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A kind of directional heat conduction insulation material and preparation method thereof

A technology of directional thermal conduction and thermal insulation materials, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of uneven temperature distribution on the surface of thermal protection materials, low thermal insulation efficiency, etc., and achieve better thermal insulation performance. , the size and shape can be adjusted, the process is simple and easy to implement

Active Publication Date: 2022-04-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the temperature distribution on the surface of the thermal protection material is uneven and the heat insulation efficiency is low. Aiming at the deficiencies in the prior art, a directional heat conduction heat insulation material and its preparation method are provided to ensure that the material is in the direction of thickness. It has high in-plane thermal conductivity as well as ground thermal conductivity, thereby improving the thermal insulation efficiency of the material itself

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  • A kind of directional heat conduction insulation material and preparation method thereof
  • A kind of directional heat conduction insulation material and preparation method thereof

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Embodiment 1

[0046] This embodiment provides a multi-layer directional heat-conducting and heat-insulating material, which is composed of viscose-based carbon fibers, high-thermal-conducting carbon fibers, and adhesives.

[0047] Viscose-based carbon fiber is the matrix, and the fiber length is less than 1mm. High thermal conductivity carbon fiber is used as a thermal conductivity reinforcement, using a cylindrical mold with a diameter of 60mm, and the content of each layer of high thermal conductivity carbon fiber is 0.4g. The adhesive is phenolic resin powder.

[0048] Concrete preparation method steps are as follows:

[0049] (1) Add 7g of viscose-based carbon fiber into 350g of deionized water, stir and disperse evenly with a mechanical stirrer, pour the stirred dispersion into a beaker, the stirrer speed is 700r / min, and the stirring time is 20min to obtain a dispersed Solution I: add 0.4g of high thermal conductivity carbon fiber into 20g of deionized water, stir evenly with a mech...

Embodiment 2

[0056] This embodiment provides a multi-layer directional heat-conducting and heat-insulating material, which is composed of viscose-based carbon fibers, high-thermal-conducting carbon fibers, and adhesives.

[0057] Viscose-based carbon fiber is the matrix, and the fiber length is less than 1mm. High thermal conductivity carbon fiber is used as a thermal conductivity reinforcement, using a cylindrical mold with a diameter of 60mm, and the content of each layer of high thermal conductivity carbon fiber is 0.4g. The adhesive is phenolic resin powder.

[0058] Concrete preparation method steps are as follows:

[0059] (1) Add 7g of viscose-based carbon fiber into 350g of deionized water, stir and disperse evenly with a mechanical stirrer, pour the stirred dispersion into a beaker, the stirrer speed is 700r / min, and the stirring time is 20min to obtain a dispersed Liquid I: add 0.8 g of high thermal conductivity carbon fiber to 40 g of deionized water, and stir evenly with a me...

Embodiment 3

[0066] This embodiment provides a multi-layer directional heat-conducting and heat-insulating material, which is composed of viscose-based carbon fibers, high-thermal-conducting carbon fibers, and adhesives.

[0067] Viscose-based carbon fiber is the matrix, and the fiber length is less than 1mm. High thermal conductivity carbon fiber is used as a thermal conductivity reinforcement, using a cylindrical mold with a diameter of 60mm, and the content of each layer of high thermal conductivity carbon fiber is 0.4g. The adhesive is phenolic resin powder.

[0068] Concrete preparation method steps are as follows:

[0069] (1) Add 7g of viscose-based carbon fiber into 350g of deionized water, stir and disperse evenly with a mechanical stirrer, pour the stirred dispersion into a beaker, the stirrer speed is 700r / min, and the stirring time is 20min to obtain a dispersed Liquid I: add 1.2g of high thermal conductivity carbon fiber into 60g of deionized water, stir evenly with a mechan...

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Abstract

The present invention relates to the technical field of thermal protection, and provides a directional heat-conducting heat-insulating material and a preparation method thereof. The preparation method comprises the following steps: (1) dispersing viscose-based carbon fibers in water, adding phenolic resin and polyacrylamide in sequence , to obtain dispersion I; disperse high thermal conductivity carbon fibers in water, add phenolic resin and polyacrylamide in turn to obtain dispersion II; (2) divide dispersion I and dispersion II into several parts respectively, and divide each part The dispersion I and each dispersion II are alternately poured into the mold until all the dispersion I and dispersion II are poured out, and each time a dispersion I or dispersion II is poured, water is drained once to obtain a porous carbon fiber skeleton. After curing, a preform is obtained; (3) heat-treating the preform obtained in step (2) to obtain the directional heat conduction and heat insulation material, the directional heat conduction heat insulation material of the present invention has good heat insulation performance.

Description

technical field [0001] The invention relates to the technical field of heat protection, in particular to a directional heat conduction and heat insulation material and a preparation method thereof. Background technique [0002] The thermal protection system (TPS) is considered as a key structure to prevent aerodynamic heating during launch and reentry of high-speed aircraft. Insulation is an important part of a thermal protection system that prevents the transfer of heat from the outside to the inside. At present, ceramic thermal insulation tiles and composite aerogels are selected as large-area thermal protection materials. In order to solve the brittleness of ceramic tiles, carbon bonded carbon fiber (CBCF) composites are widely used in TPS as a new type of insulation material. CBCF consists of a backbone of chopped carbon fibers with a density as low as 0.1-0.5g / cm 3 , the porosity is as high as 70-90%, and it has excellent high temperature resistance and heat insulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/14
CPCC09K5/14C08L61/06B29C39/123B29C39/42C08K3/04F16L59/02B29K2061/04B29K2507/04B29K2995/0013C08K2201/001F16L59/029
Inventor 徐宝升王晨琪曲立杰陈彦飞方岱宁杨亚政
Owner BEIJING INSTITUTE OF TECHNOLOGYGY