Highly sensitive, wide-pressure and low-frequency characterized pressure sensor based on piezoresistive-piezoelectric coupling effects in porous wood

Jingjing Luo; Feihua Liu; Ao Yin; Xue Qi; Jiang Liu; Zhongqi Ren; Shiqiang Zhou; Yuxin Wang; Yang Ye; Qingzhi Ma; Junjun Zhu; Kang Li; Chen Zhang; Weiwei Zhao; Suzhu Yu; Jun Wei

doi:10.1016/j.carbpol.2023.120983

Highly sensitive, wide-pressure and low-frequency characterized pressure sensor based on piezoresistive-piezoelectric coupling effects in porous wood

Carbohydr Polym. 2023 Sep 1:315:120983. doi: 10.1016/j.carbpol.2023.120983. Epub 2023 May 9.

Authors

Jingjing Luo¹, Feihua Liu², Ao Yin¹, Xue Qi¹, Jiang Liu¹, Zhongqi Ren¹, Shiqiang Zhou¹, Yuxin Wang¹, Yang Ye¹, Qingzhi Ma³, Junjun Zhu⁴, Kang Li¹, Chen Zhang¹, Weiwei Zhao⁵, Suzhu Yu⁶, Jun Wei⁷

Affiliations

¹ Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China.
² Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China. Electronic address: liufeihua@hit.edu.cn.
³ School of Environmental and Nature Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, China.
⁴ Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China.
⁵ Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China. Electronic address: wzhao@hit.edu.cn.
⁶ Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China. Electronic address: szyu@hit.edu.cn.
⁷ Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China. Electronic address: junwei@hit.edu.cn.

PMID: 37230620
DOI: 10.1016/j.carbpol.2023.120983

Abstract

Lightweight and highly compressible materials have received considerable attention in flexible pressure sensing devices. In this study, a series of porous woods (PWs) are produced by chemical removal of lignin and hemicellulose from natural wood by tuning treatment time from 0 to 15 h and extra oxidation through H₂O₂. The prepared PWs with apparent densities varying from 95.9 to 46.16 mg/cm³ tend to form a wave-shaped interwoven structure with improved compressibility (up to 91.89 % strain under 100 kPa). The sensor assembled from PW with treatment time of 12 h (PW-12) exhibits the optimal piezoresistive-piezoelectric coupling sensing properties. For the piezoresistive properties, it has high stress sensitivity of 15.14 kPa^-1, covering a wide linear working pressure range of 0.06-100 kPa. For its piezoelectric potential, PW-12 shows a sensitivity of 0.443 V·kPa^-1 with ultralow frequency detection as low as 0.0028 Hz, and good cyclability over 60,000 cycles under 0.41 Hz. The nature-derived all-wood pressure sensor shows obvious superiority in the flexibility for power supply requirement. More importantly, it presents fully decoupled signals without cross-talks in the dual-sensing functionality. Sensor like this is capable of monitoring various dynamic human motions, making it an extremely promising candidate for the next generation artificial intelligence products.

Keywords: Highly sensitive; Piezoresistive-piezoelectric coupling; Porous wood; Pressure sensor.