KR20220051898A - Antibacterial film comprising metal nano powder and method for preparing thereof - Google Patents

Abstract

The present invention relates to an antibacterial film comprising metal nanopowders and a method for preparing the same, and more particularly, to an antibacterial film comprising metal nanopowders and a method for preparing the same, wherein the antibacterial film comprising metal nanopowders does not use an organic solvent and thus is eco-friendly, exhibits high hydrophobicity, moisture permeability, and durability, and has excellent antibacterial activity against Staphylococcus aureus ATCC 6538P, Escherichia coli ATCC 8739, and Klebsiella pneumoniae ATCC 4352.

Description

Antibacterial film comprising metal nanopowder and manufacturing method thereof

The present invention relates to an antibacterial film containing metal nanopowder and a manufacturing method thereof, and more particularly, it does not use an organic solvent, so it is eco-friendly, exhibits high hydrophobicity, moisture permeability and durability, and Staphylococcus aureus ATCC 6538P) , Escherichia coli ATCC 8739 and Klebsiella pneumoniae (ATCC 4352) relates to an antibacterial film comprising a metal nanopowder having excellent antibacterial activity, and a manufacturing method thereof.

Microorganisms are living things that are always around us, and there are beneficial microorganisms that help humans, but there are also many harmful microorganisms that cause various problems, such as causing diseases, producing odors, and giving aesthetic disgust. do.

In particular, in the case of mold, it inhabits in a damp basement or enclosed space (eg, closet, shoe cabinet, etc.), creates odor, deforms objects, and is not only disgusting in appearance but also causes disease. In addition, in the case of the monsoon season with high temperature and humidity, it inhabits the wallpaper and the like indoors, causing the problems described above.

Recently, interest in hygiene management products to improve the unsanitary environment caused by such microorganisms is increasing. In particular, hygiene management that helps prevent bacterial and viral infections due to the outbreak of epidemics such as Severe Acute Respiratory Syndrome (SARS), avian influenza, swine flu, and 2020 coronavirus (COVID-19) since the 2000s Interest in products is continuously increasing.

Accordingly, many antibacterial-related products intended to improve the unsanitary environment caused by microorganisms are also manufactured and sold. However, in general, chemicals are used as antibacterial agents, and in many cases, these chemicals are low-molecular-weight materials, which poses a problem in terms of safety and durability.

In addition, low molecular weight compounds have a disadvantage in that antibacterial durability is poor because they are volatilized. In addition, although synthetic compounds or inorganic substances have antibacterial properties, there is an inconvenience in that an aerosol spray must be prepared by dissolving or dispersing it in an organic solvent, and there is also a disadvantage that the indoor odor is not good.

Therefore, in order to supplement the above-mentioned problems, the present inventors recognized that it is urgent to develop an antibacterial film having an excellent antibacterial effect on microorganisms and a method for manufacturing the same, and completed the present invention.

Republic of Korea Patent Publication No. 10-2013-0110908 Republic of Korea Patent Publication No. 10-1198634

An object of the present invention is to be environmentally friendly because it does not use an organic solvent, and by using a metal dispersant, the dispersibility of metal nanopowder can be improved to increase transparency, and pores are formed in the film to provide excellent gas permeability and antibacterial film and method for manufacturing the same is to provide

Another object of the present invention is to improve chemical, thermal and mechanical properties such as hydrophobicity, moisture permeability, and tensile strength, Staphylococcus aureus ATCC 6538P, Escherichia coli ATCC 8739) and Klebsiella pneumoniae, ATCC 4352) to provide an antibacterial film having an excellent antibacterial activity and a manufacturing method thereof.

Another object of the present invention is to provide an antibacterial glove and antibacterial food packaging material comprising an antibacterial film comprising metal nanopowders and polymer raw materials.

The technical problems to be achieved by the invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art from the description of the present invention.

In order to achieve the above object, the present invention provides an antibacterial film comprising a metal nanopowder and a method for manufacturing the same.

