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Nanoporous antioxidant resin-based composite material and preparation method thereof

A composite material and anti-oxidation technology, applied in the field of composite materials, can solve the problems of inability to meet the requirements of long-term hypersonic flight, poor anti-oxidation performance, and high thermal conductivity, and achieve excellent micro-ablation/thermal insulation performance. The effect of good ablation and simple preparation process

Active Publication Date: 2020-04-21
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional resin-based heat-resistant materials have high thermal conductivity (>0.4W / m·K) and high density (~1.4g / cm 3 ) and poor oxidation resistance and other factors, it cannot meet the requirements of hypersonic long-duration flight

Method used

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  • Nanoporous antioxidant resin-based composite material and preparation method thereof
  • Nanoporous antioxidant resin-based composite material and preparation method thereof
  • Nanoporous antioxidant resin-based composite material and preparation method thereof

Examples

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Embodiment 1

[0049] A nanoporous anti-oxidation resin-based composite material and a preparation method thereof, comprising the following steps:

[0050] Add ethanol, melamine, formaldehyde and sodium hydroxide to react in the reactor, the mol ratio of melamine and formaldehyde is 0.16:1, the mol ratio of sodium hydroxide and formaldehyde is 1:100, obtains the methylol melamine resin oligomer; Then add phenol and boric acid, the molar ratio of phenol and formaldehyde is 0.42:1, the mass ratio of boric acid and formaldehyde is 0.5:6, adjust the pH=7, continue the reaction for 1h, the obtained solution is heated at 50°C, -0.09MPa Distilled under reduced pressure to obtain antioxidant resin.

[0051] Then weigh a certain amount of the anti-oxidation resin and isopropanol respectively, add them into the stirring tank, stir mechanically until they are completely dissolved, finally add hexamethylenetetramine, and continue stirring for 1 hour to obtain the anti-oxidation resin solution, wherein t...

Embodiment 2

[0055] A nanoporous anti-oxidation resin-based composite material and a preparation method thereof, comprising the following steps:

[0056] Add ethanol, melamine, formaldehyde and sodium hydroxide to react in the reactor, the mol ratio of melamine and formaldehyde is 0.2:1, the mol ratio of sodium hydroxide and formaldehyde is 1:50, obtains the methylol melamine resin oligomer; Then add phenol and boric acid, the molar ratio of phenol and formaldehyde is 0.4:1, the mass ratio of boric acid and formaldehyde is 0.5:6, adjust the pH=7, continue the reaction for 1h, the obtained solution is heated at 55°C, -0.08MPa Distilled under reduced pressure to obtain antioxidant resin.

[0057] Then weigh a certain amount of the anti-oxidation resin and isopropanol respectively, add them into the stirring tank, stir mechanically until they are completely dissolved, finally add hexamethylenetetramine, and continue stirring for 1 hour to obtain the anti-oxidation resin solution, wherein the ...

Embodiment 3

[0061] A nanoporous anti-oxidation resin-based composite material and a preparation method thereof, comprising the following steps:

[0062] Add methanol, urea, formaldehyde and potassium hydroxide to the reactor for reaction, the molar ratio of urea to formaldehyde is 0.16:1, and the molar ratio of potassium hydroxide to formaldehyde is 1:40 to obtain a reaction solution; then add resorcinol And white carbon black, the molar ratio of phenol and formaldehyde is 0.52:1, the mass ratio of white carbon black and formaldehyde is 0.5:6, adjust the pH=7, continue the reaction for 1h, put the obtained solution at 50°C, -0.09MPa Distill under reduced pressure to obtain antioxidant resin.

[0063] Then weigh a certain amount of the anti-oxidation resin and isopropanol respectively, add them into the stirring tank, stir mechanically until they are completely dissolved, finally add hexamethylenetetramine, and continue stirring for 1 hour to obtain the anti-oxidation resin solution, where...

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Abstract

The invention relates to a nanoporous antioxidant resin-based composite material and a preparation method thereof. The composite material comprises the following components by mass: 20-80 wt% of antioxidant resin and 20-80 wt% of a reinforcer. The preparation method comprises the steps: (1) preparation of an antioxidant resin solution; (2) low-pressure RTM impregnation; (3) a sol-gel reaction; and(4) drying to finally obtain the composite material. Compared with the prior art, the composite material prepared by the invention has the advantages of light weight, high strength, excellent heat insulation property, ablation resistance, adjustable nanoparticle network structure and the like; through the synergistic effect of physical and chemical antioxidants, the oxidation resistance of a prepared matrix resin is greatly improved compared with the oxidation resistance of traditional resin, and the matrix resin has the advantages of good oxidation resistance in an environment with a temperature of 600-2000 DEG C and the like and can be widely applied to an external heat protection system of a hypersonic aircraft in an aerobic atmosphere.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a nanoporous anti-oxidation resin-based composite material and a preparation method thereof. Background technique [0002] With high maneuverability and long-distance precision strike as the main technical features, hypersonic vehicles are the commanding heights of the aerospace and aviation of all major military powers. The hypersonic vehicle flies in the near-Earth space at a high Mach number speed for a long time, and its fuselage will have severe friction and impact with the air, and the surface will generate a high temperature of 600-2000 ° C. This puts forward extremely strict requirements for the use of thermal protection systems, which require comprehensive properties such as excellent high-temperature toughness, long-term anti-oxidation, anti-ablation, and light weight. Therefore, the problem of hypersonic large-area thermal protection is the most prominent technical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08K7/10C08J9/28C08G8/28
CPCC08J9/28C08G8/28C08J2361/14C08K7/10C08J2205/042
Inventor 龙东辉曹俊翔吴克德张琪凯张亚运曹宇
Owner EAST CHINA UNIV OF SCI & TECH
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