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Three-dimensional porous frame-reinforced fiber aerogel material and preparation method thereof

A three-dimensional porous, fiber-reinforced technology, used in aerogel preparation, chemical instruments and methods, colloid chemistry, etc., can solve problems such as limitations, achieve less raw material limitations, good flexibility and connectivity, good mechanical strength and recovery. The effect of elastic energy

Inactive Publication Date: 2017-07-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with sol-gel technology, this method has simple process and wide selection of raw materials. The prepared airgel material has a full-fiber structure, but the mechanical strength of the material is only determined by the bonding points formed by the interpenetrating fibers. Provided, the tensile strength and shear strength of the material are still relatively insufficient, so that it is limited in the actual application environment

Method used

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  • Three-dimensional porous frame-reinforced fiber aerogel material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] like figure 1 As shown, a three-dimensional porous frame-reinforced fiber airgel material, which contains a three-dimensional porous frame 1 and fibers 2, the three-dimensional porous frame 1 is used as the main support reinforcement structure, by placing the three-dimensional porous frame in the fiber dispersion slurry, and forming -Solvent drying-curing treatment obtained.

[0038] The specific steps of the preparation method of the described three-dimensional porous frame reinforced fiber airgel material include:

[0039] Step 1: Disperse 10 g of cotton fiber raw materials with an average diameter of 20 μm and an average aspect ratio of 40,000 in 500 g of pure water to prepare a uniform fiber dispersion slurry.

[0040] The second step: using conventional three-dimensional weaving technology to obtain a bulk density of 300mg / cm 3 , the mesh size is 15mm, the three-dimensional porous cotton fabric of 20g rectangular parallelepiped shape that mechanical strength is 1...

Embodiment 2

[0045] like figure 1 As shown, a three-dimensional porous frame-reinforced fiber airgel material, which contains a three-dimensional porous frame 1 and fibers 2, the three-dimensional porous frame 1 is used as the main support reinforcement structure, by placing the three-dimensional porous frame in the fiber dispersion slurry, and forming -Solvent drying-curing treatment obtained.

[0046] The specific steps of the preparation method of the described three-dimensional porous frame reinforced fiber airgel material include:

[0047] Step 1: Disperse 5 g of silk fiber raw materials with an average diameter of 15 μm and an average aspect ratio of 30,000 in 400 g of pure water to prepare a uniform fiber dispersion slurry.

[0048] The second step: using conventional three-dimensional weaving technology to obtain a bulk density of 280mg / cm 3 , the mesh size is 10mm, and the three-dimensional porous silk fabric of 60g cube shape that mechanical strength is 15kPa is immersed in 405...

Embodiment 3

[0052] like figure 1 As shown, a three-dimensional porous frame-reinforced fiber airgel material, which contains a three-dimensional porous frame 1 and fibers 2, the three-dimensional porous frame 1 is used as the main support reinforcement structure, by placing the three-dimensional porous frame in the fiber dispersion slurry, and forming -Solvent drying-curing treatment obtained.

[0053] The specific steps of the preparation method of the described three-dimensional porous frame reinforced fiber airgel material include:

[0054] Step 1: Disperse 3.6 g of polyimide fiber raw materials with an average diameter of 10 μm and an average aspect ratio of 50,000 in a mixed solvent of 200 g of water and 200 g of isopropanol to prepare a uniform fiber dispersion slurry.

[0055] The second step: using conventional foam molding technology to prepare a bulk density of 60mg / cm 3 , with a mesh size of 3mm and a mechanical strength of 25kPa, 20g of cube-shaped three-dimensional porous p...

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Abstract

The invention provides a three-dimensional porous frame-reinforced fiber aerogel material and a preparation method thereof. The three-dimensional porous frame-reinforced fiber aerogel material is characterized by comprising a three-dimensional porous frame as a main body support-reinforced structure; and the three-dimensional porous frame-reinforced fiber aerogel material is obtained through putting the three-dimensional porous frame into fiber dispersing slurry and carrying out slurry molding, solvent drying and solidification treatment. The volume density of the obtained three-dimensional porous frame-reinforced fiber aerogel material is 10-1000mg / cm<3>, the mean pore size is 0.05-1000 microns and the tensile strength is 20-50kPa. The internal structure of the obtained aerogel material is that fibers are uniformly dispersed into meshes of the three-dimensional frame and the fibers are interlaced with each other and run through to form holes, so that the three-dimensional porous frame-reinforced fiber aerogel material is endowed with a high porosity and small-pore size structure while the mechanical strength of the aerogel material is improved, and the three-dimensional porous frame-reinforced fiber aerogel material has wide application prospects in the fields such as thermal insulation, heat preservation, sound absorption and noise reduction.

Description

Technical field [0001] The invention relates to the technical field of new materials, and in particular to a three-dimensional porous framework reinforced fiber airgel material and a preparation method thereof. Background technique [0002] Aerogel is a porous and highly dispersed solid material that uses gas to replace the liquid in a wet gel while keeping the three-dimensional network structure of the gel basically unchanged. It is one of the smallest solid materials known to have the density currently. Airgel materials have the advantages of low density, high specific surface area, high porosity, low thermal conductivity, strong adsorption / catalytic ability, and good sound absorption and heat insulation properties. They are widely used in energy, information, environmental protection, medicine, pesticides, metallurgy, catalysis, and Basic scientific research and other fields have broad application prospects. [0003] The current main preparation method of airgel material...

Claims

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Application Information

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IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 丁彬曹雷涛吴红炎葛建龙印霞孙刚俞建勇
Owner DONGHUA UNIV
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