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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  • Summary
  • Abstract
  • Description
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AI Technical Summary

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 propertie

Method used

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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

Examples

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Example Embodiment

[0043] The preparation of the graphene mica double-layer paper of the present invention mainly includes the steps of raw material processing, papermaking and spraying, etc., which can be specifically referred to as follows:

[0044] (1) Take the mica raw material and ultrasonically crush it for 1-10h under the power of 1000~3000W; then, the mica flakes that are hydraulically crushed are subjected to flotation, that is, the mica flakes after the crushing are poured into a water tank for 10~ 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 flake diameters of the mica flakes contained in the obtained mica slurry are distributed between 10 and 150 mesh;

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

[0047] (2) Take raw graphene powder and disperse it ...

Example Embodiment

[0060] Example 1:

[0061] (1) The selected area is 3mm 2 , Phlogopite flakes with a thickness of 5mm are used as mica raw materials, the impurities are removed by air separation pressure screening, and the mica raw materials are stripped into mica flakes by ultrasonic treatment, the ultrasonic power is 1000W, and the time is 10h;

[0062] Place the crushed mica flakes in an inverted trapezoidal tank at 10m 3 Perform hydraulic flotation at a pressure of / h, and then gravity flotation. The mica flakes are filtered and classified by a sieving instrument to obtain mica slurry with mica flake sizes ranging from 10 to 120 meshes and a mass concentration of 8%;

[0063] (2) Select the biomass graphene powder with a radial size of 30μm and a thickness of 5nm to be dispersed in water, and then add polyethylene glycol with a mass concentration of 20% and 0.1% of the total dry mass of the graphene powder and emulsify Silicone oil; at a speed of 1500rpm, use a ball mill to dissociate and disper...

Example Embodiment

[0068] Example 2:

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

[0070] Place the crushed mica flakes in an inverted trapezoidal tank at a distance of 12m 3 Perform hydraulic flotation at a pressure of / h, and then gravity flotation. The mica flakes are filtered and classified by a sieving instrument to obtain mica slurry with mica flake sizes ranging from 10 to 150 meshes and a mass concentration of 6%;

[0071] (2) Select the biomass graphene powder with a radial size of 35μm and a thickness of 6nm to be dispersed in water, and then add nanocellulose and hypromellose with a mass concentration of 40% of the absolute dry mass of the graphene powder. Base cellulose mixture and 0.2% higher alcohol; at 2000 rpm, use a ball mill ...

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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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