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Mussel‐Inspired Flexible, Wearable, and Self‐Adhesive Conductive Hydrogels for Strain Sensors
Author(s) -
Lv Rui,
Bei Zhongwu,
Huang Yuan,
Chen Yangwei,
Zheng Zhiqiang,
You Qingliang,
Zhu Chao,
Cao Yiping
Publication year - 2020
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201900450
Subject(s) - self healing hydrogels , materials science , electrical conductor , soft robotics , adhesive , conductive polymer , nanotechnology , toughness , wearable computer , adhesion , composite material , polymer , actuator , computer science , polymer chemistry , embedded system , artificial intelligence , layer (electronics)
The latest generation of wearable devices features materials that are flexible, conductive, and stretchable, thus meeting the requirements of stability and reliability. However, the metal conductors that are currently used in various equipments cannot achieve these high performance expectations. Hence, a mussel‐inspired conductive hydrogel (HAC–B–PAM) is prepared with a facile approach by employing polyacrylamide (PAM), dopamine‐functionalized hyaluronic acid (HAC), borax as a dynamic cross‐linker agent, and Li + and Na + as conductive ions. HAC–B–PAM hydrogels demonstrate an excellent stretchability (up to 2800%), high tensile toughness (42.4 kPa), self‐adhesive properties (adhesion strength to porcine skin of 49.6 kPa), and good self‐healing properties without any stimuli at room temperature. Furthermore, the fabricated hydrogel‐based strain sensor is sensitive to deformation and can detect human body motion. Multifunctional hydrogels can be assembled into flexible wearable devices with potential applications in the field of electronic skin and soft robotics.