KR20110095753A - Nano-fiber for self-sealing and method for manufacturing the same and composite material using the same and method for manufacturing the same - Google Patents

Abstract

PURPOSE: Self-welding type nanofiber and a method for manufacturing the same, a nanofiber composite, and a method for manufacturing the composite are provided to implement the self-welding process of nanofiber with the low welding point by thermally compressing the nanofiber containing polymer with different welding points. CONSTITUTION: Self-welding nanofiber includes nanofiber based on polymeric components with the low welding point and nanofiber based on polymeric components with the high welding point. At least part of the nanofiber based on polymeric components with the low welding point is welded to implement a self-welding process. A method for manufacturing the self-welding nanofiber includes the following: Polymeric components with the low welding point and polymeric components with the high welding point are dissolved in a solvent to obtain a spinning solution(20a, 20b). The spinning solution is spun to form nanofiber web(40a). At least part of the polymeric components with the low welding point is welded in the nanofiber web through a thermal compressing process to obtain the self-welding nanofiber.

Description

Nano-Fiber for Self-sealing and Method for Manufacturing the Same and Composite Material Using the same and Method for Manufacturing the Same}

The present invention relates to a nanofiber and a nanofiber composite material using the same, wherein the nanofibers obtained by electrospinning polymers having different melting points are subjected to a thermocompression process to melt the nanofibers of a low melting point polymer component and thereby self-fusion. And it relates to a manufacturing method, and a nanofiber composite using the same and a manufacturing method thereof.

General-purpose synthetic fibers are obtained by extruding a polymer melt or solution through a nozzle by melt spinning or solution spinning, followed by stretching, solidification, or solidification to a diameter of several tens to hundreds of micrometers. It is made of fibers.

Filament fibers of fine denier fibers are manufactured by direct spinning or composite spinning, and in the case of staple fibers, melt-blown spinning, jet spinning, and centrifugal spinning It is common to manufacture by spinning, fibrillation, flash spinning, electro-spinning and the like.

However, the most effective technique for the production of nanofibers, which reduces the diameter of the fibers to less than 1 μm, is electrospinning. Electrospinning is a three-dimensional lamination simultaneously with spinning by an electric field formed by applying a high voltage to the polymer melt. It is a technique of obtaining a nanofiber of a structure.

The composite nanofibers produced by such a manufacturing process were able to manufacture nanofibers having a nano-sized diameter by adjusting the thickness of the fibers from hundreds to thousands of times thinner than conventional general synthetic fibers. It does not peel off or scratch (scratch) occurs, there is a disadvantage that mechanical properties such as strength is significantly lower than the conventional material.

Therefore, in order to overcome these drawbacks, many nanofibers are required to overcome physical property limitations through complex processes such as lamination or ultrasonic bonding, hot melt, calendering, etc. as base materials such as textile paper, nonwoven fabric, foam, paper, and mesh. There was an attempt.

However, lamination, ultrasonic bonding, and hot-melt bonding, which are secondary processes such as bonding, go through a process of applying an adhesive, which prevents the pores of nanofibers from showing proper moisture permeability or breathability. There are secondary problems such as environmental load.

In addition, when the amount of the adhesive is applied, due to the structural characteristics of the laminated nanofibers, there is a disadvantage in that the peeling is performed at a portion where the adhesive is not applied, or when water pressure is applied, the voids are opened and the water resistance is lowered.

KR10-0871440B

Accordingly, an object of the present invention is a self-fusion type with low environmental load because the nanofibers obtained by blending the polymers having different melting points by electrospinning are melted and melted with low melting point nanofibers without using an adhesive in a thermocompression bonding process. Provided are nanofibers and a method of manufacturing the same.

Another object of the present invention is to electrospun polymers having different melting points, so that the low melting point nanofibers are melted in the thermocompression process to improve mechanical properties and at the same time, the self-sealing nanofibers can be manufactured in various sizes. Provide a method.

Still another object of the present invention is to fabricate a nanofiber composite material in which the low melting point nanofibers are melted in a thermocompression process when the self-sealing nanofibers and the base material are combined to uniformly bond the base material and the nanofibers to the support, and their fabrication. Provide a method.

