Silica aerogel material and preparation method thereof

A silica and aerogel technology, applied in the direction of silica, silica, chemical industry, etc., can solve the problem of reducing the brittleness of aerogel, reducing the effect of heat conduction and energy saving, not mentioning material density, thermal conductivity and hydrophobicity , flexibility, strength and other performance issues, to achieve the effect of easy industrial production, reduce material brittleness, and strengthen the connection force

Active Publication Date: 2013-06-05
海鹰空天材料研究院(苏州)有限责任公司
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Problems solved by technology

[0005] Chinese patent CN200720077474.1 reports a laminated glass filled with SiO 2 The airgel material improves the energy-saving performance of the building. It reduces the brittleness of the airgel and reduces the existence of cracks by filling the airgel material with a large number of inorganic fibers, but greatly affects the light transmittance of the glass; Chinese patent CN200910193595.6 reports A transparent airgel thin film material was prepared by controlling the process conditions using an acid/alkali two-step catalysis method, but no transparent bulk airgel material that can be used for laminated glass has been reported; Chinese patent CN200720077474.1 reported the use of oxide nanowires The method of strengthening the airgel material produces a transparent bulk airgel material

Method used

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  • Silica aerogel material and preparation method thereof
  • Silica aerogel material and preparation method thereof
  • Silica aerogel material and preparation method thereof

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Embodiment 1

[0031] (1) Preparation of sol-gel: Take 1520g methyl orthosilicate, mix evenly with methyl orthosilicate, methanol, and deionized water in a molar ratio of 1:10:10, then gradually add methyl orthosilicate 1wt% polyethylene glycol 1000 of the total weight of methanol, deionized water as the gel particle structure crosslinking agent and 10wt% of the total weight of methyl orthosilicate, methanol, deionized water N, N-dimethyl Use methyl orthosilicate as a gel pore modifying agent, stir evenly, then add ammonia water according to the molar ratio of methyl orthosilicate and catalyst of 1:0.05 and stir evenly to obtain silica sol; then fill the silica sol into a flat mold of 400x400mm and seal it After standing at 20°C, a gel was formed after 2 hours.

[0032] (2) Gel aging, hydrophobization, and solvent replacement: Aging the gel prepared in step (1) at room temperature for 72 hours; adding 3000 g of hexamethyldisilazide with a mass percentage of 5 wt % to the flat mold The metha...

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Abstract

The invention provides a novel silica aerogel material which is diaphanous, adiabatic, heat-retaining and noise-proof and a preparation method of the silica aerogel material. The silica aerogel material has the advantages of being high in tenacity strength, high in transparency, flawless, light in mass, low in density, especially big in block and the like. The silica aerogel material besides can be used in the field of energy saving buildings such as glass curtain walls, doors and windows which are heat-retaining, adiabatic and noise-proof, can be further used in the fields such as aerospace, petroleum and petrochemical, new energy resources, ships and refrigeration, and has good application prospect.

Description

technical field [0001] The invention relates to a silica airgel material and a preparation method thereof, in particular to a low-density, low thermal conductivity, tough, transparent, crack-free bulk silica airgel material and its preparation method. Background technique [0002] Airgel material is a kind of gel material whose dispersion medium is gas. It is a nanoporous solid material with a network structure composed of colloidal particles or polymer molecules. The material has high porosity and light transmission. High efficiency, large specific surface area, small density, low thermal conductivity and other remarkable characteristics, have broad application potential in thermal, acoustic, optical, microelectronics, particle detection and other aspects. [0003] The airgel material with high light transmittance is used in the interlayer of glass windows, which can not only meet the requirements of daylighting and lighting, but also block the heat exchange between indoor...

Claims

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Application Information

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IPC IPC(8): C01B33/16
CPCY02P20/10
Inventor 金兆国周清詹万初邹军锋张昊
Owner 海鹰空天材料研究院(苏州)有限责任公司
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