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Issue 12, 2020
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Stimuli-responsive micro/nanoporous hairy skin for adaptive thermal insulation and infrared camouflage

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Abstract

Hairs in homeothermic animals have multiple functions essential for survival, such as regulation of body temperature and camouflage, through adaptable reconfiguration in response to external environments. By contrast, humans wear clothes because the human skin is ineffective for thermoregulation and camouflage, but clothes do not exhibit dynamic responsiveness. In this work, we demonstrate a smart reconfigurable hairy skin based on a hair-patterned shape memory polymer (SMP) containing hierarchical porous micro/nanostructures, which has unique functions of dynamically responsive thermal insulation and camouflage from infrared surveillance. The hairy SMP exhibits high thermal insulation due to the long tortuous path of thermal transport in the micro/nanopores. The programmable shape of the hairy SMP enables the reversible reconfiguration of the hair geometry in response to temperature, leading to the dynamic control of thermal insulation by more than 61.4%. As a proof-of-concept, the smart hairy skin can be used as wearable thermal camouflage or thermal encryption films.

Graphical abstract: Stimuli-responsive micro/nanoporous hairy skin for adaptive thermal insulation and infrared camouflage

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Submitted
31 Aug 2020
Accepted
12 Oct 2020
First published
13 Oct 2020

Mater. Horiz., 2020,7, 3258-3265
Article type
Communication

Stimuli-responsive micro/nanoporous hairy skin for adaptive thermal insulation and infrared camouflage

A. Choe, J. Yeom, Y. Kwon, Y. Lee, Y. Shin, J. Kim and H. Ko, Mater. Horiz., 2020, 7, 3258
DOI: 10.1039/D0MH01405B

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