KR20140137195A - Liquid Treating Chemical Filter Using Nano-Fiber Web Having Ion Exchange Resin Particle and Method of Manufacturing the Same - Google Patents

Abstract

The present invention relates to a liquid-treating chemical filter using a nanofiber web having ion exchange resin particles and to a manufacturing method of the liquid-treating chemical filter. The liquid-treating chemical filter can perform a water treatment filter function that allows the surface filtration and depth filtration of liquid due to the lamination structure of first and second nanofiber webs having three-dimensional micropores and can simultaneously perform a chemical filter function that allows the filtration of a specific ion from a chemical substance included in liquid by the ion exchange resin particles.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid-treated chemical filter using a nanofiber web having ion-exchange resin particles, and a method for manufacturing the same.

The present invention relates to a liquid treatment chemical filter using a nanofiber web having ion exchange resin particles and a method for producing the same, State that the second nanofiber web is laminated on the surface of the second nanofibrous web, and that the liquid can be subjected to surface filtration and deep filtration, and the ion exchange resin particles can be used to filter out specific ions of the chemical substance contained in the liquid The present invention relates to a liquid treatment chemical filter using a nanofiber web having exchangeable resin particles and a method of manufacturing the same.

In general, the treatment methods of water pollutants include coprecipitation using wastewater treatment coagulant, flotation method by specific gravity difference, bioconcentration method, and ion exchange sorption method, but ion exchange sorption method is known as the most effective method.

Korean Patent Laid-Open Publication No. 2011-85096 proposes a composite filter in which activated carbon fibers and ion exchange fibers are laminated on the side wall of the housing. However, the size of the filter is large in the form of a composite filter capable of downsizing the water purifier, to be.

Korean Patent Registration No. 507969 discloses a method of producing a web by forming a web of ion exchange fiber on an ion exchange nonwoven fabric, sprinkling ion exchange resin on the web, placing an ion exchange nonwoven fabric thereon, There has been proposed a technique of removing ionic gas such as acidic or alkaline present in a clean room of a semiconductor manufacturing process. However, it has a disadvantage in that it can not filter ionic gas and filter chemical ions contained in the liquid.

On the other hand, microporous membranes have been used in material separation processes and are manufactured by various methods to have various structures and functions. Among them, studies on water treatment membranes have been started for a long time

BACKGROUND ART [0002] Membrane technology has been widely used in the field of liquid treatment such as removal of contaminants in liquids or separation, concentration and recovery of useful substances as membrane manufacturing technology and application technology are developed remarkably.

Membrane technology is replacing existing technologies due to constant performance and stability due to membrane pore size, convenience due to automation, and simple system.

Conventionally, membranes used in liquid filters include porous membranes and calendered nonwovens.

The porous membrane is a membrane that forms a membrane by using a polymer material such as PTFE, nylon, or polysulfone, and then forms pores by a chemical or physical method. Since the pore structure at this time is a closed pore structure having a two-dimensional shape, the filter efficiency is low.

In the past, when a hydrophobic polymer such as PTFE is used, since the pore structure has a closed pore structure having a two-dimensional shape, since the liquid does not pass therethrough, it is used as a filter requiring pressure, , And low volume is pointed out as a problem.

Furthermore, the thickness of the porous membrane is thicker because the thickness of the porous material is 100 μm depending on the material. Therefore, there is a problem that it is difficult to bend the porous membrane filter material and to introduce a large amount of arsenic into the filter.

On the other hand, the calendered nonwoven fabric is made of a polymer material such as polypropylene, which is formed by melt-blown spinning. However, since the size of the nonwoven fabric is in the order of micrometers, it has no micropores and fibers are not uniformly distributed The pores are uneven, and the pollutants are concentrated through the large pores and the filter efficiency is low.

Also, the calendered nonwoven fabric has an average pore size of 5 to 20 μm, and excessive calendering is required to reduce the average pore size of the filter to 3 μm or less. However, since excessive calendering prevents voids and reduces porosity, if the calendered nonwoven fabric is used as a liquid treatment filter, the filter pressure becomes high and the pores are blocked quickly, which causes a problem in filter life.

Therefore, even if a liquid processing module is manufactured using existing membrane technology, there is a problem that fluid flow is reduced due to membrane clogging and operation pressure is increased.

This clogging phenomenon is particularly serious in high concentration fluids, and it is impossible to apply the membrane technology to high concentration and high turbidity fluids, and the pores are gradually widened, resulting in poor durability.

Accordingly, it is urgently required to develop a membrane having a high filtration efficiency and a high filtration efficiency depending on the pore size as a thin membrane having a micropore structure so that it can be used for liquid treatment.

Korean Patent Laid-Open Publication No. 2008-60263 discloses a nonwoven fabric comprising at least one nanofiber layer of polymer nanofibers having an average fiber diameter of less than about 1 占 퐉 and having an average flow pore size of from about 0.5 占 퐉 to about 5.0 占 퐉 , A solids content of from about 15% to about 90% by volume, and a flow rate of water through the medium at differential pressures of 10 psi (69 kPa) greater than about 0.055 L / min / cm ² .

