Ultraelastic Yarns from Curcumin-Assisted ELD toward Wearable Human-Machine Interface Textiles

Area of Science:

• Materials Science
• Wearable Electronics
• Nanotechnology

Background:

• Intelligent human-machine interfaces (HMIs) are crucial for the Internet of Things (IoT).
• Wearable electronics require advanced materials for seamless integration and functionality.
• Existing strain sensors often lack the required conductivity, stretchability, and durability.

Purpose of the Study:

• To develop a novel method for creating highly conductive and stretchable strain sensing yarns (SSSYs).
• To investigate the performance and durability of these SSSYs under various mechanical stresses.
• To demonstrate the application of SSSYs in wearable HMIs for gesture recognition and device control.

Main Methods:

• Curcumin-assisted electroless deposition technology was employed to create metal-coated conductive yarns.
• Isotropic deposition ensured uniform conductivity and structural integrity.
• Mechanical testing evaluated uniaxial elongation, cyclic stretching durability, and resistivity retention.
• Mechanics analysis was performed to understand strain sensing mechanisms.

Main Results:

• Achieved SSSYs with high conductivity (0.2 Ω cm^-1) and ultralight weight (1.5 mg cm^-1).
• Demonstrated exceptional stretchability (>1100% elongation) and durability (retaining low resistivity after 5000 cycles at 50% strain).
• Successfully applied SSSYs in wearable HMIs for gesture-controlled remote operation of a robotic hand and light manipulation.

Conclusions:

• The curcumin-assisted electroless deposition strategy offers a promising route for fabricating high-performance SSSYs.
• These SSSYs are suitable for advanced wearable HMIs, enhancing IoT and artificial intelligence applications.
• The developed technology paves the way for next-generation smart textiles and interactive electronic systems.