KR101380839B1 - Oil collecting structure, and the preparation method thereof - Google Patents

Abstract

The present invention relates to an oil collecting structure and a method for producing an oil collecting structure, in particular, a hydrophilic polymer layer is coated on the surface of the mesh support, characterized in that the water-resistant enhancer is further coated on the surface of the hydrophilic polymer layer. Provide an oil collection structure. The oil collection structure according to the present invention can pass through the water, and can be collected by separating only the oil, through which the oil existing on the surface can be collected without secondary pollution. In addition, by cross-linking the hydrophilic polymer formed on the surface of the structure to prevent the hydrophilic polymer is easily removed by the water it can further extend the service life of the structure of the present invention.

Description

Oil collecting structure, and the preparation method

The present invention relates to an oil collection structure and a method for producing an oil collection structure.

The sea occupies 70% of the earth's total surface area, and is rich in a variety of biological and mineral resources, a treasure trove of resources for human conservation. However, such as factory wastewater from large industrial complexes, domestic wastewater discharged from large cities, fertilizer components and contaminants caused by agricultural and livestock activities, and oil spills caused by large tanker accidents, and oil spills during onshore oil movements. Marine ecosystems are being devastated.

In particular, oil spilled from ships due to marine accidents destroys marine ecosystems not only in the early stages of spillage but also after oil collection, resulting in irreparable disaster for humanity. The spilled oil may be partially removed through control and purification, but most of the oil remains in the marine environment through complex weathering processes, causing catastrophic damage to various marine organisms. Can be minimized.

Meanwhile, centrifugal separation is a method for removing oil leaks in the sea, rivers, and rivers when oil is leaked due to ship operation, ship sinking accidents, oil accidents on land, oil refineries, oil tankers, oil pipelines, gas stations, etc. Using oil removal device that sucks oil mechanically or mechanically, chemical / biochemical treatment, incineration of effluent oil are used.

In particular, a method of spraying an oil emulsifier that neutralizes oil, a method of adsorbing oil with an oil adsorption cloth, collecting and treating the oil, and installing an oil diffusion preventing fence to prevent oil from spreading on the surface of the oil are used.

However, the suction method by the mechanical device has a problem that it is difficult to effectively process the oil because the water is also sucked with the oil. In addition, even if the waste oil on the surface is removed by using chemicals, the oil coagulates together with the chemical and precipitates. Therefore, even if the sea oil is removed, there is a problem of secondary environmental pollution caused by the precipitated residual oil. have. In addition, spraying the oil emulsifier may neutralize the oil, but there is a problem that water quality is contaminated by the chemical composition of the oil emulsifier, and installing an oil diffusion fence does not remove the oil floating on the water surface. .

Oil absorbing material that absorbs only oil is used as a method to solve this problem, and such oil absorbing material is a lipophilic nonwoven fabric or a plant, animal hair, etc. such as kapok, which expresses its own lipophilic properties. Oil absorbers produced in the form of (mat) are used. The lipophilic nonwoven fabric is generally a kind of pressing cotton made by needle punching the finely spun polypropylene fiber. The polypropylene fiber is lipophilic and can effectively absorb oil because the fiber has a very large surface area as the fibers are entangled. However, oil absorbents such as lipophilic nonwovens generally have a disadvantage that toxic gases may be generated during incineration after adsorbing oil.

In addition, in the case of marine oil spill accidents in Korea, the general process of oil spills is to prevent oil from spreading. The oil spilled into the tank is sucked out or sucked into the adsorber. However, even after oil is removed, there is a thin oil film called an oil film on the surface of the sea, and this oil film has a problem of disrupting the fish farm by blocking the oxygen supply in the water. Therefore, in the case of offshore oil spill, the most cost and effort is the oil film removal process.

On the other hand, Korean Patent No. 10-103211 discloses a method for absorbing oil by mixing the polypropylene and feathers such as ducks, geese, chickens to absorb the oil spilled into the sea or river bart And

Korean Patent No. 10-0725240 discloses a method of adsorbing oil spilled using a phenol resin foam as an oil adsorbent.

In addition, US Patent No. 6,391,120 discloses a method of adsorbing oil when the oil is leaked by using coconut shell fiber (coconut coir pith),

US Patent No. 7,655,149 discloses a method for adsorbing oil using kenaf balls.

