KR20110101505A - Apparatus and method for nano fiber non-woven using rotating nozzles - Google Patents

Abstract

The present invention provides a method for manufacturing a nanofiber nonwoven fabric produced by concentrating a nanofiber produced by electrospinning a polymer spinning solution in a nozzle unit to a focusing apparatus, wherein the nozzle unit includes a plurality of nozzle modules in which two or more spinning nozzles are formed. The present invention relates to a method and a manufacturing apparatus for a nanofiber nonwoven fabric using a rotating nozzle in which the nozzle module is rotated and electrospun.

Description

Apparatus and method for manufacturing nanofiber nonwoven fabric using a rotating nozzle {APPARATUS AND METHOD FOR NANO FIBER NON-WOVEN USING ROTATING NOZZLES}

The present invention relates to a nanofiber nonwoven fabric manufacturing apparatus using a rotating nozzle, and a manufacturing method of the nonwoven fabric made of nanofibers having excellent uniformity by the manufacturing method thereof and a manufacturing method thereof.

Spinning process of fiber is a process that continuously pushes polymer fluid through a thin hole and converts it into a long thin fiber. Conventional spinning methods are melt spinning, wet spinning, dry spinning, and wet spinning. The solution is extruded through a nozzle with mechanical force, spun and stretched, and then solidified or solidified to produce fibers.

Typical spinning processes include melt spinning and solution spinning (wet spinning, dry spinning). Melt spinning is a form in which a polymer chip is placed in a raw material storage of a spinning machine, melted in a high temperature extruder, extruded fibers through a spinneret, solidified by cold cooling air, and then stretched by a winding unit. On the other hand, solution spinning (wet spinning, dry spinning) is dissolved in the raw material polymer in the solvent in the reservoir, and then passed through a heat exchanger to adjust the molecular weight or viscosity to pass through the spiranenet or pass through a cold coagulation solution (wet Spinning) or rapidly evaporating to hot gas (dry spinning) to be wound around the winding to form fibers.

If manufactured using the existing process as described above, it is possible to manufacture a fiber having a diameter of several tens to several tens of micrometers, and with the current technology, it is possible to manufacture microfiber fibers having a submicron to several micrometers diameter, but only a specific polymer is possible. Manufacturing was only possible through a sophisticated and complex process.

Recently, with the development of nanotechnology, the development of nano-sized nanofibers through electrospinning in the field of textiles and the application of high-tech materials throughout the industries such as electric, electronics, environment, life and medicine using the characteristics of nanofibers Interest is attracting, non-woven fabric composed of nanofibers are widely used for industrial, clothing, medical, etc. Specifically, the application range is expanded as energy materials such as various filter materials, moisture-permeable waterproof clothing materials, drug carriers, secondary batteries Is going.

Electrospinning is a deformation in the electrostatic spraying process in which fine filaments are released from the droplet surface when high tension is applied to the droplets suspended by the capillary ends by the surface tension. Fibers are formed when the polymer solution or melt having sufficient viscosity is applied with electrostatic force It is a radiation technology that applies the phenomenon.

Fiber spinning technology known as electrospinning was already known in the 1930s, but it was not attracted to commercial interest due to low productivity and non-uniformity of fiber fineness.However, due to the development of fiber technology and the recent attention of nano industry, Many developments and advancements have resulted in the development of electrospinning apparatus capable of producing commercially viable nanofibers.

In the method and apparatus for producing nanofibers from a polymer solution through electrostatic radiation, described in Korean Patent Application No. 10-2008-7000423, a polymer solution supply part, a nozzle type, a spinning electrode, and a collecting electrode are provided. Nanofibers were prepared by applying a high voltage when supplying a solution.

In this method, the polymer solution is not supplied into the cylindrical nozzle but directly buried on the surface of the polymer solution, and then manufactured into nanofibers by the electric field force.

