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Related Experiment Video

Updated: Nov 6, 2025

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A NIR laser induced self-healing PDMS/Gold nanoparticles conductive elastomer for wearable sensor.

Kaiming Zhang1, Junhao Zhang2, Yuetao Liu1

  • 1State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.

Journal of Colloid and Interface Science
|May 7, 2021
PubMed
Summary

This study introduces a novel self-healing conductive elastomer using dynamic gold cross-linking for enhanced ductility and rapid repair. The developed material shows promise for wearable sensors and health monitoring applications.

Keywords:
Conductive elastomerGold nanoparticlesPolysiloxaneSelf-healingStrain sensor

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Self-healing conductive elastomers are crucial for smart electronic devices like wearable sensors.
  • Challenges exist in developing elastomers with rapid repair and high ductility due to nano filler interference with polymer flow.

Purpose of the Study:

  • To develop a self-healing conductive elastomer with improved ductility and rapid repair capabilities.
  • To explore the use of dynamic S-Au interactions for creating a robust and repairable material.

Main Methods:

  • Grafting thioctic acid (TA) onto amino-modified polysiloxane (PDMS-NH2) via dehydration condensation.
  • Introducing gold nanoparticles to construct a dynamic network based on sulfur-gold (S-Au) interactions.
  • Evaluating the elastomer's performance as a strain sensor for monitoring human joint bending and muscle activity.

Main Results:

  • The dynamic gold cross-linking effectively dissipated energy, enhancing the elastomer's extensibility.
  • The S-Au interaction enabled rapid self-healing under near-infrared (NIR) irradiation with 92% repair efficiency.
  • The conductive elastomer accurately detected human joint movements and subtle muscle state changes.

Conclusions:

  • A self-healable conductive elastomer based on dynamic S-Au interactions was successfully developed.
  • The material exhibits excellent extensibility, rapid optothermal self-healing, and sensitive strain-sensing capabilities.
  • This elastomer holds significant potential for applications in human-computer interaction and health monitoring.