A wearable fabric strain sensor assemblied by graphene with dual sensing performance approach to practice application as
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ORIGINAL RESEARCH
A wearable fabric strain sensor assemblied by graphene with dual sensing performance approach to practice application assisted by wireless Bluetooth Longfei Sun . Fei Wang Mingze Li . Yixin Liu
. Jingjing Jiang . Hangcheng Liu . Binglei Du . . Minghua Li
Received: 7 March 2020 / Accepted: 13 August 2020 Ó Springer Nature B.V. 2020
Abstract Sodium alginate (SA), as the eco-friendly and human-safe biomass material not only can achieve effective dispersion of graphene nanoplatelets (GnPs), but also improve the interaction between GnPs and cellulose macromolecules. Based on this, a flexible and wearable GnPs/cellulose strain sensor with a special 2 9 2 double rib knitted fabric structure (KFGS) was prepared by a simple dip-coating method that could be used on a large scale. The KFGS exhibited dual sensing performance with high sensitivity (25.32 kPa-1 at 3 kPa pressure, gauge factor Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03401-5) contains supplementary material, which is available to authorized users. L. Sun F. Wang H. Liu B. Du M. Li Y. Liu (&) College of Textiles and Clothing, Qingdao University, 7 Hong Kong East Road, Laoshan District, Qingdao 266071, China e-mail: [email protected] J. Jiang National Textile and Garment Quality Supervision and Inspection Center, 396 Pingan Road, Zhendong New District, Wutong Street, Tongxiang, Jiaxing 314500, China M. Li (&) State Key Laboratory of Bio-Polysaccharide Fiber Forming and Ecological Textiles, Qingdao University, 7 Hong Kong East Road, Laoshan District, Qingdao 266071, China e-mail: [email protected]
32.62 at 25% tensile strain), stretchability (e [ 25%) and dynamic stability (signal drift \ 6% after 300 cycles). Its potential application prospects were also predicted by the monitoring of human movement and physical parameters through a wireless Bluetooth connection. Keywords Wearable strain sensor Knitted fabric Graphene Sodium alginate Dip-coating
Introduction With the increasing popularity of wearable electronic devices in daily life, the development of wearable structural substrates and sensing materials for constructing a good interaction between the human body and electronic devices had also attracted more attention (Jayathilaka et al. 2019; Liu et al. 2017). Textiles with inherent flexibility and wearable characteristics are ideal platforms for monitoring human motion, collecting and converting vital signs signals, and are also known as electronic textiles (E-textiles) (Jin et al. 2019). Generally, it is easy to construct the electronic textiles by embedding electronic components directly into textiles, but rigid electronic components often lead to the structural mismatches with flexible textile substrates. Integration of textile structures (e.g. yarns (Yan et al. 2018), woven fabric (Liu et al. 2019c, a, b),
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Cellulose
knitted fabric (Poincloux et al. 2018), nonwoven fabric (Liu et al. 2019c, a, b)) with v
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