A self-healing and conductive ionic hydrogel based on polysaccharides for flexible sensors

Yufei Wang; Zihao Chen; Rui Chen; Jie Wei

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A self-healing and conductive ionic hydrogel based on polysaccharides for flexible sensors

Full Length Article | Updated：2026-01-06

- A self-healing and conductive ionic hydrogel based on polysaccharides for flexible sensors
- Chinese Journal of Chemical Engineering Vol. 53, Issue 1, Pages: 73-82(2023)
- Affiliations：
  
  1. Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers,Beijing,China,100029
  2. Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education,Beijing,China,100029
  3. College of Materials Science and Engineering, Beijing University of Chemical Technology,Beijing,China,100029
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2023
- Accepted：
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Yufei Wang, Zihao Chen, Rui Chen, Jie Wei. A self-healing and conductive ionic hydrogel based on polysaccharides for flexible sensors[J]. Chinese Journal of Chemical Engineering, 2023, 53(1): 73-82.
DOI：

Yufei Wang, Zihao Chen, Rui Chen, Jie Wei. A self-healing and conductive ionic hydrogel based on polysaccharides for flexible sensors[J]. Chinese Journal of Chemical Engineering, 2023, 53(1): 73-82. DOI：

摘要

Abstract

In this study

we proposed a self-healing conductive hydrogel based on polysaccharides and Li

to serve as flexible sensors. At first

the oxidized sodium alginate (OSA) was obtained through the oxidation reaction of sodium alginate (SA). Then OSA

carboxymethyl chitosan (CMC)

and agarose (AGO) were dissolved in LiCl solution

respectively. Finally

the hydrogel was obtained through heating

mixing

and cooling processes. Because of the Schiff base structure and hydrogen bonding

the hydrogel demonstrates good mechanical and self-healing properties. The presence of Li

provides good conductivity for the hydrogel. In addition

we demonstrated the application of the hydrogel as the flexible sensors. It can perceive the process of pressing Morse code with the index finger as a pressure sensor and monitor sliding movement of the thumb as the strain sensor to browse the web with the mobile phone. Thus

the self-healing conductive hydrogel may have potential applications in flexible wearable sensors.

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