US Patent No. 7,914,672 discloses a method of freezing oil using a critical fluid and then removing it.

However, although the methods disclosed in the prior document can be used locally for the removal and collection of oil, there is a problem of lack of economic feasibility.

Therefore, the inventors of the present invention while studying a method for collecting oil effectively, while coating a hydrophilic polymer layer on the mesh support to pass water between the support, to develop a structure that can separate and separate only the oil, the present invention Completed.

It is an object of the present invention to provide an oil collection structure and a method for producing an oil collection structure.

In order to achieve the above object,

The hydrophilic polymer layer is coated on the surface of the mesh support, and the surface of the hydrophilic polymer layer provides a structure for oil collection, characterized in that the water-resistant enhancer is further coated.

In addition,

Coating a hydrophilic polymer layer on the surface of the mesh support (step 1); And

It provides a method for producing an oil collection structure comprising; spraying a water-resistant enhancer solution on the surface of the hydrophilic polymer layer coated in step 1 (step 2).

Further,

Provided is a method for collecting oil present on the water surface using the oil collecting structure.

The oil collection structure according to the present invention can pass through the water, and can be collected by separating only the oil, through which the oil existing on the surface can be collected without secondary pollution. In addition, by cross-linking the hydrophilic polymer formed on the surface of the structure to prevent the hydrophilic polymer is easily removed by the water it can further extend the service life of the structure of the present invention.

1 is a schematic view showing an oil collection structure of the present invention;
2 is a graph showing the change in durability according to the crosslinking of the hydrophilic polymer;
3 is a graph showing the change in durability according to the addition of the water resistance enhancer;
4 and 5 are graphs measuring the contact angles of the hydrophilic polymer layers of Examples 1, 2, 3, 5, 6 and 7 and the hydrophilic polymer layers of Comparative Examples 1 to 6;
Figure 6 is a photograph showing the combination of the oil collection structure and the beaker and the transparent container for oil separation characteristics evaluation;
Figure 7 is a photograph showing the result of separating the oil by using a wire mesh (control) not coated with a hydrophilic polymer;
8 is a photograph showing the result of oil separation using the structure prepared in Comparative Example 3;
9 is a photograph showing the result of oil separation using the structure prepared in Comparative Example 2;
10 is a photograph showing the result of oil separation using the structure prepared in Comparative Example 1;
11 is a photograph showing the result of oil separation using the structure prepared in Example 3;
12 is a photograph showing the result of oil separation using the structure prepared in Example 2;
13 is a photograph showing the result of oil separation using the structure prepared in Example 1;
14 is a photograph showing the result of oil separation using the structure prepared in Comparative Example 8;
15 is a photograph showing the result of oil separation using the structure prepared in Comparative Example 9;
16 is a photograph showing the result of oil separation using the structure prepared in Comparative Example 10;
17 is a photograph showing the result of oil separation using the structure prepared in Example 4;
18 is a photograph showing the result of oil separation using the structure prepared in Example 5;
19 is a photograph showing the result of oil separation using the structure prepared in Example 6;
20 is a photograph showing the result of oil separation using the structure prepared in Example 7;

The present invention

The hydrophilic polymer layer is coated on the surface of the mesh support, and the surface of the hydrophilic polymer layer provides a structure for oil collection, characterized in that the water-resistant enhancer is further coated. Structure for oil collection according to the present invention is schematically shown through the figure of FIG.

Referring to Figure 1, the oil collection structure 10 according to the present invention is coated with a hydrophilic polymer layer 12 on the surface of the mesh support (11). That is, since the hydrophilic polymer layer 12 is formed on the surface of the support, water passes through the mesh of the mesh support, but oil does not pass, and only oil can be effectively collected therethrough.

In this case, the mesh support 11 may use a metal mesh, a nonwoven fabric, and the like, but it is preferable to use a metal mesh in terms of strength of the support, but is not limited thereto. In addition, the mesh support 11 may be in the form of a spherical or polygonal, preferably may be a circular or rectangular, but is not limited thereto.

The metal mesh is preferably a metal material such as stainless steel, aluminum, titanium, etc., but it is more preferable to use stainless steel having excellent strength, excellent corrosion resistance to water, and low cost, but is not limited thereto. no.

