Multifunctional flexible conductive filament for human motion detection and electrothermal. (January 2023)

• Record Type: Journal Article
• Authors: Tan, Sirui; Wang, Junsheng; Jin, Wanhui; Zhang, Qian; Zhao, Zhong; Li, Daiqi; Cheng, Deshan; Bi, Shuguang; Ran, Jianhua; Cai, Guangming; Wang, Xin
• Is Part Of: Composites communications. Volume 37(2023)
• Publication Date: 2023-01
• Subjects: Wearable electronics -- Liquid metal -- Corrosion resistance -- Human motion detection -- Electrothermal
• DOI: 10.1016/j.coco.2022.101446
• Languages: English
• ISSNs: 2452-2139

Abstract

Abstract: Highly sensitive wearable e-textiles play an important role in flexible sensors and next-generation personalized electronics with application potential in human physiological monitoring, environmental monitoring, and electronic skin. Here, a scalable and simple strategy for preparing liquid metal (LM)/carbon nanotubes (CNTs)@Ecoflex (LCEF) coaxial conductive filaments were fabricated by wet spinning. The electro-mechanical response behaviors of LCEF sensors were explored to evaluate their sensitivity and stability. The results demonstrated that the filament strain sensors could be used for monitoring both large and subtle human motions. Besides, the LCEF fabrics as a large-area flexible heater exhibited efficient electrothermal response, evidenced by achieving a temperature of over 112.1 °C upon applying a voltage of 12 V with 52.6 °C obtained on the fabrics within 42 s. This work may shed lights on scalable fabrication of flexible strain sensors and electrothermal devices which pave the way for the development of multifunctional wearable electronic devices. Graphical abstract: A scalable and simple strategy for preparing liquid metal (LM)/carbon nanotubes (CNTs)@Ecoflex (LCEF) coaxial conductive filament was fabricated by wet-spinning. The LCEF sensors exhibit high sensitivity for human motion detection and electrothermal response. Image 1 Highlights: Liquid metal/Carbon nanotubes@Ecoflex (LCEF) coaxial conductive filament was fabricated by wet-spinning. Conductive filament present better electro-mechanical properties and processability. Elastomer strain sensor exhibit high sensitivity, good stability and fast signal response for human motion detection. LCEF fabric as a large-area flexible heater show efficient electrothermal response.