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Graphite-based high-strength heat-conducting epoxy resin adhesive and preparation method thereof

A technology of epoxy resin and adhesive, applied in the direction of epoxy resin glue, adhesive, non-polymer adhesive additive, etc., can solve the problem of poor impact resistance and thermal conductivity of adhesive, and insignificant improvement of thermal conductivity of epoxy resin , the limited effect of epoxy resin reinforcement, etc., to achieve excellent thermal conductivity and mechanical strength, shorten the preparation time, and strong bonding ability.

Inactive Publication Date: 2020-09-04
李磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its wider application is limited due to its unique properties such as high brittleness after curing, poor impact resistance, easy peeling, and low thermal conductivity.
[0003] Chinese Patent Publication No. CN104152095 discloses a two-component epoxy resin adhesive and a preparation method thereof. In the technical scheme of the invention, the adhesive consists of epoxy resin, diluent, polyamide wax, and filler to form component A; The B component composed of 2,4,6-tris(dimethylaminomethyl)phenol, the obtained adhesive has poor impact resistance and thermal conductivity
This technical solution only uses graphene to strengthen epoxy resin, which has a limited effect on the reinforcement of epoxy resin.
[0005] Chinese Patent Publication No. CN110256985 discloses an epoxy-based conductive heat-conducting adhesive and its preparation method. The preparation method first prepares graphene nanosheets with complete structure, and then mixes them with epoxy adhesive to obtain a heat-conducting adhesive. However, graphene nanosheets The sheet is unevenly dispersed in the adhesive, and the thermal conductivity of the epoxy resin is not significantly improved

Method used

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  • Graphite-based high-strength heat-conducting epoxy resin adhesive and preparation method thereof
  • Graphite-based high-strength heat-conducting epoxy resin adhesive and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of modified graphite comprises the following steps:

[0030] Take the graphite powder and place it in a microwave oven for 2 minutes at 1000W for microwave treatment to obtain expanded graphite. Put the expanded graphite into the methylpyrrolidone dispersing solvent according to the mass volume ratio of 1g / 50mL for ultrasonic peeling and dispersing. The ultrasonic peeling and dispersing power is controlled at 700W , ultrasonic peeling and dispersion time is 30h, after centrifugation, washing and drying, graphene is obtained, polyethyleneimine and sodium lauryl sulfate are added to deionized water and stirred to dissolve to obtain polyethyleneimine solution, in which polyethyleneimine The mass ratio of amine, sodium lauryl sulfate, and deionized water is 1:0.05:60. Put the graphene into the polyethyleneimine solution and perform ultrasonic oscillation treatment at 100W power for 10min, and then add the homogeneous mass The n-hexane solution of trim...

Embodiment 2

[0040] The preparation method of modified graphite comprises the following steps:

[0041] Take graphite powder and place it in a microwave oven at 500W for microwave treatment for 5 minutes to obtain expanded graphite. Put the expanded graphite in a methylpyrrolidone dispersion solvent at a ratio of 1g / 50mL by mass to volume for ultrasonic peeling and dispersing. The power of ultrasonic peeling and dispersing is controlled at 800W , ultrasonic peeling and dispersion time is 20h, after centrifugation, washing and drying, graphene is obtained, polyethyleneimine and sodium lauryl sulfate are added to deionized water and stirred to dissolve to obtain polyethyleneimine solution, in which polyethyleneimine The mass ratio of amine, sodium lauryl sulfate, and deionized water is 1:0.05:60. Put graphene into polyethyleneimine solution and perform ultrasonic oscillation treatment at 100W power for 5min, and then add a uniform mass The n-hexane solution of trimesoyl chloride with a conce...

Embodiment 3

[0051] The preparation method of modified graphite comprises the following steps:

[0052] Take graphite powder and place it in a microwave oven for 3 minutes at 800W for microwave treatment to obtain expanded graphite. Put the expanded graphite into a methylpyrrolidone dispersing solvent at a ratio of 1g / 50mL by mass to volume for ultrasonic peeling and dispersing. The power of ultrasonic peeling and dispersing is controlled at 750W , ultrasonic stripping and dispersion time is 25h, after centrifugation, washing and drying, graphene is obtained, polyethyleneimine and sodium lauryl sulfate are added to deionized water and stirred to dissolve to obtain polyethyleneimine solution, in which polyethyleneimine The mass ratio of amine, sodium lauryl sulfate, and deionized water is 1:0.05:60. Put the graphene into the polyethyleneimine solution and perform ultrasonic oscillation treatment at 100W power for 8min, and then add a uniform mass The n-hexane solution of trimesoyl chloride ...

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Abstract

The invention relates to the technical field of adhesives, and discloses a graphite-based high-strength heat-conducting epoxy resin adhesive and a preparation method thereof. The adhesive comprises the following components in parts by weight: bisphenol A type epoxy resin, calcium carbonate, modified graphite, composite glass fibers, 1, 4-butanediol diglycidyl ether, a curing agent polydiphenyl substituted cetane dicarboxylic anhydride, a curing accelerator pyridine and absolute ethyl alcohol. The preparation method comprises the following steps: performing ultrasonic oscillation dispersion onmodified graphite to obtain a graphite suspension; adding bisphenol A epoxy resin, calcium carbonate, composite glass fibers and 1, 4-butanediol diglycidyl ether into the graphite suspension, and uniformly mixing to obtain a premix; and adding polydiphenyl substituted hexadecane dicarboxylic anhydride and pyridine into the premix, pouring into a metal mold, and standing while keeping the temperature, thereby obtaining the graphite-based high-strength heat-conducting epoxy resin adhesive. The adhesive prepared by the method has high mechanical strength and excellent heat-conducting property, and the application range of the epoxy resin adhesive is expanded.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a graphite-based high-strength thermally conductive epoxy resin adhesive and a preparation method thereof. Background technique [0002] Adhesives, also known as adhesives, can tightly bond substances with different varieties and properties, so that the materials can obtain good mechanical properties. Synthetic adhesives with polymer as the main component began to appear in the 1930s. With the rapid development of its important industries such as aerospace, electronics, machinery, and automobiles, more and more attention has been paid to the development, production and application of adhesives. , but different industries have different performance requirements for adhesives. Under the tide of contemporary sustainable development requirements, electronic instruments and equipment are increasingly developing towards integration, miniaturization, high frequency and intelligence, but the lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J11/04C08G59/42
CPCC08G59/4223C08K2003/265C08K2201/011C09J11/04C09J163/00C08K13/06C08K9/00C08K9/04C08K9/08C08K3/04C08K7/14C08K3/041C08K3/26
Inventor 李磊
Owner 李磊
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