According to an aspect of the present invention for achieving the above object, a nanofiber of a low melting point polymer component; And nanofibers of a high melting point polymer component, wherein the nanofibers of the low melting point polymer component are at least partially melted to provide self-fusion.

According to another aspect of the invention, the step of preparing a spinning solution by dissolving a low melting point polymer material and a high melting point polymer material in a solvent; Spinning the spinning solution to form a nanofiber web; And thermocompressing the nanofibers of the low melting point polymer component into the nanofiber web to at least partially melt the nanofiber web to produce self-fused nanofibers.

According to another aspect of the invention, the nanofiber of the low melting polymer component; Nanofibers having a high melting point polymer component; And at least one base material, wherein the nanofibers of the low melting polymer component are at least partially melted and self-fused.

According to another aspect of the invention, the step of preparing a spinning solution by dissolving a low melting point polymer material and a high melting point polymer material in a solvent; Spinning the spinning solution to form a nanofiber web; And thermocompressing the nanofibers of the low melting polymer component together with at least one base material to at least partially melt the nanofibers of the low melting polymer component to produce self-bonded nanofibers.

The low-melting and high-melting polymers are low-polymer polyurethane (polyurethane), high-polymer polyurethane, PS (polystylene), PVA (polyvinylalchol), PMMA (polymethyl methacrylate), polylactic acid (PLA: polylactic acid), PEO (polyethyleneoxide) , PVAc (polyvinylacetate), PAA (polyacrylic acid), polycaprolactone (PCL: polycaprolactone), PAN (polyacrylonitrile), PVP (polyvinylpyrrolidone), PVC (polyvinylchloride), nylon (Nylon), PC (polycarbonate), PEI (polyetherimide) , PVdF (polyvinylidene fluoride), PES (polyesthersulphone) is characterized in that the manufacturing by selecting a polymer having a different melting point.

The solvent is DMAc (dimethyl acetamide), DMF (N, N-dimethylformamide), NMP (N-methyl-2-pyrrolidinone), DMSO (dimethyl sulfoxide), THF (tetra-hydrofuran), EC (ethylene carbonate), DEC (DEC) diethyl carbonate, dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), propylene carbonate (PC), water, acetic acid, formic acid, chloroform, chloroform, dichloromethane and acetone It is characterized in that any one or more selected from the group consisting of.

The radiation is characterized in that any one or more selected from electrospinning, electrospray, electrobrown spinning, centrifugal electrospinning, flash-electrospinning.

The base material is any one or more selected from woven paper, nonwoven fabric, foam, paper, and mesh.

The low melting point polymer has a melting point of 30 to 170 ° C, and the high melting point polymer has a melting point of 80 to 250 ° C.

The thermocompression is characterized in that the calendar (calendering).

The spinning solution may be prepared by dissolving a low melting point polymer material and a high melting point polymer material in the same solvent.

In the preparing of the spinning solution, the low melting point polymer material and the high melting point polymer material are dissolved in different solvents to prepare first and second spinning solutions, respectively.

The base material is composed of a nanofiber web and a double layer up and down.

The nanofiber web is characterized in that it is a triple layer (3 layer) interposed between the base material.

In the present invention, since the low-melting-point nanofibers are melted and self-fused without using an adhesive in the thermocompression bonding process, the nanofibers obtained by electrospinning polymers having different melting points can produce environmentally friendly nanofibers.

In the present invention, the low melting point nanofibers are melted in the thermocompression process by electrospinning polymers having different melting points to improve mechanical properties, and the pore size can be adjusted in various ways, thereby making it easy to manufacture moisture-permeable, waterproof and heat-resistant lightweight materials. Do.

In the present invention, when the self-fused nanofibers and the base material are compounded, the low melting point nanofibers are melted so that the base material and the nanofibers can be uniformly bonded to secure moisture permeability and water repellency at the same time. It can be used as a fiber material.

