KR20090121047A - Article including visible light catalyst - Google Patents

Abstract

PURPOSE: An article including a visible light catalyst and a manufacturing method thereof are provided to give a kitchen stuff antibacterial and deodorant properties in a visible light range while securing physical properties of the kitchen stuff. CONSTITUTION: An article comprises a primer layer(210), an intermediate layer(230), and an upper layer(250). One of the layers includes Ti-Mn-M metal composition, which can be excited in a visible light range, 1.0~2.5 parts by weights to 100 of each layer. M of the Ti-Mn-M metal composition is selected from Ir, Mg, and Ge. The metal composition includes a visible light catalyst(300) with density of 1.5~3.5g/cm^2, principal particle size of 20~40nm, and average particle size of 1.25~1.55μm.

Description

 Apparatus containing visible light catalyst and method for preparing the same {Article including Visible Light catalyst}

The present invention relates to a device including a visible photocatalyst and a method for manufacturing the same, and more particularly, to a method for including a visible photocatalyst in a kitchen appliance and a kitchen appliance manufactured by the method.

Of the common appliances that need to be coated on the surface, all instruments are generally made of metal, such as aluminum. Initially, the appliance itself has been used even with the metal itself. In order to prevent problems such as scratching of the surface of the device when cooking the same thing or in other cases, various kinds of devices have been developed since the development of a coating layer applied to the surface to form a coating layer on the surface. In addition to the coating solution of the various forms of coating layer formed on the surface appeared.

Among them, a primer coat, a mid coat, and a top coat are sequentially laminated on the surface of the apparatus, so-called three coatings forming a coating layer are commonly applied to the apparatus. Recently, as shown in FIG. 2, the coats are partially dried on the primer coat 20 or the midcoat 30 using the triple coating layer 50 applied to the apparatus 10. Or disperse the spatter ink of different colors in a sufficiently moist state to form a discontinuous coat 60 composed of continuous small spherical bodies, and apply the top coat 40 thereon to form the discontinuous coat. Although it is expressed as a multicolored pattern in 50), a coating layer has been developed to prevent the surface of the device from being scratched slightly by itself. It was typically applied to the utensils you use.

By the way, in order to explain the coating layer, the coating layer of the kitchen appliance of the type described above was representatively selected, but in the end, all the coating layers on the surface of the apparatus remain only in the role of protecting the surface of the apparatus or expressing aesthetics. Since the composition constituting the coating layer itself does not have a specific property to exert a special effect on the human body, in order to cook the food that a human ingests, the raw material of the food must be coated with the coating layer formed on the surface of the kitchen utensil. In view of the contact, it may not be overlooked that the coating component of the kitchen utensils necessarily affects the raw material of the food to some extent.

In view of this, the present inventor has proposed a mechanism in which a coating layer is formed of a paint mixed with a photocatalyst using a photocatalyst component. Specifically, the ultrafine titanium dioxide particles, which are photocatalysts, are selected as one of the specific components among the components of the coating layer of the apparatus, and the ultrafine titanium dioxide particles having a certain range of composition range and particle size are uniformly dispersed in the paint. In the added state, the superfine powder titanium dioxide particles, which are photocatalysts, are sporadically applied to the coating layer of the apparatus formed and applied by the paint, and according to the intrinsic properties of the ultrafine titanium dioxide photocatalyst in the surface of the apparatus. The present invention relates to an apparatus having a coating layer containing a photocatalyst exhibiting antimicrobial, bactericidal and deodorizing effects.

Although the proposed apparatus has the advantage of expressing antimicrobial properties by reacting with ultraviolet rays, the photocatalytic material is excited by ultraviolet rays, and thus, there is a necessity of supplementation in that the actual kitchen utensil is less likely to be exposed to ultraviolet rays. .

Therefore, the present inventors have found the necessity of developing a kitchen utensil capable of expressing antimicrobial properties in the visible light region, and the development of such a product has been requested.

In order to solve the above problems, an object of the present invention is to provide a kitchen appliance that can express the antibacterial and deodorant in a general kitchen or home.

In order to achieve the above object, the present invention provides a device including a coating layer consisting of a primer layer, an intermediate layer, and an upper layer on an upper portion of the substrate layer, which may be excited in the visible region in the primer layer or the intermediate layer or the upper layer. -M-based composite metal is included 1.0 to 2.5 parts by weight with respect to each layer 100, M of the Ti-Mn-M-based composite metal may be one or more selected from Ir, Mg, Ge, the metal is 1.5 Provided is a device comprising a visible light catalyst having a density of ˜3.5 g / cm 2, the main particle size ranging from 20-40 nm, and the average particle size ranging from 1.25 to 1.55 μm.

In another aspect, the present invention, the primer layer is a device containing a visible light catalyst consisting of 16.8% by weight of the polyamide nmp dissolving mixture, 4.1% by weight of water, 67.2% by weight of PTFE dispersion, 3.5% by weight of carbon black dispersion, 8.4% by weight of silica dispersion To provide.

