WO2017095105A1

WO2017095105A1 - Electrospinning-type pattern forming device

Info

Publication number: WO2017095105A1
Application number: PCT/KR2016/013855
Authority: WO
Inventors: 황원태
Original assignee: 주식회사 에이앤에프
Priority date: 2015-12-01
Filing date: 2016-11-29
Publication date: 2017-06-08
Also published as: KR101787479B1; KR20170064201A; JP2018536777A

Abstract

Disclosed is an electrospinning-type pattern forming device. The electrospinning-type pattern forming device comprises: a nozzle to which a first voltage is applied and which spins a spinning solution; a stage part which is disposed at the lower portion of the nozzle, which supports a substrate on which a pattern is to be formed, and to which a second voltage is applied; a first nanofiber guide part provided with first and second guide bodies disposed apart from each other between the nozzle and the stage part, and modifying an electric field and applying a force that acts upon the nanofiber in a certain direction; and a second nanofiber guide part provided with third and fourth guide bodies separated from each other and disposed on the upper portion of the first and second guide bodies, respectively, and modifying an electric field and guiding the nanofiber to a region between the first and second guide bodies.

Description

Electrospinning pattern forming device

The present invention relates to an electrospinning pattern forming apparatus, which may form a predetermined pattern by spinning the nanofibers by the electrospinning method.

Drawing, template synthesis, phase separation, self assembly, electrospinning, and the like are known as methods for producing nanofibers. Among these methods, electrospinning is generally applied as a method for continuously producing nanofibers.

In the electrospinning method, a high voltage is applied between the nozzle for spinning the spinning solution and the stage on which the substrate is disposed to form an electric field larger than the surface tension of the spinning solution, so that the spinning solution is spun in the form of nanofibers. Nanofibers produced by the electrospinning method are affected by the material properties such as the viscosity, elasticity, conductivity, dielectric properties, polarity and surface tension of the spinning solution, the strength of the electric field, and the distance between the nozzle and the integrated electrode.

Nanofiber forming method by the electrospinning method is a well known technique. On the other hand, there have been attempts to arrange the thus formed nanofibers in a desired direction, and the representative methods include electrospinning adjacent electrodes formed to obtain aligned nanofibers, and keeping the distance between the nozzle and the substrate very close. There is a method of arranging nanofibers in a desired position. However, these methods have problems in practical use.

An object of the present invention is to provide an electrospinning pattern forming apparatus capable of precisely forming a fine pattern by arranging nanofibers in one direction.

Electrospinning pattern forming apparatus according to an embodiment of the present invention is a first voltage is applied, the nozzle for spinning the nanofibers from the spinning solution; A stage unit disposed under the nozzle to support a substrate on which a pattern is to be formed and to receive a second voltage different from the first voltage; And a first guide body and a second guide body disposed to be spaced apart from each other with the extension line of the nozzle interposed between the nozzle and the stage part, wherein the electric field formed between the nozzle and the stage part is deformed to form the nanofibers. A first nanofiber guide portion arranged to align in a direction corresponding to a region between the first and second guide bodies; And a third guide body and a fourth guide body disposed on the first guide body and the second guide body and spaced apart from each other, and deforming the electric field formed between the nozzle and the stage unit to modify the nanofibers. And a second nanofiber guide part that guides to a region between the first and second guide bodies.

The first and second guide bodies may be spaced apart from each other with an imaginary extension line extending from the nozzle in a direction perpendicular to the stage, and each of the first and second guide bodies may be parallel to the stage. The third and fourth guide bodies are spaced apart from each other with the imaginary extension line interposed therebetween and extend in the first direction, and each of the first to fourth guide bodies has a relative dielectric constant of 50 or less. It can be formed of a material. For example, each of the first and second guide bodies and the third and fourth guide bodies is a group consisting of styrofoam material, Teflon material, wood material, plastic material, rubber material, glass material, quartz material and silicon oxide material. It may be formed of one or more materials selected from.

In one embodiment, the lower surfaces of the third and fourth guide body may be located below the end of the nozzle.

In one embodiment, the upper surface of the first and second guide body and the lower surface of the third and fourth guide body may be in contact with each other or spaced at intervals of 30 mm or less.

