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A flexible, stretchable and wearable strain sensor based on physical eutectogels for deep learning-assisted motion
Dandan Liu1, Shiyu Wang1, Hui Wang2
1College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P. R. China. whb6985@scu.edu.cn.
Journal of Materials Chemistry. B
|June 5, 2024
Summary
Lignin enhances physical eutectogels for wearable strain sensors, improving conductivity and mechanical properties. These advanced materials enable highly sensitive motion detection and accurate gesture recognition.
Area of Science:
- Materials Science
- Polymer Chemistry
- Wearable Electronics
Background:
- Physical eutectogels are promising conductive gels for electronics but suffer from poor mechanical strength, adhesion, self-healing, and conductivity.
- These limitations hinder their application in advanced wearable strain sensors.
Purpose of the Study:
- To develop lignin-reinforced physical eutectogels (DESL) with enhanced properties for wearable strain sensors.
- To investigate the potential of these eutectogels in motion detection and gesture recognition systems.
Main Methods:
- Dissolving lignin in a deep eutectic solvent (DES) of acrylic acid (AA) and choline chloride.
- Polymerizing AA to form lignin-reinforced physical eutectogels (DESL).
- Fabricating wearable strain sensors using the prepared DESL materials.
Main Results:
- DESL eutectogels demonstrated good transparency, UV shielding, mechanical strength, self-adhesion, self-healing, and high conductivity.
- Wearable strain sensors exhibited a wide working range (0-1500%), high sensitivity (GF = 18.15), and excellent stability (1000 cycles).
- A gesture recognition system achieved 98.8% accuracy when combining DESL sensors with deep learning.
Conclusions:
- Lignin-reinforced physical eutectogels offer an innovative approach to creating multifunctional materials for advanced wearable electronics.
- The developed strain sensors show significant potential for diverse human motion detection and sophisticated human-computer interaction applications.
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