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Liquid metal/CNTs hydrogel-based transparent strain sensor for wireless health monitoring of aquatic animals

文献类型： 外文期刊

作者： Sun, Mengmeng 1 ; Li, Peiyi 1 ; Qin, Haiyang 1 ; Liu, Na 1 ; Ma, Hude 4 ; Zhang, Zhilin 4 ; Li, Junye 5 ; Lu, Baoyang 4 ; Pan, Xiaofang 5 ; Wu, Lidong 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Fisheries Engn Inst, Beijing 100141, Peoples R China

2.Chinese Acad Fishery Sci, Beijing 100141, Peoples R China

3.Shanghai Ocean Univ, Coll Food Sci & Technol, Shanghai 201306, Peoples R China

4.Jiangxi Sci & Technol Normal Univ, Flexible Elect Innovat Inst, Nanchang 330013, Jiangxi, Peoples R China

5.Shenzhen Univ, Coll Elect & Informat Engn, Shenzhen 518000, Guangdong, Peoples R China

关键词： Liquid metal; CNTs; Hydrogel; Strain sensors; Aquatic animals

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2023 年 454 卷

页码：

收录情况： SCI

摘要： Strain sensors are intriguing in advanced electronics and are typically composed of active sensing materials. Good elastic recovery, self-healing, good adhesion, high transparency, and great mechano-response are essential but can be rarely met in one material. Here, we report a wireless strain sensor that exhibits tissue-like mechanical properties (softness), is conformable to soft tissues (heart and tail) and has the lowest limit of detection (0.25 % stretch). After introducing multiwalled carbon nanotubes (CNTs) bridged liquid metal (LM) composites (LM/CNTs), the strain sensor simultaneously achieves excellent transparency and conductivity. This LM/CNTs hydrogel overcomes the limitations of the traditional hydrogel and achieves high conductivity (up to 94 S/m), good stretchability (2,200 %), and a high degree of transparency (93 %), in addition to enough adhesion (20 kPa) and rapid self-healing (20 min). The strain sensor device is composed of intrinsically soft LM/CNTs hydrogel as sensing material, a microcontroller, signal-processing circuits, and Bluetooth transceiver. This device is applied to recording high-quality heartbeat signals and clear in-site observation of cardiac bleeding, which has helped a Chinese sturgeon survive after Caesarean. This approach provides an ideal strategy for protecting and saving endangered animals and broadens the applications of strain sensors.

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