In addition, the mesh support is preferably a mesh of 10 to 500 mesh (mesh). If the mesh support exceeds 500 mesh, the mesh size is excessively small so that the mesh is closed by a hydrophilic polymer. If the mesh support is less than 10 mesh, the mesh size is excessively large. There is a problem that it is difficult to separate oil only.

On the other hand, in the oil collection structure according to the present invention, the hydrophilic polymer is polyethylene glycol (PEG), polyvinyl alcohol (PVA), polyvinylacetate (PVAc), (polyvinylpyrrolidone (PVP) and polyethylene oxide ( PEO) and carboxymethyl cellulose (CMC) can be used at least one polymer selected from the group consisting of.

In addition, the hydrophilic polymer layer is formed on the top of the hydrophilic polymer layer is coated, the water resistant agent may be formed on at least a portion of the surface of the hydrophilic polymer layer. The water resistance reinforcement is coated on the hydrophilic polymer layer to further improve the water resistance, thereby preventing the hydrophilic polymer layer from being peeled off or dissolved by water, thereby further extending the service life of the structure.

In this case, aluminum sulfate or ethylene carbonate may be used as the water resistance enhancer, and more preferably, aluminum sulfate and ethylene carbonate may be used together, but is not limited thereto. The hydrophilic polymer may be reacted with a hydrophilic polymer to improve water resistance. Materials may be used as appropriate.

In addition, the structure for oil collection according to the present invention can be enhanced in the water resistance by using a water-resistant reinforcing agent such as ethylene carbonate, and exhibit sufficient hydrophilicity to separate the oil, which has a hydrophilicity and cross-linked structure due to the ester group of the carbonate Because it is easy to form, it is not easily dissolved in water.

On the other hand, the hydrophilic polymer layer is preferably crosslinked. By crosslinking the hydrophilic polymer layer can exhibit a certain level of strength and water resistance to water, through which the service life of the oil collection structure according to the present invention can be further extended.

In addition,

Coating a hydrophilic polymer layer on the surface of the mesh support (step 1); And

It provides a method for producing an oil collection structure comprising; spraying a water-resistant enhancer solution on the surface of the hydrophilic polymer layer coated in step 1 (step 2).

Hereinafter, the manufacturing method of the oil collection structure according to the present invention will be described in detail for each step.

In the manufacturing method of the oil collection structure according to the present invention, step 1 is a step of coating a hydrophilic polymer layer on the surface of the mesh support.

In this case, the mesh support may be a metal mesh, non-woven fabric, and the like, in terms of the strength of the support is preferably a metal material such as stainless steel, aluminum, titanium, etc., the strength is excellent and corrosion resistance to water It is more preferable to use stainless steel which is excellent and inexpensive, but is not limited thereto.

In addition, the mesh support is preferably a mesh of 10 to 500 mesh (mesh). If the mesh support exceeds 500 mesh, the mesh size is excessively small so that the mesh is closed by a hydrophilic polymer. If the mesh support is less than 10 mesh, the mesh size is excessively large. There is a problem that it is difficult to separate oil only.

Further, the hydrophilic polymer layer coating of step 1 is polyethylene glycol (PEG), polyvinyl alcohol (PVA), polyethylene glycol (PEG), polyvinyl alcohol (PVA), polyvinylacetate (PVAc), (polyvinylpyrrolidone (PVP) and one or more polymers selected from the group consisting of polyethylene oxide (PEO) and carboxymethyl cellulose (CMC) are prepared by dissolving in a solvent to prepare a polymer solution, and coating the prepared polymer solution on a reticulated support. Can be.

At this time, the polymer solution preferably comprises a hydrophilic polymer in a composition of 10 to 50% by weight. If the polymer solution contains less than 10% by weight of the hydrophilic polymer, the hydrophilic polymer layer is formed to an excessively thin thickness, thereby there is a problem that can not exhibit sufficient hydrophilicity to separate the oil. In addition, when the polymer solution contains 50% by weight of the hydrophilic polymer, there is a problem that the coating on the mesh support is not easy as the excessive hydrophilic polymer is included.

In the manufacturing method of the oil collection structure according to the present invention, step 2 is a step of spraying a water-resistant strengthening agent solution on the surface of the hydrophilic polymer layer coated in the step 1.

