Aramid honeycomb-reinforced silicon-based heat insulating material and preparation method thereof

A kind of technology of aramid honeycomb and thermal insulation material, applied in the direction of coating, can solve the problem of low strength, and achieve the effect of improving reliability, improving structural stability and excellent ablation performance

Active Publication Date: 2018-06-15
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiency of low body strength of silicon-based thermal insulation materials, and propose a silicon-based thermal insulation material reinforced with aramid fiber honeycomb and its preparation method

Method used

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  • Aramid honeycomb-reinforced silicon-based heat insulating material and preparation method thereof
  • Aramid honeycomb-reinforced silicon-based heat insulating material and preparation method thereof
  • Aramid honeycomb-reinforced silicon-based heat insulating material and preparation method thereof

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preparation example Construction

[0048] A method for preparing an aramid honeycomb reinforced silicon-based heat insulating material, the steps of the method comprising:

[0049] (1) Mix vinyl-terminated silicone oil, hydrogen-containing silicone oil and inhibitor, and stir evenly;

[0050] (2) Add white carbon black, silicon carbide and magnesium oxide to the mixture obtained in step (1), and stir evenly;

[0051] (3) catalyst is added in the system that step (2) obtains, and stir;

[0052] (4) adding chopped carbon fiber to the system obtained in step (3), and stirring evenly to obtain a rubber compound;

[0053] (5) Fill the rubber compound obtained in step (4) into the honeycomb holes of the aramid honeycomb, and cure under pressure at room temperature to obtain the aramid honeycomb-reinforced silicon-based heat insulating material.

[0054] In the described step (5), when the fluidity of the obtained sizing material is better, the sizing material is filled into the honeycomb holes of the aramid honeyco...

Embodiment

[0061] The use of aramid honeycomb reinforced silicon-based insulation material can improve the structural stability of the insulation material during the ablation process, and because the axial direction of the aramid honeycomb hole is perpendicular to the direction of the engine gas flow, it is beneficial to improve the resistance of the insulation material in the honeycomb hole. The ability to scour, thereby improving the ablation performance of the insulation material, thereby improving the thermal protection reliability of the insulation layer in the engine.

[0062] A silicon-based thermal insulation material reinforced with aramid fiber honeycomb, comprising aramid fiber honeycomb and rubber material, the rubber material is filled in the honeycomb holes of the aramid fiber honeycomb. Among them, calculated in parts by weight, weigh each component material in the rubber material according to the composition ratio, and press 1) terminal vinyl silicone oil, hydrogen-contain...

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Abstract

The invention relates to an aramid honeycomb-reinforced silicon-based heat insulating material and a preparation method thereof and belongs to the field of thermal insulation in a missile engine. Through use of an aramid honeycomb with skeleton reinforcing effects, the structural stability of the silicon-based heat insulating material is improved, excellent ablation resistance is obtained and thearamid honeycomb-reinforced silicon-based heat insulating material can be used in the field of thermal insulation in a missile engine. The glue in pores of the aramid honeycomb is a room temperature vulcanized silicone rubber composite material. The aramid honeycomb-reinforced silicon-based heat insulating material in the field of thermal insulation in a missile engine satisfies the requirements on heat insulating in the missile engine. Through use of the aramid honeycomb in the silicon-based heat insulating material, the aramid honeycomb-reinforced silicon-based heat insulating material is obtained.

Description

technical field [0001] The invention relates to an aramid fiber honeycomb-reinforced silicon-based thermal insulation material and a preparation method thereof, belonging to the field of internal thermal insulation of missile engines. Background technique [0002] In order to improve the strike capability of weapons and increase the range of missiles, the working hours of missile engines will continue to increase, which puts forward higher requirements for heat insulation materials to ensure that the structure of the engine shell is not damaged. [0003] At present, silicon-based thermal insulation materials are one of the first choices among high-ablation-resistant thermal insulation materials in the field of missile engine internal thermal insulation. Silicon-based thermal insulation materials have excellent ablation resistance and heat resistance, but their low body strength makes it difficult to resist the erosion of high-speed gas flow. Therefore, there is a need to in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/36C08J9/42C08J9/00C08L83/07C08L83/05C08K13/04C08K7/06C08K3/36C08K3/34C08K3/22C08L77/10
CPCC08J9/0061C08J9/0066C08J9/36C08J9/365C08J9/42C08J2377/10C08J2483/05C08J2483/07C08K3/34C08K3/36C08K7/06C08K13/04C08K2003/222
Inventor 李洋孙笑然方陆军王江詹穹彭正贵
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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