KR101599112B1 - Positive electric charge-coating agent for antivirus media, Antivirus media using that and Preparing method thereof - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a positive charge coating agent for an antiviral agent, an antiviral agent prepared using the same, and a method for preparing the same, and is an eco-friendly agent having excellent water permeability and virus removal performance, The present invention relates to an invention capable of providing virus filter media.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positive charge coating agent for an antiviral agent, an antiviral agent and an antiviral agent,

The present invention relates to a positive charge coating agent for antiviral carriers, an antiviral filter material and a method for producing the same, and more particularly to a positive charge coating agent for antiviral carriers, To an excellent possible antiviral filter material and a manufacturing method thereof.

Generally, there are numerous ionic substances and chemicals, including natural organic matter (NOM), in water, and they are not removed in the process of water treatment but act as a cause of generating new pollutants. In addition, the presence of pathogenic microorganisms, which have not been removed by chlorine disinfection, has recently been controversial. Pathogenic microorganisms, such as viruses, crytosphoridium, and Giardia, are released into the environment through human and animal feces and are present in not only sewage but also surface and groundwater. The virus has a size of 0.02 to 0.09 μm, the bacteria have a length of 0.4 to 14 μm and a width of 0.2 to 1.2 μm, and the protozoan such as cryptosporidium and xylydia is relatively larger than viruses and bacteria. Because viruses are very small in size, they are hardly treated by general filtration. They form stable cysts and survive for several months in water. At present, in order to remove trace contaminants in water, advanced coagulation treatment, activated carbon adsorption and membrane filtration are proposed in the water treatment process. Recently, a large-scale study on the water treatment process using membranes is underway.

Particularly, membrane filtration has been recently studied and commercialized in advanced water treatment process. However, it is still not widely used due to economical cost and technical problems. Existing filters including membranes classified as reverse osmosis membrane (RO), nanofiltration membrane (NF), ultrafiltration membrane (UF), and microfiltration membrane (MF), use conventional pore size to measure contaminants in water It is a system to remove.

The main mechanism for removing contaminants from the membrane is to remove bacteria, viruses and organic contaminants floating in the water by applying a sieve effect, ie removal by particle size. In addition to the removal by the particle size, electrostatic adsorption according to the surface charge of the separation membrane filters the microorganisms in the water, and this method has been studied for its high permeability and high particle removal performance compared to a small operating pressure.

The microfibre filter widely used for conventional water treatment has a disadvantage in that the efficiency is low because the filtration area is small and there is no electrostatic force. The membrane filter has a disadvantage in that the filtration efficiency is high but the pressure loss is large. Therefore, studies have been made to increase the filtration efficiency of the fiber filter and decrease the pressure loss by applying an electrostatic force to the microfine fiber filter having the micro pores to overcome the disadvantages of the microfiber filter and the membrane filter.

For example, in the prior art, a glass fiber is used as a basic filter material for the production of antiviral filter media, and a positive charge is prepared by adding an inorganic compound having a positive charge at the time of producing the glass fiber to prepare a positive charge filter. (Korean Patent Publication No. 10-2004-0301723, U.S. Patent No. 7,601,262, etc.). However, since this technique uses glass fibers, there is a concern that the water treatment process may be suitably complicated due to the hazardousness of carcinogens and the like, and there is a problem in that the compound to be added during production using glass fiber can not be diversified in the product group.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and an object of the present invention is to provide an environmentally friendly anti-virus filter material capable of effectively removing micro-sized and nano-sized viruses.

In order to solve the above-described problems, the present invention may be characterized in that the antiviral filter medium comprises a nonwoven fabric and a positive charge coating layer on the inside and the surface of the nonwoven fabric.

In a preferred embodiment of the present invention, in the antiviral filter material of the present invention, the nonwoven fabric includes at least one selected from polypropylene fiber, polyethylene terephthalate fiber, polyethylene fiber, polyester fiber, nylon fiber and cellulose fiber . ≪ / RTI >

 In a preferred embodiment of the present invention, in the antiviral filter material of the present invention, the nonwoven fabric may have a fineness of 0.5 to 10 μm and a pore size of 1 to 30 μm.

In one preferred embodiment of the present invention, in the antiviral filter material of the present invention, the nonwoven fabric may have an average thickness of 0.1 to 2 mm.