The water-resistant reinforcing agent of step 2 is to improve the water resistance of the hydrophilic polymer layer, the water resistance of the hydrophilic polymer layer is improved by the water-resistant reinforcement, it is possible to use the oil collection structure for a longer time.

In this case, aluminum sulfate or ethylene carbonate may be used as the water resistant reinforcing agent, but more preferably, aluminum sulfate and ethylene carbonate may be used together, but is not limited thereto. Materials may be used as appropriate.

In addition, the water resistance enhancer solution comprises the water resistant enhancer in a composition of 10 to 20% by weight. At this time, when the water-resistant reinforcing agent solution contains a water-resistant reinforcing agent in a composition of less than 10% by weight, there is a problem that the reinforcing effect by the water-resistant reinforcing agent is not sufficiently expressed, and the aqueous solution has a composition in excess of 20 wt. In the case of inclusion, as the excess water-resistant reinforcing agent is added, a problem may occur that the hydrophilicity decreases at the same time as the water-resistant reinforcement.

The method for preparing an oil collection structure according to the present invention may further include crosslinking the hydrophilic polymer coated in step 1 before spraying the water resistant reinforcement solution of step 2. Through the crosslinking it is possible to improve the strength and water resistance of the hydrophilic polymer layer, through which it is possible to improve the service life of the oil collection structure produced according to the production method of the present invention.

At this time, the crosslinking is preferably carried out by radiation irradiation, it is preferable that the radiation is carried out with an irradiation amount of 10 to 100 kGy. If the irradiation is carried out at a dose of less than 10 kGy, there is a problem that the crosslinking of the hydrophilic polymer is not performed smoothly, if the irradiation is carried out at a dose of more than 100 kGy is irradiated with an excessive amount of radiation There is a problem in that economic losses occur.

Further,

Provided is a method for collecting oil present on the water surface using the oil collecting structure.

The oil collection structure is coated with a hydrophilic polymer layer on the surface of the mesh support, allowing water to pass but not passing oil, thereby effectively collecting only oil. Therefore, by using the oil collecting structure for collecting the oil present on the water surface, it is possible to effectively collect the oil spilled in place of the conventional oil absorbent, oil fence and the like.

At this time, the collection of the oil may be performed after the oil collection structure is provided at the rear of the ship, it is possible to effectively collect the spilled oil just by operating the ship to the oil spill area. However, the collection method of the present invention is not limited thereto, and the spilled oil may be collected using any suitable means or tool to which the structure can be applied.

Hereinafter, the present invention will be described more specifically by way of examples. However, the following examples are intended to illustrate the present invention, but the scope of the present invention is not limited by the following examples.

Example 1 Preparation of Structure for Oil Collection 1

Step 1: 20% by weight of polyvinyl alcohol, 15% by weight of polyethylene glycol and 65% by weight of purified water were stirred at a speed of 2000 rpm for 1 hour using a stirrer, which was coated on a 200 mesh stainless steel wire mesh. The wire mesh was then dried in an oven at 80 ° C. for about 1 hour to form a hydrophilic polymer layer.

Step 2: 10% by weight of aluminum sulfate, 5% by weight of ethylene carbonate and 85% by weight of purified water were stirred at a speed of 500 rpm for 1 hour using a stirrer, which was sprayed onto the hydrophilic polymer layer formed in Step 1. Thereafter, the wire mesh was dried in an oven at 80 ° C. for about 1 hour, thereby preparing a structure for collecting oil according to the present invention.

Example 2 Preparation of Oil Collecting Structure 2

After stirring 10% by weight of aluminum sulfate, 3% by weight of ethylene carbonate and 87% by weight of purified water in step 2 of Example 1 was carried out in the same manner as in Example 1 except for spraying the hydrophilic polymer layer for oil collection The structure was prepared.

Example 3 Preparation of Oil Collecting Structure 3

In step 2 of Example 1, after stirring 10% by weight of aluminum sulfate, 1% by weight of ethylene carbonate and 89% by weight of purified water, it was carried out in the same manner as in Example 1 except for spraying on a hydrophilic polymer layer for oil collection The structure was prepared.

