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Preparation of a self-sensing composite material adhesive and its self-monitoring method

A composite material and adhesive technology, which is used in the preparation of adhesives, test samples, material impedance, etc., can solve problems such as defects, expensive curing process, affecting the performance of final products, etc., to achieve high accuracy and achieve the effect of full life monitoring.

Active Publication Date: 2021-07-23
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, epoxy adhesives are brittle and prone to micro-cracks inside the matrix during service
The microcracks inside the matrix are not easy to be found by naked eyes. As time goes on, the further expansion of microcracks will eventually lead to the failure of the cemented structure, causing heavy losses to personal safety and property. The curing process will affect the performance of the final product. Conventional means to monitor the curing The process is expensive, complicated, and causes defects, so there is an urgent need to develop a new type of adhesive that can achieve self-monitoring throughout its life

Method used

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  • Preparation of a self-sensing composite material adhesive and its self-monitoring method
  • Preparation of a self-sensing composite material adhesive and its self-monitoring method
  • Preparation of a self-sensing composite material adhesive and its self-monitoring method

Examples

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Effect test

Embodiment 1

[0041] A preparation method of self-sensing composite material adhesive, comprising the following steps:

[0042] Step 1, graphene nanosheet solution preparation:

[0043] (1) Take the graphene intercalation compound and heat it at 700°C for 1.5min to obtain the graphene intercalation compound after thermal expansion;

[0044] (2) add acetone in the graphene intercalation compound after thermal expansion, the two proportioning is acetone: graphene intercalation compound=12:1 after thermal expansion, the unit is ml:g, mix homogeneously, form graphene acetone solution, to The graphene acetone solution is subjected to ultrasonication for 35 minutes, the ultrasonic power is 100W, and during the ultrasonication process, every ultrasonic 2-3s, pause for 1s, and the graphene nanosheet solution is obtained;

[0045] Step 2: Take epoxy resin, add acetone to dissolve completely, mix with graphene nanosheet solution, according to the mass ratio, epoxy resin: graphene = 1; 0.04, continue...

Embodiment 2

[0057] A preparation method of self-sensing composite material adhesive, comprising the following steps:

[0058] Step 1, graphene nanosheet solution preparation:

[0059] (1) Get the graphene intercalation compound and heat it at 650°C for 2min to obtain the graphene intercalation compound after thermal expansion;

[0060] (2) add acetone in the graphene intercalation compound after thermal expansion, the proportioning of the two is acetone: graphene intercalation compound=10:1 after thermal expansion, unit is ml:g, mix homogeneously, form graphene acetone solution, to The graphene acetone solution is subjected to ultrasonication for 50 minutes, the ultrasonic power is 90W, and during the ultrasonication process, every ultrasonic 2-3s, pause for 1s, and the graphene nanosheet solution is obtained;

[0061] Step 2: Take epoxy resin, add acetone to dissolve completely, and mix with graphene nanosheet solution. According to the mass ratio, epoxy resin: graphene = 1; 0.054, cont...

Embodiment 3

[0071] A preparation method of self-sensing composite material adhesive, comprising the following steps:

[0072] Step 1, graphene nanosheet solution preparation:

[0073] (1) Get the graphene intercalation compound and heat it at 800°C for 1min to obtain the graphene intercalation compound after thermal expansion;

[0074] (2) add acetone to the graphene intercalation compound after thermal expansion, the proportioning of the two is acetone: graphene intercalation compound=15:1 after thermal expansion, the unit is ml:g, mix uniformly, form graphene acetone solution, to The graphene acetone solution is subjected to ultrasonication for 20 minutes, the ultrasonic power is 110W, and during the ultrasonication process, every ultrasonic 2-3s, pause for 1s, and the graphene nanosheet solution is obtained;

[0075] Step 2: Take epoxy resin, add acetone to dissolve completely, mix with graphene nanosheet solution, according to the mass ratio, epoxy resin: graphene = 1; 0.046, continu...

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Abstract

The preparation of a self-sensing composite material adhesive and its self-monitoring method of the present invention, the preparation process is: after thermal expansion of the graphene intercalation compound, adding acetone according to the proportion, after mixing and ultrasonic, adding the dissolved epoxy compound according to the proportion Resin, ultrasonically prepared epoxy / graphene mixed solution, heated and cooled at corresponding temperature to obtain epoxy / graphene mixture, added corresponding amount of curing agent, stirred evenly, prepared self-sensing composite material adhesive. During self-monitoring, apply the adhesive into the wire, heat and cure at the corresponding temperature and time, collect the resistance data of the adhesive during the curing process, record the curve of temperature and resistance change rate with time, and obtain the curing information of the composite material adhesive; pull the cured test piece Tensile test, fatigue test and wire resistance change rate records are used to judge the health status, service life and cracks of the adhesive structure. The adhesive prepared by this method can realize whole-life monitoring with high accuracy.

Description

Technical field: [0001] The invention belongs to the technical field, and in particular relates to a preparation of a self-sensing composite material adhesive and a self-monitoring method thereof. Background technique: [0002] Epoxy adhesives are widely used in aerospace, automotive, electronics and other high-end equipment manufacturing industries. However, epoxy adhesives are brittle and prone to micro-cracks inside the matrix during service. The microcracks inside the matrix are not easy to be found by naked eyes. As time goes on, the further expansion of microcracks will eventually lead to the failure of the cemented structure, causing heavy losses to personal safety and property. The curing process will affect the performance of the final product. Conventional means to monitor the curing The process is expensive, complicated, and causes defects, so there is an urgent need to develop a new type of adhesive that can realize self-monitoring throughout its life. Inventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04C09J163/00C09J11/04G01N27/02G01N3/08G01B21/02G01N1/44
CPCC09J11/04C09J163/00G01B21/02G01N1/44G01N3/08G01N19/04G01N27/02C08K3/042
Inventor 孟庆实韩森森王英波于音张硕程陈彩英关芮
Owner SHENYANG AEROSPACE UNIVERSITY
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