Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection

Zhao, Xin; Mei, Dong; Tang, Gangqiang; Zhao, Chun; Wang, Jianfeng; Luo, Minzhou; Li, Lijie; Wang, Yanjie

doi:10.3390/polym15061386

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Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection

Xin Zhao

, Dong Mei

, Gangqiang Tang

, Chun Zhao, Jianfeng Wang, Minzhou Luo, Lijie Li

, Yanjie Wang

Polymers, Volume: 15, Issue: 6, Start page: 1386

Swansea University Author: Lijie Li

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DOI (Published version): 10.3390/polym15061386

Abstract

Flexible wearable devices have attracted wide attention in capacious fields because of their real-time and continuous monitoring of human information. The development of flexible sensors and corresponding integration with wearable devices is of great significance to build smart wearable devices. In...

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Published in:	Polymers
ISSN:	2073-4360
Published:	MDPI AG 2023
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa63092

first_indexed	2023-04-05T21:00:51Z
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In this work, multi-walled carbon nanotube/polydimethylsiloxane-based (MWCNT/PDMS) resistive strain sensors and pressure sensors were developed to integrate a smart glove for human motion/perception detection. Firstly, MWCNT/PDMS conductive layers with excellent electrical and mechanical properties (resistivity of 2.897 KΩ · cm, elongation at break of 145%) were fabricated via a facile scraping-coating method. Then, a resistive strain sensor with a stable homogeneous structure was developed due to the similar physicochemical properties of the PDMS encapsulation layer and MWCNT/PDMS sensing layer. The resistance changes of the prepared strain sensor exhibited a great linear relationship with the strain. Moreover, it could output obvious repeatable dynamic response signals. It still had good cyclic stability and durability after 180° bending/restoring cycles and 40% stretching/releasing cycles. Secondly, MWCNT/PDMS layers with bioinspired spinous microstructures were formed by a simple sandpaper retransfer process and then assembled face-to-face into a resistive pressure sensor. The pressure sensor presented a linear relationship of relative resistance change and pressure in the range of 0–31.83 KPa with a sensitivity of 0.026 KPa−1, and a sensitivity of 2.769 × 10−4 KPa−1 over 32 KPa. Furthermore, it responded quickly and kept good cycle stability at 25.78 KPa dynamic loop over 2000 s. Finally, as parts of a wearable device, resistive strain sensors and a pressure sensor were then integrated into different areas of the glove. 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spelling	2023-05-18T14:58:04.8603481 v2 63092 2023-04-05 Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection ed2c658b77679a28e4c1dcf95af06bd6 0000-0003-4630-7692 Lijie Li Lijie Li true false 2023-04-05 ACEM Flexible wearable devices have attracted wide attention in capacious fields because of their real-time and continuous monitoring of human information. The development of flexible sensors and corresponding integration with wearable devices is of great significance to build smart wearable devices. In this work, multi-walled carbon nanotube/polydimethylsiloxane-based (MWCNT/PDMS) resistive strain sensors and pressure sensors were developed to integrate a smart glove for human motion/perception detection. Firstly, MWCNT/PDMS conductive layers with excellent electrical and mechanical properties (resistivity of 2.897 KΩ · cm, elongation at break of 145%) were fabricated via a facile scraping-coating method. Then, a resistive strain sensor with a stable homogeneous structure was developed due to the similar physicochemical properties of the PDMS encapsulation layer and MWCNT/PDMS sensing layer. The resistance changes of the prepared strain sensor exhibited a great linear relationship with the strain. Moreover, it could output obvious repeatable dynamic response signals. It still had good cyclic stability and durability after 180° bending/restoring cycles and 40% stretching/releasing cycles. Secondly, MWCNT/PDMS layers with bioinspired spinous microstructures were formed by a simple sandpaper retransfer process and then assembled face-to-face into a resistive pressure sensor. The pressure sensor presented a linear relationship of relative resistance change and pressure in the range of 0–31.83 KPa with a sensitivity of 0.026 KPa−1, and a sensitivity of 2.769 × 10−4 KPa−1 over 32 KPa. Furthermore, it responded quickly and kept good cycle stability at 25.78 KPa dynamic loop over 2000 s. Finally, as parts of a wearable device, resistive strain sensors and a pressure sensor were then integrated into different areas of the glove. The cost-effective, multi-functional smart glove can recognize finger bending, gestures, and external mechanical stimuli, which holds great potential in the fields of medical healthcare, human-computer cooperation, and so on. Journal Article Polymers 15 6 1386 MDPI AG 2073-4360 MWCNT/PDMS; pressure sensor; smart glove; strain sensor; wearable devices. 