Example 4 Preparation of Oil Collecting Structure 4

In the same manner as in Example 1 except that 20% by weight of polyacrylic acid was used instead of polyvinyl alcohol in Step 1 of Example 1, and 10% by weight of aluminum sulfate and 90% by weight of purified water were used in Step 2 A structure for oil collection was prepared.

Example 5 Preparation of Oil Collecting Structure 5

Except for using 20% by weight of polyacrylic acid instead of polyvinyl alcohol in Step 1 of Example 3 was carried out in the same manner as in Example 3 to prepare an oil collection structure.

Example 6 Preparation of Oil Collecting Structure 6

Except for using 20% by weight of polyacrylic acid instead of polyvinyl alcohol in Step 1 of Example 2 was carried out in the same manner as in Example 2 to prepare a structure for oil collection.

Example 7 Preparation of Oil Collecting Structure 7

Except for using 20% by weight of polyacrylic acid instead of polyvinyl alcohol in Step 1 of Example 1 was carried out in the same manner as in Example 1 to prepare a structure for oil collection.

Example 8 Preparation of Oil Collecting Structure 8

Step 1: 15% by weight of polyacrylic acid, 15% by weight of polyethylene glycol and 70% by weight of purified water were stirred at a speed of 2000 rpm for 1 hour using a stirrer, which was coated on a 200 mesh stainless steel wire mesh. The wire mesh was then dried in an oven at 80 ° C. for about 1 hour to form a hydrophilic polymer layer.

Step 2: 10% by weight of aluminum sulfate and 90% by weight of purified water were stirred for 1 hour at a speed of 500 rpm using a stirrer, which was sprayed onto the hydrophilic polymer layer formed in Step 1. Thereafter, the wire mesh was dried in an oven at 80 ° C. for about 1 hour, thereby preparing a structure for collecting oil according to the present invention.

Example 9 Preparation of Oil Collecting Structure 9

The oil collection structure was carried out in the same manner as in Example 8 except that 10 wt% of aluminum sulfate, 1 wt% of ethylene carbonate, and 89 wt% of purified water were sprayed onto the hydrophilic polymer layer in Step 2 of Example 8. Prepared.

Example 10 Preparation of Oil Collecting Structure 10

Except for stirring 10% by weight of aluminum sulfate, 3% by weight of ethylene carbonate and 87% by weight of purified water in step 2 of Example 8 was sprayed to the hydrophilic polymer layer was carried out in the same manner as in Example 8 to the oil collection structure Prepared.

Example 11 Preparation of Oil Collecting Structure 11

The oil collection structure was carried out in the same manner as in Example 8 except that 10 wt% of aluminum sulfate, 5 wt% of ethylene carbonate, and 85 wt% of purified water were sprayed onto the hydrophilic polymer layer in Step 2 of Example 8. Prepared.

Example 12 Preparation of Oil Collecting Structure 12

Step 1: 10% by weight of polyacrylic acid, 15% by weight of polyethylene glycol and 75% by weight of purified water were stirred at a speed of 2000 rpm for 1 hour using a stirrer, which was coated on a 200 mesh stainless steel wire mesh. The wire mesh was then dried in an oven at 80 ° C. for about 1 hour to form a hydrophilic polymer layer.

Step 2: 10% by weight of aluminum sulfate and 90% by weight of purified water were stirred for 1 hour at a speed of 500 rpm using a stirrer, which was sprayed onto the hydrophilic polymer layer formed in Step 1. Thereafter, the wire mesh was dried in an oven at 80 ° C. for about 1 hour, thereby preparing a structure for collecting oil according to the present invention.

Example 13 Preparation of Oil Collecting Structure 13

Except for stirring 10% by weight of aluminum sulfate, 1% by weight of ethylene carbonate and 89% by weight of purified water in step 2 of Example 12 was sprayed to the hydrophilic polymer layer was carried out in the same manner as in Example 12 to collect the oil collection structure Prepared.

Example 14 Preparation of Structure for Oil Collection 14

Except for stirring 10% by weight of aluminum sulfate, 3% by weight of ethylene carbonate and 87% by weight of purified water in step 2 of Example 12 was sprayed to the hydrophilic polymer layer was carried out in the same manner as in Example 12 to collect the oil collection structure Prepared.

