TW201947053A - Method for enhancing adhesion of anti-fouling film - Google Patents

Abstract

A method for enhancing adhesion of an anti-fouling film is described. In this method, a substrate is provided. A modification coating film is formed on a surface of the substrate, in which forming the modification coating film includes using a precursor, and the precursor includes silicon, carbon, and oxygen. The modification coating film is coated with anti-smudge molecules. A baking process is performed.

Description

   Method for improving adhesion of antifouling film   

The invention relates to a technique for manufacturing an antifouling film, and in particular, to a method for improving the adhesion of an antifouling film.

With the vigorous development of portable electronic devices, antifouling treatment has become one of the indispensable steps in the manufacturing process. Antifouling treatment has many uses. For example, antifouling treatment can provide the anti-fouling and anti-friction effects of touch panels of portable electronic devices, so as to maintain the appearance of portable electronic devices and extend the use of portable electronic devices Goal of life.

In antifouling treatment, a more common one is antifouling treatment for glass substrates. This antifouling treatment involves cleaning the glass substrate first, and then performing plasma treatment on the glass substrate, thereby forming a hydroxyl group (-OH) functional group on the surface of the glass substrate. Next, the surface of the glass substrate was coated with fluorine-containing siloxane. Subsequently, a baking treatment is performed to form a bond between the fluorine-containing siloxane and the hydroxyl functional group on the surface of the glass substrate, and a single-molecule antifouling coating is formed on the surface of the glass substrate, thereby completing the surface of the glass substrate. Antifouling treatment. This single-molecule antifouling coating hardly affects the original optical characteristics of the glass substrate. Although the antifouling coating obtained in this way has the advantage of not affecting the appearance of the substrate, it is currently only applied to glass, and the effect is not good when applied to substrates made of other materials.

Another antifouling treatment method is to use a polymer mixed with fluorine-containing molecules to make a transparent polymer coating, and then coat this transparent polymer coating on glass or other substrates to form an antifouling film on the substrate. The substrate has antifouling effect. However, the thickness of the antifouling film formed by this method is relatively thick, usually several hundred nanometers or even micrometers (μm), which will seriously affect the glossiness and texture of the substrate.

Therefore, an object of the present invention is to provide a method for improving the adhesion of an antifouling film, which can be formed on a non-glass substrate or a substrate on which the surface to be coated does not have a silicon oxide (SiO _x ) layer. SiO _x ) -based modified coating. Thereby, a hydrogen-oxygen (-OH) functional group can be smoothly formed on the surface of the modified plating film. Antifouling molecules can bond with the hydroxyl functional groups on the surface of the modified coating film, and can form an antifouling film firmly attached to the modified coating film, thereby achieving the effect of improving the adhesion of the antifouling film to the substrate .

Another object of the present invention is to provide a method for improving the adhesion of an antifouling film. The modified plasma coating can be deposited by an atmospheric plasma process. Therefore, compared with a vacuum coating process, the method can greatly reduce the manufacturing cost.

Another object of the present invention is to provide a method for improving the adhesion of an antifouling film, which can be applied to a substrate with a complicated structure, and can be applied to the plating film of substrates of various materials, and has extremely wide applicability.

According to the above object of the present invention, a method for improving the adhesion of an antifouling film is proposed. In this method, a substrate is provided. The modified coating is formed on the surface of the substrate, and the precursor is used when forming the modified coating, and the precursor includes silicon carbon oxygen molecules. Coating antifouling molecules on the modified coating. Perform the baking process.

According to an embodiment of the present invention, the above substrate is a non-glass substrate, or a substrate having a coating surface without a silicon oxide (SiO _x ) layer.

According to an embodiment of the present invention, the forming of the modified coating film includes an atmospheric plasma deposition process, and the precursor includes a gas or a liquid.

According to an embodiment of the present invention, the modified coating film includes silicon oxide (SiO _x ).

According to an embodiment of the present invention, the modified coating film includes silicon dioxide, silicon oxide, and / or silicon oxycarbide.

According to an embodiment of the present invention, the forming of the modified coating film includes forming a plurality of hydrogen-based functional groups on the surface of the modified coating film.

According to an embodiment of the present invention, when the baking process is performed, the baking temperature is controlled to about 50 ° C to about 200 ° C.

According to an embodiment of the present invention, before forming the modified plating film, the above-mentioned method for improving the adhesion of the antifouling film further includes performing an atmospheric plasma cleaning treatment on the surface of the substrate.

