J Shanghai Jiaotong Univ Sci

Journal of Shanghai Jiaotong University(Science) >

2025 , Vol. 30 >Issue 1: 18 - 26

DOI: https://doi.org/10.1007/s12204-023-2687-7

Medicine-Engineering Interdisciplinary

Direct Ink Writing Method of Fractal Wearable Flexible Sensor Based on Conductive Graphene/Polydimethylsiloxane Ink

  • CHEN Junling1，2，3 (陈俊伶) ,
  • GAO Feiyang1 ,
  • 3 (高飞扬) ,
  • ZHANG Liming1，3* (张黎明) ,
  • ZHENG Xiongfei1，3(郑雄飞)
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  • (1. State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 2. School of Mechanical Engineering, Shenyang Ligong University, Shenyang 110159, China; 3. Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, China)

Accepted date: 2023-03-28

  Online published: 2025-01-28

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Abstract

Flexible electronic technology has laid the foundation for complex human-computer interaction system, and has attracted great attention in the field of human motion detection and soft robotics. Graphene has received an extensive attention due to its excellent electrical conductivity; however, how to use it to fabricate wearable flexible sensors with complex structures remains challenging. In this study, we studied the rheological behavior of graphene/polydimethylsiloxane ink and proposed an optimal graphene ratio, which makes the ink have a good printability and conductivity at the same time. Then, based on the theory of Peano fractal layout, we proposed a two-dimensional structure that can withstand multi-directional tension by replacing the traditional arris structure with the arc structure. After that, we manufactured circular arc fractal structure sensor by adjusting ink composition and printing structure through direct ink writing method. Finally, we evaluated the detection performance and repeatability of the sensor. This method provides a simple and effective solution for fabricating wearable flexible sensors and exhibits the potential to fabricate 3D complex flexible electronic devices.

Cite this article

CHEN Junling1，2，3 (陈俊伶) , GAO Feiyang1 , 3 (高飞扬) , ZHANG Liming1，3* (张黎明) , ZHENG Xiongfei1，3(郑雄飞) . Direct Ink Writing Method of Fractal Wearable Flexible Sensor Based on Conductive Graphene/Polydimethylsiloxane Ink[J]. Journal of Shanghai Jiaotong University(Science), 2025 , 30(1) : 18 -26 . DOI: 10.1007/s12204-023-2687-7

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