Anisotropic structural carbon nanotube aerogels for piezoresistive strain sensors with multidirectional sensitivity

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2024-11-27 DOI:10.1016/j.compositesb.2024.112028

Dong Li , Haomin Wang , Zhaoyang Han , Qianru Wu , Xuan Lv , Yingying Zhang , Mengyu Wang , Zhibo Li , Maoshuai He

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引用次数: 0

Abstract

Piezoresistive-type flexible strain sensors that accurately translate strain into resistance variation are gaining significant attention for their potential applications in healthcare, sports monitoring, and human-machine interfaces. However, most reported sensors can only respond to strain in specific directions. Multidirectional or even omnidirectional strain sensing is highly desirable but remains a challenge. In this work, we develop high-performance multidirectional piezoresistive strain sensors based on an anisotropic structural carbon nanotube aerogel (CNTA) infilled with polydimethylsiloxane (PDMS). The resulting CNTA/PDMS composites inherit the electrically conductive and deformation-sensitive network of the anisotropic CNTA, leading to high and anisotropic sensitivity to mechanical deformation. In the perpendicular microchannel direction, the gauge factor of CNTA/PDMS is as high as 30 upon 2 % compressive strain. These properties make the CNTA/PDMS composite a high-performance piezoresistive sensor for monitoring human body motion in a multidirectional sensing manner.

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.