WO2017069315A1

WO2017069315A1 - Hydrophilic aerogel, mixed composition including both hydrophilicity and hydrophobicity, aerogel paste prepared from composition, and methods for preparing aerogel and composition

Info

Publication number: WO2017069315A1
Application number: PCT/KR2015/011619
Authority: WO
Inventors: 김태원
Original assignee: 한양대학교 산학협력단
Priority date: 2015-10-21
Filing date: 2015-11-02
Publication date: 2017-04-27
Also published as: KR101656670B1

Abstract

A method for preparing a hydrophilic aerogel according to an embodiment of the present invention may comprise the steps of: preparing a hydrophobic aerogel; and sintering the hydrophobic aerogel to prepare a hydrophilic aerogel. According to an embodiment of the present invention, the preparing process can be simplified by preparing a mixed composition comprising both hydrophilicity and hydrophobicity through a process in which the hydrophobic aerogel is sintered in an elevated temperature condition.

Description

Hydrophilic airgel, mixed composition including both hydrophilicity and hydrophobicity, airgel paste prepared from the composition, and aerogel and its preparation method

Disclosed are a hydrophilic airgel, a mixed composition comprising both hydrophilicity and hydrophobicity, an airgel paste prepared from the composition, and a process for producing the airgel and the composition. More specifically, a hydrophilic aerogel, a mixture containing both hydrophilicity and hydrophobicity, and a composition thereof, which can simplify the manufacturing process by manufacturing a mixed composition including both hydrophilicity and hydrophobicity by sintering the hydrophobic airgel at elevated temperature. Disclosed are an airgel paste to be produced and a method for producing the airgel and the composition thereof.

Aerogels are nanoporous materials having high microporosity and thus have heat shielding, noise, and electromagnetic shielding properties, and are used in various industrial fields such as sound insulation materials for construction and construction, and acoustic wave retardants. In addition, as a functional cosmetics, it can protect the skin from external heat and ultraviolet rays. Especially, the nano-porous structure of the material makes it possible to express excellent moisturizing power. Can be maintained. In addition, a number of fine pores can absorb a volume of sebum several times larger than its own size, and can also help to improve adhesion and skin wrinkles through reflection of light.

These aerogels can be divided into hydrophilic and hydrophobic according to the degree of adsorption with water. Here, cosmetics should be able to have both hydrophobicity and hydrophilicity as an emulsion containing both oil and water at the same time. Hydrophobic airgel has a high heat shielding performance because there is no change in the size and volume of the micropores due to water absorption, but there is a structural limitation that can not contain moisture. Therefore, there is a need to simultaneously implement a hydrophilic-hydrophobic airgel that can contain appropriate moisture through physical or chemical treatments that can convert hydrophobic airgels into hydrophilic aerogels.

However, although the research on the conventional technology, that is, the hydrophilic airgel conversion process has been progressed to some extent, the problem of decreasing the airgel porosity still exists, and in particular, the study on the optimized hydrophilic-hydrophobic airgel that can be used as a cosmetic composition It is necessary.

An object according to an embodiment of the present invention is a mixture containing both hydrophilic airgel, hydrophilicity and hydrophobicity, which can simplify the manufacturing process by manufacturing a mixed composition containing both hydrophilicity and hydrophobicity by a process of sintering the hydrophobic airgel at elevated temperature A composition, an airgel paste prepared from the composition, and an airgel and a method for producing the composition are provided.

In addition, another object according to an embodiment of the present invention, the airgel paste prepared with a mixture composition containing both hydrophilicity and hydrophobicity has an excellent airgel porosity, for example, when produced as a cosmetic product, etc. It provides a hydrophilic airgel, a mixed composition containing both hydrophilicity and hydrophobicity, an airgel paste prepared from the composition, and a method for producing the airgel and the composition, which can contain moisture together to produce a quality cosmetic product, etc. will be.

