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A kind of preparation method of anti-powder dropping composite silica airgel 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: 2021-06-25
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 0.2 mol / 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 adhesi...

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 0.2 mol / 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,...

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 0.2 mol / 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 mas...

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Abstract

The invention belongs to the field of thermal insulation materials and discloses a method for preparing a powder-drop-proof composite silica airgel felt. S1, preparing silica airgel felt; S2, dispersing hot melt adhesive powder and short fibers in water, stirring and mixing evenly to obtain slurry; evenly brushing the slurry on one side of the silica airgel felt, and then Overlay another silica airgel felt on it, repeat the stacking multiple times in the manner of silica airgel-slurry-silica airgel felt, and heat press to obtain a composite silica airgel felt ; S3, uniformly mix the photocurable resin and the photoinitiator to obtain a photocuring agent; spray the photocuring agent evenly on the front and back sides of the composite silica airgel felt by spraying, and UV-cure to obtain the composite Anti-shedding silica airgel felt. The invention enhances the mechanical properties of the airgel felt without affecting the heat insulation effect of the airgel felt, and overcomes the problem of powder falling off of the traditional silicon dioxide airgel felt.

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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Patent Type & Authority Patents(China)
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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