KR20210024275A - Coating compounds capable of adsorbing particulate matters, vehicles with the coating compounds and city facility with the coating compounds - Google Patents

Abstract

The present invention relates to a coating solution for removing fine dust in the air and, more specifically, to a coating solution capable of absorbing fine dust, to a vehicle having a coating liquid on a surface thereof, and to an urban facility to which the coating solution is applied. The coating solution capable of absorbing fine dust comprises: at least one of 2 to 20 vol% of dipropylene glycol, 3 to 15 vol% of glycerin, and 0.1 to 1 vol% of butylene glycol; and water to adjust the remaining 100 vol%.

Description

Coating compounds capable of adsorbing particulate matters, vehicles with the coating compounds and city facility with the coating compounds}

The present invention relates to the removal of fine dust in the air, and more particularly, a coating liquid capable of absorbing fine dust, a vehicle having a coating liquid on the surface. And to an urban facility to which the coating liquid is applied.

As the industry develops, the concentration of PM10 particulate matter (PM), PM2.5 (fine particulate matter) and its precursors (hereinafter referred to as "fine particulate matter") in the atmosphere is increasing significantly. The fine dust precursor is a generic term for gaseous substances that become fine dust by causing a secondary chemical reaction in the atmosphere, such as nitrogen oxides (NOx), sulfurous acid gas (SO _{2 ), and volatile organic compounds (VOCs).} Such fine dust is known to have a very harmful effect on the human body so that it is designated as a first-class carcinogen by the World Health Organization (WHO). So, when the concentration of fine dust is very high, such as smog or yellow dust, which occurs frequently recently, it is better to refrain from going out as much as possible to protect your health from fine dust.

According to information released by the Ministry of Environment Air Quality Annual Report 2017, in several large cities in the fine dust concentration in Seoul 44μg / m ³ of high as three times that of London of 14μg / m ^3, about 1.3 times that of LA 33μg / m ³ Can be seen. In addition, the recent high-density fine dust advisory in Seoul was 5 times and 10 days, and the trend is steadily increasing.

Therefore, in order to remove such fine dust, various types of air purifiers, dust collectors, filters, and the like have been developed. Particularly, fine dust is largely contained in automobile exhaust gas or exhaust gas from factory chimneys, and thus has emerged as a major problem in large cities or industrial complexes.

To this end, in the conventional patent registration No. 10-1925825 (urban fine dust removal device using a running vehicle) or 10-0725996 (vehicle dust collecting device), a dust collecting device (or filter) is installed on a running vehicle. I did. As a result, as the vehicle travels, it is a method of filtering fine dust contained in the headwind.

However, in such a conventional method, since the filter has a lifetime, the filter has to be periodically removed, washed, dried, reused, or replaced with a new product. Therefore, such a conventional method has a high maintenance cost, and the treatment of the waste filter has emerged as a problem causing secondary pollution.

Accordingly, researches on a technology capable of economically and effectively removing fine dust in the atmosphere by using a number of vehicles running in a large city or urban transportation facilities are constantly being continued.

1. Korean Patent Registration No. 10-1925825 (Urban fine dust removal device using a vehicle in operation), 2. Korean Patent Publication No. 10-2015-0116014 (dust filtering system applicable to public transportation), 3. Korean Patent Registration No. 10-0725996 (Vehicle Dust Collector), 4. Korean Patent Publication No. 10-2010-0125957 (Hybrid washing vehicle for high-speed driving of tracks in subway tunnels).

Therefore, the present invention has been devised to solve the above problems, and the problem to be solved of the present invention is that it is possible to absorb fine dust that can remove fine dust in the atmosphere by using a running vehicle or urban facility. Vehicles with coating liquid and coating liquid on their surface. And it is to provide a city facility to which the coating liquid is applied.

Another object of the present invention is a vehicle having a coating liquid and a coating liquid on the surface capable of easily forming a coating layer capable of absorbing fine dust by a driving vehicle, and capable of absorbing fine dust that can be easily washed and removed. And it is to provide a city facility to which the coating liquid is applied.

Another object of the present invention is to prevent the coating layer formed on the surface of the vehicle from evaporating easily during driving, thereby continuously maintaining the ability to absorb fine dust, a coating solution capable of absorbing fine dust, a vehicle having a coating solution on the surface. And it is to provide a city facility to which the coating liquid is applied.