Figure 1a is a schematic diagram for schematically illustrating a process for producing a self-fusion nanofiber according to the present invention,
Figure 1b is a schematic diagram for schematically illustrating a process for producing a self-fusion nanofiber composite according to the present invention,
2a and 2b is a scanning electron micrograph showing a nanofiber web prepared by Example 1 of the present invention,
3a and 3b are scanning electron micrographs showing the nanofiber web prepared by Example 2 of the present invention,
4 is a scanning electron micrograph showing a nanofiber web prepared by Example 3 of the present invention,
5a and 5b are scanning electron micrographs of the base fabric,
6 is a scanning electron micrograph showing a cross section of the nanofiber composite prepared by Example 4 of the present invention,
7A to 7C are scanning electron micrographs showing nanofibers fused at 50 ° C. by Example 5 of the present invention,
8A to 8C are scanning electron micrographs showing nanofibers fused at 70 ° C. according to Example 5 of the present invention;
9A to 9C are scanning electron micrographs showing nanofibers fused at 100 ° C. by Example 5 of the present invention.

First, according to the present invention, the spinning solution in which the low melting point and high melting point polymers having different melting points are dissolved in the same solvent is electrospun (hereinafter also referred to as 'blend spinning'), and the formed nanofiber web is subjected to a thermocompression bonding process. By performing calendering, nanofibers of low melting point polymer components are melted to produce self-fused nanofibers.

In the present invention, the low melting point and the high melting point polymers having different melting points are prepared using different solvents, respectively, and the two spinning solutions are electrospun using different spinning nozzles. Cross-spinning), and then randomly complexed to form a nanofiber web, and a thermocompression process, for example, calendering, melts the nanofibers of a low melting polymer component to produce self-fused nanofibers. can do.

When the self-fused nanofibers of the present invention are subjected to heat treatment such as calendering of the nanofiber web formed by electrospinning using a low melting point and a high melting point polymer, the nanofibers of the low melting point polymer component are melted to form nanofibers and nanofibers. By acting as an adhesive to the liver, the use of a separate adhesive is unnecessary.

Meanwhile, in the present invention, when the nanofiber web formed by electrospinning using a low melting point and a high melting point polymer and a base material are calendered together, the nanofibers of the low melting polymer component forming the nanofiber web are melted and It is also possible to obtain a nanofiber composite material in which the nanofiber web and the base material are bonded by fusion and acting as an adhesive.

The low melting point polymer material usable in the present invention is a polymer material having a melting point of 30 to 170 ° C., for example, a low polymer polyurethane, a polystylene, a polyvinylalchol (PVA), a polymethyl methacrylate (PMMA), a poly Polylactic acid (PLA), polyethyleneoxide (PEO), polyvinylacetate (PVAc), polyacrylic acid (PAA), polycaprolactone (PCL), polyvinyl chloride fluoride (PVD), polyvinyl chloride (PVP), polyvinyl pyrrolidone (PVP) Polymers such as (polyacrylonitrile) and PC (polycarbonate) may be used alone or in combination, but are not limited to the above materials, and any polymer material having a low melting point capable of forming nanofibers by electrospinning is not particularly limited.

The high melting point polymer material usable in the present invention is a polymer material having a melting point of 80-250 ° C., for example, a high polymer polyurethane, polyacrylonitrile (PAN), polyetherimide (PEI), polyesthersulphone (PES), PMMA, PVdF, PVC Fiber molding polymer such as (polyvinylchloride) may be configured alone or in combination, but is not limited to the above material, and there is no particular limitation as long as it is a polymer material having a high melting point capable of forming nanofibers by electrospinning.

In the present invention, the low melting point polymer and the high melting point polymer are dissolved in the same solvent, and then blended to obtain a nanofiber web structure, or each polymer is dissolved in a different solvent to cross-spin through each spinning nozzle to form a low melting point polymer. It is also possible to obtain a nanofiber web structure in which nanofibers and high melting polymer nanofibers are randomly stacked.