Hereinafter, the present specification will be described in more detail.

The present invention provides an antibacterial film comprising a metal nanopowder and a polymer raw material.

In the present invention, the antibacterial film has an antibacterial activity value of 3.0 to 7.0 in Staphylococcus aureus ATCC 6538P, Escherichia coli ATCC 8739, and Klebsiella pneumoniae, ATCC 4352).

In the present invention, the metal nanopowder is made of silver (Ag), copper (Cu), zinc (Zn), titanium (Ti), gold (Au), platinum (Pt), palladium (Pd), and oxides thereof. It is characterized in that at least one selected from the group.

In the present invention, the polymer raw material is polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP), polyethylene terephthalate (Polyethylene terephthalate, PET), polyurethane (Polyurethane, PU), polystyrene (PS), poly Polyvinyl chloride (PVC), polyvinylbutyral (PVB), ethylene vinyl acetate (EVA), ABS resin (acrylonitrile butadiene styrene copolymer), polycarbonate (PC) and nylon (Nylon) ), characterized in that at least one selected from the group consisting of.

In the present invention, the antibacterial film is characterized in that it has a moisture permeability of 13 to 15 g / m ² ·day.

In addition, the present invention provides a method for producing an antibacterial film, characterized in that it comprises the following steps.

(S1) preparing a metal nanopowder;

(S2) mixing the metal nanopowder, the first polymer raw material and the dispersant;

(S3) mixing the mixture and a second polymer raw material; and

(S4) extruding the mixture to prepare an antibacterial film.

In the present invention, the step (S1) is characterized in that it consists of the following steps.

(S1A) mixing a metal raw material and an aqueous nitric acid solution;

(S1B) adding hydrochloric acid to the mixture and heating; and

(S1C) extracting the metal nanopowder by adding a reducing agent to the mixture.

In the present invention, the reducing agent is hydrazine (N ₂ H ₄ ), sodium borohydride (NaBH ₄ ), potassium hypophosphite (KH ₂ PO ₄ ) and sodium hypophosphite (NaH ₂ PO ₄ ) One selected from the group consisting of It is characterized by more than one.

In the present invention, the step (S2) comprises 1 to 10 wt% of metal nanopowder; 1 to 10 wt% of a metallic material; 75 to 95% by weight of the first polymer raw material; And mixing 0.1 to 5% by weight of the dispersant; characterized in that.

In the present invention, the dispersing agent is characterized in that at least one selected from the group consisting of magnesium (Mg), calcium (Ca), magnesium oxide (MgO), calcium oxide (CaO), and mixtures thereof.

In the present invention, the method for manufacturing the antibacterial film (S5) corona surface treatment of the antibacterial film with an applied power of 3 to 10 kW; characterized in that it additionally comprises.

All matters mentioned in the antibacterial film containing the metal nanopowder and its manufacturing method are equally applied unless there is a contradiction.

The antibacterial film of the present invention and its manufacturing method are environmentally friendly because they do not use an organic solvent, and by using a metal dispersant, the dispersibility of the metal nanopowder can be improved to increase transparency, and pores are formed in the film to increase the gas vapor permeability It can be easily applied to fermented food or fresh food packaging materials such as kimchi, or antibacterial and long-term jobs because air moves smoothly.

The antibacterial film of the present invention and its manufacturing method improve chemical, thermal and mechanical properties such as thermal barrier properties, hydrophobicity, moisture permeability, and tensile strength, Staphylococcus aureus ATCC 6538P, Escherichia coli ATCC 8739) and pneumonia It has excellent antibacterial activity against Klebsiella pneumoniae (ATCC 4352).

