KR101701603B1 - Electro-spinning apparatus and method of manufacturing a transparent electrode using the same - Google Patents
Electro-spinning apparatus and method of manufacturing a transparent electrode using the same Download PDFInfo
- Publication number
- KR101701603B1 KR101701603B1 KR1020150050248A KR20150050248A KR101701603B1 KR 101701603 B1 KR101701603 B1 KR 101701603B1 KR 1020150050248 A KR1020150050248 A KR 1020150050248A KR 20150050248 A KR20150050248 A KR 20150050248A KR 101701603 B1 KR101701603 B1 KR 101701603B1
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- South Korea
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- nanofibers
- integrated substrate
- nanomaterial
- spinning
- layer
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/02—Spinnerettes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The present invention can arrange the nanofibers because the integrated substrate can be disposed within a straight radiation distance range in which the nanofibers are radiated in a linear form, and the nanofibers can be radiated in a linear form. Further, since the nanofibers can be aligned in a certain direction, a transparent electrode made of nanofibers having a directionality can be produced. Further, since the transparent electrode using the nanofibers of the grid pattern can be produced, the surface roughness and density of the transparent electrode can be precisely controlled. In addition, it is possible to provide a transparent electrode having a grid pattern having flexibility and stretchability by a simple and economical process, and the flexible display device or the flexible display device can be easily realized using the transparent electrode. Further, since the co-axial double-layer fiber is formed by spinning the nanomaterial and the polymer material together, and the polymer material is removed to provide the transparent electrode, the process is very simple and economical.
Description
The present invention relates to an electrospinning apparatus and a method of manufacturing a transparent electrode using the electrospinning apparatus, and more particularly, to an electrospinning apparatus for manufacturing nanofibers having an orientation and a coaxial double layer structure aligned in a predetermined direction as electrodes, And a method of manufacturing an electrode.
Due to the recent development of smart electronic devices, studies are being made on a flexible display device or a stretchable display device that replaces a conventional solid display device. A transparent electrode having transparency is required for a display device, and indium tin oxide (ITO) has been conventionally used. However, such indium tin oxide is low in flexibility and stretchability, and thus is hardly applicable to a flexible display device.
In order to overcome the limitations of such indium main line oxides, transparent electrodes using other materials, for example, graphene or silver nanowires, have been developed. However, research results to date show that transparent electrodes using graphene or silver nanowire have complicated processes, low reliability of the products, and high cost.
An object of the present invention is to provide an electrospinning device capable of manufacturing a transparent electrode having a grid pattern with flexibility and stretchability in a simple and economical process and a method of manufacturing a transparent electrode using the electrospinning device.
An electrospinning device according to the present invention is an electrospinning device including: an inner nozzle to which a voltage is applied and which radiates at least one of a nano material and a polymer material; and an inner nozzle that surrounds the inner nozzle and emits the other of the nano material and the polymer material A spinning nozzle for spinning a nanofiber comprising a nanomaterial layer formed of the nanomaterial and a polymer material layer formed of the polymer material, the nanofiber including an outer nozzle being a coaxial double layer; and a spinning nozzle for spinning the nanofiber from the spinning nozzle in a linear form An integrated substrate on which the nanofibers are integrated, and at least one of the spinning nozzle and the integrated substrate is moved in a direction perpendicular to the spinning direction of the nanofibers, A moving mechanism for aligning the radiated nanofibers in a predetermined alignment direction .
A method of manufacturing a transparent electrode using an electrospinning device according to the present invention is characterized in that at least one of the spinneret and the integrated substrate is disposed so that the distance between the spinneret and the integrated substrate is within a range of a straight- Applying a voltage to the spinneret to spin the nanofiber layer formed of the nanoparticle material and the polymer material layer formed of the polymer material into a linear form of a nanofiber composed of a coaxial bilayer layer; Moving at least one of the spinning nozzle and the integrated substrate in an aligned direction of the predetermined nanofibers so that nanofibers radiating in a linear form from the spinning nozzle are formed on the integrated substrate in alignment with the alignment direction; The nanofibers are arranged on the substrate in the alignment direction, To remove, and forming a transparent electrode composed of the nano material.
According to another aspect of the present invention, an electrospinning device of the present invention includes: an inner nozzle to which a voltage is applied and radiates at least one of a nano material and a polymer material; A spinneret for spinning nanofibers composed of a nanomaterial layer formed of the nanomaterial and a polymer material layer formed of the polymer material, the nanofibers being formed of a double-tube structure; And at least one of the spinning nozzle and the integrated substrate is moved in a direction perpendicular to the spinning direction of the nanofibers so that the nanofibers are stacked in a direction perpendicular to the spinning direction of the nanofibers, The nanofibers radiating in a linear form from the spinneret are aligned in a predetermined alignment direction And a moving mechanism for alignment.