In addition, in the present invention, the spinning method includes electrospinning, electro-spray, electro-brown spinning, centrifugal electro-spinning, and flash electrospinning. Various methods of radiation such as -electro-spinning can be adopted.

The solvent is DMAc (dimethyl acetamide), DMF (N, N-dimethylformamide), NMP (N-methyl-2-pyrrolidinone), DMSO (dimethyl sulfoxide), THF (tetra-hydrofuran), EC (ethylene carbonate), DEC (DEC) diethyl carbonate, dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), propylene carbonate (PC), water, acetic acid, formic acid, chloroform, chloroform, dichloromethane and acetone It is characterized in that any one or more selected from the group consisting of.

The base material material is any one or more selected from the group consisting of woven paper, nonwoven fabric, foam, paper, mesh, and the like.

The calendering is preferably performed at 30-170 ° C., which is a temperature range in which at least a part of polymer nanofiber webs having different electrospun melting points are melted, and more specifically, the low melting polymer and the high melting point. It is preferable to perform the electrospinning of the polymer as appropriate so that the low melting point polymer component is melted and self-fused between the base material and the nanofibers.

The process for producing a self-fusion nanofiber by implementing the present invention will be described with reference to FIGS. 1A and 1B.

Figure 1a is a schematic diagram for schematically illustrating a process for producing a self-fusion nanofibers according to an embodiment of the present invention. Referring to FIG. 1A, a spinning nozzle 10 for spinning a spinning solution 20 in which a low melting point polymer material and a high melting point polymer material are dissolved in the same solvent, and a spinning solution 20 spinning from the spinning nozzle 10. The electrospinning (blend spinning) on the current collector plate 30 to obtain a nanofiber web (40).

The nanofiber web 40 thus obtained is passed through the hot roll 50 and the cool roll 60 in order to perform calendering to obtain self-fused nanofibers 70.

On the other hand, Figure 1b is a schematic diagram for schematically explaining a process for producing a self-fusion nanofiber composite. Referring to FIG. 1B, each of the spinning nozzles 10a and 10b for spinning the two spinning solutions 20a and 20b in which the low melting point polymer material and the high melting point polymer material are dissolved in each solvent, and the spinning nozzles 10a and 10b, respectively. The spinning solution 20a, 20b radiated from 10b) is electrospun (cross-spinning) on the current collector plate 30 to obtain a nanofiber web 40a. It is apparent that the nanofiber web 40a can also be obtained by the blend spinning of FIG. 1A described above.

The nanofiber web 40a thus obtained is passed through the hot roll 50 and the cool roll 60 together with the base material 90 in order to perform calendaring. Composite 80 is obtained.

On the other hand, if the nanofiber web 40a without the base material 90 and the above-described calendering of Figure 1a, it is also apparent that the self-fused nanofibers 70 can be obtained.

1A and 1B described above, each step will be described in more detail below.

A. Preparation of spinning solution containing low melting point polymer and high melting point polymer

A low melting point polymer and a high melting point polymer are dissolved in a spinning concentration using the same solvent to prepare a spinning solution 20. Regarding the content ratio of the low melting point polymer and the high melting point polymer material constituting the spinning solution, the low melting point polymer is in the range of 10 to 90% by weight based on the entire polymer material.

When the ratio of the low melting polymer is less than 10% by weight, the self-melting rate of the nanofibers may be low, and thus peeling or scratching of the final product may occur. After the pressing process, the porosity of the nanofibers is formed in a film shape which is remarkably reduced, so that it is difficult to secure proper breathability.

In addition, in the production of the nanofiber of the present invention, it is preferable to control the morphology of the fiber by preparing the concentration of the spinning solution at 3 to 60% by weight in order to form a fibrous structure. At this time, when the concentration of the spinning solution is less than 3% by weight, it is difficult to form a fibrous shape, and when it exceeds 60% by weight, the viscosity rises, making it difficult to spin.

In addition, in the case of the cross-spinning of Figure 1b, when the phase separation of the spinning solution 20 or the same solvent is not used during the blend spinning of Figure 1a, each of the polymers alone or in mixture of two or more, and dissolved in different solvents electrospinning Each spinning solution 20a, 20b is prepared to be possible.

