KR20190114307A - Chitin and lubricantchemical reaction superwater-repellent and slipper surfaceinduction technology - Google Patents

Abstract

One embodiment of the present invention relates to a method for forming a super-water-repellent surface which comprises the steps of: stirring chitin and a lubricant to manufacture a dispersion solution; refluxing the dispersion solution to form a product in which the chitin and the lubricant are combined through a chemical reaction; and coating the product on a surface of a substrate. As a result, a super-water-repellent surface is formed and the lubricant is not eluted to the contents inside a container.

Description

Chitin and lubricantchemical reaction superwater-repellent and slipper surfaceinduction technology

The present invention relates to a super water-repellent and slippery surface forming technology using a chemical reaction of chitin and lubricant, and more particularly, to form a super water-repellent surface by chemically reacting chitin and lubricant so that the lubricant does not mix with the contents. Application to a coating layer relates to providing a slippery surface.

Robust synthetic surface creation technology that pushes a wide range of liquids can be used in a wide range of applications, including biomedical devices, fuel transportation, construction and food processing equipment.

It is mainly used for packaging containers with high viscosity contents, cosmetic containers, food containers, household goods containers, and is making a lot of investment in packaging technology and packaging materials that can maintain freshness for a long time and are making changes.

Water repellent and super water-repellent surfaces consist of surface materials with low surface roughness and low surface energy. However, recent slippery surface technology is a technique in which a surface is filled with a porous support and pores with lubricant, and water and oil are better than the contact angle of water or oil. It's a technology focused on flowing tumble angles.

The slippery surface technology has a problem that the lubricant elutes into the contents because there is no chemical defect between the porous support and the lubricant.

Therefore, research on slippery surface technology is required to prevent the lubricant of the coating layer inside the packaging container from eluting the contents.

Republic of Korea Patent Publication KR 10-2014-0148435

The technical problem to be achieved by the present invention is to provide a slippery surface technology to prevent the lubricant of the coating layer inside the packaging container eluted in the contents.

More specifically, the chitin and the lubricant form a super water-repellent surface through a chemical reaction so that the lubricant does not elute into the contents.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. There will be.

In order to achieve the above technical problem, an embodiment of the present invention provides a method for forming a super water-repellent surface. The method of forming a super water-repellent surface of the present invention comprises the steps of preparing a dispersion by stirring a chitin and a lubricant, refluxing the dispersion to form a product of the chitin and the lubricant combined through a chemical reaction and the product on the surface of the substrate It may be characterized by comprising the step of coating.

In addition, the lubricant may be characterized in that it comprises a hydrophobic hydrocarbon or a silicone polymer.

In addition, the hydrophobic hydrocarbon may be characterized as including dodecanoyl chloride or docanoic anhydride.

In addition, the silicone polymer may be characterized in that it comprises a monoglycidyl ether terminated polydimethylsiloxane (monoglycidyl ether terminated polydimethylsiloxane).

In addition, the temperature of the step of refluxing the dispersion may be characterized in that 100 ℃ or more.

In addition, the step of coating the product on the surface of the substrate may be characterized in that it comprises the coating using a spray gun.

In addition, the water contact angle of the formed super water-repellent surface may be characterized in that more than 125 °.

In order to achieve the above technical problem, another embodiment of the present invention can provide a container including a surface formed by the above-described method for forming a super water-repellent surface therein.

According to an embodiment of the present invention, the chitin and the lubricant to form a super water-repellent surface through a chemical reaction and applied to the inner coating layer of the packaging container to provide a slippery surface to provide an effect that the lubricant is not eluted in the contents.

