Stretchable and negative-Poisson-ratio porous metamaterials

Xiaoyu Zhang, Qi Sun, Xing Liang, Puzhong Gu, Zhenyu Hu, Xiao Yang, Muxiang Liu, Zejun Sun, Jia Huang, Guangming Wu and Guoqing Zu ()
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Xiaoyu Zhang: Tongji University
Qi Sun: Tongji University
Xing Liang: Tongji University
Puzhong Gu: Tongji University
Zhenyu Hu: Tongji University
Xiao Yang: Tongji University
Muxiang Liu: Tongji University
Zejun Sun: Tongji University
Jia Huang: Tongji University
Guangming Wu: Tongji University
Guoqing Zu: Tongji University

Nature Communications, 2024, vol. 15, issue 1, 1-14

Abstract: Abstract Highly stretchable porous materials are promising for flexible electronics but their fabrication is a great challenge. Herein, several kinds of highly stretchable conductive porous elastomers with low or negative Poisson’s ratios are achieved by uniaxial, biaxial, and triaxial hot-pressing strategies. The reduced graphene oxide/polymer nanocomposite elastomers with folded porous structures obtained by uniaxial hot pressing exhibit high stretchability up to 1200% strain. Furthermore, the meta-elastomers with reentrant porous structures combining high biaxial (or triaxial) stretchability and negative Poisson’s ratios are achieved by biaxial (or triaxial) hot pressing. The resulting elastomer-based wearable strain sensors exhibit an ultrawide response range (0-1200%). The materials can be applied for smart thermal management and electromagnetic interference shielding, which are achieved by regulating the porous microstructures via stretching. This work provides a versatile strategy to highly stretchable and negative-Poisson-ratio porous materials with promising features for various applications such as flexible electronics, thermal management, electromagnetic shielding, and energy storage.

Date: 2024
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DOI: 10.1038/s41467-024-44707-3

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