KR20230081404A - Mask having heat generating function and fabricating and sterilizing methods thereof - Google Patents

Abstract

Provided are a mask having a heat generating function and a manufacturing method thereof, and a sterilizing method thereof. The mask having a heat generating function is coated with a conductive polymer and has the properties of generating heat when low voltage is applied, to be able to easily remove contaminants such as coronaviruses within tens of seconds. In addition, due to the unique electrostatic properties of the conductive polymer, the electrostatic properties are maintained even after heating or washing of the mask, and the surface can be easily modified to be hydrophilic or hydrophobic.

Description

Heating functional mask, its manufacturing method and sterilization method {Mask having heat generating function and fabricating and sterilizing methods thereof}

The present invention relates to a heating functional mask, a manufacturing method thereof, and a sterilization method, and more particularly, to a heating functional mask coated with a conductive polymer, a manufacturing method thereof, and a sterilization method. More specifically, a mask coated with a conductive polymer capable of generating heat by applying low voltage, maintaining static electricity even after washing and heating, and capable of hydrophilic or hydrophobic surface modification, and a manufacturing method and sterilization method will be.

Due to the recent outbreak of coronavirus (COVID-19) in Wuhan, China, more than 3.6 million confirmed cases of the virus and more than 250,000 deaths occurred in more than 210 countries as of May 5, 2020 Korean time. Although countries around the world are working to end the coronavirus, the number of infected continues to increase due to the high contagiousness of the virus, and there are many observations predicting a second pandemic. As a result, about 10 million or more masks are consumed per day in Korea alone, but most of them are discarded without reuse, raising the problem of mask waste. In addition, if contaminants such as viruses are on the inside or surface of the mask, secondary infection can occur through the hands.

Therefore, various methods for reuse and sterilization of masks have been proposed. Alternative disinfection methods using ultrasound, high-intensity ultraviolet light, and LED blue light have been proposed, but their effectiveness has not been verified, and improper use can cause skin, respiratory, or eye damage. The virus can be killed by heating the surface of the mask with a hair dryer, etc., but in this process, the mask is denatured and may lose electrostatic characteristics, which are essential elements of the mask. It is known that the mask can be reused 2-3 times without losing its electrostatic properties when dried after being treated with steam in a steamer for 20 minutes, but it has been confirmed that only the KF94 mask is effective. Moreover, sterilization through a steamer is complicated in the preparation process, requires at least 20 minutes or more for sterilization, and is difficult to sterilize in a portable manner. In addition, a method of recycling a mask using graphene or nanofibers has been proposed, but it has not been realized due to the danger that nanomaterials may bring to the human body. Recycling the mask through washing or disinfecting it with alcohol is also not a desirable method because it causes deterioration of the mask.

Scientists at the University of Hong Kong have found that the coronavirus is most active at 4 degrees Celsius and can remain viable for more than two weeks. In addition, the coronavirus was predicted to die at least 1 week at 22 degrees Celsius, within 2 days at 37 degrees Celsius, within 30 minutes at 56 degrees Celsius, and within 5 minutes at 70 degrees Celsius. In other words, the most effective way to kill the coronavirus is to raise the temperature without changing the properties of the mask.

A mask that can easily remove contaminants in a portable way, is harmless to the human body, and can be washed is required. In addition, a functional mask that can be easily manufactured with an inexpensive process and a method for using the same should be presented.

One aspect of the present invention is to provide a heating functional mask that can easily remove contaminants such as coronavirus.

Another aspect of the present invention is to provide a method for manufacturing the heating functional mask.

Another aspect of the present invention is to provide a method for sterilizing the heating functional mask.

In one aspect of the present invention,

A mask unit wrapped around a user's face and worn on the face; and

a coating layer including a conductive polymer coated on the mask;

There is provided a heating functional mask comprising a.

In another aspect of the present invention,

Coating a coating solution containing a conductive polymer on the mask part worn on the face while covering the user's face part; is provided.

In another aspect of the present invention,

There is provided a sterilization method of a heating functional mask comprising the step of connecting a power source to the heating functional mask and supplying power to generate heat.

The heating functional mask according to one embodiment is coated with a conductive polymer and has a characteristic of generating heat at a low voltage, so contaminants such as coronaviruses can be removed within several tens of seconds. In addition, due to the unique electrostatic properties of the conductive polymer, the electrostatic properties of the heating functional mask may not change even after use, washing, and heating of the mask. The surface of the heating functional mask is easily modified to be hydrophilic or hydrophobic to suit the purpose of use. As the low-voltage supply device, batteries and wired/wireless auxiliary batteries can be used to create a portable mask sterilization environment.

