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Nano Research 2024, 17(3): 1923-1932 https://doi.org/10.1007/s12274-023-6025-z
Research Article | Issue | Published: 10 August 2023

3D interlocked all-textile structured triboelectric pressure sensor for accurately measuring epidermal pulse waves in amphibious environments

Show Author's Information Shaobo Si1,§,  Chenchen Sun1,§,  Yufen Wu2,  Jingjing Li1,  Han Wang1,  Yinggang Lin1,  Jin Yang1( ),  Zhong Lin Wang3,4( )
Department of Optoelectronic Engineering, Key Laboratory of Optoelectronic Technology and Systems Ministry of Education, Chongqing University, Chongqing 400044, China
College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

§ Shaobo Si and Chenchen Sun contributed equally to this work.

Keywords:
triboelectric pressure sensor, amphibious fabric, interlocking fabric, pulse wave measurement, one-piece preparation method
Topics:
Pressure sensors
Cite this article:
Si S, Sun C, Wu Y, et al. 3D interlocked all-textile structured triboelectric pressure sensor for accurately measuring epidermal pulse waves in amphibious environments. Nano Research, 2024, 17(3): 1923-1932. https://doi.org/10.1007/s12274-023-6025-z
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Abstract Full text Electronic supplementary material About this article

The performance degradation and even damage of the e-textiles caused by sweat, water, or submersion during all-weather health monitoring are the main reasons that e-textiles have not been commercialized and routinized so far. Herein, we developed an amphibious, high-performance, air-permeable, and comfortable all-textile triboelectric sensor for continuous and precise measurement of epidermal pulse waves during full-day activities. Based on the principle of preparing gas by acid-base neutralization reaction, a one-piece preparation process of amphibious conductive yarn (ACY) with densely porous structures is proposed. An innovative three-dimensional (3D) interlocking fabric knitted from ACYs (0.6 mm in diameter) and polytetrafluoroethylene yarns exhibit high sensitivity (0.433 V·kPa−1), wide bandwidth (up to 10 Hz), and stability (> 30,000 cycles). With these benefits, 98.8% agreement was achieved between wrist pulse waves acquired by the sensor and a high-precision laser vibrometer. Furthermore, the polytetrafluoroethylene yarn with good compression resilience provides sufficient mechanical support for the contact separation of the ACYs. Meanwhile, the unique skeletonized design of the 3D interlocking structure can effectively relieve the water pressure on the sensor surface to obtain stable and accurate pulse waves (underwater depth of 5 cm). This achievement represents an important step in improving the practicality of e-textiles and early diagnosis of cardiovascular diseases.


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Electronic supplementary material
About this article

3D interlocked all-textile structured triboelectric pressure sensor for accurately measuring epidermal pulse waves in amphibious environments

Show Author's information Shaobo Si1,§, Chenchen Sun1,§, Yufen Wu2, Jingjing Li1, Han Wang1, Yinggang Lin1, Jin Yang1( ), Zhong Lin Wang3,4( )
Department of Optoelectronic Engineering, Key Laboratory of Optoelectronic Technology and Systems Ministry of Education, Chongqing University, Chongqing 400044, China
College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

§ Shaobo Si and Chenchen Sun contributed equally to this work.

Abstract

The performance degradation and even damage of the e-textiles caused by sweat, water, or submersion during all-weather health monitoring are the main reasons that e-textiles have not been commercialized and routinized so far. Herein, we developed an amphibious, high-performance, air-permeable, and comfortable all-textile triboelectric sensor for continuous and precise measurement of epidermal pulse waves during full-day activities. Based on the principle of preparing gas by acid-base neutralization reaction, a one-piece preparation process of amphibious conductive yarn (ACY) with densely porous structures is proposed. An innovative three-dimensional (3D) interlocking fabric knitted from ACYs (0.6 mm in diameter) and polytetrafluoroethylene yarns exhibit high sensitivity (0.433 V·kPa−1), wide bandwidth (up to 10 Hz), and stability (> 30,000 cycles). With these benefits, 98.8% agreement was achieved between wrist pulse waves acquired by the sensor and a high-precision laser vibrometer. Furthermore, the polytetrafluoroethylene yarn with good compression resilience provides sufficient mechanical support for the contact separation of the ACYs. Meanwhile, the unique skeletonized design of the 3D interlocking structure can effectively relieve the water pressure on the sensor surface to obtain stable and accurate pulse waves (underwater depth of 5 cm). This achievement represents an important step in improving the practicality of e-textiles and early diagnosis of cardiovascular diseases.

Keywords: triboelectric pressure sensor, amphibious fabric, interlocking fabric, pulse wave measurement, one-piece preparation method

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Publication history
Copyright
Acknowledgements

Publication history

Received: 09 May 2023
Revised: 06 July 2023
Accepted: 19 July 2023
Published: 10 August 2023
Issue date: March 2024

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was supported by the National Key Research and Development Program of China (No. 2021YFA1201600), the Natural Science Foundation Projects of Chongqing (No. cstc2022ycjh-bgzxm0206), and the Natural Science Foundation of Innovative Research Groups (No. cstc2020jcyj-cxttX0005).

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