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Preparation method of PDMS sponge-based strain sensor material

A strain sensor and sponge technology, applied in the field of flexible electronic materials, can solve the problems of restricting application and development, failing to meet the urgent needs of high strain sensors, and high manufacturing costs

Inactive Publication Date: 2020-07-07
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional strain sensors are generally composed of metals or inorganic semiconductors, and their detection range is limited (5%), which cannot meet the urgent needs of high-strain sensors.
In addition, the complex preparation process and high manufacturing cost also restrict its application and development.

Method used

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  • Preparation method of PDMS sponge-based strain sensor material
  • Preparation method of PDMS sponge-based strain sensor material
  • Preparation method of PDMS sponge-based strain sensor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step (1), weigh 5g each of white granulated sugar and soft white sugar, put them into a beaker and stir evenly, then add 1ml of deionized water to continue stirring, put the stirred sugar into a cube mold with a side length of 1cm, and then put Dry in an oven for 5 hours to obtain cube sugar.

[0026] Step (2): Weigh an appropriate amount of PDMS raw rubber and curing agent in a ratio of 10:1, place in a beaker and stir vigorously for 5 minutes, use ultrasound to remove the bubbles caused by stirring, and then put the sugar cube prepared in step (1) Immerse in it, and put it in a vacuum drying oven to vacuum for 2 hours, then take it out and put it in an oven at 100°C to cure for 1 hour, and finally put the solidified sugar cube in deionized water. After the sugar cube is fully dissolved, dry it. Get PDMS sponge.

[0027] In step (3), first immerse the PDMS sponge prepared in step (2) in 0.2mg / ml acidic chitosan solution and squeeze 5 times, put it in an oven to dry, a...

Embodiment 2

[0037] Step (1), weigh 5g each of white granulated sugar and soft white sugar, put them into a beaker and stir evenly, then add 1ml of deionized water to continue stirring, put the stirred sugar into a cube mold with a side length of 1cm, and then put Dry in an oven for 5 hours to obtain cube sugar.

[0038] Step (2): Weigh an appropriate amount of PDMS raw rubber and curing agent in a ratio of 10:1, place in a beaker and stir vigorously for 5 minutes, use ultrasound to remove the bubbles caused by stirring, and then put the sugar cube prepared in step (1) Immerse in it, and put it in a vacuum drying oven to vacuum for 2 hours, then take it out and put it in an oven at 100°C to cure for 1 hour, and finally put the solidified sugar cube in deionized water. After the sugar cube is fully dissolved, dry it. Get PDMS sponge.

[0039]In step (3), first immerse the PDMS sponge prepared in step (2) in 0.2mg / ml acidic chitosan solution and squeeze it 5 times, put it in an oven to dry,...

Embodiment 3

[0042] Step (1), weigh 5g each of white granulated sugar and soft white sugar, put them into a beaker and stir evenly, then add 1ml of deionized water to continue stirring, put the stirred sugar into a cube mold with a side length of 1cm, and then put Dry in an oven for 5 hours to obtain cube sugar.

[0043] Step (2): Weigh an appropriate amount of PDMS raw rubber and curing agent in a ratio of 10:1, place in a beaker and stir vigorously for 5 minutes, use ultrasound to remove the bubbles caused by stirring, and then put the sugar cube prepared in step (1) Immerse in it, and put it in a vacuum drying oven to vacuum for 2 hours, then take it out and put it in an oven at 120°C to cure for 1 hour, and finally put the cured sugar cube in deionized water. After the sugar cube is fully dissolved, dry it. Get PDMS sponge.

[0044] In step (3), first immerse the PDMS sponge prepared in step (2) in 0.4mg / ml acidic chitosan solution and squeeze it 5 times, put it in an oven to dry, and...

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Abstract

The invention belongs to the field of flexible electronic materials, in particular to a preparation method of a PDMS sponge-based strain sensor material. The preparation process comprises the following steps: firstly, white granulated sugar and soft white sugar which are common in life are used as raw materials to prepare cube sugar; then PDMS sponge is prepared by taking cube sugar as a sacrificial template; sequentially dip-coating PDMS sponge into the chitosan solution and the graphene oxide dispersion liquid is carried out, and RGO / PDMS sponge is prepared by reducing of using a reducing agent ascorbic acid; finally a layer of silver nanowires (AgNWs) is applied to the RGO / PDMS sponge by using a dispensing method, and drying is conducted to prepare the AgNWs / RGO / PDMS sponge strain sensor material. The strain sensor material disclosed by the invention has good conductivity, the resistance can be obviously changed in compressive strain, meanwhile, the strain sensor material has excellent compression cycle stability, the preparation process is simple and easy to operate, and the strain sensor material is a new material with great development potential in the field of intelligent flexible strain sensors.

Description

technical field [0001] The invention belongs to the field of flexible electronic materials, relates to the preparation of strain sensor materials, and more specifically relates to a preparation method of PDMS sponge-based strain sensor materials. Background technique [0002] With the accelerated development of wearable smart devices, strain sensors have shown good application prospects in the fields of human motion detection, human health monitoring, artificial muscles, and human-machine interfaces. However, conventional strain sensors are generally composed of metals or inorganic semiconductors, and their detection range is limited (5%), which cannot meet the urgent needs of high-strain sensors. In addition, the complex preparation process and high manufacturing cost also restrict its application and development. Therefore, there is an urgent need to develop new types of flexible smart strain sensors. A conductive composite material with a sponge structure assembled from...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08J9/42C08J9/36C08J9/26C08L83/04C08L5/08C08K3/04C08K7/06
CPCC08J9/26C08J9/36C08J9/40C08J9/42C08J2201/0422C08J2383/04C08J2405/08C08K7/06C08K2201/011C08K3/042
Inventor 张卫英董岳峰李晓陈立樟欧阳万军
Owner FUZHOU UNIV
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