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Silicone rubber based ablation-resisting heat insulation composite material and preparation method thereof

A composite material and silicone rubber technology, which is applied in the field of silicone rubber-based ablation-resistant thermal insulation composite materials and their preparation, can solve the problems of difficult formation of carbonized layer, low strength, and low carbon residue rate, and achieve enhanced ablation resistance and Oxidation resistance, strength and density improvement effects

Inactive Publication Date: 2015-05-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon residue rate of silicone rubber is lower than that of EPDM rubber, and its strength is low, so it is difficult to form a dense carbonized layer.

Method used

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  • Silicone rubber based ablation-resisting heat insulation composite material and preparation method thereof
  • Silicone rubber based ablation-resisting heat insulation composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The silicone rubber-based ablation-resistant and heat-insulating composite material of this embodiment is composed of 100 parts by mass of silicone rubber methyl vinyl silicone rubber, 5 parts by mass of ablation-resistant fiber 6mm chopped carbon fiber, 30 parts by mass of fumed silica, 2 mass parts of structure control agent hydroxyl silicone oil, 15 mass parts of ceramized powder magnesium oxide and 15 mass parts of zirconia, 5 mass parts of carbide carbon nanotubes and 5 mass parts of acetylene carbon black, 10 mass parts of coupling agent KH-560 and The vulcanizing agent dicumyl peroxide is composed of 0.5 parts by mass, the tensile strength of its molded product is 6.78 MPa, the elongation at break is 424%, and the line ablation rate is 0.055mm / s. Its macroscopic picture after ablation test for figure 1 , SEM picture as figure 2 shown, from figure 1 with figure 2 It can be seen that the silicone rubber-based ablation-resistant thermal insulation composite mat...

Embodiment 2

[0044] The silicone rubber-based ablation-resistant and heat-insulating composite material of this embodiment is composed of 50 parts by mass of silicone rubber methyl vinyl silicone rubber, 50 parts by mass of methylphenyl vinyl silicone rubber, and 6 mm chopped aramid fiber of ablation resistance. 15 parts by mass of fiber, 10 parts by mass of precipitated white carbon black, 0.5 parts by mass of structural control agent hydroxy silicone oil, 10 parts by mass of ceramic powdered alumina and 40 parts by mass of calcium oxide, 15 parts by mass of carbonized nano-graphite powder and 15 parts by mass of graphene Parts by mass, 20 parts by mass of coupling agent KH-570 and 2 parts by mass of vulcanizing agent Shuangwuwu, the tensile strength of the molded product is 6.57MPa, the elongation at break is 487%, and the linear ablation rate is 0.041mm / s .

[0045] Its preparation method, carry out according to the following steps:

[0046] (1) According to silicone rubber: 50 parts by ...

Embodiment 3

[0052] The silicone rubber-based ablation-resistant and heat-insulating composite material of this embodiment is composed of 100 parts by mass of silicone rubber methyl phenyl vinyl silicone rubber, 5 parts by mass of ablation-resistant fiber 6mm chopped carbon fiber and 25 parts by mass of polysulfone fiber , 30 parts by mass of fumed silica and 50 parts by mass of precipitated silica, 10 parts by mass of phenyl silicone oil as a structural control agent, 5 parts by mass of ceramic powdered titanium oxide, 1 part by mass of carbonized acetylene carbon black, and a coupling agent Composed of 1 mass part of KH-550, 1 mass part of hexamethyldisilazane and 15 mass parts of vulcanizing agent benzoyl peroxide, the tensile strength of the molded product is 7.57MPa, the elongation at break is 387%, and the wire firing The corrosion rate is 0.027mm / s.

[0053] Its preparation method, carry out according to the following steps:

[0054] (1) According to 100 parts by mass of silicone r...

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Abstract

The invention belongs to the technical field of thermal protection special composite materials, and in particular relates to a silicone rubber based ablation-resisting heat insulation composite material and a preparation method thereof. The silicone rubber based ablation-resisting heat insulation composite material comprises the following components in parts by mass: 100 parts of silicone rubber, 5-30 parts of ablation-resisting fiber, 10-80 parts of white carbon black, 0.5-10 parts of a structural control agent, 5-50 parts of ceramization powder, 1-30 parts of carbide, 2-20 parts of a coupling agent and 0.5-15 parts of a vulcanizing agent. The preparation method comprises the following steps: firstly, preparing materials according to the above components, mixing on a double-roller opening mixing machine to form pieces, and further performing vulcanization, thereby obtaining the silicone rubber based ablation-resisting heat insulation composite material. The strength and the density of a carbonized layer of the silicone rubber based ablation-resisting heat insulation composite material are improved, the ablation resistance and the oxidation resistance of the silicone rubber based ablation-resisting heat insulation composite material are improved, and the requirement that the rapider the speed of a spacecraft is, the higher the effective load is in the future can be met.

Description

technical field [0001] The invention belongs to the technical field of special composite materials for heat protection, and in particular relates to a silicone rubber-based ablation-resistant and heat-insulating composite material and a preparation method thereof. Background technique [0002] The thermal protection system is one of the key technologies to ensure the safe, fast and economical flight of the space vehicle. The thermal protection of the spacecraft includes two aspects: the external thermal protection of the surface and the internal thermal protection of the engine. The inner heat insulation layer of the solid rocket motor is an elastic heat-resistant material that protects the combustion chamber shell. It is a heat-insulating protective material placed between the inner surface of the shell and the propellant. Most of the heat is taken to ease the transmission speed of the high-temperature gas temperature to the shell, prevent the shell from reaching a tempera...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/06C08L83/04C08L77/10C08L81/06C08K13/06C08K9/06C08K3/36C08K3/22C08K7/06C08K7/24C08K3/04B29C35/02
Inventor 李勇薛向欣何金桂
Owner NORTHEASTERN UNIV
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