In the present invention, the intermediate layer is 81.5 wt% PTFE dispersion, 9.22 wt% water, 3.14 wt% aromatic hydrocarbon, 0.46 wt% triethylamine, 0.46 wt% oleic acid, 0.33 wt% surfactant, 3.35 wt% carbon black dispersion, mica Provided is an apparatus comprising a visible light catalyst consisting of 1.54% by weight.

In another aspect, the present invention is a visible light catalyst consisting of 89.25% by weight of PTFE dispersion, 6.53% by weight of water, 1.09% by weight of aromatic hydrocarbons, 0.32% by weight of triethylamine, 0.32% by weight of oleic acid, 0.25% by weight of surfactant, 2.24% by weight of mica. Provides a mechanism included.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the meanings indicated are intended to aid the understanding of the invention. Accurate or absolute figures are used to assist in the prevention of unfair use by unscrupulous infringers.

Figure 1 shows an enlarged cross-sectional view of the mechanism according to the invention according to a preferred embodiment of the present invention.

In the apparatus according to the present invention, the coating layer 200 may be formed on the base layer 100, and the coating layer 200 may be formed of a primer layer 210, an intermediate layer 230, and an upper layer 250. 1 illustrates an example in which the visible photocatalyst particles 300 are formed in the upper layer 250, and the catalyst particles are uniformly distributed in the upper layer 250.

On the other hand, visible ray-photocatalyst is a material that decomposes various pollutants by promoting the catalytic reaction (oxidation ?? reduction reaction) as light as an energy source. It is known as an environmental purification material that decomposes various organic substances into water and carbon dioxide by the oxidation reaction on the surface of the decomposing action and shows effects such as antibacterial, antifouling, deodorization, air purification, and hydrophilicity. It is a ceramic that is harmless to human body, and its main raw material is TiO ₂ which is widely used in white pigments, cosmetics, paints and food additives.

Since the photocatalyst has a very small amount of ultraviolet light in the room, current products (ultraviolet light photocatalysts) are almost ineffective for indoor use. Since most of the light generated in the room is visible light, it is clear that the visible light photocatalyst suitable for the indoor environment is a useful application method.

The visible photocatalyst absorbs light energy to form activated electrons (electrons) and electron holes (h +), and reacts with oxygen (O ₂ ) and water (H ₂ O) to form strong oxidizing power. Hydroxy radicals (-OH) and super oxides (O _2- ) are produced, which oxidizes and decomposes organic compounds to water (H ₂ 0) and carbon dioxide (CO ₂ ).

 The visible photocatalyst according to the present invention may be a Ti-Mn-M based composite metal. Here, M may be at least one of Ir, Mg, and Ge. Specifically, the TiO2 powder is impregnated with manganese nitrate as a manganese metal, which is impregnated with one or more metals out of germanium chloride or germanium oxide with magnesium chloride, magnesium hydroxide, and germanium metal as iridium chloride or magnesium metal as iridium metal. After drying for 6 hours or longer at 300 ℃ to 500 ℃ for more than 2 hours to prepare a Ti-Mn-M composite metal visible light catalyst.

In the apparatus according to the present invention, the visible light catalyst 300 may be formed in the upper layer 250, which is the outermost layer, as shown in FIG. However, the present invention is not limited thereto, and the visible light catalyst 300 may be formed in the intermediate layer 230 or the primer layer 210. Preferably, the upper layer 250 may be formed.

The coating layer 200 formed on the surface of the base layer 100 of the apparatus is preferably about 30 to 40㎛, but if it is less than the above range, there is a problem in durability, and if it exceeds the above range, the productivity is limited.

The primer layer 210 of the coating layer 200 is a composition and composition of 16.8% by weight of the polyamide-based nmp dissolved mixture, 4.1% by weight of water, 67.2% by weight of PTFE dispersion, 3.5% by weight of carbon black dispersion, 8.4% by weight of silica dispersion. Preferably in proportion.

In addition, the intermediate layer 230 is 81.5 wt% PTFE dispersion, 9.22 wt% water, 3.14 wt% aromatic hydrocarbon, 0.46 wt% triethylamine, 0.46 wt% oleic acid, 0.33 wt% surfactant, 3.35 wt% carbon black dispersion, mica 1.54 It is preferable that the composition is made up of a weight% composition and composition ratio.

The upper layer 250 is composed of 89.25% by weight of PTFE dispersion, 6.53% by weight of water, 1.09% by weight of aromatic hydrocarbons, 0.32% by weight of triethylamine, 0.32% by weight of oleic acid, 0.25% by weight of surfactant, and 2.24% by weight of mica. Will be made.

At this time, the visible light catalyst for each of the primer layer, the intermediate layer or the upper layer is preferably included 1.0 to 2.5 parts by weight based on the respective layer 100. The visible light catalyst is preferably spherical particles and has a density of 1.5 to 3.5 g / ㎠, the main particle size is 20 to 40nm, the average particle size is preferably in the range 1.25 ~ 1.55㎛. In the case of exceeding the above range, there is a problem in that the size and amount of the particles are excessively dispersed uniformly in each coating layer, and the effect is insignificant in the case below the above range.

