KR101628159B1

KR101628159B1 - Repeatedly available mask and preparation method thereof

Info

Publication number: KR101628159B1
Application number: KR1020150119688A
Authority: KR
Inventors: 나용훈
Original assignee: 나용훈
Priority date: 2015-08-25
Filing date: 2015-08-25
Publication date: 2016-06-08

Abstract

The present invention relates to a multi-purpose mask, and more particularly, to a mask including a web-shaped base material made of nanofibers, the base material being formed by electrospinning and containing activated carbon particles.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-

The present invention relates to a repeatable nanomask.

Recently, as the frequency and occurrence density of dust, fine dust, and ultrafine dust rapidly increase, it causes not only inconvenience of daily life but also causes respiratory and cardiovascular diseases, Demand for health masks, which are effective in blocking dust, is also rapidly increasing.

The health mask covers the nose and mouth, prevents dust and dirt from floating in the air, prevents inhalation or scattering of germs and viruses, prevents harmful substances from being absorbed into the human body through the respiratory system, Is widely used for health and hygiene purposes, and is distinguished from ordinary warming masks for protecting the face from cold and warm around the nose and mouth during cold weather in winter, and is more expensive than general warming masks.

However, the health masks that are currently on the market are used to filter fine dust and the like by using the electrostatic principle, so that when the contaminated masks are cleaned after one use, the electrostatic characteristics disappear and reusability is impossible. As a result, the consumer has a costly burden to purchase a new mask for each use.

In addition, as the number of masks discarded after use is increased as described above, waste of resources and waste are generated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a health mask which can be cleaned and used repeatedly.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. will be.

According to an aspect of the present invention, there is provided a multi-purpose mask, comprising: a base material made of a nanofiber, the base material being formed by electrospinning, activated carbon particles.

In the present invention, the base material may include activated carbon particles in the form of a plurality of activated carbon particles adhered to the outer surface of the base material to form an activated carbon layer, and a plurality of activated carbon particles are contained in the nanofibers constituting the base material. Particles.

Another aspect of the present invention relates to a method of manufacturing a multi-purpose mask, comprising the steps of: preparing a spinning solution for electric discharge for forming nanofibers; Preparing nanofibers by electrospinning the prepared spinning solution; Crosslinking the prepared nanofibers to prepare a web-shaped preform; And spraying a mixture of activated carbon particles and an organic binder on the surface of the base material to form an activated carbon layer.

Another aspect of the present invention relates to a method for manufacturing a multi-purpose mask, comprising the steps of: preparing an electric discharge solution for forming nanofibers; Adding an activated carbon powder and an organic binder to the prepared spinning solution for electric discharge to prepare a mixed spinning solution; Preparing nanofibers by electrospunning the mixed spinning solution; And cross-linking the nanofibers to produce a web-shaped preform.

According to the mask of the present invention, fine dust, bacteria and the like are physically adsorbed and blocked by the nanofiber web and activated carbon, instead of adsorbing and shielding the fine dust by the electrostatic method like the conventional mask, There is an advantage that it is possible to repeatedly use the mask without purchasing a new mask even if it is contaminated. Thus, it is possible to reduce a cost burden of a new mask purchase by a consumer and significantly reduce the amount of waste of a mask waste.

1 shows an example of a multi-use mask according to the present invention.
2 is a flowchart showing an example of a method for manufacturing a multi-use mask according to the present invention.
3 is a flowchart showing another example of a method for manufacturing a multi-purpose mask according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

1 shows an example of a multi-use mask according to the present invention.

Referring to FIG. 1, the multi-purpose mask 100 of the present invention includes a base material 110 of a web made of nanofibers. The base material 110 is provided at both ends with an earring strap (not shown) (Not shown).

The multi-use mask 100 according to the present invention is not a mask that is discarded after a single use, such as a disposable mask, and can be repeatedly used several times or several times depending on the degree of management of the user. When the air is contaminated by the exhaust gas or the exhaust gas from the vehicle, and when the patient is coughing, such as acute severe respiratory syndrome (SARS), droplets, which are droplets of droplets, come into the respiratory tract It can be used to prevent intrusion or prevent cold in winter by blocking cold outside air.

In the present invention, the base material 110 is formed by electrospinning and includes activated carbon particles.