The manufacturing method of the filtration medium proposed in the above-mentioned Patent Publication No. 2008-60263 includes a radiation beam including at least one radiation beam including a radiation nozzle, a blowing gas injection nozzle and a collector, Blown together with a blowing gas discharged from a gas injection nozzle while compressing and discharging a polymer solution from a spinning nozzle to form a fibrous web of nanofibers using a fine fiber spinning apparatus in which a high voltage electric field is maintained, And is collected on the moving collecting device by a single pass under the radiation beam.

In addition, in JP-A-2008-60263, there is illustrated an example of forming a web by spinning nanofibers using a solution containing 24% by weight of nylon in formic acid as a polymer solution by an electroblow spinning or an electric blowing method .

However, the method of forming the fibrous web of nanofibers in the above-mentioned Patent Publication No. 2008-60263 can not be said to be a manufacturing technique using a multi-hole spinning pack. Further, in order to increase the productivity, an air electrospinning method using an air electrospinning (AES) method using a multi-hole spinning pack having a plurality of spinning nozzles in a plurality of rows and columns and air- When a nanofiber web is manufactured, the spinning solution containing 24% by weight of the polymer has a viscosity increased to solidify on the surface of the solution, making it difficult to spin for a long time, and the fiber diameter can not be increased, A problem arises.

Moreover, ultrafine fiber webs obtained by electrospinning have a problem in that when the pretreatment process for appropriately adjusting the amounts of the solvent and moisture remaining on the web surface is not performed before calendering, the strength of the web is weakened Or if the volatilization of the solvent is made too slow, the phenomenon of melting of the web may occur.

On the other hand, a filter material for a liquid filter using electrospun nanofiber web described in Korean Patent Publication No. 2012-02491 filed by the present applicant, a method for producing the same, and a liquid filter using the filter material have a three-dimensional microporous structure So that the filter efficiency can be maximized with high efficiency and long life.

 Therefore, it is possible to produce a filter for a liquid using such a multi-layered nanofiber web. However, the filter for liquid does not have a filter function of a chemical substance contained in the liquid, so that specific ions of a chemical substance contained in the liquid are filtered It is required to carry out research in a direction in which a liquid filter can be manufactured so as to have the function of being able

The inventors of the present invention have conducted research with a feature of filtering a specific ion of a chemical substance in a liquid filter using a multi-layered nanofiber web according to this direction, and have found that a more economical liquid chemical compound Thus completing the present invention.

Korea Patent Publication No. 2011-85096 Korean Patent No. 507969 Korean Patent Publication No. 2008-60263 Korean Patent No. 2012-02491

As described above, the filter to which the ion-exchange fiber is applied is large in size and does not filter the chemical ions contained in the liquid. The filtration membrane of the liquid treatment membrane has a low filtering efficiency, and the fibrous web obtained by electrospinning has a fibrous shape There is a problem that can not be made.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and it is an object of the present invention to provide a method for surface filtration and deep filtration of a liquid by a laminated structure of first and second nanofiber webs having three- And a liquid treatment chemical filter using nanofibrous webs having ion exchange resin particles capable of filtering specific ions of chemical substances contained in the liquid, the ion exchange resin particles being dispersed outside the nanofibers inside the second nanofiber web, and And a method for manufacturing the same.

Another object of the present invention is to provide a liquid treatment chemical filter using a nanofiber web having ion exchange resin particles capable of improving the reliability of chemical filtering by preventing movement of ion exchange resin particles which can be flowed by electric spraying, Method.

Another object of the present invention is to provide a liquid chemical filter using a nanofiber web having ion exchange resin particles capable of performing various filtration functions by designing the thickness of the web and the diameter of the nanofibers differently, and a method for manufacturing the same. .

Another object of the present invention is to provide a nanofiber web having ion-exchange resin particles capable of minimizing radiation or jetting trouble by guiding nanofibers or sprayed beads emitted by air injection, And a method of manufacturing the same.

It is still another object of the present invention to provide a nanofiber web having ion exchange resin particles which is thin and light in thickness and which can prevent deterioration of filter efficiency due to a multi-layered structure, by calendering at a high temperature and a high pressure so as to have a micropore size Liquid chemical filter and a method of manufacturing the same.

It is still another object of the present invention to provide a nanofiber web having a three-dimensional network structure as a membrane and having a large specific surface area and having a small average pore size and a large maximum pore size. A chemical filter and a method of manufacturing the same.

It is still another object of the present invention to provide a nanofiber web having ion-exchange resin particles having a large amount of impurity particles, a high impurity removal rate, and excellent filter-filtering characteristics by using a nanofiber web having a three-dimensional network structure as a membrane Liquid chemical filter and a method of manufacturing the same.

It is still another object of the present invention to provide a liquid treatment chemical filter using a nanofiber web having ion-exchange resin particles having high pores and high flow rates by using a nanofiber web having a three-dimensional network structure as a membrane, .

