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Surface insulation coated carbon fiber and preparation method thereof as well as heat-conducting gasket and preparation method thereof

A technology of insulating coating and thermally conductive gasket, which is applied in the direction of carbon fiber, fiber treatment, chemical instruments and methods, etc., can solve the problems of carbon fiber not being able to conduct heat, affecting the normal operation of electronic equipment, and discounting thermal conductivity efficiency, etc., to achieve excellent insulation effect of effect

Inactive Publication Date: 2019-09-13
SHENZHEN HFC SHIELDING PRODS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the preparation process, when the carbon fiber is completely inside the silica gel pad, the thermal conductivity efficiency will be greatly reduced, and the advantages of carbon fiber heat conduction will not be fully utilized; when the end face of the carbon fiber protrudes from the surface of the thermal pad, although the thermal conductivity of the material has been greatly improved , but the carbon fiber exposed on the surface will cause short circuit of electronic components, which will affect the normal operation of electronic equipment

Method used

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preparation example Construction

[0042] A method for preparing carbon fiber with surface insulation coating, comprising

[0043] Carbon fiber surface activation step: using a muffle furnace to heat-treat the surface of the carbon fiber substrate to enhance the activity of the surface of the carbon fiber substrate to obtain activated carbon fibers;

[0044] The step of forming an insulating coating: adding the above-mentioned activated carbon fiber to the insulating material, stirring evenly, forming a layer of uniform and stable insulating coating on the surface of the carbon fiber substrate under the action of the initiator, and obtaining the insulating coating after suction filtration carbon fiber;

[0045] Baking step: transfer the above-mentioned insulation-coated carbon fiber to an oven for baking.

[0046] As a further solution, the insulating coating of the present invention can be SiO 2 An insulating coating uniformly covering the surface of the carbon fiber substrate is formed on the carbon fiber s...

Embodiment 1

[0078] A method for preparing carbon fiber with surface insulation coating, comprising

[0079] Carbon fiber surface activation step: use a muffle furnace to heat-treat the surface of the carbon fiber substrate at 800°C for a treatment time of 10 hours to enhance the activity of the surface of the carbon fiber substrate and obtain activated carbon fibers;

[0080] The steps of forming an insulating coating: weigh 30g of the above-mentioned carbon fiber and place it in a beaker, measure 50ml of tetraethyl orthosilicate and 100ml of absolute ethanol, and pour the tetraethyl orthosilicate and absolute alcohol into the beaker through the drainage of the glass rod During the stirring process, the stirring process is carried out on the heating platform. The temperature of the heating platform is set at 20°C, the stirring speed is 1500rpm, and the stirring time is 4h. When the carbon fiber is uniformly mixed in the solution, drop Add ammonia water as a catalyst, the amount of ammonia...

Embodiment 2

[0083] A method for preparing carbon fiber with surface insulation coating, comprising

[0084]Carbon fiber surface activation step: Use a muffle furnace to heat-treat the surface of the carbon fiber substrate at 500°C for 12 hours to enhance the activity of the surface of the carbon fiber substrate and obtain activated carbon fibers;

[0085] The step of forming an insulating coating: weigh 50g of the above-mentioned carbon fiber and place it in a beaker, measure 80ml of tetraethyl orthosilicate and 400ml of absolute ethanol, and pour the tetraethyl orthosilicate and absolute alcohol into the beaker through the drainage of the glass rod During the stirring process, the stirring process is carried out on the heating platform. The temperature of the heating platform is set at 50°C, the stirring speed is 1500rpm, and the stirring time is 4h. When the carbon fiber is uniformly mixed in the solution, drop Add ammonia water as a catalyst, the amount of ammonia water added is 100ml,...

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Abstract

The invention discloses carbon fiber subjected to insulation treatment. The carbon fiber comprises a carbon fiber base material and an insulating coating formed on the surface of the carbon fiber basematerial. The carbon fiber provided by the invention has high insulating property and can effectively avoid the bad influence of the carbon fiber in application of electronic components. The invention also discloses a preparation method of the surface insulation coated carbon fiber, a heat-conducting gasket comprising the carbon fiber as well as a preparation method of the heat-conducting gasket.The heat-conducting gasket provided by the invention performs directional flocking on the carbon fiber with insulating effect in the manufacturing process, so the heat-conducting gasket has the effects of anisotropy, high heat conductivity, high insulating property and the like.

Description

technical field [0001] The invention relates to the technical field of powder material surface treatment and thermal interface material preparation, in particular to a carbon fiber through insulation treatment, a method thereof and a thermal pad containing the carbon fiber. Background technique [0002] Carbon fiber (CF for short) is a new type of polymer material with a carbon content of more than 90% formed by decomposition and carbonization of organic fibers at high temperatures (1000-3000°C) under the protection of inert gases. Its strength is higher than that of steel, and its density is lower than that of aluminum. It has excellent characteristics such as light weight, high strength, high elastic modulus, high and low temperature resistance, corrosion resistance, and fatigue resistance. High application value, known as the black gold of the 21st century. [0003] With the rapid development of modern science and technology, carbon fiber has made great progress in the p...

Claims

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Application Information

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IPC IPC(8): D06M11/79C08L83/07C08L83/04C08K13/06C08K9/10C08K7/06C08K3/22C09K5/14D06M101/40
CPCC08K2003/2227C08L83/04C08L2205/025C09K5/14D06M11/79D06M2101/40C08K13/06C08K9/10C08K7/06C08K3/22
Inventor 曹勇方晓谢佑南羊尚强
Owner SHENZHEN HFC SHIELDING PRODS CO LTD
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