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  11. Starch/ionic Liquid/hydrophobic Association Hydrogel With High Stretchability, Fatigue Resistance, Self-recovery And Conductivity For Sensitive Wireless Wearable Sensors

Starch/ionic liquid/hydrophobic association hydrogel with high stretchability, fatigue resistance, self-recovery and conductivity for sensitive wireless wearable sensors

Jingmin Shen1, Lu Lu1, Rongtong He1

  • 1State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong 250353, China.

Carbohydrate Polymers
|September 8, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

This study developed a versatile starch-based hydrogel for wearable electronics. The new material offers high stretchability, conductivity, and durability, enabling advanced sensing applications.

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biotechnology

Background:

  • Conductive hydrogels are crucial for wearable electronics, with a growing need for sustainable, biocompatible options.
  • Starch-based hydrogels show promise but often lack the required stretchability, conductivity, durability, and sensitivity for advanced applications.
  • Developing multifunctional biopolymer-based hydrogels remains a significant challenge in materials science.

Purpose of the Study:

  • To create a versatile, high-performance starch-based hydrogel for wearable electronic sensors.
  • To enhance mechanical properties, conductivity, self-recovery, and durability using amylopectin and ionic liquids.
  • To investigate the structure-property relationships and demonstrate the hydrogel's application in wireless wearable sensors.

Main Methods:

Keywords:
AmylopectinHydrogelHydrophobic associationIonic liquid

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  • Incorporation of amylopectin and ionic liquid into a hydrophobic association hydrogel network.
  • Characterization of mechanical properties, including elongation, Young's modulus, and toughness.
  • Evaluation of electrical properties, such as conductivity and electrical self-healing capabilities.
  • Testing of sensor performance for monitoring joint motion and facial expressions.

Main Results:

  • The hydrogel achieved an impressive 2540% elongation, 1.8 S·m⁻¹ conductivity, and a gauge factor of 26.85.
  • Demonstrated excellent self-recovery, electrical self-healing, and durability over 5850 cycles.
  • Synergistic effects of amylopectin and ionic liquid were linked to hydrophobic association, H-bonding, and electrostatic interactions.
  • A wireless wearable sensor prototype accurately monitored joint movements and expression changes.

Conclusions:

  • Amylopectin and ionic liquid introduction successfully created a multifunctional starch-based hydrogel with superior properties.
  • The developed hydrogel is a promising candidate for high-performance, flexible wearable sensors.
  • This work highlights the potential of biopolymer-based materials in advancing wearable electronic technology.
Wearable sensors