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High-strength nanoporous ceramizable ablation heatproof composite material and preparation method thereof

A composite material and nanoporous technology, applied in the field of high-strength nanoporous ceramic ablative heat-resistant composite materials and their preparation, can solve problems such as affecting the mechanical properties between layers of materials, achieve excellent anti-oxidation performance, prevent oxidation , Improve the effect of compressive and thermal insulation

Active Publication Date: 2020-04-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of hollow microspheres will affect the interlayer mechanical properties of the material.

Method used

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  • High-strength nanoporous ceramizable ablation heatproof composite material and preparation method thereof
  • High-strength nanoporous ceramizable ablation heatproof composite material and preparation method thereof
  • High-strength nanoporous ceramizable ablation heatproof composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Add methyltrimethoxysilane to the reactor, and then add catalyst concentrated hydrochloric acid; the molar amount of HCl in the concentrated hydrochloric acid is 4-6% of methyltrimethoxysilane, and heat to 70-85°C for monomer polymerization reaction, The reaction time is 36 hours, condensed and refluxed to obtain polymer silicone; add phenol, formaldehyde and hydrochloric acid into the reaction kettle, the molar ratio of phenol and formaldehyde is 7:10, the molar ratio of HCl and phenol in hydrochloric acid is 1:20, in After reacting at 70°C for 1 hour, the phenolic resin was obtained, and then the high-molecular organosilicon prepared just now was added, and the temperature was raised to 90°C, and after reflux heating for 3 hours, the pH was adjusted to about 7 to obtain the organosilicon hybrid phenolic resin, and then Dissolve in isopropanol and add curing agent hexamethylenetetramine. Wherein, the mass ratio of polymer silicone, phenolic resin, isopropanol and curin...

Embodiment 2

[0065] Add methyltrimethoxysilane to the reactor, and then add catalyst concentrated hydrochloric acid; the molar amount of HCl in concentrated hydrochloric acid is 4-6% of methyltrimethoxysilane, and heat to 70-85°C to carry out monomer polymerization reaction, The reaction time is 36 hours, condensed and refluxed to obtain polymer silicone; add phenol, formaldehyde and hydrochloric acid into the reaction kettle, the molar ratio of phenol and formaldehyde is 7:10, the molar ratio of HCl and phenol in hydrochloric acid is 1:20, in After reacting at 70°C for 1 hour, the phenolic resin was obtained, and then the high molecular weight organosilicon prepared just now was added, and the temperature was raised to 90°C, and after reflux heating for 3 hours, the pH was adjusted to about 7 to obtain the organosilicon hybrid phenolic resin, and then Dissolve in isopropanol and add curing agent hexamethylenetetramine. Wherein, the mass ratio of polymer silicone, phenolic resin, isopropan...

Embodiment 3

[0069] Add methyltrimethoxysilane to the reactor, and then add catalyst concentrated hydrochloric acid; the molar amount of HCl in the concentrated hydrochloric acid is 4-6% of methyltrimethoxysilane, and heat to 70-85°C for monomer polymerization reaction, The reaction time is 36 hours, condensed and refluxed to obtain polymer silicone; add phenol, formaldehyde and hydrochloric acid into the reaction kettle, the molar ratio of phenol and formaldehyde is 7:10, the molar ratio of HCl and phenol in hydrochloric acid is 1:20, in After reacting at 70°C for 1 hour, the phenolic resin was obtained, and then the high-molecular organosilicon prepared just now was added, and the temperature was raised to 90°C, and after reflux heating for 3 hours, the pH was adjusted to about 7 to obtain the organosilicon hybrid phenolic resin, and then Dissolve in isopropanol and add curing agent hexamethylenetetramine. Wherein, the mass ratio of polymer silicone, phenolic resin, isopropanol and curin...

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Abstract

The invention relates to a high-strength nanoporous ceramizable ablation heatproof composite material and a preparation method thereof. The composite material comprises 20-60 wt% of hybrid resin and 40-80 wt% of a fiber reinforcement, the hybrid resin comprises silicone hybrid phenolic resin, the thickness of the composite material is 2-50 mm, the density of the composite material is 700-1400 kg / m<3>, and the nanopore diameter is 50-1000 nm. The preparation method comprises the following steps: (1) preparing a hybrid resin sol; (2) impregnating the sol; (3) carrying out a sol-gel reaction; and(4) drying the composite material to obtain the composite material. Compared with like materials in the prior art, the composite material of the invention has the advantages of large binding force ofthe resin and fiber interface, high compression modulus, high bending strength, high tensile strength, ceramization at a high temperature, low thermal conductivity and the like.

Description

technical field [0001] The invention relates to the field of heat-resistant materials, in particular to a high-strength nanoporous ceramic-ablative heat-resistant composite material and a preparation method thereof. Background technique [0002] With the continuous development of modern world-wide aerospace vehicle penetration technology, the long-term maneuvering flight of aerospace vehicles with high Mach number in and out of the atmosphere has become a research hotspot in various countries. However, in this environment, factors such as the constant change of the airflow and the flight status of the aircraft may change at any time make the aerodynamic heating not limited to the steady-state form. The most effective way to protect against this uncontrollable form of intense heating is the use of ablative materials. At present, the traditional ablation heat-proof materials cannot give full play to the advantages of heat absorption and cooling, and because of defects such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08K7/06C08K7/10C08K7/14C08J9/00C08J5/24C08G8/28C08G77/42
CPCC08J9/0085C08J5/24C08G8/28C08G77/42C08J2361/14C08K7/06C08K7/10C08K7/14
Inventor 龙东辉钱震张亚运罗艺曹宇
Owner EAST CHINA UNIV OF SCI & TECH
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