Highly stretchable and autonomously healable epidermal sensor based on multi-functional hydrogel frameworks

被引：212

作者：

Ge, Gang ^{[1
]}

Yuan, Wei ^{[1
]}

Zhao, Wen ^{[1
]}

Lu, Yao ^{[1
]}

Zhang, Yizhou ^{[1
]}

Wang, Wenjun ^{[2
]}

Chen, Peng ^{[3
]}

Huang, Wei ^{[1
,4
]}

Si, Weili ^{[1
]}

Dong, Xiaochen ^{[1
]}

机构：

[1] Nanjing Tech Univ, NanjingTech, IAM, KLOFE, 30 South Puzhu Rd, Nanjing 211800, Jiangsu, Peoples R China

[2] Liaocheng Univ, Sch Phys Sci & Informat Technol, Liaocheng 252059, Shandong, Peoples R China

[3] Nanyang Technol Univ, Innovat Ctr Flexible Devices, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore

[4] Northwestern Polytech Univ, SIFE, 127 West Youyi Rd, Xian 710072, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2019年 / 7卷 / 11期

关键词：

STRAIN SENSOR; ELASTOMER; TOUGH;

D O I：

10.1039/c9ta00641a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

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 (similar to 550%), remarkable healed strain (similar to 497% after 6 h) and high healing efficiency (similar to 90.4%). Self-remolding capacity to regain the mechanical performance is also presented, showing superb malleability. Low temperature (-25 degrees C) tolerance of the sensor is favorable for all-weather applications. In addition, the piezoresistive sensor has negligible electrical hysteresis, fast response (similar to 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.

引用

页码：5949 / 5956

页数：8

共 45 条

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