KR20200073730A - Method of preparing for aerogel blanket - Google Patents

Abstract

The present invention provides a method of manufacturing an aerogel blanket, comprising the steps of: preparing a silica sol containing a silica precursor, alcohol and water; forming silica gel by adding a basic catalyst to the silica sol; and depositing a substrate on the silica gel, wherein the silica precursor is a mixture of a tetraalkoxy silane compound and an alkyl alkoxy silane compound in a molar ratio of 4 : 6 to 8 : 2. The silica gel manufactured according to the present invention can penetrate evenly into an interior of a substrate and penetrate into the substrate with low density, thereby ensuring excellent thermal insulation performance.

Description

Manufacturing method of airgel blanket{METHOD OF PREPARING FOR AEROGEL BLANKET}

The present invention relates to a method of manufacturing an airgel blanket.

Aerogel is an ultra-porous, high specific surface area (≥500 m ² /g) material with a porosity of about 90% to 99.9% and a pore size in the range of 1 nm to 100 nm. It is a new material having. Accordingly, research on airgel material development as well as application of transparent insulating materials and environmentally friendly high-temperature insulation materials, ultra-low dielectric thin films for highly integrated devices, catalysts and catalyst carriers, electrodes for supercapacitors, and electrode materials for seawater desalination are being actively conducted.

The biggest advantage of the airgel is that it is lower than the conventional organic insulating materials such as Styrofoam, and it is capable of solving the fire vulnerabilities, which are the fatal weakness of the organic insulating materials, and the generation of harmful gases in case of fire.

In general, aerogels are often used by being applied to airgel blankets, and after forming a sol, an aerogel blanket performs a gelation reaction after depositing a substrate on the sol. Thereafter, further aging, solvent replacement, surface modification, and drying steps may be further performed. However, it is greatly affected by the time at which the gelation reaction starts (gelation time). For a specific example, if the gelation reaction is started on the silica sol before being deposited on the substrate, the silica sol cannot be deposited inside the substrate. On the other hand, if the gelation reaction is delayed, a subsequent process such as winding a blanket cannot proceed smoothly, and a problem may occur in that the entire process is stopped.

In addition, in order to produce a large amount of airgel blanket, the substrate is placed on a conveyor belt, a silica sol is applied to the substrate, and a gelation reaction is performed on the conveyor belt. There is a limitation that the gelation in the airgel blanket is non-uniform.

Therefore, in order to solve the above problems, it is time to develop a method for manufacturing an airgel blanket that does not cause a problem due to a gelation reaction during the process.

Korean Patent Publication No. 10-2017-0098003

The present invention is to solve the above problems, and after performing the gelation reaction first, by depositing the substrate on the formed silica gel, to provide a method of manufacturing an airgel blanket with minimal malfunction in the process according to the gelation reaction .

In one embodiment, the present invention comprises the steps of preparing a silica sol comprising a silica precursor, alcohol and water; Forming a silica gel by adding a basic catalyst to the silica sol; And depositing a substrate on the silica gel, wherein the silica precursor provides a method for preparing an airgel blanket in which a tetra alkoxy silane compound and an alkylalkoxy silane compound are mixed in a molar ratio of 4:6 to 8:2. do.

Meanwhile, the silica precursor may be a mixture of the tetraalkoxy silane compound and the alkylalkoxy silane compound in a molar ratio of 6:4 to 8:2.

For example, the tetra alkoxy silane compound is tetramethyl orthosilicate, tetraethyl orthosilicate, methyltriethyl orthosilicate, dimethyldiethyl orthosilicate, tetrapropyl orthosilicate, tetraisopropyl orthosilicate, tetra 1 or selected from the group consisting of butyl orthosilicate, tetrasecondarybutyl orthosilicate, tetratertarybutyl orthosilicate, tetrahexylorthosilicate, tetracyclohexyl orthosilicate and tetradodecyl orthosilicate It may include a combination of.

For example, the alkylalkoxy silane compound is selected from the group consisting of methyltriethoxysilane, dimethyldiethoxysilane, trimethylethoxysilane, methyltrimethoxysilane, dimethyldimethoxysilane and trimethylmethoxysilane, or Combinations of these.

Meanwhile, the basic catalyst and the alcohol may be included in a volume ratio of 1:4 to 1:100.

For example, the density of the substrate may be 10㎏/㎥ to 40㎏/㎥.

For another example, the density of the substrate may be 120 kg/m 3 to 160 kg/m 3.