In one embodiment, the first spacing interval between the first guide body and the second guide body may be equal to or smaller than the second spacing interval between the third guide body and the fourth guide body. In this case, the second spacing may be 4/3 to 8/3 times the first spacing.

In an embodiment, the electrospinning pattern forming apparatus may include a first position adjusting unit capable of moving the first nanofiber guide part in up, down, left and right directions; And a second position adjusting unit capable of moving the second nanofiber guide unit in up, down, left and right directions independently of the first nanofiber guide unit.

According to the present invention, the first nanofiber guide portion formed of a material having a low relative dielectric constant may be used to deform an electric field between the nozzle and the stage portion to apply a force acting in one direction to the nanofibers, thereby providing nano The fibers can be arranged and positioned in one direction, resulting in nanofiber membranes or felts with alignment maintained with a thickness of tens of micrometers or more on the substrate.

In addition, by using a second nanofiber guide portion formed of a material having a low relative dielectric constant and disposed on the first nanofiber guide portion, nanofibers may be formed between the first guide body and the second guide body of the first nanofiber guide portion. By guiding to the regions, nanofiber membranes or felts with improved orientation can be produced.

1 is a view for explaining an electrospinning pattern forming apparatus according to an embodiment of the present invention.

FIG. 2 includes a first electrospinning pattern forming apparatus (left) that does not include the first and second nanofiber guide parts, and includes only the first nanofiber guide part among the first and second nanofiber guide parts. It is the photographs which measured the intensity | strength of the Z-axis component of the electric field according to the Y-axis position in the 2nd electrospinning pattern forming apparatus (right side).

3 is a graph showing the strength of each Z-axis position of the Z-axis component of the electric field according to the Y-axis position in the first electrospinning pattern forming apparatus of FIG.

FIG. 4 is a graph showing the strength of each Z-axis position of the Z-axis component of the electric field according to the Y-axis position in the second electric pattern forming apparatus of FIG. 2.

5 is a Z-axis component of an electric field according to the Y-axis position at a point where the X-axis coordinates are '0' and the Z-axis coordinates are '30' in the first and second electrospinning pattern forming apparatus of FIG. Graph showing intensity.

6 and 7 illustrate the results of simulating the intensity of the Z-axis component electric field according to the X-axis position in the third electrospinning pattern forming apparatus including both the first nanofiber guide portion and the second nanofiber guide portion. Photos and graphs.

8 and 9 illustrate a second electrospinning pattern forming apparatus having only the first nanofiber guide portion among the first nanofiber guide portion and the second nanofiber guide portion, the Z-axis component electric field according to the X-axis position. Photos and graphs showing the results of simulations of intensity.

FIG. 10 illustrates that the X-axis coordinates and the Y-axis coordinates are '0' when the vertical separation intervals between the upper surface of the first nanofiber guide portion and the lower surface of the second nanofiber guide portion are 30 mm, 20 mm, 10 mm, and 0 mm. It is a graph showing the intensity of the electric field according to the distance (Z-axis coordinate) from the point to the Z-axis direction.

FIG. 11 illustrates the distance in the Z-axis direction (Z-axis coordinate) from the point where the X-axis coordinate and the Y-axis coordinate are '0' when the horizontal separation interval between the third guide body and the fourth guide body is changed. Is a graph showing the Z-axis component electric field strength,

12 are graphs showing the strengths of the Z-axis positions of the Z-axis component electric fields according to the X-axis positions when the horizontal separation intervals between the third guide body and the fourth guide body are 30 mm, 50 mm, 70 mm, and 90 mm, respectively. .

* Description of Drawing Symbols *

100: pattern forming apparatus 110: solution spinning unit

111: syringe 112: nozzle

120: stage portion 130: first nanofiber guide portion

131: first guide body 132: second guide body

140: second nanofiber guide portion 141: third guide body

142: fourth guide body

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. The present invention may be variously modified and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the present invention. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structures are shown to be enlarged or reduced than actual for clarity of the invention.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise", "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, or combination thereof described on the specification, and one or the same. It is to be understood that the present invention does not exclude in advance the possibility of the presence or addition of other features, numbers, steps, operations, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those generally used and defined in the dictionary should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. .