10 3 2023 2023-03-10 10.3390/polym15061386 http://dx.doi.org/10.3390/polym15061386 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University Another institution paid the OA fee The National Natural Science Foundation of China (51975184), the Changzhou Sci &Tech Program (CE20215051), and the National Key Research and Development Program of China (2020YFB1312900). The authors gratefully acknowledge the supports. 2023-05-18T14:58:04.8603481 2023-04-05T21:57:58.0007545 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Xin Zhao 0000-0002-9698-8767 1 Dong Mei 0000-0001-5943-9470 2 Gangqiang Tang 0000-0002-1994-8438 3 Chun Zhao 4 Jianfeng Wang 5 Minzhou Luo 6 Lijie Li 0000-0003-4630-7692 7 Yanjie Wang 8 63092__27199__3fb5711659844bc096a818a6daaccb9e.pdf 63092.pdf 2023-04-25T15:54:31.9135560 Output 4888270 application/pdf Version of Record true © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). true eng https://creativecommons.org/licenses/by/4.0
title	Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection
spellingShingle	Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection Lijie Li
title_short	Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection
title_full	Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection
title_fullStr	Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection
title_full_unstemmed	Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection
title_sort	Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection
author_id_str_mv	ed2c658b77679a28e4c1dcf95af06bd6
author_id_fullname_str_mv	ed2c658b77679a28e4c1dcf95af06bd6_***_Lijie Li
author	Lijie Li
author2	Xin Zhao Dong Mei Gangqiang Tang Chun Zhao Jianfeng Wang Minzhou Luo Lijie Li Yanjie Wang
format	Journal article
container_title	Polymers
container_volume	15
container_issue	6
container_start_page	1386
publishDate	2023
institution	Swansea University
issn	2073-4360
doi_str_mv	10.3390/polym15061386
publisher	MDPI AG
college_str	Faculty of Science and Engineering
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url	http://dx.doi.org/10.3390/polym15061386
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description	Flexible wearable devices have attracted wide attention in capacious fields because of their real-time and continuous monitoring of human information. The development of flexible sensors and corresponding integration with wearable devices is of great significance to build smart wearable devices. In this work, multi-walled carbon nanotube/polydimethylsiloxane-based (MWCNT/PDMS) resistive strain sensors and pressure sensors were developed to integrate a smart glove for human motion/perception detection. Firstly, MWCNT/PDMS conductive layers with excellent electrical and mechanical properties (resistivity of 2.897 KΩ · cm, elongation at break of 145%) were fabricated via a facile scraping-coating method. Then, a resistive strain sensor with a stable homogeneous structure was developed due to the similar physicochemical properties of the PDMS encapsulation layer and MWCNT/PDMS sensing layer. The resistance changes of the prepared strain sensor exhibited a great linear relationship with the strain. Moreover, it could output obvious repeatable dynamic response signals. It still had good cyclic stability and durability after 180° bending/restoring cycles and 40% stretching/releasing cycles. Secondly, MWCNT/PDMS layers with bioinspired spinous microstructures were formed by a simple sandpaper retransfer process and then assembled face-to-face into a resistive pressure sensor. The pressure sensor presented a linear relationship of relative resistance change and pressure in the range of 0–31.83 KPa with a sensitivity of 0.026 KPa−1, and a sensitivity of 2.769 × 10−4 KPa−1 over 32 KPa. Furthermore, it responded quickly and kept good cycle stability at 25.78 KPa dynamic loop over 2000 s. Finally, as parts of a wearable device, resistive strain sensors and a pressure sensor were then integrated into different areas of the glove. The cost-effective, multi-functional smart glove can recognize finger bending, gestures, and external mechanical stimuli, which holds great potential in the fields of medical healthcare, human-computer cooperation, and so on.
published_date	2023-03-10T17:01:46Z
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Strain and Pressure Sensors Based on MWCNT/PDMS for Human Motion/Perception Detection

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