Another object of the present invention is a vehicle having a coating liquid and a coating liquid on the surface capable of absorbing safe fine dust because there is no generation of ozone from the coating liquid, even if it is used in the summer when the sun is strong and the temperature is high. And it is to provide a city facility to which the coating liquid is applied.

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those of ordinary skill in the technical field to which the present invention belongs from the following description. It will be understandable.

In order to achieve the above technical problem, dipropylene glycol 2 to 20% by volume; 3-15% by volume of glycerin; And butylene glycol 0.1 to 1% by volume; containing at least one of, and water for adjusting the remaining 100% by volume; a coating solution capable of absorbing fine dust is provided.

In addition, the dipropylene glycol is preferably 5 to 10% by volume.

In addition, it is preferable that glycerin is 5 to 10% by volume.

An object of the present invention as described above, the above-described coating solution; And a vehicle in which the coating liquid is formed on the surface; thereby, fine dust is absorbed in the coating liquid while the vehicle is running, and may be achieved by a vehicle having a coating liquid on the surface.

In addition, the vehicle may be any one of a bus, a taxi, a passenger car, a train, a subway, an airplane, and a drone.

An object of the present invention as described above, the above-described coating solution; And urban facilities in which the coating liquid is applied on the surface; by including, fine dust is absorbed by the coating liquid in which evaporation is suppressed.

In addition, urban facilities include at least one of street trees, street lights, soil, traffic lights, road signs, guard rails, overpasses, piers, bridges, exterior walls of buildings (including city wall surface greening), soundproof walls, and sidewalk blocks.

According to an embodiment of the present invention, fine dust in the atmosphere can be easily absorbed and removed by simply running the vehicle without installing a separate mechanical device. Accordingly, there is an effect that the concentration of fine dust gradually decreases as public transportations such as buses, taxis, and subways, which are examples of vehicles, are frequently operated.

In addition, when the vehicle after the operation is returned to the garage, it is possible to easily remove the coating layer and fine dust through automated washing, and there is a speed, economy, and convenience that can be re-coated with a coating solution again.

In addition, it is possible to continuously maintain the ability to absorb fine dust by suppressing the coating layer formed on the surface of vehicles or urban facilities from evaporating well by the wind.

In addition, even if it is used in the summer when the sun is strong and the temperature is high, it is safe because ozone is not generated from the coating liquid, and secondary environmental pollution due to ozone can be prevented.

However, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. I will be able to.

The following drawings attached in the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention to be described later. It is limited only to and should not be interpreted.
1 is a graph showing the moisture evaporation rate by time of the coating solution experiment 1 according to an embodiment of the present invention
2 is a graph showing the moisture evaporation rate by time of the coating solution experiment 2 according to an embodiment of the present invention
3 is a graph comparing the evaporation rates of dipropylene glycol and propylene glycol used in the present invention,
4 to 6 are examples of photographs taken with a microscope of a coating liquid absorbing fine dust.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be variously changed and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereto.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between components, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as “comprise” or “have” refer to the specified features, numbers, steps, actions, components, parts, or these. It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in commonly used dictionaries should be interpreted as having meanings in the context of related technologies, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

Coating liquid

The coating liquid forms a film with a certain thickness on the surface of vehicles or urban facilities, retains moisture while driving or does not evaporate well by the wind, and absorbs fine dust in the air by colliding with the air. The coating layer formed by such a coating liquid has a property of being easily peeled and removed with respect to high-pressure washing water. The coating solution for satisfying these conditions has the following composition ratio.

First, the coating solution of the first embodiment is 2 to 20% by volume of dipropylene glycol; 3-15% by volume of glycerin; And butylene glycol 0.1 ~ 1% by volume; containing at least one of; and water to match the remaining 100% by volume; includes.

Depropylene gylcol is well mixed with water, has a strong moisturizing function, and is not volatile. If dipropylene glycol is less than 2% by volume, the effect of inhibiting evaporation of moisture is insignificant, and the coating liquid is easily evaporated. In addition, when the content of dipropylene glycol exceeds 20% by volume, there is no significant change in the water evaporation rate, and only the economic burden of purchasing raw materials increases. Dipropylene glycol has an effective moisture evaporation inhibition effect of 2 to 20% by volume, and the optimum composition ratio is 5 to 10% by volume, considering the economics of the component. Such dipropylene glycol may be a single component of the coating liquid together with water.

