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A kind of preparation method of silica airgel composite board

A technology of silica and aerogel, applied in the direction of silica, silica, mechanical equipment, etc., can solve the problems of expensive equipment, high energy consumption of supercritical drying process, complicated process, etc., and achieve the effect of simple production method

Active Publication Date: 2020-08-11
中科高新材料(南通)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this is that the process is complicated and the cost is high, and the supercritical drying method is basically used on the market. The supercritical drying process consumes high energy, is dangerous, and the equipment is expensive and complicated, making it difficult to carry out continuous and large-scale production.

Method used

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  • A kind of preparation method of silica airgel composite board
  • A kind of preparation method of silica airgel composite board
  • A kind of preparation method of silica airgel composite board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Stir 0.8kg of de-n-butanol and 5g of methyltrimethoxysilane at a speed of 300 rpm for 30 minutes and mix them evenly to form a mixed solution;

[0034] (2) Add 0.15 kg of silica aerogel particles to the above-mentioned mixed solution, stir for 2 hours at a speed of 300 rpm, and mix uniformly to form a suspension;

[0035] (3) Add 0.05 kg of water glass to the above suspension, stir at 200 rpm for 20 minutes, mix evenly, and form a silica aerogel slurry. The particle size distribution of the slurry is mainly about 1000 nm, see image 3 Medium emulsion 2;

[0036] (4) The silica aerogel slurry is evenly coated on both sides of the glass fiber board, and dried at a temperature of 110° C. for 24 hours to prepare a silica aerogel composite board. The thermal conductivity of the obtained aerogel composite board is 0.02249W / (m*k), as shown in Table 1.

Embodiment 2

[0038] (1) Stir 1kg of demethanol and 5g of methyltrimethoxysilane at a speed of 300 rpm for 30 minutes and mix them evenly to form a mixed solution;

[0039] (2) Add 0.2kg of silica aerogel powder to the above-mentioned mixed solution, stir for 3 hours at a speed of 300 rpm, and mix evenly to form a suspension;

[0040] (3) Add 0.05kg of water glass to the above suspension, stir at 300 rpm for 30 minutes, mix uniformly, and form a silica aerogel slurry. The particle size distribution of the slurry is mainly about 800 nm, see image 3 Medium emulsion 1;

[0041] (4) The silica aerogel slurry is uniformly coated on both sides of the glass fiber board and dried at a temperature of 90° C. for 24 hours to prepare a silica aerogel composite board. The thermal conductivity of the obtained aerogel composite board is 0.02942 W / (m*k).

Embodiment 3

[0043] (1) Stir 1kg of de-n-butanol and 3g of tetraethoxysilane at a speed of 300 rpm for 30 minutes and mix them evenly to form a mixed liquid;

[0044] (2) Add 0.2kg of silica aerogel particles to the above-mentioned mixed solution, stir for 1 hour at a speed of 300 rpm and mix uniformly to form a suspension;

[0045] (3) Add 0.05 kg of water glass to the above suspension, stir at 300 rpm for 30 minutes, mix uniformly to form a silica aerogel slurry, the particle size distribution of the slurry is mainly about 1300 nm, see image 3 Medium emulsion 3;

[0046] (4) The silica aerogel slurry is uniformly coated on both sides of the glass fiber board, and dried at a temperature of 100° C. for 24 hours to prepare a silica aerogel composite board. The thermal conductivity of the obtained aerogel composite board is 0.03656W / (m*k).

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Abstract

The invention discloses a preparation method of a silica aerogel composite plate. Silica aerogel powder and / or particles are mixed with a solvent, a surfactant and a binder, to prepare a slurry, and the slurry is coated on a base material to prepare a composite plate. The requirement on heat preservation is met, and the preparation method is simple, rapid and can be industrialized on a large scale.

Description

Technical field [0001] The invention belongs to the technical field of fireproof and heat insulation materials, and relates to a method for preparing a silica aerogel composite board. Background technique [0002] Silica aerogel is the product of drying the solvent in the colloid while maintaining the integrity of the colloidal structure. It has an ultra-low density (0.003~0.29g / cm 3 ), ultra-high porosity (80-99.8%) and ultra-fine structure (microscopic network framework and voids generally enter the nano range, and the specific surface area can reach 800m 2 / g above), which brings a series of excellent performances in heat, light, electricity, sound and adsorption, and has broad application prospects in the fields of thermal insulation, photoelectricity, dielectric, acoustic resistance and sound insulation, adsorption, catalysis, etc. The nanoporous structure of silica aerogel can effectively inhibit solid heat conduction and gas heat transfer, and is currently recognized as a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L59/02C01B33/16
CPCC01B33/16F16L59/028
Inventor 吕茂天潘徐伟周培宗恺金光虎
Owner 中科高新材料(南通)有限责任公司