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Aerosil heat insulation material for building walls

A technology of silica and thermal insulation materials, applied in the field of thermal insulation materials for building walls, can solve problems such as low mechanical strength, poor toughness, and high risk, and achieve improved mechanical strength and toughness, good stability and heat resistance, The effect of improving mechanical properties

Inactive Publication Date: 2018-04-13
成都圻坊生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insulation materials for building walls are mainly divided into inorganic materials and organic materials. Among them, organic materials are easy to release harmful gases during use and have the characteristics of being combustible. Organic materials are more risky when used as wall insulation materials; inorganic materials have Good inertness, but inorganic materials still have problems such as high thermal conductivity, high density and poor hydrophobicity to be overcome
[0003] At present, the most widely used inorganic thermal insulation material is silica airgel material, which is a nano-sized pore material with a very high porosity of 80%-99%, and its thermal conductivity is 0.012-0.016 in air at normal temperature and pressure. W / (m·K), which is lower than 0.024W / (m·K) of static air; however, the network skeleton of pure silica airgel is very fragile, with low mechanical strength and poor toughness, which limits its application in the field of thermal insulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A silica airgel insulation material for building walls, which mainly includes 65 parts of silica sol, 12 parts of polyethylene glycol, 9.5 parts of glass fiber and 0.35 parts of crosslinking agent in terms of parts by mass. The agent is adipic acid.

[0018] The thermal insulation material is prepared by adding tetraethyl orthosilicate, ethanol, deionized water and hydrochloric acid solution into a beaker, mixing and stirring evenly, adjusting pH = 3, stirring and hydrolyzing at 45°C to obtain silica sol, wherein the molar ratio of water to silicon is 3:1; then dissolve polyethylene glycol in silica sol, add crosslinking agent adipic acid for crosslinking reaction, then add 0.5mol / L ammonia solution dropwise for crosslinking reaction to prepare airgel placing the glass fiber at the bottom of the mold, casting the airgel, modifying it with a hydrophobic solution, and drying it to prepare a high-toughness silica airgel insulation material for building walls.

[0019] The...

Embodiment 2

[0023] A silica airgel thermal insulation material for building walls, which mainly includes 70 parts of silica sol, 15 parts of polyethylene glycol, 10 parts of glass fiber and 0.42 parts of crosslinking agent in terms of parts by mass. The agent is adipic acid.

[0024] The thermal insulation material is prepared by adding tetraethyl orthosilicate, ethanol, deionized water and hydrochloric acid solution into a beaker, mixing and stirring evenly, adjusting pH = 3, stirring and hydrolyzing at 45°C to obtain silica sol, wherein the molar ratio of water to silicon is 2:1; then dissolve polyethylene glycol in silica sol, add crosslinking agent adipic acid for crosslinking reaction, then add 0.5mol / L ammonia solution dropwise for crosslinking reaction to prepare airgel placing the glass fiber at the bottom of the mold, casting the airgel, modifying it with a hydrophobic solution, and drying it to prepare a high-toughness silica airgel insulation material for building walls.

[00...

Embodiment 3

[0029]A silica airgel insulation material for building walls, which mainly includes 70 parts of silica sol, 15 parts of polyethylene glycol, 15 parts of glass fiber and 0.42 parts of crosslinking agent in terms of parts by mass. The agent is adipic acid.

[0030] The thermal insulation material is prepared by adding tetraethyl orthosilicate, ethanol, deionized water and hydrochloric acid solution into a beaker, mixing and stirring evenly, adjusting pH = 3, stirring and hydrolyzing at 45°C to obtain silica sol, wherein the molar ratio of water to silicon is 3:1; then dissolve polyethylene glycol in silica sol, add crosslinking agent adipic acid for crosslinking reaction, then add 0.5mol / L ammonia solution dropwise for crosslinking reaction to prepare airgel placing the glass fiber at the bottom of the mold, casting the airgel, modifying it with a hydrophobic solution, and drying it to prepare a high-toughness silica airgel insulation material for building walls.

[0031] The v...

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PUM

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Abstract

The invention discloses an aerosil heat insulation material for building walls. The aerosil heat insulation material mainly comprises, by mass, 40-70 parts of silica sol, 12-25 parts of polyethylene glycol, 5.5-11.5 parts of glass fibers and 0.25-0.75 part of a cross-linking agent. The toughness of the aerosil is modified with the polyethylene glycol, and the mechanical properties of the aerosil are modified with the glass fibers, so the aerosil material has good stability and good heat resistance when used as a heat insulation material, and is an environmentally-friendly material.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials for building walls, and in particular relates to a silica airgel thermal insulation material for building walls. Background technique [0002] With the development of society, the energy crisis is getting worse day by day, energy conservation and emission reduction has become a very important development strategy in our country. According to statistics, building energy consumption accounts for about 20% of total energy consumption, so the thermal insulation performance of building materials is very important, especially building wall materials. Insulation materials for building walls are mainly divided into inorganic materials and organic materials. Among them, organic materials are easy to release harmful gases during use and have the characteristics of being combustible. Organic materials are more risky when used as wall insulation materials; inorganic materials have Better...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/02C04B38/00C04B111/27C04B111/20
CPCC04B30/02C04B38/00C04B2111/2084C04B2111/27C04B2201/20C04B2201/32C04B2201/50C04B24/32C04B14/42C04B24/04C04B38/0074
Inventor 张欢
Owner 成都圻坊生物科技有限公司
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