Electrospinning is a method of producing nanofibers through an electrically charged polymer solution and a jet of a melt. When a high voltage is applied to a droplet suspended at the end of a capillary by surface tension, It is a technology applying the phenomenon that a polymer solution having a sufficient viscosity or a fiber is formed when a melt is given an electrostatic force, in consideration of an electrostatic spraying process in which fine filaments are emitted. Although the technique of manufacturing the fiber by the electrospinning method is already known in the 1930's, it does not attract commercial attention due to low productivity, unevenness of the fiber thickness, etc. However, due to the development of the fiber technology and the intense interest of the nano industry in recent years, Has attracted attention again, and thus an electrospinning device capable of producing nanofibers which are economically feasible has already been developed.

In the present invention, the activated carbon particles have a large specific surface area and thus have a large adsorption capacity. Since the developed micropores are exposed on the pore surface, they have a high adsorption rate, Economically and environmentally friendly.

In addition to various kinds of inorganic pollution sources, gaseous or liquids contaminated with bacteria and microorganisms are adsorbed on the surface of activated carbon in a solid state as the pollutant passes through the base material containing activated carbon particles. And it is known that the adsorption performance is determined by the pore structure, surface area, particle size, surface energy, etc. of the activated carbon.

In the present invention, the activated carbon particles may be included in the base material 110 in various forms, but preferably include activated carbon particles in the following two forms.

In the first form, a plurality of activated carbon particles adhere to the outer surface of the base material 110 to form an activated carbon layer. In the second form, nanofibers constituting the base material 110 have a plurality of And includes activated carbon particles in the form of containing activated carbon particles. In the case of the first embodiment, since the active carbon layer made of activated carbon particles is formed on the outer surface of the base material 110, the blocking performance against contaminants such as fine dust, bacteria, However, as the number of times of repeated use of the mask increases, there is a disadvantage that the activated carbon particles adhering to the outer surface of the base material 110 may be detached at a small amount and be lost during the washing process of the mask. On the other hand, in the case of the second embodiment, since the activated carbon particles are contained in the form that the plurality of activated carbon particles are included in the nanofibers constituting the base material 110, even if the number of repeated use of the mask 100 increases, Is less likely to be lost than the first form, while the pollutant blocking performance of the mask 100 is somewhat lower than that of the first form.

In the present invention, the activated carbon particles are not particularly limited, but may be preferably produced by carbonizing and activating plant biomass by-products. This is because the plant biomass by-product has an advantage of easily forming micropores through the carbonization process and the activation process.

As the byproducts of the plant biomass, agricultural wastes are suitable from the viewpoint of waste recycling and production cost reduction. Of these, waste wastes are particularly large in quantity and can be secured in large quantities. Coffee residues that are easy to produce as activated carbon through carbonization and activation processes, And horseshoe may be preferred.

Particularly, activated carbon particles using coffee grounds as raw materials have not only adsorption performance for fine dust and bacteria in the air but also antibacterial activity of the activated carbon itself due to the caffeine component contained in the coffee grounds, Most preferred.

The content of the activated carbon particles in the present invention is not particularly limited, but is preferably 1 to 8% by weight based on the total weight of the mask. If the content of activated carbon is less than 1 wt% based on the total weight of the mask, the performance of adsorbing contaminants on the entire mask is excessively lowered and the performance of the mask of the present invention can not be expected. If the content of activated carbon exceeds 8 wt% It is a factor that hinders the durability of the mask.

It is preferable that the size of the activated carbon particles is 10 탆 to 30 탆 in order to impart high adsorption performance to the mask of the present invention while not excessively hindering the breathability of the nanofiber web.

In the present invention, since microorganisms such as bacteria among pollutants adsorbed on the activated carbon particles can make the activated carbon particles themselves as secondary pollutants, it is preferable to use the antibacterial activated carbon particles having the antibacterial activity itself.

The antibacterial activated carbon particles can be prepared, for example, by electroplating a transition metal on the surface of activated carbon particles. Examples of the transition metal include silver (Ag), copper (Cu), nickel (Ni), and iron (Fe). In particular, transition metals have long been known to be highly reactive to living organisms in academia and show little toxicity to cells of eukaryotes, but exhibit selective toxicity only to prokaryotes, Activated carbon particles having antimicrobial activity can be prepared by plating a surface of a activated carbon particle with a transition metal such as copper, nickel or iron.

The base material 110 is not particularly limited as long as it is a polymer material that can be applied by electrospinning, but it is made of polytetrafluoroethylene (hereinafter, referred to as "PTFE") having good air permeability and high durability . Particularly, when PTFE is used as the material of the base material 110, the PTFE material has the hydrophobic characteristic, thereby maximizing the filtering effect on contaminants such as fine particles in the air.

