KR20160037272A - Nano carbon composite ink materials used for stretchable nano carbon electrode, stretchable nano carbon electrode using the nano carbon composite ink materials, and method for manufacturing the nano carbon electrode - Google Patents

Nano carbon composite ink materials used for stretchable nano carbon electrode, stretchable nano carbon electrode using the nano carbon composite ink materials, and method for manufacturing the nano carbon electrode Download PDF

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KR20160037272A
KR20160037272A KR1020140128886A KR20140128886A KR20160037272A KR 20160037272 A KR20160037272 A KR 20160037272A KR 1020140128886 A KR1020140128886 A KR 1020140128886A KR 20140128886 A KR20140128886 A KR 20140128886A KR 20160037272 A KR20160037272 A KR 20160037272A
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South Korea
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conductive carbon
nano carbon
nanostructure
carbon
electrode
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KR1020140128886A
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Korean (ko)
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박형호
이태원
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연세대학교 산학협력단
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Publication of KR20160037272A publication Critical patent/KR20160037272A/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/52—Electrically conductive inks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

The present invention provides a carbon nano-electrode easily and variably deformed in accordance with the physical deformation of an electrode such as bending or extension, maintaining flexibility and elasticity after the transformation, preventing a rapid decrease in electric conductivity or a rapid increase in electric conductivity of the electrode, and having excellent reliability. A nano-carbon ink material according to the present invention comprises a conductive carbon particle, a conductive carbon nanostructure, a binder, and a solvent, wherein the conductive carbon nano-structure is at least one among a carbon nano-tube and graphene, and the conductive carbon particle is composed of carbon black.

Description

TECHNICAL FIELD [0001] The present invention relates to a nano-carbon ink material, a stretchable nano carbon electrode using the nano-carbon ink material, and a method of manufacturing the stretchable nano carbon electrode. nano carbon electrode}

The present invention relates to a nano-carbon ink material used for a stretchable nano-carbon electrode, and a stretchable nano-carbon electrode using the nano-carbon ink material and a method for manufacturing the same.

Apart from existing performance-oriented silicon-based devices, the paradigm of electronic products is changing with human-friendly and soft electronics, and research is expanding to various fields ranging from wearable devices, flexible display / mobile, and electronic skin. However, in order to commercialize it, it is necessary to develop a device in which electric characteristics are maintained in various physical distortions such as bend, twist, and stretch.

Among these, stretchable electrodes with the highest technical difficulty can be widely applied as flexible electronic devices, and related researches are actively under way.

The elastic electrode can be formed by first making a rigid silicon material such as nano-sized wavy or buckle shape to control the external strain to a small extent There is a way to be affected. In this case, however, the process is complicated and vulnerable to large physical deformation.

Next, there is a method of making elastic electrodes by adding conductive particles to an elastic polymer such as an elastomer or PDMS. Materials to be added include carbon black, metal-based nanostructured materials (wires, thin films, nanoparticles, etc.), conductive polymers, carbon nanotubes, and graphene. Among them, carbon black has a high resistance to being used as an electronic device, a conductive polymer is not stable, and metal and carbon nanostructured materials are expensive. In addition, the process of adding conductive particles is also complicated and the experiment is conducted in laboratory, which makes it difficult to mass-produce and commercialize the particles.

In order to solve this problem, there is a growing interest in electrode forming technology using carbon or nano metal. Particularly, in order to use as flexible electronic parts such as a wearable device capable of collecting various information by wearing on the body and clothes, elasticity is required to be formed on the upper and lower sides of the flexible or flexible substrate, It is urgent to develop a polymer-based actuator having excellent electrical properties while maintaining elasticity.

As is known, an actuator refers to a device in which electrical energy and mechanical work is transformed at a macroscopic or microscopic level, and polymer-based electromechanical actuators have been studied for decades. For example, a conductive oxide such as ITO (Indium Tin Oxide), conductive particles such as metal particles, a conductive polymer, or the like is used as an electrode material of an actuator. However, when the conductive particles are formed by conductive particles, It is disadvantageous in that the electrode is deteriorated and the sheet resistance of the electrode itself is high. In the case of forming the film with the conductive oxide, the flexibility of the electrode is inferior and the high temperature process is performed, There is a problem that the base actuator itself is thermally deformed.

