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A method for preparing a self-repairing transducer based on a forest-type graphene interwoven network

An interweaving network and graphene technology, applied in the field of graphene, can solve the problems of inability to balance strain resistance and stability, unstable self-healing performance, and failure to use normally.

Active Publication Date: 2017-12-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When a sensor made of flexible materials undergoes multiple large strain deformations, internal damage accumulation is inevitable. Self-healing / self-repairing materials can solve this problem well. However, the current self-healing material sensitive elements, or rely on external Conditions or certain trigger conditions, there is a risk that it cannot be used normally, the self-healing performance is unstable, and the strain resistance and stability cannot be balanced

Method used

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  • A method for preparing a self-repairing transducer based on a forest-type graphene interwoven network
  • A method for preparing a self-repairing transducer based on a forest-type graphene interwoven network
  • A method for preparing a self-repairing transducer based on a forest-type graphene interwoven network

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Embodiment 1

[0040] S1. Cut the forest-like nickel dendrite interwoven network with a dendrite diameter of about 200 μm, a dendrite length of 2000 μm, a thickness of 0.3 mm, and a pore density of 70% to a size of 2*3 cm, such as figure 1 and figure 2 As shown, put it into a mixed solution of equal volume of alcohol and acetone, clean it with ultrasonic waves of 200-400W for 40-80 minutes, rinse it with deionized water repeatedly, and then dry it with argon to obtain a cleaned and dried forest. A nickel dendrite interwoven network template, using the cleaned and dried forest-like nickel dendrite interwoven network as a growth template, using a chemical vapor deposition method, a growth temperature of 1005 ° C, a methane flow of 30 sccm, a hydrogen flow of 10 sccm, a growth time of 25 minutes, and cooling. To room temperature, obtain the forest-like graphene interwoven network grown on the growth template;

[0041] S2. Mix the polydimethylsiloxane and its silane coupling agent uniformly in...

Embodiment 2

[0046] S1. Cut the forest-like nickel dendrite interwoven network with a dendrite diameter of about 10 μm, a dendrite length of 2200 μm, a thickness of 0.5 mm, and a pore density of 90% to a size of 2*3 cm, and put it into an equal volume of alcohol and acetone. In the mixed solution, ultrasonically cleaned at 200-400W for 40-80 minutes, then rinsed repeatedly with deionized water, and then dried with argon to obtain a cleaned and dried forest-like nickel dendrite interwoven network template. The forest-like nickel dendrite interwoven network that was cleaned and dried was used as a growth template, and a chemical vapor deposition method was used, the growth temperature was 1000 ° C, the methane flow rate was 35 sccm, the hydrogen flow rate was 15 sccm, and the growth time was 20 minutes. The forest-like graphene interwoven network on ;

[0047] S2. Mix the polydimethylsiloxane and its silane coupling agent uniformly in a mass ratio of 10:1, naturally level for 10 minutes, and...

Embodiment 3

[0052] S1. Cut the forest-like nickel dendrite interwoven network with a dendrite diameter of about 100 μm, a dendrite length of 2000 μm, a thickness of 0.8 mm, and a pore density of 80% to a size of 2*3 cm, and put in an equal volume of alcohol and acetone. In the mixed solution, ultrasonically cleaned at 200-400W for 40-80 minutes, then rinsed repeatedly with deionized water, and then dried with argon to obtain a cleaned and dried forest-like nickel dendrite interwoven network template. The forest-like nickel dendrite interwoven network that was cleaned and dried was used as a growth template, and a chemical vapor deposition method was used, the growth temperature was 1010 ° C, the methane flow rate was 40 sccm, the hydrogen flow rate was 20 sccm, and the growth time was 20 minutes, and cooled to room temperature to obtain the growth template. The forest-like graphene interwoven network on ;

[0053] S2. Mix the polydimethylsiloxane and its silane coupling agent uniformly in...

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Abstract

The invention discloses a method for preparing a self-repairing transducer based on a forest-type graphene interwoven network and relates to the technical field of graphene. A forest-type nickel dendritic crystal interwoven network is adopted as a growth template, graphene is deposited by a chemical vapor deposition process, and after the graphene is transferred, encapsulation is performed by utilizing flexible colloid to obtain a graphene network having a special forest-type interwoven structure. After the graphene network is utilized to prepare an electrode lead, the strain transducer having a self-healing property is formed. The strain transducer has characteristics of high sensitivity, resistance to large strain, and capability of being repaired after the strain transducer is broken by overloads, and has an application prospect in medical diagnostics, artificial electronic skin, biomorphic robots, flexible touch screens, and the like.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation method of a self-healing sensor based on a forest-like graphene interwoven network. Background technique [0002] The strain sensor is a sensor using the resistance strain effect, which is composed of a resistance strain sensitive element pasted on an elastic element. When the measured physical quantity interacts with the elastic element, the elastic element in the sensor will deform, causing the resistance of the strain sensitive element to change. The resistance signal is converted into a power signal output by a conversion circuit, and the information of the measured physical quantity is obtained by analyzing the power signal. In recent years, sensors using flexible materials have developed rapidly to adapt to the application of sensing in emerging fields such as medical diagnostics, artificial electronic skin, bionic robots, and flexible touch screens. [000...

Claims

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Application Information

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IPC IPC(8): C01B32/186C01B32/194G01B7/16
CPCG01B7/18
Inventor 周建新郭成龙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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