B. Nanofiber Web Formation

The prepared spinning solution (20, 20a, 20b) is transferred to the spinning nozzle (10, 10a, 10b) using a metering pump, using a high voltage regulator (not shown) spinning nozzle (10, Electrospinning is performed by applying a voltage to 10a and 10b).

At this time, the voltage used is a voltage capable of radiation in the range of 0.5kV ~ 100kV, the current collector 30 can be used by grounding or charging to the (-) pole.

The current collector plate 30 is preferably composed of an electrically conductive metal, release paper, or the like. In the case of the current collector plate, it is preferable to use a suction collector attached to smooth the focusing of the fiber during spinning, and the distance between the radiation nozzle 10 and the current collector plate 30 is adjusted to 5 to 50 cm. It is preferable to use.

The amount of discharge during spinning is discharged by discharging at 0.01 ~ 5cc / hole min per hole using a metering pump, it is preferable to spin in an environment of 10-90% relative humidity in the chamber that can control the temperature and humidity during spinning.

C. Calendering

The blend-spun or cross-spun nanofiber webs (40, 40a) is passed through a temperature-controlled calender roll (50, 60) to melt the nanofibers of the low melting point polymer component to bond the nanofibers to self-fusion nanofibers ( 70) is prepared.

At this time, the temperature of the hot roll 50 is a temperature at which at least a part of the low melting point polymer used may be melted, for example, about 30 to 170 ° C.

In addition, as shown in FIG. 1B, the nanomaterial of the low melting polymer component is melted by simultaneously passing the base material 90 and the nanofiber web 40a during calendering to bond the nanofiber and the base material of the high melting polymer component. To produce a nanofiber composite (80).

Meanwhile, in the above, the base material and the nanofiber web were laminated to prepare a composite material. However, the base material was laminated on the top and bottom of the nanofiber web to be calendered into a triple structure to manufacture the nanofiber composite material.

At this time, the temperature of the hot roll 50 is performed at a temperature range of 30-170 ° C., which is a temperature range in which the nanofibers of the high melting point polymer component and the base material 80 are not melted and only the nanofibers of the low melting point polymer component are melted. It is preferable.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are intended to illustrate the present invention in more detail, and the scope of the present invention is not limited by the following examples, and the following examples are appropriately changed by those skilled in the art within the scope of the present invention. Can be.

(Example 1)

Low melting point polymer with softening temperature of 80-100 ℃, low polymerization polyurethane (wet curing resin) and high melting point polymer with softening temperature of 140 ℃ or higher, high polymerization polyurethane is mixed in a ratio of 50:50 (wt%) and THF ( A spinning solution was prepared by dissolving 15 wt% in a mixed solvent of tetrahydrofuran) and DMAc (N, N-dimethylaceticamide) at a ratio of 50:50 (vol%).

The spinning solution was electrospun (blend spinning) at an applied voltage of 25 kV, a distance of 20 cm between the spinning nozzle and the current collector, and a discharge amount of 0.05 cc / g · hole per minute at 60 ° C. and a relative humidity of 60%. To obtain a nanofiber web.

Scanning electron micrographs of the blend-spun nanofiber webs are shown in FIGS. 2A and 2B, and the fiber diameter distribution was about 500-900 nm, and the average fiber diameter was about 600 nm.

(Example 2)

The low-polymerization polyurethane and the high-polymerization polyurethane used in Example 1 were dissolved in a mixed solvent of THF and DMAc (50:50 vol%) to 20 wt% and 15 wt%, respectively, to prepare respective spinning solutions. .

Two spinning solutions were electrospun (cross-spinning) through the respective spray nozzles to obtain nanofiber webs. At this time, the voltage and the radiation amount used were the same as in Example 1.

3A and 3B show scanning electron micrographs of cross-spun nanofiber webs. As shown in Figures 3a and 3b, the fiber diameter of the nanofibers of the low melting point polymer (low polymerization degree polyurethane) component was about 300-500nm, and the fiber diameter of the nanofibers of the high melting point polymer (high polymerization degree polyurethane) component is about It was 800-1000 nm thicker than the low melting polymer.