Referring to FIG. 1, the electrospinning pattern forming apparatus 100 according to the embodiment of the present invention may directly form a desired fine pattern on the substrate 20 by electrospinning the spinning solution 10. To this end, the electrospinning pattern forming apparatus 100 according to an embodiment of the present invention is the solution spinning unit 110, the stage unit 120, the first nanofiber guide unit 130 and the second nanofiber guide unit ( 140).

The solution radiating unit 110 may include a syringe 111 and a nozzle 112.

The syringe 111 may accommodate the spinning solution 10. The spinning solution 10 may be an organic material solution such as a polymer or an organic / inorganic composite material solution in which an organic material and an inorganic material are mixed, and may have a viscosity of about 1 to 200 poise. The nozzle 112 may be connected to the syringe 111 and may radiate the spinning solution 10 accommodated in the syringe 111 in the direction of the stage unit 120. The nozzle 112 may be formed of a conductive material, for example, stainless material, and may have a microtubule shape having a constant inner diameter and an outer diameter.

The stage unit 120 may be disposed to be spaced apart from the end of the nozzle 112 from which the spinning solution 10 is radiated. The stage unit 120 may be formed of a conductive material. The stage unit 120 may support the substrate 20 on which a pattern made of nanofibers is to be formed.

Different first and second voltages may be applied to the nozzle 112 and the stage 120, respectively, and an electric field may be formed between the nozzle 112 and the stage 120. In the case of spinning the spinning solution through the nozzle 112, the spinning solution 10 distributed at the tip of the nozzle 112 has a hemispherical drop shape by the surface tension, and the spinning solution by the voltage applied to the nozzle 112. On the drop surface of 10, electric charges of the same polarity as the voltage applied to the nozzle 112 are induced to generate an electrostatic repulsive force. Due to the action of the electrostatic repulsion, the droplet of spinning solution 10 hanging on the tip of the nozzle 112 is stretched into a conical shape known as a Taylor cone. When the intensity of the electric field formed between the nozzle 112 and the stage portion 120 is greater than the intensity of a specific critical electric field, the jet of the spinning solution 10 jet is emitted from the tip of the spinning solution 10 TaylorCon. When the viscosity of the spinning solution 10 is low, the jet of the spinning solution 10 collapses into fine droplets, but when the viscosity of the spinning solution 10 is above the threshold, the jet of the spinning solution 10 does not collapse due to the surface tension. It is spun in the direction of the stage portion 120 in the form of a continuous fiber. In the present invention, since the spinning solution 10 has a viscosity of about 1 to 200 poise, it can be spun in the form of fibers. Spinning solution 10 The spinning solution 10 fibers emitted from the Taylor cone may have a diameter of nanoscale. Hereinafter, the 'fiber of the spinning solution 10' released from the spinning solution 10 TaylorCon is referred to as a 'nano fiber' for convenience of description. When the nanofibers have a high volume current density, bending occurs due to inherent instability of the nanofibers. The location of bending of the nanofibers varies depending on the degree of charge of the nanofibers and the properties of the solution such as permittivity, conductivity, and viscosity. For example, the higher the degree of charge of the nanofibers, the more likely the bending of the nanofibers occurs at a location closer to the tip of the nozzle 112.

The first and second nanofiber guides 130 and 140 guide the advancing direction of the nanofibers radiated from the nozzle 112. In one embodiment, the first nanofiber guide portion 130 is located between the nozzle 112 tip and the stage portion 120, the second nanofiber guide portion 140 is the nozzle 112 tip and the first nanofiber It may be disposed between the guide portion 130. The first and second nanofiber guide parts may guide an advancing direction of the nanofibers by modifying an electric field formed between the nozzle 112 and the stage part 120. In an embodiment, the first and second

nanofiber guide parts

130 and 140 may be formed of a material having a low relative dielectric permittivity. For example, the first and second

nanofiber guide parts

130 and 140 may be formed of a material having a relative dielectric constant of about 50 or less. Specifically, the first and second nanofiber guides 130 and 140 may be formed of a material such as styrofoam, teflon, wood, plastic material, rubber, glass, quartz, silicon oxide, but is not limited thereto.