The effects of the present invention are not limited to the above-described effects, but should be understood to include all the effects deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a flow chart showing a method of forming a super water-repellent surface of the present invention.
2 is a graph showing a weight change of Preparation Example 1 with temperature.
3 is a comparative graph of chitin and a material prepared according to Preparation Example 1 of the present invention.
Figure 4 is a photograph of measuring the water contact angle after coating with a material prepared in Preparation Example 1 of the present invention.
5 shows the weight change of Preparation Example 2 with temperature.
Figure 6 is a photograph of measuring the water contact angle after coating with a material prepared in Preparation Example 2 of the present invention.
Figure 7 shows the weight change of Preparation Example 3 with temperature.
8 is a comparative graph of a chitin and a material prepared according to Preparation Example 3 of the present invention.
9 is a photograph measuring the water contact angle after coating with a material prepared in Preparation Example 3 of the present invention.
10 is a photograph confirming slippery characteristics using ketchup on the surface coated with the material prepared according to the embodiment of the present invention and the surface coated with Dodecanoic acid.
11 is a photograph confirming the slippery characteristics using the ketchup after coating with a material prepared according to an embodiment of the present invention.
12 is a photograph confirming the slippery characteristics using a syrup after coating with a material prepared according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, coupled) with another part, it is not only" directly connected "but also" indirectly connected "with another member in between. "Includes the case. In addition, when a part is said to "include" a certain component, this means that it may further include other components, without excluding the other components unless otherwise stated.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flow chart showing a method of forming a super water-repellent surface of the present invention.

Referring to FIG. 1, in the method of forming a super water-repellent surface, a step of preparing a dispersion by stirring chitin and a lubricant (S100) and refluxing the dispersion to form a product in which the chitin and the lubricant are combined through a chemical reaction ( S200) and the step of coating the product on the surface of the substrate (S300) may be characterized.

First, the super water-repellent surface forming method to prepare a dispersion by stirring the chitin and lubricant (S100).

[Formula 1] shows the structural formula of the chitin

[Formula 1]

The chitin is a natural polymer polysaccharide present in skeletal components of molluscs such as shellfish, shellfish, cicada, locust, squid, etc. of shellfish such as lobster, crab, shrimp, and cell walls of fungi such as fungi, yeast, and mushrooms.

The chitin is a natural polymer polysaccharide of tasteless and odorless harmless to the human body is mainly extracted from the red crab has the advantage that there is no possibility of depletion.

In addition, the chitin provides the advantages of high value-added material having a variety of features such as excellent biocompatibility, formability and functionality.

The chitin may serve as a porous support.

The chitin may serve as a carrier for supporting the lubricant.

The lubricant may be characterized in that it comprises a hydrophobic hydrocarbon or a silicone polymer.

For example, the hydrophobic hydrocarbon may include dodecanoyl chloride or docanoic anhydride.

For example, the silicone polymer may include a monoglycidyl ether terminated polydimethylsiloxane.

The lubricant may provide a hydrophobic chitin because it binds the hydrophobic lubricant to the chitin through a chemical bond with the chitin.

For example, the hydrophobic chitin can be synthesized by chemically bonding a hydroxyl group (-OH) in the chitin molecular structure with a hydrophobic hydrocarbon or a hydrophobic silicone polymer.

The dispersion may be a material in which the chitin and the lubricant are synthesized through chemical bonding.

Next, the dispersion is refluxed to form a product (S200).

The refluxing step refers to the step of condensing the vapor generated by the heating and returning it back to the liquid phase.

The temperature of the step of refluxing the dispersion may be characterized in that 100 ℃ or more.

For example, when the temperature of the refluxing step is less than 100 ℃ steam may not be generated by heating it may be preferable to reflux at a temperature of 100 ℃ or more.

Next, the product is coated on the surface of the substrate (S300).

The method of coating the product on the surface of the substrate may be coated in various ways.

For example, the step of coating the product on the surface of the substrate may be characterized in that it comprises coating using a spray gun.

For example, a solution may be prepared by dispersing the product in a 5% solution of tetrahydrofuran (THF) and applying the solution several times on a slide glass cleaned using a spray gun, followed by a 120 ° C. oven. Drying at 30 minutes may coat the superhydrophobic surface on the slide glass surface substrate.

Thus, coating with a spray gun may be desirable as it may provide a uniform coating on the substrate surface.

In addition, the water contact angle of the formed super water-repellent surface may be characterized in that more than 125 °.

If the water contact angle is 90 ° or less, the water is a hydrophilic surface like the surface, if the water contact angle is 90 ° or more water may be a hydrophobic surface because the agglomerates.

The super water repellent surface may refer to a surface having a water contact angle of 125 ° or more and having excellent water repellency.

Therefore, the surface of the present invention may be formed with a water contact angle of more than 125 ° to represent the super water-repellent surface.

In addition, it is possible to provide a container including a surface formed by the above-described super water-repellent surface forming method therein.

