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Method for developing flexible pressure sensitive probe with side electrode

A side-mounted, soft technology, applied in the field of sensors, can solve the problems of reduced softness and inapplicability of the sensitive probe part of the sensor, and achieve the effects of saving development costs, reducing development costs, and reducing contact resistance

Inactive Publication Date: 2011-08-03
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although both the insulating packaging layer and the sensitive material layer have flexibility, due to the existence of rigid metal electrodes, the flexibility of the sensitive probe part of the sensor is greatly reduced, so it cannot be applied between layers of curved surfaces with a large degree of curvature.

Method used

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  • Method for developing flexible pressure sensitive probe with side electrode
  • Method for developing flexible pressure sensitive probe with side electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A. After drying the multi-walled carbon nanotubes with a diameter of 20-40 nanometers and a length of 5-15 microns, mix them with room temperature vulcanized silicone rubber in a mass ratio of 0.03:1, and add n-hexane solvent in a volume ratio of 1 : 40. The mixed solution of multi-walled carbon nanotubes / room temperature vulcanized silicone rubber / n-hexane solvent is subjected to high-power mechanical stirring, and at the same time, it is supplemented by ultrasonic oscillation to disperse the multi-walled carbon nanotubes in the mixed solution. Under the action of dibutyltin dilaurate and ethyl orthosilicate, a multi-walled carbon nanotube / room temperature vulcanized silicone rubber gel-like sticky substance is formed.

[0021] B. Place a metal sheet with a thickness of 20 microns and a width of 0.2 cm on a smooth and rigid flat plate as the lower electrode, and place it on the lower platform of the microcomputer-controlled lifting platform. Spread the jelly prepared ...

Embodiment 2

[0024] A, after drying the nano-carbon black with a specific surface area of ​​780 square meters per gram, mix it with room temperature vulcanized silicone rubber in a mass ratio of 0.08:1, and add n-hexane solvent, and the volume ratio is 1:60. The nano-carbon black / room temperature vulcanized silicone rubber / n-hexane solvent mixed solution is mechanically stirred with high power, and at the same time, it is supplemented by ultrasonic vibration to disperse the nano-carbon black in the mixed solution. Under the action of dibutyltin dilaurate and ethyl orthosilicate, a nano-carbon black / room temperature vulcanized silicone rubber colloidal sticky substance is formed.

[0025] B. Place a metal sheet with a thickness of 20 microns and a width of 0.25 cm on a smooth and rigid flat plate as the lower electrode, and place it on the lower platform of the microcomputer-controlled lifting platform. Spread the jelly prepared in step A evenly on a smooth and rigid flat plate, and make th...

Embodiment 3

[0028] A, after drying the graphene with a specific surface area of ​​50 square meters per gram, mix it with room temperature vulcanized silicone rubber in a mass ratio of 0.04:1, and add n-hexane solvent, and the volume ratio is 1:50. The graphene / room temperature vulcanization silicone rubber / n-hexane solvent mixed solution is subjected to high-power mechanical stirring, and at the same time, it is assisted by ultrasonic vibration to disperse the graphene in the mixed solution. Under the action of dibutyltin dilaurate and tetraethyl orthosilicate, a graphene / room temperature vulcanized silicone rubber gel-like sticky substance is formed.

[0029] B. Place a metal sheet with a thickness of 20 microns and a width of 0.15 cm on a smooth and rigid flat plate as the lower electrode, and place it on the lower platform of the microcomputer-controlled lifting platform. Spread the jelly prepared in step A evenly on a smooth and rigid flat plate, and make the length of the overlapping...

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Abstract

The invention relates to a method for developing a flexible pressure sensitive probe with a side electrode and belongs to the technical field of sensors. The probe consists of a sensitive area, a conductive area and an interface area, wherein the sensitive area and the conductive area both have a three-layer flexible structure of which the middle layer is made of a conductive polymer composite material and of which the outmost two layers are insulated packaging thin films; and the interface area has a five-layer structure of which the middle layer is made of the conductive polymer composite material, of which the two sub outer layers are connected with a subsequent circuit, and of which the two outmost layers are insulated packaging thin films. The conductive polymer composite material is prepared by dispersing nano conductive powder into a polymer substrate by using a solution mixing process. The insulated packaging thin film is prepared by vulcanization forming of a liquid polymer material in the presence of a catalyst and a crosslinking agent. The pressure sensitive probe developed by the method provided by the invention has no rigid electrodes in the sensitive area and the conductive area, has the advantages of high flexibility, small thickness, simple structure, simple process, low cost and the like, and is particularly suitable for measuring pressure and displacement between curved surface layers.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a soft sensor development process. Background technique [0002] With the development of science and technology, the fields of defense and industry need sensors that can be used to measure the pressure and displacement between layers of narrow curved surfaces. However, due to the narrow interlayer gap and irregular contact surface, it brings difficulties to the installation of traditional rigid sensors. Therefore, there is an urgent need for a thin and flexible sensor that can be flexibly attached between curved surface layers to complete the measurement tasks of pressure and displacement. [0003] The nano conductive polymer composite material has good processability and flexibility under the appropriate concentration of conductive phase. Moreover, the conductive network formed by the conductive phase in the polymer matrix changes regularly under pressure or deform...

Claims

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Application Information

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IPC IPC(8): G01L1/16
Inventor 王璐珩马芳芳王雪婷刘黄海
Owner NORTHEASTERN UNIV
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