State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
Adv Mater. 2018 Apr;30(14):e1706807. doi: 10.1002/adma.201706807. Epub 2018 Feb 14.
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.
生活在极寒环境中的动物，如北极熊，已经展示出了惊人的保暖能力，这得益于它们中空的毛发。在合成纤维中模仿这种策略将刺激智能纺织品实现高效的个人热管理，这对于防止热量损失和提高房屋取暖能耗效率都非常重要。在这里，使用“冷冻纺丝”技术来实现具有定向多孔结构的纤维的连续大规模制造，这种纤维模仿了北极熊的毛发，这是其他方法难以实现的。由这种仿生纤维编织而成的纺织品具有优异的隔热性能以及良好的透气性和穿着舒适性。除了被动地防止热量损失外，当掺杂诸如碳纳米管之类的电热材料时，这种纺织品还可以用作可穿戴加热器，以诱导快速的热响应和均匀的电热，同时保持其柔软和多孔的性质以实现舒适的穿着。