In one embodiment of the present invention, the first nanofiber guide portion 130, the first guide body 131 and the second guide body 132 spaced at a predetermined interval from each other with an extension line of the nozzle 112 therebetween. The second nanofiber guide unit 140 may be spaced apart from each other with an extension line of the nozzle 112 interposed therebetween, respectively positioned above the first guide body 131 and the second guide body 132. The third guide body 141 and the fourth guide body 142 may be included.

The first and

second guide bodies

131 and 132 may extend in one direction and a Y-axis direction parallel to the stage 120 and may be disposed in parallel to each other. The first and

second guide bodies

131 and 132 may have the same shape and size. For example, each of the first and

second guide bodies

131 and 132 may have a rod shape having a cross section of a circle, a polygon, a semicircle, an ellipse, or the like, or may have a plate shape. For example, each of the first and

second guide bodies

131 and 132 may have a rectangular cross-section cut along the XZ plane, and may have a rectangular parallelepiped rod shape extending in a direction Y perpendicular to the XZ plane. .

The first and

second guide bodies

131 and 132 may form an electric field that applies a force acting in the Y-axis direction to the nanofiber by modifying an electric field formed between the tip of the nozzle 112 and the stage 120. . When an electric field force acting in the Y-axis direction is applied to the nanofibers, the flow may increase in the Y-axis direction of the nanofibers, so that the nanofibers are uniformly aligned in the Y-axis direction in a larger area. Can be.

To this end, the first and

second guide bodies

131 and 132 are arranged to be spaced apart from each other by a predetermined interval, and when the first and

second guide bodies

131 and 132 are projected on the XY plane, between the first and

second guide bodies

131 and 132. It is preferable that open spaces are formed at both ends of the

sieves

131 and 132.

The third and

fourth guide bodies

141 and 142 may be disposed on the first and

second guide bodies

131 and 132, respectively, and may extend in the Y-axis direction and may be disposed in parallel to each other. When the volume current density of the nanofibers is high, the degree of instability inherent in the nanofibers increases, so that the charged nanofibers are difficult to pass between the first and

second guide bodies

131 and 132. The

guide bodies

141 and 142 may modify the electric field between the tip of the nozzle 112 and the stage 120 to guide the nanofibers so that the nanofibers pass between the first and

second guide bodies

131 and 132. have.

The third and

fourth guide bodies

141 and 142 may have the same shape and size. For example, each of the third and

fourth guide bodies

141 and 142 may have a rod shape having a cross section of a circle, a polygon, a semicircle, an ellipse, or the like, or may have a plate shape. However, the third and

fourth guide bodies

141 and 142 are disposed to be spaced apart from each other by a predetermined interval, and when the third and

fourth guide bodies

141 and 142 are projected on the XY plane, the third and fourth guide bodies are arranged between the third and

fourth guide bodies

141 and 142. It is preferable that open spaces are formed at both ends of the

sieves

141 and 142.

For example, each of the third and

fourth guide bodies

141 and 142 may have a rectangular cross section cut along the XZ plane, and may have a rectangular parallelepiped rod shape extending in a direction Y perpendicular to the XZ plane.

In one embodiment, the width in the X-axis direction of each of the third and

fourth guide bodies

141 and 142 may be smaller than the width in the X-axis direction of each of the first and

second guide bodies

131 and 132. As a result, the spacing D2 between the third guide body 141 and the fourth guide body 142 is the spacing D1 between the first guide body 131 and the second guide body 132. Can be greater than

In addition, in order to stably guide the nanofibers into the space between the first guide body 131 and the second guide body 132, the upper surfaces of the third guide body 141 and the fourth guide body 142 may be nano. It is desirable to be positioned higher than the point where the bending of the fiber occurs. For example, when the bending point of the nanofibers occurs at a position away from, for example, less than about 2 cm from the tip of the nozzle 112, the upper surfaces of the third and

fourth guide bodies

141 and 142 may be The third and

fourth guide bodies

141 and 142 are disposed at a position higher than the tip of the nozzle 112 and the bending point of the nanofiber occurs at a position separated by about 2 cm or more from the tip of the nozzle 112. The top surface of the c) is preferably disposed at a position lower than the tip of the nozzle 112.

