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A flexible pressure sensor using graphene as an electrode material and its preparation method

A pressure sensor and electrode material technology, applied in the direction of measuring fluid pressure through electromagnetic components, measuring fluid pressure, instruments, etc., can solve the problem that the sensor cannot cope with complex stress

Active Publication Date: 2020-12-25
国宏中晶集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a flexible pressure sensor composed of good composite materials to solve the defects that the sensors in the prior art cannot cope with complex stress and deflection state

Method used

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  • A flexible pressure sensor using graphene as an electrode material and its preparation method
  • A flexible pressure sensor using graphene as an electrode material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A preparation device for a composite material of graphene, nanofibers and nanoparticles, comprising: an upper cylinder 3, an upper pressure ring 2, an upper pressure ring rubber 1, a lower pressure ring rubber 4, a lower pressure ring 5, and a lower cylinder 6 , bottom plate 7, air outlet 8, air outlet pipe 9, buffer ball 12, lower liquid pipe 13, air extraction pipe 10, air extractor 11; Flange, the innermost side of the upper pressure ring has an upper groove that matches the upper flange, and the upper cylinder and the upper pressure ring are closely matched through the upper flange and the upper groove; the upper pressure ring rubber 1 is located under the upper pressure ring The surface is annular, and the lower pressure ring rubber 4 is located on the upper surface of the lower pressure ring and is annular. The upper pressure ring rubber 1 and the lower pressure ring rubber 4 have a thickness of 600um / 700um / 800um / 900um / A uniform thin layer of 1000um, and the uppe...

Embodiment 2

[0059] 1) Electrospinning membrane preparation steps: select an appropriate amount of PCL fiber and add it to 100ml of analytical pure chloroform, and disperse it ultrasonically for 20 minutes to obtain a PCL fiber chloroform dispersion with a mass percentage of 5%.

[0060] Select an electrospinning voltage of 10kV, an extrusion speed of 2.5ml / h, a receiving distance of 20cm, an electrospinning time of 2h, and an ambient temperature of 4°C to obtain a PCL electrospun membrane. Here, the voltage is as low as possible, the speed is as slow as possible, and the ambient temperature is high. It is expected to obtain an electrospun membrane with a gap as large as possible to prepare for the follow-up.

[0061] 2) Membrane clamping step: select the PCL electrospun membrane that is larger than the area of ​​the upper pressure ring (2) or the lower pressure ring (5), and use a sufficient amount of tetrahydrofuran, absolute ethanol, double distilled water, and absolute ethanol in sequence...

Embodiment 3

[0065] 1) Electrospinning membrane preparation steps: select an appropriate amount of PCL fiber and add it to 100ml of analytically pure chloroform, and disperse it ultrasonically for 25 minutes to obtain a chloroform dispersion of PCL fiber with a mass percentage of 6%.

[0066] Select an electrospinning voltage of 12kV, an extrusion speed of 3.5ml / h, a receiving distance of 25cm, an electrospinning time of 2h, and an ambient temperature of 5°C to obtain a PCL electrospun membrane. Here, the voltage is as low as possible, the speed is as slow as possible, and the ambient temperature is high. It is expected to obtain an electrospun membrane with a gap as large as possible for subsequent preparations.

[0067] 2) Membrane clamping step: select the PCL electrospun membrane that is larger than the area of ​​the upper pressure ring (2) or the lower pressure ring (5), and use a sufficient amount of tetrahydrofuran, absolute ethanol, double distilled water, and absolute ethanol in se...

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Abstract

Provided is a flexible pressure sensor using graphene as the electrode material. Two outer flexible film layers are doped PCL electrospun films with graphene micro-sheets of which the average radial size is higher than 5-10 microns. Two electrode layers are conductive ink containing graphene micro-sheets with large radial size and nano-silver particles with minimal agglomeration. A dielectric layer is electrospun from nano-fibers. A preparation method for preparing the flexible pressure sensor and a special preparation device are further provided.

Description

technical field [0001] The invention relates to the technical field of graphene composite materials, in particular to a flexible pressure sensor using graphene as an electrode material and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional material composed of carbon atoms with a thickness of only one atom. It has excellent physical and chemical properties, such as excellent mechanical properties, high electrical conductivity, and good thermal conductivity. It is considered to be the most One of the potential nanomaterials. As a one-dimensional carbon nanomaterial, carbon nanofiber has the advantages of good mechanical properties, large specific surface area and good chemical stability. These special properties make it widely used in catalyst supports, polymer nanocomposites, energy Flexible substrate materials for conversion and storage devices, etc. Taking graphene microchip as an example, it not only has good physical properties an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/00G01L9/00
CPCG01L1/00G01L9/00
Inventor 张岩付吉国董伟
Owner 国宏中晶集团有限公司
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