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Shear Thickening Fluid and Sponge-Hybrid Triboelectric Nanogenerator for a Motion Sensor Array-Based Lying State
Youngsu Kim1, Inkyum Kim1, Maesoon Im2,3,4
1Department of Electronics and Information Convergence Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin 17104, Republic of Korea.
Materials (Basel, Switzerland)
|July 27, 2024
Summary
Triboelectric nanogenerator (TENG) sensors utilizing shear thickening fluid (STF) offer a battery-free solution for IoT devices. This technology enables advanced medical monitoring, like pressure ulcer prevention, by detecting patient motion.
Area of Science:
- Materials Science
- Nanotechnology
- Energy Harvesting
Background:
- Internet of Things (IoT) devices face challenges with size and power consumption.
- Triboelectricity-driven energy harvesting offers a solution by generating power without external sources.
- Shear thickening fluid (STF) can modulate the sensitivity of triboelectric nanogenerator (TENG) sensors.
Purpose of the Study:
- To develop and evaluate a STF and sponge-hybrid TENG (SSH-TENG) for enhanced energy harvesting.
- To implement the SSH-TENG as a hybrid triboelectric motion sensor (HTMS) for medical applications.
- To demonstrate the potential of HTMS for real-time patient monitoring and pressure ulcer prevention.
Main Methods:
- Fabrication of SSH-TENG devices utilizing STF.
- Characterization of electrical outputs (open-circuit voltage, short-circuit current, power density) under varying conditions.
- Integration of SSH-TENG arrays into an HTMS for a lying state detection system in medical settings.
Main Results:
- Achieved an open-circuit voltage of 98 V and short-circuit current of 4.5 µA.
- Determined a maximum power density of 0.853 mW/m² at 30 MΩ load resistance.
- Successfully implemented an HTMS array for real-time patient motion monitoring and hazardous situation alerts.
Conclusions:
- SSH-TENG technology effectively addresses IoT size and power constraints.
- The developed HTMS demonstrates significant potential for continuous patient monitoring and preventative healthcare.
- This technology can aid in early detection of hazardous situations and contribute to pressure ulcer prevention.