The present invention can arrange the nanofibers because the integrated substrate can be disposed within a straight radiation distance range in which the nanofibers are radiated in a linear form, and the nanofibers can be radiated in a linear form. Further, since the nanofibers can be aligned in a certain direction, a transparent electrode made of nanofibers having a directionality can be produced.
Further, since the transparent electrode using the nanofibers of the grid pattern can be produced, the surface roughness and density of the transparent electrode can be precisely controlled.
In addition, it is possible to provide a transparent electrode having a grid pattern having flexibility and stretchability by a simple and economical process, and the flexible display device or the flexible display device can be easily realized using the transparent electrode.
Further, since the co-axial double-layer fiber is formed by spinning the nanomaterial and the polymer material together, and the polymer material is removed to provide the transparent electrode, the process is very simple and economical.
1 is a view showing an electrospinning apparatus according to an embodiment of the present invention.
FIG. 2 is a view schematically showing a state in which a spinning solution is radiated from the spinning nozzle shown in FIG. 1; FIG.
3 is an enlarged cross-sectional view of the spinning nozzle and the integrated substrate shown in Fig.
4 is an enlarged perspective view of nanofibers made up of a coaxial double layer by the electrospinning apparatus shown in FIG.
5 is a flowchart illustrating a method of manufacturing a transparent electrode using an electrospinning device according to an embodiment of the present invention.
Figure 6 is a schematic diagram illustrating the nanofiber crossing method shown in Figure 5;
7 is a photograph showing a nanofiber grid fabricated by the method shown in FIG.
8 is a view showing another example of the substrate in the electrospinning apparatus shown in Fig.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 is a view showing an electrospinning apparatus according to an embodiment of the present invention. FIG. 2 is a view schematically showing a state in which a spinning solution is radiated from the spinning nozzle shown in FIG. 1; FIG. 3 is an enlarged cross-sectional view of the spinning nozzle and the integrated substrate shown in Fig. 4 is an enlarged perspective view of nanofibers made up of a coaxial double layer by the electrospinning apparatus shown in FIG.
1, an
The spinning
The spinning solution tank 40 stores a spinning solution for spinning. The spinning solution comprises a nanomaterial and a polymeric material. The
The
The nanomaterial and
Also, the nanomaterial and the
The
In addition, the polymer material and the
The polymer material and the
The spinning
The syringe pump (not shown) pumps the spinning solution filled in the spinning
The integrated
The distance adjusting mechanism (not shown) moves at least one of the
2, the
The linear irradiation distance d may vary depending on the diameter of the spinning
The linear irradiation distance d is in a range larger than the diameter of the
The
An electrode is provided under the
The
The moving mechanism (not shown) is configured to move at least one of the spinning
The moving speed and the moving time of the moving mechanism (not shown) may be set in advance according to the intervals of the rows of the
Further, when the diameter of the
The moving speed of the
The
5 is a flowchart illustrating a method of manufacturing a transparent electrode using an electrospinning device according to an embodiment of the present invention. Figure 6 is a schematic diagram illustrating the nanofiber crossing method shown in Figure 5;
5 and 6, a method of manufacturing a transparent electrode using an electrospinning device according to an embodiment of the present invention will be described.
First, the distance between the
A voltage is applied to the spinning
The voltage may vary depending on the type of the spinning solution, the type of the
The polymer material in the
On the other hand, in the case of the proximity radiation in which the distance between the
As described above, when the distance between the spinning
When the
First, the
It is also possible to linearly move the
Referring to FIG. 6, the
6A, when the
When the
Thereafter, the
However, the present invention is not limited to this, and the
Referring to FIG. 4B, when the
The transparent electrode may further include a transparent conductive layer (not shown) formed on the
Alternatively, the
Fig. 8 is a view showing another example of the integrated substrate in the electrospinning apparatus shown in Fig. 1. Fig.
Referring to FIG. 8, the integrated substrate 120 may be a free standing substrate that does not support the lower side of the object to be integrated. The integrated substrate 120 may be a ring shape having a central portion penetrating therethrough. For example, the integrated substrate 120 may have a horseshoe shape in which a central portion is opened and an outer frame is not connected. It may also have a polygonal shape with a central portion open and an outer rim connected, or a polygonal shape with a central portion open and an outer rim connected.
When the integrated substrate 120 is used as the free standing substrate in manufacturing the transparent electrode, the aligned nanofibers irradiated to the integrated substrate 120 are separated from the integrated substrate 120, ).
The method of aligning the nanofibers to the integrated substrate 120 by aligning the nanofibers is the same as that of the above embodiment, and thus a detailed description thereof will be omitted.
While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.
10: Spinning nozzle 20: Integrated substrate
50: nanofiber 51: nanomaterial layer
52: Polymer material layer
Claims (17)
An integrated substrate on which the nanofibers are integrated;
And a moving mechanism for moving at least one of the spinning nozzle and the integrated substrate in a direction perpendicular to the spinning direction of the nanofibers so as to align the nanofibers emitted in the spinning nozzle in a predetermined alignment direction,
And removing the polymer material layer from the aligned nanofibers.
