Highly sensitive and multifunctional piezoresistive sensor based on polyaniline foam for wearable Human-Activity monitoring. (June 2019)

• Record Type: Journal Article
• Authors: Zheng, Shaodi; Wu, Xiaotian; Huang, Yanhao; Xu, Zewang; Yang, Wei; Liu, Zhengying; Huang, Shilin; Xie, Banghu; Yang, Mingbo
• Is Part Of: Composites. Volume 121(2019)
• Page Start: 510
• Page End: 516
• Publication Date: 2019-06
• Subjects: PANI foam -- Micro-cracks -- Sensitivity -- Multifunctional piezoresistive sensor; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2019.04.014
• Languages: English
• ISSNs: 1359-835X

Abstract

Abstract: A highly stretchable and sensitive multifunctional piezoresistive sensor was reported. These sensors contain micro-cracked and hollowed-out polyaniline (PANI) foams which are supported by polydimethylsiloxane (PDMS). The cracked-PANI foam/PDMS (C-PF/PDMS) strain sensor shows high sensitivity with a gauge factor of ∼10 and excellent linearity and high durability over 500 stretching-releasing cycles. The fabricated C-PF/PDMS pressure sensor exhibits a sensitivity of ∼0.055 kPa −1 in the pressure range of 0–5.0 kPa, a low detection limit of 4 Pa, a fast response time (∼60 ms), recovery time (∼90 ms) and the capability of detecting and distinguishing various mechanical stimuli including compression, shear and torsion forces. When the sensor is attached to the human body, it can function as a health-monitoring device by detecting various human motions such as the bending of fingers and wrist, phonation and the wrist pulse.