KR101765130B1 - 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,

TECHNICAL FIELD 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 relates to a possible antiviral filter material having excellent virus removal performance and a method for producing the same.

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 ~ 0.09 ㎛, a bacterium has a length of 0.4 ~ 14 ㎛, a width of 0.2 ~ 1.2 ㎛, and the protozoa such as cryptosporidium and zyhodia are relatively large compared to 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 a trace amount of contaminants remaining in the water, highly flocculation 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 sizes 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. 10-2004-0088046, U.S. Patent No. 7,601,262, etc.).

However, since this technique uses glass fiber, there is a concern that the water treatment process is suitably complicated due to the controversy of harmfulness such as carcinogenesis, and there is a problem in that it can not be diversified in the product group due to the compound added during the production using glass fiber.

Korean Patent Publication No. 10-2004-0088046 (Publication Date: October 15, 2004) United States Patent No. 7,601, 262 (published on October 13, 2009)

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 problems, the present invention provides a nonwoven fabric comprising at least one selected from the group consisting of polypropylene fibers, polyethylene terephthalate fibers, polyethylene fibers, polyester fibers, nylon fibers and cellulose fibers; And a positive charge coating layer on the surface of the fiber strands contained in the inside and the surface of the nonwoven fabric, wherein the positive charge coating layer includes a cross-linking agent and a polyfunctional amine compound, and the positive charge coating layer comprises a fiber strand Wherein the coating layer is formed on the surface of the coating layer with a unit area of 60% or more.

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

In one preferred embodiment of the present invention, the nonwoven fabric may have an average pore size of 0.5 to 20 탆.

In one preferred embodiment of the present invention, the crosslinking agent is selected from the group consisting of a bisphenol A epoxy resin, a bisphenol F epoxy resin, a hydrogenated bisphenol A epoxy resin, a hydrogenated bisphenol F epoxy resin, a flame retarded epoxy resin, and a Novolac ) Type epoxy resins.

In one preferred embodiment of the present invention, the polyfunctional amine compound may include at least one selected from the group consisting of polyethyleneimine, diethylenetriamine, piperazine, dimethylenepiperazine, and diphenylamine.

In one preferred embodiment of the present invention, the polyfunctional amine compound and the crosslinking agent may be contained at a weight ratio of 1: 0.5 to 4: 1.

In a preferred embodiment of the present invention, the surface charge of the filter material may be 5 to 50 mV.

In one preferred embodiment of the present invention, the average water permeation amount may be 30 to 150 ml / cm ² · min · bar.

As a preferred embodiment of the present invention, the virus removal performance may be 2 log or more.

Further, another aspect of the present invention is to provide a method for producing a bisphenol A epoxy resin composition comprising a bisphenol A epoxy resin, a bisphenol F epoxy resin, a hydrogenated bisphenol A epoxy resin, a hydrogenated bisphenol F epoxy resin, a flame retarded epoxy resin and a novolac epoxy resin A cross-linking agent containing more than one species; But are not limited to, polyethylene glycol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol ethur, diehtylene glycol ether, A hydrophilic organic solvent containing at least one selected from the group consisting of diethylene glycol methyl ether and diethylene glycol hexyl ether; And a polyfunctional amine compound containing at least one selected from the group consisting of polyethyleneimine, diethylenetriamine, piperazine, dimethylenepiperazine and diphenylamine. The present invention also provides a positive charge coating agent for antiviral fats.

In one preferred embodiment of the present invention, the hydrophilic organic solvent may include 80 to 95% by weight of glycol solvent and 5 to 20% by weight of water.

In one preferred embodiment of the present invention, the polyfunctional amine compound and the crosslinking agent may be contained in a weight ratio of 1: 0.5 to 4.

Another aspect of the present invention is a method for producing a nonwoven fabric, comprising the steps of: 1) depositing a nonwoven fabric on the positive charging coating material to coat the nonwoven fabric with a positive charge coating material; And thermally crosslinking the nonwoven fabric coated with the positive charge coating agent to form a positive charge coating layer.