According to an embodiment of the present invention, there is provided a multi-layer nanofiber web comprising: a first multi-layer nanofiber web;

An ion exchange resin particle dispersed in the first multi-layer nanofiber web and positioned outside the nanofibers; And

A liquid treatment chemical filter using a nanofibrous web having ion exchange resin particles, characterized in that it comprises a second multi-layered nanofiber web laminated to the first multi-layered nanofiber web to prevent movement of the ion exchange resin particles. to provide.

Wherein a support is formed on either one of the first multi-layered nanofiber web, the second multi-layered nanofiber web, and the first and second multi-layered nanofiber webs.

Wherein the ion exchange resin particles are cation exchange resin particles or anion exchange resin particles.

The ion exchange resin particles are characterized by particles of a porous organic polymer having ion exchange ability or particles of a copolymer of polystyrene and divinylbenzene.

And the thickness of the first nanofiber web and the thickness of the second nanofibrous web are different from each other.

The diameter of the nanofiber of the first nanofiber web and the diameter of the nanofiber of the second nanofiber web are the same or different.

Characterized in that the first and second nanofiber webs are subjected to surface filtration and deep filtration of the treated water and specific ions of the chemical substance contained in the treated water are filtered in the ion exchange resin particles.

Wherein the average pore size of the first nanofiber web is greater than the average pore size of the second nanofiber web.

The support is characterized by being a nonwoven fabric or an imitation.

The liquid treatment chemical filter may be a flat plate type structure in which a plurality of the first and second nanofiber webs are laminated with the support or a roll type in which the first and second nanofiber webs Structure.

According to another embodiment of the present invention, there is provided a method of preparing a polymer solution, comprising: preparing a first spinning solution by mixing a polymer material and a solvent;

Forming a first multilayer nanofiber web by first electrospinning the first spinning solution;

Mixing the ion exchange resin particles with a solvent to prepare a solution for fractionation;

Dispersing the ion exchange resin particles in the first multi-layered nanofiber web by electro-spraying the dispersion solution;

Mixing a polymer material and a solvent to prepare a second spinning solution; And

And a step of secondly spinning the second spinning solution to form a second multi-layered nanofiber web on the first multi-layered nanofiber web in which the ion exchange resin particles are dispersed. A process for producing a treated chemical filter is provided.

And air is sprayed to prevent the emitted nanofibers and injected beads from being blown during the first and second electrospinning and the electrospinning.

The size of the beads adjacent to the first multi-layered nanofiber web is smaller than the size of the first bead sprayed.

The diameter of the nanofiber of the first nanofiber web and the diameter of the nanofiber of the second nanofiber web are the same or different.

And a calendering step of thermally compressing the first and second nanofiber webs after the second nanofiber web is formed.

As described above, in the present invention, the liquid can be subjected to surface filtration and deep filtration with the laminated structure of the first and second nanofiber webs having three-dimensional micropores, and the nanofibers inside the first and second nanofiber webs The ion-exchange resin particles dispersed outside can filter specific ions of the chemical substance contained in the liquid.

In the present invention, in order to prevent the movement of the ion exchange resin particles seated on the first nanofiber web by the electric spraying, the second nanofiber web may be laminated on the first nanofiber web to ensure the reliability of the chemical filtering .

In the present invention, the thickness of the first and second nanofiber webs and the diameter of the nanofibers may be designed differently to perform various filtering functions.

In the present invention, spinning or spraying while performing air injection can prevent the nanofibers or injection beads from flying, thereby minimizing radiation or jetting trouble.

In the present invention, nanofiber web having electrospinning three-dimensional fine pores is used as a membrane, and durability is good, and hydrophilic resin as well as hydrophilic resin can be applied due to capillary phenomenon.

In the present invention, because calendering is performed at a high temperature and a high pressure so as to have a fine pore size, the filter efficiency can be prevented from being reduced due to the thinness of the thickness and the multilayer structure.

In the present invention, when a nanofiber web having a three-dimensional network structure is used as a membrane, the specific surface area is large, the average pore is small, and the maximum pore is large.

In the present invention, the amount of trapping of the impurity particles is large, the impurity removal rate is high, and the filter filtering property is excellent.

In the present invention, it is possible to realize a liquid processing chemical filter having high pores and a high flow rate.

1 is a schematic view of an electrospinning and injecting device applied to the present invention,
FIG. 2 is a flow chart of a manufacturing process of a liquid treatment chemical filter using a nanofiber web having ion exchange resin particles according to an embodiment of the present invention;
FIGS. 3A to 3C are conceptual sectional views illustrating a process for manufacturing a liquid chemical filter using nanofibrous webs having ion exchange resin particles according to an embodiment of the present invention; FIGS.
FIG. 4 is a conceptual view for explaining a state of a bead ejected from an ejection nozzle according to an embodiment of the present invention,
5 is a view for explaining a state in which ion exchange resin particles are dispersed in a first nanofiber web according to an embodiment of the present invention;
FIG. 6 is a flow chart of a manufacturing process that can be selectively added to a manufacturing process of a liquid processing chemical filter according to an embodiment of the present invention;
7 is a conceptual cross-sectional view illustrating a state in which a support is further formed on a liquid processing chemical filter according to an embodiment of the present invention.