In the electrospinning pattern forming apparatus 100 according to the embodiment of the present invention, the first position adjusting unit (not shown) and the first nanofiber guide unit capable of moving the first nanofiber guide unit 130 in the up, down, left and right directions are provided. A second position adjusting part (not shown) may be further included to move the second nanofiber guide part 140 in up, down, left and right directions independently of the 130. The height of each of the first and second

nanofiber guide parts

130 and 140, and the separation gap between the first guide body 131 and the second guide body 132 by the first and second position adjusting parts ( D1), the spacing D2 between the third guide body 141 and the fourth guide body 142, and the spacing between the first nanofiber guide part 130 and the second nanofiber guide part 140 ( S) can be adjusted as needed.

FIG. 2 includes a first electrospinning pattern forming apparatus (left) that does not include the first and second nanofiber guide parts, and includes only the first nanofiber guide part among the first and second nanofiber guide parts. It is the photographs which measured the intensity | strength of the Z-axis component of the electric field according to the Y-axis position in the 2nd electrospinning pattern forming apparatus (right side). 3 is a graph showing the strength of each Z-axis position of the Z-axis component of the electric field according to the Y-axis position in the first electrospinning pattern forming apparatus of FIG. 2, FIG. In the forming apparatus, it is a graph showing the strength of each Z-axis position of the Z-axis component of the electric field according to the Y-axis position, Figure 5 is a X-axis coordinate in the first and second electrospinning pattern forming apparatus of FIG. It is a graph showing the strength of the Z-axis component of the electric field according to the Y-axis position at the point '0' and the Z-axis coordinates '30'. 3 and 4, 'Z- (2) curve', 'Z- (12) curve', 'Z- (12) curve', 'Z- (32) curve', 'Z- (42)' Curves ',' Z- (52) curves 'and' Z- (62) curves 'have Z axis coordinates of' 2 ',' 12 ',' 22 ',' 32 ',' 42 ',' 52 'and' The Z-axis component intensities of the electric fields at the points 62 'are respectively shown.

2 to 5, in the first electrospinning pattern forming apparatus, the intensity of the electric field continuously decreases as the distance from the nozzle end increases, that is, as the Z-axis coordinate decreases. When the Z-axis coordinates are the same, the electric field intensity decreases as the intensity of the electric field is greatest at the position where the Y-axis coordinate is '0' and the distance from the position where the Y-axis coordinate is '0' increases.

On the other hand, in the second electrospinning pattern forming apparatus, the Z axis coordinates are set to 'Z' for the positions located between '+15' and '+45', that is, between the first guide body and the second guide body. -(22) curve 'and' Z- (32) curve 'are smaller electric fields than' Z- (12) curve 'and' Z- (2) curve 'for points whose Z-axis coordinates are less than' +15 ' Indicates strength. In the 'Z- (22) curve' and the 'Z- (32) curve', the space between the first and second guide bodies, that is, the Y coordinate in the region between '-25' and '+25' The field strength is less than the field strength in the region where the Y coordinate is below '-25' or above '+25'. In particular, referring to FIG. 5, the electric field at the position where the Z-axis coordinate, which is the center point of the first and second guide bodies in the Z-axis direction, is '+30' has Y coordinates of '-20' and '+20'. In the first region between, it shows relatively low electric field strength, and because of the corners of both end portions of the first and second guide bodies, the Y coordinate is between '-40' and '-20' and '+20' and ' In the region between +40 '(not shown), the intensity of the electric field is increased than the first region. Thus, nanofibers passing between the first and second guide bodies are subject to increased electric field in the region between '-40' and '-20' or in the region between +20 'and' +40 '(not shown). This is the force acting in the Y-axis direction. That is, when the first and second guide bodies are connected to each other, an electric field force acting in the Y-axis direction may not occur in the nanofibers, so that both ends of the first and second guide bodies are spaced apart from each other. desirable.

