Process for preparing glass fiber composite type silicon dioxide aerogel insulation quilt

A silicon dioxide and preparation process technology, applied in the field of chemical materials, can solve the problems of low aerogel strength, complex preparation process, large solvent consumption, etc., and achieve the effects of reducing thermal conductivity, simple process, and low solvent consumption

Inactive Publication Date: 2015-04-08
GUIZHOU AEROSPACE WUJIANG MACHINERY & ELECTRICITYEQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation process of glass fiber composite silica airgel thermal insulation blanket, so as to solve the complex preparation process, long preparation cycle and large solvent consumption faced by the industrialization of silica airgel thermal insulation materials , more waste liquid, low aerogel strength, high brittleness and other technical problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation process of the glass fiber composite silica airgel thermal insulation felt includes the following steps: preparation of silica gel liquid → forming of glass fiber felt airgel → aging → drying → detection. Prepare the silica airgel glue in the following volume ratio: tetraethyl orthosilicate: 99% industrial alcohol: water catalyst: additive = 10:60:2:0.1. The water catalysts are respectively 0.02mol / l hydrochloric acid solution and 0.01mol / l ammonia solution, the additive is ethyl cellulose, and the reaction time is 1h. Spray the reaction glue on a surface with a thickness of 10mm and a density of 165kg / m 3 On the glass fiber needle mat, make the glass fiber mat saturated to absorb the glue, the glass fiber mat has no bubbles or depressions, and the upper and lower surfaces are even and smooth, and then put it in an alkaline atmosphere at 38°C and let it stand for 20 minutes to form the glass fiber mat. Glue wet material. Soak the glass fiber airgel wet...

Embodiment 2

[0032] The preparation process of the glass fiber composite silica airgel thermal insulation blanket includes the following steps: preparation of silica gel solution → forming of glass fiber mat airgel → aging → surface modification → drying → detection. Prepare the silica airgel glue in the following volume ratio: ethyl orthosilicate: 99% industrial alcohol: water catalyst: additive = 10:100:5:0. The water catalysts are 0.02mol / l hydrochloric acid solution and 0.01mol / l ammonium carbonate solution respectively, and the reaction time is 1.5h. Spray the reaction solution on a layer with a thickness of 10mm and a density of 110kg / m 3 On the glass fiber needle felt, make the glass fiber felt saturated to absorb the glue, the glass fiber felt has no bubbles or depressions, and the upper and lower surfaces are even and smooth, and then put it in an alkaline atmosphere at 40°C and let it stand for 18 minutes to form the glass fiber felt. Glue wet material. Soak the glass fiber air...

Embodiment 3

[0035]The preparation process of the glass fiber composite silica airgel thermal insulation blanket includes the following steps: preparation of silica gel solution → forming of glass fiber mat airgel → aging → surface modification → drying → detection. Prepare the silica airgel glue in the following volume ratio: tetraethyl orthosilicate: 99% industrial alcohol: water catalyst: additive = 10:200:3:0.001. The water catalyst is pure water, 0.02mol / l ammonium bicarbonate, the additive is N,N-dimethylformamide, and the reaction time is 1h. Spray the reaction solution on a layer with a thickness of 10mm and a density of 110kg / m 3 On the glass fiber needle felt, make the glass fiber felt saturated to absorb the glue, the glass fiber felt has no bubbles or depressions, and the upper and lower surfaces are even and smooth, and then put it in an alkaline atmosphere at 45°C and let it stand for 25 minutes to form the glass fiber felt. Glue wet material. Soak the glass fiber airgel we...

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Abstract

The invention discloses a process for preparing a glass fiber composite type silicon dioxide aerogel insulation quilt. The process mainly comprises the following steps: absorbing a silicon dioxide aerogel liquid till being saturated by using a glass fiber quilt, gelling under specific conditions, and drying supercutical fluid CO2 to form a reinforced aerogel material. The glass fiber composite type silicon dioxide aerogel insulation quilt prepared by using the process is excellent in heat preservation property, mechanical property and fireproof and waterproof property, and is convenient to construct. By adopting the process, a solvent replacement step is avoided, the operation is simple and easy, the operation process is controllable, and continuous production can be achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a preparation process of a glass fiber composite silica airgel thermal insulation blanket. Background technique [0002] SiO 2 Airgel is a light nanoporous amorphous solid material with controllable structure, its porosity is as high as 80%-99.8%, the pore size is 1-100nm, and the high specific surface area is 200-1000 m 2 / g, low density change range 3~500kg / m 3 , The thermal conductivity at normal temperature and pressure is less than 0.013 W / mK, which is lower than that of still air (0.026 W / mK), and it is the solid material with the lowest thermal conductivity at present. [0003] At present, the main problems faced by the industrialization of silica airgel include: complex preparation process, long preparation cycle, large solvent consumption, large waste liquid, low airgel strength, high brittleness and other shortcomings, which limit the developmen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/02
Inventor 周蕊邓林田冠宇
Owner GUIZHOU AEROSPACE WUJIANG MACHINERY & ELECTRICITYEQUIP
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