In one preferred embodiment of the present invention, the precipitation is preferably performed at 15 ° C to 40 ° C for 5 seconds to 12 hours.

In one preferred embodiment of the present invention, the thermal crosslinking is preferably carried out at 60 ° C to 130 ° C for 15 seconds to 6 hours.

Another aspect of the present invention includes the above antiviral filter medium and is characterized by having an average water permeation rate of 30 to 150 ml / cm ² · min · bar at 20 to 30 ° C. and 0.8 to 1.2 bar and a virus removal performance of 2 log or more A virus removal filter is provided.

In one preferred embodiment of the present invention, the virus removal filter is preferably used as an air filter or a liquid filter.

The antiviral filter material of the present invention is coated with a superior positively charged coating agent and has a high surface charge, so that it has excellent adsorption and removal ability against a virus having a nano-sized anion. In addition, the conventional antiviral filter media have been made of glass fiber, which is a carcinogen inducer, but the present invention can provide an environmentally friendly antiviral filter material without using glass fiber.

1 is a scanning electron microscope image of an antiviral filter material according to Comparative Example 1. Fig.
2 is a scanning electron microscope image of an antiviral filter material according to Example 1. Fig.
Fig. 3 is an enlarged scanning electron microscope image of the antiviral filter medium according to Example 1. Fig.

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 an antiviral filter material using an environmentally friendly nonwoven fabric instead of glass fiber. The antiviral filter material according to the present invention adsorbs and removes viruses, preferably adsorbs and removes viruses having a size of 5 to 90 nm, removes biofouling by adsorbing and controlling organic pollutants such as humic acid have. Hereinafter, the present invention will be described in more detail.

The antiviral filter media according to the present invention may include a nonwoven fabric.

 The nonwoven fabric may be used as long as it is commonly used. Preferably, the nonwoven fabric may be selected from the group consisting of a chemical bonding, a thermal bonding, an air ray, a wet nonwoven, a needle punching nonwoven A non-woven fabric selected from the group consisting of needle punching, needle punching, spun bond, spun bond, melt blown, stitch bond, and electro spinning non- And may preferably be a melt blown.

The fibers constituting the nonwoven fabric may be made of at least one selected from polypropylene fibers, polyethylene terephthalate fibers, polyethylene fibers, polyester fibers, nylon fibers and cellulose fibers, preferably polypropylene fibers, polyethylene terephthalate fibers, At least one member selected from the group consisting of polypropylene fibers and polyethylene terephthalate fibers, and more preferably at least one member selected from the group consisting of polypropylene fibers and polyethylene terephthalate fibers.

If the average thickness is less than 0.1 mm, the virus adsorption route is short and the removal efficiency is decreased. When the coated amount is less than 0.1 mm, There may be a problem that the amount of adsorbed virus decreases, and if it exceeds 2 mm, there may be a problem that the flow rate decreases due to differential pressure during filtration.

The nonwoven fabric may have an average pore diameter of 0.5 to 20 mu m, preferably an average pore diameter of 0.5 to 10 mu m, and more preferably an average pore diameter of 0.5 to 8 mu m. At this time, when the average pore size of the nonwoven fabric is less than 0.5 탆, the water permeability may be lowered, and when the average pore size is more than 20 탆, the virus removal performance may be decreased.

The antiviral filter material according to the present invention includes a positive charge coating layer on the surface of the fiber strands contained in the inside and the surface of the nonwoven fabric. The positive charge coating layer is not formed in island form on the surface of the fiber strand, As shown in FIG.

The average thickness of the positively charged coating layer is preferably 0.05 to 1 占 퐉, and the average thickness of the positively charged coating layer may be 0.05 占 퐉. In this case, the uniformity of the coating layer may be reduced, If the average thickness exceeds 3 탆, there is a problem that the coating layer is durably dewatered and the coating material is eluted. Further, since there is no increase in the virus removal effect, it is preferable to form the positive charge coating layer so as to have an average thickness within the above range.

