Self-assembled gel-assisted preparation of high-performance hydrophobic PDMS@MWCNTs/PEDOT:PSS composite aerogels for wearable piezoresistive sensors

Haibin Li ¹Rubai Luo ²Jingbo Hu ²Kenan Yang ¹Bin Du ³Shisheng Zhou ⁴Xing Zhou⁵

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作者信息

1. School of Mechanical and Precision Instrument Engineering,Xi'an University of Technology,Xi'an 710048,China
2. Faculty of Printing,Packaging Engineering and Digital Media Technology,Xi'an University of Technology,Xi'an 710048,China;Shanxi Key Laboratory of Advanced Manufacturing Technology,North University of China,Taiyuan 038507,China
3. Faculty of Printing,Packaging Engineering and Digital Media Technology,Xi'an University of Technology,Xi'an 710048,China;Shaanxi Provincial Key Laboratory of Printing and Packaging Engineering,Xi'an University of Technology,Xi'an 710048,China
4. School of Mechanical and Precision Instrument Engineering,Xi'an University of Technology,Xi'an 710048,China;Faculty of Printing,Packaging Engineering and Digital Media Technology,Xi'an University of Technology,Xi'an 710048,China;Shaanxi Provincial Key Laboratory of Printing and Packaging Engineering,Xi'an University of Technology,Xi'an 710048,China
5. Faculty of Printing,Packaging Engineering and Digital Media Technology,Xi'an University of Technology,Xi'an 710048,China
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Abstract

The conductive polymer poly(3,4-thylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)exhibits po-tential in the development of flexible devices due to its unique conjugated structure and water-solubility characteristics.To address the incompressibility of the original PEDOT:PSS aerogel without compromis-ing its high conductivity,a stable interpenetrating polymer network(IPN)was self-assembled by guiding the molecular motion within PEDOT:PSS and introducing multi-walled carbon nanotubes(MWCNTs).By combining critical surface removal,directional freeze-drying,and polydimethylsiloxane(PDMS)reinforce-ment processes,a hydrophobic PDMS@MWCNTs/PP aerogel with a highly oriented porous structure and high strength was prepared.Under the synergistic effect of MWCNTs/PEDOT:PSS electroactive scaffold,the composite aerogel exhibited a high sensitivity of up to 16.603 kPa-1 at 0-2 kPa,a fast response time of 74 ms,and excellent repeatability.Moreover,the sensor possessed hydrophobicity with a good water contact angle of 137° The sensor could serve as a wearable electronic monitoring device to achieve ac-curate and sensitive detection of human motion including large-scale human activities and tiny muscle movements.Therefore,our findings provide a new direction to fabricate high-performance piezoresistive sensors based on three-dimensional(3D)conductive polymer active scaffolds,demonstrating their great potential for flexible electronics,human-computer interaction,and a wide range of applications under special working conditions.

Key words

Pressure sensor/PEDOT:PSS/MWCNTs hydrogel/Composite aerogel/Hierarchical porous structure/Human motion detection

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基金项目

Xi'an Science and Technology Plan Project(GXYD14.27)

Xi'an Science and Technology Plan Project(GX2338)

Key Scientific Research Program of Shaanxi Provincial Department of Education(22JY046)

Key Scientific Research Program of Shaanxi Provincial Department of Education(21JY032)

Opening Project of Shanxi Key Laboratory of Advanced Manufacturing Technology of North University of China(XJZZ202104)

General Project of Natural Science Basic Research Program of Shaanxi Provincial Department of Science and Technology(2023-JC-YB-424)

出版年

2024

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

参考文献量56

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