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Preparation method of flexible stress sensor

A stress sensor, flexible technology

Pending Publication Date: 2021-09-03
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are still many deficiencies in the preparation and application of flexible stress sensors, such as poor force-sensitivity, inability to combine flexibility and high sensitivity, and complicated preparation processes, which still seriously hinder the further development of flexible stress sensors.

Method used

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  • Preparation method of flexible stress sensor
  • Preparation method of flexible stress sensor
  • Preparation method of flexible stress sensor

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preparation example Construction

[0019] A flexible stress sensor comprising a conductive sponge and a layer of silver nanowires attached to its surface. A method for preparing a flexible stress sensor provided by an embodiment of the present invention includes the following steps:

[0020] The first step is to clean the conductive sponge. Cut the conductive sponge into a sample of a certain size, put it in deionized water and ultrasonically clean it for 20 minutes, then put it in absolute ethanol for 20 minutes, put the cleaned conductive sponge in a petri dish to dry naturally or put it in the Dry in a vacuum oven at 50°C for 1 hour.

[0021] The second step is the preparation of silver nanowire ethanol solution. Prepare a certain concentration of silver nanowire ethanol solution (0.01mg / ml-5mg / ml), after the preparation, ultrasonic for 10 minutes to fully disperse the silver nanowires in ethanol and stabilize into a uniform solution.

[0022] The third step, drip coating. Evenly drop the dispersed silve...

Embodiment 1

[0026] Submerge the conductive sponge cut into 13mm×13mm in deionized water, and ultrasonically clean it for 20 minutes to clean the impurities on the surface of the conductive sponge. After cleaning with deionized water, immerse in absolute ethanol and ultrasonically clean for 20 minutes. The conductive sponge after ultrasonic cleaning was taken out from absolute ethanol and placed in a vacuum drying oven at 50°C for 20 min. After drying, take it out and let it cool down. Use a 200μl pipette gun to pipette 0.05ml of silver nanowire solution with a concentration of 10mg / ml into a 1.5ml microcentrifuge tube, then use a 1000μl pipette gun to pipette 0.95ml deionized water into the same microcentrifuge tube, and shake the microcentrifuge tube Prepare 1 ml of silver nanowire solution with a concentration of 0.5 mg / ml. Pipette the silver nanowire solution with a concentration of 0.5 mg / ml from the microcentrifuge tube with a pipette gun and evenly drop-coat it on one side of the ...

Embodiment 2

[0029]Submerge the conductive sponge cut into 13mm×13mm in deionized water, and ultrasonically clean it for 20 minutes to clean the impurities on the surface of the conductive sponge. After cleaning with deionized water, immerse in absolute ethanol and ultrasonically clean for 20 minutes. The conductive sponge after ultrasonic cleaning was taken out from absolute ethanol and placed in a vacuum drying oven at 50°C for 20 min. After drying, take it out and let it cool down. Use a 200μl pipette gun to pipette 0.05ml of silver nanowire solution with a concentration of 10mg / ml into a 1.5ml microcentrifuge tube, then use a 1000μl pipette gun to pipette 0.95ml deionized water into the same microcentrifuge tube, and shake the microcentrifuge tube Prepare 1 ml of silver nanowire solution with a concentration of 0.5 mg / ml. Use a pipette gun to pipette the silver nanowire solution with a concentration of 0.5 mg / ml from the microcentrifuge tube and evenly drop-coat it on one side of the...

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Abstract

The invention belongs to the technical field of electronic materials and the field of sensors, and discloses a preparation method of a flexible stress sensor. The method comprises the steps of cleaning of conductive sponge, preparation of a silver nanowire ethanol solution, dispensing and packaging of the sensor. The inherent three-dimensional porous loose structure of the conductive sponge is fully utilized, and the conductive sponge can be deformed when the stress is slightly changed, so that the change of the stress is sensitively sensed, and the sensitivity of the sensor is enhanced; meanwhile, the silver nanowires are combined with the sponge structure, the conductivity is enhanced, and the sensitivity of the sensor is enhanced through the synergistic effect generated by the porous loose structures of the silver nanowires and the conductive sponge.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and the field of sensors, and in particular relates to a preparation method of a flexible stress sensor. Background technique [0002] In recent years, flexible stress sensors based on flexible conductive materials have been widely studied and applied in popular fields such as electronic mobile terminals, medical health monitoring equipment, and intelligent robots. Traditional stress sensing devices are mostly based on metal and semiconductor materials, and their stretchability and sensitivity are greatly limited. Flexible stress sensors not only have the advantages of traditional sensors, but also have good stretchability and sensing properties, so that they can be attached to the surface of human skin and objects with complex structures. [0003] A flexible stress sensor usually includes a base layer, a dielectric layer, an active layer, and electrodes. For flexible stress sensors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14
CPCG01L1/142
Inventor 李秀平张晓琳李倩于福来周锦霞
Owner DALIAN UNIV