KR102094581B1 - Composition for hydrophobic and UV curable thin film and hydrophobic thin film made from the same - Google Patents

Abstract

The present invention relates to a composition for a thin film excellent in water repellency and capable of UV curing, and a water repellent thin film prepared therefrom. Specifically, the present invention has excellent water repellency at a contact angle of 150 ° or more and excellent self-cleaning ability at a sliding angle of water of 10 ° or less, and excellent durability. Thus, the water repellency and / or self-cleaning ability due to physical damage from the outside can be suppressed or minimized, and the self-recovery ability to recover from the water-repellent and / or self-cleaning ability reduced by physical / chemical damage (self) -Healing), and transparency that is in trade-off with water repellency and / or self-cleaning ability can be maintained at 80% or more, and furthermore, it can be manufactured simply and quickly, reducing manufacturing cost and The present invention relates to a composition for a water-repellent thin film capable of forming a water-repellent thin film applicable to an area and a water-repellent thin film prepared therefrom.

Description

Composition for hydrophobic and UV curable thin film and hydrophobic thin film made from the same}

The present invention relates to a composition for a thin film excellent in water repellency and capable of UV curing, and a water repellent thin film prepared therefrom. Specifically, the present invention has excellent water repellency at a contact angle of 150 ° or more and excellent self-cleaning ability at a sliding angle of water of 10 ° or less, and excellent durability. Thus, the water repellency and / or self-cleaning ability due to physical damage from the outside can be suppressed or minimized, and the self-recovery ability to recover from the water-repellent and / or self-cleaning ability reduced by physical / chemical damage (self) -Healing), and transparency that is in trade-off with water repellency and / or self-cleaning ability can be maintained at 80% or more, and furthermore, it can be manufactured simply and quickly, reducing manufacturing cost and The present invention relates to a composition for a water-repellent thin film capable of forming a water-repellent thin film applicable to an area and a water-repellent thin film prepared therefrom.

In the recent material industry, the surface modification technology of a material that can effectively control the wetting behavior of a liquid is very important. In particular, superhydrophobic coatings have excellent water repellency and self-cleaning ability, such as being applied to building exterior walls where the surface of the material is cleaned by itself by falling rain, liquid crystal materials for cell phones without fingerprints, solar panels, electronic devices, smart windows, etc. It has been receiving long attention due to its various applicability.

However, the conventional super water-repellent coating has a low durability, so that water repellency and self-cleaning ability is reduced by physical damage from the outside, and water repellency and self-cleaning ability are lost or decreased by chemical damage by UV irradiation. There is.

In addition, the conventional super water-repellent coating is reduced in transparency by scattering or reflecting light due to increased surface roughness in order to realize water repellency, applications requiring transparency, for example, glass windows, automobile glass, solar panel glass, There is a limit to the application to mobile phone liquid crystals.

Furthermore, conventional super water repellent coatings are used to control water repellency and transparency in trade off by using top-down methods including lithography, plasma etching, and vacuum deposition. Although studies have been conducted, these methods have limitations in the production of superhydrophobic surfaces due to the difficulty of large-scale area due to the limited productivity and limited size of the substrate by expensive vacuum equipment and lithography equipment.

In order to overcome these limitations, studies were conducted in various groups to develop superhydrophobic surfaces using silica nanoparticle assembly and a bottom-top method using sol-gel chemistry. And since the printing method can be applied, the manufacturing cost of the coating is reduced and the mass production is possible. However, a complicated preparation process for realizing a high contact angle to the water of the coating is required, and the high transmittance and superhydrophobicity are satisfied. There is a disadvantage that it is difficult to accurately control the surface roughness.