Hydrophilic airgel according to an embodiment of the present invention may be represented by the following [Formula 1].

[Formula 1]

≡ Si-OH

According to one side, the hydrophilic airgel is prepared by converting a functional group from an alkyl group to a hydroxyl group through the sintering of the hydrophobic airgel, the hydrophilic airgel can be prepared through the sintering of the hydrophobic airgel.

According to one side, the hydrophilic airgel can be prepared through the sintering of hydrophobic airgel.

The mixed composition according to the embodiment of the present invention may include a hydrophilic airgel represented by the following [Formula 1] and a hydrophobic airgel represented by the following [Formula 2].

[Formula 1]

≡ Si-OH,

[Formula 2]

≡ Si-R

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).

According to one side, in the mixed composition, the volume ratio of the hydrophilic airgel and the hydrophobic airgel may be 3: 7 to 7: 3.

On the other hand, the airgel paste according to an embodiment of the present invention, a hydrophilic airgel represented by the following [Formula 1]; Hydrophobic airgel represented by the following [Formula 2]; And a solvent.

[Formula 1]

≡ Si-OH,

[Formula 2]

≡ Si-R

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).

According to one side, the mixing volume of the hydrophilic airgel and the hydrophobic airgel is 0.001% by volume to 10% by volume of the airgel paste, the volume ratio of the hydrophilic airgel and the hydrophobic airgel may be 3: 7 to 7: 3.

According to one side, the solvent is purified water, alcohol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylglycol oil, glycerol aliphatic ester, polyethylene glycol, fatty acid ester of sorbitan It may include at least one selected from the group consisting of.

According to one side, the solvent may be 40% by volume to 60% by volume of the airgel paste.

According to one side, the airgel paste may further comprise a thickener.

According to one side, the thickener is at least one selected from the group consisting of cellulose, hydroxypropyl cellulose, gelatin, methyl cellulose, carbomer, sodium carboxy methyl cellulose, guar gum, stearic acid, polyvinyl alcohol, collagen, mannan and carrageenan It may include.

According to one side, the thickener may be 1% by volume to 25% by volume of the airgel paste.

According to one side, it may further include at least one of a moisturizing agent, a surfactant and a preservative.

According to one side, the moisturizing agent may include at least one selected from the group consisting of glycerin, propylene glycol, ethylene glycol, butylene glycol, dipropylene glycol, pentylene glycol, hexylene glycol and sorbitol.

According to one side, the moisturizing agent, may be 1% by volume to 20% by volume of the airgel paste.

According to one side, the preservative may include at least one selected from the group consisting of phenoxyethanol, methyl paraben, ethyl paraben, mineral oil, isopropyl alcohol and natural preservatives.

According to one side, the preservative, may be 0.01% by volume to 3% by volume of the airgel paste.

According to one side, the surfactant may include at least one selected from the group consisting of coco betaine, lecithin, xanthan gum, olive emulsified wax and LES.

According to one side, the surfactant may be from 0.01% by volume to 10% by volume of the airgel paste.

On the other hand, the method of manufacturing a hydrophilic airgel according to an embodiment of the present invention, preparing a hydrophobic airgel; And sintering the hydrophobic airgel to produce a hydrophilic airgel.

According to one side, the sintering may be performed for 1 to 24 hours at a temperature of 300 ℃ to 500 ℃.

According to one side, through the sintering, the alkyl group (-CH ₃ ) of the hydrophobic airgel represented by the following [Formula 2] is removed, a hydrophilic airgel represented by the following [Formula 1] can be formed.

[Formula 1]

≡ Si-OH,

[Formula 2]

≡ Si-R

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).

On the other hand, the method for producing a mixed composition comprising a hydrophilic airgel and a hydrophobic airgel according to an embodiment of the present invention, preparing a hydrophobic airgel; And sintering the hydrophobic airgel to prepare a hydrophilic airgel. If all of the hydrophobic airgels are converted to hydrophilic airgels, the hydrophobic airgel may further include adding a hydrophobic airgel.