6 and 7 illustrate the results of simulating the intensity of the Z-axis component electric field according to the X-axis position in the third electrospinning pattern forming apparatus including both the first nanofiber guide portion and the second nanofiber guide portion. Photos and graphs. 8 and 9 illustrate a Z-axis component electric field according to the X-axis position in the second electrospinning pattern forming apparatus including only the first nanofiber guide portion among the first nanofiber guide portion and the second nanofiber guide portion. Photographs and graphs showing the results of simulating the intensity.

In FIG. 6, FIG. 7, FIG. 8, and FIG. 9, Y-axis coordinate shows the distance (mm) in the extension direction of the 1st-

4th guide body

131, 132, 141, and 142, and X-axis coordinate is The distance (mm) in the direction parallel to the stage portion 120 and perpendicular to the Y axis is shown, and the Z axis coordinate is the distance (mm) in the direction perpendicular to the X axis and the Y axis. The point where the X-axis coordinate and the Y-axis coordinate are '0' is located on the extension line of the nozzle 112, and the point where the Z-axis coordinate is '0' is located on the upper surface of the stage unit 120. The spacing D1 between the first guide body 131 and the second guide body 132 is 30 mm, and the spacing D2 between the third guide body 141 and the fourth guide body 142 is 50 mm, and the distance from the top surface of the stage portion 120 to the tip of the nozzle 112 is 65 mm. The distance from the upper surface of the stage portion 120 to the lower surface of the first and

second guide bodies

131 and 132 is 14 mm, and the first and

second guide bodies

131 and 132 and the third and fourth portions. The thicknesses in the Z-axis direction of the

guide bodies

141 and 142 are 30 mm and 30 mm, respectively, and the spacing S between the first nanofiber guide part 130 and the second nanofiber guide part 140 is '0 mm'. Meanwhile, in FIGS. 7 and 9, the black curve, the red curve, the blue curve, the green curve, the pink curve, the brown curve, and the purple curve have Z axis coordinates of '62', '52', '42', and '32'. , Field strengths along the X-axis coordinates at points '22', '12' and '2', respectively.

6, 7, 8 and 9 together with FIG. 1, it can be seen that the electric field in the third electrospinning pattern forming apparatus is different from the electric field in the second electrospinning pattern forming apparatus. In particular, the black curve and the red curve in the third electrospinning pattern forming apparatus are the same or similar in magnitude to the peak value compared to the black and red curves in the second electrospinning pattern forming apparatus. It can be seen that the area between the 141 and the fourth guide body 142, that is, the X axis coordinate is greater than or equal to '-15' and less than or equal to '+15', exhibits a significantly higher electric field strength than other areas. have. That is, in the case of the black curve and the red curve in the third electrospinning pattern forming apparatus, the X-axis coordinates are less than '-15' and '+15' by the third and

fourth guide bodies

141 and 142. It can be seen that the intensity of the electric field is significantly reduced in the region.

This is because the electric field formed in the third electrospinning pattern forming apparatus compared to the electric field formed in the second electrospinning pattern forming apparatus at a position between the first nanofiber guide 130 and the tip of the nozzle 112. By concentrating in the center direction means that the movement of the nanofibers in the X-axis direction by the bending of the nanofibers can be further reduced. As a result, compared to the second electrospinning pattern forming apparatus, the third guide body 141 and the fourth guide body 142 reduce the X-axis movement of the nanofibers in the third electrospinning pattern forming apparatus, thereby reducing the nanoparticles. The fiber may be guided more stably into the space between the first guide body 131 and the second guide body 132.

FIG. 10 illustrates X-axis coordinates and Y-axis coordinates when the vertical separation interval S between the upper surface of the first nanofiber guide portion and the lower surface of the second nanofiber guide portion is 30 mm, 20 mm, 10 mm, and 0 mm. It is a graph showing the intensity of the electric field according to the distance (Z-axis coordinate) in the Z-axis direction at the point of 0 '. In this embodiment only, the distance from the top surface of the stage portion 120 to the tip of the nozzle 112 is 80 mm, the height of the first nanofiber guide portion 130 and the height of the second nanofiber guide portion 140 are 30 mm and 20 mm was used. Accordingly, when the vertical direction spacing S is 30 mm, the first nanofiber guide part 130 comes into contact with the stage part 120.

