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Soft, Super-Elastic, All-Polymer Piezoelectric Elastomer for Artificial Electronic Skin
Youjun Guan1, Lingjie Tu1, Kunyu Ren1
1School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou510006, P. R. China.
ACS Applied Materials & Interfaces
|December 26, 2022
Summary
Researchers developed a novel piezoelectric polymer elastomer for artificial electronic skin. This soft, stretchable material exhibits high sensitivity and excellent mechanical properties, enabling real-time detection of subtle external pressures.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Piezoelectric sensors are crucial for wearable devices, mimicking human skin functions.
- Developing soft piezoelectric materials with high sensitivity, stretchability, and elasticity remains a challenge.
Purpose of the Study:
- To create a soft, skin-like piezoelectric polymer elastomer with enhanced performance.
- To investigate the material's potential for artificial electronic skin applications.
Main Methods:
- Synthesized a composite elastomer using poly(vinylidene fluoride) (PVDF) and polyacrylonitrile via radical polymerization and freeze-drying.
- Utilized dipole-dipole interactions to induce PVDF phase transition (α to β phase) for improved properties.
Main Results:
- Achieved a high piezoelectric coefficient (d33max = 63 pC/N) and excellent stretchability (211.3-259.3%).
- Demonstrated super compressibility (99% strain) and super elasticity (100% recovery).
- Generated significant electrical output (Vocmax = 253 mV) with rapid response (15 ms).
Conclusions:
- The developed elastomer exhibits superior mechanical and electrical properties for artificial electronic skin.
- The material accurately detects physiological signals like gestures, throat vibrations, and pulse waves.
- This advancement facilitates real-time sensing of subtle external pressures.
