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Zhang H, Wang S, Zhang J, Zhou G, Sun X, Wang Y, Wang Y, Zhang K. High-sensitivity piezoresistive sensors based on cellulose handsheets using origami-inspired corrugated structures. Carbohydr Polym 2024; 328:121742. [PMID: 38220352 DOI: 10.1016/j.carbpol.2023.121742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 12/19/2023] [Accepted: 12/26/2023] [Indexed: 01/16/2024]
Abstract
Cellulose-based composites have attracted significant attention in the fabrication and advancement of wearable devices due to their sustainable, degradable, and cost-effective properties. However, achieving a cellulosic sensor with reliable sensory feedback remains challenging owing to the deficiency in reversible microstructures during response processes. In this study, we developed a piezoresistive sensor consisting of nearly pure cellulose handsheets using origami-inspired corrugated structures to achieve durable and sensitive piezoresistive responses. Multi-walled carbon nanotubes (MWCNTs) were used as conducting agents. With the addition of 7 wt% MWCNTs, 36.27 % of the cellulose fiber surface was covered and the conductivity of cellulose handsheets was increased to 8.7 S/m. The obtained conductive cellulose handsheets were transformed into corrugated structures and integrated orthogonally to construct the piezoresistive sensors with reversible electrical paths for electrons. The restorable corrugated structure endowed the sensors with a wide workable pressure range (0-10 kPa), high sensitivity (6.09 kPa-1 in a range of 0-0.92 kPa), fast response time (<280 ms), and good durability (>1000 cycles). Furthermore, the practical applications of the proposed sensors as wearable devices were demonstrated through phonation, real-time sports monitoring, and step pressure tests.
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Affiliation(s)
- Hao Zhang
- School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou, Henan 450000, PR China.
| | - Shijun Wang
- School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou, Henan 450000, PR China
| | - Jie Zhang
- School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou, Henan 450000, PR China
| | - Gan Zhou
- School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou, Henan 450000, PR China
| | - Xiaohang Sun
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, Guangdong 519082, PR China
| | - Yiming Wang
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Yujie Wang
- School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou, Henan 450000, PR China
| | - Kang Zhang
- School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou, Henan 450000, PR China
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