Meanwhile, the step of depositing the substrate on the silica gel may be performed by applying the silica gel to the substrate and then pressing it.

For another example, the moisture impregnation rate of the airgel blanket prepared according to the present invention may be 4 wt% or less.

For another example, the airgel blanket prepared according to the present invention may have a water impregnation rate in the above range and a thermal conductivity of 18.5 mW/mK or less.

The method of manufacturing the airgel blanket according to the present invention preferentially proceeds a silica gelation reaction that is greatly affected by the execution time and temperature conditions, and then deposits the silica sol onto the substrate and then performs the gelation reaction. Alternatively, it is possible to effectively control process problems caused by the start time of the silica gelation reaction.

On the other hand, the silica gel prepared according to the present invention can be uniformly penetrated into the substrate, but also can penetrate into the low-density substrate, and thus has better thermal insulation performance.

Hereinafter, the present invention will be described in more detail to aid understanding of the present invention.

The terms or words used in the present specification and claims should not be interpreted as being limited to ordinary or lexical meanings, and the inventor can appropriately define the concept of terms in order to best describe his or her invention. Based on the principle that it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

The method of manufacturing the airgel blanket according to the present invention includes: (1) preparing a silica sol; (2) forming a silica gel by adding a basic catalyst to the silica sol; And (3) depositing a substrate on the silica gel. Hereinafter, each step will be described in order.

(1) silica sol preparation step

The silica sol may be prepared by mixing water, alcohol, and an acid catalyst together with a silica precursor.

A method of manufacturing a general airgel blanket is performed by gelation reaction after depositing the substrate on the silica sol as shown in FIG. 1. This is because, when the gelation reaction is first performed, a silica precursor or the like loses fluidity and is entangled with each other to form a network, such as a network structure, and it is difficult to uniformly impregnate the silica sol even inside the substrate.

Therefore, there is a limitation in the conventional method of manufacturing an airgel blanket that the process of depositing the substrate on the silica sol must be performed before the gelation process. However, in the case of a gelation reaction, it is often influenced by temperature, and in many cases, a process problem occurs during the gelation process. For example, in a process such as applying a silica sol on a substrate in order to deposit a substrate on the silica sol, if the gelation reaction starts, the silica sol is not uniformly deposited on the substrate, as well as supplying the silica sol A problem that the piping is clogged by a gelation reaction may occur. Meanwhile, in order to manufacture an airgel blanket, in addition to a gelling process, an aging process, a surface modification process, a drying process, and a winding process for storing the prepared airgel blanket are further performed, and the gelation reaction is performed to facilitate the process. It is often carried out directly on mobile process means such as conveyor belts. At this time, if the gelation reaction is delayed after the silica gel is deposited on the substrate, there is a problem in that the entire process is stopped because the subsequent process cannot be performed. However, in the case of a mobile process means such as a conveyor belt, since it is difficult to control the temperature, it is difficult to control the gelation reaction itself, and there is a limitation in that the above problems are frequently generated during the process.

Therefore, in the case of the present invention, after the silica gel was prepared in advance to minimize the above process problems, the silica gel was deposited in the substrate.

More specifically, the silica precursor used in the silica gel is a tetra alkoxy silane compound and an alkylalkoxy silane compound mixed in a molar ratio of 4:6 to 8:2, more preferably, 6:4 to 8:2 It may have been done. When using a silica precursor in which a tetra alkoxy silane compound and an alkylalkoxy silane compound are mixed in the molar ratio range, the silica gel formed in a subsequent step is easily penetrated into the fiber, and when the silica gel is supplied to a substrate, etc. The clogging phenomenon of can be minimized.

For example, the tetra alkoxy silane compound is tetramethyl orthosilicate (TMOS), tetraethyl orthosilicate (TEOS), methyl triethyl orthosilicate (methyl triethyl orthosilicate), dimethyldiethyl Orthosilicate (dimethyl diethyl orthosilicate), tetrapropyl orthosilicate (tetrapropyl orthosilicate), tetraisopropyl orthosilicate (tetraisopropyl orthosilicate), tetrabutyl orthosilicate (tetrabutyl orthosilicate), tetra secondary butyl orthosilicate (tetra secondary butyl orthosilicate, tetra tertiary butyl orthosilicate, tetrahexyl orthosilicate, tetracyclohexyl orthosilicate, tetradodecyl orthosilicate, etc. Can.

