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Aerogel composite material and preparation method thereof

A composite material and airgel technology, which is applied in the fields of heat preservation, light weight, fire prevention, shock absorption and energy absorption materials, sound insulation, and explosion protection, and can solve the problem that the macroscopic shape is easy to be destroyed, destroying the microscopic structure of airgel nanopores, and air condensation The problems such as poor flexural performance of glue can be solved, and the effect of excellent heat insulation and fire prevention performance and huge market prospect can be achieved.

Inactive Publication Date: 2019-07-09
卢锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, airgel is prone to the following problems during use: (1) Airgel has poor flexural performance, and its macroscopic shape is easily destroyed when it is used alone; (2) When airgel is in contact with a solvent, its nanoporous The structure is very prone to siphon phenomenon, which destroys the airgel nanoporous microstructure, resulting in the loss of its excellent properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] A preparation method of an airgel composite material, comprising the following steps:

[0042] (1) Preparation of heat-insulating inorganic adhesive, stirring and mixing the inorganic adhesive and the heat-insulating filler;

[0043] (2) Coating a layer of heat-insulating inorganic adhesive in step (1) on the surface of hydrophobic airgel particles or airgel particles with internal hydrophobic and surface hydrophilic structure characteristics;

[0044] (3) Before the heat-insulating inorganic adhesive in step (2) is cured, the airgel particles coated with the heat-insulating inorganic adhesive on the surface are casted and cured to obtain an airgel composite material.

[0045] In this way, the present invention can control the curing time of the heat-insulating inorganic adhesive by adjusting the viscosity of the heat-insulating inorganic adhesive, so that the inorganic heat-insulating adhesive is coated on the surface of the airgel, and then bonded to each other and cu...

Embodiment 1

[0052] Airgel composites were prepared using the following steps:

[0053] (1) Preparation of heat-insulating inorganic adhesive, mixing tobermolite powder, Portland cement, and water, the mass ratio of the three is 1:10:4.5, and set aside;

[0054] (2) Coat the heat-insulating inorganic adhesive in step (1) with SiO with a particle size of 5 mm, which is hydrophobic inside and hydrophilic on the surface. 2 On the surface of the airgel particles, the shape of the airgel particles is a regular tetrahedron;

[0055] (3) The airgel particles coated with heat-insulating inorganic adhesive in step (2) were mixed, poured and molded, and cured at room temperature for 2 days to obtain an airgel composite material. The performance indicators are shown in Table 1.

[0056] Table 1 Performance indicators of the airgel composite material of Example 1

[0057] Density (kg / m 3 )

Embodiment 2

[0059] Airgel composites were prepared using the following steps:

[0060] (1) Preparation of heat-insulating inorganic adhesive, stirring and mixing vitrified microbead powder and water glass, the mass ratio of the two is 1:9, and set aside;

[0061] (2) Coat the heat-insulating inorganic adhesive in step (1) with TiO with a particle size of 0.1 mm, which is internally hydrophobic and surface hydrophilic. 2 The surface of the airgel particle, the shape of the airgel particle is a regular hexahedron;

[0062] (3) Mix the airgel particles coated with heat-insulating inorganic adhesives in step (2), cast them into shape, cure at room temperature for 3 hours, and place them in a blast drying oven at 100°C for 2 hours to obtain airgel composite materials. The indicators are shown in Table 2.

[0063] The performance index of the airgel composite material of table 2 embodiment 2

[0064] Density (kg / m 3 )

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Abstract

The invention discloses an aerogel composite material and a preparation method thereof. The aerogel composite material is characterized in that the aerogel composite material is composed of aerogel particles and a heat insulation inorganic adhesive, the aerogel particles are hydrophobic aerogel particles or aerogel particles with internal hydrophobic and surface hydrophilic structure characteristics, and the heat insulation inorganic adhesive is composed of an inorganic adhesive and a heat insulation filler. The invention provides the preparation method of the aerogel composite material. The preparation method comprises the following steps: (1) coating the surfaces of aerogel particles with a heat-insulating inorganic adhesive; and (2) before the heat-insulating inorganic adhesive is cured, stacking the aerogel particles of which the surfaces are coated with the heat-insulating inorganic adhesive in the step (1), conducting pouring molding and curing, so as to obtain the aerogel composite material. The aerogel composite material provided by the invention has excellent thermal insulation and fireproof performance and ideal flexural and compressive strength, and also has sound insulation, damping and energy absorption characteristics; and the aerogel still retains an original nano-porous structure, so that the material can be applied to the fields of energy-saving buildings suchas building outer walls, inner walls and partition walls and the fields of aerospace, national defense military industry, transportation and the like, and has a huge market prospect.

Description

technical field [0001] The invention relates to a composite material, in particular to an airgel composite material, which belongs to the field of light weight, thermal insulation, fireproof, sound insulation, explosion-proof, shock-absorbing and energy-absorbing materials. Background technique [0002] Airgel is a light inorganic solid material with a three-dimensional network skeleton structure and nano-scale pores. It has extremely high porosity, specific surface area, extremely low density and solid content, chemical inertness and non-combustibility, and exhibits excellent It has the characteristics of heat insulation, fire prevention, sound insulation, shock absorption and energy absorption, and transparency. The thermal conductivity can be as low as 0.015W / m·K or less. It is the best heat insulation performance among all solid materials. It can be widely used in national defense and military industries. Military fields such as aerospace, security and anti-terrorism, as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/08C04B28/04C04B28/26C04B28/14B01J13/00
CPCC04B28/04C04B28/26C04B28/14B01J13/0091C04B2201/20C04B2201/32C04B2201/50C04B2111/28C04B2111/52C04B2111/40C04B14/043C04B38/08C04B14/24C04B14/365
Inventor 卢锋张丁日卢珊卢军
Owner 卢锋
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