(Materials Horizons) Balancing the Mechanical, Electronic, and Self-healing Properties in Conductive Self-healing Hydrogel for Wearable Sensor Applications
作者：Gehong Su, Shuya Yin, Youhong Guo, Fei Zhao, Quanquan Guo, Xinxing Zhang, and Tao Zhou,* and Guihua* Yu
關鍵字：Self-healing, conductive, hydrogel, sensor, human-machine-interfaces
論文來源：期刊
具體來源：Materials Horizons, 2021, 8, 1795-1804
發表時間：2021年
Conductive self-healing hydrogels (CSHs) that
match the mechanical properties of biological tissues are highly desired for
emerging wearable electronics. However, It is still a fundamental challenge to
balance the trade-offs among the mechanical, electronic, and self-healing
properties in CSHs. Herein, we presented supramolecular double-network (DN)
CSHs by pre-infiltrating conductive polyaniline (PANI) precursor into the
self-healable hydrophobic association poly(acrylic acid) (HAPAA) hydrogel
matrix. The dynamic interfacial interactions between HAPAA and PANI networks efficiently
enhanced the mechanical performances of the HAPAA/PANI (PAAN) hydrogel and can
compensate for the negative effect of the enhanced mechanical strength on
self-healing. In addition, the interconnected PANI network endowed the PAAN
hydrogel with high conductivity and excellent sensory performances. As such,
the mechanical and electronic properties of PAAN hydrogel were simultaneously enhanced
significantly without compromising the self-healing performance of the HAPAA matrix,
achieving balanced mechanical, electronic, and self-healing properties in PAAN
hydrogel. Last, proof-of-concept applications like human
physiological monitoring electronics, flexible touch screen, and artificial electronic skin are
successfully demonstrated using PAAN hydrogel with the capability of restoring
their electronic performances after the healing process. It is anticipated that
such hydrogel network design can be extended into next-generation hydrogel
electronics for human-machine-interfaces and soft robotics.