Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 205, Issue -, Pages 491-499Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.02.065
Keywords
Stretchable; Self-healing; Okra polysaccharide-based hydrogel; Sandwich structure; Strain sensor
Funding
- National Natural Science Foundation of China [51763009, 51605109]
- Guangxi Major Science and Technology projects [AA18242010, AA18242008]
- Innovation Project of Guangxi Graduate Education [YCBZ2021064]
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This study reports a sandwich-structure sensor based on biomucopolysaccharide hydrogel, which exhibits excellent stretchability, self-healing ability, high sensitivity, short response time, and good working stability. It provides innovative ideas for the development of biopolysaccharide hydrogels for sensor applications.
Self-healing conductive hydrogels have attracted widespread attention as a new generation of smart wearable devices and human motion monitoring sensors. To improve the biocompatibility and degradability of such strain sensors, we report a sensor with a sandwich structure based on a biomucopolysaccharide hydrogel. The sensor was constructed with a stretchable self-healing hydrogel composed of polyvinyl alcohol (PVA), okra polysaccharide (OP), borax, and a conductive layer of silver nanowires. The obtained OP/PVA/borax hydrogel exhibited excellent stretchability (similar to 1073.7%) and self-healing ability (93.6% within 5 min), and the resultant hydrogel-based strain sensor demonstrated high sensitivity (gauge factor = 6.34), short response time (similar to 20 ms), and good working stability. This study provides innovative ideas for the development of biopolysaccharide hydrogels for applications in the field of sensors.
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