KR20160044325A - Method of manufacturing stretchable conductor - Google Patents

Abstract

The present invention relates to a method for manufacturing a stretchable conductor including: (A) a step of forming a buffer layer by spraying a zirconium-containing metallic compound and an organic solvent-containing buffer layer-forming solution on at least one surface of a substrate; (B) a step of producing a catalyst precursor compound containing at least one metal selected from a group consisting of iron, cobalt, and nickel and an organic solvent-containing catalyst layer-forming solution; (C) a step of forming a catalyst layer by spraying the catalyst layer-forming solution on the buffer layer; (D) a step of forming a carbon nanotube composite on the catalyst layer; and (E) a step of transferring a vertical alignment carbon nanotube composite to a polymer film by compressing the polymer film on the formed vertical alignment carbon nanotube composite. The present invention obtains high stretchability and little change in resistance and thus is suitable for a display requiring flexibility.

Description

[0001] METHOD OF MANUFACTURING STRETCHABLE CONDUCTOR [0002]

The present invention relates to a method of manufacturing a flexible conductor, and more particularly, to a method of manufacturing a conductor having a relatively small change in resistance even when expanded or contracted.

Carbon nanotubes (CNTs) are carbon structures whose lengths are very long compared to their diameter, with one atomic layer of graphite being cylindrical and dried.

Since CNT is conductive and has high strength and is chemically stable, it is prepared in the form of powder, paste, yarn, thin film or sheet and exhibits excellent characteristics when applied to electric, electronic, electrochemical and energy related devices.

CNT can be divided into two types: a technique to make a powder that does not have a large orientation and a technique to form a vertically oriented shape on a substrate. As a representative technique of making the powder form, there is a fluidized bed chemical vapor deposition method.

In order to produce the vertically aligned CNTs, a thin layer of catalyst material is formed on a silicon or metal substrate having a ceramic buffer layer. The catalyst layer is applied by vacuum coating using sputtering or e-beam, a solution containing a catalyst element And spin coating and dip coating are mainly used as the coating method in the wet coating method.

The vertical orientation CNT can be divided into two types. One is that when a part of the vertically oriented CNT is horizontally pulled in the substrate surface, the surrounding CNTs are collectively connected and can be made into a thin and light transmissive CNT sheet. When the CNTs are rotated, they are made into carbon CNTs CNT (drawable CNT), which can be drawn, and CNT sheets or CNT yarns that can not be drawn.

Drawable CNT is advantageous for application because CNT sheet and CNT thread can be easily made by dry method.

However, in order to manufacture drawable CNTs, the thickness of the buffer layer and the catalyst layer must be thinly and uniformly applied. However, manufacturing costs are high since they are manufactured by a sputtering process requiring high vacuum or a dry process using an e-beam. For example, there have been known examples of successfully producing drawable CNTs by applying amorphous silicon oxide on a stainless metal substrate and applying an iron catalyst layer thereon in high-vacuum (Xavier Lepro et al., &Quot; Spinnable carbon nanotube forests grown on thin, flexible metallic substrates ", CARBON 48 (2010) 3621-3627).

On the other hand, when such a vertically aligned CNT is produced with a stretchable polymer, the polymer can be transformed into electricity by applying a mechanical tensile force, so that it can be applied to a display requiring flexibility.

CNT was prepared by dissolving polyurethane in an organic solvent, immersing the vertically oriented CNT in the solution, and then slowly evaporating the organic solvent to prepare a stretchable polymer-CNT conductive composite using vertically oriented CNTs And CNTs grown on a substrate having a catalyst pattern formed thereon are dry-grown to form a stretchable film (hereinafter, referred to as " stretched film "). Carbon nanotube conductive composite (T. Yamada et al., Stretchable carbon nanotubes strain sensors for human-motion detection, Nature Nanotechnology, 6 (2011) ) 296) is known.

Xavier Lepro et al., &Quot; Spinable carbon nanotube forests grown on thin, flexible metallic substrates ", CARBON 48 (2010, 3621-3627) M.K. Shin et al., &Quot; elastomeric conductive composites based on carbon nanotube forest " Advanced Materials 22 (2010, 2663-2667) T. Yamada et al. &Quot; Stretchable carbon nanotubes strain sensors for human-motion detection " Nature Nanotechnology 6 (2011, 296)

It is an object of the present invention to provide a method of manufacturing a flexible conductor which is excellent in stretchability and whose resistance change is relatively small even when it is stretched or shrunk.

