KR101042283B1 - Functional boundary block having pollution control ability and process for the preparation thereof - Google Patents

Abstract

PURPOSE: A functional boundary block having pollution prevention function and a manufacturing method thereof are provided to clean up pollutants accumulated on the surface of a boundary block easily in the daytime and nighttime, and to purify air by preventing the adhesion of nitrogen oxides and volatile organic compound emitted from automobile exhaust gas. CONSTITUTION: A functional boundary block having pollution prevention function includes a catalyst layer formed on the surface of a boundary block and made with titanium phosphate as a main component. A manufacturing method of a functional boundary block comprises the steps of washing the surface of a boundary block with high pressure water and drying the surface, and applying a composition using titanium phosphate as a main component by a spray process, an impregnation process or a dipping coating process, and then drying naturally or treating with heat, thereby forming a titanium phosphate sol coating layer.

Description

FUNCTIONAL BOUNDARY BLOCK HAVING POLLUTION CONTROL ABILITY AND PROCESS FOR THE PREPARATION THEREOF}

The present invention relates to a functional boundary block having a function of preventing pollution and removing air pollution through a hydrophilic function and a method of manufacturing the same. More specifically, a catalyst layer comprising titanium phosphate as a main component is formed on a surface of a boundary block made of granite or cement. The present invention relates to a functional boundary block and a method of manufacturing the same.

Boundary blocks are usually made of granite or cement, and are used to separate the boundary between the sidewalk and the sidewalk or between the driveway and the sidewalk. In particular, the boundary block used between the driveway and the sidewalk is easily contaminated with the surface by dust, soot, and other dust or dirt generated from the vehicle moving on the road.

However, in order to clean the contaminated boundary block, it takes a lot of manpower and time, such as cleaning the boundary block by using a high-pressure sprayer, or using a brush or cleaning agent, and there is a risk of traffic congestion and traffic accident because it works around the road. There is this.

In order to solve this problem of the boundary block, a photocatalyst having hydrophilicity and organic decomposition ability can be coated and used, but since the photocatalyst functions as a catalyst only in the presence of light, it is difficult to obtain a hydrophilic effect at night or in a place where UV is scarce. The reality is that air pollution elimination function is weak.

In addition, when the conventional photocatalyst is coated on the boundary block by dipping or spraying, there is a problem in that the hardness is low as low as about 4 to 6H of the coating film, so that the effect is not maintained for a long time.

Accordingly, the inventors of the present invention continue to develop functional boundary blocks capable of preventing pollution and removing air pollution through hydrophilic functions while solving the above problems, while titanium phosphate is formed on the surface of boundary blocks made of granite or cement. By forming a layer composed mainly of, the adsorbed pollutants can be removed without any additional washing to maintain clean boundary blocks at all times, and also contribute to air purification by removing nitrogen oxides and air pollutants generated from exhaust gas of automobiles. It was found that the present invention was completed.

The present invention is to provide a functional boundary block that can clean the atmosphere by easily cleaning the contaminants accumulated on the surface of the boundary block during the day and night and prevent the adhesion of nitrogen oxides and volatile organic compounds from the exhaust gas of the vehicle. .

Another object of the present invention relates to a method of manufacturing the above-described functional boundary block.

In order to achieve the above object, the present invention provides a functional boundary block, characterized in that a catalyst layer composed mainly of titanium phosphate is formed on the surface of the boundary block.

In order to achieve the above object, in the present invention, the surface of the boundary block is washed with high-pressure water, dried, and then coated with a composition containing titanium phosphate as a spray process, an impregnation process, or a dipping coating process, followed by natural drying or heat treatment. It provides a method for producing a functional boundary block characterized in that to form a titanium phosphate sol coating layer by performing a process.

The boundary block having a titanium phosphate layer according to the present invention can always maintain a clean boundary block by removing the adsorbed contaminants without additional washing, and by decomposing and removing nitrogen oxides and air pollutants generated from the exhaust gas of automobiles. It can also contribute to air purification. In addition, since there is no separate washing process for the boundary block, time and cost can be saved, and economical effects such as being not impeded by traffic flow are also expected to be useful in the art.

