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A kind of anisotropic layered carbon fiber-based airgel material and preparation method thereof

An anisotropic layer and airgel technology, applied in the field of materials, can solve problems such as poor compression resistance and difficulties in three-dimensional airgel

Active Publication Date: 2020-06-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the direct spinning deposition, the fiber materials obtained by electrospinning are usually piled randomly into the form of non-woven fabrics. Although fiber-based airgel materials can be prepared by rationally designing the receiving device, real three-dimensional airgel materials with regular shapes can be obtained. gel is still difficult
In addition, the airgel obtained by direct electrospinning has a disordered structure and thus poor compression resistance.

Method used

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  • A kind of anisotropic layered carbon fiber-based airgel material and preparation method thereof
  • A kind of anisotropic layered carbon fiber-based airgel material and preparation method thereof

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preparation example Construction

[0021] In one aspect of the present invention, the present invention provides a method for preparing an anisotropic layered carbon fiber-based airgel material (hereinafter referred to as carbon fiber-based airgel material). According to an embodiment of the present invention, refer to figure 1 , the preparation method of the anisotropic layered carbon fiber-based airgel material comprises:

[0022] S100: Mix the polymer solution, the inorganic precursor and the chloride to obtain a spinning precursor mixed solution. In this process, the inorganic precursors are hydrolyzed to obtain inorganic oxides, so that carbon fiber-based airgel materials can be obtained subsequently.

[0023] 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 polyme...

Embodiment 1

[0043] A method for preparing an anisotropic layered carbon fiber-based airgel material, using the following process steps:

[0044] (1) Preparation of polymer solution: Add 15g of polyvinyl butyral to 100g of deionized water, stir and dissolve at 90°C at a speed of 800rpm for 1h, and obtain a polymer with a mass ratio of polymer material to solvent of 15:100. Vinyl butyral solution;

[0045] (2) Preparation of spinning precursor mixed solution: add 35g of zirconium oxychloride, 0.2g of nitric acid, and 40g of ferric chloride to the above-mentioned polyvinyl butyral solution, and mix the spinning precursor with a certain viscosity by stirring liquid;

[0046] (3) Jet spinning: The jet spinning technology uses compressed air with a flow rate of 5m / s to spray the spinning precursor mixture at a speed of 5mL / h from the spinneret, and the fibers obtained are deposited at a distance from the spinneret. On the 60cm metal mesh receiver, the composite fiber airgel is obtained;

[0...

Embodiment 2

[0050] A method for preparing an anisotropic layered carbon fiber-based airgel material, using the following process steps:

[0051] (1) Polymer solution preparation: Add 5g of polyethylene oxide to 100g of deionized water, stir and dissolve at 90°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 ;

[0052] (2) Preparation of the spinning precursor mixed solution: 50g of zirconium acetate, 0.1g of phosphoric acid, and 40g of magnesium chloride were added to the above-mentioned polyethylene oxide solution, and the spinning precursor mixed solution with a certain viscosity was obtained by stirring;

[0053] (3) Jet spinning: The jet spinning technology uses compressed air with a flow rate of 5m / s to spray the spinning precursor mixture at a speed of 5mL / h from the spinneret, and the fibers obtained are deposited at a distance from the spinneret. On the 60cm metal mesh receiver, the composite fib...

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Abstract

The invention provides an anisotropic layered carbon fiber-based airgel material and a preparation method thereof. The preparation method of the anisotropic layered carbon fiber-based airgel material comprises: mixing a polymer solution, an inorganic precursor and a chloride to obtain a spinning precursor mixed solution; jet spinning the spinning precursor mixed solution to obtain Composite fiber airgel: the composite fiber airgel is pre-oxidized and carbonized sequentially to obtain anisotropic layered carbon fiber-based airgel material. Therefore, the above-mentioned preparation method is simple, easy to operate, low in preparation cost, high in efficiency, and easy for industrial production; the carbon fiber-based airgel material prepared by the above-mentioned method is composed of multi-layer stacked microfibers, and has an anisotropic layered structure , can be cut into any desired shape, and stacked into the desired thickness; and has good flexibility, compressibility and conductivity.

Description

technical field [0001] The invention relates to the field of material technology, in particular to an anisotropic layered carbon fiber-based airgel material and a preparation method thereof. Background technique [0002] Airgel material is an ultra-light material with a three-dimensional network structure. Because of its ultra-low density, high specific surface area and porosity, and low thermal conductivity, it is widely used in heat insulation, sound absorption and noise reduction. , catalyst carrier, air filtration and other fields have shown broad application prospects. Among them, in addition to the advantages of general airgel materials, carbon airgel materials also have the advantages of wide source of raw materials and high electrical conductivity, so they have broad market prospects in the fields of energy storage, sensors, and electromagnetic shielding. At present, the preparation of fiber materials mainly adopts electrospinning method. Due to the direct spinning...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/21D01F9/24
CPCD01F9/21D01F9/24
Inventor 伍晖贾超
Owner TSINGHUA UNIV