Example 15 Preparation of Oil Collecting Structure 15

Except for stirring 10% by weight of aluminum sulfate, 5% by weight of ethylene carbonate and 85% by weight of purified water in step 2 of Example 12 was carried out in the same manner as in Example 12 except that the structure for oil collection Prepared.

≪ Comparative Example 1 &

20% by weight of polyvinyl alcohol and 80% by weight of purified water were stirred at a speed of 2000 rpm for 1 hour using a stirrer, and then coated on a 200 mesh stainless steel wire mesh. The wire mesh was then dried in an oven at 80 ° C. for about 1 hour to form a hydrophilic polymer layer.

≪ Comparative Example 2 &

15% by weight of polyvinyl alcohol and 85% by weight of purified water were stirred in Comparative Example 1, except that the coating was performed in the same manner as in Comparative Example 1.

≪ Comparative Example 3 &

10 wt% of polyvinyl alcohol and 90 wt% of purified water were stirred in Comparative Example 1, except that the coating was performed in the same manner as in Comparative Example 1.

≪ Comparative Example 4 &

After stirring 5 wt% of polyvinyl alcohol and 95 wt% of purified water in Comparative Example 1, it was performed in the same manner as in Comparative Example 1 except for coating.

≪ Comparative Example 5 &

20% by weight of polyvinyl alcohol, 5% by weight of polyethylene glycol and 75% by weight of purified water were stirred in Comparative Example 1, except that the coating was performed in the same manner as in Comparative Example 1.

≪ Comparative Example 6 >

20% by weight of polyvinyl alcohol, 10% by weight of polyethylene glycol and 70% by weight of purified water were stirred in Comparative Example 1, except that the coating was carried out in the same manner as in Comparative Example 1.

≪ Comparative Example 7 &

20% by weight of polyvinyl alcohol, 15% by weight of polyethylene glycol and 65% by weight of purified water were stirred in Comparative Example 1, except that the coating was carried out in the same manner as in Comparative Example 1.

≪ Comparative Example 8 >

20% by weight of polyacrylic acid, 15% by weight of polyethylene glycol and 65% by weight of purified water were stirred in Comparative Example 1, except that the coating was carried out in the same manner as in Comparative Example 1.

≪ Comparative Example 9 &

15% by weight of polyacrylic acid, 15% by weight of polyethylene glycol, and 70% by weight of purified water were stirred in Comparative Example 1, except that the coating was performed in the same manner as in Comparative Example 1.

≪ Comparative Example 10 &

10% by weight of polyacrylic acid, 15% by weight of polyethylene glycol and 75% by weight of purified water were stirred in Comparative Example 1, except that the coating was carried out in the same manner as in Comparative Example 1.

The compositions of the hydrophilic polymer solution and the water resistance enhancer (aluminum sulfate and ethylene carbonate) solution used in Examples 1 to 15 and Comparative Examples 1 to 10 are summarized in Table 1 below.

weight% Hydrophilic Polymer Solution Water Resistance Enhancer Solution Polyvinyl
Alcohol Poly
Acrylic acid Polyethylene
Glycol Purified water Sulfuric acid
aluminum Ethylene
Carbonate Purified water Example 1 20 - 15 65 10 5 85 Example 2 20 - 15 65 10 3 87 Example 3 20 - 15 65 10 One 89 Example 4 - 20 15 65 10 0 90 Example 5 - 20 15 65 10 One 89 Example 6 - 20 15 65 10 3 87 Example 7 - 20 15 65 10 5 85 Example 8 - 15 15 70 10 0 90 Example 9 - 15 15 70 10 One 89 Example 10 - 15 15 70 10 3 87 Example 11 - 15 15 70 10 5 85 Example 12 - 10 15 75 10 - 90 Example 13 - 10 15 75 10 One 89 Example 14 - 10 15 75 10 3 87 Example 15 - 10 15 75 10 5 89 Comparative Example 1 20 - - 80 - - - Comparative Example 2 15 - - 85 - - - Comparative Example 3 10 - - 90 - - - Comparative Example 4 5 - - 95 - - - Comparative Example 5 20 - 5 75 - - - Comparative Example 6 20 - 10 70 - - - Comparative Example 7 20 - 15 65 - - - Comparative Example 8 - 20 15 65 - - - Comparative Example 9 - 15 15 70 - - - Comparative Example 10 - 10 15 75 - - -

analysis

(One) Whether or not  Measurement of durability of hydrophilic polymers

In order to measure the durability, that is, the change in water resistance, of the hydrophilic polymer according to the crosslinking of the hydrophilic polymer, a hydrophilic polymer layer was formed on the metal support and crosslinked by irradiating an electron beam of 50 kGy. After washing for 24 hours, and dried to measure the weight change before and after washing to analyze the residual amount of the hydrophilic polymer, the results are shown in FIG.

