a compound sio 2 Airgel thermal insulation felt pad and preparation method thereof

A technology of aerogel and thermal insulation felt, applied in the field of materials, can solve the problems of long production cycle, low flexibility, easy powder drop, etc., and achieve the effect of reducing thermal conductivity, low thermal conductivity, and no powder drop

Active Publication Date: 2017-02-01
纳诚(邢台)新材料科技有限公司
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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 overcome the deficiencies in the prior art, to provide a SiO-based 2 Heat insulation felt made of airgel material, which solves the problems of low flexibility, easy to drop powder and long production cycle of traditional airgel felt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] SiO 2 Airgel powder, ceramic fiber, urea-formaldehyde, ammonium perchlorate and polyether polyol according to 70:20:10: 1×10 -4 : The ratio of 0.6 is stirred into a uniform slurry at room temperature; then the slurry is poured into a mold covered with non-woven fabric, and it is smoothed to control its thickness to 5mm, and then the non-woven fabric is spread on the slurry cloth, flattened until wrinkle-free. Send the mold into the self-made molding equipment for hot pressing treatment. The temperature of the treatment is 150°C, the pressure is 3MPa, and the time is 90min. After cooling, a hexagonal honeycomb structure is sewed on the gel felt pad to obtain SiO 2 Airgel felt mat with an areal density of 1.15kg / m 2 , The thermal conductivity is 23.1mW / m K.

Embodiment 2

[0042] SiO 2 Airgel powder, carbon fiber, polyurethane, triethanolamine and polyether polyol according to 70:20:10: 1×10 -3 : The ratio of 0.1 is stirred into a uniform slurry at room temperature; then the slurry is poured into a mold covered with non-woven fabric, and it is smoothed to control its thickness to 10mm, and then spread on the slurry without Spin the fabric and flatten it until there are no wrinkles; then send the above mold into the self-made molding equipment for heat and pressure treatment. The temperature of the treatment is 60°C, the pressure is 6MPa, and the time is 20min. After cooling, put it on the gel felt pad SiO can be obtained by sewing a hexagonal honeycomb structure 2 Airgel felt mat with an areal density of 1.08kg / m 2 , The thermal conductivity is 21.6mW / m K.

Embodiment 3

[0044] SiO 2 Airgel powder, carbon fiber, polyurethane, melamine and polyether polyol according to 80:10:10: 3×10 -2 : The ratio of 0.2 is stirred into a uniform slurry at room temperature; then the slurry is poured into a mold covered with a fiber cloth made of glass fiber, and it is smoothed to control its thickness to 8mm, and then the slurry Spread the non-woven fabric flat on the top, and flatten it until there are no wrinkles; then send the above mold into the self-made molding equipment for heating and pressurization treatment, the treatment temperature is 50°C, the pressure is 8MPa, and the time is 30min. Sew a hexagonal honeycomb structure on a gel felt pad to obtain SiO 2 Airgel felt mat with an areal density of 1.01kg / m 2 , the thermal conductivity is 19.7mW / m K.

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PUM

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Abstract

The invention discloses a composite SiO2 aerogel heat-insulation felt pad and its preparation method. The felt pad is composed of, by weight, 60-80 parts of a SiO2 aerogel material, 10-25 parts of a fibrous material, 10-15 parts of water or a bonding resin material, 1*10<-4>-4 parts of a catalyst and 1*10<-2>-2 parts of a structure control agent. The felt pad has high flexibility and strength and low thermal conductivity, and never looks powdery. According to the preparation method of the felt pad, molding of the aerogel felt pad or sheet material is realized through a hot compression molding process on the precondition of keeping properties of SiO2 aerogel unchanged. By the preparation method, preparation time is shortened, and production efficiency is greatly raised.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a SiO-based 2 Heat insulation felt pad of airgel material and preparation method thereof. Background technique [0002] Airgel is a porous amorphous solid material composed of nano-scale colloidal particles or polymer molecules. It is currently the artificial synthetic material with the lowest macro density. It has a unique three-dimensional open porous structure (1~100nm) and extremely high Porosity (80~99.8%) and surface area (200~2000m 2 / g), is a nanomaterial with a macroscopic three-dimensional overall structure. These unique properties endow airgel materials with strong adsorption performance, catalytic ability, extremely low thermal conductivity and extremely low refractive index, which makes aerogels widely used in many industrial fields, especially high-performance heat exchangers. The field of protection has a special purpose. [0003] Airgel is usually prepared by sol-gel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/16C04B26/10C04B26/12C04B14/06C04B14/38C04B16/06
Inventor 岳晓华
Owner 纳诚(邢台)新材料科技有限公司
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