In the present invention, a first spinning solution is prepared by mixing a polymer material and a solvent, a first spinning solution is first electrospun to form a first multi-layered nanofiber web, and ion exchange resin particles and a solvent are mixed to prepare a solution The ion exchange resin particles are dispersed in the first multi-layered nanofiber web by performing electrospray on the dispersing solution, the second spinning solution is prepared by mixing the polymer substance and the solvent, and the second spinning solution is mixed with the second electric spinning solution And a second multi-layered nanofiber web is formed on the first multi-layered nanofiber web in which the ion exchange resin particles are dispersed to prepare a liquid treatment chemical filter using the nanofiber web in which the ion exchange resin particles are dispersed.

The sprayed ion exchange resin particles are dispersed in the first multi-layered nanofiber web, but the bonding force between the ion exchange resin particles and the first multi-layered nanofiber web can be reduced by the external force, and the second multi- Thereby making it possible to prevent the particles from being separated from the first multi-layered nanofiber web.

Here, the first and second multi-layer nanofiber webs are formed by laminating nanofibers of a spun polymer material. The nanofiber web is formed with microporous passages. When the micropore passes through the microporous pores, Thereby filtering the fine nanoparticles of the nanoparticles. That is, surface filtration consisting of the surface layer and deep filtration consisting of the inner layer are made of nanofibers of polymeric material. The ion exchange resin particles filter specific ions of the chemical substance contained in the treatment water.

In the present invention, after forming the first multi-layered nanofiber web and the second multi-layered nanofiber web, a liquid treatment chemical filter can be manufactured after the nonwoven fabric or the base paper is laminated as a support.

The nonwoven fabric usable herein may be any of a melt-blown nonwoven fabric, a spun bond nonwoven fabric, a thermal bond nonwoven fabric, a chemical bond nonwoven fabric, and a wet-laid nonwoven fabric as a support . The nonwoven fabric may have a fiber diameter of 40-50 mu m and a pore size of 100 mu m or more.

The polymeric material used in the present invention is capable of electrospinning, for example, a hydrophilic polymer and a hydrophobic polymer, and one or more of these polymers may be used in combination.

The polymer material usable in the present invention is not particularly limited as long as it is soluble in an organic solvent for electrospinning and is capable of forming nanofibers by electrospinning. For example, polyvinylidene fluoride (PVdF), poly (vinylidene fluoride-co-hexafluoropropylene), perfluoropolymers, polyvinyl chloride, polyvinylidene chloride or copolymers thereof, polyethylene glycol di Polyoxyethylene-polyoxypropylene oxide, polyethylene glycol derivatives including alkyl ethers and polyethylene glycol dialkyl esters, polyoxides including poly (oxymethylene-oligo-oxyethylene), polyethylene oxide and polypropylene oxide, polyvinyl acetate, poly (vinylpyrrolidone- Vinyl acetate), polystyrene and polystyrene acrylonitrile copolymers, polyacrylonitrile (PAN), polyacrylonitrile copolymers including polyacrylonitrile methyl methacrylate copolymers, polymethyl methacrylate, polymethyl methacrylate Acrylate copolymer or a mixture thereof.

Examples of usable polymer materials include polyamide, polyimide, polyamideimide, poly (meta-phenylene isophthalamide), polysulfone, polyetherketone, polyetherimide, polyethylene terephthalate, , Aromatic polyesters such as polyethylene naphthalate, polyphosphazenes such as polytetrafluoroethylene, polydiphenoxaphospazene, poly {bis [2- (2-methoxyethoxy) Polyurethane copolymers including polyether urethanes, cellulose acetate, cellulose acetate butyrate, and cellulose acetate propionate.

Of the above polymer materials, PAN, polyvinylidene fluoride (PVdF), polyester sulfone (PES) and polystyrene (PS) may be used alone or polyvinylidene fluoride PVdF) and polyacrylonitrile (PAN), PVDF, PES, PVdF and thermoplastic polyurethane (TPU) may be mixed and used.

Accordingly, the polymer usable in the present invention is not particularly limited to thermosetting and thermosetting polymers capable of electrospinning.

For the solvent to be mixed with the polymer substance for preparing the spinning solution, a mono-component solvent such as dimethylformamide (DMF) may be used. In the case of using the two-component solvent, the boiling point it is preferable to use a two-component solvent in which the higher and the lower one are mixed.

In the two-component mixed solvent according to the present invention, the high boiling point solvent and the low boiling point solvent are preferably mixed in a weight ratio of 7: 3 to 9: 1.

In the present invention, the ion exchange resin may be a cation exchange resin or an anion exchange resin.

