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

Abstract

Hairs in homeothermic animals have multiple funcitons 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 camouflages or thermal encryption films.

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Supplementary files

Article information


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

Mater. Horiz., 2020, Accepted Manuscript
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, Accepted Manuscript , DOI: 10.1039/D0MH01405B

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