A laser method for fabricating strain sensors with different graphene patterns

A strain sensor and graphene technology, applied in the field of strain sensors, can solve the problem that different pattern graphene topological structures cannot be prepared into response sensors, etc., and achieve the effect of low cost

Inactive Publication Date: 2018-08-10
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem in the prior art that graphene topological structures with different patterns cannot be prepared into response sensors, and provide a method for preparing strain sensors with different graphene patterns by laser. The present invention prepares different patterns by using laser The method of graphene topological structure, and then make it into strain sensors with different sensitivities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 Femtosecond laser etching triangular graphene pattern array on polydimethylsiloxane (PDMS)

[0033] Step 1. Preparation of PDMS substrate

[0034] The ratio of DC184 and curing agent is 10:1, stir well to generate air bubbles, put it in an ultrasonic cleaning instrument for 10 minutes, and the air bubbles completely disappear, pour it into a mold (5cm*5cm*1cm) and cure it in an oven at 80°C for 7 hours .

[0035] Step 2. Graphene transfer

[0036] Prepare FeCl with a concentration of 0.5mol / l 3 / HCl solution is used to etch copper, and the graphene / copper foil with an area of ​​1cm*1cm is cut and placed on the surface of the etching solution. After etching for 4 hours, transfer the graphene to deionized water with filter paper, soak for 1 hour, then transfer to new deionized water, and then transfer to the PDMS substrate described in step 1 after soaking for 1 hour.

[0037] Step 3. Laser preparation of patterned graphene

[0038] The graphene / PDMS sur...

Embodiment 2

[0041] Embodiment 2 Femtosecond laser etching circular graphene pattern array on polydimethylsiloxane (PDMS)

[0042] Step 1. Preparation of PDMS substrate

[0043] The ratio of DC184 and curing agent is 10:1, stir well to generate air bubbles, put it in an ultrasonic cleaning instrument for 10 minutes, and the air bubbles completely disappear, pour it into a mold (5cm*5cm*1cm) and cure it in an oven at 80°C for 7 hours .

[0044] Step 2. Graphene transfer

[0045] Prepare FeCl with a concentration of 0.5mol / l 3 / HCl solution is used to etch copper, and the graphene / copper foil with an area of ​​1cm*1cm is cut and placed on the surface of the etching solution. After etching for 4 hours, transfer the graphene to deionized water with filter paper, soak for 1 hour, then transfer to new deionized water, and then transfer to the PDMS substrate described in step 1 after soaking for 1 hour.

[0046] Step 3. Laser preparation of patterned graphene

[0047] The graphene / PDMS surfa...

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Abstract

Provided is a method for preparing a strain transducer with different graphene patterns through laser. The method comprises the following steps that firstly, a flexible transparent rubber substrate is prepared; secondly, a plurality of graphene materials grown through a chemical vapor deposition method are taken, transferred and spread on the flexible substrate prepared in the first step for standby use; thirdly, the graphene on the surface of the flexible transparent substrate forms patterned graphene; and fourthly, two parallel sides of the patterned graphene of the rectangular substrate are each brushed with a layer of silver glue, and the strain transducer is obtained through assembling. According to the method, the characteristic of ultrahigh energy of ultrashort pulse laser is utilized, cold processing for erosion of the graphene can be achieved, that is, carbon keys are directly broken off through laser energy, materials are removed without causing heating, and thus, graphene boundaries with great quality can be obtained; and any designable patterns can be scanned out through cooperation of focusing laser beams and high-speed motion of a galvanometer, and the method is flexible.

Description

technical field [0001] The invention relates to the field of strain sensors, in particular to a method for preparing strain sensors with different graphene patterns by laser. Background technique [0002] The strain sensor is usually a sensor made by using the resistance strain effect, which converts the strain on the specimen into a change in resistance to measure the local deformation, and can be used in many fields such as damage detection, structural characterization, and fatigue testing. The core element of the strain sensor is the resistance strain gauge. After years of development, traditional strain sensors have many advantages such as high sensitivity and low cost, but they still have some inherent shortcomings due to their own structure and other reasons. For example, traditional strain sensors are mostly fixed directional sensors, and strain sensors only It can only be carried out in a specific direction; it has lower resolution at the micro-nano scale, and it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/16
CPCB23K26/355C23F1/18G01B7/18
Inventor 叶晓慧苏孟兴许超
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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