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Preparation method of aerogel organic glass

A plexiglass and aerogel technology, applied in the field of aerogel glass preparation, can solve the problems of insufficient heat resistance and toughness, limited application scope, etc., and achieve the effects of improving sound absorption, prolonging aging time, and uniform material.

Active Publication Date: 2020-07-28
中化学华陆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its application range is limited due to deficiencies in heat resistance and toughness, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 of the present invention provides a kind of preparation method of airgel plexiglass, comprises the following steps:

[0024] (1) Take raw material airgel powder 100g and methyl methacrylate matrix 5kg by weight; Wherein, airgel powder is silicon airgel powder through hydrophobic treatment, the particle size of airgel powder It is a 600-mesh uniform powder; the methyl methacrylate matrix includes 90.1% methyl methacrylate, 0.2% benzoyl peroxide, 9% dibutyl phthalate, 0.7% hard Fatty acid;

[0025] (2) Add the prepared methyl methacrylate matrix into a reaction kettle equipped with a jacket, agitator and feeding port and stir to convert it into a prepolymer, wherein the temperature of the jacket is set to 80°C, and the stirring time is 35min , so that the conversion rate of the prepolymer reaches 25%;

[0026] (3) Add the weighed airgel powder to the prepolymer with a conversion rate of 25% after drying, grinding, and sieving, continue to stir and mix evenl...

Embodiment 2

[0030] Embodiment 2 of the present invention provides a kind of preparation method of airgel plexiglass, comprises the following steps:

[0031] (1) Take raw material airgel powder 500g and methyl methacrylate matrix 5kg by weight; Wherein, airgel powder is silicon airgel powder through hydrophobic treatment, the particle size of airgel powder It is a 600-mesh uniform powder; the methyl methacrylate matrix includes 93% methyl methacrylate, 0.1% azobisisobutyronitrile, 6.4% dioctyl ester, and 0.5% silicone oil according to the weight fraction;

[0032] (2) Add the prepared methyl methacrylate matrix into a reaction kettle equipped with a jacket, agitator and a feeding port and stir to convert it into a prepolymer, wherein the jacket temperature is set to 85°C, and the stirring time is 30min , so that the conversion rate of the prepolymer reaches 25%;

[0033] (3) Add the weighed airgel powder to the prepolymer with a conversion rate of 25% after drying, grinding, and sieving, ...

Embodiment 3

[0037] Embodiment 3 of the present invention provides a kind of preparation method of airgel plexiglass, comprises the following steps:

[0038] (1) Take raw material airgel powder 800g and methyl methacrylate matrix 5kg by weight; Wherein, airgel powder is silicon airgel powder through hydrophobic treatment, the particle size of airgel powder It is a uniform powder of 1000 meshes; the methyl methacrylate base comprises 94.7% methyl methacrylate, 0.06% diisopropyl peroxycarbonate, 4.89% dibutyl sebacate, 0.35% silicone oil;

[0039] (2) Add the prepared methyl methacrylate matrix into a reaction kettle equipped with a jacket, agitator and feeding port and stir to convert it into a prepolymer, wherein the temperature of the jacket is set at 85°C, and the stirring time is 40min , so that the conversion rate of the prepolymer reaches 30%;

[0040] (3) Add the weighed airgel powder to the prepolymer with a conversion rate of 30% after drying, grinding, and sieving, continue to s...

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Abstract

The invention discloses a preparation method of aerogel glass. The preparation method comprises the following steps: weighing raw materials including aerogel powder and a methyl methacrylate matrix according to weight, adding the prepared methyl methacrylate matrix into a reaction kettle, stirring to convert the methyl methacrylate matrix into a prepolymer, so that the conversion rate of the prepolymer reaches 25-35%, adding the weighed aerogel powder into the prepolymer with the conversion rate of 25-35%, continuously stirring and uniformly mixing to form a mixed prepolymer, enabling the conversion rate of the mixed prepolymer to reach 50%, filtering the mixed prepolymer, then adding the filtered mixed prepolymer into a mold, and carrying out vibration exhausting, promoting final polymerization until the mixed prepolymer in the mold is in a gel state, and continuously heating and keeping the temperature, so that the mixed prepolymer in the gel state forms formed aerogel organic glass.According to the preparation method, aerogel particles of various specifications are uniformly mixed with the organic glass prepolymer, so that the aerogel organic glass which is low in heat conductivity coefficient, high in mechanical strength, good in sound absorption and noise reduction effect and convenient to mount and use is obtained.

Description

technical field [0001] The invention relates to the technical field of glass preparation, in particular to a method for preparing airgel glass. Background technique [0002] Airgel is a lightweight nanoporous amorphous solid material formed by clustering primary particles with a diameter of about 3-8nm. It has a low density and a vacuum thermal conductivity of 0.001W / m·K, which is very Good insulation. Among them, the variable range of acoustic impedance of silica airgel powder is about 103-107kg / m2 S, the average sound absorption coefficient is greater than 0.8 in the frequency range of 125-4000Hz, and the sound absorption performance does not change after spraying water and dust. , has excellent sound-absorbing properties. Because the porosity of airgel is as high as 98% and the specific surface area is 1000m2 / g, it is the solid with the smallest density in the world, and it is also a highly brittle solid. The high brittle application of airgel products has to be combine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/14C08K7/26C08L33/12
CPCC08F120/14C08K7/26C08K2201/005C08L33/12
Inventor 周蕊康程赵耀耀杨志国郭卫疆
Owner 中化学华陆新材料有限公司
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