Journal
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 106, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.msec.2019.110168
Keywords
Hydrogel; Flexible strain sensors; Stretchability; Self-healing; Adhesion
Categories
Funding
- National Natural Science Foundation of China [51703012, 81873216]
- Science and Technology Department of Jilin Province [20180101207JC]
- Education Department of Jilin Province [JJKH20191296KJ, JJKH20191306KJ]
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Nowadays, hydrogels have been intensively explored due to their promising potential application in bioelectronics. However, the lack of self-healing performance limits the lifespan and stability of materials. Here, a stretchable, self-healing and conductive hydrogel is prepared via physical crosslinking including hydrogen bonding, hydrophobic association and complexation effect, endowing the hydrogels with stretchability of 1150%, tensile strength of 112 kPa, flexibility and puncture resistance. Besides, the hydrogels possess extraordinary conductive property with a conductivity of 0.0720 S cm(-1) and exhibit stable changes of resistance signals with a gauge factor of 2.506. Meanwhile, the hydrogels also exhibit adhesive performance due to the presence of catechol groups, and the maximum peeling adhesive strength could reach 23 N m(-1). It is envisioned that the highly stretchable, self-healable, adhesive and conductive hydrogels would widen the application as the flexible strain sensors for soft robots, artificial limb, movement-monitoring equipment.
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