As described above, antimicrobial and deodorizing properties can be provided to the appliance in the visible region while securing necessary material properties for the kitchen appliance according to the embodiment of the present invention. .

Hereinafter, the mechanism according to the present invention will be described through specific examples.

Example 1

A sand blasting treatment in which numerous embossings are formed on the base layer of the apparatus to increase the surface area, and after washing the same, 16.8 wt% of polyamide-based nmp soluble mixture, 4.1 wt% of water, and PTFE dispersion 67.2 wt% %, A carbon black dispersion of 3.5% by weight, silica dispersion of 8.4% by weight of the primer layer was formed to a thickness of about 10㎛. After drying at 200 ° C. for 15 minutes, 81.5% by weight of PTFE dispersion, 9.22% by weight of water, 3.14% by weight of aromatic hydrocarbons, 0.46% by weight of triethylamine, 0.46% by weight of oleic acid, and 0.33% of surfactant on top of the primer layer. %, Carbon black dispersion 3.35 wt%, mica 1.54 wt%

The intermediate layer was applied to a thickness of about 12 μm. A 12 μm thick coating was then applied to the top layer of 89.25 wt% PTFE dispersion, 6.53 wt% water, 1.09 wt% aromatic hydrocarbon, 0.32 wt% triethylamine, 0.32 wt% oleic acid, 0.25 wt% surfactant, and 2.24 wt% mica. It was. The coated coating layer was dried at 300 to 350 ° C. for 15 minutes to complete the apparatus including the coating layer. About 2.0 parts by weight of the visible light catalyst for the upper layer was included.

Test Methods

1. Antibacterial test

Cover the film on the test specimens of Example 1 and BLACK for the strains of the table below, and tested under fluorescent lamp irradiation conditions (distance between the test specimen and the fluorescent lamp: 20 cm)

Test strain Item Test result Initial concentration (CFU / mL) Concentration after 8 hours (CFU / mL) Bacterial Reduction Rate (%) Esherichia coli BLACK 421 421 - Example 1 421 246 41.5 Staphylococcus aureus BLACK 405 405 - Example 1 405 215 46.9 Pseudomonas  aerusinosa BLACK 425 425 - Example 1 425 262 38.4

2. Deodorization test

In 500mmX400mmX400mm Graywolf sensing chamber using a soultion's TG-502 was tested for NH _3. The test results are shown in Table 2 and FIG. 4.

In addition, HCHO was tested by the gas detection tube method, and the test results are shown in Table 3 and FIG. 5.

Test Items Elapsed time (min) BLACK concentration (ppm) Sample concentration (ppm) Deodorization rate (%)   Test result 0 60 60 0 30 58 17 71 60 57 11 81 90 55 7 87 120 53 4 92

Test Items Elapsed time (min) BLACK concentration (ppm) Sample concentration (ppm) Deodorization rate (%)   Test result 0 83 83 0 30 80 37 54 60 79 21 73 90 76 15 80 120 74 13 82

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 to 3 is a conceptual cross-sectional view of a kitchen utensil according to an embodiment of the present invention.

4 and 5 are graphs of the deodorization reduction of the instrument according to a preferred embodiment of the present invention.

<Description of Major Symbols in Drawing>

100: base layer 200: coating layer

210: primer layer 230: intermediate layer

250: upper layer 300: visible light catalyst

Claims (4)

In the apparatus comprising a coating layer consisting of a primer layer, an intermediate layer and an upper layer on top of the base layer, Ti-Mn-M-based composite metal which can be excited in the visible region in the primer layer or the intermediate layer or the upper layer includes 1.0 to 2.5 parts by weight with respect to each of the layers 100, M of the Ti-Mn-M-based composite metal may be one or more selected from Ir, Mg, and Ge, the metal has a density of 1.5 to 3.5g / ㎠, the main particle size is 20 to 40nm, Apparatus comprising a visible light catalyst having an average particle size in the range of 1.25 to 1.55 μm. The method of claim 1, The primer layer comprises a visible light catalyst consisting of 16.8% by weight of the polyamide nmp dissolving mixture, 4.1% by weight of water, 67.2% by weight of PTFE dispersion, 3.5% by weight of carbon black dispersion, 8.4% by weight of silica dispersion. The method of claim 1, The intermediate layer was 81.5 wt% PTFE dispersion, 9.22 wt% water, 3.14 wt% aromatic hydrocarbon, 0.46 wt% triethylamine, 0.46 wt% oleic acid, 0.33 wt% surfactant, 3.35 wt% carbon black dispersion, 1.54 wt% mica. Apparatus comprising a visible light catalyst made. The method of claim 1, The top layer was a device containing a visible catalyst comprising 89.25% PTFE dispersion, 6.53% water, 1.09% aromatic hydrocarbon, 0.32% triethylamine, 0.32% oleic acid, 0.25% surfactant, and 2.24% mica. .

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