Therefore, the present invention is excellent in water repellency at a contact angle of 150 ° or more, and excellent in self-cleaning at a sliding angle of water of 10 ° or less, and also excellent in durability. Self-recovery (self-recovery), in which a decrease in water repellency and / or self-cleaning ability due to physical damage from the outside can be suppressed or minimized, as well as water-repellent and / or self-cleaning ability reduced by physical / chemical damage can be recovered. Healing), and transparency that is in trade-off with water repellency and / or self-cleaning ability can be maintained at 80% or more, and furthermore, it can be manufactured simply and quickly, reducing manufacturing cost and large area There is an urgent need for a composition for a water-repellent thin film capable of forming a water-repellent thin film and a water-repellent thin film prepared therefrom.

The present invention is to provide a composition for a water-repellent thin film having excellent water repellency at a contact angle of 150 ° or more, and excellent self-cleaning with a sliding angle of water of 10 ° or less. The purpose.

In addition, the present invention is excellent in durability, so that a decrease in water repellency and / or self-cleaning ability due to physical damage from the outside can be suppressed or minimized, and water-repellent and / or self-cleaning ability reduced by physical / chemical damage is recovered. An object of the present invention is to provide a composition for a water repellent thin film having self-healing ability.

And, an object of the present invention is to provide a composition for a water-repellent thin film that can be maintained at 80% or more of transparency in a trade off relationship with the water-repellent and / or self-cleaning ability.

Furthermore, an object of the present invention is to provide a composition for a water-repellent thin film that can be manufactured simply and quickly, thereby reducing manufacturing cost and applicable to a large area.

In order to solve the above problems, the present invention,

As a composition for a water-repellent thin film, comprising a dispersion medium and a dispersoid, the dispersoid includes metal nanoparticles, and the surface of the metal nanoparticles is formed by self-assembled monomolecular films (SAMs) having hydrophobic functional groups and hydrophilic functional groups. To provide a composition for a water-repellent thin film.

Here, the hydrophobic functional group includes a hydrocarbon group or a fluorine group, the hydrophilic functional group provides a composition for a water-repellent thin film, characterized in that it comprises at least one selected from the group consisting of hydroxy group, carboxyl group and acrylate group.

In addition, the hydrophobic functional group includes a hydrocarbon group, and the ratio of the hydrophobic functional group and the hydrophilic functional group is 7: 3 or more, to provide a composition for a water-repellent thin film.

On the other hand, the hydrophobic functional group includes a fluorine group, and the ratio of the hydrophobic functional group and the hydrophilic functional group is 5: 5 or more, to provide a composition for a water-repellent thin film.

In addition, the self-assembled monomolecular film is formed by coordinating octadecylphosphonic acid (ODPA) and phosphonic acid 2-hydroxymethacrylate ester (PHME) to the surface of the metal nanoparticles. It provides a composition for water-repellent thin film, characterized in that.

On the other hand, the self-assembled monolayer is 1H, 1H, 2H, 2H-perfluorooctanephosphonic acid (1H, 1H, 2H, 2H-Perfluorooctanephosphonic acid; HDF-PA) and phosphonic acid 2-hydroxymethacrylate ester (Phosphoric It provides a composition for a water-repellent thin film, characterized in that the acid 2-Hydroxyethylmethacrylate ester (PHME) is formed by coordination bonding to the surface of the metal nanoparticles.

Furthermore, it provides a composition for a water-repellent thin film, further comprising 1,6-hexanediol diacrylate (HDDA).

Here, it provides a composition for a water repellent thin film, characterized in that it further comprises a photoinitiator.

In addition, the metal nanoparticles, characterized in that it comprises aluminum oxide nanoparticles, provides a composition for a water-repellent thin film.

On the other hand, the composition for coating a water-repellent thin film on a substrate and then cured to provide a water-repellent thin film.

The composition for a water repellent thin film according to the present invention has a contact angle with water of 150 ° or more by precisely controlling the surface roughness of the thin film by forming a micro / nano layer structure in the thin film by two or more nanoparticles having different particle diameters As it is excellent in water repellency and the sliding angle of water is 10 ° or less, it exhibits an excellent effect of self-cleaning.

