Aerogel coating, preparation method thereof, aerogel coating, and preparation method thereof

A technology of airgel and airgel powder, which is applied in coatings, fireproof coatings, cement production, etc., and can solve problems such as limited thermal insulation effect, limited contact of composite thermal insulation boards, and small amount of airgel doping

Active Publication Date: 2021-05-28
CHINA NUCLEAR POWER TECH RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite insulation board prepared by this method has the problems of limited contact between airgel and porous geopolymer composite insulation board, and the small amount of aerogel doping leads to limited insulation effect, and the board material does not have adhesiveness and coating properties. It is difficult to apply to the bonding and heat preservation of some irregular surfaces and tanks, etc.

Method used

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  • Aerogel coating, preparation method thereof, aerogel coating, and preparation method thereof
  • Aerogel coating, preparation method thereof, aerogel coating, and preparation method thereof
  • Aerogel coating, preparation method thereof, aerogel coating, and preparation method thereof

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preparation example Construction

[0034] see figure 1 , the preparation method of the airgel coating of an embodiment, comprises the steps:

[0035] Step S110: Mix and stir slag powder, fly ash, water glass and water to prepare geopolymer slurry.

[0036] The step of mixing and stirring slag powder, fly ash, water glass and water comprises: first mixing slag powder, fly ash and water glass with a mass ratio of 4:(0.2~4):(0.5~2) to prepare dry powder, and then mix the dry powder with water, the mass ratio of the dry powder to water is 1: (0.2-0.5).

[0037] Specifically, in the step of mixing slag powder, fly ash and water glass, they are mixed in a dry powder mixer.

[0038] In the step of mixing the dry powder and water, stir in a high-speed mixer for 2 minutes to 10 minutes, so that the geopolymer slurry is mixed evenly and there are no large particles.

[0039] The above-mentioned geopolymer slurry has the advantages of high compressive strength (30MPa-100MPa), high temperature resistance (not lower than...

Embodiment 1

[0079] The preparation process of the airgel coating of the present embodiment is specifically as follows:

[0080] (1) Mix ethyl orthosilicate and ethanol evenly to form solution A, then add deionized water dropwise to solution A (molar ratio of ethyl orthosilicate, ethanol to water is 1:10:5), add Hydrochloric acid was used to adjust the pH to 2, and after the sol was formed, ammonia water was added to adjust the pH to 8 to prepare a silica gel. After aging the silica gel in ethanol for 2 days, 2 Drying was carried out (the drying temperature was 40° C. and the pressure was 9 MPa) to prepare an airgel block.

[0081] (2) Heat-treating the airgel block in a tube furnace at 500° C. for 1 hour to obtain a high-temperature-resistant airgel block. The high temperature resistant airgel block is made into airgel powder by ball milling method.

[0082] (3) Grinding blast furnace slag into fine slag powder by means of ball milling and physical screening. Mix fine slag powder, fly ...

Embodiment 2

[0087] The preparation process of the airgel coating of the present embodiment is specifically as follows:

[0088](1) Mix ethyl orthosilicate and ethanol evenly to form solution A, then add deionized water dropwise into solution A (molar ratio of ethyl orthosilicate, ethanol, water 1:10:5), adjust the pH After the sol is formed, add SiC powder (the molar ratio of SiC to tetraethyl orthosilicate is 0.06:1), and continue stirring to disperse. After the sol is formed, add ammonia water to adjust the pH to 8 to prepare silica gel. The silica gel was aged in ethanol for 2 days, and then subjected to supercritical CO 2 Drying was carried out (the drying temperature was 40° C. and the pressure was 9 MPa) to prepare an airgel block.

[0089] (2) Heat-treating the airgel block in a tube furnace at 500° C. for 1 hour to obtain a high-temperature-resistant airgel block. The airgel block is made into airgel powder by ball milling method.

[0090] (3) Grinding blast furnace slag into f...

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Abstract

The invention relates to an aerogel coating, a preparation method thereof, aerogel coating, and a preparation method thereof The preparation method of the aerogel coating comprises the following steps: mixing slag powder, fly ash and water glass according to a mass ratio of 4 : (0.2-4) : (0.5-2) to prepare dry powder, and mixing the dry powder with water according to a mass ratio of 1 : (0.2-0.5) to prepare geopolymer slurry; and mixing the aerogel powder with the geopolymer slurry to prepare the aerogel coating. According to the preparation method of the aerogel coating, the prepared aerogel coating has good cohesiveness, high temperature resistance and heat preservation performance.

Description

technical field [0001] The invention relates to the field of airgel coatings, in particular to an airgel coating and a preparation method thereof, an airgel coating and a preparation method thereof. Background technique [0002] Traditional airgel coating materials mostly use organic binder components, which have the advantage of good adhesion, but there are problems that they cannot be heated for a long time and are easy to age and fall off. For example, a traditional technology discloses a silicon dioxide gas A method for preparing silica airgel paint by stirring and grinding gel powder, organic adhesive, curing agent and film-forming aid as raw materials. It is characterized in that the selected formula makes the coating and the substrate well bonded, which can effectively insulate heat, reduce explosion deformation, and has protective functions. At the same time, the preparation process is simple and the cost is low. However, the main components of the airgel adhesive u...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/61
CPCC09D1/00C09D7/61C09D7/70C09D5/18Y02P40/10C09D1/02C08K7/26
Inventor 赵园魏欢怡仇若翔王开拓曾献邹青段承杰林继铭
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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