1 is an exemplary schematic diagram in which a heating functional mask and a portable voltage supply device are connected according to an embodiment.
Figure 2a is a scanning electron microscope (SEM) image of the mask filter before the conductive polymer is coated in Example 1,
Figure 2b is a SEM image of the mask filter after the conductive polymer is dip-coated in Example 1,
Figure 2c is a SEM image of the mask filter surface modified to hydrophobicity (hydrophobicity) after coating the conductive polymer in Example 1.
3 is a pure KF94 mask filter before conductive polymer coating in Example 1, a conductive polymer coated mask filter, and a mask filter surface modified by various methods after conductive polymer coating. show the result.
FIG. 4 shows experimental conditions of static electricity retention of a pure KF94 mask filter before coating in Example 1, a mask filter coated with a conductive polymer by dip coating, and a mask filter with a hydrophobic surface modification.
5 shows the results of measuring the heating characteristics according to the voltage of the mask coated with the conductive polymer by dip coating in Example 1.
6 shows the results of measuring the heating characteristics according to the voltage after the rinsing treatment and the hydrophobic surface modification of the conductive polymer-coated mask in Example 1.
7A and 7B show results of measuring heating characteristics according to voltage of the conductive polymer-coated mask in Example 1 using a wired auxiliary battery.
8 shows the results of measuring the heating characteristics according to the voltage of the mask earring coated with the conductive polymer in Evaluation Example 5.
9 shows the results of measuring the heating characteristics according to the voltage of the entire mask filter coated with the conductive polymer in Evaluation Example 6.

Since the present inventive concept described below may be applied with various transformations and may have various embodiments, specific embodiments are exemplified in the drawings, and the detailed description will be described in detail. However, this is not intended to limit the present creative idea to a specific embodiment, and should be understood to include all transformations, equivalents, or substitutes included in the technical scope of the present creative idea.

Terms used below are only used to describe specific embodiments, and are not intended to limit the present inventive idea. Singular expressions include plural expressions unless the context clearly dictates otherwise. Hereinafter, terms such as “comprise” or “have” are intended to indicate that there is a feature, number, step, operation, component, part, component, material, or combination thereof described in the specification, but one or the other It should be understood that the presence or addition of the above other features, numbers, steps, operations, components, parts, components, materials, or combinations thereof is not precluded.

In the drawings, the thickness is enlarged or reduced to clearly express various layers and regions. Like reference numerals have been assigned to like parts throughout the specification. Throughout the specification, when a part such as a layer, film, region, plate, etc. is said to be "on" or "above" another part, this includes not only the case directly on top of the other part, but also the case where there is another part in the middle thereof. . Throughout the specification, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. Terms are used only to distinguish one component from another.

Although the terms first, second, etc. may be used to describe various elements, components, regions, layers and/or regions, these elements, components, regions, layers and/or regions It will be understood that one should not be limited by these terms.

Also, the processes described in the present invention are not necessarily meant to be applied in sequence. For example, when a first step and a second step are described, it is understood that the first step does not necessarily have to be performed before the second step.

Hereinafter, a heating functional mask according to an embodiment, a manufacturing method and a sterilization method thereof will be described in detail with reference to the drawings.

The heating functional mask according to one embodiment,

A mask unit wrapped around a user's face and worn on the face; and

and a coating layer including a conductive polymer coated on the mask portion.

According to one embodiment, the conductive polymer is polypyrole, polythiophene, polyacetylene, polyaniline, polyphenylene sulfide, polyphenylene vinylene ), polyindole, polypyrene, polyvinyl carbazole, polyazulene, polyazephine, polyfluorene, polynaphthalene, poly( 3,4-ethylenedioxythiophene) (poly(3,4-ethylenedioxythiophene)), polystyrene sulfonate, copolymers thereof, and derivatives thereof. can

Since the conductive polymer has excellent electrical conductivity and flexibility, it can effectively generate heat even at low voltage after coating the mask, so contaminants such as coronavirus can be removed within several tens of seconds.

The conductive polymer may include, for example, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). PEDOT:PSS can be expressed as:

Since PEDOT:PSS has excellent electrical conductivity and light transmittance and excellent flexibility, it can exhibit high electrical properties without compromising the function of a mask requiring flexibility, so it is preferably used as a coating material for the heating functional mask. can

According to one embodiment, the coating layer may further include a metal material to improve antibacterial properties, mechanical properties, and/or conductivity. The metal material may have one or more shapes selected from metal nanoparticles, metal nanowires, and metal meshes. In addition, the metal material may include, for example, at least one selected from silver, platinum, copper, nickel, aluminum, alloys thereof, and oxides thereof, and the type and form of the metal may be selected in consideration of characteristics to be imparted. can

The mask part,

A mask body that surrounds a user's face;

a filter unit provided on the mask body; and

A hook part fixed to or detachably coupled to the mask body so that the mask body comes into close contact with the user's face,

The coating layer may be coated on at least one of the mask body, the filter part, and the hook part.