The cylindrical electrospinning apparatus has a disadvantage that the supply amount of the solution is not constant and difficult to control because the spinning proceeds in a form in which the polymer solution is stored in the tank and the nozzle contacts the solution. Even if the solution supply in the polymer solution tank was adjusted to a certain level, there was a difficulty in changing the new variation and the nanofiber diameter deviation when the solution viscosity was different.

In addition, since the distance between the radiation electrode of the nozzle and the focusing device is located in a semicircle, the electrospinning device according to the conventional method is not constant, and thus the diameter of the nanofibers manufactured is thicker and farther away from the nozzle. A thinner diameter unevenness occurs in the nozzle. The method and apparatus for producing nanofibers from the polymer solution through the conventional electrospinning can be changed even if the nanofiber diameter is changed and the nanofiber nonwoven fabric is produced due to the supply amount of the polymer solution and the distance between the nozzle and the focusing device. The thickness of the nonwoven fabric cannot be produced uniformly, and the production speed decreases due to the limited number of nozzles.

The present invention is to solve the problems as described above, the present invention is to produce a nanofiber non-woven fabric excellent in uniformity by maintaining a uniform thickness of the nanofiber by rotating the nozzle that is electrospun and the nanofiber is radiated It is an object to provide a manufacturing method and a manufacturing apparatus.

In addition, an object of the present invention is to provide a method and apparatus for manufacturing a nanofiber nonwoven fabric which is easy for mass production of a nanofiber nonwoven fabric by increasing the yield of nanofibers by controlling the rotational speed and the spinning amount of the nozzle.

The present invention provides a method for manufacturing a nanofiber nonwoven fabric produced by concentrating a nanofiber produced by electrospinning a polymer spinning solution in a nozzle unit to a focusing apparatus, wherein the nozzle unit includes a plurality of nozzle modules in which two or more spinning nozzles are formed. It provides a method for producing a nanofiber nonwoven fabric using a rotary nozzle, characterized in that the nozzle module is rotated electrospinning.

In addition, the nozzle module provides a method for manufacturing a nanofiber nonwoven fabric using a rotary nozzle, characterized in that for rotating in the wind.

In addition, the present invention is a device for manufacturing a nanofiber non-woven fabric produced by focusing the nanofibers produced by electrospinning the polymer spinning solution in the nozzle unit to the focusing apparatus, wherein at least two spinning nozzles are formed on the upper side and the wind wing on the side Provided is a manufacturing apparatus of a nanofiber nonwoven fabric using a rotating nozzle, characterized in that it comprises a nozzle unit consisting of a plurality of rotating nozzle module, and an air injection unit for supplying wind to the wind wing to rotate the rotating nozzle module. do.

In addition, the wind wing is provided with a nanofiber non-woven fabric manufacturing apparatus using a rotating nozzle, characterized in that formed in the nozzle module four or more in a curved plate shape.

In addition, the air injection unit provides a manufacturing apparatus of the nanofiber nonwoven fabric using a rotating nozzle, characterized in that each formed on both sides of the nozzle module.

In addition, the air injection unit provides an apparatus for manufacturing nanofiber nonwoven fabric using a rotary nozzle comprising an air distribution unit for distributing compressed air and an air injection port for spraying the air is formed on one side of the air distribution unit. do.

In addition, the air injection port provides an apparatus for manufacturing a nanofiber nonwoven fabric using a rotary nozzle, characterized in that the injection direction is controlled.

In addition, the length of the spinning nozzle provides a nanofiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that 5mm or more.

In addition, the spinning nozzle provides a nanofiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that the diameter of 0.01mm or more.

In addition, the wind speed of the air generated by the air injection unit provides a nanofiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that 10 ~ 100m / s.

In addition, the distance between the air injection unit and the nozzle unit provides a nanofiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that 5 ~ 30cm.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the meanings indicated are intended to aid the understanding of the invention. Accurate or absolute figures are used to assist in the prevention of unfair use by unscrupulous infringers.