In FIG. 10, the black curve, the red curve, the blue curve and the cyan curve are vertically spaced apart between the upper surface 130 of the first nanofiber guide portion 130 and the lower surface of the second nanofiber guide portion 140 (S). Indicates the field strength when 0 mm, 10 mm, 20 mm and 30 mm, respectively.

Referring to FIG. 1 along with FIG. 1, in the third electrospinning pattern forming apparatus including both the first nanofiber guide unit 130 and the second nanofiber guide unit 140, the first nanofiber guide unit When the vertical separation interval S between the upper surface of the 130 and the lower surface of the second nanofiber guide portion 140 is changed, the degree of deformation of the electric field by the first nanofiber guide portion 130 accordingly. You can see that is changed. Specifically, as the vertical separation interval S between the upper surface of the first nanofiber guide portion 130 and the lower surface of the second nanofiber guide portion 140 increases from 0 mm to 10 mm, the first nano fiber guide portion The position of the lowest point of the electric field intensity graph reduced by 130 is lowered, and as the position is lowered, the electric field strength in the space spaced in the vertical direction is increased. When the vertical direction spacing S is 30 mm, unlike the other cases, it can be seen that the difference between the lowest point of the electric field strength and the electric field strength on the upper surface of the stage unit 120 is low.

In summary, in order to pass the nanofibers to a region between the first guide body 131 and the second guide body 132 of the first nanofiber guide unit 130, the first nanofiber guide unit 130 may be used. The vertical separation interval S between the upper surface of the upper surface and the lower surface of the second nanofiber guide portion 140 should be adjusted in a range of about 10 mm to about 20 mm, and the first nanofiber guide portion 130 is a stage portion. It is preferred to be spaced apart from 120.

FIG. 11 illustrates the distance in the Z-axis direction (Z-axis coordinate) from the point where the X-axis coordinate and the Y-axis coordinate are '0' when the horizontal separation interval between the third guide body and the fourth guide body is changed. 12 is a graph showing the Z-axis component electric field strength, and FIG. 12 illustrates the Z-axis component electric field according to the X-axis position when the horizontal separation intervals between the third guide body and the fourth guide body are 30 mm, 50 mm, 70 mm, and 90 mm. These graphs show the intensity of each Z-axis.

In FIG. 11, the spacing D1 between the first guide body 131 and the second guide body 132 of the first nanofiber guide part 130 is '30 mm ', and a black curve, The red curve and the blue curve are the third guide body in the third electrospinning pattern forming apparatus including both the first nanofiber guide unit 130 and the second nanofiber guide unit 140. The electric field strength when the horizontal separation interval D2 between 141 and the fourth guide body 142 is '50 mm ', '70 mm' and '90 mm 'is shown. 1 shows the electric field strength in the second electrospinning pattern forming apparatus including only the first nanofiber guide unit 130 among the nanofiber guide unit 130 and the second nanofiber guide unit 140.

In FIG. 12, the black curve, the red curve, the blue curve, the green curve, the pink curve, the brown curve, and the violet curve are represented by the Z axis. The field strengths according to the X-axis coordinates at the points '62', '52', '42', '32', '22', '12' and '2' are respectively shown.

Referring to FIG. 11 along with FIG. 1, it can be seen that the Z-axis component electric field strength in the green curve is the largest and the Z-axis component electric field strength in the black curve is the smallest in the region where the Z-axis coordinate of the horizontal axis is 30 or more. Specifically, in the electrospinning pattern forming apparatus including both the first nanofiber guide portion 130 and the second nanofiber guide portion 140, in the region where the Z-axis coordinate is 30 or more, the third guide body 141. It can be seen that the intensity of the Z-axis component electric field increases as the horizontal separation interval D2 between the fourth guide body 142 and the second guide body 142 increases.

In contrast, it can be seen that the Z-axis component electric field strength in the black curve is the largest and the Z-axis component electric field strength in the green curve is the smallest in the region where the Z-axis coordinate is 0 or more and 15 or less. Specifically, in the electrospinning pattern forming apparatus including both the first nanofiber guide portion 130 and the second nanofiber guide portion 140, the third guide body 141 in the region where the Z-axis coordinate is 15 or less. It can be seen that the intensity of the Z-axis component electric field increases as the horizontal separation interval D2 between the fourth guide body 142 and the second guide body 142 decreases.

