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A kind of airgel thermal insulation composite material and preparation method thereof

A composite material and airgel technology, applied in the field of airgel thermal insulation composite materials and its preparation, can solve the problems of airgel particles falling out, human injury, and poor bending resistance of composite materials, etc., to achieve It is beneficial to surface hydrophobicity, enhances thermal insulation performance, and compensates for bending resistance

Active Publication Date: 2022-06-24
SHANGHAI GRAND SOUND BEYOND NOISE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the fiber-composite airgel has greatly improved the mechanical properties of the airgel, such as tensile strength and compressive strength, the bending resistance of the composite material itself is not good due to the splitting of the fibers, and the fiber-composite airgel is in the In actual use, airgel particles are easy to fall out and cause harm to the human body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Pre-impregnation of reinforcement: Dissolve RTV silicone rubber and curing agent in solvent toluene, prepare a dilute solution of 2ωt% RTV silicone rubber, and then make the density of 170Kg / m 3 The quartz needle punched fiber felt was immersed in a dilute solution of silicone rubber, and then taken out and dried at 80 °C to obtain a quartz needle punched fiber felt pre-impregnated with RTV silicone rubber;

[0039] (2) Preparation of precursor solution: methyltrimethoxysilane, urea and cetyltrimethylammonium chloride were dissolved in 5 mmol / L acetic acid, and the precursor solution was obtained after vigorous stirring for 0.5 h. , the mass ratio of urea, cetyltrimethylammonium chloride and dilute acetic acid is 10:30:2:40;

[0040] (3) Precursor solution impregnating elastic reinforcement: the fiber mat is flattened in the stainless steel mold, and the fiber mat is slowly impregnated with the above-mentioned precursor solution at normal temperature and pressure un...

Embodiment 2

[0045] (1) Pre-impregnation of reinforcement: Dissolve RTV silicone rubber and curing agent in solvent toluene, prepare a dilute solution of 2ωt% RTV silicone rubber, and then make the density of 170Kg / m 3 The quartz needle punched fiber felt was immersed in a dilute solution of silicone rubber, and then taken out and dried at 80 °C to obtain a quartz needle punched fiber felt pre-impregnated with RTV silicone rubber;

[0046] (2) Preparation of precursor solution: dissolve methyltrimethoxysilane, dimethyldimethoxysilane, urea and cetyltrimethylammonium chloride in 5mmol / L acetic acid, and stir vigorously for 0.5h Then, a precursor solution is obtained, wherein the mass ratio of organosilicon, urea, cetyltrimethylammonium chloride and dilute acetic acid is 10:30:2:40, methyltrimethoxysilane and dimethyldimethoxysilane are The molar ratio of base silane is 4.2:0.8;

[0047] (3) Precursor solution impregnating elastic reinforcement: the fiber mat is flattened in the stainless s...

Embodiment 3

[0052] (1) Pre-impregnation of reinforcement: Dissolve RTV silicone rubber and curing agent in solvent toluene, prepare a dilute solution of 2ωt% RTV silicone rubber, and then make the density of 170Kg / m 3 The quartz needle punched fiber felt was immersed in a dilute solution of silicone rubber, and then taken out and dried at 80 °C to obtain a quartz needle punched fiber felt pre-impregnated with RTV silicone rubber;

[0053] (2) Preparation of precursor solution: dissolve methyltrimethoxysilane, dimethyldimethoxysilane, urea and cetyltrimethylammonium chloride in 5mmol / L acetic acid, and stir vigorously for 0.5h Then, a precursor solution is obtained, wherein the mass ratio of organosilicon, urea, cetyltrimethylammonium chloride and dilute acetic acid is 10:30:2:40, methyltrimethoxysilane and dimethyldimethoxysilane are The molar ratio of base silane is 3.8:1.2;

[0054] (3) Precursor solution impregnating elastic reinforcement: the fiber mat is flattened in the stainless s...

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Abstract

The invention relates to an airgel thermal insulation composite material and a preparation method thereof. The composite material comprises the following components in parts by mass: 10-40 parts of reinforcing body, 1-2 parts of elastic body, and 5-35 parts of heat insulating body; (1) Pre-impregnation of the reinforcement; (2) Preparing the precursor solution; (3) Impregnating the elastic reinforcement with the precursor solution; (4) Sol-gel reaction; (5) Finally obtained after washing and drying. Compared with the prior art, the invention has the advantages of good thermal insulation performance, good bending resistance, good hydrophobicity and the like.

Description

technical field [0001] The invention relates to a thermal insulation composite material, in particular to an aerogel thermal insulation composite material and a preparation method thereof. Background technique [0002] Aerogel is a highly dispersed solid material composed of nanoporous skeleton and filled with gaseous dispersion medium in the pores. It has the characteristics of high porosity, high specific surface area, low density and low thermal conductivity. It can be widely used in Thermal insulation engineering, particle detector, high-speed particle collection, catalyst and catalyst carrier, etc. Aerogel is a typical super insulating material. However, pure aerogel materials have extremely low modulus and extremely brittle mechanical properties, making it difficult to achieve industrial applications. The composite design scheme of aerogel as a functional substrate has been recognized worldwide, which solves the problems of poor mechanical properties and extremely fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L83/07C08L9/02C08L9/06C08K9/10C08K7/10C08J5/06
CPCC08J5/06C08J2383/04C08J2409/02C08J2409/06
Inventor 王志平王恺中刘鸣王雷周重威杨勇吴宇
Owner SHANGHAI GRAND SOUND BEYOND NOISE NEW MATERIAL