry" under Cell Publishing House on June 6.

“The polar bear ’s hair has been evolved to improve its insulation in cold and humid environments, which makes it an ideal model for synthetic insulation materials. By assembling synthetic carbon fiber, we can design an elastic Lightweight material, this material will not significantly aging within the service life, and can absorb heat. "Yu Shuhong said.

Unlike the hair of humans or other mammals, the polar bear's hair is hollow, and each hair has a cavity structure. The shape and spacing of these cavities form their unique white shell. In fact, the polar bear's hair is transparent, and the light is reflected inside, causing glow to appear like white. At the same time, it also gives them significant thermal insulation and hydrophobicity, suitable for artificial thermal insulation materials to follow.

"The hollow core restricts thermal convection, and the hollow structure also makes a single hair lighter, which is one of the most prominent advantages in materials science," said Liu Jianwei, an associate professor at the University of Science and Technology of China, who simulated millions of hollow cores. Carbon tubes, each carbon tube is equivalent to a polar bear hair, and they are wrapped around aerogel like macaroni.

The researchers found that the bionic hollow tube, inspired by the polar bear hair, showed light weight, heat insulation, and was almost unaffected by water-this is a polar bear that can keep it warm while swimming, but also keep it insulated under wet conditions Sexual convenience. Another benefit is that this new material is super elastic compared to polar bear hair, which further improves its applicability in engineering.

The researchers focused on the relevant industrial use of this material, and the next step is to expand the current production of this insulation material from the centimeter scale to the meter scale. And explore its application in extreme conditions such as aerospace. (Reporter Wu Changfeng)

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