According to one embodiment, the surface of the heating functional mask is easily modified to be hydrophilic or hydrophobic to suit the purpose of use. The heating functional mask may further include a hydrophilic or hydrophobic surface modification layer on the surface of the coating layer. The surface modification layer includes, for example, at least one selected from fluorinated polymer particles, carbon compounds containing fluorine groups, fluorosurfactants, perfluorodecalin compounds, fatty acids and amine compounds. , The properties of the surface can be changed by modifying the surface of the conductive polymer-coated mask to be hydrophilic or hydrophobic.

According to one embodiment, the heating functional mask may further include a power supply source for receiving power. 1 is an exemplary schematic diagram in which a heating functional mask and a portable voltage supply device are connected according to an embodiment.

Referring to FIG. 1 , the power supply source is detachable from the heating functional mask. Low-voltage power may be supplied to the heating functional mask through a power supply source. As a power supply source, for example, a battery or a wired/wireless auxiliary battery may be used, and through this, a portable mask sterilization environment can be created.

According to one embodiment, the heating functional mask may further include an additional resistance control electrode in order to effectively control the resistance of the supplied power. The resistance control electrode may be, for example, a sheet, particle, wire, ribbon, tube, grid, It may be made of a mesh or a combination thereof.

As described above, since the heating functional mask includes a coating layer of a conductive polymer and can generate heat at a low voltage, contaminants such as viruses can be removed within several tens of seconds. In addition, due to the unique electrostatic properties of the conductive polymer, the electrostatic properties of the heating functional mask may not change even after use, washing, and heating of the mask.

The heating functional mask may be manufactured in the following manner.

A method for manufacturing a heating functional mask according to an embodiment,

and coating a coating solution containing a conductive polymer on a mask part worn on the face while covering the user's face part.

As described above, the conductive polymer is polypyrole, polythiophene, polyacetylene, polyaniline, polyphenylene sulfide, polyphenylene vinylene, polyindole, polypyrene, polyvinyl carbazole, polyazulene, polyazephine, polyfluorene, polynaphthalene, poly(3, It may include one compound selected from 4-ethylenedioxythiophene) (poly(3,4-ethylenedioxythiophene)), polystyrene sulfonate, copolymers thereof, and derivatives thereof, or a mixture of two or more thereof. and may include, for example, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS).

Coating of the coating solution containing the conductive polymer may be performed by, for example, dip coating, spin coating, spray coating, electrospinning, or a combination thereof. may be, but is not limited thereto.

The mask unit includes a mask body, a filter unit, and a hook unit, and at least one of the mask body, filter unit, and hook unit may be coated with a coating solution containing the conductive polymer.

A step of drying the mask part after coating the coating solution may be further included.

According to one embodiment, after forming the coating layer containing the conductive polymer, a step of surface modification to be hydrophilic or hydrophobic to suit the purpose of use may be further included. The surface modification is performed by using at least one selected from fluorinated polymer particles, carbon compounds containing fluorine groups, fluorosurfactants, perfluorodecalin compounds, fatty acids and amine compounds to improve the surface of the coating layer. The surface can be modified to be hydrophilic or hydrophobic.

A method of sterilizing a heating functional mask according to an embodiment includes connecting a power supply source to the above-described heating functional mask and generating heat by supplying power.

As shown in FIG. 1, the power supply source is detachable from the heating functional mask. Low-voltage power can be supplied to the heating functional mask through a power supply source, and the heating functional mask can effectively generate heat even at low voltage, so contaminants such as coronavirus can be removed within several tens of seconds. As a power supply source, for example, a battery or a wired/wireless auxiliary battery may be used.

A step of adjusting resistance of the power source may be further included when power is supplied. It is possible to effectively control the resistance of the power source by using an additional resistance control electrode.

Exemplary implementations are described in more detail through the following Examples and Comparative Examples. However, Examples and Comparative Examples are intended to illustrate the technical idea, and the scope of the present invention is not limited only to them.