According to an embodiment of the present invention, after the modified coating is formed, the method for improving the adhesion of the anti-fouling film further includes performing atmospheric plasma modification treatment on the modified coating to form a plurality on the surface of the modified coating. Hydroxyl functional groups.

According to an embodiment of the present invention, the thickness of the modified coating film is equal to or less than about 100 nm.

100‧‧‧ steps

110‧‧‧step

120‧‧‧ steps

130‧‧‧ steps

140‧‧‧step

150‧‧‧ steps

200‧‧‧ substrate

202‧‧‧ surface

210‧‧‧ Atmospheric plasma

220‧‧‧ Modified Coating

220t‧‧‧thickness

222‧‧‧ surface

230‧‧‧ Atmospheric Plasma

240‧‧‧ Hydroxyl functional group

250‧‧‧ antifouling molecules

260‧‧‧Antifouling film

In order to make the above and other objects, features, advantages, and embodiments of the present invention more comprehensible, the description of the attached drawings is as follows: [Fig. 1] An improved antifouling film according to an embodiment of the present invention [Fig. 2A] to [Fig. 2F] are sectional views showing a process for improving the adhesion of an antifouling film according to an embodiment of the present invention; and [Fig. 3] are drawings A columnar comparison chart of the results of abrasion resistance test of an antifouling film made by a method of manufacturing an antifouling film according to an embodiment of the present invention and an antifouling film made by a conventional method.

When the inventor uses a vacuum evaporation technology to plate an antifouling film on a glass surface, the cleaned glass substrate is first placed on a carrier fixture, and then the carrier fixture and the glass substrate thereon are placed in a vacuum chamber. Next, the surface of the glass substrate is cleaned with a plasma, and then a single-molecule antifouling film is formed on the surface of the substrate by a vacuum evaporation method. In order to improve the adhesion of the monomolecular antifouling film to the substrate, the inventor first coated a layer of silicon dioxide film on the surface of the substrate before evaporating the antifouling film, and then evaporated the monomolecular antifouling film on the silicon dioxide. Film. The inventors found that although such a coating process can form an antifouling film that does not affect the original optical characteristics of the substrate, and can also be applied to substrates other than glass, the cost of the vacuum evaporation process is relatively high, especially when the substrate area When it is larger, it is more uncompetitive in cost. In addition, for some substrates, vacuum processing is difficult, and the vacuum evaporation process is not suitable for coating on substrates with complicated structures, which limits its applicability.

In view of this, the inventor proposes a method for improving the adhesion of an antifouling film, which can form a modified coating on a non-glass substrate or a substrate without a silicon oxide layer on the surface to be coated, for example, by atmospheric plasma deposition. Many hydroxyl functional groups are formed on the modified coating film, so that the subsequent anti-fouling molecules can be bonded to these hydroxyl functional groups to form a solid anti-fouling film that is firmly attached to the modified coating film. Therefore, the method of the present invention can overcome the problem that the single-molecule antifouling layer is difficult to apply to substrates made of non-glass materials, and the application of the method can effectively improve the adhesion of the antifouling film to the substrate while greatly reducing the process cost. .

Please refer to FIG. 1 and FIGS. 2A to 2F. FIG. 1 is a flowchart illustrating a method for improving the adhesion of an antifouling film according to an embodiment of the present invention. FIGS. 2A to 2F are cross-sectional views of a process for improving the adhesion of an antifouling film according to an embodiment of the present invention. In this embodiment, step 100 is first performed to provide a substrate 200. As shown in FIG. 2A, the substrate 200 has at least one surface 202 to be coated. In some examples, the substrate 200 is a non-glass substrate, or a substrate having a surface 202 to be coated without a silicon oxide (SiO _x ) layer. For example, the substrate 200 may be a plastic substrate or a metal substrate, such as an aluminum alloy substrate, a chromium nitride (CrN) substrate, a stainless steel substrate, or a substrate plated with decorative chromium.

Next, in some examples, step 110 may be selectively performed to clean the surface 202 of the substrate 200 to be coated before coating. For example, as shown in FIG. 2B, an atmospheric plasma cleaning treatment may be performed on the surface 202 of the substrate 200 to use the atmospheric plasma 210 to clean oil and dirt on the surface 202 of the substrate 200. The plasma working gas used to form the atmospheric plasma 210 may be, for example, air, nitrogen (N ₂ ), or a combination of nitrogen and air or oxygen (O ₂ ), argon (Ar), or argon and air or oxygen. combination. For example, the atmospheric plasma 210 may be generated by using a spray plasma technology, a dielectric barrier discharge (DBD) plasma technology, or a high frequency (RF) plasma technology.