(Sample 1: 20% by weight of polyvinyl alcohol, 80% by weight of purified water; Sample 2: 20% by weight of polyvinyl alcohol, 5% by weight of polyethylene glycol and 75% by weight of purified water; Sample 3: 20% by weight of polyvinyl alcohol, 10 wt% polyethylene glycol and 70 wt% purified water; sample 4: 20 wt% polyvinyl alcohol, 15 wt% polyethylene glycol and 65 wt% purified water)

As shown in Figure 2, it can be seen that the residual amount after washing is about 10% for samples 1 to 4 that are not irradiated with radiation. That is, it can be seen that most of the hydrophilic polymer layer is washed off and washed off during the washing process. On the other hand, in the case of crosslinked samples 1 to 4, the residual amount after washing was about 90%. When crosslinking the hydrophilic polymer through this, it was confirmed that the hydrophilic polymer was not easily washed off and peeled off due to the improved water resistance. .

(2) Measurement of durability change of hydrophilic polymer by addition of water resistance enhancer

The hydrophilic polymer layer to which the water resistant enhancer of Examples 4 to 15 was added and the hydrophilic polymer layer to which the water resistant enhancer of Comparative Examples 8 to 10 were not added were washed in a water bath containing purified water for 24 hours at a rate of 1000 rpm. The dry weight was measured before and after washing to analyze the residual amount of the hydrophilic polymer, and the results are shown in FIG. 3.

As shown in FIG. 3, it can be seen that the hydrophilic polymer layers of Examples 4 to 15 exhibit a significantly higher residual ratio than the hydrophilic polymer layers of Comparative Examples 8 to 10. In addition, it can be seen that as the amount of the added water-resistant reinforcing agent (ethylene carbonate) increases, the remaining amount becomes higher, and through this, the durability of the hydrophilic polymer, that is, the water resistance, is improved.

(3) hydrophilic polymer layer Contact angle  analysis

The contact angles of the hydrophilic polymer layers formed in Examples 1, 2, 3, 5, 6, and 7 and the hydrophilic polymer layers formed in Comparative Examples 1 to 7 were analyzed, and the results are shown in FIGS. 4 and 5.

As shown in Figure 4, it can be seen that the hydrophilic polymer layer formed in Examples 1 to 6 all exhibit a contact angle of up to 40 ° exhibiting hydrophilicity. At this time, it can be seen that the contact angle is lowered as the amount of ethylene carbonate, which is a water-resistant reinforcing agent, is increased.

In addition, as shown in Figure 5, it can be seen that as the content of the hydrophilic polymer in Comparative Examples 1 to 7 increases, the contact angle of the formed hydrophilic polymer layer is lowered.

Therefore, it was confirmed through the above results that the amount of water resistant enhancer can be appropriately adjusted to prevent the problem of lowering hydrophilicity due to the addition of excess reinforcing agent.

Experimental Example 1 Oil Separation Characteristics Evaluation

(1) Evaluation of Oil Separation Characteristics by Hydrophilic Polymer Membrane 1

In order to evaluate the oil separation characteristics by the hydrophilic polymer membrane, a mixed solution of 100 ml of distilled water and 100 ml of soybean oil using the structure for oil collection prepared in Examples 1 to 3 and the structure prepared in Comparative Examples 1 to 3 was prepared. Separated. At this time, as shown in the photograph of FIG. 6, the separation was performed by combining the structure for oil collection with the beaker and the transparent container, and the separation results are shown in FIGS. 7 to 13.

As shown in Figure 7, it can be seen that the 200 mesh (mesh) stainless steel wire (control) that is not coated with a hydrophilic polymer layer does not separate oil at all.

