Self-Healing Hydrogel Bioelectronics

Zhikang Li

doi:10.1002/adma.202306350

Self-Healing Hydrogel Bioelectronics

2024-02-12

28

PRE

AI

Zhang Shiming (Shiming Zhang) *

Z

Zhuangde Jiang

DOI：10.1002/adma.202306350

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Hydrogels have emerged as powerful building blocks to develop various soft bioelectronics because of their tissue-like mechanical properties, superior bio-compatibility, the ability to conduct both electrons and ions, and multiple stimuli-responsiveness. However, hydrogels are vulnerable to mechanical damage, which limits their usage in developing durable hydrogel-based bioelectronics. Self-healing hydrogels aim to endow bioelectronics with the property of repairing specific functions after mechanical failure, thus improving their durability, reliability, and longevity. This review discusses recent advances in self-healing hydrogels, from the self-healing mechanisms, material chemistry, and strategies for multiple properties improvement of hydrogel materials, to the design, fabrication, and applications of various hydrogel-based bioelectronics, including wearable physical and biochemical sensors, supercapacitors, flexible display devices, triboelectric nanogenerators (TENGs), implantable bioelectronics, etc. Furthermore, the persisting challenges hampering the development of self-healing hydrogel bioelectronics and their prospects are proposed. This review is expected to expedite the research and applications of self-healing hydrogels for various self-healing bioelectronics. Self-healing hydrogels (SHHs) can endow soft bioelectronics with skin-mimic function, i.e. repairing their physical, electrical and chemical properties after damage, which improves the device durability, reliability, and longevity. This review discusses recent advances in SHHs, from the self-healing mechanisms to a summary of various SHH-based bioelectronics, and proposes the challenges and prospects. It is expected to expedite the research and applications of SHHs for various self-healing bioelectronics. image .

Keyword:

self-healing hydrogels

self-healing mechanisms

wearable sensors

soft display devices

flexible supercapacitors

flexible TENGs

implantable bioelectronics

Self-Healing Hydrogel Bioelectronics

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