KR20020011823A - the method for synthesizing polymer layer on material including stainless steel using plasma - Google Patents

Abstract

PURPOSE: A method for synthesizing a polymer layer on the surface of a stainless steel using plasma is provided which shortens the pretreatment process of the surface of stainless steel and improves paintability between the stainless steel and paint by forming a polymer layer on the surface of the stainless steel using plasma polymerization. CONSTITUTION: In a method for synthesizing a polymer layer on the surface of a stainless steel, the method for synthesizing the polymer layer on the surface of the stainless steel using plasma comprises the steps of positioning the anode and the cathode that are formed of stainless steel the surface of which is to be treated in a chamber; introducing an unsaturated aliphatic hydrocarbon monomer gas having a certain pressure and a non-polymerizable gas having a certain pressure into the chamber in the vacuum state of the chamber; and impressing a voltage to the electrodes so that plasma consisting of cations, anions and radicals is obtained from the unsaturated aliphatic hydrocarbon gas and the non-polymerizable gas introduced into the chamber by DC or RF discharging, and forming a hydrophilic or hydrophobic polymer layer on the surface of the anode by plasma deposition.

Description

The method for synthesizing polymer layer on material including stainless steel using plasma}

The present invention relates to a method for synthesizing a polymer film on a surface of a stainless steel material using plasma, and more particularly, to form a polymer polymerized film on a stainless steel surface by using plasma polymerization to coat paint on a stainless steel surface. The present invention relates to a method for synthesizing a polymer film on the surface of a stainless steel material using a plasma to increase the capability.

In general, stainless steels have corrosion resistance, corrosion resistance, heat resistance, low temperature strength, high temperature strength, high temperature corrosion resistance, weld bending resistance, abrasion resistance, fatigue strength, high temperature creep strength, weldability, shape freezing and complex formation due to the addition of various elements. It can be used for various purposes in various fields because it can make stainless steel with various properties such as core and deep workability. However, while it is possible to impart these excellent properties to stainless steel, the stainless steel surface to which these properties are endowed has little or no adhesion to other materials, making it difficult to bond other materials to the stainless steel surface. If you want to bond other materials, you have to process the stainless steel surface through a complicated process, but it was possible to bond between the stainless steel surface and other materials, but this was also weak.

In other words, in order to paint the stainless steel surface, a complicated process may be required. For example, solvent cleaning may be performed after sanding the stainless steel surface with sand paper # 100 to # 200. As a result, oil, water, and other contaminants are removed and paint is coated on the surface of stainless steel. However, this method does not significantly increase the adhesion between the paint and stainless steel. In addition, when the polymer is to be deposited on any material by the deposition process, at least the following several steps are required. That is, (1) synthesizing monomers, (2) synthesizing polymers of multimers to form intermediate polymers for polymer formation or advancing to the next step, (3) preparing coating solutions (4) cleaning and / or optimizing the substrate surface by applying a primer or a coupling agent, (5) coating, (6) drying the coating layer, and (7) calcining the coating layer. There was a problem that a complicated multi-step process is required.

Therefore, those skilled in the art have always been struggling with the development of the reduction of the deposition process and the paint coating process and the increase of the paintability (paint adhesion) of the paint.

The technical problem to be achieved by the present invention is to form a polymer polymerization film on the surface of stainless steel in order to paint a paint having various colors and properties on the surface of the stainless steel to increase the paintability between the stainless steel and the paint to improve the plasma polymerization. It is one of the processes used.

That is, the present invention forms a polymer thin film on the surface of the stainless steel by using plasma polymerization to reduce the pretreatment process of the surface of the stainless steel and to increase the paintability between the stainless steel and the paint. It is an object to provide a method for synthesizing a polymer film on a material surface.

1 is a block diagram of a polymer polymerization apparatus using a plasma for practicing the present invention.

2 is a graph showing FT-IR spectra of products polymerized on the surface of the cathode side and the anode side by DC discharge of acetylene and nitrogen.

Figure 3 is a perspective view of the result of testing the adhesion by a tape test method after coating the paint on the surface of the polymer synthesized by the plasma polymerized polymer film synthesis method according to the invention for 30 seconds on the stainless steel surface.

Figure 4 is a perspective view of the results of the adhesion test by coating the paint after synthesis of the polymer on the surface of stainless steel by the plasma polymerized polymer synthesis method according to the present invention and stored in various organic solvents for 24 hours.

In order to achieve the above object, a method for synthesizing a polymer film on the surface of a stainless steel material according to the present invention comprises the steps of placing an anode and a cathode made of stainless steel to be surface treated in a chamber, and in a predetermined vacuum state in the chamber. Introducing an unsaturated aliphatic hydrocarbon monomer gas of a predetermined pressure and a polymerizable gas of a predetermined pressure into the chamber, and applying a voltage to the electrode to polymerize with an unsaturated aliphatic hydrocarbon gas introduced into the chamber by DC or RF discharge. Obtaining a plasma consisting of positive (+) and negative (-) ions and radicals from the inert gas, and forming a polymeric polymer film having a hydrophilic or hydrophobic on the surface of the anode by plasma deposition.

