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Aerogel vacuum insulated panel and preparation method thereof

A vacuum insulation panel and airgel technology, applied in chemical instruments and methods, other household appliances, lamination, etc., can solve the requirements of reduced heat insulation effect, low composite degree of airgel powder and insulation felt, and core sealing requirements Advanced problems, to achieve the effect of improving the effective service life, flexible and convenient construction methods, and little impact on product performance

Inactive Publication Date: 2016-04-20
ZHUO DA NEW MATERIAL TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insulation mortar has the following disadvantages: high density: the weight of the insulation layer will easily bring difficulties to the construction, and increase the load-bearing burden of the building skeleton; high thermal conductivity, etc.
Airgel thermal insulation material is a new type of material. At present, the main product of airgel thermal insulation material on the market is airgel thermal insulation felt. Due to many restrictions, the composite degree of airgel powder and insulation felt is low. During the use process, airgel particles and dust will fall off, which will affect the environment. Therefore, during the use process, this problem should be solved. settle properly
Existing vacuum insulation panels generally have the disadvantages that the core material has high requirements for sealing and short life. When the cladding material fails, the product has no heat preservation effect, the core material is easy to absorb moisture, and the insulation board is easy to absorb moisture, resulting in a decrease in heat preservation effect.

Method used

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  • Aerogel vacuum insulated panel and preparation method thereof

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preparation example Construction

[0026] In one embodiment, the preparation method of the airgel vacuum insulation panel comprises the following steps:

[0027] Fabrication of rigid airgel insulation panels

[0028] The airgel composite insulation board composited with airgel and reinforcing fiber is prepared by the sol-gel method, and the proportion of airgel in the composite insulation board can be controlled by controlling the concentration of the solution, so as to produce airgel with different strengths Composite insulation board, the airgel composite insulation board prepared by normal pressure drying method has strong hydrophobic performance. Concrete preparation steps are as follows:

[0029]Preparation of sol→introduction of sol into a mold with reinforcing fiber gel→integrated aging and acid alcoholization→surface modification→drying at normal pressure→airgel insulation board.

[0030] Reinforcing fibers are fibrous reinforcing materials, including: inorganic fibers and organic fibers. For example...

Embodiment 1

[0042] Weigh 60 g of sodium water glass with a modulus of 2.8, add 100 g of pure water and stir evenly. Use 40wt% sulfuric acid to adjust the pH until it reaches 5. Pour the sol into a mold with a 10cm thick pre-oxygenated fiber felt. The sol will gel after 10min, and then stand at 50°C for 1h. Then the integrated aging hydrogel plate was treated at 50°C for 5 hours. Put the alcoholized gel plate into 1200ml of trimethyldisilane and treat it at 60°C. Hydrophobic modification and gel drainage will be completed in one step within 5 hours. After the liquid drainage is completed, heat-dry the wet gel plate at a temperature of 80°C, and the drying is completed within 30 minutes to obtain an airgel insulation board. Cover the airgel insulation board with a laminated bag, and evacuate it with a vacuum pump. The vacuum pressure is 0.2 Pa, and the airgel vacuum insulation panel is obtained by hot pressing and sealing. The airgel vacuum insulation panel has a smooth surface and a therm...

Embodiment 2

[0044] Weigh 60 g of sodium water glass with a modulus of 3.6, add 100 g of pure water and stir evenly. Use 40wt% sulfuric acid to adjust the pH until it reaches 4. Pour the sol into a mold with a 20cm thick glass fiber needle felt. The sol will gel after 30min, and then stand at 50°C for 1h. Then the integrated aging hydrogel plate was treated at 50°C for 5 hours. Put the alcoholized gel plate into 1200ml of trimethyldisilane and treat it at 60°C. Hydrophobic modification and gel drainage will be completed in one step within 5 hours. After the liquid drainage is completed, heat-dry the wet gel plate at a temperature of 80°C, and the drying is completed within 30 minutes to obtain an airgel insulation board. Cover the airgel insulation board with a laminated bag, and evacuate it with a vacuum pump. The vacuum pressure is 0.01Pa, and the airgel vacuum insulation panel is obtained by hot pressing and sealing. The airgel vacuum insulation panel has a smooth surface and a thermal...

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Abstract

The invention discloses an aerogel vacuum insulated panel and a preparation method thereof. The aerogel vacuum insulated panel comprises an insulating film and an aerogel thermal insulation board, wherein the insulating film is in a closed state, and a vacuum cavity is formed by the closed insulating film, and the formed aerogel thermal insulation board is mounted in the vacuum cavity. According to the aerogel vacuum insulated panel and the preparation method, a core material of the aerogel thermal insulation board is a low-carbon and environment-friendly thermal insulation board with good strength and has a very low heat conductivity coefficient and low requirements for vacuum equipment, the preparation process is substantially simplified, aerogel powder contained in the aerogel thermal insulation board has a very large specific surface area and has a good adsorption characteristic, and a degasser is not required to be added; the effective service life of the thermal insulation board can be prolonged, air leakage during packaging has small influence on product performance, the weather fastness is good, and the service life is longer; the construction method is more flexible and convenient, and the aerogel vacuum insulated panel has a nailing mounting characteristic which is not possessed by a conventional vacuum insulated panel.

Description

technical field [0001] The invention relates to the technical field of thermal insulation building materials, in particular to an airgel vacuum insulation panel and a preparation method thereof. Background technique [0002] At present, the external wall insulation of buildings requires the use of inorganic insulation materials for high-rise buildings, so most high-rise buildings use insulation mortar for insulation. Insulation mortar has the following disadvantages: high density: the weight of the insulation layer easily brings difficulties to the construction, and increases the load-bearing burden of the building skeleton; high thermal conductivity, etc. Airgel thermal insulation material is a new type of material. At present, the main product of airgel thermal insulation material on the market is airgel thermal insulation felt. Due to many restrictions, the composite degree of airgel powder and insulation felt is low. During the use process, airgel particles and dust wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/08B32B3/06B32B9/04B32B37/10B32B37/15C04B28/26
CPCB32B1/08B32B3/06B32B9/04B32B37/1009B32B37/15B32B2260/021B32B2307/304B32B2607/00C04B28/26
Inventor 杨卓舒邝清林刘国强刘建波冯强陈庚车君超
Owner ZHUO DA NEW MATERIAL TECH GRP
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