期刊
ADVANCED MATERIALS
卷 34, 期 16, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202105416
关键词
anti-freezing; artificial nerve fibers; self-healing ionic hydrogels; ultra-stretchability
类别
资金
- National Natural Science Foundation of China [T2125003, 61875015, 82001982, 32101117]
- Beijing Natural Science Foundation [JQ20038, L212010]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA16021101]
Self-healing materials offer significant advantages in biomimetic intelligent robots by reducing safety hazards and economic losses caused by accidental damage. Researchers have developed a versatile ionic hydrogel with fast self-healing ability, ultra-stretchability, and stable conductivity, even in cryogenic environments. This hydrogel has been applied to create an artificial nerve fiber, demonstrating high fidelity and high throughput information interaction in extreme conditions.
Self-healing materials behave with irreplaceable advantages in biomimetic intelligent robots (BIR) for avoiding or reducing safety hazards and economic losses from accidental damage during service. However, the self-healing ability is unreservedly lost and even becomes rigid and fragile in the cryogenic environment where BIR are precisely needed. Here, the authors report a versatile ionic hydrogel with fast self-healing ability, ultra-stretchability, and stable conductivity, even at -80 degrees C. The hydrogel is systematically optimized to improve a hydrogen-bonded network nanostructure, coordinated achieving a quick self-healing ability within 10 min, large deformation tolerance of over 7000%, superior conductivity of 11.76 S cm(-1) and anti-freezing ability, which is difficult to obtain simultaneously. Such a hydrogel provides new opportunities for artificial electronic devices in harsh environments. As a prospective application, they fabricate an artificial nerve fiber by mimicking the structure and functions of the myelinated axon, exhibiting the property of fast and potential-gated signal transmission. This artificial nerve fiber is integrated into a robot for demonstrating a real-time high fidelity and high throughput information interaction under big deformation and cryogenic temperature. The hydrogel and bionic device will bring pioneering functions for robots and open a broad application scenario in extreme conditions.
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