In another preferred embodiment of the present invention, in the antiviral filter medium of the present invention, the positive chargeable coating layer may include a crosslinking agent and a polyfunctional amine compound.

In another preferred embodiment of the present invention, in the antiviral filter material of the present invention, the crosslinking agent is selected from the group consisting of bisphenol A epoxy resin, bisphenol F epoxy resin, hydrogenated bisphenol A epoxy resin, hydrogenated bisphenol F epoxy resin, a brominated epoxy resin, and a Novolac type epoxy resin.

In another preferred embodiment of the present invention, in the antiviral filter medium of the present invention, the polyfunctional amine compound is at least one selected from the group consisting of polyethyleneimine, diethylene triamine, piperazine, dimethylene piperazine and diphenylamine. And the like.

In another preferred embodiment of the present invention, in the antiviral filter medium of the present invention, the crosslinking agent and the polyfunctional amine compound are contained in an equivalent ratio of 1: 0.5 to 10.

In another preferred embodiment of the present invention, the antiviral filter material of the present invention may have a surface charge of 10 to 50 mV.

In another preferred embodiment of the present invention, the antiviral filter material of the present invention may have an average water permeation rate of 20 to 150 ml / cm ² · min · bar.

In another preferred embodiment of the present invention, the antiviral filter material of the present invention may have a virus removal performance of 2 log or more.

Another aspect of the present invention relates to a positive charge coating agent for antiviral firing, comprising: a solvent; A crosslinking agent; And a polyfunctional amine compound.

As a preferred embodiment of the present invention, in the positive charge coating agent of the present invention, the solvent is at least one selected from the group consisting of dimethylacetamide, dimethylformamide, N-methyl-2-pyrrolidone, ethanol, isopropyl alcohol, acetone, And at least one selected from the group consisting of

As a preferred embodiment of the present invention, in the positive charge coating agent of the present invention, the crosslinking agent is selected from the group consisting of bisphenol A epoxy resin, bisphenol F epoxy resin, hydrogenated bisphenol A epoxy resin, hydrogenated bisphenol F epoxy resin, brominated epoxy resin, and Novolac type epoxy resin.

As a preferred embodiment of the present invention, in the positive charge coating agent of the present invention, the polyfunctional amine compound includes at least one selected from polyethyleneimine, diethylene triamine, piperazine, dimethylene piperazine and diphenylamine .

In one preferred embodiment of the present invention, the positive charge coating agent of the present invention may comprise the crosslinking agent and the polyfunctional amine compound in a ratio of 1: 0.5 to 10 equivalents.

Another aspect of the present invention relates to a method for producing an antiviral filter material, comprising the steps of: depositing a non-woven fabric on the above-described various types of positive charge coating agents to coat a non-woven fabric with a positive charge coating agent; And heat-crosslinking the nonwoven fabric coated with the positive charge coating agent to form a positive charge coating layer, thereby producing an antiviral filter medium.

In one preferred embodiment of the present invention, the precipitation is performed at 15 ° C to 40 ° C for 5 seconds to 15 hours.

In one preferred embodiment of the present invention, the thermal crosslinking may be performed by drying and crosslinking at 60 ° C to 130 ° C for 15 seconds to 8 hours.

As another preferred embodiment of the present invention, in the production method of the present invention, the nonwoven fabric prior to precipitation may be subjected to one or more methods selected from the group consisting of corona, plasma, hydro-charging, sputtering, The nonwoven fabric may be pretreated with the inside and the surface of the nonwoven fabric and thereafter the nonwoven fabric is precipitated in the positive charge coating agent.

The antiviral filter material of the present invention is coated with a superior positively charged coating agent and has a high surface charge. The antiviral filter material of the present invention is excellent in adsorption and removal ability against viruses having nano-sized anions, However, the present invention does not use this, so that it is possible to provide an environmentally friendly anti-virus filter medium.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a SEM photograph of the fibers in the nonwoven fabric before coating the antistatic antistatic coating agent of the present invention. FIG.
2 is a SEM photograph of the fibers in the nonwoven fabric of the antiviral filter material prepared in Example 1 of the present invention.

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

As described above, conventionally, there are controversial hazards of carcinogens and the like due to the use of glass fibers, and there is a concern that they are suitable for use in a water treatment process and problems in which a product group due to a compound added during production using glass fibers can not be diversified .