That is, in the present invention, the ion-exchange resin particles may be defined as having an ion-exchangeable functional group on the inner surface, and may include a cation-exchange resin, anion-exchange resin, and positive-tone exchange resin depending on the ion to be exchanged .

More specifically, in the present invention, PSDVB, which is a porous organic polymer having an ion exchange capacity or a copolymer of polystyrene and divinylbenzene, is made into particles, and the particles and a solvent are mixed to prepare a liquid dispersion.

1 is a schematic view of an electrospinning and injecting device applied to the present invention.

The electrospinning and spraying method applied to the present invention is characterized in that high voltage electrostatic force is applied between the spinning nozzles 41 and 43 through which the first and second spinning solutions are radiated and between the spraying nozzle 42 and the collector 6 through which the spinning solution is sprayed The first multi-layered nanofiber web, the ion exchange resin particles, and the second multi-layered nanofiber web are successively firstly radiated, sprayed, and secondly radiated to the collector 6 to form a first multi- It is possible to disperse the ion exchange resin particles.

The injected nanofibers 5 and the injected beads are injected into the collector 6 by spraying the air 4a during the spinning process in the spinning nozzles 41 and 43 and the spinning process in the spinning nozzle 42. [ So that it can be prevented from being blown.

1, the electrospinning and injecting apparatus of the present invention includes a stirrer 2 that uses a mixing motor 2a as a driving source and is connected to spinning nozzles 41 and 43 for supplying a stirred spinning solution And an agitator 2 which uses a mixing motor 2a as a driving source similar to the first agitating tank 1 and has an injection nozzle 42 for supplying a stirred injection solution And the spinning nozzles 41 and 43 and the spraying nozzle 42 are connected to the high voltage generator.

Here, assuming that the first and second multi-layered nanofiber webs are formed of the nanofibers radiated from the spinning solution composed of the same components (the polymer substance and the solvent), two spinning nozzles 41 , 43). When the components of the spinning solution for forming the first and second multi-layered nanofiber webs are different, the spinning solution of the other component is put in the two stirring tanks, and the spinning nozzle ' 41 ', and a spinning nozzle' 43 'is connected to the other stirring tank.

The spinning nozzle 40 may be disposed on a conveyor-type grounded collector 6 moving at a constant speed and may be arranged in a plurality of rows spaced along the traveling direction of the collector 6, Of the spinneret.

The first stirring tank 1 is connected to the first and second spinning nozzles 41 and 43 via a metering pump and a transfer pipe 3 which are not shown and the second stirring tank 1a is also connected to a metering pump (Not shown) and a spray nozzle (not shown).

The polymer spinning solution sequentially discharged from the spinning nozzles 41 and 43 is discharged to the nanofibers 5 while passing through the spinning nozzles 41 and 43 charged by the high voltage generator, The nanofibers are sequentially laminated on the grounded collector 6 to form a porous nanofiber web.

When the sprayed bead is injected into the first nanofiber web and the sprayed bead reaches the first nanofiber web, most of the solvent is volatilized so that the first nanofiber The ion exchange resin particles are dispersed and settled on the web.

In the present invention, air is injected from the outer periphery of the spinneret when electrospinning is performed by an electrospinning method in which air 4a is sprayed for each spinneret 41, 43, By taking the role of collecting and integrating, a more rigid separation membrane can be produced.

When a plurality of multi-hole radiation packs are used for mass production, mutual interference occurs and the fibers are blown away and are not collected. As a result, the nanofiber web obtained becomes too bulky and causes radiation trouble .

Therefore, in the present invention, air can be jetted around the spinning nozzles 41 and 43, minimizing radiation troubles that may occur when the fibers fly.

In the same manner, the spray nozzle 42 is also air-jetted to help the first multi-layered nanofiber web 7 to settle and prevent the beads of the spraying solution from flying.

A plurality of air injection nozzles (not shown) are provided on the outer circumference of the spinning nozzles 41 and 43 and the injection nozzles 42 used in the present invention. The fibers and the beads of the spray liquid sprayed from the spray nozzle 42 can be guided and integrated. The air pressure of the air injection is set in the range of 0.1 to 0.6 MPa. In this case, when the air pressure is less than 0.1 MPa, it can not contribute to the collection / accumulation. When the air pressure exceeds 0.6 MPa, the cone of the spinning nozzle is hardened, and the needle is closed to cause radiation trouble.

Although the electrospinning apparatus shown in Fig. 1 exemplifies formation of the nanofiber web 7 laminated in two layers by two spinning nozzles 41 and 43, when the spinning liquid is sprayed from the spinning nozzle 42 Each of the spinning nozzles 41 in the previous process and the spinning nozzles 43 in the post-process after being sprayed is formed in a plurality of nozzles, 1 multi-layered nanofiber web and the second multi-layered nanofiber web of the (post) process after the spraying liquid is sprayed from the spraying nozzle 42 into a multi-hole spinning pack having a plurality of spinning nozzles arranged in a plurality of rows and a plurality of rows, Layered nanofiber web made of ultra-thin film for each layer.

