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Extrusion-type interelectrode sulfuration forming and encapsulating method for researching flexible sensor sensitive element

A sensitive unit, vulcanization molding technology, applied in the field of sensors, can solve the problems of difficult precise control of film thickness and uniformity, high contact resistance of sensitive units, concentric distribution of films, etc., to avoid uneven thickness, uniform thickness, good The effect of adhesion

Inactive Publication Date: 2011-04-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two shortcomings in this method: 1. Since the "spin coating method" relies on centrifugal force to form a film, the centrifugal force is different in different parts of the distance from the axis, and the thickness of the film will appear in a concentric circle distribution.
As a result, film thickness and uniformity are difficult to precisely control
2. The sensitive material is vulcanized and then cut and packaged, resulting in excessive contact resistance of the sensitive unit, which affects the performance of the sensor

Method used

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  • Extrusion-type interelectrode sulfuration forming and encapsulating method for researching flexible sensor sensitive element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A. Fix the polyimide film covered with copper foil electrodes on the lower platform of the microcomputer-controlled lifting platform for standby.

[0026] B. Dry single-walled carbon nanotubes with an inner diameter of less than 3 nanometers.

[0027] C. Mix single-walled carbon nanotubes and polydimethylsiloxane at a mass ratio of 0.02:1, and then add n-hexane organic solvent to the single-walled carbon nanotube / polydimethylsiloxane mixture, The volume ratio is 1:40.

[0028] D. Perform high-power mechanical stirring on the mixed solution of single-walled carbon nanotubes / n-hexane / polydimethylsiloxane, supplemented by ultrasonic oscillation, so that the single-walled carbon nanotubes are dispersed in the mixed solution at a temperature of 50 degrees. After the n-hexane is completely volatilized, a single-walled carbon nanotube / polydimethylsiloxane mixture is formed.

[0029] E. Mix the n-hexane and the single-walled carbon nanotube / polydimethylsiloxane mixture at a volume rat...

Embodiment 2

[0035] A. Fix the polyimide film covered with copper foil electrodes on the lower platform of the microcomputer controlled lifting platform for standby.

[0036] B. The contrast surface area is greater than 700m 2 / g of conductive carbon black powder is dried.

[0037] C. Mix the conductive carbon black powder and polydimethylsiloxane at a mass ratio of 0.08:1, and then add n-hexane organic solvent to the carbon black / polydimethylsiloxane mixture with a volume ratio of 1 : 40.

[0038] D. Perform high-power mechanical stirring on the carbon black / n-hexane / polydimethylsiloxane mixed solution, and at the same time assist with ultrasonic oscillation, to disperse the carbon black in the mixed solution at a temperature of 50 degrees, after the n-hexane is completely volatilized , To form a carbon black / polydimethylsiloxane mixture.

[0039] E. Mix the n-hexane and the carbon black / polydimethylsiloxane mixture at a volume ratio of 40:1, and repeat step D.

[0040] F. Repeat step E four time...

Embodiment 3

[0045] A. Fix the polyimide film covered with copper foil electrodes on the lower platform of the microcomputer-controlled lifting platform for standby.

[0046] B. Drying the multi-walled carbon nanotubes with an aspect ratio of 50.

[0047] C. Mix the multi-walled carbon nanotubes and polydimethylsiloxane at a mass ratio of 0.04:1, and then add n-hexane organic solvent to the multi-walled carbon nanotube / polydimethylsiloxane mixture, The volume ratio is 1:40.

[0048] D. Perform high-power mechanical stirring on the mixed solution of multi-walled carbon nanotubes / n-hexane / polydimethylsiloxane, supplemented by ultrasonic vibration, to disperse the multi-walled carbon nanotubes in the mixed solution at a temperature of 50 degrees. After the n-hexane is completely volatilized, a multi-walled carbon nanotube / polydimethylsiloxane mixture is formed.

[0049] E. Mix the n-hexane and the multi-walled carbon nanotube / polydimethylsiloxane mixture at a volume ratio of 40:1, and repeat step D....

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Abstract

The invention relates to an extrusion-type interelectrode sulfonation forming and encapsulating method for researching a flexible sensor sensitive element, belonging to the technical field of sensors. The method comprises the following steps of: dispersing nano conductive powder into a polymeric substrate by utilizing a solution blending method, fully dispersing the nano conductive powder in the polymeric substrate by using a method of repeatedly adding and volatilizing an organic solvent to form nano conductive powder / polymeric material jelly; and coating the jelly between two layers of insulation films covered with electrodes to obtain a film with needed thickness by adopting a microcomputer control extrusion method. The jelly takes favorable adhesion action to the two layers of insulation films in the sulfonation process and is directly sulfonated and formed between the two layers of electrodes. The flexible sensor sensitive element researched by utilizing the forming encapsulating method provided by the invention has the advantages of uniform thickness, little contact resistance, simple process, and the like and is suitable for researching flexible sensor sensitive elements based on a composite conductive polymeric material at low cost.

Description

Technical field [0001] The invention belongs to the technical field of sensors, and particularly relates to the development process of a flexible sensor sensitive unit. Background technique [0002] With the development of science and technology, fields such as national defense and industry urgently need sensors with thin and flexible characteristics. Nano conductive polymer composites have good flexibility under appropriate conductive phase concentration. The conductive network formed by the conductive phase in the polymer matrix changes regularly under the action of pressure or deformation. Therefore, this composite material can be used as a sensitive material for flexible pressure / displacement sensors. Many scientific research institutions at home and abroad use the "spin coating method" to prepare pressure sensitive units based on conductive polymer composites. The specific method uses plexiglass as a rotating chassis and a small motor provides rotation power. By controllin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/00G01B7/02
Inventor 王璐珩王雪婷马芳芳刘黄海贾世军时千舒
Owner NORTHEASTERN UNIV
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