In addition, the composition for a water-repellent thin film according to the present invention improves the durability of a thin film by forming self-assembled monomolecular films (SAMs) having two specific functional groups on a nanoparticle surface in a specific ratio, thereby improving water repellency and / or water damage due to physical damage from the outside. Not only can the reduction of self-cleaning ability be suppressed or minimized, but also exhibit the excellent effect of retaining the self-healing ability to recover the water-repellent and / or self-cleaning ability reduced by physical / chemical damage. .

In addition, the composition for a water-repellent thin film according to the present invention exhibits an excellent effect of maintaining a transparency that is in conflict with the water-repellent and / or self-cleaning ability at 80% or more through precise control of the surface roughness of the thin film.

Furthermore, the composition for a water-repellent thin film according to the present invention can easily and quickly form a thin film in a bottom-up manner, thereby reducing the manufacturing cost of the thin film and exhibiting an excellent effect that can be applied to a large area.

1 schematically shows a state in which self-assembled monomolecular films (SAMs) in which two functional groups are introduced at various ratios are formed on the surface of nanoparticles included in the composition for a water-repellent thin film according to the present invention.
Figure 2 schematically shows a method of manufacturing an embodiment of the composition for a water-repellent thin film according to the present invention and a method of forming a water-repellent thin film therefrom.
Figure 3 is a graph showing the results of evaluating the self-healing ability of the water-repellent thin film in Examples.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete, and that the spirit of the present invention is sufficiently conveyed to those skilled in the art.

The present invention relates to a composition for a water-repellent thin film in which self-assembled monomolecular films (SAMs) having a hydrophobic functional group and a hydrophilic functional group in a specific ratio are formed, including nanoparticles as a dispersion medium and a dispersion medium dispersed therein.

Here, the dispersion medium is not particularly limited as long as it can be used as a dispersion medium for a transparent thin film, for example, water, methanol, ethanol, propanol, isopropanol, isopropyl acetate, butanol, 2-butanol, octanol, 2-ethylhexanol , Pentanol, benzyl alcohol, hexanol, 2-hexanol, cyclohexanol, terpineol, nonanol, methylene glycol, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, ethylene glycol monomethyl ether, Ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol Monobutyl ether, 2-propanone, diacetyl, acetylacetone, 1,2-diacetylethane, dime Selected from the group consisting of carbonate, diethyl carbonate, propylene glycol methyl ether acetate, 2-methoxyethyl acetate, propylene glycol monomethyl ether, N-methyl-2-pyrrolidone, N-methylacetamide, mixtures thereof, and the like. It may contain one or more solvents, preferably isopropanol.

When the water repellent film is formed from the composition according to the present invention, the dispersion material has excellent water repellency and a sliding angle of water having a contact angle to water of 150 ° or more by allowing the thin film to have precisely controlled surface roughness. ) Implements an excellent self-cleaning ability of 10 ° or less, while maintaining a transparency that is in conflict with the water repellency and / or self-cleaning ability at 80% or more.

The dispersoid is not particularly limited as long as it can implement surface roughness for water repellency of the thin film, and metal nanoparticles, for example, metal oxides, particularly aluminum oxide, antimony tin oxide, bismuth oxide, cerium oxide, cobalt oxide, copper oxide , Iron oxide, magnesium oxide, manganese oxide, nickel oxide, silicon oxide, titanium oxide, yttrium oxide, zinc oxide, zirconium oxide, or the like, and may include one or more metal oxides, preferably aluminum oxide.

Specifically, the dispersoid may include two or more dispersoids having different average particle diameters, preferably first nanoparticles having an average particle diameter of 21 to 50 nm and second nanoparticles having an average particle diameter of 1 to 20 nm. When the water-repellent thin film is formed from the composition according to the present invention, the first nanoparticles having a relatively large average particle diameter and a relatively large average particle diameter due to a relatively small average particle diameter are relatively large. It is arranged on the top, whereby a micro / nano layer structure such as a plurality of irregularities is formed on the thin film to retain precisely controlled surface roughness, resulting in excellent water repellency, self-cleaning ability, and transparency of the thin film. You can.

