KR20100092622A - Wallpaper with deodorizing function and method of maunfacturing of the wallpaper - Google Patents

Abstract

PURPOSE: Wallpaper with an air-purifying function and a method for manufacturing the same are provided to constantly maintain deodorization-effect and protect the appearance of the wallpaper under insufficient radiated-light. CONSTITUTION: A base layer, a printed layer, and an air-purifying coated layer are successively stacked to form air-purifying wallpaper. The air-purifying coated layer is coated with visible-ray photo-catalyst which is activated in a visible-ray region. The visible-ray photo-catalyst includes a solvent, titanic compound, chelating agent, metal compound and an acid catalyst.

Description

Wallpaper with Deodorizing function and Method of Maunfacturing of the Wallpaper

The present invention relates to an air purification wallpaper and a manufacturing method thereof, and more particularly, to an air purification wallpaper which can sufficiently exhibit a photocatalytic effect with a light source having a weak amount of light such as incandescent and fluorescent lamps, as well as ultraviolet rays and sunlight. It relates to a manufacturing method thereof.

In general, a method of imparting a deodorizing function to a wallpaper includes a method of adding an adsorbent having many pores or using a photocatalyst. When the adsorbent with many pores is applied to the wallpaper, the adsorbent may be exposed to the surface to exert an effect. However, in order to attach the adsorbent to the wallpaper, the adsorbent must be added to the surface coating layer. In this case, the pores of the adsorbent are blocked by the adhesive, so that the deodorizing performance cannot be exhibited. In addition, since the size of the adsorbent is generally about tens of micrometers and the color is black, there is a problem that the printability is reduced when the coating on the surface of the wallpaper.

In order to create a pleasant indoor environment, a method of removing contaminants using photocatalytic photoactivity has been proposed. Among them, researches using photocatalysts represented by titanium dioxide have been actively conducted.

Titanium dioxide-based photocatalysts are spotlighted as environmentally friendly materials for converting light energy into chemical energy at room temperature. Recently, titanium dioxide photocatalysts have been widely applied in fields such as indoor air purification, antibacterial and deodorization, and research for improving photoactivity Actively done. In particular, as a method for improving the photoactivity, a method of ultra-micronizing titanium dioxide in nano units and a method of adding metals such as platinum, silver, and nickel to titanium dioxide have been studied.

However, general photocatalyst coating is effective in ultraviolet light, but it is hard to see big effect because it is exposed to visible light in daily life. In addition, since the photocatalysts are added to the surface coating solution, when the photocatalyst reacts, a reaction may occur inside the coating solution, causing surface aging. In addition, since the ultraviolet-sensitive photocatalyst acts only under sunlight or under irradiation with ultraviolet rays, it is true that there are many limitations in use, and it is an obstacle to diversification and expansion of photocatalyst applications.

The present invention is to solve the above problems, in the wallpaper that can remove formaldehyde and life odor by applying a deodorizing air purification coating on the surface of the product, visible light areas such as indoor lights, fluorescent lamps, LED lights Air that maintains the deodorizing effect even in the condition of low energy of the wavelength band and the low irradiation amount of light, maintains the effect rather than the one-time effect, and maintains the deodorizing effect without causing the aging phenomenon of the wallpaper by spray coating and does not damage the appearance of the wallpaper. It aims to provide a purification function wallpaper.

The present invention is to achieve the above object, in the wallpaper consisting of a substrate layer, a printing layer and an air purification coating layer sequentially from below, the air purification coating layer was coated with a visible photocatalyst that is activated in the visible light region, The visible photocatalyst provides an air purification wallpaper including a solvent, a titanium compound, a chelating agent, a metal compound, and an acid catalyst.

In addition, the visible photocatalyst is characterized in that it further comprises a binder.

In addition, the binder is characterized in that the triethyl ortho silicate, gamma glycidoxy propyl trimethoxy silane or a mixture thereof.

In addition, the solvent is characterized in that the alcohol of C1 ~ C4.

In addition, the alcohol is characterized in that the isopropanol.

In addition, the titanium compound is characterized in that the titanium (IV) isopropoxide.

In addition, the chelating agent is characterized in that ethylenediamine, tetraacetic acid (EDTA) or diacetylmethane.

In addition, the metal compound is characterized in that the nitrate, sulfate or chloride of a metal selected from the group consisting of zinc, copper, iron, manganese, lithium and silver.

In addition, the acid catalyst is characterized in that hydrochloric acid, nitric acid, sulfuric acid or acetic acid.

