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Biodegradable Chitosan-Based Stretchable Electronics with Recyclable Silver Nanowires.

Mesbah Ahmad1,2, Darpan Shukla3, Yong Zhu3

  • 1Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States.

ACS Applied Materials & Interfaces
|February 19, 2025
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Summary
This summary is machine-generated.

Researchers developed biodegradable soft electronic circuits using plasticized chitosan and recyclable silver nanowires. These flexible, stretchable circuits offer tunable properties and can be biodegraded, with reusable conductive materials for sustainable applications.

Keywords:
biodegradable electronicschitosan filmssilver nanowiressoft circuitsstretchable electronicssustainable electronic materialswearable sensors

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Area of Science:

  • Biomaterials Engineering
  • Soft Electronics
  • Sustainable Technology

Background:

  • Chitosan is a biocompatible and biodegradable material ideal for biomedical and wearable applications.
  • Current soft electronics require sustainable solutions for material recycling and substrate biodegradation.
  • Integrating functional electronic circuits into human interfaces necessitates adaptable and eco-friendly materials.

Purpose of the Study:

  • To develop and characterize biodegradable soft electronic circuits.
  • To utilize plasticized chitosan as a flexible and stretchable substrate.
  • To incorporate recyclable silver nanowires (AgNWs) for conductive wiring.

Main Methods:

  • Fabrication of soft electronic circuits using glycerol-plasticized chitosan and AgNWs.
  • Characterization of the mechanical, electrical, and degradation properties of the composite material.
  • Demonstration of device functionality using strain and electromyography (EMG) sensors.

Main Results:

  • The chitosan substrate exhibited tunable mechanical properties with up to 116% stretchability, transparency, and breathability.
  • Glycerol plasticization enhanced the flexibility and stretchability of the AgNW-chitosan-glycerol (AgNW-Chi-Gly) composite.
  • The AgNWs provided high conductivity, enabling functional strain and EMG sensors.
  • The chitosan substrate demonstrated controlled biodegradation, and AgNWs were successfully recycled.

Conclusions:

  • Biodegradable soft electronic circuits were successfully developed using plasticized chitosan and AgNWs.
  • The developed circuits offer a sustainable platform for soft electronics with tunable properties and recyclability.
  • This approach addresses the need for eco-friendly materials in wearable technology and biomedical engineering.