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Carbon foam in-situ reinforced carbon aerogel high-temperature thermal insulation material and preparation method thereof

The technology of carbon aerogel and thermal insulation material is applied in the field of high temperature thermal insulation material, which can solve the problems such as the decline of thermal insulation performance and mechanical performance, and achieve the effects of easy regulation of pore structure, good thermal insulation performance and high strength

Active Publication Date: 2013-04-17
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent US 8105512 B1 discloses a method of using carbon foam to strengthen carbon airgel, but during the drying and carbonization of carbon airgel, due to the shrinkage of carbon airgel, the carbon airgel and carbon foam pore walls There are a lot of pores between them, and these pores need to be filled with phenolic resin to reduce the thermal insulation performance and mechanical properties of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Add 20g of formic acid to 400mL of furfuryl alcohol, stir evenly to obtain a furfuryl alcohol solution, then immerse the reticular open-cell polyurethane foam with a pore size of 20PPI and a size of 100×100×10mm in the furfuryl alcohol solution for 1 hour to obtain furfuryl alcohol coated on the surface Reticulated open-cell polyurethane foam;

[0023] 2) Heat-treat the polyurethane foam obtained in step 1) in an oven at 80°C for 2 hours to polymerize furfuryl alcohol to obtain a surface-modified reticular open-cell polyurethane foam;

[0024] 3) Dissolve 154g of resorcinol (R) and 236g of formaldehyde (F) in 1200mL of deionized water (W), add 0.9g of sodium carbonate (C) as a catalyst, and stir well to obtain RF organosol. 4) Immerse the polyurethane foam obtained in step 2) into the RF organosol obtained in step 3) for 2 hours, transfer it to an oven, and mature it at 40°C for 12 hours to obtain a modified network-shaped open-cell polyurethane foam reinforced RF o...

Embodiment 2

[0030] 1) Add 25g of formic acid to 400mL of furfuryl alcohol, stir evenly, soak the reticular open-cell polyurethane foam with a pore size of 20PPI and a size of 100×100×10mm in the furfuryl alcohol solution for 0.5h to obtain a reticular open-cell foam coated with furfuryl alcohol. Cellular polyurethane foam.

[0031] 2) The reticular open-cell polyurethane foam coated with furfuryl alcohol was heat-treated in an oven at 80°C for 2 hours to polymerize furfuryl alcohol to obtain a surface-modified reticular open-cell polyurethane foam.

[0032] 3) Dissolve 154g of resorcinol (R) and 236g of formaldehyde (F) in 2500mL of deionized water (W), add 0.15g of sodium carbonate (C) as a catalyst, and stir for 0.0 to obtain RF organosol. 4) After immersing the modified reticular open-cell polyurethane foam in RF organosol for 2 hours, transfer it to an oven and cure it at 40°C for 12 hours to obtain the modified reticular open-cell polyurethane foam reinforced RF organogel.

[0033] ...

Embodiment 3

[0038] 1) Immerse the reticular open-cell polyurethane foam with a pore size of 120PPI and a size of 200×200×40mm in the phenolic resin solution for 4 hours to obtain a reticular open-cell polyurethane foam coated with phenolic resin on the surface.

[0039]2) The reticular open-cell polyurethane foam coated with phenolic resin was heat-treated in an oven at 60°C for 4 hours to polymerize the phenolic resin to obtain a surface-modified reticular open-cell polyurethane foam.

[0040] 3) Dissolve 496g of resorcinol (R) and 716g of formaldehyde (F) in 2500mL of deionized water (W), add 7.95g of sodium carbonate (C) as a catalyst, and stir well to obtain RF organosol. 4) After immersing the modified reticular open-cell polyurethane foam in RF organosol for 4 hours, transfer it to an oven and cure it at 60°C for 24 hours to obtain the modified reticular open-cell polyurethane foam reinforced RF organogel.

[0041] 5) The modified network open-cell polyurethane foam reinforced RF or...

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Abstract

The invention relates to a carbon foam in-situ reinforced carbon aerogel high-temperature thermal insulation material and a preparation method thereof; the carbon foam in-situ reinforced carbon aerogel high-temperature thermal insulation material has the characteristics of high temperature resistance, low heat conductivity and high strength, and is applicable to thermal protection system of the hypersonic speed aircraft, belonging to the technical field of high-temperature thermal insulation material. The thermal insulation material takes carbon foam which is formed in an in-situ manner as a reinforcing skeleton and carbon aerogel as a substrate, and eliminates pores between the carbon foam skeleton and the carbon aerogel caused by the conventional reinforcing method through a common carbonization; the prepared carbon foam reinforced carbon aerogel has the characteristics of high temperature resistance, low heat conductivity and high strength, and is machinable; the room temperature heat conductivity can be reduced to 0.04W / m.k, and the maximum use temperature in an inert atmosphere can reach 3000 DEG C.

Description

technical field [0001] The invention relates to a carbon foam in-situ reinforced carbon airgel high-temperature heat insulation material and a preparation method thereof. The carbon foam reinforced carbon airgel high-temperature heat insulation material in the invention has the characteristics of high temperature resistance, low thermal conductivity and high strength, can be used in the thermal protection system of hypersonic aircraft, and belongs to the technical field of high temperature heat insulation materials. Background technique [0002] Aerogels are a class of porous thermal insulation materials that have received extensive attention in recent years. The solid-phase skeleton of the airgel is cross-linked by nanoparticles, the pore size is between a few nanometers and tens of nanometers, and it has a high specific surface area. The most common airgel is SiO 2 、Al 2 o 3 and carbon aerogels. Due to the unique nanostructure of airgel, its thermal conduction paths ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/84C04B35/52C04B35/622
Inventor 李俊宁胡子君孙陈诚王晓婷宋兆旭
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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