Volume 142, Issue 4 e56419
RESEARCH ARTICLE

A hydrogel sensor based on conic baston structure

Jian Qi

Corresponding Author

Jian Qi

Tianjin High-end Intelligent CNC Machine Tool Engineering Research Center, Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin, China

Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, China

Correspondence

Jian Qi, Tianjin High-end Intelligent CNC Machine Tool Engineering Research Center, Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin 300222, China.

Email: [email protected]; [email protected]

Contribution: Conceptualization (equal), Methodology (equal), Project administration (equal), Supervision (equal), Writing - original draft (equal)

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Lukui Yin

Lukui Yin

Tianjin High-end Intelligent CNC Machine Tool Engineering Research Center, Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin, China

Contribution: Data curation (equal)

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Guoliang Zhang

Guoliang Zhang

Tianjin High-end Intelligent CNC Machine Tool Engineering Research Center, Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin, China

Contribution: Methodology (equal), Validation (equal)

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Yang Li

Yang Li

Tianjin High-end Intelligent CNC Machine Tool Engineering Research Center, Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin, China

Contribution: ​Investigation (equal), Validation (equal)

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Shuxian Zheng

Shuxian Zheng

Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, China

Contribution: Funding acquisition (equal)

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Shuo Gao

Shuo Gao

Tianjin High-end Intelligent CNC Machine Tool Engineering Research Center, Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin, China

Contribution: Data curation (equal)

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Dake Huang

Dake Huang

Tianjin High-end Intelligent CNC Machine Tool Engineering Research Center, Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin, China

Contribution: Data curation (equal)

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HouJun Qi

HouJun Qi

Tianjin High-end Intelligent CNC Machine Tool Engineering Research Center, Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin, China

Contribution: Supervision (equal)

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First published: 26 October 2024

Abstract

Resistive flexible pressure sensors are extensively employed in wearable devices owing to their wide operational range and straightforward construction. This study presents a conic bastion-structured sensor microunit to improve the sensor sensitivity. The base hydrogel is synthesized using acrylamide (AM), with Mg2+ and Na+ acting as conductive ions. The sensor is fabricated using digital light processing (DLP) 3D printing technology and is subjected to experimental evaluation. The findings indicate that the hydrogel sensor with a 50 wt% AM composition demonstrates enhanced mechanical strength and conductive properties, achieving a peak sensitivity of 0.534 kPa−1 within a pressure range of 0–0.8 kPa. Furthermore, the sensor exhibits favorable response characteristics (30 ms) and recovery characteristics (40 ms), along with stability. The proposed sensor is suitable for wearable devices and live joint angle detection. Additionally, the “handwriting fingerprint” pattern recognition and document verification proposed in this article make it applicable in scenarios, such as banking, notarization, and other handwriting and seal verification contexts.

CONFLICT OF INTEREST STATEMENT

The authors declare no conflicts of interest.

DATA AVAILABILITY STATEMENT

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

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