In addition, the present invention (a) adding a titanium compound and a chelating agent to the alcohol to react; (b) dissolving the metal compound in distilled water; (c) adding a solution of step (a) to the solution of step (b) under an acid catalyst to prepare a visible photocatalyst; And (d) provides a method for producing an air purification wallpaper comprising the step of coating the wallpaper on the visible photocatalyst.

In addition, it characterized in that it further comprises the step of introducing a binder between the step (c) and step (d).

In addition, the present invention (a) isopropanol titanium (IV) isopropoxide and the step of reacting by adding diacetylmethane as a chelating agent; (b) selecting and dissolving 2 to 4 kinds of nitrates of Zn, Cu, Fe, Mn, Li, and Ag as metal compounds in distilled water; (c) slowly adding the solution obtained in step (A) to the solution obtained in step (B) in a temperature range from room temperature to 90 ° C. and adding nitric acid with an acid catalyst while stirring at 90 rpm or more for 2 hours or more; (d) adding triethylorthosilicate and gamma glycidoxypropyltrimethoxysilane alone or in combination as a binder to prepare a visible photocatalyst; And (e) coating the visible photocatalyst on the wallpaper.

In addition, the coating is characterized in that the spray coating.

According to the present invention, not only the ultraviolet light but also a light source having a weak amount of light such as an incandescent lamp, a fluorescent lamp, and an LED light source not only sufficiently exhibit a photocatalytic action but also have a long-lasting effect, so that only a place where a sufficient amount of conventional light has not been obtained has been obtained. However, it can be used for wallpaper of various places, and it can provide a wallpaper that can be used for a long time by not damaging the appearance of the wallpaper.

The present invention is a wallpaper comprising a substrate layer, a printing layer and an air purification coating layer sequentially from below, wherein the air purification coating layer is coated with a visible photocatalyst activated in the visible light region, the visible photocatalyst is a solvent, titanium compound, It relates to an air purification wallpaper comprising a chelating agent, a metal compound and an acid catalyst.

Hereinafter, the present invention will be described in detail.

The effects of these metals on the effects of photocatalysts by doping various types of metal ions into titanium dioxide have shown that the photocatalysts produced using specific metal ions are not only effective in the ultraviolet region, but are also a challenge until now. In the visible light region (about 400nm ~ 800nm) has been found to be effective in the absorption of incandescent, fluorescent, LED, etc. effectively applied to the coating of the wallpaper, and completed the present invention.

In addition, the wallpaper of the present invention can be produced by a method comprising the following steps.

(a) reacting the alcohol by adding a titanium compound and a chelating agent;

(b) dissolving the metal compound in distilled water;

(c) adding a solution of step (a) to the solution of step (b) under an acid catalyst to prepare a visible photocatalyst; and

(d) coating the visible photocatalyst on a wallpaper

(a) a titanium compound with alcohol Chelating agent  Reaction by addition

The order of addition in this step may be any of them first. At this time, a very vigorous exothermic reaction proceeds until the exotherm stops while stirring sufficiently. At this time, the titanium compound to be used can use all known titanium compounds, and in consideration of stable supply and handling properties, it is preferable to use titanium (IV) isopropoxide (TTIP), an organic titanium compound. desirable.

The alcohol uses C1-C4 lower alcohols, including isopropanol. The amount of alcohol was used in a ratio of 0.50 to 5.00 mol relative to 1 mol of titanium (IV) isopropoxide. If it is less than 0.50 mol or more than 5.00 mol, there is no performance as a catalyst.

Chelating agents use chelating agents to uniformly and stably react titanium compounds. Examples of chelating agents that can be used include ethylenediamine tetraacetic acid (EDTA) and diacetylmethane. Preference is given to using acetylmethane. The addition amount can be added in the ratio of 0.10-1.00 mol with respect to 1 mol of titanium compounds to be used. If it is less than 0.10 mol or more than 1.00 mol, there is no performance as a catalyst.

(b) dissolving the metal compound in distilled water

Distilled water in this step was used in a ratio of 25 to 550 mol relative to 1 mol of the titanium compound used.

Metals that can be used as metal salts include Zn, Cu, Fe, Mn, Li, or Ag, and nitrate, sulfate, chloride, and the like of the metal may be used. Select 2 ~ 4 types to use.