Referring to FIG. 1 together with FIG. 1, when the horizontal separation interval D2 between the third guide body 141 and the fourth guide body 142 is 30 mm, that is, the third guide body 141. In the case of horizontal spacing D2 between the fourth guide body 142 and the horizontal direction spacing D1 between the first guide body 131 and the second guide body 132, It can be seen that the peak value of the electric field strength is significantly lower than in other cases. On the other hand, when the horizontal separation interval D2 between the third guide body 141 and the fourth guide body 142 is 90 mm, between the first guide body 131 and the second guide body 132. Since it is excessively larger than the horizontal separation interval (D1) of the, even if the nanofiber guided by the third and fourth guide body (141, 142) between the first guide body 131 and the second guide body 132 Problems that are difficult to pass through to the space may occur.

In summary, when the horizontal separation interval D1 between the first guide body 131 and the second guide body 132 is 30 mm, the third guide body 141 and the fourth guide body 142. It is preferable that the horizontal direction spacing D2 between) is about 40 mm or more and 80 mm or less. That is, the horizontal separation interval D2 between the third guide body 141 and the fourth guide body 142 is the horizontal separation interval D1 between the first guide body 131 and the second guide body 132. Preferably about 4/3 to 8/3 times).

According to the present invention, the first and second nanofiber guides are used to deform the electric field formed between the nozzle and the stage, and the modified electric field is used to control the movement of the nanofibers in one direction on the substrate. It can be arranged and positioned, resulting in nanofiber membranes or felts having a thickness of tens of micrometers or more on a substrate and well maintained orientation.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

Claims

A nozzle to which a first voltage is applied and radiates nanofibers from the spinning solution;

A stage unit disposed under the nozzle to support a substrate on which a pattern is to be formed and to receive a second voltage different from the first voltage;

And a first guide body and a second guide body disposed to be spaced apart from each other with the extension line of the nozzle interposed between the nozzle and the stage part, wherein the electric field formed between the nozzle and the stage part is deformed to form the nanofibers. A first nanofiber guide portion arranged to align in a direction corresponding to a region between the first and second guide bodies; And

And a third guide body and a fourth guide body disposed on the first guide body and the second guide body, respectively, and spaced apart from each other, and deforming the electric field formed between the nozzle and the stage unit to change the nanofibers. Electrospinning pattern forming apparatus comprising a second nanofiber guide portion to guide to the region between the first and second guide body.
The method of claim 1,

The first and second guide bodies are spaced apart from each other with imaginary extension lines extending from the nozzle in a direction perpendicular to the stage unit, each extending in a first direction parallel to the stage,

The third and fourth guide bodies are spaced apart from each other with the imaginary extension line therebetween and extend in the first direction,

Each of the first to fourth guide bodies is formed of a material having a relative dielectric constant of 50 or less.
The method of claim 2,

The first and second guide bodies and the third and fourth guide bodies each include one or more selected from the group consisting of styrofoam material, Teflon material, wood material, plastic material, rubber material, glass material, quartz material and silicon oxide material. Electrospinning pattern forming apparatus, characterized in that formed of a material.
The method of claim 2,

Lower surface of the third and fourth guide body is located below the end of the nozzle, the electrospinning pattern forming apparatus.
The method of claim 2,

The upper surface of the first and second guide body and the lower surface of the third and fourth guide body are in contact with each other or spaced apart at intervals of 30 mm or less, the electrospinning pattern forming apparatus.
The method of claim 2,

The first spacing interval between the first guide body and the second guide body is an electrospinning pattern forming apparatus, characterized in that less than or equal to the second spacing interval between the third guide body and the fourth guide body. .
The method of claim 6,

The second spacing interval is electrospinning pattern forming apparatus, characterized in that 4/3 to 8/3 times the first spacing interval.
The method of claim 1,

A first position adjusting unit capable of moving the first nanofiber guide part in a vertical, horizontal, left and right direction; And

An electrospinning pattern forming apparatus further comprising a second position adjusting unit capable of moving the second nanofiber guide unit in up, down, left and right directions independently of the first nanofiber guide unit.