Preparation method of conductive carbon adhesive

A conductive carbon adhesive and temperature control technology, applied in the direction of conductive adhesives, adhesives, epoxy resin adhesives, etc., can solve the problems of low relative density, high cost, affecting the mechanical properties of adhesives, etc., and achieve good compatibility , good mechanical properties

Inactive Publication Date: 2020-06-26
徐文忠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of conductive fillers in general conductive adhesives is more than 50%, which often leads to a substantial increase in the viscosity of the resin matrix of the conductive adhesive, which affects the mechanical properties of the adhesive.
Metal powder is used as a filler, which is expensive and prone to heavy metal pollution; graphite powder has low cost and low relative density, but the prepared conductive adhesive has poor conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention provides a kind of preparation method of conductive carbon glue, comprising the following steps:

[0023] Step 1, get the epoxy resin of 100 weight parts and the dispersant of 3 weight parts, the organic solvent of 1 weight part mix uniformly, obtain the first mixture that viscosity is 500 centipoise;

[0024] Step 2, get 2-5 parts by weight of graphite powder with a particle size less than 20 μm, drop into 100 parts by weight of concentrated sulfuric acid, add 2 parts by weight of sodium nitrate and potassium permanganate of 5 parts by weight while stirring, and control the reaction temperature to be low Stir at 25°C for 30min, then raise the temperature to 40°C and stir for 40min, then add 20 parts by weight of oxalic acid solution, and after the solution turns bright yellow, cool to room temperature to obtain a liquid A containing graphene oxide;

[0025] Step 3, after adding 10 parts by weight of emulsifier and 20 parts by weight of xylene to liquid A ...

Embodiment 2

[0030] The invention provides a kind of preparation method of conductive carbon glue, comprising the following steps:

[0031] Step 1, get the epoxy resin of 100 weight parts and the dispersant of 4 weight parts, the organic solvent of 5 weight parts mix uniformly, obtain the first mixture that viscosity is 1500 centipoise;

[0032] Step 2: Get 4 parts by weight of graphite powder with a particle size less than 20 μm, drop into 100 parts by weight of vitriol oil, add 4 parts by weight of sodium nitrate and potassium permanganate of 8 parts by weight while stirring, and control the reaction temperature below 25 Stir at ℃ for 40 minutes, then raise the temperature to 40 ℃ and stir for 50 minutes, then add 30 parts by weight of oxalic acid solution, and after the solution is bright yellow, cool to room temperature to obtain liquid A containing graphene oxide;

[0033] Step 3, after adding 12 parts by weight of emulsifier and 25 parts by weight of xylene to liquid A in step 2 and ...

Embodiment 3

[0038] The invention provides a kind of preparation method of conductive carbon glue, comprising the following steps:

[0039] Step 1, get the epoxy resin of 100 weight parts and the dispersant of 5 weight parts, the organic solvent of 10 weight parts mix uniformly, obtain the first mixture that viscosity is 2000 centipoise;

[0040] Step 2: Get 5 parts by weight of graphite powder with a particle size less than 20 μm, drop into 100 parts by weight of concentrated sulfuric acid, add 5 parts by weight of sodium nitrate and potassium permanganate of 10 parts by weight while stirring, and control the reaction temperature below 25 Stir at ℃ for 60 minutes, then raise the temperature to 40 ℃ and stir for 60 minutes, then add 40 parts by weight of oxalic acid solution, and after the solution is bright yellow, cool to room temperature to obtain liquid A containing graphene oxide;

[0041] Step 3, after adding 15 parts by weight of emulsifier and 30 parts by weight of xylene to liquid...

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Abstract

The invention discloses a preparation method of a conductive carbon adhesive. The method comprises: step 1, mixing 100 parts by weight of epoxy resin, 3-5 parts by weight of a dispersant, and 1-10 parts by weight of an organic solvent uniformly to obtain a first mixture with a viscosity of 500-2000 centipoises; step 2, preparing a liquid A containing graphene oxide; step 3, preparing a dispersionliquid; step 4, taking the dispersion liquid, and performing spray drying to obtain microsphere powder, namely graphene oxide-polyaniline composite microspheres; and step 5, adding the graphene oxide-polyaniline composite microspheres into the first mixture to obtain the conductive carbon adhesive. According to the invention, the composite microspheres are prepared from graphene oxide and polyaniline and then are used as filler of epoxy resin to prepare the conductive adhesive, and the conductive adhesive has good conductivity, flexibility, tear resistance and the like.

Description

technical field [0001] The invention relates to the technical field of conductive glue preparation, in particular to a preparation method of conductive carbon glue. Background technique [0002] Conductive adhesive is mainly composed of resin matrix, conductive particles, dispersant, additives and so on. The matrix mainly includes epoxy resin, acrylate resin, polyurethane, etc. Most of the conductive adhesives used in the market are filler type. Conventional conductive fillers are generally gold, silver, copper, aluminum, zinc, iron, nickel powder and graphite and some conductive compounds. However, the amount of conductive filler added to conductive adhesives is generally above 50%, which often leads to a substantial increase in the viscosity of the resin matrix of the conductive adhesive, which affects the mechanical properties of the adhesive. Metal powder is used as a filler, which has high cost and is prone to heavy metal pollution; graphite powder has low cost and lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J9/02C08G73/02
CPCC09J163/00C09J9/02C08G73/0266C08L2205/18C08K2201/011C08K2201/001C08L79/02C08K9/10C08K3/042
Inventor 徐文忠
Owner 徐文忠
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