In a preferred embodiment of the present invention, the DC discharge is periodically performed in the form of an ON / OFF pulse during the pre-treatment time is characterized in that to improve the hydrophilic performance of the polymer.

In another embodiment of the present invention, the polymer obtained in the step of forming the polymerized film is surface treated by plasma of at least one polymerizable gas selected from the group consisting of O 2, N 2, CO 2, CO, H 2 O and NH 3 gas It is characterized by improving the hydrophilic performance of the polymer. In another embodiment of the present invention, the electrode or the insulating material deposited with the polymer is used as a cathode in the step of forming a polymer film during the additional plasma treatment.

In another embodiment of the present invention, the polymer polymerization step by plasma in the step of forming the polymer film is characterized in that the treatment time is performed for 1 second to 2 minutes. In another embodiment of the present invention, the properties of the polymerized polymer membrane are determined according to the ratio of the unsaturated aliphatic hydrocarbon monomer gas and the polymerizable gas.

In another embodiment of the present invention, the polymerizable gas is within 0 to 90% of the total gas mixture, or the properties of the polymerized polymer film is determined according to the ratio of the unsaturated aliphatic hydrocarbon monomer gas and the polymerizable gas. do.

According to another embodiment of the present invention, a stainless steel material capable of coating paint for various uses and a stainless steel material coated with paint having various properties is provided on a stainless steel surface having a hydrophilic polymer.

That is, the present invention is a method of synthesizing a polymer film on a stainless steel surface using a DC plasma (a) placing a stainless steel anode electrode and a cathode electrode surface-treated in the chamber, (b) the pressure in the chamber to a predetermined vacuum state And an unsaturated aliphatic hydrocarbon monomer gas and a nonpolymerizable gas at a predetermined pressure are introduced into the chamber such that the ratio of the nonpolymerizable gas is 0 to 90% with respect to the total reaction gas, and (c) a voltage is applied to the electrode. To obtain a plasma composed of positive (+) and negative (-) ions and radicals from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas introduced into the chamber by DC discharge, and the plasma is hydrophilic to the surface of the metal material. Synthesis of Polymer Polymer Films to Material Surfaces Using DC Discharge Plasma Provide a method.

In addition, the present invention provides a method for synthesizing a polymer polymer film on a surface of a stainless steel material using RF plasma, comprising: (a) placing stainless steel surface-treated in a chamber on a passive electrode and an active electrode, and (b) pressure in the chamber. Is maintained in a predetermined vacuum state, and an unsaturated aliphatic hydrocarbon monomer gas and a polymerizable gas at a predetermined pressure are introduced into the chamber such that the ratio of the polymerizable gas to 0 to 90% of the total reaction gas is provided, and (c) the electrode A voltage consisting of positive (+) and negative (-) ions and radicals was obtained from an unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas introduced into the chamber by RF discharge by applying a voltage to the stainless steel. High-strength to stainless steel surface using RF discharge plasma to form polymerized polymer film having hydrophilicity on the surface Provided is a method for synthesizing a molecular polymer film.

Here, the polymerizable gas refers to a gas that can not polymerize the polymer alone, such as nitrogen, oxygen, carbon dioxide, and can be used together with other monomer gases to help polymer polymerization.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the polymer film synthesis method on the surface of a stainless steel material using a plasma.

The present invention relates to a surface treatment method of a stainless steel material, in particular, a method of synthesizing a hydrophilic polymer polymer film using a DC discharge plasma or an RF discharge plasma on the surface of the stainless steel material and paint on the stainless steel surface coated with a hydrophilic polymer thin film It is about how to paint.

That is, the characteristics of stainless steel may be improved by plasma polymerization to form a polymer film having a hydrophilic surface layer on the surface of stainless steel, thereby improving the adhesion between stainless steel and other materials in a simpler process.

The hydrophilic surface modification can improve the bad adhesion to other materials of stainless steel by forming a hydrophilic surface layer that can maintain a physical and chemically stable state on the stainless steel surface. The formation of a stable hydrophilic surface layer on the stainless steel surface can be achieved by depositing a hydrophilic polymer film on the stainless steel surface.

1 is a block diagram of a polymer polymerization apparatus using a plasma for carrying out the present invention, Figure 2 is a graph showing the FT-IR spectrum of the product polymerized on the surface of the cathode side and the anode side by DC discharge of acetylene and nitrogen to be. A method of forming a polymerized polymer film with a minimum process. The gas raw material to be synthesized is blown into a vacuum chamber of comparatively low vacuum (10-2-101 Torr) by a vacuum pump system. , Polymers are formed by forming a gas into a plasma state using a DC power source or an RF power source, and at the same time, various ionized gases and radicals formed in the plasma are reacted by an applied energy supply, and polymer synthesis is performed. When the membrane synthesis method is followed, the above-described several-step unit process may be replaced by one-step process.