Therefore, it is an object of the present invention to provide a carbon ink which is easy to be deformed variously against physical deformation of electrodes such as bending or elongation, and which is capable of preventing the abrupt electrical conductivity drop or rapid increase of electrical resistance, And a stretchable nano-carbon electrode using the same.

In order to achieve the above object, the present invention provides a nano-carbon ink material comprising conductive carbon particles, a conductive carbon nanostructure, a binder, a surfactant, and a solvent, wherein the binder is an aqueous acrylic or urethane binder.

The conductive carbon nanostructure may be at least one of carbon nanotubes and graphene.

The conductive carbon particles are preferably carbon black.

Further, the solvent is preferably H 2 O.

It is preferable that the conductive carbon nanostructure is included in an amount of 0.001 wt% to 10 wt% with respect to 100 wt% of the conductive carbon particles.

Alternatively, the conductive carbon nanostructure may be included in an amount of 0.2 wt% to 2 wt% based on 100 wt% of the conductive carbon particles.

According to another aspect of the present invention, there is provided a method of manufacturing a nano-carbon ink material,

Forming a mixture of a surfactant and a solvent;

Adding conductive carbon particles and a conductive carbon nanostructure to a mixture of the surfactant and a solvent;

Dispersing the conductive carbon particles and the conductive carbon nanostructure in the mixed solution by stirring the conductive carbon particles and the conductive carbon nanostructure;

Adding an aqueous binder to a solution in which the conductive carbon particles and the conductive carbon nanostructure are dispersed;

And stirring the solution to which the aqueous binder is added.

The conductive carbon nanostructure may be at least one of carbon nanotubes and graphene.

The conductive carbon particles are preferably carbon black.

It is preferable that the conductive carbon nanostructure is included in an amount of 0.001 wt% to 10 wt% with respect to 100 wt% of the conductive carbon particles.

Alternatively, the conductive carbon nanostructure may be included in an amount of 0.2 wt% to 2 wt% based on 100 wt% of the conductive carbon particles.

A method of manufacturing a nano-carbon electrode according to a preferred embodiment of the present invention includes:

Forming a mixture of a surfactant and a solvent;

Adding conductive carbon particles and a conductive carbon nanostructure to a mixture of the surfactant and a solvent;

Dispersing the conductive carbon particles and the conductive carbon nanostructure in the mixed solution by stirring the conductive carbon particles and the conductive carbon nanostructure;

Adding an aqueous binder to a solution in which the conductive carbon particles and the conductive carbon nanostructure are dispersed;

Stirring the solution to which the aqueous binder is added;

Applying the agitated solution to at least one surface of the electrode-forming base material;

And drying the applied solution.

In addition, it is preferable that the step of applying the dispersion solution is provided by a screen printing method or a spray coating method.

According to another aspect of the present invention, there is provided a method of manufacturing a nano-carbon electrode.

The nano-carbon ink material according to the present invention or the nano-carbon electrode including the nano-carbon ink material can easily be modified in various ways against physical deformation of the electrode, such as flexure or elongation. It has excellent properties as a stretchable electrode material because it prevents the decrease of conductivity or the increase of electrical resistance rapidly and the reliability is excellent.

1 is a flow diagram schematically illustrating a process of forming a nano-carbon ink material and a nano-carbon electrode according to a preferred embodiment of the present invention;
2 is a SEM image of a nanocarbon electrode formed according to a preferred embodiment of the present invention; And
FIG. 3 is a view showing movement of CNTs when a nano-carbon electrode according to a preferred embodiment of the present invention is stretched.

A method of manufacturing a stretchable nano-carbon ink material and a nano-carbon electrode according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flow diagram schematically illustrating a process of forming a fabric electrode according to a preferred embodiment of the present invention.