It is an object of the present invention to provide a method for producing a flexible conductor excellent in compatibility with an electrode.

Another object of the present invention is to provide a flexible conductor manufactured according to the above method.

1. A method for forming a buffer layer, comprising: (A) applying a solution for forming a buffer layer containing a metal compound containing zirconium and an organic solvent to at least one side of a substrate to form a buffer layer;

(B) preparing a catalyst layer-forming solution comprising a catalyst precursor compound comprising at least one metal selected from the group consisting of iron, cobalt and nickel and an organic solvent;

(C) applying the solution for forming a catalyst layer on the buffer layer to form a catalyst layer;

(D) forming a vertically aligned carbon nanotube aggregate on the catalyst layer; And

(E) pressing the polymer film on the vertically aligned carbon nanotube aggregate to transfer the vertically aligned carbon nanotube aggregate to the polymer film;

≪ / RTI >

2. The method for producing a stretchable conductor according to 1 above, wherein the metal compound containing zirconium is a metal organic compound containing zirconium, a metal salt containing zirconium, or a mixture thereof.

3. The zirconium-containing metal compound according to claim 1, wherein the zirconium pentanedionate, zirconium acetate, zirconium acrylate, zirconium acetylacetonate and zirconium hydro- Zirconium hydroxide, and at least one selected from the group consisting of zirconium hydroxide.

4. The organic electroluminescent device according to item 1, wherein the organic solvent in steps (A) and (B) is at least one selected from the group consisting of alcohol, acetone, dimethylformamide and n- ≪ / RTI >

5. The method for producing a stretchable conductor according to 1 above, wherein the metal cation concentration of the buffer layer forming solution is 0.01 to 0.2 M.

6. The method of producing a flexible electrical conductor according to 1 above, wherein the step (A) further comprises a heat treatment step after application of the buffer layer forming solution.

7. The method of manufacturing a flexible electrical conductor according to 6 above, wherein the buffer layer formed in the step (A) is a layer comprising amorphous zirconium oxide.

8. The method for producing a stretchable conductor according to 1 above, wherein the catalyst precursor compound is a metal organic compound, a metal salt or a mixture thereof containing at least one metal selected from the group consisting of iron, cobalt and nickel.

9. The catalyst precursor compound according to 1 above, wherein the catalyst precursor compound is selected from the group consisting of pentane dionate, nitrate, sulfate, hydrochloride, acetate and formate containing at least one metal selected from the group consisting of iron, cobalt and nickel Wherein at least one of the first and second conductive wires is at least one of the first and second conductive wires.

10. The method for producing a stretchable conductor according to 1 above, wherein the solution for forming a catalyst layer further comprises a catalyst carrier-supporting compound which is a metal organic compound or a metal salt including aluminum or zirconium.

11. The catalyst carrier for forming a catalyst according to item 10, wherein the catalyst carrier-supporting compound is at least one selected from the group consisting of pentane dionate, nitrate, sulfate, hydrochloride, acetate and formate of aluminum or zirconium .

12. The catalyst precursor composition according to claim 10, wherein the molar ratio of the metal of at least one of iron, cobalt and nickel of the catalyst precursor compound to the aluminum or zirconium of the catalyst carrier-forming compound is 1: 5 to 5: A method of manufacturing a flexible conductor.

13. The method for producing a stretchable conductor according to 1 above, wherein the metal cation concentration of said catalyst layer forming solution is 0.01 to 0.2 M.

14. The method of producing a flexible electrical conductor according to 1 above, wherein said step (C) further comprises a heat treatment step after application of a solution for forming a catalyst layer.

15. The method for producing a stretchable conductor according to 1 above, wherein the application of the buffer layer forming solution and the catalyst layer forming solution in the steps (A) and (C) is performed by a wet method.

16. The method for producing a stretchable conductor according to 15 above, wherein the wet method is a spin coating method or a dip coating method.

17. The method of producing a flexible electrical conductor according to item 1 above, wherein step (D) is performed by chemical vapor deposition.

