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Method for manufacturing low-dust high-insulation aerogel blanket

An airgel felt and gel technology, which is applied in the field of airgel felt preparation, can solve the problems of improving thermal conductivity, etc., and achieve the effects of improving adhesion, improving thermal conductivity, and reducing dust generation

Pending Publication Date: 2018-02-23
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the gel casting method, there is a problem that the thermal conductivity is improved due to the binder, etc.

Method used

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  • Method for manufacturing low-dust high-insulation aerogel blanket
  • Method for manufacturing low-dust high-insulation aerogel blanket
  • Method for manufacturing low-dust high-insulation aerogel blanket

Examples

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preparation example Construction

[0036] The present invention provides a kind of preparation method of airgel felt, comprising:

[0037] a) preparation of substrates for mats surface-treated with an acid solution;

[0038] b) preparing a silica sol comprising a water glass solution;

[0039] c) impregnating said surface-treated substrate for felt with said silica sol;

[0040] d) gelling the silica sol in a state where the base material for felt is impregnated with the silica sol; and

[0041] e) Perform surface modification and drying.

[0042] Hereinafter, each step of the preparation method of the airgel mat of the present invention will be described in detail.

[0043] Step a)

[0044] Step a) according to one embodiment of the present invention is a step of improving the adhesion performance of the silica airgel by increasing the roughness and porosity of the surface of the substrate used for the felt in the airgel felt, wherein, Substrates for felting are pretreated with an acid solution.

[004...

Embodiment 1 to 3

[0103] With acetic acid (CH 3 COOH) treated glass mat to prepare a silica sol containing 5.2% by weight of water glass solution. The glass mat surface-treated with acetic acid was impregnated with silica sol, and treated with acetic acid as an acid catalyst to induce gelation. Thereafter, after aging at 80° C. for 20 minutes to 30 minutes, solvent replacement with methanol was performed 3 to 4 times at 50° C. Subsequently, surface modification was carried out with 70 v / v % methanol and 30 v / v % HMDS at 50 °C for 5 hours to 6 hours, the mixture was washed three times with hexane over 2 hours to 3 hours to remove by-products, and then Dry at 150°C for 1 hour to prepare an airgel mat.

Embodiment 4 to 6

[0105] An airgel mat was prepared in the same manner as in Examples 1 to 3, except that the glass mat was treated with hydrochloric acid (HCl) instead of acetic acid.

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Abstract

The present invention relates to a method for manufacturing an aerogel blanket, and a low-dust high-insulation aerogel blanket manufactured by the present invention, the method: increasing the adhesive performance of silica aerogel by activating the surface of a substrate for a blanket and increasing the roughness and porosity of the surface of the substrate for a blanket since the etching of thesurface of the substrate for a blanket is induced by using an acidic solution; and simultaneously increasing mechanical flexibility and inhibiting the generation of dust by further carrying out a gelmodification step in which cracks are introduced to the aerogel.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the priority and benefit of Korean Patent Application No. 10-2016-0036640 filed on March 28, 2016 and Korean Patent Application No. 10-2016-0176015 filed on December 21, 2016, both of which The disclosure of this application is incorporated by reference in its entirety into this application. technical field [0003] The present invention relates to a method for preparing an airgel felt, comprising the step of using an acid solution to induce etching (etching) on ​​the surface of a substrate for the felt; and low-dust (low-dust) and High-insulation airgel felt. Background technique [0004] Since airgel is about 90% to 99.9% porosity, pore size in the range of 1nm to 100nm and specific surface area (≥500m 2 / g) Higher ultra-porous materials, and also materials with excellent properties such as ultra-light / ultra-thermal insulation / ultra-low dielectric properties, therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C01B33/158C04B35/624B32B5/26
CPCB01J13/0091C01B33/1585C03C15/00C04B28/24C04B35/82C04B2111/28C04B2201/32C04B2235/3201C04B2235/3427C04B2235/616B32B5/26B32B17/06C04B14/38C04B38/0045C04B14/42C04B16/06C04B35/62222C04B35/624B32B5/022B32B2260/023B32B2260/04C01B33/146
Inventor 吴景实李悌均裴东植孙桢勋
Owner LG CHEM LTD
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