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Researchers developed a highly stretchable helical yarn from carbon nanotube/polyurethane nanofibers. This smart textile acts as both a self-powered sensor and an energy harvester for wearable electronics.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Textile Engineering

Background:

  • Smart textiles require efficient energy harvesting and sensing capabilities for advanced portable electronics.
  • Challenges remain in developing novel energy-harvesting models and improving fiber-material interfaces.

Purpose of the Study:

  • To create a highly stretchable triboelectric helical yarn (TEHY) inspired by natural vine structures.
  • To investigate the TEHY's potential as both an energy harvester and a multifunctional sensor.

Main Methods:

  • Manufacturing a TEHY by twisting a carbon nanotube/polyurethane nanofiber (CNT/PU NF) Janus membrane.
  • Designing the yarn with a zebra-stripe pattern of conductive CNTs and insulative PU NFs.
  • Evaluating the TEHY's mechanical and electrical stability through stretch-release tests.

Main Results:

  • The TEHY demonstrated a self-frictional triboelectric effect due to its unique patterned interfaces.
  • The helical geometry and PU matrix provided superelasticity and stable output after 1000 cycles.
  • The yarn functioned effectively as a mechanical energy harvester and a real-time sensor for stimuli and physiological activities.

Conclusions:

  • The developed TEHY offers a promising solution for next-generation smart fabrics and wearable power supplies.
  • Its robust performance highlights versatile applications in human-machine interactions and portable electronics.
  • The study addresses key challenges in smart textile development through innovative material design.