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A kind of airgel flame retardant thermal insulation foam coating with graded pore microstructure and preparation method thereof

A flame retardant thermal insulation and aerogel technology, applied in the field of materials, can solve the problems of no adhesion, easy cracking, low mechanical modulus, etc., and achieves excellent construction performance, excellent thermal insulation and flame retardant performance, and low thermal conductivity. Effect

Active Publication Date: 2020-12-25
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-density airgel material developed in recent years has a good thermal insulation effect, but its mechanical modulus is low
Compared with traditional external wall insulation materials, airgel is fragile, and the blocks made of airgel particles are prone to cracks and do not have good adhesion

Method used

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  • A kind of airgel flame retardant thermal insulation foam coating with graded pore microstructure and preparation method thereof
  • A kind of airgel flame retardant thermal insulation foam coating with graded pore microstructure and preparation method thereof
  • A kind of airgel flame retardant thermal insulation foam coating with graded pore microstructure and preparation method thereof

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Effect test

preparation example Construction

[0033] The present invention provides a kind of preparation method of the airgel flame-retardant heat-retaining foam type coating that has hierarchical pore microstructure, comprising:

[0034] A) dispersing the thickener, curing agent, foaming agent and reinforcing fiber in a solvent to obtain a thickening solution;

[0035] B) mixing the thickening solution and the water-based resin to obtain a mixed solution;

[0036] C) Mixing the mixed solution and the airgel powder to obtain a creamy coating, which is an airgel flame-retardant thermal insulation foam coating with a hierarchical pore microstructure.

[0037] In the airgel flame-retardant thermal insulation foam coating with graded pore microstructure provided by the invention, thickener, curing agent, foaming agent and reinforcing fiber are dispersed in a solvent and stirred to obtain a thickened solution. The present invention does not limit the specific operation of the dispersing and stirring, as long as those skilled...

Embodiment 1

[0065] Disperse 4g sodium carboxymethylcellulose, 1.25g p-toluenesulfonic acid, and 1g glass fiber (Shanghai Sinopharm Group) in 100ml deionized water, stir overnight, then add 4g whey protein to obtain a high-viscosity light yellow solution, wait use.

[0066] Take 20ml of the above solution into a beaker, add 10g of commercial melamine formaldehyde resin, 20g of commercial silica airgel powder, and stir for 10-20min to obtain a usable airgel foam coating. Coated on the surface of PVC plastic pipes and dried for 3 to 5 days to obtain the final coating product, such as figure 1 shown. The coating has obvious hydrophobicity, and its contact angle is 138°, such as figure 2 shown. The microstructure of the sample is a closed-cell foam structure with hierarchical pores, such as image 3 shown. After etching the silica airgel powder particles with NaOH, it can be seen that the macropores are overlapped by a three-dimensional network resin, such as Figure 4 and 5 shown.

...

Embodiment 2

[0069] Disperse 4g sodium carboxymethylcellulose, 1.25g p-toluenesulfonic acid, and 1g glass fiber (Shanghai Sinopharm Group) in 100ml deionized water, stir overnight, then add 4g whey protein to obtain a high-viscosity light yellow solution, wait use.

[0070] Take 20ml of the above solution into a beaker, add 10g of commercial melamine formaldehyde resin, add 5, 10, 15, and 20g of commercial silica airgel powder, and stir for 10-20min to obtain a usable airgel foam coating. After drying for 3 to 5 days, the final coating product is obtained, and the microstructure is as follows: Figure 8 shown. Depend on Figure 8 It can be seen that the airgel content affects the cell size.

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Abstract

The invention provides a preparation method of aerogel flame retardant insulating foam coating with a grade hole microstructure. The preparation method includes the steps that a thickening agent, a curing agent, a foaming agent and a reinforced fiber are dispersed in a solvent, and a thickening solution is obtained; the thickening solution and water-base resin are mixed to obtain a mixed solution;and the mixed solution and aerogel powder are mixed to obtain butyrous coating, and that is the aerogel flame retardant insulating foam coating. The prepared aerogel flame retardant insulating foam coating has good sagging performance and construction performance, either the facade or the ceiling can be coated, and adhesives used in insulation boards do not need to be used; the density of the prepared aerogel flame retardant insulating foam coating is small (minimum: 100 mg / cm3), the aerogel flame retardant insulating foam coating has lower thermal conductivity than traditional external wallouter insulating materials, and thermal insulating performance and fireproof performance are achieved; and at the same time, by changing the content of the curing agent, the resin, aerogel and the reinforced fiber, the grade hole microstructure, the density and the mechanical performance of the coating can be controlled.

Description

technical field [0001] The invention relates to the field of material technology, in particular to an airgel flame-retardant and thermal insulation foam coating with hierarchical pore microstructure and a preparation method thereof. Background technique [0002] Thermal insulation materials are a class of materials with wide application fields and huge application prospects in engineering, and have penetrated into various fields such as national defense and military industry, aerospace, transportation, biomedicine, and construction engineering. At the same time, lighter and stronger materials can greatly reduce human survival costs and effectively alleviate human demand for energy without affecting human needs. At present, the insulation materials on the market are mainly EPS, XPS and rock wool. Among them, EPS and XPS materials often cause high-rise fires due to unreasonable use in recent years, or are easily affected by the climate, and fall off from the outer walls of hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D161/28C09D1/00C09D7/61C09D7/65C09D5/18C08J9/30
CPCC08J9/30C09D1/00C09D5/18C09D161/28C09D7/61C09D7/65C09D7/70C08L1/286C08L89/00C08K7/14
Inventor 俞书宏马致远于志龙
Owner UNIV OF SCI & TECH OF CHINA
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