Thus, the polymer formed on the surface of the substrate by the plasma polymerized film synthesis method is known to have excellent adhesion to the substrate, and has a strong resistance to most chemicals, in the experimental results in Figures 3 and 4 As shown, in fact, a hydrophilic polymer film was formed on the surface of stainless steel, and then stored in various organic solvents (MeOH, n-HEXANE, Methylene Chloride, Cyclohexaneone, Acetone) for more than 24 hours. It was found that there was no change in paintability due to no detachment of the polymer film.

Polymeric films produced by plasma polymerization have hydrophilic properties. Hydrophilicity is closely related to surface energy. As surface energy increases, surface hydrophilicity improves. In addition, as the surface energy increases, the material to be deposited or adhered to the surface is improved in adhesion with the original material. Adhesion force is a force necessary to separate the attached objects to each other is proportional to the newly generated surface energy when separated from each other, the adhesion force increases as the surface energy before bonding increases.

From the correlation between the hydrophilicity and the adhesive force, the polymer by the plasma polymer polymerization having excellent hydrophilicity can be applied to enhance the adhesion of two materials having no adhesive force. Therefore, in the present invention, the hydrophilic polymer polymerization membrane synthesized by the above synthesis method serves as an intermediate medium to which other materials can be bonded to provide high adhesion to stainless steel surfaces. By applying this technique, it is possible to provide high paintability between paint and stainless steel in a simpler process than the conventional coating method.

Although the preferred embodiments of the present invention have been described in detail above, those of ordinary skill in the art to which the present invention pertains may make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that the branches can be carried out by transformation or change. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

The present invention improves the complexity of the process and the low coatability and adhesion that have been a problem in bonding other materials to stainless steel surfaces, thereby simplifying the process using plasma polymerization and high adhesion between the different materials. As a result, the paint can be painted on the surface of stainless steel, so that not only the color of the stainless steel itself but also the color steel plate expressed in different colors and the paint having special functions can be expressed on the surface of stainless steel. As a result, it is possible to provide a stainless steel having excellent properties not only of stainless steel but also of polymer film and paint coating adhesiveness.

Claims (9)

In a method for synthesizing a polymer film on the surface of a stainless steel material, (a) placing an anode and a cathode made of stainless steel to be surface treated in the chamber; (b) introducing a predetermined pressure of an unsaturated aliphatic hydrocarbon monomer gas and a predetermined pressure of polymerizable gas into the chamber in a predetermined vacuum state in the chamber; (c) applying a voltage to the electrode to obtain a plasma composed of positive and negative ions and radicals from an unsaturated aliphatic hydrocarbon gas and a nonpolymerizable gas introduced into the chamber by DC or RF discharge; Forming a polymer polymerized film having hydrophilicity or hydrophobicity on the surface of the anode by vapor deposition; and a method of synthesizing the polymer film on the surface of a stainless steel material using plasma. The method of synthesizing a polymer film on a surface of a stainless steel material using plasma according to claim 1, wherein the DC discharge is periodically performed in the form of an ON / OFF pulse during a pretreatment time to improve the hydrophilic performance of the polymer. According to claim 1, wherein the polymer obtained in step (c) is surface-treated by a plasma of at least one non-polymerizable gas selected from the group consisting of O2, N2, CO2, CO, H2O and NH3 gas is hydrophilic of the polymer A method for synthesizing a polymer film on the surface of a stainless steel material using plasma, characterized by improving performance. 4. The method of synthesizing a polymer film on a surface of a stainless steel material using plasma according to claim 3, wherein the electrode or insulating material on which the polymer is deposited in step (c) is used as a cathode during the additional plasma treatment. The method of synthesizing a polymer film on the surface of a stainless steel material using a plasma according to claim 1, wherein the polymer polymerization step of plasma (c) is performed for 1 second to 2 minutes. The method of synthesizing a polymer film on the surface of a stainless steel material using plasma according to claim 1, wherein the property of the polymer polymerization film is determined according to a ratio of the unsaturated aliphatic hydrocarbon monomer gas and the polymerizable gas. The method of claim 1, wherein the non-polymerizable gas is 0 to 90% of the total gas mixture. The method of synthesizing a polymer film on the surface of a stainless steel material using plasma according to claim 1, wherein the property of the polymer polymerization film is determined according to a ratio of the unsaturated aliphatic hydrocarbon monomer gas and the polymerizable gas. The polymer film on the surface of a stainless steel material using plasma according to any one of claims 1 to 8, wherein a polymer film is formed on the surface of the stainless steel capable of coating paints for various uses on the surface of the stainless steel having a hydrophilic polymer. Synthesis method.