A nanofiber web 7 laminated in two layers in which ion exchange resin particles are dispersed outside the nanofibers by electrospinning and electrospinning is formed, and then a calender Ring process can be selectively performed. In the calendering step, a heating press roller (not shown) may be used. In this case, if the lamination temperature is too low, the web becomes too bulky and not rigid, and if it is too high, the web melts and the pores become clogged.

In addition, since the nanofiber web having a multi-layer structure is required to be thermocompression-bonded at a temperature at which the solvent remaining in the web forming the outer surface layer can be completely volatilized, the structure difference of the web There is a difference in degree of filtration, so that surface filtration on the surface layers on both sides and deep filtration on the inner layer are performed.

FIG. 2 is a flow chart of a process for manufacturing a liquid treatment chemical filter using a nanofiber web having ion exchange resin particles according to an embodiment of the present invention. FIGS. 3A to 3C are cross- FIG. 3 is a conceptual cross-sectional view illustrating a manufacturing process of a liquid treatment chemical filter using a nanofibrous web having a hydrophilic surface.

Preparing a first spinning solution by mixing the polymer material and a solvent, first spinning the first spinning solution to form a first multi-layered nanofiber web, mixing the ion exchange resin particles and the solvent to prepare a solution for dispersion, Ion-exchange resin particles are dispersed in the first multi-layered nanofiber web by performing electrospinning, the second spinning solution is prepared by mixing the polymer material and the solvent, and the second spinning solution is electrospun into the second spinning solution, A second multi-layer nanofiber web is formed on the dispersed first multi-layer nanofiber web to prepare a liquid-treated chemical filter using a nanofiber web in which the ion-exchange resin particles are dispersed.

Referring to FIG. 2, first, a first spinning solution is prepared by mixing a polymer material and a solvent, and a first spinning solution is electrospun to form a first multi-layered nanofiber web (S100). Thereafter, the ion exchange resin particles and the solvent are mixed to prepare an aqueous solution, and the ion exchange resin particles are dispersed in the first multi-layered nanofiber web by performing electrospray (S110). Next, the second spinning solution is prepared by mixing the polymer material and the solvent, and the second spinning solution is second electrospun to form a second multi-layered nanofiber web on the first multi-layered nanofiber web in which the ion exchange resin particles are dispersed (S120). A series of processes are performed to produce a liquid chemical filter using a nanofiber web in which ion exchange resin particles are dispersed.

In this case, when the first spinning solution and the second spinning solution component are the same, the polymer material and the solvent are mixed and put in the stirring tank 1 of FIG. 1 for electrospinning and sprayed from the spraying nozzle 42 The spinning solution of the stirring tank 1 is supplied to the spinneret 41 of the previous process before the spinning solution is sprayed and to the spinning nozzle 43 of the spinning process after the spinning process, When the components of the spinning solution are different, the first spinning solution is put in one stirring tank, the second spinning solution is put in the other stirring tank, and the spinning solution is sprayed to the spinning nozzle 41 So that the first spinning solution is supplied and the second spinning solution is supplied to the spinning nozzle 43 of the (post) spinning process after the spinning solution is injected.

In addition, the present invention is not limited to the air-electric spinning and air-electric spraying shown in the drawings, but it can be applied to any spinning process using electric discharge, electrospinning, air-electrospinning (AES), centrifugal electrospinning, flash-electrospinning, and the like. Can be applied.

3A to 3C, a first spinning solution is electrospun from a spinning nozzle 41 to form a first nanofiber web 100 made of nanofibers 110 (FIG. 3A), and a spray nozzle 42 3B). Herein, in the injection nozzle 42, the liquid fraction is injected into a bead (not shown), and the liquid is injected into the first nanofiber web 100 310), most of the solvent is volatilized, and only the ion exchange resin particles 300 are deposited on the first nanofiber web 100. Thereafter, the second spinning solution is electrospun by the spinning nozzle 43 to laminate the second nanofiber web 200 made of the nanofibers 210 in the first nanofiber web 100 (FIG. 3C)

In the present invention, the thickness of the first nanofibrous web 100 and the thickness of the second nanofibrous web 200 may be designed differently in order to impart various filtering functions of the liquid chemical filter, The diameter of the nanofibers 110 of the second nanofibrous web 200 and the diameter of the nanofibers 210 of the second nanofibrous web 200 may be the same or different.

For example, if the diameter of the nanofibers 110 of the first nanofiber web 100 is designed to be larger than the diameter of the nanofibers 210 of the second nanofiber web 200, May be greater than the average pore size of the second nanofibrous web 200. That is, the nanofiber diameter can be a factor that can control the average pore size, and of course, it does not depend on the average pore size alone.