The present invention is a nanofiber non-woven fabric manufacturing method and apparatus for producing a nanofiber is produced by compression after the polymer spinning solution is electrospun from the nozzle unit as shown in Figure 1 to focus the prepared nanofiber to the focusing apparatus It is about.

The method for manufacturing a nanofiber nonwoven fabric according to the present invention is to manufacture a nanofiber nonwoven fabric having excellent uniformity by controlling nanofibers radiated by using a rotating nozzle, and the nozzle part includes a plurality of nozzle modules in which two or more spinning nozzles are formed. The nozzle module is rotated and electrospun to produce a nanofiber nonwoven fabric.

Preferably, the nozzle module is formed and rotated independently, and may be rotated using a motor or a conveyor belt or a chain. However, when the motor is used, the radioactivity of the nanofibers may be reduced by the influence of magnets embedded in the motor. If the belt or chain is used, the radioactivity of the belt and the chain may be reduced due to the static electricity generated by the friction with the nozzle module. Therefore, the nozzle module is rotated through the wind by forming wind blades to receive the wind force on the nozzle module. It would be desirable to.

The manufacturing apparatus for carrying out the method of manufacturing a nanofiber nonwoven fabric using the rotating nozzle as described above is a nozzle consisting of a nozzle module 130 which is formed by spinning nozzle 110 in which the polymer spinning liquid is electrospun as shown in FIG. It consists of a concentrator 300 to focus the nanofibers radiated from the unit 100 and the nozzle unit and the air injection unit 200 for generating wind power to rotate the nozzle module 130.

The nozzle unit 100 is formed of a plurality of rotatable nozzle module 130 may be composed of a small number of dozens to many thousands depending on the size of the manufacturing apparatus, the size of the nonwoven fabric to be manufactured.

As shown in FIG. 2, the nozzle module 130 has two or more spinning nozzles 110 formed at an upper portion thereof, and wind blades 150 are formed at a side thereof to receive wind force, and a polymer spinning liquid may be supplied to the radiation nozzles 110 at a lower portion thereof. A supply path is formed therein so as to form a spinning solution supply pipe 170 supporting the nozzle module 130.

The number of the spinning nozzles 110 formed on the nozzle module 130 is good to produce a large number of spinning nozzles 110, but to form a proper number according to the size of the nozzle module 130 to minimize the charge repulsive force.

The length of the spinning nozzle 110 is preferably manufactured in an appropriate length according to the concentration, viscosity, and surface tension of the polymer solution, but having a length of 5 mm or more can suppress the decrease in radioactivity due to charge repulsion. Preferably it forms in 20-40 mm.

In addition, the diameter of the spinning nozzle 110 should have an appropriate diameter according to the concentration, viscosity, and surface tension of the polymer solution.

When the diameter of the spinning nozzle of the nanofiber nonwoven fabric manufacturing apparatus according to the present invention is less than 0.01 mm, the radioactivity may be lowered, so it is preferable that the diameter of the spinning nozzle is 0.01 mm or more, and more preferably 0.2 to 10 mm.

The wind vane 150 is a wind formed by the air injection unit 200 to rotate the nozzle module 130 is preferably formed in a curved plate shape as shown in Figure 2, four or more are formed in the nozzle module is weak It may be desirable to form the nozzle module sufficiently to rotate in the wind or wind of various angles.

In addition, it is preferable that the material of the wind vane 150 uses a shape deformation material to minimize the loss of wind power due to the shape deformation caused by the wind.

In addition, the position of the wind wing may be formed on the side of the upper portion of the spinning nozzle 110, as shown in Figure 2, if the spinning liquid supply pipe 170 is formed to rotate together may be formed on the side of the spinning liquid supply pipe. will be.

 The spinning solution supply pipe 170 may be configured to support the nozzle module 130 and to supply a polymer spinning solution to the spinning nozzle 110 and to rotate together with the nozzle module, or to be configured independently of the nozzle module 130. Could be.