In the present invention, the base material 110 preferably has a thickness of 0.3 to 2.0 mm and an air permeability of 250 to 1350 cc / cm 2 / sec. If the thickness of the base material is less than 0.3 mm, the air permeability will exceed 1350 cc / cm 2 / sec. However, if the thickness of the base material is less than 0.3 mm, In contrast, when the thickness of the base material exceeds 2.0 mm, the masking effect of the pollutant increases to a considerable extent, but the air permeability is drastically reduced to less than 250 cc / cm 2 / sec And it causes the breathing of the wearer to be disturbed.

In addition, since the mask of the present invention is characterized by using a physical shielding principle, unlike a mask using the existing electrostatic principle, the average pore size of the parent material 110 is 0.3 to 2 [micro] m .

An example of a method of manufacturing a mask according to the present invention will be described with reference to the flowchart shown in FIG.

Referring to FIG. 2, a method of manufacturing a mask according to the present invention includes the steps of (S10) preparing an electric discharge solution for forming nanofibers; (S11) preparing nanofibers by electrospinning the spinning liquid prepared above; (S12) cross-linking the nanofibers to produce a web-shaped preform; And spraying a mixture of activated carbon particles and an organic binder on the surface of the base material to form an activated carbon layer (S13).

The step S10 of producing the spinning solution for an electric discharge is a step of preparing an aqueous solution of a polymer to form nanofibers through electrospinning. If the aqueous solution of the polymer is capable of producing nanofibers through electrospinning, But it is preferable that the aqueous solution of polytetrafluoroethylene (PTFE) according to the present invention is a polytetrafluoroethylene (PTFE) aqueous solution capable of producing a nanofiber web having good air permeability and light weight and excellent durability.

The step S11 of manufacturing the nanofibers by electrospunning the spinning solution may be carried out under the usual conventional electrospinning conditions, but the spinning liquid ejecting speed (spinning speed) may be adjusted by applying a spinning voltage of 15 to 30 kV and a spinning distance of 5 to 20 cm 0.5 to 2.0 ml / hour. When the radiation voltage is lower than 15 kV, the fibers are not sufficiently softened. When the radiation voltage is higher than 30 kV, the fibers become finer, so that the uniform diameter nano The fibers may be spun.

The step S12 of cross-linking the nanofibers to form a web-shaped base material is a post-treatment process for enhancing the durability and stability of the web (porous sheet) made of nanofibers produced by electrospinning, Is preferably a heat treatment in a vacuum oven by a physical crosslinking method, and it is preferable to proceed in a vacuum oven at 70 to 100 DEG C for 18 to 30 hours.

In the step of forming the activated carbon layer (S13), the activated carbon particles may be preferably produced by carbonizing and activating plant biomass by-products. This is because the plant biomass by-product has an advantage of easily forming micropores through the carbonization process and the activation process. As the byproducts of the plant biomass, agricultural wastes are suitable from the viewpoint of waste recycling and production cost reduction. Of these, waste wastes are particularly large in quantity and can be secured in large quantities. Coffee residues that are easy to produce as activated carbon through carbonization and activation processes, And horseshoe may be preferred. In addition, it is preferable that the activated carbon particles use antibacterial activated carbon particles having antibacterial activity as the activated carbon particles themselves. Particularly, activated carbon particles using coffee grounds as raw materials have not only adsorption performance for fine dust and bacteria in the air but also antibacterial activity of the activated carbon itself due to the caffeine component contained in the coffee grounds, Most preferred.

In the mixture of the activated carbon particles and the organic binder, the organic binder serves to firmly adhere the activated carbon particles to the surface of the base material. The content of the organic binder is not particularly limited, but is preferably 7 to 25 parts by weight . If the content of the organic binder is less than 7 parts by weight based on 100 parts by weight of the activated carbon particles, the activated carbon particles are not firmly adhered to the surface of the base material, so that the activated carbon particles are easily separated by repeated use of the mask. If the amount is more than 25 parts by weight based on 100 parts by weight of the activated carbon particles, the content of the organic binder is excessively high, which may significantly deteriorate the adsorption performance of the activated carbon particles.