[Formula 1]

≡ Si-OH,

[Formula 2]

≡ Si-R

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).

According to the embodiment of the present invention, the manufacturing process can be simplified by manufacturing the hydrophobic airgel into a mixed composition including both hydrophilicity and hydrophobicity by a process of sintering at an elevated temperature.

In addition, according to an embodiment of the present invention, when the airgel paste prepared by the mixed composition has an excellent airgel porosity, for example, when manufactured as a cosmetic product, etc., it may have a high heat shielding performance and may contain oil and water together with good quality. Cosmetic products etc. can be manufactured.

1 is a flow chart of a method of producing a mixed composition and a method of manufacturing a cosmetic product therethrough according to an embodiment of the present invention.

FIG. 2 is a block diagram schematically illustrating a process of preparing the mixed composition shown in FIG. 1 and a process of manufacturing the airgel paste and the cosmetic product therefrom.

Figure 3 is a flow chart of a method for producing a mixed composition and a method for producing a cosmetic product according to another embodiment of the present invention.

FIG. 4 is a block diagram schematically illustrating a process of preparing the mixed composition shown in FIG. 3 and a process of manufacturing the airgel paste and the cosmetic product therefrom.

5 is a graph showing the change in hydrophobicity and hydrophilicity of the airgel with temperature and sintering time.

Figure 6 is a graph comparing the water evaporation amount of the moisture cream mixed with the normal moisture cream and the airgel paste of the present embodiment.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the configuration and application according to an embodiment of the present invention. The following description is one of several aspects of the patentable invention and the following description forms part of the detailed description of the invention.

However, in describing the present invention, a detailed description of known functions or configurations will be omitted for clarity of the gist of the present invention.

The hydrophobic airgel, hydrophilic airgel and the mixed composition described below may have a powder form. However, the present invention is not limited thereto.

1 is a flow chart of a method for producing a mixed composition having both hydrophilicity and hydrophobicity and a method for producing a cosmetic product through the same according to an embodiment of the present invention, Figure 2 is provided with both hydrophilicity and hydrophobicity shown in FIG. A block diagram schematically illustrating a process for preparing a mixed composition and a process for preparing an airgel paste and a cosmetic product through the same.

1 and 2, a method for preparing a mixed composition having both hydrophilicity and hydrophobicity and an airgel paste and a method for manufacturing a cosmetic product according to an embodiment of the present invention include preparing a hydrophobic airgel 110. After sintering in the prepared hydrophobic airgel 110 to prepare a hydrophilic airgel 120 to prepare a hydrophilic airgel 120, and mixed hydrophobic airgel 110a to the prepared hydrophilic airgel 120 to prepare a mixed composition 100 To prepare a mixture composition step (S120), the airgel paste manufacturing step (S130) to produce aerogel paste 130 by mixing a solvent, a thickener in the prepared mixture composition 100, the airgel paste 130 for cosmetic It may include a cosmetic product manufacturing step (S140) to manufacture a product 150.

Referring to each step, first, the hydrophilic airgel manufacturing step (S110) of the present embodiment, as shown in Figures 1 and 2, by sintering the hydrophobic airgel 110 using a sintering apparatus (not shown) hydrophilic characteristics This is a step of manufacturing the given hydrophilic airgel 120.

Hydrophobic airgel 110 includes an alkyl group (CH ₃ ). Therefore, the hydrophobic airgel 110 has a larger particle size, smaller pore volume, and smaller pore surface area than the hydrophilic airgel. In other words, as the alkyl group (CH ₃ ) is oxidized, a hydroxyl group is formed, and as the size of the reactor becomes smaller, the size of the airgel particles becomes smaller, and the pore volume and the surface area of the pores become wider. Therefore, the space for absorbing moisture is increased to increase the hydrophilicity.