The positive charge coating layer is preferably formed on the surface of the fiber strands contained in the nonwoven fabric and on the surface thereof in a unit area of 60% or more, more preferably 75% or more in the unit surface area of the fiber strands good. When the positive charge coating layer is formed on the surface of the fiber strands with a unit area of less than 60%, the uniformity of the positive charge coating is lowered, resulting in non-uniformity of the property of virus adsorption.

The positive charge coating layer includes a cross-linking agent and a polyfunctional amine compound. The cross-linking agent acts not only as a cross-linking agent between the polyfunctional amine compound and the binder, but also as an adhesive between the nonwoven fabric and the coating component. 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 type epoxy resin. Type epoxy resin, bisphenol F epoxy resin, and novolac type epoxy resin may be used in combination. The bisphenol A epoxy resin may be used alone or in combination of two or more.

The polyfunctional amine compound serves to impart electrostatic properties so that the nonwoven fabric exhibits a positive charge. The polyfunctional amine compound may be one selected from the group consisting of polyethylene imine, diethylene triamine, piperazine, dimethylpiperazine, and diphenylamine. Two or more of them may be used in combination, and one or more selected from among polyethyleneimine (polyethyleneimine) and diethylene triamine may be used in combination.

The polyfunctional amine compound and the crosslinking agent are preferably contained in a weight ratio of 1: 0.5 to 4, more preferably 1: 0.5 to 1.5. When the amount of the polyfunctional amine compound and the crosslinking agent is less than 1: 0.5, the amount of the crosslinking agent to be used is small and the polyfunctional amine compound can easily be separated from the nonwoven fabric. When the ratio is more than 1: 4, The viscosity of the nonwoven fabric is too high to sufficiently coat the fibers of the nonwoven fabric, resulting in a decrease in the water permeation amount due to reduction in the pore size of the filter media, and a decrease in the positive charge property and a decrease in the virus removal rate.

In the antiviral filter medium according to the present invention, the surface charge of the filter medium is preferably 5 to 50 mV, more 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 virus adsorption is similar, there may be a problem of increased production cost due to increase of reaction time and concentration to show high surface charge in the process.

At this time, the surface electric charge can be measured based on the method calculated by the following Equation 1 by measuring the flow electric potential using the Surpass model of Anton Parr, but 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 is the electric conductivity of the electrolyte.

The antiviral filter medium according to the present invention may have an average water permeation rate of 30 to 150 ml / cm ² · min · bar, preferably 35 to 100 ml / cm ² · min · bar. There is a problem that it is difficult to use the filter as a filter when the average water permeation amount is out of the above range.

The antiviral filter material of the present invention having high surface charge and average water permeability may have a virus removal performance of 2 log or more, preferably 2.0 log to 6.0 log, more preferably 2.5 log to 6.0log .

The method for producing the antiviral filter material of the present invention described above will be described in detail as follows.

The antiviral filter material according to the present invention comprises a first step of depositing a non-woven fabric on a positively charged coating agent according to the present invention and coating a positively charged coating agent on the surfaces of the fibrous strands contained in the inside and outside of the non-woven fabric; And a second step of thermally crosslinking the nonwoven fabric coated with the positive charge coating agent to form a positive charge coating layer. Hereinafter, the present invention will be described in more detail.

In the manufacturing method of the present invention, the first step is a step of depositing a nonwoven fabric on the positive charge coating agent according to the present invention and coating a positive charge coating agent on the surface of the fiber strands contained in the inside and the outside of the nonwoven fabric.

