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Bioinspired Superelastic Electroconductive Fiber for Wearable Electronics.

Jianhua Wu, Zhiyong Wang, Wei Liu1

  • 1College of Fashion Technology , Shanghai University of Engineering Science , Shanghai 201620 , P. R. China.

ACS Applied Materials & Interfaces
|October 31, 2019
PubMed
Summary

Researchers developed a superelastic electroconductive fiber (E-fiber) using carbon nanotube composites. This novel E-fiber offers superior stretchability and durability for advanced smart textiles and wearable electronics.

Keywords:
CNT yarnbioinspiredcompositespring-like structuresuperelasticwearable conducting fiberwrapping

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Area of Science:

  • Materials Science
  • Textile Engineering
  • Nanotechnology

Background:

  • Smart textiles require flexible and elastic electroconductive fibers (E-fibers) for wearable electronics.
  • Current metal-based conductive wires lack the necessary stretchability and anti-abrasion properties for practical applications.
  • Existing solutions fail to meet the demands for comfort and reliable performance in dynamic environments.

Purpose of the Study:

  • To engineer a superelastic and electroconductive fiber with enhanced mechanical and electrical properties.
  • To overcome the limitations of traditional conductive materials in wearable electronic applications.
  • To develop a novel E-fiber inspired by natural structures for improved performance and wearability.

Main Methods:

  • Fabrication of an electroconductive fiber by coiling a carbon nanotube/polydimethylsiloxane (CNT/PDMS) composite yarn around a polyester filament.
  • Inspiration from the spring-like coiled tendril structures of climbing plants for the fiber design.
  • Characterization of the fiber's mechanical properties (stretchability, tensile force, anti-abrasion) and electrical performance under deformation.

Main Results:

  • The developed E-fiber exhibits high stretchability (165%) and exceptional tensile force (660 cN).
  • Demonstrated extraordinary anti-abrasion ability and remarkable electrical stability across various deformations.
  • Achieved excellent air permeability and electrothermal stability, crucial for comfortable and reliable wearable applications.

Conclusions:

  • The novel spring-like E-fiber, utilizing a CNT composite wrapping yarn, offers a significant advancement over conventional conductive fibers.
  • Its superior mechanical robustness, elasticity, and electrical integrity make it highly suitable for demanding wearable electronic systems.
  • This material presents promising prospects for practical integration into next-generation smart textiles and electronic devices.