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Preparation method of anti-powder-falling composite silicon dioxide aerogel felt

A technology of composite silica and airgel felt, applied in chemical instruments and methods, lamination devices, lamination auxiliary operations, etc., can solve the problems of powder falling off, etc., to improve heat insulation performance and light curing speed Fast, compression-enhancing effects

Active Publication Date: 2020-04-10
GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of powder-drop-proof composite silica airgel felt, which can enhance the mechanical properties of the airgel felt without affecting the heat insulation effect of the airgel felt, and overcome the traditional Silica airgel felt powder falling off, reducing the dust pollution problem of airgel in storage, transportation, installation and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of anti-powder falling composite silica airgel felt, the steps are as follows:

[0029] S1, preparation of silica airgel felt:

[0030] S1.1. Mix ethyl orthosilicate, absolute ethanol and water evenly, and then add 2 mol / L NH 4 F solution and 0.2moL / L ammonia water were stirred evenly to obtain silica sol; wherein, in terms of molar ratio, tetraethyl orthosilicate: absolute ethanol: water=1:8:2; NH 4 The amount of F solution added is guaranteed in molar ratio, NH 4 F: tetraethyl orthosilicate=0.002:1; 3 : ethyl orthosilicate = 0.015: 1;

[0031] S1.2. After immersing the glass fiber mat in silica sol for 24 h, let it stand and age at 60 °C for 20 h, and then perform supercritical drying treatment to obtain a silica airgel mat;

[0032] S2. Composite silica airgel felt:

[0033] S2.1. Disperse the hot melt adhesive powder and short fiber in water, stir and mix evenly to obtain a viscous slurry; wherein, in terms of mass ratio, hot melt adhesive ...

Embodiment 2

[0040] A preparation method of anti-powder falling composite silica airgel felt, the steps are as follows:

[0041] S1, preparation of silica airgel felt:

[0042] S1.1. Mix ethyl orthosilicate, absolute ethanol and water evenly, and then add 2 mol / L NH 4 F solution and 0.2moL / L ammonia water were stirred evenly to obtain silica sol; wherein, in terms of molar ratio, tetraethyl orthosilicate: absolute ethanol: water=1:10:3; NH 4 The amount of F solution added is guaranteed in molar ratio, NH 4 F: tetraethyl orthosilicate=0.008:1; 3: ethyl orthosilicate = 0.008: 1;

[0043] S1.2. After immersing the rock wool fiber felt in silica sol for 18 hours, let it stand and age at 45°C for 18 hours, and then perform supercritical drying treatment to obtain a silica airgel felt;

[0044] S2. Composite silica airgel felt:

[0045] S2.1. Disperse the hot-melt adhesive powder and short fibers in water, stir and mix evenly to obtain a viscous slurry; wherein, in terms of mass ratio, hot-...

Embodiment 3

[0052] A preparation method of anti-powder falling composite silica airgel felt, the steps are as follows:

[0053] S1, preparation of silica airgel felt:

[0054] S1.1. Mix ethyl orthosilicate, absolute ethanol and water evenly, and then add 2 mol / L NH 4 F solution and 0.2moL / L ammonia water were stirred evenly to obtain silica sol; wherein, in terms of molar ratio, tetraethyl orthosilicate: absolute ethanol: water=1:5:2; NH 4 The amount of F solution added is guaranteed in molar ratio, NH 4 F: tetraethyl orthosilicate=0.01:1; 3 : ethyl orthosilicate = 0.005: 1;

[0055] S1.2. After immersing the aluminum silicate fiber felt in the silica sol for 12 hours, let it stand and age at 30°C for 10 hours, and then perform supercritical drying treatment to obtain a silica airgel felt;

[0056] S2. Composite silica airgel felt:

[0057] S2.1. Disperse the hot melt adhesive powder and short fiber in water, stir and mix evenly to obtain a viscous slurry; wherein, in terms of mass r...

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Abstract

The invention belongs to the field of thermal insulation materials, and discloses a preparation method of an anti-powder-falling composite silicon dioxide aerogel felt. The preparation method comprises the following steps: S1, preparing a silicon dioxide aerogel felt; S2, dispersing hot melt adhesive powder and short fibers into water, uniformly stirring and mixing to obtain a slurry, uniformly coating one surface of the silicon dioxide aerogel felt with the slurry, then superposing another silicon dioxide aerogel felt on the silicon dioxide aerogel felt, repeatedly superposing multiple timesaccording to a silicon dioxide aerogel felt-slurry-silicon dioxide aerogel felt mode, and carrying out hot press molding to obtain a composite silicon dioxide aerogel felt; and S3, uniformly mixing aphotocuring resin and a photoinitiator to obtain a photocuring agent, uniformly spraying the front surface and the back surface of the composite silicon dioxide aerogel felt with the photocuring agentby using a spraying method, and carrying out ultraviolet curing to obtain the composite anti-powder-falling silicon dioxide aerogel felt. According to the invention, under the premise of no influenceon the heat insulation effect of the aerogel felt, the mechanical property of the aerogel felt is enhanced, and the defect of powder falling of the traditional silicon dioxide aerogel felt is overcome.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, and in particular relates to a method for preparing a powder-drop-proof composite silica airgel felt. Background technique [0002] At present, the development of new energy, the improvement of the utilization rate of existing energy and the conservation of energy have attracted great attention from all countries. my country is an energy-poor country, therefore, rational use of energy and energy conservation are of great significance to the sustainable development of our society. Adopting new technologies and processes to develop environmentally friendly heat insulation materials is one of the most effective and economical measures to save energy. [0003] SiO 2 As an emerging super heat insulation material, airgel has an extremely low thermal conductivity, which is far lower than the thermal conductivity of 0.25W / m K of static air at room temperature, and has an incomparable heat in...

Claims

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Application Information

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IPC IPC(8): B32B38/08B32B37/12B32B37/06B32B37/10B32B38/00B32B17/02B32B17/12B32B9/00B32B9/04B32B33/00
CPCB32B5/02B32B5/26B32B33/00B32B37/06B32B37/10B32B37/1207B32B38/00B32B38/08B32B2037/1215B32B2038/0076B32B2255/02B32B2255/26B32B2260/021B32B2260/04B32B2262/10B32B2262/101B32B2262/108B32B2307/304
Inventor 牛利伟姚栋嘉董会娜杨超张东生刘喜宗张继承
Owner GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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