Preparation method of composite silicon dioxide aerogel felt

A technology of composite silica and aerogel felt, applied in the field of thermal insulation materials, can solve problems such as powder falling off, achieve the effects of stable bonding, improved mechanical properties, and prevention of powder falling

Active Publication Date: 2020-03-27
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 object of the present invention is to provide a preparation method of a 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 silicon dioxide Airgel felt powder falling off, reducing the dust pollution of airgel during storage, transportation, installation and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of composite silica airgel felt, the steps are as follows:

[0019] (1) According to the mass ratio of 15:80:45:0.06:20, weigh water, silica airgel powder, resin, curing agent, and low-density microspheres, and first mix the silica airgel powder and resin in Disperse evenly in water, then add low-density microspheres, stir evenly, finally add a curing agent, mix evenly, and obtain an airgel slurry; the resin is epoxy resin; the curing agent is methyltetrahydrophthalic anhydride; the Low-density microspheres are phenolic hollow microspheres (density 0.1~0.6 g / cm 3 );

[0020] (2) Three single-layer glass fiber mats were respectively immersed in the airgel slurry for 24 h under vacuum to obtain three single-layer airgel fiber mats; then three single-layer airgel fiber mats were The mats are stacked together to obtain three layers of airgel fiber mats;

[0021] (3) The three-layer airgel fiber mat was cured according to the curing process of first h...

Embodiment 2

[0024] A preparation method of composite silica airgel felt, the steps are as follows:

[0025] (1) According to the mass ratio of 25:70:60:0.08:15, weigh water, silica airgel powder, resin, curing agent, and low-density microspheres, and first mix the silica airgel powder and resin in Disperse evenly in water, then add low-density microspheres, stir evenly, finally add a curing agent, mix evenly, and obtain an airgel slurry; the resin is epoxy resin; the curing agent is methyl hexahydrophthalic anhydride; the Low-density microspheres are hollow glass microspheres (density 0.1~0.6 g / cm 3 );

[0026] (2) Three single-layer ceramic fiber mats were impregnated in the airgel slurry for 18 h under vacuum to obtain three single-layer airgel fiber mats; then three single-layer airgel fiber mats were The mats are stacked together to obtain three layers of airgel fiber mats;

[0027] (3) The three-layer airgel fiber mat was cured according to the curing process of first holding at 9...

Embodiment 3

[0030] A preparation method of composite silica airgel felt, the steps are as follows:

[0031] (1) According to the mass ratio of 30:60:80:1:10, weigh water, silica airgel powder, resin, curing agent, and low-density microspheres, firstly mix the hydrophobized silica airgel powder and The resin is evenly dispersed in water, then low-density microspheres are added, stirred evenly, and finally a curing agent is added and mixed evenly to obtain an airgel slurry; the resin is a phenolic resin; the curing agent is hexamethylenetetramine; The low-density microspheres are hollow ceramic microspheres (with a density of 0.1-0.6 g / cm 3 );

[0032] (2) Three single-layer rock wool fiber mats were respectively immersed in the airgel slurry for 12 h under vacuum to obtain three single-layer airgel fiber mats; then the three single-layer airgel The fiber mats are stacked together to obtain three layers of airgel fiber mats;

[0033] (3) The three-layer airgel fiber mat was cured accordi...

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Abstract

The invention belongs to the field of thermal insulation materials, and discloses a preparation method of a composite silicon dioxide aerogel felt. The preparation method comprises the following steps: mixing water, silicon dioxide aerogel powder, resin, a curing agent and low-density microspheres to a uniform state to obtain aerogel slurry; dipping a plurality of single-layer fiber felts into theaerogel slurry to obtain a plurality of single-layer aerogel fiber felts; superposing the single-layer aerogel fiber felts together to obtain a multilayer aerogel fiber felt; and curing the multilayer aerogel fiber felt according to a curing process of preserving heat at 80-90 DEG C for 1-3h, preserving heat at 100-120 DEG C for 1-4h and finally preserving heat at 140-160 DEG C for 1-3h to obtainthe composite silicon dioxide aerogel felt. On the premise that the heat insulation effect of the aerogel felt is not affected, the mechanical property of the aerogel felt is enhanced, the situationthat powder falls off from a traditional silicon dioxide aerogel felt is overcome, and the dust pollution problem of aerogel in the storage, transportation, installation and use processes is reduced.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, and in particular relates to a preparation method of a 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 insulation effect w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/14C04B26/12C04B38/08C04B111/40
CPCC04B26/122C04B26/14C04B2111/40C04B2201/32C04B2201/50C04B14/064C04B16/04C04B24/10C04B14/42C04B40/0263C04B38/08C04B14/22C04B14/46C04B18/027C04B24/121
Inventor 姚栋嘉牛利伟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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