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Preparation method of heat insulation material and heat insulation material prepared by method

A technology of thermal insulation materials and composite materials, applied in textiles and papermaking, fiber processing, non-woven fabrics, etc., can solve problems such as inapplicable application scenarios, achieve good dimensioning ability, high anti-oxidation ability, and improve thermal insulation performance Effect

Active Publication Date: 2019-12-31
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Multiple impregnations endow the material with higher strength, but also greatly increase the density of the material, which is not suitable for application scenarios that require light weight of the material

Method used

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  • Preparation method of heat insulation material and heat insulation material prepared by method
  • Preparation method of heat insulation material and heat insulation material prepared by method
  • Preparation method of heat insulation material and heat insulation material prepared by method

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preparation example Construction

[0045] The present invention provides a method for preparing a heat insulating material in a first aspect. Specifically, refer to figure 1 , the preparation method comprises the steps of:

[0046] (1) Preparation of anti-scouring fiber matrix: superimpose and needle the first fiber cloth and the first fiber mesh tire to form the lower fiber preform; Fiber prefabricated body; continue to superimpose at least one layer of the third fiber cloth and the third fiber mesh tire and needle punching, spraying 5-15g / cm of surface reinforcement material comprising ceramic filler and phenolic binder during each layer of needle punching 2 , forming the upper fiber preform; using fibers to sew the lower fiber preform, the middle fiber preform and the upper fiber preform, and curing to obtain the anti-scouring fiber matrix; wherein, the ceramic filler and the phenolic binder The mass ratio is 100:(5-100); the ceramic filler includes glass powder, mica powder and talcum powder, and the mass...

Embodiment 1

[0088] S1. Preparation of scour-resistant fiber matrix

[0089] First prepare the lower fiber prefabricated body: use 0.1mm thick alumina fiber cloth + 1mm thick quartz fiber mesh tire, perform two-layer superimposed needle punching, and the needle punching density is 20 needles / cm 2 , control density range 0.4-0.5g / cm 3 , forming the lower fiber preform.

[0090] Then continue to tile the 20mm thick quartz fiber mesh tire on the upper surface of the lower fiber prefabricated body, fix it by needle punching, and the needle punching density is 8 needles / cm 2 , control the mesh tire density 0.15g / cm 3 , forming a medium fiber preform.

[0091] Finally, 0.1mm thick quartz fiber cloth + 1mm thick quartz fiber mesh tire is used to lay flat on the surface of the medium fiber prefabricated body, a total of 4 layers are laid, and glass powder + phenolic solution is sprayed on each layer when needling (glass powder: the quality of phenolic solution The ratio is 100:30), and each la...

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Abstract

The invention relates to a preparation method of a heat insulation material and the heat insulation material prepared by the method. The preparation method comprises the following steps: (1) preparation of a scouring-resistant fiber matrix: superposing first fiber cloth and a first fiber net tire and carrying out needling to form a lower fiber preform; keeping superposing a second fiber net tire and carrying out needling to form a middle fiber preform on the lower fiber preform; keeping superposing at least one layer of third fiber cloth and a third fiber net tire and carrying out needling, spraying 5-15 g / cm<2> of a surface reinforcing material containing a ceramic filler and a phenolic aldehyde binder during needling of the different layers to form an upper fiber preform; sewing the lower fiber preform, the middle fiber preform and the upper fiber preform by using fibers, and carrying out solidifying to obtain the scouring-resistant fiber matrix; (2) preparing an ablation composite material precursor; and (3) compounding. Due to existence of an aerogel material with an integral structure, the integral heat insulation performance of an ablation material is excellent, and due to existence of the ceramic filler, the surface of the ablation material has high erosion resistance.

Description

technical field [0001] The invention relates to the technical field of heat protection materials, in particular to a method for preparing a heat insulation material and a heat insulation material prepared by the method. Background technique [0002] When a space vehicle flies in the atmosphere, the outer surface of the vehicle is subjected to high heat flow and aerodynamic erosion, and the temperature is as high as 1000-10000°C. In order to ensure the safety of the main structure of the vehicle and the internal equipment, high-efficiency heat insulation materials must be used to prevent the external heat flow from being transmitted to the inside. [0003] Traditional ablation materials (including low-density ablation materials and high-density ablation materials) use phenolic resin, epoxy resin, silicone resin, polytetrafluoroethylene, etc. Composite with FRP honeycomb as filler or reinforcing material. During high heat flow aerodynamic scour, it can play a high-efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/79D06M15/41D06M17/04D06M17/00D04H1/4382D04H1/4209
CPCD04H1/4209D04H1/4382D06M11/79D06M15/41D06M17/00D06M17/04
Inventor 苏力军宋寒张丽娟李健裴雨辰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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