In addition, glycerin (Glycerin, Glycerol) is a component that is well mixed with water and is widely used as a wetting agent or floating agent. It is preferable that glycerin is 3 to 15% by volume. If glycerin is less than 3% by volume, the effect of inhibiting evaporation of moisture is insignificant, and the coating liquid is easily evaporated. And, even if the glycerin exceeds 15% by volume, there is no significant change in the water evaporation rate. More preferably, the effective moisture evaporation inhibition effect of glycerin is 5 to 10% by volume. Such glycerin may be a single component of the coating liquid together with water.

Butylene glycol is an odorless viscous liquid that is mainly used as a solvent for cosmetics and has a function of dissolving constituents. In addition, butylene glycol has a moisturizing function that attracts moisture, thus inhibiting evaporation of moisture. It is preferable that the butylene glycol is mixed in the range of 0.1 to 1% by volume. Butylene glycol may be 0 to less than 0.1% by volume, but it is preferable to contain at least 0.1% by volume in order to enhance the moisture suppression effect. When the butylene glycol exceeds 1% by volume, the viscosity of the coating liquid may increase, making it difficult to spray.

Vehicles and urban facilities

The above-described coating liquid is coated on the surface of vehicles or urban facilities in the form of spray spray. The term "vehicle" described in the specification of the present invention means a means of transportation or a movable vehicle, typically buses, taxis, cars, trains, subways, boats, drones, bicycles, personal mobility (eg, Segway), motorcycles, It could be an airplane, etc.

For example, in the case of a bus, a certain amount (eg, 1 ℓ/min) of coating liquid is sprayed on the outer surface of the bus within a certain booth for a certain amount of time (eg, 30 seconds). If necessary, the front or windshield of the bus may be covered with a separate cover (not shown) so that the coating solution is not coated.

Then, the bus transports passengers while traveling along a defined route. At this time, as air in the atmosphere collides with the coating layer, fine dust is collected in the coating layer. The collected fine dust stays in the coating layer due to surface tension and the like. Considering that route buses pass through a heavily polluted center, it can be seen that absorption and removal of fine dust while driving is very effective in lowering the concentration of fine dust in large cities.

Then, the bus returns to the garage again. Then, high-pressure washing water is sprayed on the surface of the bus to wash the coating layer and fine dust. Washing water, coating liquid and fine dust flowing down are collected in a separate tank and then subjected to purification treatment. Therefore, it is possible to effectively purify wastewater while preventing secondary pollution due to fine dust.

If necessary, it can be re-coated with a coating solution and start running again. As the process of coating-operation-washing-recoating-operation is repeated, it is possible to efficiently remove fine dust in urban areas. If necessary, it is possible to recoat in a state where fine dust adheres to the coating agent by going through the process of coating-operation-recoating-operation-washing. In this case, re-coating is possible to concentrate on the rear side of the vehicle, since a lot of air is congested on the rear side of the vehicle when the vehicle is driven.

In addition, in the embodiments of the present invention, "urban facilities" may be street trees, street lights, soil, traffic lights, road signs, guard rails, overpasses, piers, bridges, exterior walls of buildings (including wall greening), soundproof walls, and sidewalk blocks. However, urban facilities are not limited to those listed, and include various facilities along roads, structures related to buildings, and underground facilities.

Experimental example

Experiment 1

In Experiment 1 of the coating solution, 7 vol% of dipropylene glycol, 7 vol% of glycerin, 1 vol% of butylene glycol, and 85 vol% of water were mixed.

When the relative humidity was 40% and the air temperature was 30°C, the prepared coating solution was sprayed onto the surface of the vehicle to form a film, and then the vehicle was driven to observe the evaporation rate of the coating solution and the state of collecting fine dust by time. The experimental results are shown in FIG. 1. 1 is a graph showing the moisture evaporation rate over time of the coating solution experiment 1 according to an embodiment of the present invention. As shown in FIG. 1, it can be seen that the evaporation rate of 54.1% is shown after 24 hours after the coating liquid is formed. Considering that it takes about 3 to 4 hours for the public transportation bus to depart from the garage, pass the route, and return to the garage again, the coating liquid evaporates to less than 10% and retains about 90% to absorb fine dust. You can see that you can.