In addition, as shown in Figures 8 to 10, the structures prepared in Comparative Examples 1 to 3 can separate some oil, but it can be seen that the complete separation is not achieved, which is due to the lack of the content of the hydrophilic polymer It is predicted that they did not express enough hydrophilicity to separate the oil.

On the other hand, as shown in Figures 11 to 13, the structures prepared in Examples 1 to 3 can be seen that the oil is mostly separated, it can be seen that the oil is separated better as the amount of ethylene carbonate added as a water-resistant enhancer increases. .

Through the above results, it was confirmed that the oil can be effectively separated using the structure for oil collection according to the present invention, it was confirmed that the oil can be separated more effectively according to the addition of the ethylene carbonate.

(2) Evaluation of Oil Separation Characteristics by Hydrophilic Polymer Membrane 2

The mixed solution of 100 ml of distilled water and 100 ml of soybean oil was separated using the structure for oil collection prepared in Examples 4 to 7 and the structure prepared in Comparative Examples 8 to 10, and the separation results are shown in FIGS. 14 to 20.

As shown in Figures 14 to 16, the structures of Comparative Examples 8 to 10 can remove some oil, but it can be seen that not all of the oil in the mixed solution can be separated.

On the other hand, as shown in Figures 17 to 20, the oil collection structure prepared in Examples 4 to 7 according to the present invention can be seen that all the oil in the mixed solution is separated.

Through the above results, it was confirmed that according to the addition of the water-resistant reinforcing agent in addition to the water resistance of the hydrophilic polymer membrane, the separation performance of the oil is improved, through which it can be predicted that the oil collection structure according to the present invention can be effectively used for oil collection.

10: oil collection structure
11: reticulated support
12: hydrophilic polymer layer

Claims (16)

The hydrophilic polymer layer is coated on the surface of the mesh support, the surface of the hydrophilic polymer layer is characterized in that the water-resistant enhancer comprising aluminum sulfate or ethylene carbonate is further coated.
The oil collection structure according to claim 1, wherein the mesh support is a metal mesh or a nonwoven fabric.
3. The oil collection structure according to claim 2, wherein the metal is selected from the group consisting of stainless steel, aluminum and titanium.
The structure of claim 1, wherein the mesh support has a mesh shape of 10 to 500 mesh.
The method of claim 1, wherein the hydrophilic polymer is polyethylene glycol (PEG), polyvinyl alcohol (PVA), polyvinylacetate (PVAc), polyvinylpyrrolidone (PVP), polyethylene oxide (PEO) and carboxymethyl cellulose (CMC) Oil collection structure, characterized in that at least one polymer selected from the group consisting of.
The structure of claim 1, wherein the hydrophilic polymer layer is crosslinked.
The structure of claim 1, wherein the water resistant reinforcing agent comprises aluminum sulfate and ethylene carbonate.
The structure of claim 1, wherein the water resistant reinforcing agent is formed on at least a portion of the surface of the hydrophilic polymer layer.
Coating a hydrophilic polymer layer on the surface of the mesh support (step 1); And
Spraying a water-resistant reinforcement solution containing aluminum sulfate or ethylene carbonate on the surface of the hydrophilic polymer layer coated in the step 1 (step 2); manufacturing method of the oil collection structure comprising a.
The method of claim 9, wherein the coating of step 1 is polyethylene glycol (PEG), polyvinyl alcohol (PVA), polyvinylacetate (PVAc), polyvinylpyrrolidone (PVP), polyethylene oxide (PEO) and carboxymethylcellulose (CMC) A method for producing an oil collection structure, characterized in that carried out using a polymer solution prepared by dissolving at least one polymer selected from the group consisting of a solvent.
The method of claim 10, wherein the polymer solution comprises a hydrophilic polymer in a composition of 10 to 50% by weight.
10. The method of claim 9, wherein the water-resistant reinforcement solution of step 2 comprises a water-resistant reinforcement agent comprising aluminum sulfate or ethylene carbonate in a composition of 10 to 20% by weight.
10. The method of claim 9, wherein the method further comprises the step of crosslinking the hydrophilic polymer before adding the water resistant enhancer of step 2.
The method of claim 13, wherein the crosslinking is performed by irradiation.
15. The method of claim 14, wherein the irradiation is carried out at an irradiation dose of 10 to 100 kGy.
A method for collecting oil present on the water surface using the oil collecting structure of claim 1.

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