Figure 1 shows a perspective view of a conventional block road boundary block.
2 illustrates a method of manufacturing a boundary block according to the present invention.
3 is a cross-sectional view of a boundary block coated with a catalyst composition mainly composed of titanium phosphate according to the present invention.
Figure 4 shows the effect of removing harmful substances of the functional boundary block of the present invention.

The technical terms and scientific terms used in the present invention can be construed as meaning ordinary meanings understood by those of ordinary skill in the art without departing from the scope of the present invention.

The functional boundary block of the present invention is characterized in that a layer containing titanium phosphate as a main component is formed on the surface of the existing boundary block, and the boundary block of the present invention can prevent adhesion as well as cleaning contaminants attached to the surface.

The titanium phosphate sol used in the present invention overcomes the disadvantages of the photocatalyst made of titanium dioxide as the main raw material, and trivalent ozone and divalent oxygen are generated by surface reaction with only oxygen and water (H 2 O) in the air, even in a dark room without light. This oxygen is unstable, repeating the oxidation and reduction reaction between trivalent and divalent, and O2- purified by the reduction of oxygen forms peroxide in addition to the oxidation reaction intermediate, and has strong oxidizing power through hydrogen peroxide. It becomes a radical (-OH) and decomposes harmful substances by strong oxidation of organic substances attached to the surface, and has a hydrophilic effect to prevent pollution.

In order to coat the titanium phosphate sol on the surface of the boundary block, the boundary block is washed with high pressure water, dried, and the titanium phosphate sol is coated by spraying, impregnation, or dipping coating to form a titanium phosphate layer on the boundary block surface. It has a self-cleaning function so that contaminants such as dust and soot can be easily washed out with water by keeping the contact angle with water below 10 degrees, and nitrogen emitted from automobile exhaust gas through the radical hydroxide generated on the surface. By preventing adhesion of oxides and volatile organic compounds, air pollutants are purified.

In the present invention, the surface of the boundary block is washed with high-pressure water, dried, and then the catalyst composition mainly composed of titanium phosphate is applied by spraying, impregnating, or dipping coating, followed by a natural drying or heat treatment process. It provides a method for producing a functional boundary block characterized in that to form a coating layer.

In the present invention, the catalyst composition mainly composed of titanium phosphate sol is coated on the uppermost layer of the boundary block.

The titanium phosphate sol is a titanium compound formed by mixing a titanium compound present in about 2 to about 3 times the molar amount of titanium atoms and alcohols having 1 to 4 alcohol groups, and a phosphoric acid (H 3 PO 4) diluted to 35 to 95% by weight. Titanium phosphate sol prepared in a stirrer with a rotational speed of 200 to 2,000 rpm is used.

Titanium phosphate sol used in the present invention may be represented by the following formula (1):

[Formula 1]

Ti (OH) x (PO4) y (HPO4) z (H2PO4) l (OR) m

Where

R is an alkyl group having 1 to 4 carbon atoms,

x, y, z, l and m each satisfy a value of 0 or more and x + 3y + 2z + l + m = 4.

In the present invention, the method of coating the catalyst composition mainly composed of titanium phosphate sol on the surface of the boundary block may be used by a method such as spray, impregnation, and dip coating, and then heat treatment or hot air. The method of drying and firmly firing the coated film is applied.

Figure 1 shows a perspective view of the boundary block, such boundary blocks are used in the form of a straight or curved line for the purpose of separating the boundary between the sidewalk and the sidewalk or the roadway and the sidewalk using granite, cement and the like.

In order to coat the titanium phosphate sol on the boundary block, first, there should be no foreign matter on the surface of the boundary block, which may be washed with high pressure water of 2.0 kgf / cm 2 or by blowing with high pressure air of 6.0 kgf / cm 2. In case of washing with high pressure water, it should be kept away from moisture, and it should be air dried or hot air for more than 1 hour.