For example, the alkylalkoxy silane compound is methyltriethoxysilane (MTES), dimethyldiethoxysilane (DMDES), trimethylethoxysilane (TMES), methyltrimethoxysilane (MTMS), dimethyldimethoxysilane (DMDMS ) And trimethylmethoxysilane (TMMS).

On the other hand, in the case of the alcohol used when preparing the silica sol, it is used to promote the surface modification reaction and to control the degree of hydrophobicity of the final produced silica airgel blanket. The alcohol is specifically a monohydric alcohol such as methanol, ethanol, isopropanol, butanol; Or it may be a polyhydric alcohol such as glycerol, hydrous ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, and sorbitol, and any one or a mixture of two or more thereof may be used. Among these, when considering miscibility with water and airgel, it may be a monohydric alcohol having 1 to 6 carbon atoms, such as methanol, hydrous ethanol, isopropanol, and butanol.

In addition, the acid catalyst is used to adjust the pH to promote the gelation reaction of the silica sol. For example, by adding the acid catalyst, the pH of the silica sol can be adjusted to about 1 to 3. However, in consideration of the components contained in the silica sol or the conditions of the gelation reaction, the pH value to be adjusted may vary. Meanwhile, the acid catalyst may be any acid as long as it can cause an oxidation reaction to promote a gelation reaction, and specifically, one or more inorganic acids such as nitric acid, hydrochloric acid, acetic acid, sulfuric acid, and hydrofluoric acid may be used. However, it is not limited to those listed above.

At this time, the silica sol, the silica precursor and water may be mixed in a molar ratio of 1:4 to 1:1. Meanwhile, the silica sol, the silica precursor and the alcohol may be mixed in a weight ratio of 1:2 to 1:9, preferably 1:4 to 1:6. When the silica precursor, water and alcohol are mixed within the respective ranges, pore sizes of the finally formed airgel blanket may be uniformly formed, and density may also be adjusted to an appropriate level to improve thermal insulation performance.

(2) silica gel formation step

The step of forming a silica gel by adding a basic catalyst to the silica sol will be described.

As described in step (1), in the case of the existing airgel blanket, the silica gel forming step is generally performed after the silica sol is supplied to the substrate to facilitate the deposition of the substrate and the supply of the silica sol. . However, in the case of the present invention, in order to minimize process problems due to the silica gelation reaction, a step of forming silica gel is first performed, and silica gel is supplied to the substrate.

At this time, the basic catalyst serves to promote gelation by increasing the pH of the silica sol. For example, inorganic bases, such as sodium hydroxide and potassium hydroxide; Alternatively, an organic base such as ammonium hydroxide (ammonia aqueous solution) may be mentioned, but in the case of an inorganic base, an organic base may be preferable because the metal ion contained in the compound may be coordinated with the Si-OH compound. Specifically, the organic base is ammonium hydroxide (NH ₄ OH), tetramethylammonium hydroxide (TMAH), tetraethylammonium hydroxide (TEAH), tetrapropylammonium hydroxide (TPAH), tetrabutylammonium hydroxide (TBAH), methylamine, ethylamine, isopropylamine, monoisopropylamine, diethylamine, diisopropylamine, dibutylamine, trimethylamine, triethylamine, triisopropylamine, tributylamine, choline, Monoethanolamine, diethanolamine, 2-aminoethanol, 2-(ethyl amino)ethanol, 2-(methyl amino)ethanol, N-methyl diethanolamine, dimethylaminoethanol, diethylaminoethanol, nitrilotriethanol, 2 -(2-aminoethoxy)ethanol, 1-amino-2-propanol, triethanolamine, monopropanolamine, or dibutanolamine, and the like, and any one or a mixture of two or more thereof may be used. More specifically, in the present invention, the base may be ammonium hydroxide (NH ₄ OH).

At this time, the basic catalyst is used to control the silica gelation reaction, wherein the basic catalyst and the alcohol are in a 1:4 to 1:100 volume ratio, preferably 1:4 to 1:20 volume ratio, more preferably 1: It may be included in a volume ratio of 5 to 1:10. The content of the basic catalyst may vary depending on the degree of gelation to be produced. The silica gel produced according to the present invention must be able to penetrate the substrate, and clogging of the supply portion of the silica gel in the step of supplying the substrate will not occur. Since the degree of aggregation and the like should be controlled at a level, it is preferable to use the basic aqueous solution in the volume range as a basic catalyst.