18. The method of producing a carbon nanotube as set forth in claim 1, wherein before step (E), a metal foil is coated on both ends of the vertically-oriented carbon nanotube aggregate formed in step (D) so that a part of the metal foil is formed on the carbon nanotube aggregate ≪ / RTI > further comprising the step of:

 19. The method for producing a stretchable conductor according to 1 above, wherein the polymer film has elasticity.

20. The method for producing a stretchable conductor according to 1 above, wherein the modulus of elasticity of the polymer film is 20 to 200.

21. The method for producing a stretchable conductor according to 1 above, wherein the polymer film has a thickness of 10 mu m to 50,000 mu m.

22. The process for producing a stretchable conductor according to 1 above, wherein the polymer film is at least one selected from the group consisting of polyurethane, polymethyl methacrylate, latex and polymethylsiloxane.

23. The method for producing a stretchable conductor according to 1 above, wherein the polymer film is a pre-stretched film.

24. A stretchable conductor produced by the method of any one of claims 1 to 23 above.

The production method of the present invention is suitable for use in a display in which a vertically oriented carbon nanotube aggregate is pressed and transferred to a polymer film to form a conductor having excellent stretchability and flexibility is relatively small even when stretched .

The manufacturing method of the present invention is advantageous in that a metal current terminal can be formed at the same time as a process of pressing a polymer film and can be used as an electrode without any additional process.

1 is a scanning electron micrograph of a vertically aligned CNT aggregate prepared according to Example 1. Fig.
2 is a photograph showing each step of the manufacturing method according to an embodiment of the present invention.
3 is a graph showing the resistance change when the CNT / Latex stretchable conductor manufactured according to Example 1 is repeatedly stretched and shrunk.
4 is a comparative photograph of a CNT / Latex stretchable conductor obtained by bonding a vertically-oriented CNT aggregate before transfer and a metal foil prepared according to Example 2 and transferring a vertically-oriented CNT aggregate to a line-stretched latex.
5 is a graph showing resistance change values according to elongation ratios of the stretchable conductors manufactured according to Example 1. Fig.

(A) applying a buffer layer-forming solution containing a zirconium-containing metal compound and an organic solvent to at least one surface of a substrate to form a buffer layer; (B) preparing a catalyst layer-forming solution comprising a catalyst precursor compound comprising at least one metal selected from the group consisting of iron, cobalt and nickel and an organic solvent; (C) applying the solution for forming a catalyst layer on the buffer layer to form a catalyst layer; (D) forming a vertically aligned carbon nanotube aggregate on the catalyst layer; And (E) compressing the polymer film to the vertically-aligned carbon nanotube aggregate so as to transfer the vertically-oriented carbon nanotube aggregate to the polymer film. Thus, To a method of making a flexible conductor suitable for use in a desired display.

Hereinafter, one embodiment of the manufacturing method of the present invention will be described in more detail.

First, a buffer layer forming solution containing a zirconium-containing metal compound and an organic solvent is applied to at least one surface of a substrate to form a buffer layer (step (A)).

The substrate can be used without particular limitation as long as it has durability to withstand the formation of the buffer layer, the catalyst layer and the carbon nanotube aggregate, and it is preferable that the substrate can maintain its shape even at a high temperature of about 800 ° C.

Examples of such substrates include glass, polymers, and organic and inorganic thin films and metals. Specific examples thereof include polymers, silicon, quartz, glass, mica, graphite, diamond, ceramic, iron, nickel, chromium, molybdenum, tungsten The metal may be a metal alone or an oxide, an alloy of two or more types, or a combination of two or more of the above metals. The metal may be selected from the group consisting of titanium, aluminum, manganese, cobalt, copper, silver, gold, platinum, niobium, tantalum, lead, . In the case of applying to a roll-to-roll process or the like, a metal thin film can be used since it is preferably flexible.

The metal compound containing zirconium contained in the buffer layer-forming solution is a main component for forming a buffer layer. The buffer layer is formed stably through a wet process, and the vertically-aligned carbon nanotubes formed later can be horizontally drawn.

Metal organic compounds including zirconium, metal salts including zirconium, and mixtures thereof. More specifically, zirconium pentanedionate, zirconium acetate, zirconium acrylate, zirconium acrylate, At least one selected from the group consisting of zirconium acetylacetonate and zirconium hydroxide is exemplified.

The organic solvent is not particularly limited as long as it is an organic solvent capable of dissolving / dispersing a metal compound including zirconium. Examples of the organic solvent include alcohols, acetone, dimethylformamide, n-methylpyrrolidone, etc., Can be mixed and used.