(c) Under acid catalyst  The solution of step (a) was added to the solution of step (b) By stirring  Step of preparing a visible photocatalyst

In this step, the metal salt is completely dissolved in distilled water in the step (b) in the temperature range from room temperature to 90 ° C. The solution obtained in step (a) is gradually added and stirred at 90 rpm or more. To prepare.

Acid catalysts that can be used include hydrochloric acid (HCl), nitric acid (HNO ₃ ), sulfuric acid (H ₂ SO ₄ ), acetic acid (CH ₃ COOH), and preferably nitric acid and hydrochloric acid. In the present invention, nitric acid was selected, and the addition amount was used in a ratio of 0.10 to 0.50 mol based on 1 mol of the titanium compound to be used. If less than 0.10 mol or more than 0.50 mol, there is no performance as a catalyst.

(d) coating the visible photocatalyst on the wallpaper

In this step, by coating the surface of the visible photocatalyst prepared as described above to the wallpaper surface to produce a wallpaper having an air purification function according to the present invention. The coating may use known coating means and is not limited, but in particular spray coating is preferred. In the manufacture of conventional photocatalytic coated wallpaper, the photocatalyst is added to the coating liquid to cause surface aging, whereas the wallpaper of the air purifying function of the present invention is coated on the outermost surface with such a spray coating, such as the appearance of aging of the wallpaper. It is possible to produce a wallpaper that does not damage.

(E) adding a binder

The binder addition in this step may be optionally included instead of an essential step, and may be performed at any step between the above steps, but most preferably after step (c). In this case, triethyl ortho silicate and gamma glycidoxy propyl trimethoxysilane are used alone or in combination, and the amount of addition is preferably 0.01 to 0.20 mol based on 1 mol of the titanium compound. The silver should be within 120 minutes after the binder is added.

An embodiment of the method for manufacturing the air purifying function wallpaper of the present invention comprising the above steps may include the following method.

(a) reacting isopropanol with titanium (IV) isopropoxide and diacetylmethane as a chelating agent,

(b) selecting and dissolving 2-4 kinds of nitrates of Zn, Cu, Fe, Mn, Li, Ag as metal compounds in distilled water;

(c) slowly adding the solution obtained in step (A) to the solution obtained in step (B) in the temperature range from room temperature to 90 ° C. and adding nitric acid with an acid catalyst while stirring at 90 rpm or more for 2 hours;

(d) adding triethylorthosilicate and gamma glycidoxypropyltrimethoxysilane alone or in combination as a binder to prepare a visible photocatalyst; And

(e) coating the visible photocatalyst on a wallpaper

Hereinafter, the present invention will be described in more detail with reference to the following examples. The following examples are provided to illustrate the present invention, but the scope of the present invention is not limited by the scope of the examples.

Example

In one reactor, 142 g of titanium (IV) isopropoxide, 72 g of isopropanol, and 10 g of diacetylmethane are reacted at room temperature for 30 minutes. 2 reactors, 760 g of distilled water, 1.4 g of iron nitrate, 2.6 g of zinc nitrate, and 1.8 g of copper nitrate were added and stirred at 400 rpm to completely dissolve the metal salt. After slowly adding the solution of one reactor to the second reactor, 1.6 g of nitric acid was dropped and the temperature was raised to 80 ° C., followed by reaction for 3 hours. Finally, 7.6 g of triethylorthosilicate was added and reacted for 1 hour to produce a transparent visible light active titanium dioxide-based photocatalyst.

The prepared photocatalyst is coated on the wallpaper surface. The coating method was spray method, the coating amount is 1 ~ 20g / ㎡.

Comparative example

The wallpaper without the photocatalyst was used.

Experimental Example  One

Formaldehyde gas reduction rate measurement test of the transparent visible photocatalyst prepared according to Comparative Examples and Examples of the present invention was carried out as follows. The test piece was placed in a Tedlarbag, sealed by injecting 80 ppm of formaldehyde gas, and the test piece was measured in a fluorescent lamp for 120 minutes in units of 30 minutes (once). The test piece was tested again and again and measured by 120 minutes in 30 minutes (2 times), and the test piece was measured again and again (3 times) at the supersaturated concentration of formaldehyde gas, and the results are shown in Table 1, respectively. (Comparative Example) and Table 2 (Example), which are shown graphically in FIG.

0min 30min 60min 90min 120 min 1 time 80 47.3 41.6 38.7 36.2 Episode 2 80 50.2 46.3 43.1 40.9 3rd time Supersaturation 61.7 58.8 57.3 56.7

0min 30min 60min 90min 120 min 1 time 80 25.6 20.5 15.1 12 Episode 2 80 26 18.8 14.4 11.2 3rd time Supersaturation 35.6 29.3 27 22.8

As can be seen from the results, it can be seen that the reduction rate of the formaldehyde gas of the embodiment is superior to the comparative example, and the reduction rate is maintained as the number of times increases.