Suppose that the treated water is passed from the first nanofiber web 100 to the second nanofiber web 200 to function as a filter. If the average pore size of the first nanofiber web 100 is relatively greater than the average pore size of the second nanofiber web 200, It is filtered when passing. In the second nanofiber web 200, which is relatively smaller than the pore size, particles of a small-sized substance contained in the treated water are filtered. Thus, the liquid treatment chemical filter using the nanofiber web of the present invention can have a multistage filtration function by taking advantage of the structural characteristics of the nanofiber web. In addition, the present invention provides a chemical filter function for filtering specific ions of a chemical substance contained in treated water by ion exchange resin particles located in a region between the first nanofiber web 100 and the second nanofiber web 200 Can also be performed.

In the present invention, as the diameter of the nanofiber decreases, the average pore and the maximum pore decrease. In addition, as the diameter of the nanofiber decreases, the density increases, so that the basis weight and the average thickness increase, while the air permeability decreases, but the finer pollutants can be filtered and the filtering effect increases.

FIG. 4 is a conceptual view for explaining a state of a bead injected from an injection nozzle according to an embodiment of the present invention. FIG. 5 is a schematic view illustrating a state in which ion- And Fig.

Referring to FIG. 4, the fractionating liquid in which the ion exchange resin particles and the solvent are mixed is injected into the bead state from the injection nozzle, and most of the solvent is volatilized when the injected bead reaches the first nanofiber web. Therefore, the ion exchange resin particles are segregated and dispersed in various positions of the first nanofiber web in a dispersed state.

The beads 310 injected from the injection nozzle contain most of the ion exchange resin particles 300 in a state in which the solvent surrounds the ion exchange resin particles 300. (Of course, the ion exchange resin particles 300 are embedded in the beads 310.) The diameter of the beads 310 is small and the size of the beads 310 initially sprayed from the spray nozzles is the largest. . Upon reaching the first nanofiber web, most of the solvent is volatilized and the ion exchange resin particles 300 are deposited and distributed at various locations on the first nanofiber web. It can be seen that the solvent is volatilized toward the first nanofiber web direction A with respect to the injection nozzle so that the size of the beads 310 injected from the injection nozzle becomes smaller.

Referring to FIG. 5, the first nanofibrous web has a plurality of nanofibers 110 arranged in a bundled manner, and microscopic pores 111 are irregularly formed in the three-dimensional shape between the nanofibers 110. At this time, the ion exchange resin particles 300 are seated at various positions such as the fine pores 111 between the nanofibers and the nanofibers of the first nanofiber web, the top surface of the nanofibers, and the side surfaces, and the first nanofiber web is randomly ). 5 is a view for explaining how the ion exchange resin particles are dispersed in the first nanofiber web, and the size of the micropores 111 between the nanofibers 110 is finer, The relationship between the diameter of the nanofibers 110 and the size of the ion exchange resin particles 300 is not limited to that shown in Fig.

In the present invention, the ion exchange resin particles 300 are randomly dispersed in the first nanofiber web. In the present invention, the ion exchange resin particles 300 are placed in the first nanofiber web, When the chemical filter is implemented, the ion exchange resin particles 300 are moved by an external force and are likely to be concentrated in a local region. In this case, in the region where the ion exchange resin particles 300 are not distributed, the treated water that has not been subjected to the chemical filtering passes as it is, and the chemical filtering efficiency is lowered.

Accordingly, in order to minimize movement of the sprayed ion exchange resin particles 300, a locking agent for fixing the initial position where the ion exchange resin particles 300 injected into the first nanofibrous web are seated 2 < / RTI > nanofiber web to the first nanofiber web.

Thus, in the liquid treatment chemical filter of the present invention, surface filtration is performed at the surface layer and depth filtration is performed at the inner layer by the laminated structural features of the first and second multi-layered nanofiber webs. In addition, the ion-exchange resin particles 300 dispersed outside the nanofibers 110 in the laminated structure of the first and second multi-layered nanofiber webs can chemically filter specific ions of chemical substances contained in the treated water .

FIG. 6 is a flow chart of a manufacturing process that can be selectively added to the manufacturing process of the liquid processing chemical filter according to the embodiment of the present invention, and FIG. 7 is a cross- Is a conceptual cross-sectional view showing the state.

The first multilayer nanofiber web in the manufacturing process of FIG. 1; Ion exchange resin particles dispersed in the first multi-layer nanofiber web and positioned outside the nanofibers; Layered nanofiber web composed of a second multi-layered nanofiber web laminated on the first multi-layered nanofiber web and a second multi-layered nanofiber web on the surface of the first multi-layered nanofiber web to prevent movement of the ion- 6 can be selectively performed.

Referring to FIG. 6, the lamination structure of the first and second multi-layered nanofiber webs is subjected to primary calendering (S200), and the remaining solvent and moisture remaining on the surface of the porous web are controlled to form first and second multi- And dried to control the strength and porosity of the laminated structure of the second multi-layered nanofiber web (S210). Here, the primary calendering is to remove the solvent and moisture and to squeeze the laminated structure of the first and second multi-layered nanofiber webs. When the drying is completed, secondary calendering is performed to realize smaller pores and increase the strength (S220). Next, a nonwoven fabric is added to both sides of the laminated structure of the first and second multi-layered nanofiber webs subjected to the second calendering to form a composite material, and then bending is performed (S230). Then, sealing and casing assembly are performed on the folded composite filter media (S240).

