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A kind of preparation method of airgel blanket thermal insulation material

A technology for thermal insulation and aerogel felt, which is applied in the field of thermal insulation materials, and can solve the problems of high brittleness of aerogel, health threat to construction workers, and inconvenient construction.

Active Publication Date: 2021-08-24
GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the structural characteristics of airgel, airgel has disadvantages such as high brittleness and poor flexibility. At the same time, due to its preparation method, SiO 2 During the transportation, construction and use of airgel blankets, it is common for airgel powder to fall off from the felt body. The powder loss not only brings inconvenience to the construction, but also poses a threat to the health of the construction workers, and also reduces air condensation. The performance of the rubber felt itself greatly limits the application range of the airgel felt

Method used

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  • A kind of preparation method of airgel blanket thermal insulation material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of airgel blanket thermal insulation material, the steps are as follows:

[0029] (1) Mix ethyl orthosilicate, absolute ethanol and water evenly, then add 2 mol / L NH 4 F solution and 0.2 mol / L ammonia water were stirred evenly to obtain silica sol A;

[0030] (2) In parts by weight, stir and mix 20 parts of resin, 0.04 parts of initiator, 3 parts of coupling agent, and 100 parts of hollow glass microspheres in a sealable container to obtain slurry B;

[0031] (3) First immerse the glass fiber felt in the silica sol A obtained in step (1) for 6 hours, and then immerse it in the freshly prepared slurry B for 3 hours after taking it out;

[0032] (4), repeat the operation step (3) 4 times and the silica sol A is always in a stirring state when the glass fiber mat is impregnated in the slurry B, then take out the glass fiber mat and place it under vacuum condition for 2 h ;

[0033] (5) Aging the glass fiber mat obtained in step (4) under hea...

Embodiment 2

[0037] A kind of preparation method of airgel blanket thermal insulation material, the steps are as follows:

[0038] (1) Mix ethyl orthosilicate, absolute ethanol and water evenly, then add 2 mol / L NH 4 F solution and 0.2 mol / L ammonia water were stirred evenly to obtain silica sol A;

[0039] (2) In parts by weight, stir and mix 18 parts of resin, 0.05 parts of initiator, 4 parts of coupling agent, and 100 parts of hollow glass microspheres in a sealable container to obtain slurry B;

[0040] (3) First immerse the glass fiber felt in the silica sol A obtained in step (1) for 5 hours, and then immerse it in the freshly prepared slurry B for 3 hours after taking it out;

[0041] (4), repeat the operation step (3) three times and the silica sol A is always in a stirring state when the glass fiber mat is impregnated in the slurry B, then take out the glass fiber mat and place it under vacuum condition for 2 h ;

[0042] (5) Aging the glass fiber mat obtained in step (4) under...

Embodiment 3

[0046] A kind of preparation method of airgel blanket thermal insulation material, the steps are as follows:

[0047] (1) Mix ethyl orthosilicate, absolute ethanol and water evenly, then add 2 mol / L NH 4 F solution and 0.2 mol / L ammonia water were stirred evenly to obtain silica sol A;

[0048] (2) In parts by weight, stir and mix 15 parts of resin, 0.02 parts of initiator, 2 parts of coupling agent, and 100 parts of hollow glass microspheres in a sealable container to obtain slurry B;

[0049] (3) First immerse the glass fiber felt in the silica sol A obtained in step (1) for 6 h, then take it out and then immerse it in the freshly prepared slurry B for 2 h;

[0050] (4), repeat the operation step (3) three times and the silica sol A is always in a stirring state when the glass fiber mat is impregnated in the slurry B, then take out the glass fiber mat and place it under vacuum condition to seal and stand for 3 h ;

[0051] (5) Aging the glass fiber mat obtained in step (4...

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Abstract

The invention belongs to the field of thermal insulation materials and discloses a preparation method of an airgel blanket thermal insulation material. Mix orthosilicate, ethanol and water evenly, and add NH 4 Stir F solution and ammonia water evenly to obtain silica sol A; stir and mix resin, initiator, coupling agent, and hollow glass microspheres in a sealable container to obtain slurry B; Soak in the freshly prepared slurry B after taking it out, repeat the operation 3~4 times and the silica sol A is always in a stirring state when the fiber mat is dipped in the slurry B, then take out the fiber mat and place it in a vacuum The airgel blanket is sealed and left standing under the condition; the obtained fiber felt is subjected to aging and modification treatment, then solvent replacement is carried out with absolute ethanol, and then drying treatment and heat treatment are carried out to obtain the airgel felt heat insulation material. On the premise of not affecting the thermal insulation effect of the felt body, the invention overcomes the problem of powder falling off in the traditional silica airgel felt.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, and in particular relates to a preparation method of an airgel felt thermal insulation material. Background technique [0002] Airgel is a nanoporous material with a porosity as high as 80~99.8%, and its specific surface area can reach 200~1000m 2 / g, the density of airgel is extremely low, it is currently the lightest solid in the world, in addition, airgel also has low thermal conductivity (minimum 0.01W / m K), high porosity (up to 99%) , High light transmittance (up to 99%), low dielectric constant (as low as 1.0~2.0), low refractive index (as low as 1.05), etc. [0003] SiO 2 Compared with other traditional heat insulation materials, airgel felt has unparalleled advantages. It is the solid material with the best performance of heat insulation materials at present, and it is the first choice material for energy saving and consumption reduction. However, due to the structural chara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02C04B38/08C04B111/40
CPCC04B30/02C04B2111/40C04B2201/32C04B24/42C04B24/026C04B22/126C04B14/22C04B24/281C04B24/008C04B38/08C04B24/283C04B24/10C04B24/2611C04B24/40
Inventor 刘喜宗邓伟袁利娟张东生牛利伟姚栋嘉
Owner GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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