Accordingly, the present invention has developed a positive charge coating agent having high surface charge and excellent bonding and compatibility to a nonwoven fabric as a result of studying an antiviral filter material using an environmentally friendly nonwoven fabric instead of a glass fiber.

The present invention relates to a positive charge coating agent for antiviral carriers, wherein the positive charge coating agent of the present invention can comprise a solvent, a cross-linking agent and a polyfunctional amine compound.

In the present invention, the solvent may be at least one selected from the group consisting of dimethylacetamide, dimethylformamide, N-methyl-2-pyrrolidone, ethanol, isopropyl alcohol, acetone, ≪ / RTI > acetamide, and methanol.

In the present invention, the crosslinking agent serves not only to serve as a crosslinking agent and a binder between the polyfunctional amine compound, but also to improve the adhesion between the nonwoven fabric and the coating component. Examples of the crosslinking agent include bisphenol A epoxy resin, bisphenol F epoxy resin, A hydrogenated bisphenol A epoxy resin, a hydrogenated bisphenol F epoxy resin, a flame retardant epoxy resin, and a Novolac type epoxy resin, or a mixture of two or more of them may be used, One or more selected from bisphenol A epoxy resin, bisphenol F epoxy resin, hydrogenated bisphenol A epoxy resin, hydrogenated bisphenol F epoxy resin and novolac type epoxy resin, more preferably bisphenol A epoxy resin, Epoxy resin, hydrogenated bisphenol A epoxy resin, and novolac type epoxy One or two selected from the group consisting of paper can be used as a mixture. In the present invention, the amount of the crosslinking agent may be 0.5 to 8 parts by weight, preferably 0.8 to 7 parts by weight, more preferably 1 to 6 parts by weight, based on 100 parts by weight of the solvent. If the amount of the cross-linking agent is less than 0.5 parts by weight, the polyfunctional amine compound can easily be separated from the nonwoven fabric, the capacity of the amine compound is small and the virus adsorption is not smooth. If the amount is more than 8 parts by weight, Is too high to adequately coat the fibers of the nonwoven fabric, that is, the nonwoven fabric, there may be a problem of reduction in the amount of permeability due to reduction in pore size.

Also, in the present invention, the polyfunctional amine compound serves to impart electrostatic properties to the inside and the outside of the nonwoven fabric to exhibit a positive charge, and may include polyethyleneimine, diethylenetriamine, piperazine, dimethylenepiperazine, and diphenyl Amines, and mixtures thereof. One or more selected from diethylenetriamine and diphenylamine may be used in combination. In the present invention, the amount of the polyfunctional amine compound to be used may be 0.3 to 15 parts by weight, preferably 0.5 to 13 parts by weight, more preferably 0.5 to 10 parts by weight, based on 100 parts by weight of the solvent, If the amount of the polyfunctional amine compound used is less than 0.3 part by weight, the virus removing ability of the antiviral filter medium may deteriorate. If the amount of the polyfunctional amine compound is more than 15 parts by weight, the viscosity of the positive charge coating agent becomes too high, There may be a problem that it is not sufficiently coated, and there may be a problem that unreacted materials are eluted.

The positive charge coating agent for antiviral carriers of the present invention is used in an amount of 1: 0.5 to 10 equivalents, preferably 1: 0.8 to 9 equivalents, more preferably 1: 1 to 8 equivalents, of the crosslinking agent and the polyfunctional amine compound If the ratio is less than 0.5 equivalent weight per one weight ratio of the polyfunctional amine compound mono-crosslinking agent, it may not be possible to provide sufficient surface charge to the filter material. If the amount is more than 10 equivalents, the amount of the cross- There may arise a problem that the coating material is eluted with the coating solution.

The anti-virus filter material of the present invention can be produced by coating the above-described positive charge coating agent of the present invention with a nonwoven fabric, which will be described in more detail as follows.

The antiviral filter material of the present invention adsorbs and removes viruses, preferably adsorbs and removes viruses having a size of 5 to 90 nm, and can remove biofouling by adsorbing and controlling organic pollutants such as humic acid.

Depositing a nonwoven fabric on the various types of positive charge coating agents described above to coat the nonwoven fabric with a positive charge coating agent; And a step of thermally crosslinking a nonwoven fabric coated with a positive charge coating agent to form a positive charge coating layer. The anti-virus filter material of the present invention can be prepared through the above steps, wherein the nonwoven fabric before the precipitation in the coating step is a corona, The inner surface and the surface of the nonwoven fabric may be pretreated by one or more methods selected from the group consisting of hydrothermal treatment, hydro-charging, sputtering, primer treatment, flame treatment and acid treatment, preferably corona, plasma, The adhesion strength between the positive charge coating layer and the nonwoven fabric can be increased by using the pretreated nonwoven fabric.