At this time, the positive charge coating agent for the antiviral agent according to the present invention may include a crosslinking agent; Hydrophilic organic solvent; And polyfunctional amine compounds. The crosslinking agent not only serves as a crosslinking agent and a binder between the polyfunctional amine compound but also improves the adhesion between the nonwoven fabric and the coating component. The crosslinking agent is preferably a bisphenol A epoxy resin, a 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 selected from the group consisting of a bisphenol A epoxy resin, a bisphenol F Epoxy resin, hydrogenated bisphenol A epoxy resin, hydrogenated bisphenol F epoxy resin, and novolac type epoxy resin, more preferably at least one selected from the group consisting of bisphenol A epoxy resin, hydrogenated bisphenol A A epoxy resin and a Novolac type epoxy resin, or Two kinds may be mixed and used.

In addition, 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 be one selected from the group consisting of polyethyleneimine, diethylenetriamine, piperazine, dimethylenepiperazine and diphenylamine Or a mixture of two or more of them may be used, and one or two or more selected from polyethyleneimine and diethylenetriamine may be used in combination.

The polyfunctional amine compound and the crosslinking agent are preferably contained in a weight ratio of 1: 0.5 to 4, more preferably 1: 0.5 to 1.5. When the amount of the polyfunctional amine compound and the crosslinking agent is less than 1: 0.5, the amount of the crosslinking agent to be used is small and the polyfunctional amine compound can easily be separated from the nonwoven fabric. When the ratio is more than 1: 4, The viscosity of the nonwoven fabric may be too high to adequately coat the fibers of the nonwoven fabric, that is, the nonwoven fabric fibers may be insufficiently coated, thereby reducing the water permeation amount due to the decrease in pore size.

The multifunctional amine compound and the cross-linking agent can be dissolved in a hydrophilic organic solvent to control the concentration, thereby controlling the viscosity and adsorption degree of the coating agent. Further, by using the hydrophilic organic solvent, hydrophobic nonwoven fabric fibers can be coated to modify the nonwoven fabric to be hydrophilic. The hydrophilic organic solvent preferably contains 80 to 95% by weight of glycol solvent and 5 to 20% by weight of water, more preferably 85 to 95% by weight and water of 5 to 15% by weight. The glycol solvent may be selected from the group consisting of polyethylene glycol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol ethyl ether, diethylene glycol ethyl ether, diethylene glycol ethyl ether, diethylene glycol methyl ether, diethylene glycol hexyl ether, and the like. When the hydrophilic organic solvent contains less than 80% by weight of the glycol solvent, the coating solution may be unevenly formed and the coating layer may be difficult to form on the surface of the fiber strands contained in the nonwoven fabric. The reaction between the crosslinking agent and the amine compound is generated in the solution and the nonwoven fabric coating efficiency is reduced.

The hydrophilic coating layer can be more uniformly formed on the surface of the fibers of the hydrophobic nonwoven fabric by preparing the positive charge coating agent using the hydrophilic organic solvent. More specifically, the hydrophilic coating layer can be formed on the surface of the fiber strands The coating layer can be formed with a unit area of 60% or more, preferably 75% or more.

The polyfunctional amine compound and the crosslinking agent are preferably contained in an amount of 0.1 to 5 wt%, more preferably 0.1 to 3 wt%, based on the total weight of the positive charge coating agent for antiviral agent. If the polyfunctional amine compound and the crosslinking agent are contained in an amount of less than 0.1% by weight based on the total weight of the antistatic antistatic coating agent, the content of the polyfunctional amine compound and the crosslinking agent may be too small to provide sufficient surface charge to the filter material And also. When the amount of the non-woven fabric is more than 5% by weight, the viscosity of the positive charge coating agent becomes too high, so that the inside of the non-woven fabric, that is, the fibers of the non-woven fabric may not be sufficiently coated, and unreacted materials may be eluted.