(3) Step of deposition on silica gel

The step of depositing the substrate on the silica gel will be described.

For example, the deposition can be made in a reaction vessel that can accommodate a substrate, and can be deposited by pouring or impregnating a silica gel into the reaction vessel, or by putting a substrate into a reaction vessel containing silica gel. have. Alternatively, a method may be used in which silica gel is supplied to the substrate after the substrate is placed on a movable process means such as a conveyor belt.

More preferably, the step of depositing the substrate on the silica gel may be performed by applying the silica gel to the substrate and then pressing it. In the case of the silica gel according to the present invention, unlike the silica sol, a network in the form of a network structure formed by agglomeration between silica precursors is already formed inside the silica gel.

Therefore, when the silica gel is applied to the substrate and then pressurized, the silica gel can be uniformly permeated into the substrate.

On the other hand, the form of the substrate may be a film, sheet, net, fiber, porous body, foam, non-woven fabric, or a laminate of two or more of them. Also, depending on the application, the surface roughness may be formed or patterned. More specifically, the substrate may be a fiber that can further improve thermal insulation performance, including spaces or voids in which silica airgel is easily inserted.

Specifically, the material of the base material is polyamide, polyethylene terephthalate, polybenzimidazole, polyaramid, acrylic resin, phenol resin, polyester, polyether ether ketone (PEEK), polyolefin (for example, polyethylene, polypropylene or Copolymers of these), cellulose, carbon, cotton, wool, hemp, nonwoven fabric, glass fiber or ceramic wool.

At this time, the substrate may have a different density depending on the material used, for example, a substrate having a density of 10㎏/㎥ to 40㎏/㎥ may be used. When the substrate is deposited on the silica sol, when using a substrate having a density in the above range, the silica sol may pass through the pores in the substrate, so it is difficult to use a substrate having a density in the above range.

However, in the case of the present invention, since silica gel, not silica sol, is deposited and used on a substrate, even when a low-density substrate is used, the silica gel does not pass through the pores in the substrate and remains uniformly penetrated. Can be.

On the other hand, according to the manufacturing method according to the present invention, not only a substrate having a density within the above range, but also a relatively high-density substrate can be used. For example, a substrate having a density range of 120 kg/m 3 to 160 kg/m 3 can be used.

Therefore, in the case of the present invention, it can be applied to substrates having various density ranges, and thus it is possible to manufacture airgel blankets for various uses, and mechanical properties and the like can also be adjusted accordingly.

Meanwhile, the moisture impregnation rate of the airgel blanket according to the present invention may be 4 wt% or less. Preferably it may be 3 wt% or less, more preferably 2.5 wt% or less. The moisture impregnation rate of the airgel blanket is a measure of the degree of hydrophobicity of the finally manufactured airgel blanket, and can be calculated by comparing the degree of moisture impregnation before and after by impregnating the airgel blanket with water. More specifically, the weight increase rate is calculated as the moisture impregnation rate by comparing the weight of the airgel blanket before impregnation with water and the weight of the airgel blanket after impregnation.

In general, in the case of an airgel blanket, when water is absorbed, the thermal conductivity increases rapidly with water. Therefore, in the case of the airgel blanket according to the present invention, it has a moisture impregnation rate in the above range, it is possible to suppress the increase in the increase rate of thermal conductivity at room temperature (25 ℃). On the other hand, the airgel blanket having a water impregnation rate in the above range has a high degree of hydrophobicity, so water repellency is improved, and when applied to an insulating material, corrosion of the pipe due to internal moisture (Corrosion under insulation, CUI) may be prevented have.

On the other hand, the present invention, after the above steps are completed, it is possible to further enhance the mechanical stability, further comprising the step of aging the substrate deposited on the silica gel at a suitable temperature to complete the chemical change, and then, the surface modification step It may further include a hydrophobic surface of the gel to suppress the absorption of moisture in the air to maintain a low thermal conductivity.

At this time, the airgel blanket prepared according to the present invention has a moisture impregnation rate in the above range, and the thermal conductivity may be 18.5 mW/mK or less, more preferably 18.4 mW/mK or less. When the airgel blanket has a moisture impregnation rate and thermal conductivity within the above range, it is possible to maintain a good level of thermal conductivity by maintaining a certain level of thermal conductivity before and after the moisture is absorbed.

Meanwhile, a drying step may be further performed after the step, and the drying may be performed by atmospheric pressure drying or supercritical drying.

