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Fiber composite carbon aerogel material and preparation method thereof

A technology of fiber composite and carbon aerogel, which is applied in the preparation of high temperature resistant aerogel composite materials by using inorganic fiber materials composited with carbon aerogel, and in the field of airgel composite material preparation, which can solve the problem of inability to prepare 1000°C resistant The above high-temperature airgel insulation composite materials and other problems can achieve good mechanical strength and process performance, good high temperature resistance, and good formability.

Active Publication Date: 2010-04-28
海鹰空天材料研究院(苏州)有限责任公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical defects in the prior art, such as the inability to prepare airgel thermal insulation composite materials that can withstand high temperatures above 1000°C in a non-oxidizing atmosphere, the present invention provides the following technical solutions:

Method used

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  • Fiber composite carbon aerogel material and preparation method thereof
  • Fiber composite carbon aerogel material and preparation method thereof
  • Fiber composite carbon aerogel material and preparation method thereof

Examples

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preparation example Construction

[0061] (II) Preparation of fiber composite phenolic gel: use the phenolic solution to impregnate inorganic fiber material and heat to obtain fiber composite phenolic gel;

[0062] (III) Aging of the fiber-composite phenolic gel: soaking the fiber-composite phenolic gel in an organic solvent for aging.

[0063] The organic solvent used in step (III) can be selected from the organic solvent commonly used in gel aging, especially carbon airgel aging, for example, it can be selected from ethanol, propanol, acetone, methyl ethyl ketone, cyclohexane, tetrahydrofuran, One or a combination of two or more of the group consisting of isopropyl ether and toluene, preferably acetone.

[0064] (IV) Supercritical fluid drying: performing supercritical fluid drying on the aged fiber-composite phenolic gel to obtain a fiber-composite phenolic airgel material; and

[0065] (V) Reaction in an atmosphere cracking furnace: the fiber composite phenolic airgel material is reacted in an atmosphere c...

Embodiment 1

[0080] Prepare phenolic solution according to the following raw materials and ratios: Dissolve resorcinol, formaldehyde and sodium carbonate in deionized water according to the following mass ratio: sodium carbonate: resorcinol: formaldehyde: water=1:55:85:1000, stir After uniformity, the phenolic solution was obtained.

[0081] Add the phenolic solution to the container with a bulk density of 0.5g / cm 3 In the mold of the zirconia fiber cotton, the phenolic solution is completely immersed in the inorganic fiber material and mixed evenly, wherein the addition of the inorganic fiber material is to make the carbon element in the carbon airgel and the mass ratio of the inorganic fiber material (Table 1 (abbreviated as "carbon to fiber ratio") is 1:60 (in this paper, the carbon element in the carbon airgel is calculated as follows: in the determined phenol and aldehyde substances, the carbon element is calculated according to their molecular structure respectively. The element per...

Embodiment 2 to 13、 Embodiment 15 to 19 and Embodiment 21 to 48

[0085] Except for the contents shown in Table 1 and the appended notes in Table 1, the others were carried out in the same manner as in Example 1.

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Abstract

The invention provides a fiber composite carbon aerogel material which comprises carbon aerogel and an inorganic fiber material, wherein the mass ratio of the carbon element to the inorganic fiber material in the carbon aerogel is 1:1-300. The invention also provides a method for preparing the fiber composite carbon aerogel material, which comprises the following steps: preparation of phenolic aldehyde solution, preparation of fiber composite phenolic aldehyde gel, aging of the fiber composite phenolic aldehyde gel, drying of supercritical fluid, reaction in an atmosphere cracking furnace, and the like. The fiber composite carbon aerogel material has the advantages of favorable moldability, good high temperature resistance, outstanding high-temperature heat-insulating property, low density and high compressive resistance; and the fiber composite carbon aerogel material can conduct electricity, be used as a catalyst carrier material, electrode material or high-temperature heat-insulating material, meet the special requirements for aviation, spaceflight, military affairs and other aspects, and be used in the civil field having high requirements for high-temperature heat-insulating property.

Description

technical field [0001] The invention belongs to the technical field of material preparation technology, and relates to a method for preparing an airgel composite material, in particular to a method for preparing a high-temperature-resistant (≥1000°C) airgel composite material by using an inorganic fiber material composited with carbon aerogel . Background technique [0002] Airgel is a lightweight solid material with a nanoscale porous network structure. It has the characteristics of extremely low density, high specific surface area and high porosity. It has broad application prospects in adsorption, catalysis and impedance coupling, especially in It has obvious advantages in the field of thermal insulation materials and is called "super thermal insulation materials". Airgel materials include organic aerogels and inorganic aerogels (such as carbon aerogels), among which carbon aerogels have the best high temperature resistance. [0003] Due to the chemical composition char...

Claims

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Application Information

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IPC IPC(8): C04B30/02
CPCC04B30/02C04B2111/00853C04B2111/28C04B2111/94C04B2111/00982C04B2111/0081
Inventor 刘斌邹军锋詹万初张昊蒋兴荣管锦鑫
Owner 海鹰空天材料研究院(苏州)有限责任公司
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