The air injection unit 200 is a device for forming air by injecting air and is formed of an air injection unit 210 through which air is injected and an air distribution unit 230 for distributing air so that wind of the same wind speed is formed in the air injection port 210.

The cantilever injection unit 200 may rotate the nozzle module 130 by injecting air from one side, but it is preferable to rotate the nozzle module 130 by spraying air in both directions of the nozzle unit 100 as shown in FIGS. 3 and 4. .

When the air is injected in both directions of the nozzle unit 100 as described above, as shown in FIG. 4, the wind directions of both air injection ports 210 are formed to cross each other so that the wind is transmitted to the wind vanes 150 on both sides of the nozzle module 130. It is desirable to.

In addition, the air injection port 210 is formed to control the direction of the wind up and down or to adjust the direction of the wind from side to side as shown in Figure 5 so that the wind injected from the air injection port does not affect the radiation nozzle radioactive It may be formed so as not to degrade.

The wind speed of the wind generated by the air injection unit 200 should be adjusted to an appropriate wind speed in consideration of the size of the nozzle unit, the size of the nozzle module.

If the wind speed of the air injection unit 200 is too low, it is difficult to rotate the nozzle module 130 and the wind may be dispersed by the air, which may lower the radioactivity, and thus generate wind at 10 m / s or more, more preferably. The nozzle module 130 is rotated at a wind speed of 10 to 100 m / s.

In addition, the wind generated by the air injection unit 200 it is preferable to use compressed air using an air compressor.

When using the above compressed air it is preferable that an independent air flow path tube is formed for the same pressure and smooth transfer of the compressed air from the air compressor to the air injection port.

In addition, when the air flow path tube is formed, the extruded air suction tube may be formed so that compressed air does not leak.

The distance between the air injection unit 200 and the nozzle unit 100 should be adjusted according to the size of the nozzle module 130, but if the distance is too far, the wind of the air injection unit may be dispersed in the air so that the distance between the air injection unit and the nozzle unit is 30 cm or less. It is preferable to have a distance of 5-30 cm more preferably.

As described above, the method of manufacturing a nanofiber nonwoven fabric using the rotating nozzle according to the present invention controls the radial direction of the nanofibers radiated from the spinning nozzle to control the amount of focus on the focusing device, thereby producing a nonwoven fabric having excellent uniformity. There is.

In addition, it is possible to improve the spinning of the nanofiber through the rotation of the nozzle module, there is an effect that can control the production speed.

In addition, the nanofiber nonwoven fabric manufacturing apparatus using the rotary nozzle according to the present invention has the effect of rotating the nozzle module through the wind does not lower the radioactivity of the nanofibers.

1 is a schematic diagram of a nanofiber nonwoven fabric manufacturing apparatus according to the present invention.
Figure 2 is a perspective view of the nozzle portion of the nanofiber nonwoven fabric manufacturing apparatus according to the present invention.
Figure 3 is a perspective view of the air injection unit and the nozzle portion of the nanofiber nonwoven fabric manufacturing apparatus according to the present invention.
Figure 4 is a perspective view showing the injection direction for the nozzle portion of the air injection port of the nanofiber nonwoven fabric manufacturing apparatus according to the present invention.
5 is a perspective view showing the injection direction of the air injection port of the nanofiber nonwoven fabric manufacturing apparatus according to the present invention.
6 is an electron micrograph of a nanofiber nonwoven fabric prepared in Example 1 of the present invention.
7 is an electron micrograph of a nanofiber nonwoven fabric prepared in Example 2 of the present invention.

Hereinafter, the present invention will be described in more detail with reference to examples using the manufacturing method and manufacturing apparatus according to the present invention.

Example 1

A polymer solution was prepared by dissolving a nylon 66 chip having a relative viscosity of 2.8 in a formic acid solvent at a concentration of 15% by weight. The spinning solution had a viscosity of 58 mN / m, a surface tension of 980 centipoise (cPs), and an electrical conductivity of 400 mS / m.