In addition, the airgel blanket manufactured through the above steps may further manufacture at least one functional layer to produce a composite insulating sheet.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art to which the present invention pertains can easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[Example]

1. Example 1

After preparing a silica precursor solution by mixing tetraethyl orthosilicate (TEOS), methyltriethoxysilane (MTES) and water in a molar ratio of 6:4:28, the silica precursor solution and ethanol have a weight ratio of 1:5. Silica sol was prepared by adding ethanol to the silica precursor solution. In order to promote hydrolysis, a 30% by weight aqueous hydrochloric acid solution was added so that the pH of the silica sol was 3 or less. Next, an ammonia ethanol solution in which 1% by volume of ammonia was dissolved was prepared. Then, a silica gel was prepared by adding the ammonia ethanol solution so that the silica sol and the ammonia ethanol solution (1 volume% of ammonia) were in a volume ratio of 9:1. Thereafter, glass fibers having a density of 130 kg/m 3 were prepared as a substrate, sprinkled with the silica gel on the substrate, and then pressed with a roller to deposit silica gel on the substrate to form a silica gel composite. Then, the silica gel composite was placed in a supercritical extractor and CO ₂ was injected. Thereafter, the temperature in the extractor was increased to 60° C. for 1 hour, and supercritical drying was performed at 60° C. and 100 bar. Thereafter, after venting CO ₂ over 2 hours, an airgel blanket was prepared by drying under normal pressure in an oven at 150°C.

2. Example 2

An airgel blanket was prepared in the same manner as in Example 1, except that silica sol was prepared by mixing tetraethyl orthosilicate (TEOS) and methyltriethoxysilane (MTES) with water in a molar ratio of 8:2:34. It was prepared.

3. Example 3

An airgel blanket was prepared in the same manner as in Example 1, except that silica sol was prepared by mixing tetraethyl orthosilicate (TEOS) and dimethyltriethoxysilane (DMDES) with water in a molar ratio of 7:3:34. It was prepared.

4. Example 4

Except that tetraethyl orthosilicate (TEOS) and methyl triethoxysilane (MTES) and water were prepared in a silica sol at a molar ratio of 7:3:31, and polyethylene terephthalate having a density of 20 kg/m 3 was used as the substrate. Then, Example 3 Airgel blanket was prepared in the same manner.

[Comparative example]

1. Comparative Example 1

A silica precursor solution was prepared by mixing tetraethyl orthosilicate (TEOS) and water in a molar ratio of 1:4, and then adding ethanol so that the silica precursor and ethanol had a weight ratio of 1:5. . Then, 30% by weight of an aqueous hydrochloric acid solution was added so that the pH of the silica precursor solution was 3 or less to promote hydrolysis. Next, an ammonia ethanol solution in which 1% by volume of ammonia was dissolved was prepared. Thereafter, a silica sol was prepared by adding the ammonia ethanol solution so that the volume of the silica precursor solution and the ammonia ethanol solution (1 vol% ammonia) was 9:1. Then, a polyethylene terephthalate fiber having a density of 20 kg/m 3 was prepared as a substrate, and the silica sol was deposited on the substrate to form a silica gel composite. Thereafter, the silica gel composite was placed in a supercritical extractor and CO ₂ was injected. Thereafter, the temperature in the extractor was increased to 60°C for 1 hour, and supercritical drying was performed at 60°C and 100 bar. Thereafter, after venting CO ₂ over 2 hours, an airgel blanket was prepared by further drying under normal pressure in an oven at 150°C.

2. Comparative Example 2

An airgel blanket was prepared in the same manner as in Example 1, except that a silica precursor solution was prepared by mixing tetraethylorthosilicate (TEOS) and water in a 1:4 molar ratio.

3. Comparative Example 3

An airgel blanket was prepared in the same manner as in Example 1, except that a silica precursor in which a tetraethylorthosilicate (TEOS), methyltriethoxysilane (MTES), and water were mixed at a molar ratio of 9:1:39 was used. .

4. Comparative Example 4

An airgel blanket was prepared in the same manner as in Example 1, except that a silica precursor in which a tetraethylorthosilicate (TEOS), methyltriethoxysilane (MTES), and water were mixed at a 3:7:33 molar ratio was used. .

5. Comparative Example 5

An airgel blanket was prepared in the same manner as in Example 4, except that a silica precursor in which a tetraethylorthosilicate (TEOS), methyltriethoxysilane (MTES) and water were mixed at a molar ratio of 3:7:33 was used. .

