Journal
MATERIALS TODAY PHYSICS
Volume 19, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtphys.2021.100404
Keywords
3D printing; Self-adhesive; Super-anti-freezing; Hydrogel; Human-machine interface
Funding
- Key-Area Research and Development Program of Guangdong Province [2020B090923003]
- Natural Science Foundation of Hunan [2020JJ3012]
- National Natural Science Foundation of China [52006056, 51722503]
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The 3D printed hydrogel has excellent stretchability, adhesive behavior, and anti-freezing ability, making it suitable for sensors, self-adhesive electrodes, and other applications, especially performing well in extreme low temperatures.
A 3D printed adhesive and conductive hydrogel with super-anti-freezing property is reported. This hydrogel exhibits excellent stretchability (elongation up to 3920%), outstanding adhesive behavior (adhesion strength up to 61 kPa), as well as marvelous anti-freezing ability (glass transition temperature as low as -96.3 degrees C). The present 3D printed hydrogel can be used as a sensor with a broad strain range to monitor human motions, slight physiological changes even at an extremely low temperature of -80 degrees C. Moreover, the hydrogel based self-adhesive electrodes can adhere to human skin directly to collect electrocardiogram, electro-oculogram and electromyogram signals accurately, promising the hydrogel electrodes to serve as a human-machine interface for controlling synchronized motion of anthropomorphic robots, exemplified by playing the piano. We also show that fingers of extraman can be precisely controlled via the self-adhesive hydrogel electrodes even at extremely low temperature of -80 degrees C. Therefore, the hydrogel fabricated by 3D printing is supposed to have promising potential applications in wearable devices, human-machine interactions, and intelligent bio-electronics, especially under harsh environmental conditions such as extreme low temperature. (C) 2021 Elsevier Ltd. All rights reserved.
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