The metal cation concentration of the buffer layer forming solution is preferably 0.01 to 0.2M. Within this concentration, the buffer layer may be formed to have an appropriate thickness. The thickness of the buffer layer is preferably 2 to 30 nm. The thickness of the buffer layer can be controlled by controlling the application speed, the number of application times, etc. in addition to the concentration of the buffer layer forming solution.

The buffer layer according to the present invention is formed through a wet process in which the above-mentioned buffer layer forming solution is applied to a substrate. The method of applying the buffer layer forming solution to the substrate is not particularly limited as long as it is a wet coating process known in the art, and examples thereof include, but are not limited to, a spin coating method or a dip coating method.

After the solution for forming the buffer layer is applied to the substrate, a buffer layer is formed through natural drying or a heat treatment process for applying a predetermined heat.

When the heat treatment is performed, the metal compound including zirconium is thermally decomposed and the buffer layer contains amorphous zirconium oxide, which is more preferable in view of the productivity of the carbon nanotube and the stability of the buffer layer. The condition of the heat treatment is not particularly limited as long as it can produce an amorphous zirconium oxide, and can be carried out at a temperature of, for example, 250 to 500 DEG C for 5 to 30 minutes.

Next, a solution for forming a catalyst layer containing a catalyst precursor compound including at least one metal selected from the group consisting of iron, cobalt and nickel and an organic solvent is prepared (step (B)).

The catalyst precursor compound forms a catalyst for growing vertically aligned carbon nanotubes. In the present invention, a metal organic compound, a metal salt, or a mixture thereof containing at least one metal selected from the group consisting of iron, cobalt and nickel is used .

More specific examples of the catalyst precursor compound include pentane dionate, nitrate, sulfate, hydrochloride, acetate, and formate salts containing at least one metal selected from the group consisting of iron, cobalt and nickel, More than a species can be used.

The organic solvent is not particularly limited as long as it is an organic solvent capable of dissolving / dispersing the catalyst precursor compound, and examples thereof include alcohols, acetone, dimethylformamide, n-methylpyrrolidone, etc., .

Optionally, the catalyst layer-forming solution may further comprise a catalyst carrier-forming compound, which is a metal organic compound or metal salt including aluminum or zirconium. The catalyst carrier may prevent the catalyst from aggregating and promote uniform dispersion, and thus may be more preferable for uniform growth of the vertically-aligned carbon nanotubes.

More specific examples of the catalyst carrier-forming compound include aluminum, zirconium pentanedionate, nitrate, sulfate, hydrochloride, acetate and formate, each of which may be used singly or as a mixture of two or more thereof.

In the case of using the catalyst carrier according to the present invention, the molar ratio of the metal of at least one of iron, cobalt and nickel of the catalyst precursor compound to the aluminum or zirconium of the catalyst carrier- 5: 1. In this range, dispersion of the catalyst can be most effectively performed.

The metal cation concentration of the catalyst layer-forming solution is preferably 0.01 to 0.2M. Within this concentration, the catalyst layer may be formed to have an appropriate thickness. In this case, the metal cation includes both the metal of the catalyst precursor compound and the metal of the catalyst carrier. The thickness of the catalyst layer is preferably 2 to 30 nm. The thickness of the catalyst layer can be controlled by controlling the application speed, the number of times of application, etc., in addition to the concentration of the catalyst layer forming solution.

Next, the catalyst layer forming solution is applied on the buffer layer to form a catalyst layer (step (C)).

The catalyst layer according to the present invention is formed through a wet process in which the above-described solution for forming a catalyst layer is applied on the buffer layer in the same manner as the buffer layer. There is no particular limitation on the applicable wet coating process, and examples thereof include, but not limited to, a spin coating method or a dip coating method.

After the solution for forming the catalyst layer is applied on the buffer layer, the catalyst layer is formed through natural drying or a heat treatment process for applying a predetermined heat.

It may be preferable to perform the heat treatment in consideration of the catalyst layer formation time, efficiency, stability of the catalyst layer, and the like. The conditions of the heat treatment are not particularly limited, but may be carried out at a temperature of, for example, 100 to 800 ° C for 5 to 30 minutes.

Next, a vertically-oriented carbon nanotube aggregate is formed on the catalyst layer (step (D)).

