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Anisotropic layered inorganic fiber aerogel material and preparation method thereof

An anisotropic layer and inorganic fiber technology, applied in the field of materials, can solve problems such as brittleness that limits practical applications

Active Publication Date: 2019-08-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional inorganic airgel materials are generally prepared from inorganic oxides, such as silica nanoparticles, alumina nanocrystals, boron nitride nanosheets, etc. The inherent brittleness of inorganic materials greatly limits their practical applications. application

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  • Anisotropic layered inorganic fiber aerogel material and preparation method thereof
  • Anisotropic layered inorganic fiber aerogel material and preparation method thereof
  • Anisotropic layered inorganic fiber aerogel material and preparation method thereof

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preparation example Construction

[0025] In one aspect of the present invention, the present invention provides a preparation method of anisotropic layered inorganic fiber airgel material (hereinafter referred to as inorganic fiber airgel material). According to an embodiment of the present invention, refer to figure 1 , the preparation method of the anisotropic layered inorganic fiber airgel material comprises:

[0026] S100: Mix the polymer solution, the inorganic precursor and the chloride to obtain a spinning precursor mixed solution. In this process, the inorganic precursor is hydrolyzed to obtain an inorganic oxide, so that the inorganic fiber airgel material can be obtained subsequently.

[0027] According to an embodiment of the present invention, the polymer solution includes a polymer material and a solvent, wherein the mass ratio of the polymer material to the solvent is (2-30):100, such as 2:100, 5:100, 8:100, 10 :100, 15:100, 20:100, 25:100, 30:100. Thus, a uniformly dissolved polymer solution ...

Embodiment 1

[0048] A preparation method of anisotropic layered inorganic fiber airgel material adopts the following process steps:

[0049] (1) Polymer solution preparation: add 20g of polyvinyl alcohol to 100g of deionized water, stir and dissolve at 90°C at a speed of 800rpm for 1 hour, and obtain a polyvinyl alcohol solution with a mass ratio of polymer material to solvent of 20:100 ;

[0050] (2) Spinning precursor mixed solution preparation: 50g zirconium oxychloride, 0.2g hydrochloric acid, 40g ferric chloride are added in above-mentioned polyvinyl alcohol solution, obtain the spinning precursor mixed solution with certain viscosity by stirring;

[0051] (3) Jet spinning: The jet spinning technology is used to spray the spinning precursor mixture at a speed of 5mL / h from the spinneret with compressed air with a flow rate of 5m / s, and the obtained fibers are deposited at a distance from the spinneret. On the 60cm metal mesh receiver, the composite fiber airgel is obtained;

[0052]...

Embodiment 2

[0055] A preparation method of anisotropic layered inorganic fiber airgel material adopts the following process steps:

[0056] (1) Polymer solution preparation: Add 5g of polyethylene oxide to 100g of deionized water, stir and dissolve at 60°C at a speed of 800rpm for 1 hour, and obtain a polyethylene oxide solution with a mass ratio of polymer material to solvent of 5:100 ;

[0057] (2) Preparation of spinning precursor mixed solution: add 40g tetraethyl orthosilicate, 0.2g phosphoric acid, and 30g manganese chloride to the above-mentioned polyethylene oxide solution, and obtain a spinning precursor mixed solution with a certain viscosity by stirring;

[0058] (3) Jet spinning: the spinning precursor mixture is ejected from the spinneret at a speed of 5mL / h with compressed air with a flow rate of 3m / s by jet spinning technology, and the obtained fibers are deposited on the distance from the spinneret. On the 60cm metal mesh receiver, the composite fiber airgel is obtained; ...

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Abstract

The invention provides an anisotropic layered inorganic fiber aerogel material and a preparation method thereof. The preparation method of the anisotropic layered inorganic fiber aerogel material comprises the steps that a polymer solution, an inorganic precursor and a chloride are mixed to obtain a spinning precursor mixed liquid; the spinning precursor mixed liquid is subjected to jet spinning to obtain composite fiber aerogel; the composite fiber aerogel is calcined to obtain the anisotropic layered inorganic fiber aerogel material. In this way, the preparation method is simple, easy to operate, low in preparation cost and high in efficiency and facilitates industrial production. The inorganic fiber aerogel material prepared by using the method is composed of multiple layers of stackedmicro-fibers, has an anisotropic layered structure, and can be cut into any required shapes and stacked into required thicknesses; the inorganic fiber aerogel material is high in flexibility and compressibility, excellent in fire resistance and high in high- and low-temperature resistance and thermal insulation performance, and the application field of the anisotropic layered inorganic fiber aerogel material is greatly expanded.

Description

technical field [0001] The invention relates to the field of material technology, in particular to an anisotropic layered inorganic fiber airgel material and a preparation method thereof. Background technique [0002] In recent years, airgel materials with a porous three-dimensional network structure, including carbon nanotube aerogels, biomass-derived aerogels, graphene aerogels, inorganic nanofiber aerogels, and carbon fiber aerogels, have High compressibility and large strain resilience have attracted more and more attention. Moreover, inorganic airgel materials have the advantages of light weight, large specific surface area, low thermal conductivity, good chemical stability and thermal stability, etc. Therefore, inorganic airgel materials have been widely used in various fields, including Thermal insulation, water treatment, catalyst carrier, energy absorption, high temperature air filtration, etc. However, traditional inorganic airgel materials are generally prepared...

Claims

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Application Information

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IPC IPC(8): B01J13/00
CPCB01J13/0091C01B33/26C01B33/20D01D1/02D01D5/14D01F9/08D01D10/02C04B35/62227C04B35/486C04B35/624C04B35/6225C04B2235/77C04B35/634C04B35/63416C04B35/63444C04B35/63488C04B35/6365C04B35/14C04B38/009C04B14/302C04B2111/0081C01G25/006C01G49/0018C01P2004/20C01P2006/11C01P2006/32
Inventor 伍晖贾超
Owner TSINGHUA UNIV