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Moisture-proof modified phenolic heat insulating material and preparation method thereof

A thermal insulation material and phenolic technology, which is applied in the field of moisture-proof modified phenolic thermal insulation materials and preparation, can solve problems such as affecting the use and storage life, and achieve stable and controllable weight gain, wide and cheap raw material sources, and good process compatibility. Effect

Active Publication Date: 2022-07-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the known reports related to the waterproof modification of phenolic materials, the hydrophobic treatment of the material is mainly achieved by compounding a hydrophobic coating on the outer surface of the material. This treatment can prevent liquid water from interacting with the The contact of phenolic insulation materials prevents the material from absorbing liquid water, but it cannot fundamentally solve the problem that the residual phenolic hydroxyl groups on the surface of the internal pores of the material absorb and enrich gaseous water, so it affects the above-mentioned high-performance insulation materials in large and highly integrated The use and storage life of the thermal protection system

Method used

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  • Moisture-proof modified phenolic heat insulating material and preparation method thereof
  • Moisture-proof modified phenolic heat insulating material and preparation method thereof
  • Moisture-proof modified phenolic heat insulating material and preparation method thereof

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preparation example Construction

[0030] A moisture-proof modified phenolic heat insulating material and a preparation method, comprising the following steps:

[0031] (1) Preparation of hydrophobic agent: the hydrophobic modifier is mixed with a catalyst and a solvent to obtain a hydrophobic agent with hydrophobic modification function;

[0032] (2) Hydrophobization reaction: the hydrophobization reagent is added to the phenolic heat insulating material and soaked at room temperature to carry out the hydrophobization reaction.

[0033] (3) Drying: After the hydrophobicization reaction is completed, under in-situ conditions, the excess hydrophobicizing agent is removed by drying to obtain a moisture-proof modified phenolic heat insulating material.

[0034] In some embodiments of the present invention, in step (1), the modifier is a reagent with formula (1), (2) or (3),

[0035]

[0036] where R 1 Choose from -H, -CN, -NO 2 , -SO 2 R 7 , -SO 2 N R 7 R 8 , -COR 7 , -COOR 7 , -CONR 7 R 8 one of th...

Embodiment 1

[0062] Take the size as 500mm×500mm×30mm, density 0.5g / cm 3 , a commercially available phenolic aerogel composite sheet with a room temperature thermal conductivity of 0.06 W / (m·K) without moisture-proof treatment was placed in a tank with a height of 1000mm×1000mm×500mm. A mixed solvent of 94 g of methyl acrylate, 9.4 g of triethylamine, and 7500 g of acetone was added to the tank, kept at room temperature and normal pressure for 6 hours, and then the plate was taken out and dried at 120°C for 12 hours. The surface of the material is in a hydrophobic state, the weight gain of the material is 3%, the moisture absorption rate is 0.7%, and the change of thermal conductivity at room temperature is less than 1%.

Embodiment 2

[0064] Take the size as 500mm×500mm×30mm, density 0.5g / cm 3, a commercially available phenolic aerogel composite sheet with a room temperature thermal conductivity of 0.06 W / (m·K) without moisture-proof treatment was placed in a tank with a height of 1000mm×1000mm×500mm. A mixed solvent of 94 g of methyl acrylate, 9.4 g of ammonia water, and 7500 g of acetone was added to the tank, kept at room temperature and normal pressure for 6 hours, then the plate was taken out and dried at 120°C for 12 hours. The surface of the material is in a hydrophobic state, the weight gain of the material is 3.5%, the moisture absorption rate is 0.6%, and the thermal conductivity at room temperature does not change <1%.

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Abstract

The invention belongs to the technical field of thermal protection, and discloses a moisture-proof modified phenolic heat insulating material and a preparation method. It includes the following steps: (1) preparing a hydrophobic agent: mixing the hydrophobic modifier with a catalyst and a solvent to obtain a hydrophobic agent with a hydrophobic modification function; (2) hydrophobicizing reaction: adding the hydrophobicizing agent to The phenolic insulating material is soaked at room temperature for hydrophobicization reaction. (3) Drying: After the hydrophobicization reaction is completed, under in-situ conditions, the excess hydrophobicizing agent is removed by drying to obtain a moisture-proof modified phenolic heat insulating material. The moisture-proof modified phenolic heat insulating material of the present invention has excellent moisture-proof performance.

Description

technical field [0001] The invention relates to the technical field of thermal protection, in particular to a moisture-proof modified phenolic heat insulating material and a preparation method. Background technique [0002] The description of the background technology in the present invention belongs to the related art related to the present invention, and is only used to illustrate and facilitate the understanding of the invention content of the present invention, and should not be construed as the applicant's explicit belief or presumption that the applicant believes that the present invention is the first application of the present invention. the prior art of the filing date. [0003] Porous thermal insulation materials represented by phenolic thermal insulation materials, especially phenolic aerogel composite materials, have many advantages such as ablation resistance, light weight, excellent thermal insulation performance, stable performance, and low cost. It is widely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08L61/06
CPCC08J9/40C08J2361/06
Inventor 黄红岩张恩爽徐春晓郭慧李健曹杰李文静张凡杨洁颖张昊赵英民裴雨辰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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