In the hydrophilic airgel manufacturing step (S110), the sintering process is performed at an elevated temperature to remove the alkyl group from the hydrophobic airgel 110, thereby modifying the surface characteristics of the hydrophilic airgel 120.

The hydrophilic airgel manufacturing step (S110) may include a temperature raising step for allowing the hydrophobic airgel 110 to be in an elevated state, and a sintering step of sintering the hydrophobic airgel 110 to produce the hydrophilic airgel 120.

Here, in the temperature increase step, it is possible to increase the temperature to a temperature of 300 to 500 ℃ using an electric furnace (not shown), so that there is a hydrophobic airgel 110 under this temperature state. Then, the alkyl group and the residual water are removed from the hydrophobic airgel 110 to modify the surface properties of the hydrophilic airgel 120. The hydrophilic airgel 120 has a smaller particle size than the hydrophobic airgel 110.

In addition, due to the reduced particle size, space is created, which increases the pore volume and the pore surface area, which may ultimately increase the hydrophilicity.

[Formula 1] of the hydrophobic airgel 110 including the alkyl group and [Formula 2] of the hydrophilic airgel 120 from which the alkyl group is removed (CH ₃ -free) is as follows.

[Formula 1]

≡ Si-R

[Formula 2]

≡ Si-OH

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms)

In other words, the hydrophilic airgel 120 may be prepared by converting a functional group from an alkyl group to a hydroxyl group through the sintering of the hydrophobic airgel 110.

Meanwhile, during the sintering step, the hydrophobic airgel 110 may be modified into the hydrophilic airgel 120 by the sintering apparatus (not shown) while maintaining the aforementioned temperature state for 1 to 24 hours.

On the other hand, the mixed composition manufacturing step (S120) of the present embodiment, as shown in Figure 2, by mixing the hydrophobic airgel 110a to the hydrophilic airgel 120 prepared by the hydrophilic airgel manufacturing step (S110) mixing device (not shown Si) to prepare a mixed composition 100 with both hydrophilicity and hydrophobicity. In other words, some of the hydrophobic airgel 110 may be modified surface properties of the hydrophilic airgel 120 by sintering during the hydrophilic airgel manufacturing step (S110) described above, the other part of the hydrophilic airgel (110a) It may be mixed in the airgel 120.

Here, the hydrophilic airgel 120 and the hydrophobic airgel 110 may be manufactured in a set volume ratio. For example, the volume ratio of the hydrophilic airgel 120 and the hydrophobic airgel 110 may be 3: 7 to 7: 3, and the desired properties of hydrophilicity and hydrophobicity may be further given by selective adjustment within this volume ratio range. have. In the case of the former, the hydrophobicity may be further imparted in the mixed composition 100, and in the latter case, hydrophilicity may be further imparted. In addition, the mixing composition may be mixed for about 1 to 2 minutes to prepare the mixed composition 100.

On the other hand, the airgel paste manufacturing step (S130) of the present embodiment, as shown in Figure 2, the airgel paste 130 by mixing a solvent, a thickener in the mixed composition 100 prepared in the mixed composition manufacturing step (S120) Manufacturing step. Here, the solvent, the thickener may be mixed in the mixed composition 100 in a set ratio, wherein the bonding ratio or the mixing time of the solvent, the thickener may be selectively set according to the amount of the mixed composition 100 and the use of the manufactured product. have.

In other words, the solvent to be mixed in the mixed composition 100 may be an alcohol such as water (purified water) or ethanol or a mixture thereof, and may be mixed in a proportion set in the mixed composition 100.

A thickener in the mixed composition 100 may also control the viscosity of the airgel paste 130 prepared by mixing at a set ratio. That is, the viscosity of the airgel paste 130 can be selectively adjusted according to the mixing ratio of the thickener. However, in order to control the viscosity, a binder may be applied instead of a thickener. The binder can be used instead of thickener because it is cohesive and adhesive and suitable for bonding materials.