[Example 1]

(1) Preparation of conductive polymer coating solution

As a conductive polymer coating solution, a PEDOT:PSS conductive polymer, that is, a solution of a mixture of poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate (hereinafter referred to as PEDOT:PSS coating solution) was prepared. Specifically, PEDOT: PSS (Heraeus, Clevios PH1000) was mixed with 6 vol% of ethylene glycol and 0.1 vol% of fluorine surfactant (The Chemours Company, Capstone?? FS-31) to prepare a PEDOT: PSS coating solution did

(2) Conductive polymer coating by spin coating

The PEDOT:PSS coating solution was coated on a KF94 mask filter using a spin coater. The spin coating speed was 1,000 rpm, and after removing the residue at 5,000 rpm, the mask filter coated with the PEDOT: PSS coating solution was dried in an oven at 80 ° C. to obtain a mask filter coated with a conductive polymer.

(3) conductive polymer coating by dip coating

The KF94 mask filter was immersed in the PEDOT: PSS coating solution for 1 minute. After removing the residue at 5,000 rpm using a spin coater, the mask filter coated with the PEDOT:PSS coating solution was dried in an oven at 80 ° C to obtain a mask filter coated with a conductive polymer.

(4) Hydrophilic/hydrophobic surface modification of conductive polymer-coated masks

The surface of the mask coated with the conductive polymer was hydrophobically modified using stearic acid among fatty acids. Specifically, the mask filter coated with the PEDOT:PSS conductive polymer was immersed in a stearic acid solution for 30 seconds and then dried in an oven at 80 °C.

The surface properties of the hydrophobic surface-modified mask were changed to hydrophilic again. Specifically, a hydrophilic mask was made by immersing the hydrophobic surface-modified mask with stearic acid in an FS-31 solution.

On the other hand, as a result of surface modification of the mask filter coated with the PEDOT:PSS conductive polymer using linoleic acid among fatty acids, it can be seen through the following evaluation example that the surface is modified to be hydrophobic.

[Evaluation example]

Evaluation Example 1: Scanning electron microscope (SEM) evaluation

Scanning electron microscope for the mask filter in Example 1 (1) before the conductive polymer was coated, (3) after dip coating of the conductive polymer, and (4) after coating and after hydrophobic surface modification with stearic acid. Observed, and the results are shown in Figs. 2a to 2c, respectively.

As shown in FIGS. 2A to 2C , it can be seen that there is no significant change in shape even after coating of the conductive polymer and surface modification.

Evaluation Example 2: Evaluation of hydrophilic and hydrophobic surface properties

In Example 1, in order to confirm the surface characteristics of (1) pure KF94 mask filter before coating, (2) and (3) conductive polymer coated mask filter, and (3) mask filter surface modified by various methods after coating Wetability to water was observed, and the results are shown in FIG. 3 .

As shown in FIG. 3, the surface of the pure KF94 mask filter was hydrophobic, and the surface of the conductive polymer-coated mask filter was hydrophilic. The surface modified with fatty acids such as stearic acid or linoleic acid changed the surface properties to hydrophobicity. In addition, it was confirmed that the hydrophobic surface-modified mask was treated with a fluorosurfactant to change the surface properties to hydrophilic again.

Evaluation Example 3: Test whether the mask maintains static electricity

In Example 1, it was confirmed whether the electrostatic properties of the pure KF94 mask filter before coating, the mask filter coated with a conductive polymer by dip coating, and the mask filter with hydrophobic surface modification were maintained through an experiment in which a piece of Styrofoam was pulled. In addition, it was confirmed whether the electrostatic properties of the hydrophobic surface-modified mask are maintained even after rinsing more than 10 times and heating in Evaluation Example 4 below.

An experimental situation of whether to maintain static electricity is shown in FIG. 4 . As shown in FIG. 4 , it was confirmed that the electrostatic properties of the mask were maintained in all cases.

Evaluation Example 4: Measurement of Mask Heating Characteristics Depending on Voltage

In Example 1, the voltage-dependent heating characteristics of the mask coated with the conductive polymer by dip coating were measured, and the results are shown in FIG. 5 .

In addition, after rinsing and hydrophobic surface modification of the conductive polymer-coated mask, heating characteristics according to voltage were measured, and the results are shown in FIG. 6 .

In addition, in order to determine whether heat can be generated in a portable environment, the heating characteristics according to the voltage of the conductive polymer-coated mask were measured using a wired auxiliary battery, and the results are shown in FIGS. 7A and 7B.

As shown in FIGS. 5 to 7B , in all cases, it can be seen that the mask exhibits excellent heating characteristics.