Specific examples of the organic binder include acetone, methyl ethyl ketone, methyl isobutyl ketone, 1,4-dioxane, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, chloroform, Methylene, 1,2-dichloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,1,2-trichloroethane, hexane, heptane, octane, cyclopentane, A solvent such as methanol, ethanol, isopropanol, propanol, butanol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, cyclopentanone, cyclohexanone, Propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate, propylene glycol methyl ether propionate, butyl acetate Ethyl acetate, propyl acetate, and ethyl acetate.

FIG. 3 illustrates another example of a method of manufacturing a mask according to the present invention. Referring to FIG. 3, the method for manufacturing a mask according to the present invention includes the steps of (S20) preparing an electric discharge solution for forming nanofibers; A step (S21) of preparing a mixed spinning liquid by adding activated carbon powder and an organic binder to the prepared spinning solution for electric discharge; (S22) of preparing nanofibers by electrospinning the mixed spinning solution; And a step (S23) of cross-linking the nanofibers to produce a web-shaped preform.

The step (S20) of preparing the spinning solution for electric discharge is a step of preparing an aqueous solution of a polymer to form nanofibers through electrospinning. If the aqueous solution of the polymer is capable of producing nanofibers through electrospinning, But it is preferable that the aqueous solution of polytetrafluoroethylene (PTFE) according to the present invention is a polytetrafluoroethylene (PTFE) aqueous solution capable of producing a nanofiber web having good air permeability and light weight and excellent durability.

The step (S21) of preparing the mixed spinning solution is a step of adding activated carbon powder and an organic binder to an aqueous solution of an organic solvent, and the organic binder is used in the mixing spinning solution in which the polymer compound as a main raw material of the nanofiber and the activated carbon And serves to control the viscosity of the mixed solution used in the electric room. Particularly, it contributes to prevention of the desorption of activated carbon from the nanofibers during repeated washing due to repeated use of the mask. The content of the activated carbon powder and the organic binder in the mixed spinning solution is preferably 5 to 40 parts by weight of the activated carbon powder and 2 to 6 parts by weight of the organic binder with respect to 100 parts by weight of the spinning solution for electric discharge.

The activated carbon powder may be preferably produced by carbonizing and activating plant biomass by-products. This is because the plant biomass by-product has an advantage of easily forming micropores through the carbonization process and the activation process. As the byproducts of the plant biomass, agricultural wastes are suitable from the viewpoint of waste recycling and production cost reduction. Of these, waste wastes are particularly large in quantity and can be secured in large quantities. Coffee residues that are easy to produce as activated carbon through carbonization and activation processes, And horseshoe may be preferred. In addition, it may be preferable that the activated carbon powder itself use antibacterial activated carbon particles having antibacterial activity. Particularly, activated carbon particles using coffee grounds as raw materials have not only adsorption performance for fine dust and bacteria in the air but also antibacterial activity of the activated carbon itself due to the caffeine component contained in the coffee grounds, Most preferred.

The step S22 of fabricating the nanofibers by electrospunning the mixed spinning solution may be performed under a known conventional electrospinning condition, but the spinning liquid ejection may be performed by applying a spinning voltage of 15 to 30 kV and a spinning distance of 5 to 20 cm It is preferable to spin at a speed of 0.5 to 2.0 ml / hour. When the radiation voltage is lower than 15 kV, the fibers are not sufficiently softened. When the radiation voltage is higher than 30 kV, the fibers become finer, so that the uniform diameter nano The fibers may be spun.

The step S23 of crosslinking the nanofibers to form a web-shaped base material is a post-treatment process for enhancing durability and stability of a web (porous sheet) made of nanofibers produced by electrospinning, Is preferably a heat treatment in a vacuum oven by a physical crosslinking method, and it is preferable to proceed in a vacuum oven at 70 to 100 DEG C for 18 to 30 hours.

Hereinafter, embodiments of the present invention will be described in order to facilitate understanding of the present invention. The following examples are only illustrative of the present invention, and the scope of the present invention is not limited thereto.

Example 1

PTFE and distilled water were mixed at a weight ratio of 2: 8 to prepare an electric discharge spinning solution, and the spinning solution thus prepared was electrospun to produce nanofibers. The electrospinning conditions were 20 kV voltage, 10 cm (TCD) distance between the concentrator and the tip of the radiator radial projection, 1.0 ml / h of syringe pump speed, and 110 rpm of collector speed.

The crosslinked nanofibers were thermally treated in a vacuum oven at 80 캜 for 24 hours to prepare a web-shaped mask base material.

