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Title: Highly stretchable and autonomously healable epidermal sensor based on multi-functional hydrogel frameworks
Authors: Ge, Gang
Yuan, Wei
Zhao, Wen
Lu, Yao
Zhang, Yizhou
Wang, Wenjun
Chen, Peng
Huang, Wei
Si, Weili
Dong, Xiaochen
Keywords: Engineering::Chemical engineering
Issue Date: 2019
Source: Ge, G., Yuan, W., Zhao, W., Lu, Y., Zhang, Y., Wang, W., . . . Dong, X. (2019). Highly stretchable and autonomously healable epidermal sensor based on multi-functional hydrogel frameworks. Journal of Materials Chemistry A, 7(11), 5949–5956. doi:/10.1039/C9TA00641A
Journal: Journal of Materials Chemistry A
Abstract: A highly sensitive sensor platform is significant for human–machine interactions and healthcare applications due to its instantaneous monitoring of human physiological activities. However, current flexible sensors are confronted with liability to rupture, malfunction under subzero temperatures and deficient recyclability, posing great challenges to long-term implementation. Herein, a highly stretchable and healable somatosensory platform with excellent low temperature tolerance was demonstrated by adopting self-healing hydrogels as building blocks. Both metal-coordinated bonds and tetrahedral borate interactions within the binary-networked frameworks account for the satisfactory stretchability (∼550%), remarkable healed strain (∼497% after 6 h) and high healing efficiency (∼90.4%). Self-remolding capacity to regain the mechanical performance is also presented, showing superb malleability. Low temperature (−25 °C) tolerance of the sensor is favorable for all-weather applications. In addition, the piezoresistive sensor has negligible electrical hysteresis, fast response (∼31 ms) and electrically self-healable behavior. Various human motions (e.g., finger bending, phonation, and limb activity) can be differentiated by this hydrogel-based sensor.
ISSN: 2050-7488
DOI: 10.1039/C9TA00641A
Rights: © 2019 The Royal Society of Chemistry. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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