Aerogel building block and preparation method thereof

An aerogel and aerogel powder technology, which is applied in the field of blocks, can solve the problems of unfavorable aerogel block forming, poor mixing uniformity, loss of aerogel performance, etc., and achieves improved anti-splitting performance, The effect of reducing thermal conductivity and improving impermeability

Pending Publication Date: 2021-03-05
GUOJIA NEW MATERIAL HUBEI ENVIRONMENTAL PROT GEL IND PARK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, airgel powder is highly hydrophobic, difficult to use, difficult to uniformly and stably disperse in water-based systems, and the mixing uniformity with various organic and inorganic binders is not good, which is not conducive to the formation of airgel blocks
During the molding process, the structure of the airgel will be damaged to a certain extent, which will cause the loss of the performance of the airgel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The airgel block is made of the following raw materials in parts by weight: 3 parts of airgel powder, 15 parts of pure acrylic emulsion, 50 parts of cement mortar, 1 part of vitrified microbeads, 2 parts of glass fiber, 1.5 parts of dispersant, 10 parts of deionized water. The airgel powder is made of silica, the tap density of the airgel powder is 0.03-0.8 tons / cubic meter, the particle size is 0.015-0.1mm, and the density is 20-150 grams / liter; the preparation steps of the dispersant for:

[0032] Add PAMAM G3.0 into DMF and stir until uniformly mixed to obtain a PAMAM solution with a concentration of 0.05g / mL, add β-cyclodextrin to DMF and stir until uniformly mixed to obtain a cyclodextrin solution with a concentration of 0.1g / mL. Mix PAMAM solution and cyclodextrin solution with a volume ratio of 2:7, stir and react at 80°C for 8 hours, cool to room temperature to obtain a reaction solution, transfer the reaction solution into a dialysis bag for dialysis for 7 day...

Embodiment 2

[0060] The airgel block is made of the following raw materials in parts by weight: 2 parts of airgel powder, 20 parts of styrene-acrylic emulsion, 45 parts of cement, 3 parts of hollow glass microspheres, 3 parts of ceramic fiber, 1 part of dispersant, 12 parts of ionized water. The airgel powder is made of alumina, the tap density of the airgel powder is 0.03-0.8 tons / cubic meter, the particle size is 0.015-0.1mm, and the density is 20-150 grams / liter; the preparation steps of the dispersant and Example 1 is the same.

[0061] The preparation method of the airgel block comprises the following steps:

[0062] S1. Weigh each raw material by weight, add airgel powder, dispersant, and deionized water into the disperser, and stir until uniformly dispersed to obtain an airgel powder emulsion;

[0063] S2. Add the ceramic fiber to the airgel powder emulsion obtained in step S1, and stir until it is uniformly dispersed to obtain a mixed emulsion;

[0064] S3. Mix the styrene-acryl...

Embodiment 3

[0068] The airgel block is made of the following raw materials in parts by weight: 5 parts of airgel powder, 18 parts of silicone resin, 60 parts of gypsum powder, 0.5 part of heavy calcium powder, 1 part of alumina fiber, 2 parts of dispersant, 12 parts of deionized water. The airgel powder is made of titanium dioxide, the tap density of the airgel powder is 0.03-0.8 tons / cubic meter, the particle size is 0.015-0.1mm, and the density is 20-150 grams / liter; the preparation steps and implementation of the dispersant Example 1 is the same.

[0069] The preparation method of the airgel block comprises the following steps:

[0070] S1. Weigh each raw material by weight, add airgel powder, dispersant, and deionized water into the disperser, and stir until uniformly dispersed to obtain an airgel powder emulsion;

[0071] S2. adding alumina fibers to the airgel powder emulsion obtained in step S1, stirring until uniformly dispersed to obtain a mixed emulsion;

[0072] S3. Mix the ...

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Abstract

The invention provides an aerogel building block. The aerogel building block is prepared from the following raw materialsm by weight: 2-6 parts of aerogel powder, 10-20 parts of an organic binder, 40-60 parts of an inorganic binder, 0.5-5 part of a filler, 1-3 parts of a toughening agent, 1-2 parts of a dispersing agent and 9-15 parts of deionized water. The invention also discloses a preparationmethod of the aerogel building block. The aerogel building block provided by the invention is relatively low in heat conductivity coefficient and relatively low in density, and has the advantages of heat insulation and light weight.

Description

technical field [0001] The invention relates to a building block, in particular to an airgel building block and a preparation method thereof. Background technique [0002] The current blocks used in civil buildings only have a supporting function, and the effect of thermal insulation is relatively poor, and they are prone to water seepage, alkali return, poor durability, high density, and it is difficult to meet the requirements of building energy saving and emission reduction. Airgel blocks can effectively solve the above problems. After adding airgel, the block can significantly reduce the density, facilitate transportation, realize hydrophobic surface, and completely solve the problems of water seepage and alkali return on the wall. In addition, the amount of blocks used in civil buildings is huge, and by reducing their thermal conductivity to below 0.120W / (m·k) (25°C), energy saving and emission reduction can be effectively achieved. [0003] Airgel powder has excellent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B38/08
CPCC04B28/26C04B2201/32C04B2201/20C04B2201/50C04B22/143C04B14/064C04B14/303C04B14/305C04B14/306C04B16/08C04B24/2641C04B24/2676C04B24/42C04B14/24C04B14/28C04B14/042C04B14/04C04B18/08C04B2103/408C04B14/42C04B14/46C04B14/4625C04B14/386C04B22/002C04B38/08
Inventor 王泽金王翩徐小明王作勤
Owner GUOJIA NEW MATERIAL HUBEI ENVIRONMENTAL PROT GEL IND PARK CO LTD
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