Further comprising a distance adjustment mechanism for moving at least one of the spinneret and the integrated substrate in the radial direction to adjust the distance between the spinneret and the integrated substrate to within the range of the linear radial distance.
Wherein the linear radiation distance range is larger than the diameter of the outer nozzle and smaller than 45 mm.
The diameter of the nanofibers to be integrated on the integrated substrate may be,
And is set based on the diameter of the outer nozzle and the moving speed of the integrated substrate.
Further comprising a rotating mechanism for rotating the integrated substrate at a predetermined angle.
A voltage is applied to the spinning nozzle to form a nanomaterial mixed with a nanomaterial and a solvent selected from the group consisting of gold, silver, copper, copper oxide and cobalt from the inner nozzle of the spinning nozzle on the integrated substrate A polymer solution containing a polymer material is radiated from an outer nozzle of the spinning nozzle to spin a nanomaterial layer formed of the nanomaterial and a polymer material layer formed of the polymer material to emit nanofibers composed of a coaxial double layer ;
Wherein at least one of the spinneret and the integrated substrate is moved in a predetermined alignment direction of the nanofibers so that the nanofibers emitted in a linear form from the spinneret are aligned on the integrated substrate in the alignment direction;
And removing the polymer material layer from the nanofibers to form an electrode.
Prior to forming the electrode,
Rotating the integrated substrate at a predetermined angle when the nanofibers are aligned in the alignment direction to form a first nanofiber layer;
Rotating the integrated substrate and spinning nanofibers comprising the nanomaterial layer and the polymeric material layer comprising a coaxial double layer on the first nanofiber layer;
Wherein at least one of the spinning nozzle and the integrated substrate is moved in an alignment direction of predetermined nanofibers to align the nanofibers emitted from the spinning nozzle in the alignment direction on the first nanofiber layer, And forming a second nanofiber layer crossing at a predetermined angle with respect to the first nanofiber layer.
Prior to forming the electrode,
Further comprising the step of separating the nanofibers from the integrated substrate and transferring the nanofibers to a separate substrate.
Wherein the integrated substrate is an electrospinning device that is a free standing substrate.
Wherein forming the electrode comprises:
Wherein the polymer material is removed using an organic solvent or a reactive ion etching method.
Wherein forming the electrode comprises:
And forming a transparent conductive layer on the nanomaterial. ≪ RTI ID = 0.0 > 8. < / RTI >
Wherein the transparent conductive layer comprises graphene, graphite, and carbon nanotubes.
Wherein the step of spinning the nanofibers in a linear form is performed by applying a voltage in a range of 100 V to 2500 V.
Wherein the nanofibers are aligned and formed,
Moving the integrated substrate at a predetermined moving speed,
Wherein the moving speed is set to be proportional to the diameter of the outer nozzle.
Wherein the moving speed is set to 25 cm / s to 40 cm / s.
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KR20210035385A (en) | 2019-09-23 | 2021-04-01 | 김효성 | method of manufacturing a transparent electrode using electro spinning and transparent electrode manufactured by the method |
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CN106498512B (en) * | 2016-11-24 | 2019-02-15 | 广东工业大学 | A kind of adjustable electrostatic spinning syringe needle and its implementation |
KR102025159B1 (en) * | 2018-01-12 | 2019-09-25 | 박종수 | Electrospinning nozzle device having means for preventing nozzle clogging |
KR102145670B1 (en) * | 2018-10-31 | 2020-08-19 | 전주대학교 산학협력단 | Electrospinning device improving the uniformity of electrospinning of polymer nanomaterials using conductor wires |
KR102176015B1 (en) * | 2019-12-05 | 2020-11-06 | 박종수 | A nozzle block having means for preventing nozzle clogging and electrospinning device having the same |
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EP2477229B1 (en) * | 2007-04-20 | 2021-06-23 | Cambrios Film Solutions Corporation | Composite transparent conductors and methods of forming the same |
KR101197986B1 (en) | 2009-12-24 | 2012-11-05 | 서울대학교산학협력단 | Fabrication of Polyvinyl alcohol/Poly3,4-ethylenedioxythiophenePEDOT coaxial nanofibers and PEDOT nanotubes using vapor deposition polymerization mediated electrospinning and their application as a chemical sensor |
KR101374401B1 (en) * | 2010-10-07 | 2014-03-17 | 포항공과대학교 산학협력단 | Electric field aided robotic nozzle printer and method for fabrication of aligned organic wire patterns |
KR101322688B1 (en) * | 2011-10-24 | 2013-10-30 | 한양대학교 에리카산학협력단 | Preparation method of transparent electroconductive layer using silver nanofiber and transparent electroconductive layer prepared by the same |
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