For example, the weight mixing ratio of the first nanoparticle and the second nanoparticle may be 1: 2 or more, particularly 1: 2 to 1: 3, and based on the total weight of the composition, the first nanoparticle The content is 1% by weight or more, and the content of the second nanoparticles may be 2% by weight or more. The surface roughness (rms) of the thin film formed from the composition by a specific weight mixing ratio of the first nanoparticles and the second nanoparticles may be 60 nm or more and less than 400 nm, preferably 60 to 160 nm.

The surface roughness (rms) of the thin film may greatly affect the water repellency and self-cleaning ability of the thin film. When the surface roughness (rms) of the thin film increases, the micro / nano layer which is an uneven structure on the rough surface of the thin film Since the amount of air present in the structure increases, the air contributes to minimizing the contact area of the surface of the thin film with water that can contact the surface of the thin film, and as a result, the water repellency and self-cleaning ability of the thin film is improved.

On the other hand, when the surface roughness (rms) of the thin film is increased, the water repellency and self-cleaning ability of the thin film is improved, while the transparency of the thin film is lowered. That is, when the surface roughness (rms) of the thin film is 400 nm or more, visible light having a wavelength of 400 to 800 nm does not pass through the thin film and is diffusely reflected on the surface of the thin film, thereby deteriorating the transparency of the thin film.

Accordingly, the composition for a water repellent thin film according to the present invention has an average particle diameter of which the first nanoparticles and the second nanoparticles described above are precisely controlled, and the precisely controlled mixing ratio of the first nanoparticles and the second nanoparticles. Through, by retaining the surface roughness of 60 to 160 nm as described above, as a result, the contact angle with water is 150 ° or more, the sliding angle of water is 10 ° or less, and the transparency can be realized with 80% or more.

FIG. 1 schematically shows a state in which self-assembled monomolecular films (SAMs) in which two functional groups are introduced at various ratios are formed on the surface of nanoparticles included in the composition for a water-repellent thin film according to the present invention.

As illustrated in FIG. 1, self-assembled monomolecular films (SAMs) having hydrophobic functional groups and hydrophilic functional groups in a specific ratio may be formed on the surface of nanoparticles (NP) such as aluminum oxide (Al ₂ O ₃ ). Here, the hydrophobic functional group may include a hydrocarbon group such as a methyl group (-CH ₃ ), a fluorine group (-F), and the like, and the hydrophilic functional group may include a hydroxy group, a carboxy group, an acrylate group, and the like. While the hydrocarbon group as the hydrophobic functional group has a low effect of realizing water repellency of the thin film compared to the fluorine group, it is advantageous in terms of maintaining transparency, whereas the fluorine group has an excellent effect of realizing water repellency of the thin film compared to the hydrocarbon group, but in terms of maintaining transparency. It is relatively unfavorable.

Specifically, the self-assembled monomolecular films (SAMs) having the hydrophobic functional group and the hydrophilic functional group are each of the compound having the hydrophobic functional group and the compound having the hydrophilic functional group, the surface of metal nanoparticles such as aluminum oxide (Al ₂ O ₃ ) It can be formed by coordination bonds.

For example, as shown in Figure 1, the self-assembled monolayer (SAMs) is octadecylphosphonic acid (octadecylphosphonic acid; ODPA) or 1H, 1H, 2H, 2H-perfluorooctanephosphonic acid (1H, 1H, 2H, 2H-Perfluorooctanephosphonic acid (HDF-PA) and phosphonic acid 2-hydroxymethacrylate ester (Phosphoric acid 2-Hydroxyethylmethacrylate ester; PHME) can be formed through self-assembly.

