期刊
CHEMICAL ENGINEERING JOURNAL
卷 430, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.132779
关键词
Flexible sensors; Multi-functional hydrogel; Silver nanoparticles; Sustainability; UV-light shielding; Antibacterial activity
资金
- Open Fund of National Key Laboratory of Science and Technology on Advanced Composite [KZ42191814]
- National Key R&D Program of China [2017YFD0200302]
This study presents a high-performance and multi-functional hydrogel prepared by simple and green methods, with anti-freezing and anti-drying properties. Additionally, a gradient silver nanoparticles layer can be constructed in situ on the hydrogel surface to enhance sensing performance, making it suitable for assembling sensors to detect human motion.
To date, flexible sensors derived from hydrogel materials have been popularly adopted in the field of wearable electronic devices. It is urgent and prospective to create a high-performance and multi-functional hydrogel by simple and green methods to satisfy the various demands for long-term direct human contact. Herein, a sustainable physical double network hydrogel is prepared by natural glycyrrhizic acid (GL) and biocompatible polyvinyl alcohol (PVA) in water/glycerol solvent, which exhibits high mechanical properties, good biocompatible, anti-freezing and anti-drying ability. Inspired by the reducing abilities of GL, a gradient silver nanoparticles layer can be constructed in situ on the hydrogel surface without additional reducing agents. It not only affords the UV-light shielding and antibacterial effect for the hydrogel, but also effectively improves the sensing performance. The simultaneous realization of desired properties enables the hydrogel to be assembled into a sensor to detect all-dimensional human motion with high sensitivity, stability and durability. Benefiting from the renewable raw material, non-toxic reagent and facile preparation process, this work provides new insight and inspiration for the design of flexible sensors with high performance, multi-functionality and sustainability.
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