Super-elastic and multifunctional graphene aerogels with multilayer cross-linked pore structure for dynamic force sensing arrays

被引：0
|
作者：
Zhang, Wenting [1 ]
Liu, Shilin [1 ]
Liang, Xiaoyu [1 ]
He, Jingzong [1 ]
Lu, Yonggen [1 ]
Wu, Qilin [1 ]
机构：
[1] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Adv Fiber Mat, Shanghai 201620, Peoples R China
来源：
CARBON | 2025年 / 236卷
基金：
中国国家自然科学基金;
关键词：
Graphene aerogel; Super-elasticity; Pressure sensor; Dynamic force perception; Multifunction; PRESSURE SENSOR; OXIDE;
D O I：
10.1016/j.carbon.2025.120105
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Multifunctional pressure sensing aerogels are essential for flexible wearable devices, and the microstructure directly affects the macroscopic properties of the aerogels. To obtain the graphene aerogel with a multilayer cross-linked pore structure, the aerogel skeleton was constructed using the foam template method and the compression annealing graphene aerogel (CAGA) was further fabricated via the compression annealing process. Finally, the thermoplastic polyurethane composite graphene aerogel (TPU/CAGA) was successfully obtained, endowing it with excellent comprehensive properties. The TPU/CAGA exhibited high electrical conductivity of 26.4 S/m and exceptional super-elasticity. The pressure sensor based on TPU/CAGA demonstrated high sensitivity (12.5 kPa-1), making it suitable for the detection of human physiological signals. Excitingly, the sensor array based on TPU/CAGA can perceive the direction and magnitude of the dynamic force in combination with the time dimension, and can present significantly different resistance signals for forces with different moving trajectories, realizing the recognition of writing traces. Additionally, its outstanding Joule heating performance and electromagnetic shielding property meet the requirements for multifunctional applications in cold outdoor environments. This study proposes a simple and intriguing strategy for pressure-sensing aerogel with significant application potential in the field of wearable devices.
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页数：13
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