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is inoculated with Staphylococcus aureus and Escherichia coli for the antibacterial films 1 and 2 of the present invention prepared in Examples 1 and 2 and confirmed 24 hours later (a) Staphylococcus aureus ( Staphylococcus aureus, ATCC 6538P) and (b) This is an image of a sample of Escherichia coli (ATCC 8739).
2 is a test report confirmed 24 hours after inoculation of Staphylococcus aureus and E. coli for the antibacterial films 1 and 2 of the present invention prepared in Examples 1 and 2.
3 is a view showing (a) Staphylococcus aureus (ATCC 6538P) and (b) Escherichia coli, ATCC 8739 confirmed 24 hours after inoculation of Staphylococcus aureus and Escherichia coli to the copper nanopowder prepared in Preparation Example 1. ) is a sample image.
4 is a test report confirmed 24 hours after inoculating Staphylococcus aureus and Escherichia coli with respect to the copper nanopowder prepared in Preparation Example 1. FIG.

The terms used in this specification have been selected as currently widely used general terms as possible while considering the functions in the present invention, but these may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, and the like. In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than the name of a simple term.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Numerical ranges are inclusive of the values defined in that range. Every maximum numerical limitation given throughout this specification includes all lower numerical limitations as if the lower numerical limitation were expressly written. Every minimum numerical limitation given throughout this specification includes all higher numerical limitations as if the higher numerical limitation were expressly written. Any numerical limitation given throughout this specification shall include all numerical ranges within the broader numerical range, as if the narrower numerical limitation were expressly written down.

Hereinafter, examples of the present invention will be described in detail, but it is obvious that the present invention is not limited by the following examples.

antibacterial film

The present invention provides an antibacterial film comprising a metal nanopowder and a polymer raw material.

The antibacterial film may have an antibacterial activity value of 3.0 to 7.0 in Staphylococcus aureus ATCC 6538P, Escherichia coli ATCC 8739, and Klebsiella pneumoniae (ATCC 4352).

The antibacterial activity value is a value evaluated by comparing the number of strains cultured for a certain time, and when the antibacterial activity value is 2.0 or more, it means that 99% or more of the strains are killed and have an antibacterial effect.

The metal nanopowder is one selected from the group consisting of silver (Ag), copper (Cu), zinc (Zn), titanium (Ti), gold (Au), platinum (Pt), palladium (Pd), and oxides thereof. or more, and more preferably, may be at least one selected from the group consisting of silver, copper, zinc, and oxides thereof.

The polymer raw material is polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP), polyethylene terephthalate (PET), polyurethane (Polyurethane, PU), polystyrene (Polystyrene, PS), polyvinyl chloride (Polyvinyl chloride) , PVC), polyvinylbutyral (PVB), ethylene vinyl acetate (Ethylene Vinyl Acetate, EVA), ABS resin (acrylonitrile butadiene styrene copolymer), polycarbonate (Polycarbonate, PC) and from the group consisting of nylon (Nylon) It may be at least one selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, and ABS resin.

The antibacterial film may have a moisture permeability of 13 to 15 g/m ² ·day. Due to the high gas permeability of the antibacterial film according to the present invention, it can be applied to packaging materials for fermented food or fresh food, which should be easy to move gas, latex gloves used in laboratories, medical sheets or dressing fabrics for wound protection, and the like.

Manufacturing method of antibacterial film

The present invention provides a method for producing an antibacterial film comprising the following steps.

(S1) preparing a metal nanopowder;

(S2) mixing the metal nanopowder, the first polymer raw material and the dispersant;

(S3) mixing the mixture and a second polymer raw material; and

(S4) extruding the mixture to prepare an antibacterial film.

The said antibacterial film applies equally unless it contradicts all the points mentioned above.

The step (S1) is a step of preparing a metal nanopowder, and more specifically, may be composed of the following steps.

(S1A) mixing a metal raw material and an aqueous nitric acid solution;

(S1B) adding hydrochloric acid to the mixture and heating; and

(S1C) extracting the metal nanopowder by adding a reducing agent to the mixture.