Accordingly, the container including the super water-repellent surface formed through the embodiment of the present invention is a problem that the lubricant is eluted to the contents contained in the container when the coating material inside the container conventionally carrying a porous support lubricant and the present invention. Coating with a product produced through the chemical reaction of the lubricant can provide the effect of solving the above problems.

Preparation Example 1

1) In a 100 ml round flask, 0.6 g of chitin, 12 ml of pyridine and 25 ml of dimethylformamide (DMF) were added and stirred under a nitrogen atmosphere to prepare a dispersion.

2) 2.6 g of Dodecanoyl chloride was slowly added dropwise to the dispersion using a syringe.

3) After refluxing (refluxing) at 115 ° C. for 6 hours, the reaction was terminated to obtain a reaction product.

4) The reaction product was filtered using a filter paper, washed with water and dried in a vacuum oven at 60 ℃ for 24 hours.

[Scheme 1] shows the Preparation Example 1.

[Scheme 1]

[Scheme 1] (a) may represent a chitin.

[Scheme 1] (b) may represent Dodecaneyl chloride (Dodecanoyl chloride).

[Scheme 1] (c) may represent the Preparation Example 1 product.

Preparation Example 2

1) Chitin 0.2g, toluene 25ml, Dodecanoic anhydride (0.6g) was added to a 100ml round flask and stirred under a nitrogen atmosphere to prepare a dispersion.

2) The dispersion was refluxed (refluxed) at 120 ° C. for 5 hours and the reaction was terminated to obtain a reaction product.

3) The reaction product was filtered using a filter paper, washed with water and dried in a vacuum oven at 60 ℃ for 24 hours.

[Scheme 2] shows the Preparation Example 2.

[Scheme 2]

[Scheme 2] (a) may represent a chitin.

[Scheme 2] (b) may represent docanoic anhydride (Decanoic anhydride).

[Scheme 2] (c) may represent a Preparation Example 2 product.

Preparation Example 3

1) Into a 100 ml round flask, 0.5 g of chitin, 25 ml of toluene, 3 g of monoglycidyl ether terminated polydimethylsiloxane, and 3 drop of acetic acid were added, followed by stirring under a nitrogen atmosphere to prepare a dispersion.

2) The dispersion was refluxed (refluxed) at 100 ° C. for 24 hours and then the reaction was terminated to obtain a reaction product.

3) The reaction product was filtered using a filter paper, washed with water and dried in a vacuum oven at 60 ℃ for 24 hours.

[Scheme 3] shows the Preparation Example 3.

Scheme 3

[Scheme 3] (a) may represent a chitin.

[Scheme 3] (b) may represent a monoglycidyl ether terminated polydimethylsiloxane (monoglycidyl ether terminated polydimethylsiloxane).

[Scheme 3] (c) may represent a Preparation Example 3 product.

2 is a graph showing a weight change of Preparation Example 1 with temperature.

Referring to Figure 2, it is a graph showing the weight change of the additive of Preparation Example 1 with temperature, through which chitin and dodecanoic acid is synthesized to prepare the product chitin + Dodecanoyl chloride of Preparation Example 1 (Dodecanoyl chloride) You can see that.

3 is a comparative graph of chitin and a material prepared according to Preparation Example 1 of the present invention.

Referring to Figure 3, it is a graph comparing the material through the IR (infrared spectroscopy) graph of the product (product) and chitin prepared according to Preparation Example 1 of the present invention.

Figure 4 is a photograph of measuring the water contact angle after coating with a material prepared in Preparation Example 1 of the present invention.

Referring to FIG. 4, 0.5g of the product prepared in Preparation Example 1 of the present invention was dispersed in a 5% solution of tetrahydrofuran (THF: Tetrahydrofuran) to prepare a solution, and the prepared solution was washed with a spray gun. It is a photograph confirming that the water contact angle was measured on the surface of the substrate prepared by coating the glass substrate several times and then drying and coating in an oven at 120 ° C. for 30 minutes.

Therefore, it can be confirmed that the coating layer having a super water-repellent function was prepared through the surface forming method of the present invention.

5 shows the weight change of Preparation Example 2 with temperature.

Referring to Figure 5, it is a graph showing the weight change of the additive of Preparation Example 2 with temperature, through which the chitin and dodecanoic anhydride (Decanoic anhydride) is synthesized to prepare the product chitin + anhydride of Preparation Example 2 You can see that.

Figure 6 is a photograph of measuring the water contact angle after coating with a material prepared in Preparation Example 2 of the present invention.

