Graphene mica double-layer paper, preparation method and application of paper and mica electric heating plate containing paper or mica electric heating device containing paper

A technology of electric heating equipment and graphene, which is used in electric heating devices, ohmic resistance heating, papermaking, etc., can solve the problems of poor heat dissipation performance of mica paper, affecting the operation and service life of equipment, and inability to dissipate heat from large electric heating equipment. The effect of stable properties and excellent thermal radiation performance

Inactive Publication Date: 2018-11-13
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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Problems solved by technology

[0005] However, although the mica paper currently used in high-performance electric heating equipment such as wind turbines, hydraulic machines, large motors, and electric heating films can meet the standard requirements in terms of mechanical properties, it cannot be used in large electric heating equipment due to the poor heat dissipation performance of the mica paper itself. The heat generated during operation is dissipated in time, which will affect the operation and service life of the equipment

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  • Graphene mica double-layer paper, preparation method and application of paper and mica electric heating plate containing paper or mica electric heating device containing paper

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preparation example Construction

[0043] The preparation of graphene-mica double-layer paper of the present invention mainly comprises the steps such as raw material processing and papermaking and spraying, can specifically refer to as follows:

[0044] (1) Take the mica raw material and ultrasonically crush it for 1-10 hours under the power of 1000-3000W; 12m 3 / h pressure for hydraulic flotation, and then gravity flotation;

[0045] Then, the mica flakes after flotation are further filtered and classified, so that the mica scales contained in the obtained mica slurry have a size distribution between 10 and 150 meshes;

[0046] Further, the mass concentration of the obtained mica slurry is 1-10% (that is, the mass percentage of mica scales in the slurry is 1-10%), preferably 6-8%.

[0047] (2) Get raw graphene powder, and be dispersed in water, then add respectively the dispersant of 20~100% of graphene powder dry mass, and the defoamer of 0.1~1% of graphene powder dry mass, Then dissociate and disperse ev...

Embodiment 1

[0061] (1) Select an area of ​​3mm 2 1. The phlogopite sheet with a thickness of 5mm is used as the mica raw material, and the impurities are removed by winnowing pressure screening, and the mica raw material is stripped into mica sheets by ultrasonic treatment. The ultrasonic power is 1000W and the time is 10h;

[0062] Put the broken mica flakes in an inverted trapezoidal tank at a distance of 10m 3 / h pressure for hydraulic flotation, and then for gravity flotation, filter and classify the mica flakes through a sieving instrument, and obtain mica slurry with a size distribution of mica flakes between 10 and 120 mesh and a mass concentration of 8%;

[0063] (2) Select the biomass graphene powder with a radial size of 30 μm and a thickness of 5 nm and add it to water for dispersion, and then add polyethylene glycol and emulsified with a mass concentration of 20% and 0.1% of the total mass of the graphene powder. Silicone oil; at a rotating speed of 1500rpm, the graphene powd...

Embodiment 2

[0069] (1) Select an area of ​​6mm 2 1. Phlogopite sheets with a thickness of 4mm are used as mica raw materials, and impurities are removed by winnowing and pressure screening, and the mica raw materials are peeled into mica sheets by ultrasonic treatment. The ultrasonic power is 1500W and the time is 8h;

[0070] Place the broken mica sheets in an inverted trapezoidal tank at a distance of 12m 3 / h pressure for hydraulic flotation, and then for gravity flotation, filter and classify the mica flakes through a sieving instrument, and obtain a mica slurry with a size distribution of mica flakes between 10 and 150 mesh and a mass concentration of 6%;

[0071] (2) choose the biomass graphene powder that radial size is 35 μm, thickness is 6nm to join in water and disperse, then add the nanocellulose and hydroxypropyl methyl that mass concentration is respectively graphene powder absolute dry gross mass 40% Base cellulose mixture and 0.2% higher carbon alcohol; under the rotating ...

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Abstract

The invention provides graphene mica double-layer paper, a preparation method and application of the paper and a mica electric heating plate containing the paper or a mica electric heating device containing the paper. The graphene mica double-layer paper is good in heat resistance, nonflammable and resistant to acid and alkali, has good heat dissipation performance and can be applied to the thermoelectric device, heat generated when the electric heating device runs is quickly and evenly dispersed into the surrounding environment through an infrared radiation mode, the reliability of the thermoelectric device during running is improved, and the service life of the thermoelectric device is prolonged. Meanwhile, graphene and mica are used as raw materials, the paper is obtained through mica smashing, separation, papermaking and graphene spraying, and the graphene mica double-layer paper has the advantages that the raw materials are easily obtained, the preparation method involves steps easy and convenient to implement, and the prepared graphene mica double-layer paper has the good heat dissipation performance.

Description

technical field [0001] The invention relates to the field of heat-resistant insulating materials, in particular to a graphene-mica double-layer paper, a preparation method and application thereof, and a mica electric heating plate or electric heating equipment containing the same. Background technique [0002] Mica paper is a paper-based insulating material prepared by modern wet papermaking technology with fine mica scales as the main raw material. It has the advantages of non-toxic, odorless, corrosion resistance, anti-aging, etc. High temperature stability, and has good permeability and air permeability, is one of the most important heat-resistant insulation materials in the insulation products of modern electronics industry, is widely used in electronics, electrical appliances, electromechanical, aviation, aerospace and other civil and military insulation resistance high temperature products. [0003] Mica paper can be impregnated with epoxy resin, silicone resin, etc. ...

Claims

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Application Information

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IPC IPC(8): D21F11/08D21H13/44D21H19/12D21H21/08D21H21/12H05B3/14
CPCD21F11/08D21H13/44D21H19/12D21H21/08D21H21/12H05B3/145
Inventor 韩东王海龙张安
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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