For example, to prepare the airgel paste 130, the mixed composition 100 may occupy 0.001 to 10% by volume. And the solvent may comprise from 40 to 60% by volume. The thickener may also comprise from 1 to 25% by volume. In addition, the moisturizing agent may occupy 1 to 20% by volume, preservatives may occupy 0.01 to 3% by volume, and the surfactant may occupy 0.01 to 10% by volume. However, the content of the solvent, the thickener, the moisturizer, the preservative, or the surfactant is not limited thereto, and may be mixed in different ratios.

The above-mentioned thickener may have components such as cellulose, hydroxypropyl cellulose, gelatin, methyl cellulose, carbomer, sodium carboxy methyl cellulose, guar gum, stearic acid, polyvinyl alcohol, collagen, mannan and carrageenan.

The aforementioned moisturizing agent may be composed of one or more of glycerin, propylene glycol, ethylene glycol, butylene glycol, dipropylene glycol, pentylene glycol, hexylene glycol or sorbitol.

And the preservative as a functional additive may be made of one or more of phenoxy ethanol, methyl paraben, ethyl paraben, mineral oil, isopropyl alcohol or natural preservative.

The surfactant may also consist of one or more of cocobetaine, lecithin, xanthan gum, olive emulsified wax or LES.

On the other hand, the cosmetic product manufacturing step (S140) of the present embodiment, as shown in Figure 2, by applying the airgel paste 130 prepared in the airgel paste manufacturing step (S130) to a thin, flexible material for cosmetics in the form of a pack It is a step of manufacturing a cosmetic product 150 that is made of the product 150 or directly applied to the skin. As a thin and flexible material, paper, vinyl, nonwoven fabric, etc. may be applied, but is not limited thereto.

In the case of the cosmetic product 150 manufactured by the cosmetic product manufacturing step (S140), since the airgel porosity is made of the airgel paste 130 having excellent porosity, high heat shielding properties can be expected while containing both oil and water. have.

As such, according to an embodiment of the present invention, the manufacturing process may be simplified by manufacturing the mixed composition 100 by a single process of heating and sintering the hydrophobic airgel 110.

In addition, when the airgel paste 130 made of the mixed composition 100 has an excellent airgel porosity, for example, when manufactured as a cosmetic product 150, etc., the airgel paste 130 may contain oil and water together with high heat shielding performance. There is an advantage that can produce a quality cosmetic product 150 and the like.

Hereinafter, a method of preparing a mixed composition and a method of manufacturing a cosmetic product through the same according to another embodiment of the present invention will be described, but the description thereof will be omitted for parts substantially the same as the configuration of the above-described embodiment.

Figure 3 is a flow chart of a method for producing a mixed composition and a method for producing a cosmetic product through the same according to another embodiment of the present invention, Figure 4 is a process for producing a mixed composition and airgel paste and cosmetics through the same shown in Figure 3 A block diagram schematically illustrating the process of manufacturing a product.

As shown in Figure 3 and 4, the method for producing a mixed composition according to another embodiment of the present invention and a method for producing aerogel paste and cosmetic products through the same, as in the above-described embodiment, S210), the airgel paste manufacturing step (S220), and a cosmetic product manufacturing step (S230) may be included. By the way, in the other steps and the above-described embodiment is substantially the same, there is a difference in the mixed composition manufacturing step (S210).

3 and 4, in the step of preparing the mixed composition of the present embodiment (S210), only the hydrophobic airgel of the entire hydrophobic airgel 210 is sintered to prepare the mixed composition 200 to which both hydrophilicity and hydrophobicity are given. It's a step.