The metal raw material of step (S1A) is silver (Ag), copper (Cu), zinc (Zn), titanium (Ti), gold (Au), platinum (Pt), palladium (Pd) and the group consisting of oxides thereof It may be at least one selected from

The aqueous nitric acid solution may be 20 to 40% nitric acid aqueous solution, more preferably 25 to 35% nitric acid aqueous solution.

The metal raw material and the aqueous nitric acid solution may be mixed in a ratio of 1: 2 to 5, preferably in a ratio of 1: 2 to 4.

The step (S1A) may further include mixing the metal raw material and the nitric acid solution and stirring while heating.

In the step (S1B), the particle size of the metal nano-powder produced may be adjusted according to the heating temperature, and the particle size of the metal nano-powder produced by heating and stirring to 60 to 500° C. may be adjusted. More specifically, metal nanopowder having a diameter of 700 to 1,000 nm can be prepared when heated and stirred at 60 to 80° C., and metal nanopowder having a diameter of 300 to 600 nm when heated and stirred at 80 to 100° C. can be prepared, and when heated and stirred at 150 to 200 ° C, a metal nanopowder having a diameter of 70 to 100 nm can be prepared, and when heated and stirred at 250 to 500 ° C, a metal having a diameter of 30 to 60 nm Nanopowder can be prepared.

In the step (S1B), the particle size of the metal nanopowder can be adjusted without additional addition of an organic solvent and a chemical process, and it can be manufactured in a uniform size, so it is easy to apply to mass industry.

The reducing agent may be at least one selected from the group consisting of hydrazine (N ₂ H ₄ ), sodium borohydride (NaBH ₄ ), potassium hypophosphite (KH ₂ PO ₄ ), and sodium hypophosphite (NaH ₂ PO ₄ ).

The reducing agent may be added in an amount of 10 to 40 wt%, more preferably 10 to 30 wt%, based on 100 wt% of the mixture prepared in step (S1B).

By adding the reducing agent, the mixture is reduced and precipitated in the form of a precipitate to obtain the metal nanopowder.

The metal nanopowder prepared in the step (S1C) is washed with pure water and dried for a predetermined time; may additionally include.

The drying may be general drying at room temperature or room temperature, or may be dried by applying a predetermined temperature, and the applied temperature is not limited as long as the chemical or physical properties of the metal nanopowder are not deformed within a temperature range.

As used herein, the term “pure water” refers to distilled water from which impurities have been removed by sterilization, and when the pure water is applied to the present invention, the pure water means pure water having a purity of 95% or more.

The step (S2) is a step of mixing the metal nanopowder prepared in step (S1), the first polymer raw material, and the dispersant; more specifically, 1 to 10% by weight of the metal nanopowder; 1 to 10 wt% of a metallic material; 75 to 95% by weight of the first polymer raw material; and mixing 0.1 to 5% by weight of a dispersant; may be.

The metal nanopowder is one selected from the group consisting of silver (Ag), copper (Cu), zinc (Zn), titanium (Ti), gold (Au), platinum (Pt), palladium (Pd), and oxides thereof. It may be more than one, preferably silver, copper, zinc, and may be one or more selected from the group consisting of oxides thereof.

The first polymer raw material may be at least one selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, polyurethane, polystyrene, polyvinyl chloride, polyvinyl butyral, ethylene vinyl acetate, ABS resin, polycarbonate and nylon. .

The dispersant may be at least one selected from the group consisting of magnesium (Mg), calcium (Ca), magnesium oxide (MgO), calcium oxide (CaO), and mixtures thereof.

By adding the dispersant, it is possible to improve the transparency of the finally prepared antibacterial film.

The step (S3) may be a step of mixing the mixture prepared in the step (S2) and the second polymer raw material.

The second polymer raw material may be at least one selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, polyurethane, polystyrene, polyvinyl chloride, polyvinyl butyral, ethylene vinyl acetate, ABS resin, polycarbonate and nylon. .

The first polymer raw material and the second polymer raw material may be applied identically or may be applied differently.