A mixture of activated carbon particles and an organic binder was sprayed uniformly on the surface of the prepared mask base material to prepare a mask base material having an activated carbon layer formed on the surface of the base material. The content of the organic binder in the mixture of the activated carbon particles and the organic binder was 10 parts by weight based on 100 parts by weight of the activated carbon particles.

A mask was prepared by attaching earrings to both ends of the mask base material prepared above.

Example 2

First, PTFE and distilled water were mixed at a weight ratio of 2: 8 to prepare an electric spinning solution. Activated carbon powder and organic binder were added to the spinning solution to prepare a mixed spinning solution. The amount of the activated carbon powder and the organic binder was 10 parts by weight of the activated carbon powder and 3 parts by weight of the organic binder with respect to 100 parts by weight of the spinning solution for electric discharge.

The mixed spinning solution prepared above was electrospun to prepare nanofibers. The electrospinning conditions were 20 kV voltage, 10 cm (TCD) distance between the concentrator and the tip of the radiator radial projection, 1.0 ml / h of syringe pump speed, and 110 rpm of collector speed.

In order to crosslink the nanofibers prepared above, a web-shaped mask base material was prepared by heating at 80 ° C for 24 hours in a vacuum oven. A mask was prepared by bonding earrings to both ends of the prepared mask base material.

Experimental Example: Repeatability test

In order to test the repeated usability of the masks produced in Examples 1 and 2, fine dusts were applied to each of the masks of Example 1, Example 2, and Comparative Example (polypropylene material mask product of T company in the market) , Followed by washing with water and drying. This procedure was repeated five times.

Each of the masks having been subjected to the above process was exposed again to the fine dust, and then it was confirmed whether or not dust adhered to the surface of the base material of the mask.

As a result of the experiment, the masks of Examples 1 and 2 according to the present invention still have a large amount of fine dust adhered to the surface of the mask base material, so that the adsorption performance and the blocking performance against fine dust are excellent. On the other hand, It was confirmed that the fine dust was adhered to a significantly smaller extent than in Examples 1 and 2 and a considerable amount of fine dust passed through the pores of the base material of the mask.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It will be understood by those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention as defined by the appended claims and their equivalents. .

100: multi-purpose mask 110: base material
120: Earring strap

Claims

1. A mask comprising a web of a nanofiber web material,
The base material is formed by electrospinning, activated carbon particles made of coffee ground are bonded by an organic binder,
The base material has an air permeability of 250 to 1350 cc / cm2 / sec,
The activated carbon has a particle size of 10 mu m to 30 mu m.

The method according to claim 1,
Wherein the base material comprises activated carbon particles in the form of a plurality of activated carbon particles adhered to the outer surface of the base material to form an activated carbon layer.

The method according to claim 1,
Wherein the base material comprises activated carbon particles in the form that a plurality of activated carbon particles are contained in the nanofibers constituting the base material.

The method according to claim 1,
Wherein the base material is a polytetrafluoroethylene material.

The method according to claim 1,
Wherein the base material has a thickness of 0.3 to 2.0 mm.

The method according to claim 1,
Wherein the average pore size of the base material is from 0.3 탆 to 2 탆.

The method according to claim 1,
Wherein the activated carbon particles are produced by carbonizing and activating plant biomass by-products.

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The method according to claim 1,
Wherein the content of the activated carbon particles is 1 to 8% by weight based on the total weight of the mask.

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The method according to claim 1,
Wherein the activated carbon particles are antimicrobial activated carbon particles coated with a transition metal.

Preparing a spinning solution for use in an electric room for forming nanofibers;
Preparing a web of nanofibers by electrospinning the prepared spinning solution;
Crosslinking a web made of the nanofibers to produce a web-shaped preform; And
Spraying a mixture of activated carbon particles and an organic binder on the surface of the base material to form an activated carbon layer.

13. The method of claim 12,
Wherein the content of the organic binder in the mixture of the activated carbon particles and the organic binder is 7 to 25 parts by weight based on 100 parts by weight of the activated carbon particles.

Preparing a spinning solution for use in an electric room for forming nanofibers;
Preparing a mixed spinning solution by adding an activated carbon powder and an organic binder, which are made of coffee grounds, to the prepared spinning solution for electric discharge;
Preparing a web of nanofibers by electrospinning the mixed spinning solution; And
And crosslinking the web comprising the nanofibers to produce a web-shaped preform,
Wherein the mixed spinning solution is 5 to 40 parts by weight of the activated carbon powder and 2 to 6 parts by weight of the organic binder, relative to 100 parts by weight of the spinning solution for electric discharge.

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