Here, when the secondary calendering is completed, the support body can be joined. At this time, the support may be laminated on each of the upper and lower portions of the laminated structure of the multilayer first and second multilayer nanofiber webs, or may be laminated only on either the upper portion or the lower portion of the laminated structure of the first and second multilayer nanofiber webs . For example, FIG. 7 shows that the support 500 is joined to only the lower portion of the laminated structure of the first and second multi-layer nanofiber webs 100 and 200. The support 500 may be a nonwoven fabric or an imitation.

After such a series of processes, a plurality of laminated structures of the first and second multi-layered nanofiber webs in which the nonwoven fabric is laminated can be laminated to form a flat-plate liquid-treated chemical filter, and the first and second multi- The laminated structure of the nanofiber web can be rolled to realize a roll type liquid processing chemical filter.

The embodiments of the present invention described above are not defined as a filter material of a liquid treatment chemical filter but are defined as a liquid treatment chemical filter of an upper concept and are further described as a modularization process selected from various modularization processes, The modularization process is not described in detail.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

1,1a: stirring tank 5: nanofiber
6: collector 41, 43: spinning nozzle
42: injection nozzle 100, 200: nanofiber web
110, 210: Nano fiber 300: ion exchange resin particle

Claims (15)

A first multi-layer nanofiber web;
An ion exchange resin particle dispersed in the first multi-layer nanofiber web and positioned outside the nanofibers; And
And a second multi-layered nanofiber web laminated on the first multi-layered nanofiber web to prevent movement of the ion-exchange resin particles. A liquid treatment chemical filter using a nanofiber web having ion exchange resin particles . The ion exchange resin according to claim 1, wherein a support is formed on either one of the first multi-layered nanofiber web, the second multi-layered nanofiber web, and the first and second multi-layered nanofiber webs. Liquid - processing chemical filter using nanofiber web with particles. The liquid treatment chemical filter according to claim 1, wherein the ion exchange resin particles are cation exchange resin particles or anion exchange resin particles. The ion exchange resin particle according to claim 1, wherein the ion exchange resin particle is a particle of a porous organic polymer having ion exchange ability or a copolymer of polystyrene and divinylbenzene Liquid treatment chemical filter using nanofiber web. The liquid treatment chemical filter according to claim 1, wherein the thickness of the first nanofiber web and the thickness of the second nanofiber web are different. The nanofiber web according to claim 1, wherein the nanofiber diameter of the first nanofiber web and the nanofiber diameter of the second nanofiber web are the same or different from each other. filter. The method according to claim 1, wherein the first and second nanofiber webs are subjected to surface filtration and deep filtration of treated water, and specific ions of a chemical substance contained in the treated water are filtered through the ion exchange resin particles Liquid treatment chemical filter using nanofiber web with ion exchange resin particles. The liquid treatment chemical filter according to claim 1, wherein the average pore size of the first nanofiber web is larger than the average pore size of the second nanofiber web. The liquid treatment chemical filter according to claim 2, wherein the support is a non-woven fabric or an imitation. The liquid treatment chemical filter according to claim 2, wherein the liquid treatment chemical filter comprises a flat plate structure in which a plurality of the first and second nanofiber webs with the support are laminated, or the first and second nanofiber webs Characterized in that the nanofibrous web has a roll-type structure. Preparing a first spinning solution by mixing the polymer material and a solvent;
Forming a first multilayer nanofiber web by first electrospinning the first spinning solution;
Mixing the ion exchange resin particles with a solvent to prepare a solution for fractionation;
Dispersing the ion exchange resin particles in the first multi-layered nanofiber web by electro-spraying the dispersion solution;
Mixing a polymer material and a solvent to prepare a second spinning solution; And
And a step of secondly spinning the second spinning solution to form a second multi-layered nanofiber web on the first multi-layered nanofiber web in which the ion exchange resin particles are dispersed. Method of manufacturing a treated chemical filter. 12. The ion exchange resin particle according to claim 11, wherein air is sprayed to prevent the emitted nanofibers and injected beads from being blown out during the first and second electrospinning and the electrospinning, A method of manufacturing a liquid treatment chemical filter using the nanofiber web. 12. The method of claim 11, wherein the size of the beads adjacent to the first multi-layer nanofiber web is smaller than the size of the beads originally sprayed with electrons. Gt; 12. The nanofiber web according to claim 11, wherein the nanofiber diameter of the first nanofiber web and the nanofiber diameter of the second nanofiber web are the same or different from each other. / RTI > 12. The method of claim 11, further comprising the step of calendering the first and second nanofiber webs by thermocompression after forming the second nanofiber webs. A method of manufacturing a liquid treatment chemical filter using the nanofiber web.

Images