Then, the titanium phosphate sol is sprayed at an injection pressure of 0.5 to 6.0 kgf / cm 2 so as to form a coating amount of 50 to 500 mg / m 2 so that the catalyst layer can be formed on the boundary block surface, and the coated film is cured at room temperature to cure. Drying for 30 minutes or heat treatment for 1 to 3 minutes through an infrared ray of 80 to 250 ℃.

In addition, the titanium phosphate sol coating may be carried out in the manufacturing step of the boundary block, even if the boundary block is already installed may be performed by the above spray method after cleaning the surface.

2 is a cross-sectional view of a boundary block surface coated with a composition mainly composed of titanium phosphate of the present invention. As shown in FIG. 2, the surface of the boundary block coated with the titanium phosphate sol forms a titanium phosphate film having a thickness of 50 to 500 mg / m 2, and the photocatalyst causes a strong photo-oxidation reaction by the incident ultraviolet light, thereby naturally causing organic matter, etc. Disassemble it. That is, the oil component and the like adhering to the surface are decomposed and removed, and the contamination such as dust and dust is difficult to accumulate. Figure 3 shows the principle of removing harmful substances of the functional boundary block of the present invention.

Therefore, the boundary block including the layer containing titanium phosphate as a main component, surface reaction occurs only with oxygen and water (H2O) in the air during the day and at night to generate trivalent ozone and divalent oxygen, the oxygen is unstable to 3 Repeated oxidation and reduction reactions between valent and divalent, O2- purified by the reduction of oxygen forms the peroxide in addition to the intermediate of the oxidation reaction, and becomes the active hydroxyl radical (-OH) which has strong oxidizing power through hydrogen peroxide. The organic matter attached to it decomposes harmful substances by powerful oxidation, and it has a hydrophilic effect to prevent pollution.

Hereinafter, the present invention will be described in more detail based on the following examples. However, the following examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

Example 1 Manufacture of Boundary Block with Titanium Phosphate Layer

(Step 1)

Rotational speed per minute is 200 by mixing the titanium compound formed by mixing the titanium compound present at about 2 to about 3 times the molar amount of titanium atom and the alcohol having 1 to 4 alcohol groups with the phosphoric acid (H 3 PO 4) diluted to 35 to 95% by weight. A catalyst composition composed mainly of titanium phosphate sol was prepared by stirring in a stirrer rotating at ˜2,000 rpm.

(Step 2)

The catalyst composition mainly composed of the titanium phosphate sol obtained in the step 1 was spray-sprayed at an injection pressure of 0.5 to 6.0 kgf / cm 2 to form a coating amount of 50 to 500 mg / m 2, and the coated film was cured at room temperature. Dried for 30 minutes.

Test Example 1 Measurement of Hydrophilic Effect

30 g of the titanium phosphate sol prepared in Step 1 of Example 1 was spray-sprayed on a 100 mm X 100 mm glass specimen and dried for 24 hours to initiate BLB irradiation (local: 1 mW / cm 2) to measure the hydrophilization rate. Photocatalysts were used to compare test samples in the same manner. The results are shown in Table 1 below.

division 0 hr 3 hr 6 hr 12 hr 24 hr Titanium Phosphate Sol 3.7 3.4 3.1 4.6 4.2 Photocatalyst sol 80.0 43.1 10.6 5.6 2.0

As shown in Table 1, it can be seen that the specimen coated with the titanium phosphate sol of the present invention has an excellent hydrophilic effect as compared to the conventional photocatalyst sol.