The types, characteristics, and components of the positive charge coating agent used in the production method of the present invention are the same as those described above.

In the manufacturing method of the present invention, the nonwoven fabric may be applied as long as it is commonly used. Preferably, the nonwoven fabric may be a chemical bonding, a thermal bonding, an air-laid nonwoven fabric, Spun Bond, Melt Blown, and Stitch Bond electro spinning media, such as a wet-laid nonwoven fabric, a needle punching nonwoven fabric, a Spunlace nonwoven fabric, a Spun Bond, a Melt Blown, And may be any one of the forms selected.

The fibers constituting the antiviral nonwoven fabric may be at least one selected from the group consisting of polypropylene fibers, polyethylene terephthalate fibers, polyethylene fibers, polyester fibers, nylon fibers and cellulose fibers, preferably polypropylene fibers, polyethylene terephthalate fibers , Polyethylene fibers, and polyester fibers, and more preferably one or two selected from polypropylene fibers and polyethylene terephthalate fibers.

If the average thickness is less than 0.1 mm, there is a problem that the removal efficiency is reduced due to the shortage of the virus adsorption pathway. On the other hand, if the average thickness of the nonwoven fabric is less than 0.1 mm, Mm, there may be a problem that the flow rate decreases due to the generation of differential pressure during filtration.

The fibers constituting the nonwoven fabric may have a fineness of 0.5 to 10 mu m and an average pore size of 1 to 30 mu m, preferably a fineness of 0.5 to 8 mu m and an average pore size of 1 to 10 mu m, 0.5 to 5 mu m and an average pore diameter of 1 to 8 mu m. At this time, if the fineness of the fibers constituting the nonwoven fabric is less than 0.5 mu m, there may be a problem that the flow rate decreases due to the generation of the differential pressure during filtration, and if it exceeds 10 mu m, the filtration efficiency may decrease due to the decrease in porosity. If the average pore size is less than 1 占 퐉, there is a problem of decreasing the flow rate. If the average pore size exceeds 30 占 퐉, there may be a problem that the virus removal performance is decreased.

In the production method of the present invention, the precipitation of the step of coating the positive charge coating agent is preferably carried out at 15 ° C to 40 ° C, preferably at 20 ° C to 30 ° C, There is a problem that the adhesive strength of the epoxy may be decreased, and there may be a problem of explosion and harmful environment due to the generation of solvent vapor at a temperature exceeding 40 캜. Therefore, it is preferable to perform the precipitation in the above temperature range. The precipitation time is preferably 5 seconds to 15 hours, preferably 20 seconds to 13 hours.

In the production process of the present invention, the thermal crosslinking is preferably carried out by drying and crosslinking at 60 ° C to 130 ° C, preferably at 70 ° C to 110 ° C, more preferably at 80 ° C to 100 ° C, If the thermal crosslinking temperature is less than 60 ° C, the crosslinking reaction between the crosslinking agent and the amine compound may not be sufficiently performed, resulting in a decrease in the physical properties and efficiency of the manufacturing process. If the temperature exceeds 130 ° C, May be narrowed to adversely affect the water permeation amount, so it is preferable to perform thermal crosslinking within the above temperature range. The heat crosslinking time varies depending on the heat crosslinking temperature. It is preferably carried out for 15 seconds to 8 hours, preferably 30 seconds to 6 hours.

In the antiviral filter material of the present invention, a positive charge coating layer is coated on the inside and the surface of the nonwoven fabric. Preferably, the positive charge coating layer has an average thickness of 0.01 to 3 μm, preferably 0.05 to 1 μm At this time, if the average thickness of the coating layer is less than 0.01 탆, there may be a problem of physical property deviation due to reduction in coating uniformity. If the average thickness exceeds 3 탆, coating layer durability may be decreased and elution problem may occur.

