Zebra-Patterned Stretchable Helical Yarn for Triboelectric Self-Powered Multifunctional Sensing

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.