Light reusable thermal insulation material and preparation method thereof

A technology of thermal insulation materials and composite materials, which is applied in the field of lightweight and reusable thermal insulation materials and their preparation, can solve the problems of low bearing capacity, inability to further prevent heat flow transfer, and large thermal conductivity, so as to adapt to the external environment. Strong ability of heating change, excellent ablation and heat insulation function, strong shape and heat insulation effect

Active Publication Date: 2020-06-16
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of ablation of this type of material is too large in the working environment, and the thermal conductivity after ablation is large, which cannot further prevent heat flow transfer, so that the long-term ablation/heat insulation performance of the material cannot be exerted; and due to glass fiber, carbon fiber, basalt Cotton, glass microspheres and other reinforcing materials or fillers are prone to fall off and peel off after ablation, and it is difficult for such materials to maintain the aerodynamic shape of ablation/insulation materials
In addition, the current traditional ablati

Method used

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  • Light reusable thermal insulation material and preparation method thereof
  • Light reusable thermal insulation material and preparation method thereof
  • Light reusable thermal insulation material and preparation method thereof

Examples

Experimental program
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Effect test

Example Embodiment

[0040] The present invention provides, in a second aspect, the preparation method of the thermal insulation material described in the first aspect of the present invention, the method comprising the following steps:

[0041] (1) combining the upper fiber preform layer, the middle fiber matrix layer and the lower fiber preform layer (for example, by bonding, stitching or winding, etc.) to obtain an anti-scour preform;

[0042] (2) Compound the anti-scour preform obtained in step (1) with a ceramic matrix to obtain an anti-scour matrix material; for example, the ceramic matrix can be formulated into a hydrosol (ceramic matrix precursor) and then mixed with the anti-scour matrix The preform is impregnated and compounded, so as to realize the densification of the upper and lower fiber preform layers to obtain the anti-scour matrix material; the densification degree of the upper and lower fiber preform layers can also be effectively adjusted, for example, according to the number of ...

Example Embodiment

[0051] Example 1

[0052] ①Preparation of anti-scour preform: choose mullite fiber as the intermediate fiber matrix layer, with a bulk density of 100kg / m 3 , thickness 25mm, size 150×150mm, using methyltrimethoxysilane as the hydrophobicizing agent, the intermediate fiber matrix layer is hydrophobized by gas-phase hydrophobicity; The aluminum fiber diameter is 10 μm, the braiding thickness is 2 mm, and the volume fraction is 40%. The lower fiber preform layer with quartz fiber braiding 2.5D, the quartz fiber diameter is 8 mm, the braiding thickness is 0.5 mm, and the volume fraction is 40%; the upper fiber preform with a thickness of 2 mm is used. Layer / intermediate fiber matrix layer / 0.5mm lower fiber preform layer is laminated and stitched together, and alumina fiber is selected as the suture material. The diameter of a single alumina fiber is 8mm, the linear density is 800tex, and the stitching pitch is It is 10*10mm, and the anti-scour preform is obtained.

[0053] ②Prep...

Example Embodiment

[0059] Example 12

[0060] Embodiment 12 is basically the same as Embodiment 1, except that:

[0061] In ②, the anti-scour matrix material with the mass ratio of ceramic matrix to anti-scour preform of 40:100 was obtained.

[0062] Using the same test method as Example 1, the performance test of the thermal insulation material prepared in this example is carried out, and the performance test results are shown in Table 2.

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Abstract

The invention relates to a light reusable thermal insulation material and a preparation method thereof. The thermal insulation material comprises an anti-scouring matrix material and an ablative composite material which is compounded with the anti-scouring matrix material and comprises an ablative resin, a gel curing agent and an ablative filler, wherein the anti-scouring matrix material comprisesan anti-scouring prefabricated body and a ceramic base body compounded with the anti-scouring prefabricated body, and the anti-scouring prefabricated body comprises an upper fiber prefabricated bodylayer, a lower fiber prefabricated body layer and a middle fiber base body layer. The method comprises the following steps: combining an upper fiber prefabricated body layer, a lower fiber prefabricated body layer and a middle fiber matrix layer to prepare an anti-scouring prefabricated body, and then compounding the anti-scouring prefabricated body with a ceramic matrix to prepare an anti-scouring matrix material; impregnating the anti-scouring matrix material with an ablative composite material mixed solution; and sequentially carrying out gelatinization and solidification on the anti-scouring matrix material to obtain the thermal insulation material. The thermal insulation material has the advantages of being excellent in ablation thermal insulation performance, high in shape maintaining capacity and capable of being repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of heat-proof material preparation, and in particular relates to a lightweight and reusable heat-proof material and a preparation method thereof. Background technique [0002] When the re-entry spacecraft flies in the atmosphere, the outer surface of the vehicle is subjected to high airflow erosion, and the temperature is as high as 2000-10000°C. The high-efficiency ablation heat absorption / heat insulation integrated system must be used to protect the vehicle from heat. [0003] Traditional ablation materials (including low density and high density) use phenolic resin, epoxy resin, silicone resin, polytetrafluoroethylene, etc. Compounded with agents or reinforcing materials. Under high aerodynamic heat flow, heat is absorbed through surface ablation, so as to maintain the lower surface material below a certain temperature and ensure the structural stability of the lower surface material. However, the amoun...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/82C04B35/14C04B35/10C04B35/48C04B35/185C04B35/565C04B35/563C04B35/583C04B35/01C04B41/84
CPCC04B35/82C04B35/14C04B35/10C04B35/48C04B35/185C04B35/565C04B35/563C04B35/583C04B35/01C04B41/84C04B41/4961C04B2235/5232C04B2235/5228C04B2235/5224C04B2235/5256C04B2235/5244C04B2235/3418C04B2235/3409C04B2235/3821C04B2235/386C04B2235/616C04B2235/77C04B2235/96C04B2235/9607C04B2235/9615C04B41/4811C04B41/46C04B41/4535C04B41/4515C04B41/0072
Inventor 苏力军张丽娟郭建业宋寒鲁胜李文静裴雨辰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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