As shown in FIGS. 1 and 2, a mixed solution of a surfactant and a solvent is formed. According to a preferred embodiment of the present invention, SDS (sodium dodecyl sulfate) is used as a surfactant and DI water is used as a solvent. However, the present invention is not limited thereto. Then, carbon black is added as a conductive carbon particle and CNT is added as a conductive carbon nanostructure to a mixture of a surfactant and a solvent. According to this embodiment, 1 g of carbon black and 0.1 g of CNT were added to a solution of 0.8928 g of SDS and 200 ml of deionized water

Then, the CNT and the carbon black-introduced solution are stirred to disperse the CNT and the carbon black. According to this embodiment, the carbon black and the CNT-introduced solution were stirred at a speed of about 300 rpm for 20 minutes, and ultrasonic pulverization was then performed so that dispersion was performed well.

Next, an aqueous binder is added to a solution in which carbon black and CNT are dispersed to form an aqueous nano-carbon ink, and the aqueous solution containing the aqueous binder is heated and stirred to form an aqueous carbon ink.

Subsequently, the aqueous carbon ink is applied to at least one surface of the substrate for electrode formation, and the coated solution is dried to form a nano-carbon electrode. According to this embodiment, although the screen printing method is used for applying the dispersion solution, it is not necessarily limited to the screen printing method, and the type of the dispersing solution is not particularly limited as long as it is a method of dispersing materials such as paste . The nano-carbon electrode is then completed by drying the dispersed mixture.

2 is a SEM image of a nano-carbon electrode formed according to a preferred embodiment of the present invention. As shown in FIGS. 2 (a) and 2 (b), it can be seen that CNTs having a long diameter-to-length ratio are widened by a gap created by the tension of the carbon electrode. Generally, when a hollow space is formed in the carbon electrode, the conductive path through which the electrons move is damaged, thereby deteriorating the electrical characteristics. However, in the electrode in which the CNT according to the preferred embodiment of the present invention is appropriately dispersed, Since the long CNTs rotate in the tensile direction, the damaged conductive path is complemented and the deterioration of the electric conductivity is also minimized.

FIG. 3 is a schematic view showing a mode in which a nano-carbon electrode according to a preferred embodiment of the present invention is rotated in a tensile direction of a CNT having a large diameter-to-length ratio in an electrode. As shown in FIG. 3, a CNT having a short length forms a contact point by rotating when a tensile length is small, and a CNT having a long length forms a contact point by rotating when a tensile length is long. When the CNT is dispersed in the electrode, the increase in the contact point between the CNTs due to the rotation during the electrode tension minimizes the increase in resistance.

The nano-carbon ink material used for the stretchable nano-carbon electrode according to the preferred embodiment of the present invention, the stretchable nano-carbon electrode using the nano-carbon ink material, and the method for manufacturing the same are described in detail below with reference to the accompanying drawings . However, it will be understood by those skilled in the art that various modifications and variations can be made in the present invention. Accordingly, the scope of the present invention is limited only by the scope of the following claims.

Claims (13)

