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Related Concept Videos

  1. Home
  3. Research Domains
  5. Engineering
  7. Materials Engineering
  9. Wearable Materials
  11. Silk Fibroin-based Hydrogels With Low Hysteresis, Self-adhesion, And Tunable Ionic Conductivity For Wearable Devices.
  1. Home
  3. Research Domains
  5. Engineering
  7. Materials Engineering
  9. Wearable Materials
  11. Silk Fibroin-based Hydrogels With Low Hysteresis, Self-adhesion, And Tunable Ionic Conductivity For Wearable Devices.

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Silk fibroin-based hydrogels with low hysteresis, self-adhesion, and tunable ionic conductivity for wearable devices.

Kewei Zhao1, Jingliu Wang2, Yue Wu2

  • 1School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, China; Shandong Provincial Engineering Research Center of Novel Pharmaceutical Excipients and Controlled Release Preparations, College of Health & Medicine, Dezhou University, Dezhou, China.

International Journal of Biological Macromolecules
|March 2, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

This study developed a novel triple-network hydrogel using silk fibroin (SF) for advanced wearable electronics. The innovative pH-regulated fabrication enhances conductivity, elasticity, and adhesion for sensitive human movement detection.

Keywords:
HydrogelInterface adhesionLow hysteresisZwitterionic macromolecule

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Silk fibroin (SF) hydrogels offer biocompatibility and functionalization potential for flexible electronics.
  • Challenges exist in creating SF-based hydrogels with combined low hysteresis, self-adhesion, high elasticity, and high sensitivity for wearable devices.

Purpose of the Study:

  • To develop a novel, multi-functional silk fibroin-based hydrogel for high-performance wearable electronic applications.
  • To address limitations in existing SF hydrogels by enhancing mechanical, electrical, and adhesive properties.

Main Methods:

  • A one-step preparation of a triple-network hydrogel using polyacrylamide (PAM), methyl cellulose (MC), and SF.
  • Precursor solution pH pre-regulation to control network cross-linking, hydrogen bonding, and interfacial properties.
  • Incorporation of MC to improve ion transport and hydrogel conductivity.

    • Main Results:

    • Achieved reduced hysteresis (21.4% to 7.2%), increased conductivity (0.34 to 0.57 S·m⁻¹), enhanced elastic modulus (18.6 to 58.9 kPa), and improved adhesion (4.5 to 15.48 kPa).
    • Demonstrated a self-adhesive, multi-channel, wireless detection system for human movements using the SF hydrogel.
    • The hydrogel exhibited potential for electrocardiogram monitoring, electromyogram detection, and self-powered devices.

    Conclusions:

    • The developed triple-network SF hydrogel offers a synergistic enhancement of mechanical, electrical, and adhesive properties.
    • This method provides new insights for designing advanced natural polymer-based hydrogels for wearable electronics.
    • The SF hydrogel shows significant promise for various biomedical sensing and energy harvesting applications.