The method of forming the vertically aligned carbon nanotube aggregate on the catalyst layer may be a method known in the art without any particular limitation, and preferably a chemical vapor deposition method can be used.

Taking the chemical vapor deposition method as an example, a vertically-oriented carbon nanotube aggregate can be obtained by injecting a substrate formed up to the catalyst layer into a carbon nanotube growth furnace. As the carbon nanotube growth, acetylene or ethylene gas is used as a carbon source , Nitrogen or argon gas is used as a carrier gas, and hydrogen is used as a catalyst reducing gas.

When the substrate is placed in a portion of the growth furnace and heated to 730 to 830 캜 while flowing the gas, a vertically aligned carbon nanotube aggregate can be produced. The heating rate can be performed at 40 to 700 占 폚 per minute.

Next, the polymer film is pressed on the vertically-aligned carbon nanotube aggregate thus formed to transfer the vertically-oriented carbon nanotube aggregate to the polymer film (step (E)).

The polymer film may be formed of a stretchable polymer. In this step, a vertically oriented carbon nanotube aggregate may be pressed and transferred to a stretchable polymer film to produce a conductor having excellent stretchability.

The polymer film used in the present invention can be used without any particular limitation as long as it has stretchability. For example, the modulus of elasticity of the polymer film according to the present invention may be 20 to 200, preferably 50 to 100, but is not limited thereto. When the elastic modulus is in the above range, the conductor produced according to the present invention can exhibit excellent stretchability.

The polymer film can be used without any particular limitation as long as it has elasticity and carbon nanotubes can be easily transferred. Specific examples thereof include polyurethane, polymethyl methacrylate, latex, and polymethylsiloxane. However, But is not limited thereto.

The thickness of the polymer film may be 10 탆 to 50,000 탆, preferably 100 탆 to 20,000 탆, and more preferably 100 탆 to 1,000 탆, but is not limited thereto.

The process of pressing the vertically aligned carbon nanotube aggregate and the polymer film is not particularly limited as long as the polymer film is brought into contact with the vertically oriented carbon nanotube aggregate and then subjected to physical pressure. Is transferred.

The vertically-oriented carbon nanotube aggregate of the present invention has a higher Van der Waals force than a polymer film formed by compression bonding rather than adhesion with a catalyst layer, and thus can be easily transferred to a polymer film.

For example, a polymer film is placed on a vertically-oriented carbon nanotube aggregate, and the aggregate and the polymer film are squeezed through a rotating body (compression roller) having a circular cross section . The vertically aligned carbon nanotube aggregate and the polymer film can be attached to each other without a separate adhesive by van der Waals force generated in the pressing process.

The carbon nanotubes may be transferred onto the polymer film at the same time as the compression bonding to form the stretchable carbon nanotube-polymer conductors.

According to another embodiment of the present invention, before the step (E), a step of bonding the vertically-aligned carbon nanotube aggregate formed in step (D) to the metal foil may be further performed (step (E-1) .

Specifically, the step (E-1) may be performed such that a metal foil is coated on both ends of the vertically aligned carbon nanotube aggregate formed in step (D), and a part of the metal foil is formed on the CNT assembly And the bonded metal foil functions as a metal current terminal.

Particularly, a part of the metal foil may be formed on the carbon nanotube aggregate and the other part may be formed on the outside of the carbon nanotube aggregate. When the metal foil is formed in the structure, So that it can serve as a metal current terminal of the flexible conductor.

The metal foil can be used without limitation, provided that it is a metal suitable for use as a current terminal, and examples thereof include aluminum and copper.

 The thickness of the metal foil is not particularly limited as long as it is within a range suitable for use as a current terminal. For example, it may be 5 to 50 占 퐉, preferably 10 to 30 占 퐉.

When ((E-1) step) is further carried out for the step of bonding with the metal foil before the step of pressing the polymer film in the present invention, the vertically-aligned carbon nanotubes, the metal foil and the polymer film are sequentially laminated A pressing process can be performed.

According to another embodiment of the present invention, the polymer film may be pre-stretched before being compressed with the carbon nanotubes. When a linear-stretched polymer film is used, the mechanical properties of the stretchable conductor can be improved.

Further, in the case of using a pre-stretched polymer film, the maximum elongation which can exhibit effective conductivity of the stretchable conductor is a sum of elongations of the pre-stretched polymer film.