The step (S4) is a step of manufacturing the antibacterial film according to the present invention, and may be a step of extruding the mixture prepared by adding the second polymer raw material in the step (S3).

For the extrusion, the mixture may be put into the extruder hopper, melted while passing through a feeding zone of a screw, and then extruded at 100 to 300° C. through a die. When extruding at a temperature of less than 100 °C, equipment may be damaged due to overload of the screw, and the mixture may not be discharged because the mixture is not melted. In addition, when extruded at a temperature exceeding 300 ° C., the raw material is excessively melted and a blower is not generated, and the raw material may be burned by flowing like water. Therefore, the extrusion is preferably carried out at 100 to 300 ℃. By extruding in the above temperature range, it can be formed into a uniform surface of the antibacterial film to be produced.

The extruded antimicrobial film may additionally include a film forming step of physically pulling and oriented.

In addition, the antibacterial film may be further performed in a temperature range above the glass transition temperature (glass transition temperature) or in a temperature range below the melting point of the antibacterial film.

By performing the stretching step, the antibacterial film may have improved tensile strength and elastic modulus.

In addition, the antibacterial film manufactured by performing the (S4) step (S5) corona surface treatment; may additionally include. The corona surface treatment may be performed by applying an applied power of 3 to 10 kW to the antibacterial film. When the corotor surface treatment is performed, when the applied power is less than 3 kW, the corona surface treatment is not performed and peeling may occur after the printing process. When the applied power exceeds 10 kW, the film surface may burn out due to the excessively high applied power. Therefore, the corona surface treatment is preferably performed by applying an applied power of ∼10 kW.

The corona surface treatment generates charged particles by ionizing the air between the discharge electrode and the treatment substrate by a high or low frequency generated by flowing a high voltage between the two electrodes, and the antibacterial film surface by the particles Transformation of the film can be generated and can be more closely adhered compared to the conventional film, which can have superior strength. In addition, due to the corona surface treatment, it is possible to remove oil that may exist on the surface of the antibacterial film.

Advantages and features of the present invention, and a method of achieving them, will become apparent with reference to the embodiments described below in detail. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

Preparation Example 1. Preparation of copper nanopowder

Copper granules were added to and dissolved in an aqueous nitric acid solution to prepare a copper-nitric acid solution, wherein the copper content in the copper-nitric acid solution was prepared to be 15 wt%. The copper-nitric acid solution was heated to 180° C. for 3 hours, and hydrazine (N ₂ H ₄ ) was added as a reducing agent to obtain a copper precipitate. The precipitate was filtered using centrifugation, the filtered copper was washed with pure water, and finally dried at room temperature for 36 hours to prepare copper nanopowder.

Preparation Example 2. Preparation of Zinc Nanopowder

Zinc granules were added to and dissolved in an aqueous nitric acid solution to prepare a zinc-nitrate solution, wherein the zinc content in the zinc-nitrate solution was prepared to be 18 wt%. The zinc-nitric acid solution was heated to 165° C. for 5 hours, and hydrazine (N ₂ H ₄ ) was added as a reducing agent to obtain a zinc precipitate. The precipitate was filtered using centrifugation, and the filtered zinc particles were washed with pure water, and finally dried at room temperature for 36 hours to prepare zinc nanopowder.

Example 1. Preparation of antibacterial film 1

3% by weight of the copper nanopowder prepared in Preparation Example 1, 5% by weight of the zinc nanopowder prepared in Preparation Example 2, 90% by weight of polyethylene (PE), and magnesium and magnesium oxide as a dispersant 1:1: Mixture 2 % by weight were mixed. The mixture and polyethylene were mixed in a weight ratio of 5:5, and the mixture was put into an extruder hopper, melted while passing through a feeding zone of a screw, and then extruded at 135° C. through a die. And, physically pulling the extruded film at a temperature 50 ℃ higher than the glass transition temperature of the film to form a film, and corona surface treatment with 5 kW of applied power to finally produce the antibacterial film 1 according to the present invention did.