The non-woven fabric may be any of those conventionally used. Preferably, the non-woven fabric may be a chemical bonding, a thermal bonding, an air ray, a wet non-woven, A material selected from the group consisting of needle punching, spun bond, spun bond, melt blown and stitch bond electro spinning media Lt; / RTI >

In the method for preparing an antiviral filter material according to the present invention, the precipitation is preferably performed at 15 ° C to 40 ° C for 5 seconds to 12 hours, preferably at 20 ° C to 30 ° C, , There may be a problem that the adhesive strength of epoxy may be decreased. In case of performing at a temperature exceeding 40 캜, there may be a harmful environment due to the generation of solvent vapor and an explosion, so 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 method for producing the antiviral filter material according to the present invention, the positive charge coating layer may be formed by thermally crosslinking the nonwoven fabric coated with the positive charge coating agent in the step 2. In this case, the thermal crosslinking is preferably performed at 60 to 130 ° C Crosslinking at 80 ° C. to 100 ° C. is preferable. 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 carried out, resulting in a decrease in the physical properties and the efficiency of the manufacturing process If the temperature is higher than 130 ° C, thermal deformation of the nonwoven fabric may be caused and the pores of the filter medium may be narrowed to adversely affect the water permeation amount. Therefore, it is preferable to perform thermal crosslinking within the temperature range. The heat crosslinking time varies depending on the heat crosslinking temperature. It is preferably carried out for about 15 seconds to 6 hours, preferably for 30 seconds to 4 hours.

The present invention can provide a virus removal filter containing the antiviral filter media.

By including the anti-virus filter material according to the present invention, the virus removal filter can remove nano-sized viruses while maintaining the high flow rate characteristics of the conventional nonwoven fabric. Specifically, the positive charge coating layer has an average permeation rate at 20 to 30 ° C. and 0.8 to 1.2 bar by using an antiviral filter medium having a coating layer formed on the surface of the fibrous strands contained in the nonwoven fabric and on the surface thereof in a unit area of 60% Is in the range of 30 to 150 ml / cm ² · min · bar, and the virus removal performance can be 2 log or more.

At this time, the virus removal filter may be any filter capable of containing the antiviral filter material manufactured according to the present invention, and is not particularly limited, but may be preferably used as an air filter or a liquid filter.

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

10 parts by weight of distilled water and 88 parts by weight of diethylene glycol ethyl ester were mixed with 1 part by weight of polyethyleneimine and 1 part by weight of novolak type epoxy resin and stirred at 25 DEG C for 30 minutes to prepare a positive charge coating agent.

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 700 mu m was immersed in the positive charge coating agent at 25 DEG C for 30 seconds and then taken out of it and thermally crosslinked at 80 DEG C for 6 hours, Virus filter media were prepared.

Example  2-12. Antivirus Media  Produce

The antiviral filter material was prepared in the same manner as in Example 1 except that the conditions were the same as in Table 1 below.

Comparative Example  One

An antiviral filter material was prepared using a polypropylene nonwoven fabric having an average pore diameter of 6 mu m and an average thickness of 700 mu m.

Comparative Example  2-7

The antiviral filter material was prepared in the same manner as in Example 1 except that the conditions were the same as in Table 1 below.

division
Non-woven
Average pore size
(탆)
Non-woven
Average thickness
(탆)
Polyethyleneamine
(weight%)
Cross-linking agent
(weight%)
menstruum
water
(weight%)
Precipitation temperature
(° C)
Settling time
(second)
Thermal crosslinking temperature
(° C)
Thermal crosslinking
time
(time)
content
(weight%)
Kinds Example 1 6 700 One One 88 One 10 25 30 80 6 Example 2 6 700 0.5 0.5 88.5 One 10.5 25 30 80 6 Example 3 6 700 One One 93 One 5 25 30 80 6 Example 4 6 700 0.5 1.5 88 One 10 25 30 80 6 Example 5 6 700 One One 88 One 10 25 30 130 10 minutes Example 6 6 700 One One 88 One 10 25 60 80 6 Example 7 6 1400
Lamination One One 88 One 10 25 30 80 6 Example 8 6 700 2 One 88 One 10 25 30 80 6 Example 9 6 700 2 2 86.5 One 9.5 25 30 80 6 Example
10 6 700 One One 88 2 10 25 30 80 6 Example
11 6 700 One One 88 3 10 25 30 80 6 Comparative Example 1 6 700 - - - - - - - - - Comparative Example 2 50 700 One One 88 One 10 25 30 80 6 Comparative Example 3 6 700 One One 88 One 10 25 30 50 6 Comparative Example 4 6 700 One One 88 One 10 25 30 145 2 Comparative Example 5 6 700 0.2 1.8 88 One 10 25 30 80 6 Comparative Example 6 6 700 One One 78 One 20 25 30 80 6 Comparative Example 7 6 700 4 4 83 One 9 25 30 80 6