Experimental Example  2

Except that the injection of formaldehyde gas at 70ppm in the first and second experiments were measured in the same manner as in Experimental Example 1, and the results are shown in Table 3 (Comparative Example) and Table 4 (Example), respectively, and FIG. Shown graphically.

0min 30min 60min 90min 120 min 1 time 70 46.8 35.1 27.3 25.5 Episode 2 70 63.4 59 55.1 53.6 3rd time Supersaturation 50.6 40.9 35.1 33.8

0min 30min 60min 90min 120 min 1 time 70 23.4 16.2 9.1 8.5 Episode 2 70 26 18.5 10.4 7.8 3rd time Supersaturation 33 27.6 22.2 20

Experimental Example  3

Except that the injection of formaldehyde gas at 100ppm in the first and second experiments were measured in the same manner as in Experimental Example 1, the results are shown in Table 5 (Comparative Example) and Table 6 (Example), respectively, Figure 3 Shown graphically.

0min 30min 60min 90min 120 min 1 time 100 48 40 36 33 Episode 2 100 58 53.3 49.7 47.4 3rd time Supersaturation 68.9 65 63 62.4

0min 30min 60min 90min 120 min 1 time 100 18 10 8 6 Episode 2 100 21.5 16.2 13 10.6 3rd time Supersaturation 50 40.7 36 32

1 to 3 is a test result data of measuring the formaldehyde gas reduction rate of the wallpaper according to the comparative example and the embodiment of the present invention.

Claims (13)

In the wallpaper consisting of a substrate layer, a printing layer and an air purification coating layer sequentially from below, the air purification coating layer is coated with a visible photocatalyst activated in the visible light region, the visible photocatalyst is a solvent, titanium compound, chelating agent, Air purification wallpaper comprising a metal compound and an acid catalyst. The method of claim 2, The visible light catalyst is an air purification wallpaper, characterized in that it further comprises a binder. The method of claim 2, The binder is triethyl ortho silicate, gamma glycidoxy propyl trimethoxy silane or a mixture thereof. The method of claim 1, The solvent is the air purification function wallpaper, characterized in that the alcohol of C1 ~ C4. The method of claim 4, wherein The alcohol is an air purification wallpaper, characterized in that the isopropanol. The method of claim 1, The titanium compound is an air purification wallpaper, characterized in that the titanium (IV) isopropoxide. The method of claim 1, The chelating agent is an air purification wallpaper, characterized in that ethylenediamine, tetraacetic acid (EDTA) or diacetylmethane. The method of claim 1, The metal compound is an air purification wallpaper, characterized in that the nitrate, sulfate or chloride of a metal selected from the group consisting of zinc, copper, iron, manganese, lithium and silver. The method of claim 1, The acid catalyst wallpaper, characterized in that hydrochloric acid, nitric acid, sulfuric acid or acetic acid. (a) reacting the alcohol by adding a titanium compound and a chelating agent; (b) dissolving the metal compound in distilled water; (c) adding a solution of step (a) to the solution of step (b) under an acid catalyst to prepare a visible photocatalyst; and (d) coating the visible photocatalyst on a wallpaper Method of manufacturing the air purification function wallpaper comprising a. The method of claim 10, The method of manufacturing the air purification wallpaper, characterized in that it further comprises the step of introducing a binder between the step (c) and step (d). (a) reacting isopropanol with titanium (IV) isopropoxide and diacetylmethane as a chelating agent, (b) selecting and dissolving 2-4 kinds of nitrates of Zn, Cu, Fe, Mn, Li, Ag as metal compounds in distilled water; (c) slowly adding the solution obtained in step (A) to the solution obtained in step (B) in the temperature range from room temperature to 90 ° C. and adding nitric acid with an acid catalyst while stirring at 90 rpm or more for 2 hours or more; (d) adding triethylorthosilicate and gamma glycidoxypropyltrimethoxysilane alone or in combination as a binder to prepare a visible photocatalyst; And (e) coating the visible photocatalyst on a wallpaper Method of manufacturing the air purification function wallpaper comprising a. The method according to any one of claims 10 to 12, The coating is a method of manufacturing the air purification wallpaper, characterized in that the spray coating.

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