Preparation method of glass wool-aluminum silicon aerogel composite heat preservation plate
A technology of composite heat preservation and glass wool, applied in the direction of silicate, alkali metal silicate, etc., can solve the problems of complex gel process, complex preparation process, and high production cost, and achieve the avoidance of complex process, low equipment requirements, Integrity and improved mechanical properties
Pending Publication Date: 2016-07-20
ZHUO DA NEW MATERIAL TECH GRP
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Problems solved by technology
Therefore, the production cost of raw materials for the traditional preparation of alumina airgel is expensive, and the gel process is complicated; if tetraethyl silicate is used for the preparation of traditional alumina airgel, the gel sol process also needs to undergo hydrolysis and polycondensation of raw materials. The preparation process is more complicated
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[0033] The following will be further described in detail in conjunction with specific embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0034] The process of preparing silicon-aluminum composite airgel by inorganic salt method:
[0035] First configure a sodium metaaluminate solution with a certain mass concentration and stir until the sodium metaaluminate is completely hydrolyzed; then, dilute the water glass to meet the requirements of the process ratio; under stirring conditions, add Continue to stir the required amount of sodium metaaluminate solution for 1 to 2 minutes. When the solution is ensured to be e...
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Abstract
The invention provides a preparation method of a glass wool-aluminum silicon aerogel composite heat preservation plate.The heat preservation plate is prepared from sodium metaaluminate, water glass and glass wool and obtained through dissolving, solvent displacing and drying.According to the preparation method, sodium metaaluminate and the water glass are adopted as the raw materials, and the production raw materials are cheap; a gel process is achieved through the step that the two materials are blended and then subjected to a gel reaction, and therefore the other complex sol-gel processes for aerogel are avoided; the integrity and the mechanical property of the obtained product are both significantly improved; the whole preparation method is simple, easy to control, free of strong acid and strong base corrosion, low in requirement for equipment and suitable for industrialized production after the process is amplified.
Description
technical field [0001] The invention relates to a preparation method of a thermal insulation board, in particular to a preparation method of a glass wool / silicon aluminum airgel composite thermal insulation board. Background technique [0002] Airgel is the material with the lowest thermal conductivity among solid substances, which is only slightly higher than vacuum, about 0.013W / m·K. Airgel also has an extremely low density, which is recognized as the least dense solid in the world, and the lowest density can reach 3kg / m 3 , which is slightly denser than air. Therefore, airgel is the thermal insulation material with the best thermal insulation effect and the smallest density in the world. [0003] At present, there are many types of aerogels, including carbon aerogels, silicon-based aerogels, and alumina aerogels. The raw material for the preparation of silica aerogel can be tetraethyl orthosilicate or sodium silicate, and the preparation process can use normal pressure...
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IPC IPC(8): C04B28/00C01B33/32C03C13/00C04B14/42
CPCC01B33/32C03C13/00C04B28/005C04B2201/32C04B2201/20C04B14/42
Inventor 杨卓舒纪勇孟宪娴
Owner ZHUO DA NEW MATERIAL TECH GRP