Experiment 2

In Experiment 2 of the coating solution, 4% by volume of dipropylene glycol, 4% by volume of glycerin, 0.3% by volume of butylene glycol, and 91.7% by volume of water were mixed. In the same conditions as in Experiment 1, when the relative humidity was 40% and the air temperature was 30°C, the prepared coating solution was sprayed onto the surface of the vehicle to form a film, and then the vehicle was driven to observe the evaporation rate of the coating solution by time and the state of collecting fine dust. The experimental results are shown in FIG. 2. 2 is a graph showing the moisture evaporation rate over time of the coating solution experiment 2 according to an embodiment of the present invention. As shown in FIG. 2, it can be seen that the evaporation rate of 63.7% is shown after 24 hours after the coating liquid is formed.

In contrast to Experiment 1, it was confirmed that the lower the component content of dipropylene glycol, glycerin, and butylene glycol, the higher the water evaporation rate. This is evidence that dipropylene glycol, glycerin, and butylene glycol are effective as evaporation inhibitors, and within an acceptable range, it was found that the higher the concentration, the higher the effect of inhibiting moisture evaporation and maintaining moisture.

Experiment 3

Experiment 3 is an experiment in which the evaporation rate was compared with 10% by volume of dipropylene glycol and 90% by volume of water with 10% by volume of propylene glycol and 90% by volume of water. Experimental conditions are 80% relative humidity and 25 ℃ ambient temperature. The experimental results are shown in FIG. 3. 3 is a graph comparing the evaporation rates of dipropylene glycol and propylene glycol used in the present invention. As shown in FIG. 3, after 48 hours after spraying, the evaporation rate of the dipropylene glycol aqueous solution is 44.9%, and the evaporation rate of the propylene glycol aqueous solution is 64.2%. That is, it can be seen that the dipropylene glycol aqueous solution has a lower evaporation rate, so that the effect of suppressing the evaporation of moisture is more excellent. It can be seen that the contrast of the evaporation rate increases with time. In particular, since dipropylene glycol is not a precursor for generating ozone, it is more suitable for use in summer when the sun is strong and the temperature is high.

4 to 6 are examples of photographs taken with a microscope of a coating liquid absorbing fine dust. 4 to 6, it can be seen that a lot of fine dust (black particles) is trapped in the coating liquid. Therefore, when the effect of suppressing evaporation of moisture is exhibited by the coating liquid of the present invention, the moisture may be exposed to the atmosphere without drying for a long time even while the vehicle is running. And, at this time, the fine dust in the atmosphere is collected into the coating liquid, thereby exerting the effect of removing the fine dust.

Detailed description of the preferred embodiments of the present invention disclosed as described above has been provided to enable those skilled in the art to implement and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, a person skilled in the art may use the components described in the above-described embodiments in a manner that combines with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the detailed description above should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, the embodiments may be configured by combining claims that do not have an explicit citation relationship in the claims, or may be included as new claims by amendment after filing.

Claims (7)

2 to 20% by volume of dipropylene glycol;
3-15% by volume of glycerin; And
Butylene glycol 0.1 to 1% by volume; containing at least one of, and
A coating solution capable of absorbing fine dust, comprising: water to meet the remaining 100% by volume. The method of claim 1,
The dipropylene glycol is a coating solution capable of absorbing fine dust, characterized in that 5 to 10% by volume. The method of claim 1,
The glycerin is a coating solution capable of absorbing fine dust, characterized in that 5 to 10% by volume. The coating liquid according to any one of claims 1 to 3; And
By including a vehicle in which the coating liquid is formed on the surface
A vehicle having a coating liquid on its surface, characterized in that fine dust is absorbed by the coating liquid while the vehicle is running. The method of claim 4,
The vehicle is a vehicle having a coating liquid on the surface, characterized in that any one of buses, taxis, passenger cars, trains, subways, airplanes, and drones. The coating liquid according to any one of claims 1 to 3; And
By including; urban facilities in which the coating liquid is applied to the surface
Urban facilities coated with a coating solution, characterized in that fine dust is absorbed by the coating solution in which evaporation is suppressed. The method of claim 6,
The urban facilities include at least one of street trees, street lights, soil, traffic lights, road signs, guard rails, overpasses, bridges, bridges, exterior walls, soundproof walls, and sidewalk blocks.

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