(Example 3)

Low-melting polymer, low-polymer polyurethane and high-melting polymer, PAN (polyacrylonitrile) is mixed at a ratio of 50:50 (wt%), respectively, and dissolved in 15% by weight in a mixed solvent of THF and DMAc (30:70 vol%). To prepare a spinning solution.

The spinning solution thus prepared was blended under the same electrospinning conditions as in Example 1 to obtain a nanofiber web.

The scanning electron micrograph of the nanofiber web obtained in this way is shown in FIG. The average diameter of the blended nanofibers was about 300-500 nm, and no phase separation of the spinning solution was observed.

(Example 4)

Nanofiber of low melting point polymer (low degree of polymerization polyurethane) component is melted by passing a calender roll heated at 100 ° C. by using a nanofiber web and a base material electrospun intersected by the second embodiment. Self fusion was allowed between the fibers and the base fabric.

5A and 5B show scanning electron micrographs of the base fabric and FIG. 6 shows scanning electron micrographs showing cross sections of self-fused nanofiber composites.

(Example 5)

The nanofiber web obtained by blend spinning PAN and low melting point polyurethane according to Example 3 was calendered when the calender rolls were heated to 50, 70 and 100 ° C, respectively.

7A to 9C are scanning electron micrographs of self-fused nanofibers at different temperatures. 7A to 7C show that the nanofibers of the low melting point polymer component are not melted when the temperature of the calender roll is 50 ° C. In FIGS. 8A to 8C, the low melting point polymer component is the temperature of the calender roll when the temperature of the calender roll is 70 ° C. Nanofibers begin to melt partially.

9A to 9C show a state in which the nanofibers of the low melting polymer component are sufficiently melted and self-fused when the temperature of the calender roll is 100 ° C. However, even in this case, it can be confirmed that the three-dimensional pore structure is maintained.

From the results of Example 5, when the nanofiber web obtained from the low melting point polymer material and the high melting point polymer material was subjected to a thermocompression process, the nanofibers of the low melting point polymer component began to be partially fused at 100 ° C. Since the nanofibers of the low melting polymer component are sufficiently melted and self-fused, it can be seen that a fiber having a desired function can be manufactured by controlling the pore size of the nanofibers by controlling the thermocompression temperature.

In addition, as in Example 4, when the self-fused nanofibers and the base material are combined, the low melting point nanofibers may be melted to uniformly bond the base material and the nanofibers, thereby ensuring moisture-permeable waterproofing and water repellency. It also suggests that it can be used as a textile material in various fields.

While the present invention has been shown and described with reference to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention, which is common in the art. Many changes and modifications will be possible to those skilled in the art.

The present invention can control the pore structure of the nanofibers to produce the desired material, such as breathable, waterproof, warm, breathable, lightweight, filter material, biomedical, hygroscopic fabric, housing wrap, outdoor clothing, military uniform, It is applicable to various fields such as NBC protective clothing, extreme cold protection clothing, next generation wiper, and functional fabrics.

10,10a, 10b: Spinning nozzle 20,20a, 20b: Spinning solution
30: current collector plate 40, 40a: nanofiber web
50: hot roll 60: cool roll
70: nanofiber 80: nanofiber composite

Claims (19)