Evaluation Example 5: Measurement of heating characteristics of mask earrings according to voltage

As an application example, after coating the mask earring part with a conductive polymer, the heating characteristics according to the voltage of the mask earring coated with the conductive polymer were measured. The mask earring was coated with a conductive polymer by dip coating in the PEDOT:PSS coating solution used in Example 1.

The results of measuring the heating characteristics of the mask earring according to the voltage are shown in FIG. As shown in FIG. 8, it can be seen that the mask earring coated with the conductive polymer also exhibits excellent exothermic properties.

Evaluation Example 6: Measurement of heating characteristics of the entire mask filter according to voltage

As an application example, after coating the entire mask filter with a conductive polymer, the heating characteristics according to the voltage of the entire mask filter coated with the conductive polymer were measured. The entire mask filter was coated with a conductive polymer by dip coating in the PEDOT:PSS coating solution used in Example 1.

The results of measuring the heating characteristics of the entire mask filter according to the voltage are shown in FIG. 9 . As shown in FIG. 9, it can be seen that the entire mask filter coated with the conductive polymer exhibits excellent heating characteristics.

In the above, preferred embodiments according to the present invention have been described with reference to drawings and embodiments, but this is only exemplary, and those skilled in the art can make various modifications and equivalent other implementations therefrom. will be able to understand Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims (16)

A mask unit wrapped around a user's face and worn on the face; and
a coating layer including a conductive polymer coated on the mask;
Fever functional mask containing a. According to claim 1,
The conductive polymer is polypyrole, polythiophene, polyacetylene, polyaniline, polyphenylene sulfide, polyphenylene vinylene, polyindole ), polypyrene, polyvinyl carbazole, polyazulene, polyazephine, polyfluorene, polynaphthalene, poly(3,4-ethylenediox) An exothermic functional mask comprising one compound or a mixture of two or more selected from poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, copolymers thereof, and derivatives thereof. According to claim 1,
The heating functional mask, wherein the coating layer further comprises at least one metal material selected from metal nanoparticles, metal nanowires, and metal meshes. According to claim 3,
The metal material is a heating functional mask comprising at least one selected from silver, platinum, copper, nickel, aluminum, alloys thereof, and oxides thereof. According to claim 1,
The mask part,
A mask body that surrounds a user's face;
a filter unit provided on the mask body; and
A hook part fixed to or detachably coupled to the mask body so that the mask body comes into close contact with the user's face,
The coating layer is a heating functional mask that is coated on at least one of the mask body, the filter part, and the hook part. According to claim 1,
Heating functional mask further comprising a hydrophilic or hydrophobic surface modification layer on the surface of the coating layer. According to claim 6,
The surface modification layer includes at least one selected from fluorinated polymer particles, carbon compounds containing fluorine groups, fluorosurfactants, perfluorodecalin compounds, fatty acids and amine compounds. Functional mask. According to claim 1,
A heating functional mask further comprising a power source for receiving power. According to claim 8,
Heating functional mask further comprising a resistance control electrode for adjusting the resistance of the supplied power. According to claim 9,
The resistance control electrode may be a sheet, particle, wire, ribbon, tube, grid, or mesh including metal, metal oxide, or a combination thereof. ) or a heating functional mask made of a combination thereof. coating a coating solution containing a conductive polymer on a mask worn on the face while covering a user's face;
A method of manufacturing a heating functional mask according to claim 1 comprising a. According to claim 11,
The conductive polymer is polypyrole, polythiophene, polyacetylene, polyaniline, polyphenylene sulfide, polyphenylene vinylene, polyindole ), polypyrene, polyvinyl carbazole, polyazulene, polyazephine, polyfluorene, polynaphthalene, poly(3,4-ethylenedi Oxythiophene) (poly (3,4-ethylenedioxythiophene)), polystyrene sulfonate (polystyrene sulfonate), copolymers thereof, and derivatives thereof. Preparation of a functional exothermic mask containing a compound or a mixture of two or more thereof method. According to claim 11,
Wherein the coating is performed by dip coating, spin coating, spray coating, electrospinning, or a combination thereof. According to claim 11,
Making the surface of the coating layer hydrophilic or hydrophobic using at least one selected from fluorinated polymer particles, carbon compounds containing fluorine groups, fluorosurfactants, perfluorodecalin compounds, fatty acids and amine compounds Method for producing a heating functional mask further comprising the step of surface modification. Connecting a power source to the heating functional mask according to any one of claims 1 to 10 and supplying power to generate heat;
Sterilization method of a fever functional mask comprising a. According to claim 15,
A method of sterilizing a heating functional mask further comprising the step of adjusting the resistance of the power supply when power is supplied.

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