Referring to Figure 1, the hydrophilic airgel manufacturing step (S110) and the mixed composition manufacturing step (S120) of the above-described embodiment, the hydrophobic airgel 110 to sinter the hydrophilic airgel 120 to form a hydrophobic airgel 110a ) Is mixed to prepare the mixed composition 100, whereas in this embodiment, only a part of the total hydrophobic airgel 210 is sintered to prepare the mixed composition 200.

Here, by sintering the hydrophobic airgel 210 by the sintering apparatus for 1 hour to 24 hours in a state where the temperature is raised to a temperature of 300 to 500 ℃ using an electric furnace, the alkyl group and the remaining water in the hydrophobic airgel 210 can be partially removed. In this case, the mixed composition 200 may be prepared.

In other words, even if a plurality of hydrophobic airgels 210 including an alkyl group, some of the alkyl groups are removed to modify the surface properties of the hydrophilic airgel containing the hydroxyl group.

As such, only a part of the hydrophobic airgels 210 may be hydrophilic and surface properties thereof may be modified, while others may remain hydrophobic airgels, thereby preparing a mixed composition 200 including both hydrophilicity and hydrophobicity.

The mixed composition 200 thus prepared may be manufactured as the airgel paste 230 by the airgel paste manufacturing step (S220) as in the above-described embodiment, and may be made by the cosmetic product manufacturing step (S230). It may be made of a product 250.

Meanwhile, the degree of hydrophilicity or hydrophobicity according to the sintering time may be determined through FIG. 5. It can be seen that as the sintering time increases, the hydrophobicity decreases and the hydrophilicity increases. By using this principle, when the hydrophobic airgel 110 is sintered at an elevated temperature in the hydrophilic airgel manufacturing step (S110) of the above-described embodiment, the hydrophilic airgel 120 may be manufactured.

On the other hand, when sintering only a part of the total hydrophobic airgel 210 by the sintering apparatus in the mixed composition manufacturing step (S210) of another embodiment described above it is possible to produce a mixed composition having both hydrophilicity and hydrophobicity.

On the other hand, Figure 6 is a graph comparing the moisture evaporation amount of the moisture cream mixed with the normal moisture cream and the airgel paste of the present embodiment.

As shown therein,

cosmetic products

150 and 250, for example, moisture creams prepared using airgel pastes 130 and 230 made from the

mixed compositions

100 and 200 of the present embodiment, are compared to general moisture creams. It can be seen that it has a low moisture evaporation amount through which the cosmetic product (150, 250) manufactured with the mixed composition (100, 200) can have an excellent moisture retention performance.

In the above-described embodiment, the case where the mixed composition is made of an airgel paste and the airgel paste is made of a cosmetic product such as a pack or a cream is described above, but the application field of the mixed composition is not limited thereto.

On the other hand, the present invention is not limited to the described embodiments, it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

Claims

A hydrophilic airgel represented by the following [Formula 1].

[Formula 1]

≡ Si-OH
The method of claim 1,

The hydrophilic airgel is prepared by converting a functional group from an alkyl group to a hydroxyl group through the sintering of a hydrophobic airgel, the hydrophilic airgel is prepared through the sintering of a hydrophobic airgel, hydrophilic airgel.
A mixed composition comprising a hydrophilic airgel represented by the following [Formula 1] and a hydrophobic airgel represented by the following [Formula 2],

[Formula 1]

≡ Si-OH,

[Formula 2]

≡ Si-R

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
The method of claim 3,

In the mixed composition, the volume ratio of the hydrophilic airgel and the hydrophobic airgel is 3: 7 to 7: 3, the mixed composition.
The method of claim 3,

The hydrophilic airgel is a mixed composition of any one of claims 1 to 3 of the hydrophilic airgel.
Hydrophilic airgel represented by the following [Formula 1];

Hydrophobic airgel represented by the following [Formula 2]; And

Comprising a solvent,

Airgel paste,

[Formula 1]

≡ Si-OH,

[Formula 2]

≡ Si-R

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
The method of claim 6,

The hydrophilic airgel is an airgel paste of any one of claims 1 to 3, the airgel paste.
The method of claim 6,