Nanofibers having a low melting polymer component; And
Contains nanofibers of high melting point polymer component,
Nanofibers of the low-melting point polymer component is characterized in that at least partially melted and self-fused. The method of claim 1, wherein the low melting polymer
Low-polymer polyurethane, polystylene, polyvinylalchol (PVA), polymethyl methacrylate (PMMA), polylactic acid (PLA), polyethyleneoxide (PEO), polyvinylacetate (PVAc), polyacrylic acid (PAA), poly Caprolactone (PCL: polycaprolactone), polyvinyl chloride fluoride (PVDF), polyvinyl chloride (PVC), polyvinyl pyrrolidone (PVP), polyacrylonitrile (PAN), nanofibers, characterized in that any one or more selected from. The method of claim 1, wherein the high melting point polymer
Any one selected from high polymer polyurethane, polyacrylonitrile (PAN), polyetherimide (PEI), polyesthersulphone (PES), polymethyl methacrylate (PMMA), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), polycarbonate (PC), and nylon (Nylon) Nanofibers, characterized in that one or more. The nanofiber of claim 1, wherein the low melting point polymer has a melting point of 30 to 170 ° C and the high melting point polymer has a melting point of 80 to 250 ° C. Preparing a spinning solution by dissolving a low melting point polymer material and a high melting point polymer material in a solvent;
Spinning the spinning solution to form a nanofiber web; And
And thermocompressing the nanofibers of the low melting polymer component into the nanofiber web to at least partially melt to produce self-fused nanofibers. The method of claim 5, wherein the low melting polymer
Low Polymer Polyurethane, Polystylene, Polyvinylalchol (PVA), Polymethyl methacrylate (PMMA), Polylactic Acid (PLA), Polyethyleneoxide (PEO), Polyvinylacetate (PVAc), Polyacrylic Acid (PAA), Polycapro Lactone (PCL: polycaprolactone), PVdF (poly vinylidene fluoride), PVC (polyvinyl chloride), PVP (polyvinyl pyrrolidone), PAN (polyacrylonitrile), nanofiber manufacturing method characterized in that at least one selected from polycarbonate (PC). The method of claim 5, wherein the high melting point polymer
Any one selected from high polymer polyurethane, polyacrylonitrile (PAN), polyetherimide (PEI), polyesthersulphone (PES), polymethyl methacrylate (PMMA), poly vinylidenefluoride (PVDF), polyvinylchloride (PVC), polycarbonate (PC), and nylon (Nylon) Nanofiber manufacturing method, characterized in that above. The method of claim 5, wherein the solvent is dimethyl acetamide (DMA), N, N-dimethylformamide (DMF), N-methyl-2-pyrrolidinone (NMP), dimethyl sulfoxide (DMSO), tetra-hydrofuran (THF), DMAc ( di-methylacetamide (EC), ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), propylene carbonate (PC), water, acetic acid, formic acid, Chloroform (Chloroform), dichloromethane (dichloromethane) and nanofiber manufacturing method, characterized in that any one or more selected from the group consisting of acetone. The method of claim 5, wherein the thermocompression is calendering. The method of claim 5, wherein the low melting point polymer has a melting point of 30 to 170 ° C., and the high melting point polymer has a melting point of 80 to 250 ° C. 6. 6. The method of claim 5, wherein the spinning solution is prepared by dissolving a low melting point polymer material and a high melting point polymer material in the same solvent. 6. The method of claim 5, wherein the preparing of the spinning solution comprises dissolving a low melting point polymer material and a high melting point polymer material in different solvents to prepare first and second spinning solutions, respectively. Nanofibers having a low melting polymer component;
Nanofibers having a high melting point polymer component; And
One or more base materials,
The nanofiber composite material characterized in that the nanofibers of the low melting point polymer component is at least partially melted and self-fused. The nanofiber composite of claim 13, wherein the base material is at least one selected from woven paper, nonwoven fabric, foam, paper, and mesh. The nanofiber composite according to claim 13, wherein the low melting point polymer has a melting point of 30 to 170 ° C. and the high melting point polymer has a melting point of 80 to 250 ° C. 15. Preparing a spinning solution by dissolving a low melting point polymer material and a high melting point polymer material in a solvent;
Spinning the spinning solution to form a nanofiber web; And
And thermocompressing the nanofibers of the low melting polymer component in the nanofiber web with at least one base material to at least partially melt to produce self-fused nanofibers. The method of claim 16, wherein the base material is at least one selected from woven paper, nonwoven fabric, foam, paper, and mesh. The method of claim 16, wherein the base material is a nanofiber web and a double layer structure (up and down). 17. The method of claim 16, wherein the nanofiber web is a triple layer sandwiched between base materials.

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