Example 2. Preparation of antibacterial film 2

3% by weight of the copper nanopowder prepared in Preparation Example 1, 3% by weight of the zinc nanopowder prepared in Preparation Example 2, 2% by weight of oxide of the zinc nanopowder prepared in Preparation Example 2, Polyvinyl chloride , PVC) 90% by weight and 2% by weight of a 1:1 mixture of calcium and calcium oxide as a dispersant were mixed. The mixture and polyvinyl chloride were mixed in a weight ratio of 5:5, and the mixture was put into an extruder hopper, melted while passing through a feeding zone of a screw, and then extruded at 185° C. through a die. Then, the extruded film is physically pulled at a temperature 25° C. higher than the glass transition temperature of the film to be molded into a film, and corona surface-treated with an applied power of 7 kW to finally produce an antibacterial film 2 according to the present invention did

Comparative Example 1. Preparation of Comparative Film

1.1. Preparation of Comparative Films 1 to 4

0, 2, 3 and 10% by weight of the copper nanopowder prepared in Preparation Example 1 and 100, 98, 97 and 90% by weight of polyethylene (PE) were mixed. The mixture and polyethylene were mixed in a weight ratio of 5:5, and the mixture was put into an extruder hopper, melted while passing through a feeding zone of a screw, and then extruded at 135° C. through a die. Then, the extruded film is physically pulled at a temperature 50° C. higher than the glass transition temperature of the film to form a film, and corona surface-treated with an applied power of 5 kW to finally compare films 1 to 4 according to the present invention was prepared.

[Comparative film 1 to 4 composition]

1.2. Comparative Film 5 Preparation

A comparative film 5 was prepared in the same manner as in Example 1, except that metal nanopowder was not added.

1.3. Comparative Film 6 Preparation

All conditions were the same as in Example 1, except that 10% by weight of the copper nanopowder prepared in Preparation Example 1, 10% by weight of the zinc nanopowder prepared in Preparation Example 2, and 90% by weight of polyethylene (PE) and a comparative film 6 in which magnesium and magnesium oxide 1:1: 2 wt% of a mixture were mixed as dispersants.

Experimental Example 1. Confirmation of antibacterial effect

1.1. Antibacterial effect on antibacterial film

In order to confirm the antibacterial effect of the antibacterial film of the present invention, Staphylococcus aureus (ATCC 6538P) and Escherichia coli ( Escherichia coli, ATCC 8739), the antibacterial performance against the strain was confirmed, and it is shown in FIGS. 1, 2 and [Table 1] below.

[Table 1]

1.2. Antibacterial effect on comparative films 1 to 4

As a comparative group for the antibacterial film of the present invention, the comparative films 1 to 4 prepared in the comparative examples were subjected to the same JIS Z 2801:2010 standard as Staphylococcus aureus (ATCC 6538P) and Escherichia coli ( Escherichia coli, ATCC 8739), the antibacterial performance against the strain was confirmed, and it is shown in FIGS. 3, 4 and [Table 2] below.

[Table 2]

1.3. antibacterial effect

1, 2 and [Table 1], it is confirmed that the antibacterial films 1 and 2 of the present invention prepared in Examples 1 and 2 decrease the number of Staphylococcus aureus and E. coli bacteria over time. It can be confirmed that the antibacterial activity value is also 3.0 or higher. On the other hand, referring to FIGS. 3, 4 and [Table 2], it can be seen that Comparative Films 1 to 4 in Preparation Example 1 increase the number of Staphylococcus aureus and E. coli bacteria over time, and the antibacterial activity is yellow. At least 1.2 and 0.9 for Staphylococcus aureus and Escherichia coli, it can be confirmed that the bar does not have antibacterial activity.

Through the above results, it can be confirmed that the antibacterial effect is improved by the optimal combination of the composition of the present invention, not the effect of the metal nanopowder itself.

