Organic-Inorganic Hydrogel Strain Sensors Based on Methacryloyl Ethoxy Trimethyl Ammonium Chloride and Bentonite

Xiao-Ya Wang; Jing-Jing Bai; Tian-Jia Yang; Xu-Dong Yu

doi:10.1007/s10118-025-3407-6

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Organic-Inorganic Hydrogel Strain Sensors Based on Methacryloyl Ethoxy Trimethyl Ammonium Chloride and Bentonite

RESEARCH ARTICLE | Updated：2025-09-26

- Organic-Inorganic Hydrogel Strain Sensors Based on Methacryloyl Ethoxy Trimethyl Ammonium Chloride and Bentonite
- Chinese Journal of Polymer Science Vol. 43, Issue 10, Pages: 1904-1916(2025)
- Affiliations：
  
  Hebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface, and College of Science, Hebei University of Science and Technology, Shijiazhuang 050080, China
- Author bio：
  
  chemyxd@173.com
- Funds：
- DOI：10.1007/s10118-025-3407-6
  CLC：
- Received：09 May 2025，
  
  Revised：2025-06-27，
  
  Accepted：30 June 2025，
  
  Online First：10 September 2025，
  
  Published：05 October 2025
- Accepted：
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Wang, X. Y.; Bai, J. J.; Yang, T. J.; Yu, X. D. Organic-inorganic hydrogel strain sensors based on methacryloyl ethoxy trimethyl ammonium chloride and bentonite. Chinese J. Polym. Sci. 2025, 43, 1904–1916

Xiao-Ya Wang, Jing-Jing Bai, Tian-Jia Yang, et al. Organic-Inorganic Hydrogel Strain Sensors Based on Methacryloyl Ethoxy Trimethyl Ammonium Chloride and Bentonite[J]. Chinese Journal of Polymer Science, 2025, 43(10): 1904-1916.
Wang, X. Y.; Bai, J. J.; Yang, T. J.; Yu, X. D. Organic-inorganic hydrogel strain sensors based on methacryloyl ethoxy trimethyl ammonium chloride and bentonite. Chinese J. Polym. Sci. 2025, 43, 1904–1916 DOI： 10.1007/s10118-025-3407-6.

Xiao-Ya Wang, Jing-Jing Bai, Tian-Jia Yang, et al. Organic-Inorganic Hydrogel Strain Sensors Based on Methacryloyl Ethoxy Trimethyl Ammonium Chloride and Bentonite[J]. Chinese Journal of Polymer Science, 2025, 43(10): 1904-1916. DOI： 10.1007/s10118-025-3407-6.

摘要

This work presents bentonite-based hybrid hydrogel strain sensors with outstanding mechanical and strain-sensing performance

which is achieved through highly matched interfaces mediated by supramolecular interactions.

Abstract

Flexible wearable electronic devices based on hydrogels have immense potential in a wide range of applications. However

many existing strain sensors suffer from significant limitations including poor mechanical properties

low adhesion

and insufficient conductivity. To address these challenges

this study successfully developed an organic-inorganic double-network conductive hydrogel using acrylic-modified bentonite (AABT) as a key component. The incorporation of AABT significantly enhanced the mechanical properties of the ATHG@LiCl hydrogel

achieving an impressive stretchability of 4000% and tensile strength of 250 kPa. Moreover

it improved the electrical conductivity of the hydrogel to a maximum of 1.53 mS/cm. The catechol structure of tannic acid (TA) further augmented the adhesive properties of the ATHG@LiCl hydrogel toward various substrates such as copper

iron

glass

plastic

wood

and pigskin. The addition of lithium chloride (LiCl) and dimethyl sulfoxide (DMSO) endowed the hydrogel with exceptional freezing resistance and flexibility

even at low temperatures of −20 °C. Remarkably

the hydrogel maintained a conductivity of 0.53 mS/cm under these conditions

surpassing the performance of many other reported hydrogels. Furthermore

the ATHG@LiCl hydrogel demonstrated outstanding characteristics

such as high sensitivity (gauge factor GF=4.50)

excellent transparency (90%)

and reliable strain-sensing capabilities

indicating that the ATHG@LiCl hydrogel is a highly promising candidate for flexible wearable soft materials

offering significant advancements in both functionality and performance.

关键词

Keywords

references

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