Specifically, the octadecylphosphonic acid (ODPA) or the 1H, 1H, 2H, 2H-perfluorooctanephosphonic acid (HDF-PA) is coordinated with metal nanoparticles such as aluminum oxide (Al ₂ O ₃ ) A hydrophobic group of a methyl group (-CH ₃ ) or a fluorine group (-F) is disposed at the opposite end of the terminal, and the phosphonic acid 2-hydroxymethacrylate ester (PHME) is the aluminum oxide (Al ₂ O ₃ ), The hydrophilic functional group of the acrylate group is disposed on the opposite end of the terminal that coordinates with the metal nanoparticles.

Here, the concentration of the compound having the hydrophobic functional group and the compound having the hydrophilic functional group may be 0.1 to 1 mmol, preferably 0.2 to 1 mmol, and when the hydrophobic functional group is a hydrocarbon group, the hydrophobic functional group and the hydrophilic functional group The ratio is 7: 3 or more, for example, 7: 3 to 10: 0, preferably 7: 3 to 9: 1, and when the hydrophobic functional group is a fluorine group, the ratio of the hydrophobic functional group to the hydrophilic functional group is 5: 5 The above may be, for example, 5: 5 to 10: 0, preferably 5: 5 to 9: 1.

When the ratio of the hydrophobic functional group and the hydrophilic functional group is less than the reference, the water repellency of the thin film may be less than the reference, whereas when the hydrophilic functional group is not included, the durability of the thin film may be significantly reduced.

Figure 2 schematically shows a method of manufacturing an embodiment of the composition for a water-repellent thin film according to the present invention and a method of forming a water-repellent thin film therefrom.

As shown in FIG. 2, the composition for a water-repellent thin film according to the present invention can be prepared by dispersing nanoparticles having self-assembled monomolecular films (SAMs) having hydrophobic and hydrophilic functional groups on a surface as a dispersing medium in a dispersion medium. In addition, a water-repellent thin film may be formed by spray coating the composition on a substrate and curing it through curing by UV irradiation.

In particular, when 1,6-hexanediol diacrylate (HDDA) is additionally added to the composition for water-repellent thin film, the 1,6-hexanediol diacrylate (HDDA) is irradiated during UV irradiation. The crosslinking reaction with each other or crosslinking reaction with the hydrophilic functional groups on the surface of the nanoparticles can further improve the durability of the water-repellent thin film formed from the composition.

Here, the concentration of the 1,6-hexanediol diacrylate (HDDA) may be 0.001 M or more, preferably 0.003 to 0.01 M. When the concentration of the 1,6-hexanediol diacrylate (HDDA) is less than 0.003 M, durability of the thin film may not be improved.

In addition, a photoinitiator may be additionally added to the composition for water repellent thin film for the crosslinking reaction, and the content of the photoinitiator is 0.05 to 1% by weight, preferably 0.1 to 1% by weight, based on the total weight of the composition. You can.

On the other hand, the hydrophobic functional groups included in the self-assembled monomolecular films (SAMs), in particular, hydrocarbon groups, self-healing to recover the water repellency and self-cleaning ability reduced by chemical damage of the thin film by UV irradiation on the thin film. ) Function.

Specifically, upon UV irradiation of the thin film, a polar group such as a hydroxyl group or a carboxyl group is introduced on the surface of the thin film, and as a result, the thin film becomes a hydrophilic surface having a low contact angle with water. When heated to the temperature of the hydrophobic functional groups, especially the hydrocarbon groups in the thin film is moved toward the surface to minimize the surface energy and the polar groups such as hydroxyl groups or carboxyl groups introduced as a result of rotation and movement of these hydrocarbon groups are It is hidden inside the thin film and the hydrocarbon group is exposed on the surface of the thin film, so that the water repellency and self-cleaning ability of the thin film can be restored again.

