A three-dimensional graphene composite material that can be used as a strain sensor and its preparation method

A composite material and graphene technology, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement device, etc., can solve the problems of easy damage, poor designability of strain sensor, high expansion rate and sensitivity, etc., so as to avoid structural damage , Improve the effect of structural stability

Active Publication Date: 2021-04-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Considering that the structure of three-dimensional graphene is easily damaged during repeated straining, it has been reported [(1) Li et al.ACS Appl. Mater. Interfaces 2016,8,(29),18954-18961. al.Adv.Funct.Mater.2015,25,(27),4228-4236.] Directly embed graphene into highly elastic PDMS to increase its structural stability, but the designability of the strain sensor prepared in this way is poor , can not reach a higher level in terms of scalability and sensitivity

Method used

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  • A three-dimensional graphene composite material that can be used as a strain sensor and its preparation method
  • A three-dimensional graphene composite material that can be used as a strain sensor and its preparation method
  • A three-dimensional graphene composite material that can be used as a strain sensor and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0040] (1) ethylene glycol butyl ether and dibutyl phthalate are mixed as a dispersant with a mass ratio of 2:1, and then graphene and a dispersant are added in ethanol with a mass ratio of 1:1, wherein graphene The mass ratio with ethanol is 1:150, and then ultrasonic 2h under 200W power, obtains the graphene suspension that disperses uniformly; Then add PDMS and solidifying agent that mass ratio is 10:1 to suspension (solidifying agent and PDMS produce From the same manufacturer, used together), ultrasonicated for 2 hours at 200W power, in which the mass ratio of graphene to PDMS was 1:5; after being uniformly mixed, placed in a ventilated place to dry naturally, and the printing paste was obtained after the ethanol was completely volatilized;

[0041] (2) Transfer the slurry to the printing tube, and import it into the computer control terminal with a size of 10×10×8mm 3 The block model is then superimposed layer by layer to print out the sample of the three-dimensional str...

Embodiment 2

[0044] (1) ethylene glycol butyl ether and dibutyl phthalate are mixed as a dispersant with a mass ratio of 2:1, and then graphene and a dispersant are added in ethanol with a mass ratio of 1:1, wherein graphene The mass ratio with ethanol is 1:150, and then ultrasonic 2h under 200W power, obtains the graphene suspension that disperses uniformly; Then add PDMS and solidifying agent that mass ratio is 10:1 to suspension (solidifying agent and PDMS produce From the same manufacturer, used together), ultrasonicated for 2 hours at 200W power, in which the mass ratio of graphene to PDMS was 1:6; after being uniformly mixed, placed in a ventilated place to dry naturally, and the printing paste was obtained after the ethanol was completely volatilized;

[0045] (2) Transfer the slurry to the printing tube, and import it into the computer control terminal with a size of 10×10×8mm 3 The block model is then superimposed layer by layer to print out the sample of the three-dimensional str...

Embodiment 3

[0048] (1) ethylene glycol butyl ether and dibutyl phthalate are mixed as a dispersant with a mass ratio of 2:1, and then graphene and a dispersant are added in ethanol with a mass ratio of 1:1, wherein graphene The mass ratio with ethanol is 1:150, and then ultrasonic 2h under 200W power, obtains the graphene suspension that disperses uniformly; Then add PDMS and solidifying agent that mass ratio is 10:1 to suspension (solidifying agent and PDMS produce From the same manufacturer, used together), ultrasonicated for 2 hours at 200W power, in which the mass ratio of graphene to PDMS was 1:7; after being uniformly mixed, placed in a ventilated place to dry naturally, and the printing paste was obtained after the ethanol was completely volatilized;

[0049] (2) Transfer the slurry to the printing tube, and import it into the computer control terminal with a size of 10×10×8mm 3 The block model is then superimposed layer by layer to print out the sample of the three-dimensional str...

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Abstract

The invention relates to a three-dimensional graphene composite material that can be used as a strain sensor and a preparation method thereof. A preparation method of a three-dimensional graphene / PDMS composite material, comprising: dispersing graphene and a dispersant in a solvent to obtain a graphene suspension; adding polydimethylsiloxane PDMS and a curing agent to the graphene suspension , mixed and dried to obtain a printing slurry; using a 3D printing process, the printing slurry is superimposed and printed layer by layer to obtain a three-dimensional structure sample; after the obtained sample is cured, the three-dimensional graphene / PDMS composite material is obtained.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional graphene composite material that can be used as a strain sensor by using 3D printing, and belongs to the field of graphene sensors. Background technique [0002] A strain sensor is a device that has characteristics such as bending and stretching, and a real-time electrical response to external deformation. According to different working principles, it can be divided into three categories: piezoelectric, capacitive, and resistive. Among them, the resistive strain sensor is a type of sensor that converts the stimulus of strain into the change of resistance value. Traditional research on resistive sensors mainly focuses on metals, semiconductors, and conductive polymers. However, the low strain sensitivity and small expansion rate of these types of materials have prompted researchers to turn their attention to low-dimensional carbon materials. As a kind of low-dimensional carbon materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K3/04G01B7/16
CPCC08K3/042G01B7/18C08L83/04
Inventor 杨金山黄凯董绍明张翔宇高乐
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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