In some specific examples, when the substrate 200 has a clean surface 202, the above-mentioned step 110 may be omitted without first performing a cleaning process on the surface 202 of the substrate 200.

Next, step 120 is performed to form a modified plating film 220 covering the surface 202 of the substrate 200, as shown in FIG. 2C. Forming the modified coating film 220 may include using a precursor, and the precursor includes silicon carbon oxygen molecules. In some examples, the atmospheric plasma deposition process may be used to form the modified coating film 220. The precursor used in the atmospheric plasma deposition process includes a gas or liquid containing silicon carbon oxygen molecules. The modified coating film 220 is a glass-like layer, and may include a large amount of silicon oxide (SiO _x ). For example, the modified coating film 220 includes silicon dioxide, silicon oxide, and / or silicon oxycarbide. In some exemplary examples, the thickness 220t of the modified coating film 220 is equal to or less than about 100 nanometers to avoid affecting the original optical properties of the substrate 200. In addition, the modified plating film 220 may be formed by using a spray plasma deposition technology, an insulation barrier discharge plasma deposition technology, or a high-frequency plasma deposition technology. In the present invention, different precursors may be selected to improve the adhesion of the modified plating film 220 according to the material of the substrate 200.

Since the modified coating 220 is produced by an atmospheric plasma deposition process instead of a vacuum process, not only can the process cost be greatly reduced, but the optional substrate 200 material is also more yuan, and it can also be applied to complex structures. The substrate 200 has a wide range of applications.

As shown in FIG. 2D, in some examples, after the modified coating film 220 is formed, step 130 may be selectively performed to perform an atmospheric plasma modification treatment on the surface 222 of the modified coating film 220, and the atmospheric plasma 230 is used. A plurality of hydroxide functional groups 240 are formed on the surface 222 of the modified coating film 220 to activate the surface 222 of the modified coating film 220. The plasma working gas used to generate the atmospheric plasma 230 may be, for example, air, nitrogen, or a combination of nitrogen and air or oxygen, argon, or a combination of argon and air or oxygen. In some exemplary examples, spray plasma deposition technology, insulation barrier discharge plasma deposition technology, or high frequency plasma deposition technology may be used to perform atmospheric plasma modification treatment on the surface 222 of the modified coating film 220.

In some specific examples, in step 120, forming the modified coating film 220 may include forming a plurality of hydroxide functional groups 240 on the surface 222 of the modified coating film 220. In such an example, step 130 may be omitted in this embodiment, and it is not necessary to additionally perform atmospheric plasma modification treatment on the surface 222 of the modified coating film 220.

Since the modified coating film 220 is a glass-like layer, the atmospheric plasma modification treatment can generate more hydroxide functional groups on the surface 222 of the modified coating film 220. In this way, the surface 222 of the modified coating film 220 rich in oxygen functional groups is helpful for subsequent bonding with single-molecule antifouling molecules.

Please refer to FIG. 1 and FIG. 2E at the same time. After a plurality of hydroxide functional groups are formed on the surface 222 of the modified coating film 220, step 140 is performed to coat the antifouling molecules 250 on the surface 222 of the modified coating film 220. In some examples, the antifouling molecule 250 may include a fluorocarbon silane-based compound, a perfluorocarbon silane-based compound, a fluorocarbon silane-based compound, a perfluorosilane-based compound, or a perfluorosilane-based ether compound. As shown in FIG. 2E, the antifouling molecule 250 has a hydrogen-oxygen bond.

Subsequently, step 150 is performed to perform a baking process. Therefore, as shown in FIG. 2F, during the baking process, the hydrogen-oxygen bond of the anti-fouling molecule 250 can be bonded to the hydroxyl-functional group on the surface 222 of the modified coating film 220, and the water molecule can be removed, and the The antifouling molecules 250 are smoothly bonded and attached to the surface 222 of the modified plating film 220, and an antifouling film 260 is formed on the surface 222 of the modified plating film 220. In some exemplary examples, the baking temperature may be controlled at about 50 ° C to about 200 ° C during the baking process. This antifouling film 260 may be a monomolecular layer antifouling film.

Since the coating 220 is modified based glass layer and contains a large amount of silicon oxide (SiO _x), and therefore the atmosphere after plasma activation modified the modified process, the surface modification coating 220 222 a large number of hydroxyl functional groups. Thereby, the antifouling molecules 250 can be smoothly bonded to the modified coating film 220, and the adhesion of the formed antifouling film 260 to the modified coating film 220 on the substrate 200 can be effectively improved.