[Example]

1. Water-repellent thin film composition and thin film production example

After dispersing aluminum oxide nanoparticles (average particle diameter <20 nm) as 0.4 g / ml as a dispersion medium in isopropyl alcohol as a dispersion medium and dispersing for 30 minutes using an ultrasonic washer, octadecylphosphonic acid (ODPA) was obtained to be 0.2 mmol. ) Or 1H, 1H, 2H, 2H-perfluorooctanephosphonic acid (HDF-PA) and phosphonic acid 2-hydroxymethacrylate ester (PHME) are added to 1 ml of isopropyl alcohol, and this is a nanoparticle dispersion solution To, and dispersed in an ultrasonic cleaner for 10 minutes, further stirred at 60 ° C. for 3 hours, by removing excess ODPA, HDF-PA, PHME through centrifugation and washing with a large amount of isopropyl alcohol, a methyl group (-CH ₃₎ or self-assembled monolayer is hydrophobic group and a hydrophilic functional group of the acrylate groups of the fluorine (-F) is applied in various amounts as shown in Table 1 was applied to the surface of the nanoparticles, To prepare a composition for water-based thin film.

In addition, 0.2% by weight of self-assembled monomolecular films (SAMs) formed nanoparticles into 5 ml of isopropyl alcohol was added to the ultrasonic washer for 1 hour to redisperse the composition for the water repellent thin film before spray coating on the substrate. Then, 0.1% by weight of photoinitiator and 0.003 M HDDA were added, sprayed on a glass substrate (Corning 1737F glass) heated to 80 ° C. using an air sprayer (manufacturer: Sparmax Co., Ltd) for 40 seconds, and then 365 A water-repellent thin film is prepared by UV curing at room temperature for 1 hour using a UV lamp having a wavelength of nm (product name: TN-4LC).

ODPA: PHME HDF-PA: PHME Example 1 10: 0 Example 2 9: 1 Example 3 7: 3 Comparative Example 1 5: 5 Comparative Example 2 3: 7 Comparative Example 3 1: 9 Comparative Example 4 0:10 Example 4 10: 0 Example 5 8: 2 Example 6 7: 3 Example 7 5: 5 Comparative Example 5 3: 7 Comparative Example 6 2: 8 Comparative Example 7 0:10

2. Property evaluation

1) Water repellency and self-cleaning ability evaluation

For each of the thin films of Examples and Comparative Examples, the contact angle to water and the slip angle of water were evaluated, respectively. The evaluation results are shown in Table 2 below.

Contact angle to water (°) Water slip angle (°) Example 1 155.8 (± 0.5) 2 Example 2 156.2 (± 0.5) 4 Example 3 155.3 (± 0.1) 6 Comparative Example 1 118.2 (± 0.4) NA Comparative Example 2 70.9 (± 0.3) NA Comparative Example 3 ~ 0 NA Comparative Example 4 ~ 0 NA Example 4 154.6 (± 0.5) ~ 0 Example 5 160.1 (± 0.4) ~ 0 Example 6 159.2 (± 0.5) 4 Example 7 160.4 (± 0.4) 6 Comparative Example 5 147.2 (± 0.3) NA Comparative Example 6 116.5 (± 0.8) NA Comparative Example 7 ~ 0 NA

NA: Measurement not possible

As shown in Table 2, the thin films formed from the compositions of Examples 1 to 7 in which the ratio of the hydrophobic functional group and the hydrophilic functional group in the self-assembled monomolecular films (SAMs) on the nanoparticle surface satisfy the criterion have a contact angle of 150 ° with respect to water. It was confirmed that the excellent water repellency was exceeded and the self-cleaning ability was excellent because the slip angle of water was less than 10 °.

On the other hand, the thin films formed from the compositions of Comparative Examples 1 to 7 in which the ratio of the hydrophobic functional group and the hydrophilic functional group is less than the standard, the contact angle to water is not significantly higher than 150 °, the water repellency is insufficient, and the sliding angle of water greatly exceeds 10 °. Since it was impossible to measure, it was confirmed that the self-cleaning ability was insignificant.