Test Example 2: Measurement of Hydrophilic Effect

30 g of the titanium phosphate sol prepared in Step 1 of Example 1 was spray-sprayed on a 100 mm X 100 mm glass specimen, dried for 24 hours, and then hydrophilized at a contact angle of 5 degrees or less, and the test specimen was left in a dark place, 0, 3, Contact angles were measured at 6, 12 and 24 hours. Test samples were compared in the same manner using existing photocatalyst sol. The results are shown in Table 2 below.

division 0 hr 3 hr 6 hr 12 hr 24 hr Titanium Phosphate Sol 4.9 6.9 5.5 6.6 7.2 Photocatalyst sol 1.3 8.5 8.6 7.0 11.2

As shown in Table 2, it can be seen that the specimen coated with the titanium phosphate sol of the present invention has an excellent hydrophilic effect as compared to the conventional photocatalyst sol.

Test Example 3: Removal of Hazardous Substances

50 g of the titanium phosphate sol prepared in Step 1 of Example 1 was applied to a 100 mm X 100 mm specimen, dried for 24 hours, placed in a 2 L test container, and tested for deodorizing effect of ammonia and formaldehyde under dark conditions using a gas detection tube method (test Institution of Korea Yarn Textile Testing & Research Institute). The results are shown in Table 3 below. In addition, Figure 4 shows the effect of removing harmful substances of the functional boundary block of the present invention.

division 5 minutes 15 minutes 30 minutes 60 minutes ammonia > 98.6 > 98.6 > 98.6 > 98.6 Formaldehyde 31.6 56.0 66.7 75.5

As shown in Table 3, the specimen to which the titanium phosphate sol of the present invention is applied can be seen that the effect of removing harmful substances and preventing adhesion.

The functional boundary block having a titanium phosphate layer according to the present invention can always maintain a clean boundary block by removing the adsorbed contaminants without a separate washing, and decomposes and removes nitrogen oxides and air pollutants generated from exhaust gases of automobiles. This can also contribute to air purification. In addition, since there is no separate washing process for the boundary block, time and cost can be saved, and economical effects such as being not impeded by traffic flow are also expected to be useful in the art.

100: boundary block 200: catalyst layer
300: pollutant 400: hydrophilic effect

Claims (7)

Hydrophilic boundary block to prevent the adhesion of contaminants coated with titanium phosphate layer that kept the contact angle between titanium phosphate layer and water on the boundary block surface to 10 degrees or less by spraying a composition mainly composed of titanium phosphate on the surface of the boundary block. . The method of claim 1,
Hydrophilic boundary block for preventing the adhesion of contaminants to which the titanium phosphate layer is applied, wherein the ansin titanium is represented by the following general formula (1):
Formula 1
Ti (OH) x (PO4) y (HPO4) z (H2PO4) l (OR) m
Where
R is an alkyl group having 1 to 4 carbon atoms,
x, y, z, l and m each satisfy a value of 0 or more and x + 3y + 2z + l + m = 4. The method of claim 1,
A hydrophilic boundary block for preventing contaminants adhered to the titanium phosphate layer, characterized in that the titanium phosphate layer is formed in a coating amount of 50 to 500 mg / m 2. The titanium phosphate layer is applied by washing the surface of the boundary block with high-pressure water, drying, spray-spraying a composition mainly composed of titanium phosphate, and forming a titanium phosphate layer by performing a natural drying or heat treatment process. A method of making a hydrophilic boundary block to prevent adherence of contaminants. The method of claim 4, wherein
Titanium phosphate as a main component is sprayed at a spray pressure of 0.5 to 6.0 kgf / ㎠ to apply to form a coating amount of 50 to 500 mg / ㎡ to prevent adhesion of the titanium phosphate layer is applied Method for producing a hydrophilic boundary block for. The method of claim 4, wherein
A method of producing a hydrophilic boundary block for preventing the adhesion of contaminants to which the titanium phosphate layer is applied, wherein the natural drying is performed at room temperature for 30 minutes. The method of claim 4, wherein
A method of manufacturing a hydrophilic boundary block for preventing contaminants adhered to a titanium phosphate layer, characterized in that the heat treatment is performed for 1 to 3 minutes through infrared rays at 80 to 250 ° C.

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