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Aerogel and method for producing same

A manufacturing method, aerogel technology, applied in chemical instruments and methods, silica, inorganic chemistry, etc., can solve problems such as gel shrinkage, and achieve the effect of less volume shrinkage

Pending Publication Date: 2020-05-15
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of drying under such normal pressure, there is a tendency for the gel to shrink due to the pressure caused by the capillary force inside the alcogel

Method used

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  • Aerogel and method for producing same
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  • Aerogel and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] 100 parts by mass of "XR31-B1410" (manufactured by Momentive High-Tech Materials Japan Contract Co., Ltd., product name) as a silane oligomer, and 100 parts by mass of tetraethoxysilane "KBE-04" (Shin-Etsu Chemical Co., Ltd. manufactured, product name, hereinafter abbreviated as "TEOS") 50 parts by mass, 300 parts by mass of 2-propanol, and 100 parts by mass of water were mixed, 0.1 part by mass of acetic acid as an acid catalyst was added thereto, and the reaction was carried out at 25° C. for 4 hours, Obtain the sol. 80 parts by mass of aqueous ammonia at a concentration of 5% was added as an alkali catalyst to the obtained sol, and gelation was performed at 60° C. for 1 hour, followed by aging at 60° C. for 48 hours to obtain a wet gel. Then, the obtained wet gel was dried under normal pressure at 25° C. for 72 hours, and then at 150° C. for 2 hours, thereby obtaining an airgel.

Embodiment 2

[0155] Except having used "SR-2402" (made by Toray Dow Corning Co., Ltd., product name) as a silane oligomer, it carried out similarly to Example 1, and produced the airgel.

Embodiment 3

[0157] Except having used "AY42-163" (made by Toray Dow Corning Co., Ltd., product name) as a silane oligomer, it carried out similarly to Example 1, and produced the airgel.

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Abstract

A method for producing an aerogel, the method comprising: a sol generation step for hydrolyzing a silane oligomer to generate a sol containing a hydrolyzate of the silane oligomer; a wet gel generation step for gelling the sol to obtain a wet gel; and a drying step for drying the wet gel to obtain an aerogel, wherein the proportion of silicon atoms that are bonded to three oxygen atoms relative tothe total number of silicon atoms in the silane oligomer is at least 50%.

Description

technical field [0001] The present invention relates to aerogels and methods for their manufacture. Background technique [0002] Silica aerogel is known as a material having low thermal conductivity and thermal insulation properties. Silica airgel is useful as a functional raw material having excellent functionality (thermal insulation, etc.), specific optical characteristics, specific electrical characteristics, etc. Electronic substrate materials with low dielectric constant characteristics, high thermal insulation materials using silica aerogels, ultra-low refractive index light reflection materials using silica aerogels, etc. [0003] As a method for producing such a silica airgel, it is known that an alkoxysilane is hydrolyzed and polymerized to obtain a gel-like compound (alcogel), and the resulting gel-like compound (alcogel) is dispersed in A supercritical drying method in which the medium is dried under supercritical conditions (see, for example, Patent Document ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/16
CPCC01B33/16C01B33/155C01B33/1585C01B33/146C01B33/145C01B33/163C01P2006/32
Inventor 高安慧牧野龙也小竹智彦泉宽之小暮海斗
Owner RESONAC CORPORATION