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Flexible stress sensor and its preparation method

A stress sensor and flexible technology, applied in the field of sensors, can solve the problems of small strain range, poor linearity, poor stability, etc., and achieve the effect of large strain range, strong environmental adaptability and light weight

Active Publication Date: 2021-12-14
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the flexible stress sensor is mainly prepared by chemical method reduced graphene oxide (RGO) as the strain sensing material, and its linearity is poor. , easy to break under strain, so the strain range is small and the stability is poor

Method used

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  • Flexible stress sensor and its preparation method

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] like figure 1 and figure 2 As shown, the present invention proposes a flexible stress sensor, which includes a strain sensing layer, an electrode and a flexible packaging layer, the strain sensing layer is electrically connected to the electrodes, and the flexible packaging layer includes an upper PDMS substrate and the underlying PDMS substrate, and cover the strain sensing layer and the electrodes.

[0035] The strain sensing layer is redox graphene with a prismatic network structure after laser reduction, and the redox graphene is a material after laser reduction twice.

[0036] The electrodes include silver paste and wires, one end of the wires is bonded to the strain sensing layer through the silver paste, and the other end is led t...

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Abstract

The invention provides a flexible stress sensor and a preparation method thereof. The flexible stress sensor includes a strain sensing layer, an electrode and a flexible packaging layer, the strain sensing layer is electrically connected to the electrodes, and the flexible packaging layer includes an upper layer of PDMS The substrate and the underlying PDMS substrate cover the strain sensing layer and the electrodes, the electrodes include silver paste and wires, one end of the wires is bonded to the strain sensing layer through the silver paste, and the other end is led to Outside the flexible packaging layer, the strain sensing layer is redox graphene with a prismatic network structure after laser reduction. Compared with the prior art, the invention has good durability, large strain range during stretching, high sensitivity and linear and stable change.

Description

technical field [0001] The invention relates to a flexible stress sensor and a preparation method thereof, belonging to the field of sensors. Background technique [0002] With the technological development of stress sensors, there is an increasing demand for real-time medical monitoring, biointegrated therapy, wearable displays, and lightweight mobile electronics. In contrast to rigid supports such as glass or silicon wafers, flexible electronics are built on flexible polymers such as polyethylene terephthalate PET, polyethyleneimine PEI or polydimethylsiloxane PDMS Due to the elasticity of this flexible polymer, the electronic components on the flexible polymer substrate can be bent and uniformly stretched, which can be widely used in deformable touch screens, biometric devices, wearable supercapacitors or solar energy battery etc. [0003] At present, the flexible stress sensor is mainly prepared by chemical method reduced graphene oxide (RGO) as the strain sensing mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/22G01L9/04G01H11/06A61B5/024
CPCG01L1/22G01L9/04G01H11/06A61B5/024A61B5/02444
Inventor 徐荣青刘磊赵江孙力君
Owner NANJING UNIV OF POSTS & TELECOMM
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