4.8 Article

A Thermally Insulating Textile Inspired by Polar Bear Hair

期刊

ADVANCED MATERIALS
卷 30, 期 14, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201706807

关键词

biomimetic; personal thermal management; thermally insulating textile; thermal stealth; wearable electronics

资金

  1. National Natural Science Foundation of China [51722306, 51603182, 21674098]
  2. State Key Laboratory of Chemical Engineering [SKL-ChE-16T02]
  3. National Key Research and Development Program of China [2017YFC1103900]
  4. 1000 Youth Talents Plan of China

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Animals living in the extremely cold environment, such as polar bears, have shown amazing capability to keep warm, benefiting from their hollow hairs. Mimicking such a strategy in synthetic fibers would stimulate smart textiles for efficient personal thermal management, which plays an important role in preventing heat loss and improving efficiency in house warming energy consumption. Here, a freeze-spinning technique is used to realize continuous and large-scale fabrication of fibers with aligned porous structure, mimicking polar bear hairs, which is difficult to achieve by other methods. A textile woven with such biomimetic fibers shows an excellent thermal insulation property as well as good breathability and wearability. In addition to passively insulating heat loss, the textile can also function as a wearable heater, when doped with electroheating materials such as carbon nanotubes, to induce fast thermal response and uniform electroheating while maintaining its soft and porous nature for comfortable wearing.

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