2) Durability evaluation

The contact angles of the water before and after the surfaces of the water-repellent thin films of Examples 1 to 3 and Comparative Examples 1 to 4 were sonicated for 1 minute. The measurement results are shown in Table 3 below.

Before sonication
Contact angle to water (°) After sonication
Contact angle to water (°) Example 1 156.3 137.8 Example 2 156.2 130.2 Example 3 155.3 153.6

As shown in Table 3, the thin films formed from the compositions of Examples 1 to 3 in which the ratio of the hydrophobic functional group to the hydrophilic functional group in the self-assembled monomolecular films (SAMs) on the nanoparticle surface satisfies the criteria are excellent in durability, resulting in ultrasonic treatment. It has been found that water repellency is maintained as much as possible despite physical damage.

3) Evaluation of self-healing ability

In order to confirm the self-healing ability due to chemical damage of the water-repellent thin film of Example 3, intentionally damage the thin film using UV Ozone cleaner (UVO), modify the hydrophilic property, and then heat it to a temperature of 150 ° C. to make it hydrophobic again. The contact angle to the water of the thin film was measured each time while repeating the self-healing process to recover 10 times. The measurement results are as shown in FIG. 5.

As shown in Fig. 3, the water-repellent thin film of Example 3 is heated to water again even when the contact angle with water is significantly reduced due to the introduction of polar groups such as hydroxyl groups or carboxyl groups on the surface due to chemical damage. It was confirmed that the contact angle has a self-healing ability to recover.

Although this specification has been described with reference to preferred embodiments of the present invention, those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims set forth below. You can do it. Therefore, if the modified implementation basically includes the components of the claims of the present invention, it should be considered that all are included in the technical scope of the present invention.

Claims (10)

A composition for a water repellent thin film,
Dispersing medium and dispersing properties,
The dispersoid includes metal nanoparticles,
On the surface of the metal nanoparticles, self-assembled monomolecular films (SAMs) having hydrophobic and hydrophilic functional groups are formed,
The self-assembled monomolecular film is formed by coordinating octadecylphosphonic acid (ODPA) and phosphonic acid 2-Hydroxyethylmethacrylate ester (PHME) to the surface of the metal nanoparticles. , 1H, 1H, 2H, 2H-perfluorooctanephosphonic acid (1H, 1H, 2H, 2H-Perfluorooctanephosphonic acid; HDF-PA) and phosphonic acid 2-Hydroxyethylmethacrylate ester; PHME) is formed by coordinating the surface of the metal nanoparticles,
When the self-assembled monomolecular film is formed by coordinating octadecylphosphonic acid (ODPA) and phosphonic acid 2-hydroxymethacrylate ester (PHME) to the surface of the metal nanoparticles The hydrophobic functional group includes a hydrocarbon group, the ratio of the number of the hydrophobic functional group and the hydrophilic functional group is 7: 3 to 9: 1,
The self-assembled monolayer is 1H, 1H, 2H, 2H-perfluorooctanephosphonic acid (1H, 1H, 2H, 2H-Perfluorooctanephosphonic acid; HDF-PA) and phosphonic acid 2-hydroxymethacrylate ester (Phosphoric acid 2 When the -Hydroxyethylmethacrylate ester (PHME) is formed by coordination bonding to the surface of the metal nanoparticles, the hydrophobic functional group includes a fluorine group, and the ratio of the number of the hydrophobic functional group and the hydrophilic functional group is 5: 5 to 9: 1. The composition for a water repellent thin film. delete delete delete delete delete According to claim 1,
It characterized in that it further comprises 1,6-hexanediol diacrylate (HDDA), water-repellent thin film composition. The method of claim 7,
Characterized in that it further comprises a photoinitiator, a composition for a water-repellent thin film. According to claim 1,
The metal nanoparticles, characterized in that it comprises aluminum oxide nanoparticles, water repellent thin film composition. A water-repellent thin film prepared by coating the composition for a water-repellent thin film of claim 1 on a substrate and then curing.

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