The stretchable conductor of the present invention produced through the above-described production method has excellent conductivity even when stretched because it has stretchability.

The stretching ratio of the stretchable and contractible conductor is not particularly limited as it may have various values depending on the kind of the polymer film and the thickness of the carbon nanotube layer. For example, it may be 300% or less, preferably 200% or less. It is judged that the stretchable conductor according to the present invention is suitable for use as a stretchable electrode because the change in resistance is relatively small even when stretched within the above range.

Also, the stretchable conductor manufactured according to the above-described manufacturing method can be used as an electrode that has relatively high electrical conductivity even when elongated and contracted and is required to have flexibility. For example, it is very useful for a display (flexible display) .

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the invention and are not intended to limit the scope of the claims. It will be apparent to those skilled in the art that such variations and modifications are within the scope of the appended claims.

Example 1

Zirconium acetate was dissolved in a 200 cc solution of methyl alcohol so that the metal cation concentration was 0.09 mole. An STS 304 stainless steel thin film having a thickness of 100 탆 was immersed in the solution and held for 5 seconds, and then pulled up at a temperature of 25 캜 at a room temperature of 6 cm / min. After the application, the substrate was heat-treated at 300 ° C for 10 minutes and then cooled to room temperature to prepare a metal substrate coated with the buffer layer. In the heat-treated substrate, the buffer layer applied on the surface was stable even after several months.

Next, aluminum pentane dionate and cobalt nitrate were weighed so that the atomic ratio of aluminum to cobalt was 1: 2 and dissolved in ethyl alcohol to a metal cation concentration of 0.05 mole to prepare a catalyst layer forming solution. The stainless steel substrate coated with the buffer layer at room temperature of 25 ° C was immersed in the solution for forming a catalyst layer and held for 5 seconds and then pulled up at a rate of 6 cm / min at 25 ° C using a dip coater. After the application, the substrate was heat-treated at 300 ° C for 10 minutes and then cooled to room temperature to prepare a metal substrate having a catalyst layer formed thereon. After the heat treatment, the catalyst layer applied on the surface was stable even after several months.

After the substrate coated with the catalyst layer was placed at the center of the growth furnace having an inner diameter of 5 cm at room temperature, the growth furnace was heated to 750 캜 for 2 minutes while introducing 450 sccm of argon gas, 10 sccm of hydrogen gas and 120 sccm of ethylene gas simultaneously. For 5 minutes. Then, the atmosphere in the growth furnace was changed to argon, and then cooled to room temperature to prepare a vertically aligned CNT aggregate (1 in Fig. 2). A scanning electron microscope (SEM) image of the CNT thus prepared is shown in FIG.

The (1,000) 탆 Latex film was placed on the vertically-oriented CNT aggregate thus prepared (② and ③ in FIG. 2) and passed between rubber rollers (④ in FIG. 2) to transfer the vertically oriented CNT onto the latex film ⑤) CNT / latex aggregates were prepared (⑥ in FIG. 2).

2 is a photograph of the CNT / Latex stretchable conductor manufactured in the above step.

Example  2

An aluminum foil of 20 탆 was covered on both ends of the vertically aligned CNT aggregate prepared in the same manner as in Example 1, the latex used in Example 1 was linearly stretched by 200%, and then placed on the CNT aggregate. CNT / Latex stretchable conductors were prepared in the same manner as in (1).

4 is a comparative photograph of the CNT aggregate before transfer and the CNT / Latex stretch conductor prepared according to the above step.

Test Methods

(1) Repeat Stretching - resistance change due to shrinkage

The CNT / latex stretchable conductor produced according to Example 1 was subjected to stretching and shrinking (elongation and shrinkage repeatedly) at an elongation of 44.5%, and the resistance was measured. The results are shown in Fig.

Referring to FIG. 3, it was confirmed that the CNT / Latex flexible conductor manufactured according to the present invention satisfied the physical properties required for a stretchable electrode with a resistance change rate of about three times.

(2) In elongation  Resistance change due to

The resistance change was measured while increasing the elongation of the CNT / Latex flexible conductor manufactured according to Example 1, and the results are shown in FIG.

Referring to FIG. 5, it was confirmed that the CNT / Latex stretchable conductor manufactured according to the present invention has a smaller rate of increase in resistance to elongation than that of conventional stretchable conductors, and satisfies the physical properties required for the stretchable electrode.

