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Highly Stretchable, Resistance-Stable, Conductive Liquid Metal Core-Sheath Fibers Enable Ultrastable and
Yameng Wu1, Faqiang Wang1, Zongqian Wang2
1Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China.
Small (Weinheim an Der Bergstrasse, Germany)
|September 3, 2025
Summary
Researchers developed high-performance stretchable conductive fibers using styrene-butadiene-styrene and liquid metal. These novel fibers maintain conductivity under extreme strain and environmental conditions, advancing wearable electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Wearable Electronics
Background:
- Stretchable conductive fibers are crucial for wearable electronics.
- Existing materials often fail under strain, limiting applications.
- A need exists for robust, highly conductive fibers resistant to deformation.
Purpose of the Study:
- To develop a novel stretchable conductive fiber with enhanced mechanical and electrical properties.
- To investigate the synergistic effects of styrene-butadiene-styrene (SBS) and liquid metal (LM) in composite fibers.
- To demonstrate the potential of these fibers in advanced sensing applications.
Main Methods:
- Coaxial wet spinning technique used for fiber fabrication.
- Composite fiber prepared using styrene-butadiene-styrene (SBS) and liquid metal (LM).
- Characterization of tensile properties, electrical conductivity, and stability under various conditions.
Main Results:
- Achieved exceptional tensile characteristics (1860.32% strain, 27.58 MPa) and conductivity (4.14 × 10^4 S m^-1).
- Demonstrated remarkable resistance stability (105.31% variation under 800% strain) under repeated stress and harsh environments.
- SLMF exhibited high voltage output and stable performance under mechanical impacts.
- Integrated into triboelectric sensors for sensitive joint movement and respiratory monitoring.
Conclusions:
- The developed SBS/LM composite fiber (SLMF) offers superior stretchability and conductivity.
- SLMF shows excellent stability across diverse environmental and mechanical stresses.
- This technology provides a pathway for advanced skin-interfaced wearable electronics and sensors.