In this case, the solvent type 1 is diethyleneglycol ethyl ethyl ether, 2 is polyethylene glycol, and 3 is ethylene glycol.

Experimental Example  One

A photograph of SEM (Maker: SEC, model: SNE-3000M) measurement of polypropylene nonwoven fabric before precipitation and thermal crosslinking with the positive charge coating agent prepared in Comparative Example 1 is shown in FIG. 1, SEM measurement photographs of the viral filter media are shown in Figs. 2 and 3. Fig.

1 and 2, it can be seen that the surface of the non-woven fabric without coating is smooth, and in the case of the antiviral filter material according to the present invention, it is confirmed that a positive charge coating layer is formed on the fiber surface of the polypropylene non-woven fabric I could. In addition, according to FIG. 3, which is a more enlarged SEM measurement photograph, it can be confirmed that a coating layer is formed so as to surround the whole of the fiber strands, although there is a part formed by leaving a part of the coating layer on the surface of the antiviral filter medium.

Experimental Example  2

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 (manufactured by Woongjin Chemical Co., Ltd.) diluted to 8 × 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 phage solution to evaluate microbial removal performance. The results are shown in Table 2 below.

division Before and after coating
Weight increase and decrease
(%) unit
Per area
Coating rate (%) Surface charge
(mV) Average permeability
(Ml / cm ² .min.bar) virus
Removal performance
(log) Remarks Example 1 15 92 35 75 5.1 - Example 2 6 89 18 72 3.5 - Example 3 18 92 40 80 4.7 - Example 4 24 95 15 68 2.4 - Example 5 14 95 35 73 5 - Example 6 17 92 36 74 5.1 - Example 7 15 92 36 72 5.8 - Example 8 13 92 39 79 5.5 - Example 9 25 95 37 76 5.4 - Example 10 8 88 15 73 2.7 - Example 11 9 95 27 73 3.5 - Comparative Example 1 - - -35 68 0.1 Coating layer
Not formed Comparative Example 2 12 83 40 380 One - Comparative Example 3 4 57 -5 69 0.1 - Comparative Example 4 - - - - - Nonwoven Recording Comparative Example 5 42 84 4 66 0.7 - Comparative Example 6 - - - - - Solution unevenness Comparative Example 7 - - - - - Solution unevenness

As can be seen from Table 2, the virus removal performance of the antiviral filter media of Examples 1 to 11 was found to be about 65 ml / cm ² · min · bar or more, preferably 70 To 80 ml / cm ² · min · bar, and the virus removal performance is 2.0 log or more, preferably 2.6 to 6 log. Specifically, according to the present invention, an antiviral nonwoven fabric having a water permeation rate of 70 ml / cm ² · min · bar or more and a virus removal performance of 5 log or more can be produced.

However, in the case of Comparative Example 1 in which the coating layer was not formed, the average water permeation amount was not significantly lowered, but the coating layer was not formed, and the surface charge of the nonwoven fabric was negatively charged. In the case of Comparative Example 2 using a nonwoven fabric having an average pore size of 50 탆, there was a problem that the average water permeation amount was excellent but the virus removal performance was insufficient.

