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Preparation method of rubber stripping graphene composite conductive rubber

A technology of exfoliating graphene and compound conduction, which is applied in the field of preparing high-performance conductive compound rubber, can solve the problems of difficulty in effectively improving the conduction efficiency of composite materials, inability to effectively reduce the cost of composite materials, and reducing the volume resistivity of compound conductive adhesives. Controllable process and process conditions, abundant raw materials, and the effect of improving product quality

Active Publication Date: 2019-10-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, utilize the high conductivity of nanometer metal particle, graphene sheet layer, prepare conductive glue by the affinity of graphene and resin matrix material, as CN107502257A discloses a kind of preparation method of low-temperature curing high-conductivity slurry and conductive film , using nano-scale silver powder doped with a small amount of graphene as a conductive filler and blended with an organic carrier, it has the advantages of low-temperature curing, high conductivity, high shear strength, and long storage period; the invention of CN106753025A utilizes the high thermal conductivity of graphene With the advantages of low melting point of fibrous metal fillers, the combination of fibrous metal conductive fillers, graphene, thermoplastic polyurethane, sodium lauryl sulfate and mixed solvents improves the conductivity and bonding strength of conductive adhesives; in the above patents, although graphite The addition ratio of graphene is very high, but it is difficult to effectively improve the conductive efficiency of the composite material, nor can it effectively reduce the cost of the composite material; and the huge specific surface area of ​​industrially produced commercially available graphene makes it have extremely high surface energy and surface activity. In the process of preparation, dispersion, drying, storage and transportation, etc., it is very easy to agglomerate and re-graphitize, so it is difficult to make commercially available graphene uniform in the state of single-layer or few-layer graphene by conventional stirring and mixing methods. Dispersed into the matrix of conductive adhesive to form an effective three-dimensional network conductive structure, it is more difficult to achieve a breakthrough in electrical conductivity, and the "percolation effect" of electrical conductivity occurs, which doubles the volume resistivity of the composite conductive adhesive

Method used

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  • Preparation method of rubber stripping graphene composite conductive rubber
  • Preparation method of rubber stripping graphene composite conductive rubber
  • Preparation method of rubber stripping graphene composite conductive rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1 Wetting of flake graphite

[0032] Weigh 20g of dibutyl phthalate into a 500ml beaker, pour 10g of isopropyl alcohol to dilute it, stir well, add 100g of flake graphite, stir evenly, cover with a watch glass, soak for 20h, stir twice during this period, and put it in a microwave oven 120s, transfer to an oven for drying at 105°C to obtain 110g of flake graphite with enhanced wetting of dibutyl phthalate;

[0033] Step 2 Preparation of Graphene Conductive Composite Filler

[0034] Put 100 g of styrene-butadiene rubber on the running counter-roll mill, roll the rubber to wrap the roll and form a stacking glue on the top of the counter-roll, and gradually strengthen the wetting of the flake graphite with dibutyl phthalate prepared in step 1. 110g was added to the stacking rubber and mixed for 10min. During the period, all the wet flake graphite that fell outside the rollers was returned to the stacking rubber on the opposite rollers to form the primary mixed rubber...

Embodiment 2

[0043] Step 1 Wetting of flake graphite

[0044] Weigh 10g of dioctyl phthalate into a 500ml beaker, pour 20g of anhydrous ethanol to dilute it, stir evenly, add 100g of flake graphite, stir evenly, cover with a watch glass, soak for 20h, stir 1-2 times during this period, put it aside Put it in a microwave oven, turn it on for 15s, and transfer it to an oven for drying at 105°C. After cooling, it is bagged for later use to obtain about 109 g of flake graphite reinforced with dioctyl phthalate;

[0045] Step 2 Preparation of Graphene Conductive Composite Fillers

[0046] Put 100g of neoprene rubber on the running counter-roll mill, roll the rubber to wrap the roll, and form a stacking glue on the upper part of the counter-roll, and gradually add 60g of the dioctyl phthalate prepared in step 1 to strengthen the wetting. The flake graphite is continuously mixed for 7 minutes. During this period, all the wetted flake graphite spilled out of the rollers should be returned to the ...

Embodiment 3

[0053] Step 1 Wetting of flake graphite

[0054] Weigh 2g of castor oil into a 500ml beaker, pour 28g of isopropanol to dilute, stir well, add 100g of flake graphite, stir well, cover with a watch glass, soak for 20h, stir 1-2 times during this period, put it in a microwave oven, and turn it on Intensified infiltration for 30s, transferred to an oven for drying at 105°C, cooled, and bagged for later use to obtain 100.6 g of flake graphite intensified and wetted by castor oil;

[0055] Step 2 Preparation of Graphene Conductive Composite Fillers

[0056] Put 100g of nitrile rubber on the running counter-roll mill, roll the rubber to wrap the roll, and form a stacking glue on the top of the counter-roll, and gradually add about 10g of the castor oil prepared in step 1 to strengthen the wetting of the flake graphite. Mixing for 5 minutes, during which all the wet flake graphite spilled out of the rollers should be returned to the accumulated rubber on the opposite rollers to form...

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Abstract

The invention relates to a preparation method of rubber stripping graphene composite conductive rubber. The preparation method comprises the steps that after rubber is mixed with crystalline flake graphite, rubber graphene composite rubber blocks formed by using rubber to strip the crystalline flake graphite are used as conductive reinforcement materials, the graphene rubber blocks are evenly dispersed in a substrate of the conductive rubber through a blending composite technology, and the high-performance series graphene composite conductive rubber material with wide purposes is prepared. Thevolume resistivity can be greatly decreased through the product obtained through the preparation method, the conductivity and the mechanical property of the material are improved exponentially, and the rubber stripping graphene composite conductive rubber has the characteristics that the cost is low, the technology is simple, the efficiency is high, dispersing is uniform, and scale production canbe achieved.

Description

technical field [0001] The invention relates to a method for preparing high-performance conductive composite rubber by using mechanical force to drive rubber molecules to exfoliate graphite (flake graphite, expandable graphite, expanded graphite) as raw materials, and belongs to the field of graphene preparation and application. Background technique [0002] With the development of industrial modernization, the demand for conductive or antistatic products in different fields is more and more extensive, and the requirements for their performance are becoming more and more diverse, such as antistatic rubber, conductive rubber, etc.; With the development in the direction of integration, integration, intelligence and portability, the requirements for electronic packaging technology are also getting higher and higher. The conductive adhesive with adhesive and conductive properties has the advantages of low viscosity, easy use, fine structure for welding, energy saving and environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/06C08L11/00C08L83/04C08L9/02C08L23/16C08K13/02C08K3/04C08K3/22C08K5/09C08K3/08C08K5/3437C08K5/40C08K5/18C08K5/14
CPCC08K2003/0806C08K2003/085C08K2003/2296C08K2201/001C08L7/00C08L9/02C08L11/00C08L23/16C08L83/04C08L2201/04C08L2205/025C08L2205/03C08L9/06C08K13/02C08K3/042C08K3/22C08K5/09C08K3/08C08K5/3437C08K5/40C08K5/18C08K5/14C08K3/04
Inventor 汤庆国刘乃旭王菲王丽梁金生
Owner HEBEI UNIV OF TECH
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