The surface charge of the antiviral filter material of the present invention having the positive charge coating layer may be 10 to 50 mV, preferably 15 to 50 mV. If the surface charge of the nonwoven fabric is less than 10 mV, there may be a problem that the virus adsorbing ability is poor. When the surface charge of the nonwoven fabric is more than 50 mV, Although the adsorption capacity is similar, there is a problem that the production cost is increased due to the increase of the reaction time and the concentration to show the high surface charge in the process.

The surface electric charge can be measured based on a method calculated by the following Equation 1 by measuring the flow electric potential using a Surpass model manufactured by Anton Parr. However, the present invention is not limited thereto.

[Equation 1]

Where ζ is the zeta potential (mV), U is the streaming potential (p), η is the electrolyte viscosity, ε is the basic permittivity of the electrolyte, ε ₀ is the dielectric constant of the electrolyte, K _b : electric conductivity of electrolyte

The antiviral filter material of the present invention may have an average water permeation rate of 20 to 150 ml / cm ² · min · bar, preferably 25 to 100 ml / cm ² · min · bar.

The antiviral filter material of the present invention having a high surface charge and an average water permeability may have a virus removal performance of 2 log or more, preferably 2.5 log or more, and more preferably 3.5 log or more.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the following examples should not be construed as limiting the scope of the present invention, and should be construed to facilitate understanding of the present invention.

[ Example ]

Example  1: Antiviral Media  Produce

4.5 parts by weight of a novolak type epoxy resin and 4.5 parts by weight of polyethyleneimine were mixed with 100 parts by weight of a dimethylene acetamide solvent, and the solution was stirred at 25 DEG C for 30 minutes to dilute the solution to 20% in a methanol solution, 0.9 parts by weight of the novolak type epoxy resin and 0.9 part by weight of the polyethyleneimine were prepared in 100 parts by weight.

Next, a polypropylene nonwoven fabric having an average pore size of 6 mu m, a fineness of 3 mu m, and an average thickness of 703 mu m was immersed in the positive charge coating agent at 25 DEG C for 12 hours and then taken out of it and thermally crosslinked at 80 DEG C for 6 hours, A positive charge coating layer having an average thickness of 1 mu m was formed on the inside and the surface of the substrate.

FIG. 1 shows a photograph of the SEM measurement of the polypropylene nonwoven fabric before the precipitation with the positive charge coating agent and the thermal crosslinking treatment, and FIG. 2 shows the SEM photograph of the polypropylene nonwoven fabric after the heat crosslinking treatment. Comparing FIG. 1 and FIG. 2, it can be confirmed that a positive charge coating layer is well formed on the internal fibers of the polypropylene nonwoven fabric.

Example  2

An antiviral filter medium was prepared in the same manner as in Example 1, except that the precipitation time was only 30 seconds.

Example  3

An antiviral filter material was prepared in the same manner as in Example 1, except that the thermal crosslinking temperature and time were thermally crosslinked at 100 占 폚 for 5 minutes.

Example  4

A positive charge coating agent comprising 0.9 part by weight of the bisphenol F type epoxy resin and 0.9 part by weight of the polyethyleneimine was prepared per 100 parts by weight of the total solvent.

Example  5

Except that 0.9 parts by weight of the novolak type epoxy resin and 1.8 parts by weight of the polyethyleneimine were added to 100 parts by weight of the entire solvent and the antiviral filter media was prepared using the same Respectively.

Example  6

Except that 0.9 parts by weight of the novolak type epoxy resin and 3.5 parts by weight of the polyethyleneimine were added to 100 parts by weight of the total solvent and the antiviral filter media was prepared Respectively.

Example  7

Except that 0.9 parts by weight of the novolak type epoxy resin and 0.5 part by weight of the polyethyleneimine were added to 100 parts by weight of the total solvent and the antiviral filter media was prepared using the same Respectively.

Example  8

Except that 0.9 parts by weight of the novolak type epoxy resin and 0.9 part by weight of the diphenylamine were added to 100 parts by weight of the total solvent and an antiviral filter medium was prepared using the same. .

Example  9

An antiviral filter material was prepared in the same manner as in Example 1 except that a polypropylene nonwoven fabric having an average pore diameter of 15 μm, a fineness of 7 μm and an average thickness of 653 μm was used.

Example  10

The same procedure as in Example 1 was carried out except that the coating solution was not diluted in a methanol solution to prepare an antiviral filter medium.

