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Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
Published on: November 7, 2016
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Interface-engineered reduced graphene oxide assembly on nanofiber surface for high performance strain and temperature
Wei Xiao1, Ling Wang1, Bei Li2
1School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225002, China.
Journal of Colloid and Interface Science
|November 17, 2021
Summary
Scientists developed advanced conductive polymer nanofiber composites (CPNCs) with wrinkled reduced graphene oxide (RGO) shells for enhanced waterproof, durable, and sensitive wearable electronics. These materials show promise for body motion and temperature sensing applications.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Science
Background:
- Wearable sensing electronics demand materials with superior waterproof, durability, and multi-sensing capabilities.
- Existing conductive polymer nanofiber composites (CPNCs) face challenges in meeting these comprehensive performance requirements.
Purpose of the Study:
- To develop a novel multifunctional CPNC with enhanced properties for advanced wearable sensing applications.
- To improve waterproof, durability, and sensing sensitivity in CPNCs.
Main Methods:
- Fabrication of CPNCs using ultrasonication-induced decoration of wrinkled reduced graphene oxide (RGO) onto pre-stretched polyurethane (PU) nanofibers.
- Strain release post-decoration to induce RGO assembly and enhance surface roughness.
Main Results:
- Achieved a wrinkled RGO shell structure, significantly increasing hydrophobicity and surface roughness.
- Demonstrated high strain sensing sensitivity (gauge factor of 154.8 at 85%-100% strain) and excellent durability (>1000 cycles).
- Observed a negative temperature coefficient (NTC) effect, indicating potential for temperature sensing.
Conclusions:
- The developed wrinkled RGO-shelled CPNC offers a promising platform for high-performance, durable, and waterproof wearable sensors.
- The material exhibits potential for both body motion monitoring and high-performance temperature sensing applications.
