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Bioinspired Gradient Stretchable Aerogels for Ultrabroad-Range-Response Pressure-Sensitive Wearable Electronics and
Xiaoyu Zhang1, Zhenyu Hu1, Qi Sun1
1Interdisciplinary Materials Research Center, Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, P.R. China.
Angewandte Chemie (International Ed. in English)
|November 8, 2022
Summary
Researchers developed novel wearable electronics using bioinspired nanocomposite aerogels. These superelastic devices offer an ultrabroad pressure detection range and exceptional durability for advanced electronic skin applications.
Area of Science:
- Materials Science
- Nanotechnology
- Wearable Electronics
Background:
- Development of broad-range-response pressure-sensitive wearable electronics is challenging.
- Existing flexible pressure sensors lack the required durability and detection range.
Purpose of the Study:
- To create unprecedented bioinspired wearable electronics with a gradient porous structure.
- To achieve an ultrabroad pressure detection range and high durability.
Main Methods:
- Fabrication of reduced graphene oxide/polyurethane nanocomposite aerogels.
- Utilized a sol-gel/hot pressing/freeze casting/ambient pressure drying strategy.
- Engineered gradient porous structures for enhanced strain transfer.
Main Results:
- Achieved an ultrabroad pressure detection range from 1 Pa to 12.6 MPa.
- Demonstrated exceptional durability, withstanding 10,000 compression cycles at 1 MPa.
- The gradient structure facilitated strain transfer and resistance variation.
Conclusions:
- The developed nanocomposite aerogels represent a breakthrough in wearable pressure-sensing technology.
- These materials are suitable for electronic skins, motion monitoring, and ultrahigh pressure detection.
- Gradient aerogels also show potential as efficient separators for water purification.
