A Flexible Pressure Sensor Based on Graphene/Epoxy Resin Composite Film and Screen Printing Process
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Published:2023-09-24
Issue:19
Volume:13
Page:2630
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ISSN:2079-4991
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Container-title:Nanomaterials
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language:en
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Short-container-title:Nanomaterials
Author:
Lin Qijing12345, Zhang Fuzheng145ORCID, Xu Xiangyue1, Yang Haolin1, Mao Qi1ORCID, Xian Dan145, Yao Kun1, Meng Qingzhi145
Affiliation:
1. State Key Laboratory of Mechanical Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China 2. School of Mechanical and Manufacturing Engineering, Xiamen Institute of Technology, Xiamen 361021, China 3. Chongqing Academician Workstation, Chongqing 2011 Collaborative Innovation Centers of Micro/Nano Sensing and Intelligent Ecological Internet of Things, Chongqing Key Laboratory of Micro-Nano Systems and Intelligent Sensing, Chongqing Technology and Business University, Chongqing 400067, China 4. Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai 265503, China 5. Xi’an Jiaotong University (Yantai) Research Institute for Intelligent Sensing Technology and System, Xi’an Jiaotong University, Xi’an 710049, China
Abstract
At present, flexible pressure-sensitive materials generally have problems with weak adhesion and poor wear resistance, which easily result in friction failure when used for plantar pressure detection. In this study, a flexible pressure sensor with the advantages of a wide detection range, fast recovery, and good abrasive resistance was designed and prepared based on the screen printing process. The pressure-sensitive unit with a structural size of 5 mm× 8 mm was a functional material system due to the use of graphene and epoxy resin. The influence of the different mass ratios of the graphene and epoxy resin on the sensing properties was also studied. The test results showed that when the mass ratio of graphene to epoxy resin was 1:4, the response time and recovery time of the sensing unit were 40.8 ms and 3.7 ms, respectively, and the pressure detection range was 2.5–500 kPa. The sensor can detect dynamic pressure at 0.5 Hz, 1 Hz, 2 Hz, 10 Hz, and 20 Hz and can withstand 11,000 cycles of bending. In addition, adhesion tests showed that the high viscosity of the epoxy helped to improve the interlayer bond between the pressure-sensitive materials and the flexible substrate, which makes it more suitable for plantar pressure detection environments, where friction is common.
Funder
Postdoctoral Innovation Talents Support Program National Natural Science Foundation of China Natural Science Foundation of Chongqing City
Subject
General Materials Science,General Chemical Engineering
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