Referring to FIG. 6, 0.5g of the product prepared in Preparation Example 2 of the present invention was dispersed in a 5% solution of tetrahydrofuran (THF: Tetrahydrofuran) to prepare a solution, and the prepared solution was washed with a spray gun. It is a photograph confirming that the water contact angle was measured on the surface of the substrate produced by coating the glass substrate several times and then drying and coating in a 120 ° C. oven for 30 minutes.

Therefore, it can be confirmed that the coating layer having a super water-repellent function was prepared through the surface forming method of the present invention.

Figure 7 shows the weight change of Preparation Example 3 with temperature.

Referring to Figure 7, it is a graph showing the weight change of the additive of Preparation Example 3 with temperature, through which chitin (chitin) and PDMS1 (monoglycidyl ether terminated polydimethylsiloxane) is synthesized to produce the product chitin + PDMS1 of Preparation Example 3 You can check.

8 is a comparative graph of a chitin and a material prepared according to Preparation Example 3 of the present invention.

Referring to Figure 8, it is a graph comparing the material through the IR (infrared spectroscopy) graph of the product (product) prepared according to Preparation Example 3 of the present invention.

9 is a photograph measuring the water contact angle after coating with a material prepared in Preparation Example 3 of the present invention.

Referring to FIG. 9, 0.5g of the product prepared in Preparation Example 2 of the present invention was dispersed in a tetrahydrofuran (THF: Tetrahydrofuran) 5% solution to prepare a solution, and the thus prepared solution was washed with a spray gun. It is a photograph confirming that the water contact angle was measured on the surface of the substrate prepared by coating the glass substrate several times and then drying and coating in a 120 ° C. oven for 30 minutes.

Therefore, it can be confirmed that the coating layer having a super water-repellent function was prepared through the surface forming method of the present invention.

10 is a photograph showing the slippery characteristics using ketchup on the surface coated with the material prepared according to the embodiment of the present invention and the surface coated with Dodecanoic acid.

Referring to FIG. 10, as a result of measuring slippery characteristics using tomato ketchup to confirm the properties of a substrate coated with a product prepared according to an embodiment of the present invention, the surface coated with Dodecanoic acid does not show slippery characteristics. However, Dodecanoic-chitin-coated surfaces showed slippery characteristics without flowing ketchup.

11 is a photograph confirming the slippery characteristics using ketchup after coating with a material prepared according to an embodiment of the present invention.

12 is a photograph confirming the slippery characteristics using a syrup after coating with a material prepared according to an embodiment of the present invention.

11 to 12, in order to check the characteristics of the substrate coated with the product prepared according to the embodiment of the present invention, after coating PDMS1-chitin into the glass bottle, ketchup and syrup, respectively, put slippery characteristics The ketchup and the syrup were both flown out of the bottle and discharged to the outside of the bottle.

According to an embodiment of the present invention, the chitin and the lubricant to form a super water-repellent surface through a chemical reaction and applied to the inner coating layer of the packaging container to provide a slippery surface to provide an effect that the lubricant is not eluted in the contents.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is represented by the following claims, and it should be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present invention.

Claims (8)

Stirring the chitin and lubricant to prepare a dispersion;
Refluxing the dispersion to form a product in which the chitin and the lubricant are combined through a chemical reaction; And
Coating the product on a substrate surface; Super water-repellent surface forming method comprising a. The method of claim 1,
The lubricant comprises a hydrophobic hydrocarbon or a silicone polymer. The method of claim 2,
The hydrophobic hydrocarbon is dodecanyl chloride (Dodecanoyl chloride) or dodecanoic anhydride (Decanoic anhydride) characterized in that it comprises a super water-repellent surface. The method of claim 2,
The silicon polymer is a super water-repellent surface forming method comprising a monoglycidyl ether terminated polydimethylsiloxane (monoglycidyl ether terminated polydimethylsiloxane). The method of claim 1,
Superhydrophobic surface forming method, characterized in that the temperature of the step of refluxing the dispersion is 100 ℃ or more. The method of claim 1,
Coating the product on the substrate surface comprises coating with a spray gun. The method of claim 1,
The water-repellent surface forming method of the super water-repellent surface is characterized in that more than 125 °. Container containing the surface formed by the super water-repellent surface formation method of claim 1.

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