Preparation method of anti-dusting silicon dioxide aerogel felt

A technology of silica and aerogel felt, applied in the field of thermal insulation materials, can solve the problems of high labor cost, inconvenient storage and transportation, construction and installation, difficult curling, bending, etc., to avoid large dust pollution. Effect

Active Publication Date: 2021-11-09
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

At present, the usual anti-powder solution is to use glass fiber cloth, aluminum foil cloth, etc. to stick on the surface of the airgel fiber mat. There is a situation that the airgel powder falls off from the felt body, and the flexibility of the material is reduced after the front and back sides are applied, and it is not easy to curl and bend, and the storage, transportation, construction and installation are not convenient enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a powder-proof silica aerogel felt, characterized in that the steps are as follows:

[0032] (1) Preparation of silica sol: take silicon source, ethanol and water and mix uniformly to obtain silica sol;

[0033] (2), impregnation treatment: adding a gelation catalyst to the sol obtained in step (1), stirring evenly to obtain a catalyzed silica sol, and dipping and gelling the glass fiber mat in the catalyzed silica sol to obtain dioxide dioxide Silicon wet gel felt;

[0034] (3), encapsulation treatment: the surface of the silica wet gel felt obtained in step (2) is encapsulated with a water-based adhesive, and the upper surface is reserved for no encapsulation, and the thickness of the encapsulation layer is 1 mm;

[0035] (4), aging treatment: the surface-encapsulated silica wet gel felt obtained in step (3) is subjected to 24h aging treatment at room temperature;

[0036] (5), hydrophobizing treatment: placing the aged silica wet gel felt obt...

Embodiment 2

[0045] A method for preparing a powder-proof silica aerogel felt, characterized in that the steps are as follows:

[0046] (1) Preparation of silica sol: take silicon source, ethanol and water and mix uniformly to obtain silica sol;

[0047] (2), impregnation treatment: the aluminum silicate fiber felt is dipped in the silica sol in step (1), and then a gelation catalyst is added to obtain a silica wet gel felt;

[0048] (3), encapsulation treatment: the surface of the silica wet gel felt obtained in step (2) is encapsulated with a flame retardant coating, and the lower surface is reserved for no encapsulation, and the thickness of the encapsulation layer is 1.5 mm;

[0049](4), aging treatment: the surface-encapsulated silica wet gel felt obtained in step (3) is subjected to 10h aging treatment under the condition of heating at 40°C;

[0050] (5), hydrophobizing treatment: placing the aged silica wet gel felt obtained in step (4) in an absolute ethanol solution containing 1%...

Embodiment 3

[0060] A method for preparing a powder-proof silica aerogel felt, characterized in that the steps are as follows:

[0061] (1) Preparation of silica sol: take silicon source, ethanol and water and mix uniformly to obtain silica sol;

[0062] (2), impregnation treatment: adding a gelation catalyst to the sol obtained in step (1), stirring evenly to obtain a catalyzed silica sol, and dipping and gelling the quartz fiber felt in the catalyzed silica sol to obtain dioxide dioxide Silicon wet gel felt;

[0063] (3), encapsulation treatment: the surface of the silica wet gel felt obtained in step (2) is encapsulated with a water-based elastic coating, and the upper surface is reserved for no encapsulation, and the thickness of the encapsulation layer is 2 mm;

[0064] (4), aging treatment: the surface-encapsulated silica wet gel felt obtained in step (3) is subjected to 18h aging treatment at room temperature;

[0065] (5) Drying treatment: subjecting the aged silica wet gel felt ...

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Abstract

The invention belongs to the field of thermal insulation materials, and discloses a preparation method of an anti-dusting silicon dioxide aerogel felt, which comprises the following steps: packaging the surface of a silicon dioxide wet gel felt, and reserving one of the surfaces which is not packaged; spraying a water-based adhesive or a water-based elastic coating or a flame-retardant coating on the surface of the silicon dioxide wet gel felt, enhancing the binding force between aerogel and fibers on the surface of a fiber felt body before drying, then carrying out the drying process, finally, packaging the unpackaged surface, and obtaining the anti-dusting silicon dioxide aerogel felt. The packaging treatment is directly carried out before drying, the aerogel on the surface of the felt body is in a gel state during packaging, the phenomenon of powder falling is avoided, and the situation that aerogel powder falls off from the surface of the felt body when the aerogel felt is dried first and then packaged is well avoided.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, and in particular relates to a preparation method of a powder-drop-proof silica aerogel felt. Background technique [0002] At present, developing new energy, improving the utilization rate of existing energy and saving energy have attracted great attention from all countries. my country is an energy-poor country. Therefore, rational utilization of energy and energy conservation are of great significance to the sustainable development of our society. It is one of the most effective and economical measures to save energy by adopting new technology and new process to develop environment-friendly thermal insulation materials. [0003] SiO 2 As an emerging super thermal insulation material, aerogel has a very low thermal conductivity, far lower than the thermal conductivity of static air at room temperature of 0.25W / m·K. It has an unmatched thermal insulation effect and low density. , W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/18C04B26/16C04B26/04C04B111/27C04B111/28
CPCC04B26/18C04B26/16C04B26/04C04B2111/28C04B2111/27C04B14/064C04B14/42C04B22/126C04B14/4656C04B22/06C04B14/4631
Inventor 张继承董会娜潘广镇何凤霞张蔓蔓陈帅刘喜宗张东生
Owner GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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