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Anti-scouring aerogel composite material and preparation method thereof

A composite material and aerogel technology, which is applied in chemical instruments and methods, lamination devices, lamination auxiliary operations, etc., can solve the problems of difficult control of profile accuracy, increase the complexity of the process, and increase the cost, and achieves a reduction in Punching and sewing process, reducing the risk of delamination, low cost effect

Active Publication Date: 2018-12-18
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sandwich structure material involves three-layer lamination, sewing and other processes, which not only increases the complexity of the process, but also increases the cost, and there is a risk of easy delamination. In addition, because the surface cannot be machined, it is difficult to control the surface accuracy

Method used

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  • Anti-scouring aerogel composite material and preparation method thereof
  • Anti-scouring aerogel composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1) The selected density is 0.70g / cm 3 , the mullite fiber felt with a thickness of 1mm is a high-density fiber felt, and the selected density is 0.10g / cm 3 , The quartz fiber felt with a thickness of 24mm is a low-density fiber felt.

[0052] 2) Firstly, methyltrimethoxysilane is used to hydrophobically treat the quartz fiber mat, and then the quartz fiber mat and mullite fiber mat are prepared into a high-temperature-resistant fiber preform with an integral density gradient by needle punching. The needle punching density is 15 stitches / cm 2 .

[0053] 3) Place the prefabricated body in a closed container, impregnate the composite mullite fiber mat with the silica sol by vacuum impregnation, repeat the impregnation 9 times, and then perform high temperature treatment to remove organic matter.

[0054] 4) The surface-strengthened prefabricated body is impregnated with silica sol, and after aging, supercritical drying and other processes, an airgel thermal insulation c...

Embodiment 2

[0058] 1) The selected density is 0.70g / cm 3 , the mullite fiber felt with a thickness of 1mm is a high-density fiber felt, and the selected density is 0.10g / cm 3 , The quartz fiber felt with a thickness of 24mm is a low-density fiber felt.

[0059] 2) First, use methylphenyl silicone resin solution to hydrophobically treat the quartz fiber mat, and then prepare the quartz fiber mat and mullite fiber mat by needling to form an integral high-temperature-resistant fiber preform with a density gradient. 15 stitches / cm 2 .

[0060] 3) Place the prefabricated body in a closed container, impregnate the composite mullite fiber mat with the silica sol by vacuum impregnation, repeat the impregnation 9 times, and then perform high temperature treatment to remove organic matter.

[0061] 4) The surface-strengthened prefabricated body is impregnated with silica sol, and after aging, supercritical drying and other processes, an airgel thermal insulation composite material with a density...

Embodiment 3

[0065] 1) The selected density is 0.70g / cm 3 , the silicon carbide fiber felt with a thickness of 1mm is a high-density fiber felt, and the selected density is 0.10g / cm 3 , The mullite fiber felt with a thickness of 24mm is a low-density fiber felt.

[0066] 2) First, use methyltrimethoxysilane to hydrophobically treat the mullite fiber mat, and then prepare the mullite fiber mat and the silicon carbide fiber mat by needling to form an integral high-temperature-resistant fiber preform with a density gradient. Puncture density is 15 needles / cm 2 .

[0067] 3) Place the prefabricated body in a closed container, impregnate the composite mullite fiber mat with the mullite sol by vacuum impregnation, repeat the impregnation 9 times, and then perform high temperature treatment to remove organic matter.

[0068] 4) The surface-strengthened prefabricated body is impregnated with mullite sol, and after aging, supercritical drying and other processes, an airgel thermal insulation com...

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Abstract

The invention relates to a method for preparing an anti-scouring aerogel composite material. The method comprises: (1) connecting a hydrophobic first reinforcement to a hydrophilic second reinforcement to obtain a preform, (2) dipping the preform part at least comprising the second reinforcement in a hydrophilic first impregnating material subjected to densification treatment and drying the preform to obtain a composite material, and (3) carrying out hydrophilic treatment on the preform part at least comprising the hydrophobic first reinforcement to obtain the anti-scouring aerogel composite material. The invention also relates to the anti-scouring aerogel composite material obtained by the method. The anti-scouring aerogel composite material is suitable for profile machining so that a member with a desired profile is obtained, or the whole outer profile is subjected to machining after aircraft assembling so that the aerodynamic shape of the aircraft is accurately ensured.

Description

technical field [0001] The invention relates to a preparation method of an anti-scouring airgel composite material, and also relates to an anti-scouring airgel composite material prepared by the preparation method. Background technique [0002] The aerodynamic friction between the surface of the thermal protection system of the hypersonic aircraft and the air on the way to and from the atmosphere or the sky produces high temperature and aerodynamic pressure. Currently, the thermal protection materials that can withstand are rigid heat insulation tiles and ablation materials. [0003] Ablation material is a heat protection method widely used in re-entry vehicles at present. It mainly uses the heat absorption of ablation material cracking and gas diffusion to take away heat to achieve the purpose of heat protection, but it has high density, poor heat insulation performance and linear ablation. Very obvious shortcomings. [0004] Rigid ceramic tiles are the main solution for l...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B37/00B32B38/16
CPCB32B5/18B32B9/005B32B9/046B32B37/00B32B38/164B32B2266/126
Inventor 苏力军裴雨辰李文静张丽鹃宋寒杨洁颖
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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