Experimental Example 2. Confirmation of moisture permeability

In order to confirm the moisture permeability of the antibacterial film of the present invention, for the antibacterial film 1 and comparative films 5 and 6 prepared in Example 1, the moisture permeability was calculated through the following [Equation 1] according to the KS K 0594 standard, and the The results are shown in [Table 3] below.

[Equation 1]

(The above A ₁ is the weight of the specimen after 1 hour after putting the specimen in the constant temperature and humidity device, and A ₂ is the weight of the specimen after 2 hours after placing the specimen in the constant temperature and humidity device.)

[Table 3]

As can be seen in [Table 3], it can be seen that the antibacterial film 1 according to the present invention has a high moisture permeability compared to Comparative Examples 5 and 6.

Through the above results, the antibacterial film of the present invention can be applied to packaging materials of fermented or fresh food, latex gloves used in laboratories, medical sheets or dressing fabrics for wound protection, and the like.

From the above description, those skilled in the art to which the present invention pertains will be able to understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics thereof. In this regard, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (9)

Including metal nanopowder and polymer raw material,
Staphylococcus aureus ( Staphylococcus aureus ATCC 6538P), Escherichia coli (ATCC 8739) and Pneumonia rod (Klebsiella pneumoniae, ATCC 4352) antibacterial film, characterized in that the antibacterial activity value 3.0 to 7.0. According to claim 1,
The metal nanopowder is one selected from the group consisting of silver (Ag), copper (Cu), zinc (Zn), titanium (Ti), gold (Au), platinum (Pt), palladium (Pd), and oxides thereof. more than,
The polymer raw material is polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP), polyethylene terephthalate (Polyethylene terephthalate, PET), polyurethane (Polyurethane, PU), polystyrene (Polystyrene, PS), polyvinyl chloride (Polyvinyl chloride) , PVC), polyvinylbutyral (PVB), ethylene vinyl acetate (Ethylene Vinyl Acetate, EVA), ABS resin (acrylonitrile butadiene styrene copolymer), polycarbonate (Polycarbonate, PC) and from the group consisting of nylon (Nylon) Antibacterial film, characterized in that at least one selected. According to claim 1,
The antibacterial film is an antibacterial film, characterized in that it has a moisture permeability of 13 to 15 g / m ² ·day. (S1) preparing a metal nanopowder;
(S2) mixing the metal nanopowder, the first polymer raw material and the dispersant;
(S3) mixing the mixture and a second polymer raw material; and
(S4) extruding the mixture to prepare an antibacterial film; Method for producing an antibacterial film comprising the. 5. The method of claim 4,
The step (S1) is
(S1A) mixing a metal raw material and an aqueous nitric acid solution;
(S1B) adding hydrochloric acid to the mixture and heating; and
(S1C) extracting the metal nanopowder by adding a reducing agent to the mixture; 6. The method of claim 5,
The reducing agent is hydrazine (N ₂ H ₄ ), sodium borohydride (NaBH ₄ ), potassium hypophosphite (KH ₂ PO ₄ ) and sodium hypophosphite (NaH ₂ PO ₄ ) It is characterized in that at least one selected from the group consisting of Method for producing an antibacterial film. 5. The method of claim 4,
The step (S2) comprises 1 to 10 wt% of metal nanopowder; 1 to 10 wt% of a metallic material; 75 to 95% by weight of the first polymer raw material; And mixing 0.1 to 5% by weight of the dispersant; Method for producing an antibacterial film, characterized in that. 8. The method of claim 7,
The dispersant is magnesium (Mg), calcium (Ca), magnesium oxide (MgO), calcium oxide (CaO), and a method for producing an antibacterial film, characterized in that at least one selected from the group consisting of mixtures thereof. 5. The method of claim 4,
The manufacturing method of the antibacterial film is
(S5) corona-treating the antibacterial film with an applied power of 3 to 10 kW;

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