Wherein the conductive carbon nanostructure comprises conductive carbon particles, a conductive carbon nanostructure, a binder, a surfactant and a solvent, wherein the binder is an aqueous acrylic or urethane binder. The conductive carbon nanostructure according to claim 1, wherein the conductive carbon nanostructure is at least one of carbon nanotubes and graphenes. The conductive carbon nanostructure according to claim 1, wherein the conductive carbon particles are carbon black. The conductive carbon nanostructure according to claim 1, wherein the solvent is H 2 O. [Claim 2] The conductive carbon nanostructure according to claim 1, wherein the conductive carbon nanostructure is contained in an amount of 0.001 wt% to 10 wt% based on 100 wt% of the conductive carbon particles. [Claim 6] The conductive carbon nanostructure according to claim 5, wherein the conductive carbon nanostructure is contained in an amount of 0.2 wt% to 2 wt% based on 100 wt% of the conductive carbon particles. Forming a mixture of a surfactant and a solvent;
Adding conductive carbon particles and a conductive carbon nanostructure to a mixture of the surfactant and a solvent;
Dispersing the conductive carbon particles and the conductive carbon nanostructure in the mixed solution by stirring the conductive carbon particles and the conductive carbon nanostructure;
Adding an aqueous binder to a solution in which the conductive carbon particles and the conductive carbon nanostructure are dispersed; And
And stirring the solution to which the aqueous binder is added. [Claim 7] The method according to claim 7, wherein the conductive carbon nanostructure is at least one of carbon nanotubes and graphenes. The method of manufacturing a carbon nano ink material according to claim 7, wherein the conductive carbon particles are carbon black. [Claim 7] The method according to claim 7, wherein the conductive carbon nanostructure is contained in an amount of 0.001 wt% to 10 wt% based on 100 wt% of the conductive carbon particles. [Claim 11] The method of claim 10, wherein the conductive carbon nanostructure is contained in an amount of 0.2 wt% to 2 wt% based on 100 wt% of the conductive carbon particles. Forming a mixture of a surfactant and a solvent;
Adding conductive carbon particles and a conductive carbon nanostructure to a mixture of the surfactant and a solvent;
Dispersing the conductive carbon particles and the conductive carbon nanostructure in the mixed solution by stirring the conductive carbon particles and the conductive carbon nanostructure;
Adding an aqueous binder to a solution in which the conductive carbon particles and the conductive carbon nanostructure are dispersed;
Stirring the solution to which the aqueous binder is added;
Applying the agitated solution to at least one surface of the electrode-forming base material; And
And drying the applied solution. The method of manufacturing a carbon nanotube according to claim 1, [14] The method of claim 12, wherein the step of applying the dispersion solution is provided by a screen printing method or a spray coating method.
KR1020140128886A 2014-09-26 2014-09-26 Nano carbon composite ink materials used for stretchable nano carbon electrode, stretchable nano carbon electrode using the nano carbon composite ink materials, and method for manufacturing the nano carbon electrode KR20160037272A (en)

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN107949081A (en) * 2017-11-20 2018-04-20 北京石油化工学院 A kind of preparation method of the controllable graphene thermo electric material of electric heating property
WO2018088738A1 (en) * 2016-11-10 2018-05-17 주식회사 엘지화학 Conductive film, and manufacturing method therefor
KR20210030513A (en) * 2017-02-09 2021-03-17 라이텐, 인코포레이티드 Seedless particles with carbon allotropes
TWI738329B (en) * 2020-05-11 2021-09-01 臻鼎科技股份有限公司 Conductive ink and conductive element with tensile property
CN116355463A (en) * 2023-04-12 2023-06-30 湖北龙腾电子科技股份有限公司 Carbon-based water-based high-temperature-resistant soldering ink as well as preparation method and application thereof
CN117025026A (en) * 2023-09-11 2023-11-10 青岛亚坦文具有限公司 Preparation method of inkjet ink

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018088738A1 (en) * 2016-11-10 2018-05-17 주식회사 엘지화학 Conductive film, and manufacturing method therefor
CN109803819A (en) * 2016-11-10 2019-05-24 株式会社Lg化学 Conductive film and preparation method thereof
US11117349B2 (en) 2016-11-10 2021-09-14 Lg Chem, Ltd. Conductive film, and method for preparing the same
KR20210030513A (en) * 2017-02-09 2021-03-17 라이텐, 인코포레이티드 Seedless particles with carbon allotropes
CN107949081A (en) * 2017-11-20 2018-04-20 北京石油化工学院 A kind of preparation method of the controllable graphene thermo electric material of electric heating property
TWI738329B (en) * 2020-05-11 2021-09-01 臻鼎科技股份有限公司 Conductive ink and conductive element with tensile property
CN116355463A (en) * 2023-04-12 2023-06-30 湖北龙腾电子科技股份有限公司 Carbon-based water-based high-temperature-resistant soldering ink as well as preparation method and application thereof
CN117025026A (en) * 2023-09-11 2023-11-10 青岛亚坦文具有限公司 Preparation method of inkjet ink
CN117025026B (en) * 2023-09-11 2024-04-02 青岛亚坦文具有限公司 Preparation method of inkjet ink

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