Experimental Example

The physical properties of Examples 1 to 4 and Comparative Examples 1 to 5 were measured, and the results are shown in Table 1 below.

1) Thermal conductivity at room temperature (mW/mK, 25℃)

The airgel blankets prepared in Examples and Comparative Examples were measured at room temperature thermal conductivity using NETZSCH HFM 436 equipment.

2) Moisture impregnation rate (hydrophobicity) measurement (wt%)

Prepare a specimen having a size of 100 mmX100 mm with a silica airgel blanket prepared in Examples and Comparative Examples, float the specimen on distilled water at 21±2° C., and sink the mesh screen to 127 mm below the water surface (impregnation). After 15 minutes, the mesh screen is removed, and when the specimen rises, the specimen is picked up with a clamp and suspended vertically for 60±5 seconds. Thereafter, the weight of the specimen before and after impregnation was measured, and the weight increase rate was calculated by Equation 1 below, which is defined as the moisture impregnation rate.

[Equation 1]

Weight increase rate (= moisture impregnation rate, wt%) = (weight of specimen after impregnation/weight of specimen before impregnation) X100wt%

Thermal conductivity (mW/mK) Moisture impregnation rate (wt%) Example 1 18.4 2.2 Example 2 17.8 2.0 Example 3 18.1 1.7 Example 4 16.0 2.3 Comparative Example 1 17.3 8.5 Comparative Example 2 19.8 28 Comparative Example 3 20.4 25 Comparative Example 4 26.0 4.9 Comparative Example 5 23.2 7.8

As described in Table 1 above, the Examples can be confirmed that the thermal conductivity is improved as the thermal conductivity is low compared to the Comparative Example, and the water impregnation rate is remarkably low, indicating that the water repellency is high.

However, in the case of Comparative Example 1, the thermal conductivity is similar to that of the Examples, but the moisture impregnation rate is remarkably high compared to the Examples, and the thermal conductivity may be rapidly increased, so that the heat insulating properties are significantly reduced when absorbing moisture. You can confirm.

Claims (10)

Preparing a silica sol comprising a silica precursor, alcohol and water;
Forming a silica gel by adding a basic catalyst to the silica sol; And
Including; depositing a substrate on the silica gel;
The silica precursor is a tetra alkoxy silane compound and an alkylalkoxy silane compound is a method of manufacturing an airgel blanket that is mixed in a molar ratio of 4:6 to 8:2.
According to claim 1,
The silica precursor is a method for producing an airgel blanket, wherein the tetraalkoxy silane compound and the alkylalkoxy silane compound are mixed in a molar ratio of 6:4 to 8:2.
According to claim 1,
The tetra alkoxy silane compound is tetramethyl orthosilicate, tetraethyl orthosilicate, methyltriethyl orthosilicate, dimethyldiethyl orthosilicate, tetrapropyl orthosilicate, tetraisopropyl orthosilicate, tetrabutyl orthosilicate , One or a combination selected from the group consisting of tetrasecondarybutyl orthosilicate, tetratertarybutyl orthosilicate, tetrahexylorthosilicate, tetracyclohexyl orthosilicate and tetradodecyl orthosilicate or combinations thereof The manufacturing method of the airgel blanket.
According to claim 1,
The alkylalkoxy silane compound is selected from the group consisting of methyltriethoxysilane, dimethyldiethoxysilane, trimethylethoxysilane, methyltrimethoxysilane, dimethyldimethoxysilane and trimethylmethoxysilane, or a combination thereof. Method of manufacturing an airgel blanket that includes.
According to claim 1,
The basic catalyst and the alcohol is 1:4 to 1:100 method of manufacturing an airgel blanket that is included in a volume ratio.
According to claim 1,
The density of the substrate is 10 ㎏ / ㎥ to 40 ㎏ / ㎥ method of manufacturing an airgel blanket.
According to claim 1,
The density of the substrate is 120 ㎏ / ㎥ to 160 ㎏ / ㎥ method of manufacturing an airgel blanket.
According to claim 1,
The step of depositing the base material on the silica gel is performed by applying the silica gel to the base material and then pressurizing the airgel blanket.
According to claim 1,
The method of manufacturing an airgel blanket, wherein the water impregnation rate of the airgel blanket is 4 wt% or less.
The method of claim 9,
The method of manufacturing an airgel blanket, wherein the heat conductivity of the airgel blanket is 18.5 mW/mK or less.