Please refer to FIG. 3, which is a bar chart comparing the results of abrasion resistance test of an antifouling film produced by a method of manufacturing an antifouling film according to an embodiment of the present invention and an antifouling film produced by a conventional method. This embodiment uses an atmospheric plasma deposition process to first form a modified coating on an aluminum alloy substrate, a substrate plated with decorative chromium, a chromium nitride substrate, and a stainless steel substrate, and then form an antifouling on the surface of the modified coating. In the comparative example, no modified coating was formed, and an antifouling film was directly formed on the surface of an aluminum alloy substrate, a substrate plated with decorative chromium, a chromium nitride substrate, and a stainless steel substrate. This abrasion resistance test is a wear resistance test using a dust-free cloth on the antifouling film of the embodiment of the present invention and the antifouling film of the comparative example at a pressure of 1 kg / cm ² . As can be seen from FIG. 3, the anti-fouling film of the embodiment of the present invention has far higher abrasion resistance times on different substrates than the anti-fouling film of the comparative example. Therefore, the application of this embodiment can effectively improve the adhesion of the antifouling film to the substrate.

It can be known from the above embodiments that one of the advantages of the present invention is that the method for improving the adhesion of an antifouling film of the present invention can be formed on a non-glass substrate or a substrate on which the surface to be coated does not have a silicon oxide (SiO _x ) layer. Modified coating based on silicon oxide (SiO _x ). Thereby, the hydroxyl functional group can be smoothly formed on the surface of the modified plating film. Antifouling molecules can bond with the hydroxyl functional groups on the surface of the modified coating film, and can form smoothly an antifouling film firmly attached to the modified coating film, thereby improving the adhesion of the antifouling film to the substrate Effect.

It can be known from the above embodiments that another advantage of the present invention is that the method for improving the adhesion of an antifouling film of the present invention can use an atmospheric plasma process to deposit an antifouling film. Therefore, compared with the vacuum coating process, the method can Significantly reduce process costs.

It can be known from the foregoing embodiments that another advantage of the present invention is that the method for improving the adhesion of an antifouling film of the present invention adopts an atmospheric plasma deposition process to form a modified plating film, so it can be applied to a substrate with a complicated structure, and It can be applied to the coating of substrates of various materials and has a wide range of applications.

Although the present invention has been disclosed as above by way of example, it is not intended to limit the present invention. Any person with ordinary knowledge in this technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application.

Claims (10)

    A method for improving the adhesion of an antifouling film, comprising: providing a substrate; forming a modified coating on one surface of the substrate, wherein forming a modified coating includes using a precursor, the precursor including silicon carbon oxygen Molecules; coating an antifouling molecule on the modified coating film; and performing a baking process.     For example, the method for improving the adhesion of an anti-fouling film according to item 1 of the application, wherein the substrate is a non-glass substrate, or a substrate having a coating surface without a silicon oxide (SiO _x ) layer.     For example, the method for improving the adhesion of an antifouling film according to item 1 of the patent application, wherein the formation of the modified coating film includes an atmospheric plasma deposition process, and the precursor includes a gas or a liquid.     For example, the method for improving the adhesion of an anti-fouling film according to item 1 of the patent application scope, wherein the modified coating film includes silicon oxide (SiO _x ).     For example, the method for improving the adhesion of an antifouling film according to item 1 of the application, wherein the modified coating film includes silicon dioxide, silicon oxide, and / or silicon oxycarbide.         For example, the method for improving the adhesion of an antifouling film according to item 1 of the application, wherein forming the modified coating film includes forming a plurality of hydroxide functions on one surface of the modified coating film.         For example, the method for improving the adhesion of an antifouling film according to item 1 of the scope of patent application, wherein the baking process includes controlling a baking temperature between 50 ° C and 200 ° C.         For example, before the method for improving the adhesion of an antifouling film in the scope of application for a patent, before the modified coating is formed, the method further includes performing an atmospheric plasma cleaning treatment on the surface of the substrate.         For example, the method for improving the adhesion of an antifouling film in the scope of application for a patent, after forming the modified coating film, the method further includes performing an atmospheric plasma modification treatment on the modified coating film, so that one of the modified coating films may be modified. A plurality of hydroxide functional groups are formed on the surface.         For example, the method for improving the adhesion of an anti-fouling film according to item 1 of the patent application scope, wherein the thickness of the modified coating is equal to or less than 100 nm.