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Flexible piezoresistive sensors and triboelectric nanogenerators based on 3D porous structure PDMS/PPy composites materials

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Abstract

Both flexible piezoresistive sensors (FPS) and triboelectric nanogenerators (TENG) have the huge demand for the application in human physiological signals monitoring and human activity monitoring. In this work, the flexible three-dimensional (3D) porous structure polydimethylsiloxane/polypyrrole (PDMS/PPy) composite materials were designed and prepared. The 3D porous structure PDMS/PPy has large surface roughness and sufficient free volume for bulk deformation under pressure loading and unloading. The PDMS/PPy composite materials were used as sensitive materials of FPS and friction layer materials of TENG. The champion FPS based on PDMS/PPy composite materials has a sensitivity of 165.26 kPa−1 in the linear region of 200 kPa and long-term stability up to 5500 cycles. The two-electrode contact-separation mode TENG was assembled using Al-PI and PDMS/PPy-ITO. TENG exhibits an output voltage of 6 V, power density of 39.38 μW/cm2 and dynamic stability up to 10,000 cycles. This FPS and TENG can be integrated into flexible wearable platforms for self-powered real-time monitoring of physiological signals and human activity.

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The data that support the findings of this study are available on request from the corresponding author.

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Funding

This work has been financially supported by the National Science Foundation of China (No. 61904040).

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Author notes

  1. Zhou Qiao and Zhiwen Chen contributed equally to this study.

Authors and Affiliations

  1. School of Integrated Circuits, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China

    Zhou Qiao, Zhiwen Chen, Ningqi Luo, Aixiang Wei, Yuding He, Zhen Liu & Jiaxiong Xu

  2. School of Information and Intelligent Engineering, Guangzhou Xinhua University, Dongguan, 523133, Guangdong, China

    Aixiang Wei

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  1. Zhou Qiao
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Contributions

Material preparation, data collection and analysis were performed by Zhou Qiao, Zhiwen Chen, Ningqi Luo and Aixiang Wei. The first draft of the manuscript was written by Zhou Qiao, Zhiwen Chen. All authors contributed to the study conception and design. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Aixiang Wei.

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Qiao, Z., Chen, Z., Luo, N. et al. Flexible piezoresistive sensors and triboelectric nanogenerators based on 3D porous structure PDMS/PPy composites materials. J Mater Sci: Mater Electron 34, 1730 (2023). https://doi.org/10.1007/s10854-023-11131-0

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