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Ultra-Wide Range, High Sensitivity Piezoresistive Sensor Based on Triple Periodic Minimum Surface Construction
Zhongming Li1, Dong Feng1, Bin Li1
1Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials, The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
This study introduces a novel triple periodic minimum surface (TPMS) structure sensor for high-sensitivity pressure detection. The flexible sensor achieves a wide detection range and durability, suitable for human activity and health monitoring.
Area of Science:
- Materials Science
- Mechanical Engineering
- Sensor Technology
Background:
- Flexible piezoresistive sensors with biological structures are crucial for sensitive detection.
- Conventional bionic pressure sensors face challenges balancing high sensitivity with a wide detection range.
Purpose of the Study:
- To propose a novel triple periodic minimum surface (TPMS) structure sensor.
- To overcome the limitations of conventional bionic sensors in sensitivity and detection range.
Main Methods:
- Parametric structural design and 3D printing techniques were employed.
- Finite element analysis was used to identify stress/strain distributions.
- The sensor's performance was evaluated for sensitivity, detection range, repeatability, durability, and detection limit.
Main Results:
- A TPMS structure sensor with 40.5% porosity demonstrated ultra-high sensitivity (132 kPa⁻¹ in 0-5.7 MPa) and a wide detection strain range (0-31.2%).
- The sensor exhibited excellent repeatability and durability over 1000 cycles and 10000 seconds.
- A low detection limit (1% at 80 kPa) was achieved, alongside superior compression durability.
Conclusions:
- The developed TPMS structure sensor effectively addresses the trade-off between sensitivity and detection range.
- The sensor shows potential for diverse applications including human activity recognition, health monitoring, and electromagnetic interference shielding.
- The synergistic effects of MWCNTs and MXene conductive networks enhance its utility.
