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A kind of ablation-resistant nanoporous resin-based composite material and preparation method thereof

A composite material and nanopore technology, which is applied in the field of ablation-resistant nanoporous resin-based composite materials and its preparation, can solve the problems of poor damage resistance, poor processability, high thermal conductivity and density, etc., and achieve high-temperature emissivity , The effect of improving ablation resistance

Active Publication Date: 2022-05-27
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional ablative heat-resistant materials cannot fully utilize the advantages of material ablation and heat absorption under the existing thermal environment conditions, and due to the high thermal conductivity and density of materials, the heat-resistant design of these materials will make the structure of the aircraft too bulky
Ceramic tile non-ablative materials have high brittleness and poor damage resistance. They need to be installed in blocks, with poor manufacturability and high manufacturing and maintenance costs.
However, the existing ablation and heat-resistant materials cannot give full play to the advantages of material ablation and heat absorption under the existing thermal environment conditions, and because the thermal conductivity and density of the materials are relatively large, the heat-proof design of these materials will make the aircraft structure is too bulky

Method used

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  • A kind of ablation-resistant nanoporous resin-based composite material and preparation method thereof
  • A kind of ablation-resistant nanoporous resin-based composite material and preparation method thereof
  • A kind of ablation-resistant nanoporous resin-based composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A preparation method of ablation-resistant nanoporous resin-based composite material, the method comprises the following steps:

[0048] (1) Configuration of resin solution: dissolve phenolic resin by polar solvent isopropanol and add curing agent hexamethylenetetramine of 14% of the quality of phenolic resin to obtain a resin solution with a concentration of 15ωt%;

[0049] (2) Low pressure impregnation: the density is 0.15g / cm 3 , the quartz fiber mat with the size of 150mm×150mm×10mm is placed in the mold, and the resin solution is completely impregnated with the quartz fiber mat, and the impregnation pressure is normal pressure;

[0050] (3) Sol-gel reaction: the mold is sealed, and the sol-gel reaction is carried out at 80°C, and the reaction is cooled to room temperature after 48 hours to obtain a composite material;

[0051] (4) Drying at atmospheric pressure: open the mold, and then place the composite material under normal temperature and pressure for 48 hours...

Embodiment 2

[0056] The difference from Example 1 is that in the step (6), the concentration of the ceramic organic precursor solution is 10ωt%, the viscosity is less than 300cps, the quality of the composite material is increased by about 2%, the ablation-resistant nanoporous resin-based composite material, phenolic resin, The mass ratio of quartz fiber and ceramic body is 36:64:2.

Embodiment 3

[0058] The difference from Example 1 is that in the step (6), the concentration of the ceramic organic precursor solution is 15ωt%, the viscosity is less than 300cps, and the quality of the composite material is increased by about 3%. The mass ratio of quartz fiber and ceramic body is 36:64:3.

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Abstract

The invention relates to an ablation-resistant nanoporous resin-based composite material and a preparation method thereof. Through surface impregnation, ceramic organic precursors are infiltrated into the nanopores of the nanoporous resin-based composite material to form dense ablation-resistant nanopores on the surface resin-based composites. Compared with the prior art, the ceramic organic precursor of the present invention undergoes micro-ceramization and vitrification reactions at high temperatures, forms an inorganic dense layer, improves the high-temperature emissivity of the surface layer, and improves the ablation resistance and anti-corrosion resistance of the surface layer. Air scour ability. At the same time, the appearance of the inorganic dense layer can isolate the diffusion of active oxygen components to the interior of the composite material, causing cracking and carbonization reactions to occur inside the material under high temperature and oxygen-poor conditions, producing a large amount of pyrolysis gas, and taking away a large amount of heat through the mass ejection effect. At the same time, the method of the invention has the advantages of short preparation process cycle, easy implementation and the like.

Description

technical field [0001] The invention relates to the field of low-density heat-proof composite materials, in particular to an ablation-resistant nanoporous resin-based composite material and a preparation method thereof. Background technique [0002] Heat-proof materials are an indispensable technical and material basis in aerospace engineering. With the development of modern penetration technology, the spacecraft maneuvers in the atmosphere for a long time at a high Mach number, the aerodynamic heating is more serious and lasting, and the temperature difference between the leeward and leeward sides is large. The aerothermal environment of this type of aircraft is characterized by high-low enthalpy alternation, medium and high heat flux density, and long-term aerobic environment heating. The working time is very long, and the circumferential temperature difference of the body is large. There are new special requirements for thermal protection materials. The thermal protectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/42C08J9/38C08L61/06C08K7/10
CPCC08J9/42C08J9/38C08J2361/06C08K7/10
Inventor 龙东辉罗艺张亚运曹俊翔吴克德
Owner EAST CHINA UNIV OF SCI & TECH
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