Comparative Example  One

The procedure of Example 1 was repeated to prepare an antiviral filter medium, and a polypropylene nonwoven fabric was prepared in the same manner as in Example 1, except that a polypropylene nonwoven fabric having an average pore diameter of 50 μm, a fineness of 15 μm and an average thickness of 996 μm was used To prepare antiviral filter media.

Comparative Example  2

An antiviral filter material was prepared in the same manner as in Example 1, except that the thermal crosslinking temperature and time were thermally crosslinked at 50 캜 for 6 hours.

Comparative Example  3

An antiviral filter material was prepared in the same manner as in Example 1 except that thermal crosslinking temperature and time were thermally crosslinked at 145 캜 for 2 hours.

Comparative Example  4

Except that 0.9 parts by weight of the novolak type epoxy resin and 0.3 part by weight of the polyethyleneimine were added to 100 parts by weight of the total solvent and the antiviral filter media was prepared Respectively.

Comparative Example  5

Except that 0.9 parts by weight of the novolak type epoxy resin and 10 parts by weight of the polyethyleneimine were added to 100 parts by weight of the total solvent and the antiviral filter media was prepared Respectively.

Experimental Example  One

The average pore size was measured by using a membrane porosimetric analyzer (PMI, model: CFP-1200-AE) to evaluate the basic properties of the porous composite media prepared in Examples 1 to 10 and Comparative Examples 1 to 5 And the flow rate per unit area and per minute was measured at a constant pressure (1 bar) through a sample holder having a diameter of 90 mm using a flat membrane evaluator (manufactured by Woongjin Chemical Co., Ltd.).

A virus (MS2 phage) diluted to 8 x 10 < ⁵ > / ml in PFU / ml (PFU: plaque forming units) at a constant pressure of 1 bar through a sample holder having a diameter of 90 mm was used for a flat membrane evaluator (manufactured by Woongjin Chemical Co., ) Solution was permeated to evaluate microbial removal performance. The results are shown in Table 1 below.

division Equivalence ratio
(Epoxy: PEI) Non-woven
Average
Thickness (㎛) Filter media
Average pore size
(탆) Sedimentation
Temperature
(° C) Sedimentation
time Thermal crosslinking
Temperature
(° C) Thermal crosslinking
time Average permeability
(Ml / cm ² .min.bar) Surface charge
(mV) virus
Removal performance (log) Example 1 1: 2 703 6 25 12 hours 80 6 hours 73 35 4.7 Example 2 1: 2 701 6 25 30 seconds 80 6 hours 70 30 3.5 Example 3 1: 2 704 6 25 12 hours 100 5 minutes 68 30 2.6 Example 4 1: 2 702 6 25 12 hours 80 6 hours 62 28 3.8 Example 5 1: 4 702 6 25 12 hours 80 6 hours 75 36 4.9 Example 6 1: 8 702 6 25 12 hours 80 6 hours 74 42 5.1 Example 7 1: 1 699 6 25 12 hours 80 6 hours 79 23 3.0 Example 8 1: 1 708 6 25 12 hours 80 6 hours 58 26 3.4 Example 9 1: 2 653 15 25 12 hours 100 5 minutes 69 35 4.4 Example 10 1: 2 695 6 25 12 hours 80 6 hours 65 33 4.5 Comparative Example 1 1: 2 996 50 25 12 hours 80 6 hours 92 25 1.0 Comparative Example 2 1: 2 702 6 25 12 hours 50 6 hours 53 5 0.6 Comparative Example 3 1: 2 730 6 25 12 hours 145 2 hours 19 37 4.9 Comparative Example 4 1: 0.3 704 6 25 12 hours 50 6 hours 33 7 1.4 Comparative Example 5 1:11 703 6 25 12 hours 50 6 hours 38 27 1.6

As can be seen from Table 1, the virus removal performance of the antiviral filter media of Examples 1 to 10 was 2.0 log or more, preferably 2.6 to 4.7 log, depending on the conditions for producing the antiviral nonwoven fabric, And the average water permeation amount is also excellent.

However, in the case of Comparative Example 1 using nonwoven fabric having an average pore size exceeding 30 탆, there was a problem that the average water permeation amount was excellent but the virus removal performance was insufficient. In the case of Comparative Example 2 in which the thermal crosslinking temperature was less than 60 캜, the antiviral performance was poor because the positive charge coating agent component was not crosslinked well to the nonwoven fabric. In the case of Comparative Example 3 in which the thermal crosslinking temperature exceeded 130 캜, the virus removal performance was excellent, but the average water permeation amount was greatly decreased. This is because the pore size of the nonwoven fabric was affected by thermal deformation and decreased pore size.