The spinning solution was supplied to the nozzle unit in a predetermined amount through a solution supply device to fill the polymer solution in the spinning nozzle, and then a high voltage of 30kV was applied to spin the nanofibers.

At this time, the spinning nozzle was formed to be rotatable as shown in FIG. 2, and the diameter of the nozzle module was formed to be 8 mm, and eight spinning nozzles were formed on the nozzle module.

The upper diameter of the nozzle module is 6mm, the length of the spinneret is 8mm, the diameter of the spinneret is 0.5mm, as shown in FIG. The nozzle module was rotated by forming wind to slow down. The wind speed was 15 m / s injected air.

The production rate of the nanofibers by the nanofiber nonwoven fabric manufacturing apparatus using the spinning nozzle of the spinning process was prepared at 2 m / min.

The result of measuring the surface of the prepared nanofiber nonwoven fabric with an electron microscope is as shown in Figure 6 and the average diameter of the nanofibers was 80 ~ 120 nm.

Example 2

Polyvinylidene fluoride having a weight average molecular weight of 440,000 was prepared at a concentration of 7% by weight in a dimethylacetamide / acetone (volume ratio: 70/30) mixed solvent, and electrospinning was carried out in the same manner as in Example 1. According to the nanofiber forming capacity, the production speed of the nanofiber was prepared at 1 m / min.

The result of measuring the surface of the prepared nonwoven fabric by an electron microscope is shown in FIG. 7, and the average nanofiber diameter was 200 to 250 nm.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. Will be evident to those who have knowledge of

100 nozzle unit 110 spinning nozzle
130: nozzle module 150: wind wing
170: spinning liquid supply pipe 200: air injection unit
210: air injection port 230: air distribution unit
300: focusing device

Claims (11)

In the manufacturing method of the nanofiber nonwoven fabric produced by focusing the nanofibers produced by electrospinning the polymer spinning solution in the nozzle unit to the focusing device,
The nozzle unit comprises a plurality of nozzle modules formed with two or more spinning nozzles, the method of manufacturing a nanofiber nonwoven fabric using a rotating nozzle, characterized in that the nozzle module is rotated electrospinning. The method of claim 1,
The nozzle module is a method of manufacturing a nanofiber nonwoven fabric using a rotary nozzle, characterized in that for rotating in the wind. In the manufacturing apparatus of the nanofiber nonwoven fabric produced by focusing the nanofibers produced by electrospinning the polymer spinning solution in the nozzle unit to the focusing device,
A nozzle unit including a plurality of spinning nozzle modules having two or more spinning nozzles formed on the upper side and wind blades formed on the side thereof;
Apparatus for manufacturing a nanofiber nonwoven fabric using a rotary nozzle, characterized in that it comprises an air injection unit for supplying wind to the wind blade to rotate the rotary nozzle module. The method of claim 3,
The wind blades are bent plate-shaped nanofiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that formed in the nozzle module four or more. The method of claim 3,
The air injection unit is a nanofiber nonwoven fabric manufacturing apparatus using a rotating nozzle, characterized in that formed on both sides of the nozzle module. The method of claim 3,
The air injection unit is a nano-fiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that composed of an air distribution unit for distributing compressed air and an air injection port for spraying the air is formed on one side of the air distribution unit. The method of claim 6,
The air injection port is a nanofiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that the injection direction is controlled. The method of claim 3,
Apparatus for manufacturing a nanofiber nonwoven fabric using a rotating nozzle, characterized in that the length of the spinning nozzle is 5mm or more. The method of claim 3,
The spinning nozzle diameter of the nanofiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that 0.01 ~ 10mm. The method of claim 3,
The wind speed of the air generated by the air injection unit is a nanofiber nonwoven fabric manufacturing apparatus using a rotary nozzle, characterized in that 10 ~ 100m / s. The method of claim 3,
Apparatus for producing a nanofiber nonwoven fabric using a rotary nozzle, characterized in that the distance between the air injection portion and the nozzle portion is 5 ~ 30cm.

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