Composite thermal insulation material and preparation method thereof

A thermal insulation material and composite thermal insulation technology, applied in the field of composite thermal insulation material and its preparation, cement-based silica airgel-diatomite composite thermal insulation material and its preparation, can solve the problem of low strength and low price Expensive, reducing the thermal conductivity of cement-based materials and other issues, to achieve low thermal conductivity, make up for thermal insulation performance, and good thermal insulation performance

Active Publication Date: 2020-11-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: In order to overcome the deficiencies and problems in the prior art, the purpose of the present invention is to provide a composite thermal insulation material and its preparation method, specifically to provide a cement-based silica airgel-diatomite composite The thermal insulation material and its preparation method are simple in process, low in cost, easy to industrialized production and have a certain strength, which overcomes the shortcomings of silica airgel that cannot be widely used in the construction industry due to its high price and low strength. Adjusting the indoor temperature can greatly reduce the thermal conductivity of cement-based materials and greatly save energy

Method used

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  • Composite thermal insulation material and preparation method thereof
  • Composite thermal insulation material and preparation method thereof
  • Composite thermal insulation material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] A composite thermal insulation material (1#), the composite thermal insulation material is a cement-based silica airgel-diatomite composite thermal insulation material, including the following components in parts by mass:

[0040]

[0041] Wherein: the coupling agent is a liquid silane coupling agent, the redispersible latex powder is a solid powder, the polypropylene fiber length is between 6 mm and 12 mm, and the cellulose ether is a solid powder hydroxypropyl Methyl cellulose, viscosity 100000MPa·s.

[0042] A kind of preparation method of above-mentioned composite thermal insulation material, comprises the following steps (as Figure 7 shown):

[0043] 1) Fly ash and sodium carbonate are mixed and ground to below 200 mesh according to the mass ratio of 1:1.5, and then calcined at 850°C for 2 hours to obtain a calcined mixture;

[0044] 2) Hydrolyze the calcined mixture with feasible acid sulfuric acid, then adjust the pH to 3 with 5 mol / L ammonia solution, and ...

Embodiment 2

[0050] A composite thermal insulation material (2#), the composite thermal insulation material is a cement-based silica airgel-diatomite composite thermal insulation material, including the following components in parts by mass:

[0051]

[0052] Wherein: the coupling agent is a liquid silane coupling agent, the redispersible latex powder is a solid powder, the polypropylene fiber length is between 6 mm and 12 mm, and the cellulose ether is a solid powder hydroxypropyl Methyl cellulose, viscosity 100000MPa·s.

[0053] A kind of preparation method of above-mentioned composite thermal insulation material, comprises the following steps (as Figure 7 shown):

[0054] 1) Fly ash and sodium carbonate are mixed and ground to below 200 mesh according to the mass ratio of 1:1.5, and then calcined at 850°C for 2 hours to obtain a calcined mixture;

[0055] 2) Hydrolyze the calcined mixture with feasible acid sulfuric acid, then adjust the pH to 3 with 5 mol / L ammonia solution, and ...

Embodiment 3

[0061] A composite thermal insulation material (3#), the composite thermal insulation material is a cement-based silica airgel-diatomite composite thermal insulation material, including the following components in parts by mass:

[0062]

[0063] Wherein: the coupling agent is a liquid silane coupling agent, the redispersible latex powder is a solid powder, the polypropylene fiber length is between 6 mm and 12 mm, and the cellulose ether is a solid powder hydroxypropyl Methyl cellulose, viscosity 100000MPa·s.

[0064] A kind of preparation method of above-mentioned composite thermal insulation material, comprises the following steps (as Figure 7 shown):

[0065] 1) Fly ash and sodium carbonate are mixed and ground to below 200 mesh according to the mass ratio of 1:1.5, and then calcined at 850°C for 2 hours to obtain a calcined mixture;

[0066] 2) Hydrolyze the calcined mixture with feasible acid sulfuric acid, then adjust the pH to 3 with 5 mol / L ammonia solution, and ...

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Abstract

The invention discloses a composite thermal insulation material and a preparation method thereof. The composite thermal insulation material is a cement-based silica airgel-diatomite composite thermal insulation material, which includes: silicon dioxide gas in parts by mass 40-70 parts of gel-diatomite material, 100 parts of cement, 0.4-1.2 parts of polypropylene fiber, 4.2-5.1 parts of coupling agent, 0.56-1.2 parts of cellulose ether, 2.8-5.1 parts of redispersible latex powder. The composite thermal insulation material uses fly ash as the raw material and diatomite as the strength support material, and obtains silica aerogel through steps such as high-temperature calcination, sol-gel, negative pressure adsorption, water bath modification, and atmospheric pressure drying. The diatomite material is obtained by dry mixing with cement and an appropriate amount of admixture and evenly adding water and stirring. The preparation method is simple and low in cost. The obtained composite thermal insulation material has good application performance and the strength meets the requirements for building use.

Description

technical field [0001] The invention relates to a composite thermal insulation material and a preparation method thereof, in particular to a cement-based silica airgel-diatomite composite thermal insulation material and a preparation method thereof, belonging to the field of thermal insulation materials. Background technique [0002] As global warming intensifies and sea levels rise year by year, building energy efficiency has become an inevitable issue in the development of the construction industry. The use of thermal insulation materials is an important way to achieve building energy conservation. As the solid material with the lowest density at present, silica airgel is a research hotspot in thermal insulation. The traditional preparation method uses organic solvents as raw materials and prepares them by supercritical drying. However, the cost of equipment is high, the parameter control is complex, time-consuming, continuous production is not possible, flammable and toxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/08C04B28/00
CPCC04B28/00C04B2111/40C04B2201/50C04B14/064C04B14/08C04B16/0633C04B24/383C04B24/24C04B24/42C04B38/08Y02W30/91
Inventor 刘志勇张舒蒋金洋张云升吴萌
Owner SOUTHEAST UNIV
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