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Preparation method of aerogel felt heat insulation material

A technology of heat insulation and airgel felt, which is applied in the field of heat insulation materials, can solve problems such as felt body falling off, health threats to construction personnel, and inconvenience in construction, etc., to achieve reduced powder drop, orderly and complete pore structure distribution, The effect of ensuring uniformity

Active Publication Date: 2018-12-14
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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  • Preparation method of aerogel felt heat insulation material

Examples

Experimental program
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 Stir F solution and 0.2moL / L ammonia water 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 heating cond...

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 Stir F solution and 0.2moL / L ammonia water 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 heating ...

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 Stir F solution and 0.2moL / L ammonia water 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) under h...

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Abstract

The invention belongs to the field of heat insulation materials and discloses a preparation method of an aerogel felt heat insulation material. Orthosilicic acid ester, ethanol and water are uniformlymixed, NH4F solution and ammonia water are sequentially added and uniformly stirred to obtain silica sol A; a resin, an initiator, a coupling agent and hollow glass beads are uniformly stirred and mixed in a sealable container to obtain a slurry B; a fiber felt is first impregnated in the silica sol A, then impregnated in the freshly prepared slurry B after being taken out, and the operation is repeated for 3 to 4 times so that the silica sol A is always in a stirring state when the fiber felt is impregnated in the slurry B, and then the fiber felt is taken out and placed in a vacuum condition for sealing and standing; the obtained fiber felt is subjected to aging and modifying, solvent replacing is performed by absolute ethanol, drying and heat treatment are performed to obtain the aerogel felt heat insulation material. On the premise of not affecting the heat insulation effect of the felt body, the invention overcomes the situation that the powder of the traditional silica aerogel felt falls off.

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 Applications(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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