The mixing volume of the hydrophilic airgel and the hydrophobic airgel is 0.001% by volume to 10% by volume of the airgel paste,

The volume ratio of the hydrophilic airgel and the hydrophobic airgel is 3: 7 to 7: 3, airgel paste.
The method of claim 6,

The solvent is in the group consisting of purified water, alcohol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylglycol oil, glycerol aliphatic ester, polyethylene glycol, fatty acid ester of sorbitan An airgel paste comprising at least any one selected.
The method of claim 6,

Airgel paste, wherein the solvent is 40% to 60% by volume of the airgel paste.
The method of claim 6,

An airgel paste, further comprising a thickening material.
The method of claim 11,

The thickener is an aerogel comprising at least one selected from the group consisting of cellulose, hydroxypropyl cellulose, gelatin, methylcellulose, carbomer, sodium carboxymethyl cellulose, guar gum, stearic acid, polyvinyl alcohol, collagen, mannan and carrageenan Paste.
The method of claim 11,

The thickener is an airgel paste of 1% by volume to 25% by volume of the airgel paste.
The method of claim 6,

An airgel paste further comprising at least one of a humectant, a surfactant, and a preservative.
The method of claim 14,

The moisturizing agent contains at least one selected from the group consisting of glycerin, propylene glycol, ethylene glycol, butylene glycol, dipropylene glycol, pentylene glycol, hexylene glycol and sorbitol, airgel paste.
The method of claim 14,

The moisturizing agent, 1% by volume to 20% by volume of the airgel paste, airgel paste.
The method of claim 14,

The preservative is an airgel paste containing at least one selected from the group consisting of phenoxyethanol, methyl paraben, ethyl paraben, mineral oil, isopropyl alcohol and natural preservatives.
The method of claim 14,

The preservative is an airgel paste of 0.01% by volume to 3% by volume of the airgel paste.
The method of claim 14,

The surfactant is at least one selected from the group consisting of coco betaine, lecithin, xanthan gum, olive emulsified wax and LES, airgel paste.
The method of claim 14,

The surfactant is an airgel paste of 0.01% by volume to 10% by volume of the airgel paste.
Preparing a hydrophobic airgel; And

Sintering the hydrophobic airgel to prepare a hydrophilic airgel;

Comprising a method for producing a hydrophilic airgel.
The method of claim 21,

The sintering is carried out for 1 hour to 24 hours at a temperature of 300 ℃ to 500 ℃, a method for producing a hydrophilic airgel.
The method of claim 21,

Through the sintering, the alkyl group (-CH 3 ) of the hydrophobic airgel represented by the following [Formula 2] is removed, to form a hydrophilic airgel represented by the following [Formula 1], a method for producing a hydrophilic airgel,

[Formula 1]

≡ Si-OH,

[Formula 2]

≡ Si-R

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
The method of claim 21,

The hydrophilic airgel is a hydrophilic airgel of any one of claims 1 to 3, wherein the method of producing a hydrophilic airgel.
Preparing a hydrophobic airgel; And

Sintering the hydrophobic airgel to prepare a hydrophilic airgel;

Including,

If all of the hydrophobic airgel is converted to a hydrophilic airgel further comprises the step of adding a hydrophobic airgel,

A method of making a mixed composition comprising a hydrophilic airgel and a hydrophobic airgel.
The method of claim 25,

Through the sintering, the alkyl group (-CH 3 ) of the hydrophobic airgel represented by the following [Formula 2] is removed, to form a hydrophilic airgel represented by the following [Formula 1], the method for producing a mixed composition,

[Formula 1]

≡ Si-OH,

[Formula 2]

≡ Si-R

(Wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
The method of claim 25,

The hydrophilic airgel is a hydrophilic airgel of any one of claims 1 to 3, wherein the method for producing a mixed composition.