Claims (24)

(A) applying a solution for forming a buffer layer containing a metal compound containing zirconium and an organic solvent to at least one side of a substrate to form a buffer layer;
(B) preparing a catalyst layer-forming solution comprising a catalyst precursor compound comprising at least one metal selected from the group consisting of iron, cobalt and nickel and an organic solvent;
(C) applying the solution for forming a catalyst layer on the buffer layer to form a catalyst layer;
(D) forming a vertically aligned carbon nanotube aggregate on the catalyst layer; And
(E) pressing the polymer film on the vertically aligned carbon nanotube aggregate to transfer the vertically aligned carbon nanotube aggregate to the polymer film;
≪ / RTI >
The method according to claim 1, wherein the metal compound containing zirconium is a metal organic compound containing zirconium, a metal salt containing zirconium, or a mixture thereof.
The method of claim 1, wherein the metal compound comprising zirconium is selected from the group consisting of zirconium pentanedionate, zirconium acetate, zirconium acrylate, zirconium acetylacetonate and zirconium hydroxide zirconium hydroxide, and zirconium hydroxide.
The method according to claim 1, wherein the organic solvent in steps (A) and (B) is at least one selected from the group consisting of alcohols, acetone, dimethylformamide and n-methylpyrrolidone, Way.
The method of manufacturing a flexible conductor according to claim 1, wherein the concentration of the metal cation in the buffer layer forming solution is 0.01 to 0.2M.
The method of manufacturing a flexible conductor according to claim 1, wherein the step (A) further comprises a heat treatment step after application of the buffer layer forming solution.
7. The method according to claim 6, wherein the buffer layer formed in step (A) is a layer comprising amorphous zirconium oxide.
The method of claim 1, wherein the catalyst precursor compound is a metal organic compound, a metal salt, or a mixture thereof, comprising at least one metal selected from the group consisting of iron, cobalt, and nickel.
The catalyst precursor compound according to claim 1, wherein the catalyst precursor compound is at least one selected from the group consisting of pentane dionate, nitrate, sulfate, hydrochloride, acetate and formate containing at least one metal selected from the group consisting of iron, cobalt and nickel Lt; RTI ID = 0.0 > a < / RTI > stretchable conductor.
The method according to claim 1, wherein the solution for forming a catalyst layer further comprises a catalyst carrier-supporting compound, which is a metal organic compound or a metal salt including aluminum or zirconium.
11. The method according to claim 10, wherein the catalyst carrier-supporting compound is at least one selected from the group consisting of aluminum or zirconium pentanedionate, nitrate, sulfate, hydrochloride, acetate and formate.
[Claim 10] The method according to claim 10, wherein the molar ratio of the metal of at least one of iron, cobalt and nickel of the catalyst precursor compound to aluminum or zirconium of the catalyst carrier-forming compound is 1: 5 to 5: ≪ / RTI >
The method according to claim 1, wherein the metal cation concentration of the solution for forming a catalyst layer is 0.01 to 0.2M.
[2] The method of manufacturing a flexible conductor according to claim 1, wherein the step (C) further comprises a heat treatment step after application of the catalyst layer forming solution.
The method according to claim 1, wherein the application of the solution for forming the buffer layer and the solution for forming the catalyst layer in the step (A) and the step (C) is carried out by a wet method.
16. The method according to claim 15, wherein the wet method is a spin coating method or a dip coating method.
The method according to claim 1, wherein step (D) is performed by chemical vapor deposition.
[6] The method of claim 1, wherein before step (E), a metal foil is coated on both ends of the vertically-oriented carbon nanotube aggregate formed in step (D) so that a part of the metal foil is formed on the carbon nanotube conjugate ≪ / RTI >
The method according to claim 1, wherein the polymer film is stretchable.
The method according to claim 1, wherein the modulus of elasticity of the polymer film is 50 to 100.
The method of manufacturing a flexible electrical conductor according to claim 1, wherein the polymer film has a thickness of 10 mu m to 50,000 mu m.
The method according to claim 1, wherein the polymer film is at least one selected from the group consisting of polyurethane, polymethyl methacrylate, latex and polysiloxane.
The method according to claim 1, wherein the polymer film is a pre-stretched film.
24. A stretchable conductor produced by the method of any one of claims 1-23.

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