In addition, in the case of Comparative Example 4 in which the polyfunctional amine compound was used in an amount less than 0.5 equivalence ratio with respect to one equivalent ratio of the crosslinking agent, the virus removal performance was greatly reduced and it was confirmed that the function was lost. Further, in Comparative Example 5, in which the polyfunctional amine compound was used in an amount exceeding 10 equivalents to one equivalent ratio of the crosslinking agent, there was no further improvement in the virus removal performance as compared with Example 6, and the average water permeation amount was reduced , And the virus removal performance was also decreased, which is considered to be caused by the elution of unreacted materials.

Through the above Examples and Comparative Examples, it was confirmed that the antiviral filter material of the present invention had excellent water permeation amount and virus removal performance, and that the antiviral filter material of the present invention can replace the existing organic fiber- Friendly anti - virus media.

Claims (15)

A nonwoven fabric containing at least one selected from polypropylene fibers, polyethylene fibers, polyester fibers, nylon fibers and cellulose fibers; And
A positive charge coating layer is formed on the inside and the surface of the nonwoven fabric,
Wherein the positive charge transport layer comprises a cross-linking agent and a polyfunctional amine compound,
Wherein the surface charge of the filter medium is 10 to 50 mV.
The antiviral filter material according to claim 1, wherein the nonwoven fabric has a fineness of 0.5 to 10 탆 and a pore size of 1 to 30 탆.
The antiviral filter material according to claim 1, wherein the nonwoven fabric has an average thickness of 0.1 to 2 mm.
The epoxy resin composition according to claim 1, wherein the crosslinking agent is selected from the group consisting of bisphenol A epoxy resin, bisphenol F epoxy resin, hydrogenated bisphenol A epoxy resin, hydrogenated bisphenol F epoxy resin, flame retardant epoxy resin and Novolac epoxy resin And a resin.
The antiviral filter material according to claim 1, wherein the polyfunctional amine compound comprises at least one selected from the group consisting of polyethyleneimine, diethylene triamine, piperazine, dimethylenepiperazine and diphenylamine.
The antiviral filter material according to claim 1, wherein the crosslinking agent and the polyfunctional amine compound are contained in an equivalent ratio of 1: 0.5 to 10: 1.
The antiviral filter material according to claim 1, wherein the surface charge of the filter medium is 10 to 50 mV.
8. The antiviral filter material according to any one of claims 1 to 7, wherein the average permeation amount is 20 to 150 ml / cm < ² >
9. The method of claim 8,
Wherein the virus removal performance is 2 log or more.
delete delete Depositing a nonwoven fabric on the positive charge coating agent to coat the nonwoven fabric with a positive charge coating agent; And
And thermally crosslinking the nonwoven fabric coated with the positive charge coating agent to form a positive charge coating layer,
The thermal crosslinking is carried out by drying and crosslinking at 60 ° C to 130 ° C for 15 seconds to 8 hours,
The surface charge of the filter material formed with the positive charge coating layer is 10 to 50 mV,
Wherein the positive charge coating agent is a solvent containing at least one selected from the group consisting of dimethylacetamide, dimethylformamide, N-methyl-2-pyrrolidone, ethanol, isopropyl alcohol, acetone, and methanol; A crosslinking agent containing at least one selected from the group consisting of bisphenol A epoxy resin, bisphenol F epoxy resin, hydrogenated bisphenol A epoxy resin, hydrogenated bisphenol F epoxy resin, flame retardant epoxy resin and novolak epoxy resin; And a polyfunctional amine compound containing at least one selected from the group consisting of polyethyleneimine, diethylenetriamine, piperazine, dimethylenepiperazine and diphenylamine,
Wherein the crosslinking agent and the polyfunctional amine compound are contained in an equivalent ratio of 1: 0.5 to 10: 1.
13. The method of claim 12, wherein the precipitation is performed at 15 to 40 DEG C for 5 seconds to 15 hours.
delete The nonwoven fabric according to claim 12, wherein the nonwoven fabric before the precipitation of the nonwoven fabric is subjected to a pretreatment such as a corona, a plasma, a hydro-charging, a sputter, a primer, Wherein the antiviral filter material is a biomolecule.

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