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A kind of graphene conductive masterbatch and preparation method thereof

A technology of graphene and masterbatch, which is applied in the field of graphene conductive masterbatch and its preparation, can solve the problems of low conductivity of conductive masterbatch, poor dispersion of graphene, high risk of use, etc., and achieve significant market application value and easy storage , The effect of safety improvement

Inactive Publication Date: 2018-11-30
江苏德源材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, most of the graphene conductive masterbatches obtained by mechanical direct peeling use graphene dry powder as raw material, which has high cost and high risk of use. The dispersion of graphene in the prepared conductive masterbatch is poor, resulting in the conductivity of the conductive masterbatch. Low, low yield technical problems, the present invention proposes a graphene conductive masterbatch and its preparation method, through the screw extruder, graphite and hot-melt materials are subjected to strong shear force in the state of hot-melt colloid, to obtain a A kind of graphene conductive masterbatch, the conductive masterbatch prepared by the present invention can be used as the additive of conductive paint, the dispersibility of graphene in conductive masterbatch is good, can not agglomerate or sink, after making masterbatch, easy to store, safe sexual enhancement

Method used

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  • A kind of graphene conductive masterbatch and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Flake graphite with a mass percentage of 15 and a particle size of 10 mm and a mass percentage of 0.1 sodium lauryl sulfate and an EVA hot melt adhesive with a mass percentage of 84.9 and a particle size of 3 mm were mixed in a high-speed mixer with Mix and disperse at a speed of 600 rpm for 10 minutes to obtain a premix;

[0035] (2) Put the premix obtained in step (1) into the strong shear screw extruder. The feed end is provided with conveying crushing section, stripping section and stirring section successively. When the screw rod rotates at a rotating speed of 100rpm, in the conveying section, the second pitch of the thread of conveying the crushing section is 8cm, and the lead angle of the thread is 45°. When the temperature is 120°C, the particle size of the graphite raw material in the premix is ​​reduced to less than 1mm, and it is gradually transported forward together with the hot melt material;

[0036] Such as figure 1As shown, in the stripping sectio...

Embodiment 2

[0041] (1) Put expanded graphite with a mass percentage of 20 and a particle size of 8 mm, and EVA hot melt adhesive with a mass percentage of 0.5 and a mass percentage of 79.5 and a particle size of 10 mm in a high-speed mixer Mix and disperse at a speed of 800 rpm for 15 minutes to obtain a premix;

[0042] (2) Put the premix obtained in step (1) into the strong shear screw extruder. The feed end is provided with conveying crushing section, stripping section, and stirring section successively. When the screw rod rotates at a speed of 400 rpm, in the conveying section, the second pitch of the conveying crushing section thread is 9 cm, and the lead angle of the thread is 50°. When the temperature is 130°C, the particle size of the graphite raw material in the premix is ​​reduced to less than 1mm, and it is gradually transported forward together with the hot melt material;

[0043] In the stripping section, the first pitch of the thread in the stripping section is 4cm, and the...

Embodiment 3

[0048] (1) Highly oriented graphite with a mass percentage of 24 and a particle size of 6 mm and sodium dodecylbenzenesulfonate with a mass percentage of 0.5 and PA hot melt adhesive with a mass percentage of 75.5 and a particle size of 20 mm are mixed at high speed Mix and disperse in the machine at a speed of 1000 rpm for 20 minutes to obtain a premix;

[0049] (2) Add the premix obtained in step (1) into the strong shear screw extruder. The section of the flight of the strong shear screw machine is a rectangular structure. The feed end is provided with conveying crushing section, stripping section and stirring section successively. When the screw rod rotates at a speed of 800rpm, in the conveying section, the second pitch of the thread of conveying the crushing section is 9cm, and the lead angle of the thread is 55°. When the temperature is 130°C, the particle size of the graphite raw material in the premix is ​​reduced to less than 1mm, and it is gradually transported forw...

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Abstract

The invention provides a graphene conductive master batch and a preparation method of the graphene conductive master batch. A strong-shear screw extruder with shear teeth is adopted, graphene raw materials are evenly mixed with a hot melt material, graphite is peeled to be graphene through the strong shear effect of the shear teeth, the graphene is evenly dispersed in the rotation direction of a screw, an evenly-dispersed graphene melt is obtained, and finally the graphene conductive master batch is obtained through extrusion and pelleting. By means of the method, the technical problems that as graphene dry powder is adopted as a raw material to prepare a graphene conductive master batch in the prior art, the production cost is high, the using risk is high, dispersity of graphene in the prepared conductive master bath is poor, and the yield is low are solved, the technical effects that the production cost is greatly reduced, meanwhile, the dispersity of graphene in the master bath is improved and efficient utilization of graphene is easy are achieved, further, the raw materials and the product are easy to store, and safety is high.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to a graphene conductive masterbatch and a preparation method thereof. Background technique [0002] In order to protect the insulation layer of power transmission cables from damage caused by the concentration of electric field stress, and to suppress induced charges, in power transmission cables, ethylene-propylene rubber and polyvinyl chloride are used as the rated voltage above 3.6 / 6.6 (7.2) kV. Cables with insulating layers, and cables with rated voltage above 1.8 / 3.0(3.6)kV that use cross-linked polyethylene and polyethylene as insulating layers should have conductor shielding and insulating shielding layers. A layer of semi-conductive shielding layer is designed on the inner and outer sides of the insulating layer respectively. The quality of the semi-conductive shielding material plays a vital role in the safety and service life of the cable. The composite materials used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/60B29B9/06B29K507/04
CPCB29B9/06B29C48/59B29K2507/04
Inventor 陈庆曾军堂王镭迪
Owner 江苏德源材料科技有限公司