In Comparative Example 3 in which the thermal crosslinking temperature was less than 60 캜, the surface resistance and the antiviral performance were poor, because the components of the positive charge coating agent were not crosslinked well to the nonwoven fabric. In addition, heat crosslinking was performed at a temperature exceeding the melting point of the nonwoven fabric of Comparative Example 4 in which the thermal crosslinking temperature exceeded 130 캜, thereby causing the nonwoven fabric to melt.

In the case of Comparative Example 5 in which a coating agent prepared by introducing a polyfunctional amine compound and a crosslinking agent in a weight ratio of 1: 9 was used, the polyfunctional amine compound and the crosslinking agent were introduced at a weight ratio of 1: 0.5 to 4, Compared with Example 4, it was confirmed that the virus removal performance was remarkably low and the average water permeation amount was also decreased. This is because the high electric charge of the polyethyleneimine was offset by the high content of the crosslinking agent.

Furthermore, in the case of Comparative Example 6 in which the concentration of diethylene glycol ether as a hydrophilic organic solvent was less than 80% by weight, the coating agent was made into a non-uniform solution, making it difficult to form a coating layer. Further, even in the case of Comparative Example 7 in which the polyfunctional amine compound and the crosslinking agent were introduced in an amount of 8% by weight based on the total coating solution, the coating agent was made into a nonuniform solution and difficult to form a coating layer. It was found that the uniformity of the coating solution was affected by the type and concentration of the crosslinking agent, the polyfunctional amine and the solvent.

Through the above examples and comparative examples, it was confirmed that the antiviral filter material of the present invention has excellent water permeation amount and virus removal performance by appropriately introducing the types and concentrations of the cross-linking agent, the polyfunctional amine and the solvent. It is confirmed that the filter media is an eco - friendly antiviral filter material that can replace the existing organic fiber - based antiviral filter media.

Claims (17)

delete delete delete delete delete delete delete delete delete A positive charge coating agent for forming a positive charge coat layer on a nonwoven fabric formed of polypropylene fibers,
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;
For example, polyethylene glycol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol ether, diethylene glycol ethyl ether, , A hydrophilic organic solvent containing at least one glycol solvent selected from diethylene glycol methyl ether and diethylene glycol hexyl ether; And
A polyfunctional amine compound containing at least one member selected from the group consisting of polyethyleneimine, diethylenetriamine, piperazine, dimethylenepiperazine and diphenylamine; / RTI >
Wherein the hydrophilic organic solvent comprises 85 to 95% by weight of the glycol solvent and 5 to 15% by weight of water,
Wherein the crosslinking agent and the polyfunctional amine compound are formed of polypropylene fibers in an amount of 0.1 to 5% by weight based on the total weight of the non-woven fabric.
delete delete 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,
For example, polyethylene glycol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol ether, diethylene glycol ethyl ether, , A hydrophilic organic solvent containing at least one glycol solvent selected from diethylene glycol methyl ether and diethylene glycol hexyl ether, and
A polyfunctional amine compound containing at least one member selected from the group consisting of polyethyleneimine, diethylenetriamine, piperazine, dimethylenepiperazine and diphenylamine,
Wherein the hydrophilic organic solvent comprises 85 to 95% by weight of the glycol solvent and 5 to 15% by weight of water, and wherein the crosslinking agent and the polyfunctional amine compound are contained in an amount of 0.1 to 5% Precipitating the nonwoven fabric; And
And thermally crosslinking the polypropylene nonwoven fabric to form a positive charge coating layer,
Wherein the positive charge coating layer is coated on at least 75% of the entire surface of the fiber strands contained in the inside and the surface of the nonwoven fabric.
14. The method of claim 13, wherein the precipitation is performed at 15 DEG C to 40 DEG C for 5 seconds to 12 hours.
14. The method for producing an antiviral filter material according to claim 13, wherein the crosslinking is carried out at 60 DEG C to 130 DEG C for 15 seconds to 6 hours.




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