KR101455379B1 - Carbon nanotube functional product having improved light transmittance, method thereof, clothes manufactured of the Carbon nanotube functional product, and bed clothes manufactured of the Carbon nanotube functional product - Google Patents

Abstract

A carbon nanotube light-emitting functional product comprising a carbon nanotube (CNT), a dispersant, a resin binder, and a coating layer including an infrared ray and an ultraviolet ray absorbing material on the surface of a substrate, a method for producing the same, and the carbon nanotube light- A light-extinguishing functional product coated on a garment or a transparent substrate produced by the above method is provided. According to the present invention, it is possible to obtain a carbon nanotube light-emitting functional product which can exert various colors and has excellent light heating / warming effect and transmittance and can be used in a transparent substrate at low cost.

Description

TECHNICAL FIELD [0001] The present invention relates to a carbon nanotube light-emitting functional product, a method for manufacturing a carbon nanotube light-emitting functional product, a garment manufactured using a carbon nanotube light-emitting functional product, and a bedding product made using a carbon nanotube light- carbon nanotube functional product, and bed clothes manufactured by the Carbon nanotube functional product}

More particularly, the present invention relates to a functional coating solution which improves transparency and color distortion caused by carbon nanotubes, a method for producing the functional coating solution, Functional carbon nanotube functional product obtained by using a functional coating solution and a manufacturing method thereof.

Carbon nanotubes have high thermal conductivity and excellent absorption of light energy at all wavelengths. It is possible to manufacture a light emitting functional product by utilizing the ability to convert absorbed light energy into thermal energy. In particular, infrared and ultraviolet absorbers can be added to improve the function and improve the black color of carbon nanotubes.

Skin damage caused by ultraviolet rays and aging of the skin are promoted, and it has been reported that skin cancer is caused by infrared rays. Effective blocking of infrared rays and ultraviolet rays is necessary, but no specific measures are suggested.

Korean Patent Laid-Open Publication No. 2002-0059047 discloses a heat-generating heat insulating coating fabric having a multilayer structure. A variety of advantages can be gained, such as the reduction of heating costs if household textile fabrics such as textile fabrics for clothes, curtains, and sofas have light heating and warming effect. Korean Patent Laid-Open Publication No. 2011-0010553 discloses a composite powder for simultaneous blocking of ultraviolet rays. When applied to cosmetics, skin damage caused by sunlight can be minimized.

In recent years, Mitsubishi Leon of Japan has developed a fiber in which core-sheathed acrylic staple fibers containing charcoal particles are absorbed by sunlight to exhibit heat-generating performance. Japan's DeSant and Deijin fibers absorb solar light We have developed a special flat section fiber containing a carbon-based inorganic material that exhibits heat generation performance.

However, the light-generating functional products developed so far have high production costs and do not exhibit the corresponding heat-generating effect of heat generation, and it is difficult to implement various colors, and thus there is much room for improvement. In particular, black color inherent in carbon nanotubes distorted other colors, making it difficult to express colors. Also, its use was limited with low transmittance.

An object of the present invention is to provide a carbon nanotube light-generating functional product and a method of manufacturing the carbon nanotube light-emitting functional product using the carbon nanotube light-generating functional coating solution capable of realizing a product having excellent light- Method.

In order to achieve the above object,

There is provided a carbon nanotube light-emitting functional product comprising a coating layer comprising a carbon nanotube (CNT), a dispersant, a resin binder, and an infrared ray and an ultraviolet ray absorbing material on a surface of a substrate.

Another object of the present invention is to provide a method for manufacturing a carbon nanotube film, which comprises coating and drying a coating layer composition comprising a carbon nanotube (CNT), a dispersant, a resin binder, an infrared ray and an ultraviolet ray absorbing material and a solvent on the surface of a substrate, Wherein the carbon nanotube light-emitting functional product comprises carbon nanotube (CNT), a dispersant, a resin binder, and a coating layer containing an infrared ray and an ultraviolet ray absorbing material.

It is still another object of the present invention to provide a functional product by coating a transparent substrate such as a fabric or glass fabricated using the above-described carbon nanotube light-emitting functional product or a polymer such as PET, PC, PI, PEN, COC have.

According to the present invention, a carbon nanotube light emitting functional product having excellent light transmittance can be obtained. It is possible to prevent distortion of color caused by black color of carbon nanotube, and it is possible to manufacture transparent substrate product by improving transmittance. When absorbing ultraviolet rays and infrared rays and utilizing it as a light generating heat, it is possible to obtain high temperature, ultraviolet ray and infrared ray blocking effect as compared with existing carbon nanotube light emitting products. It is possible to obtain a carbon nanotube light emitting functional product at a low cost as compared with the existing light emitting functional product.

1 to 8 are graphs for evaluating the light emitting functional properties of the carbon nanotube light-emitting functional products according to Reference Examples 1 and 1-7,
9 is a graph showing absorption rates of carbon nanotube light-emitting functional products and zinc oxide according to the carbon nanotube light-emitting functional products according to Reference Examples 1 and 1.

The present invention provides a coating composition containing carbon nanotubes having excellent light absorptivity and containing an infrared ray and an ultraviolet ray absorbing material, and a carbon nanotube light emitting functional product obtained by coating and drying the coating composition on a substrate surface. By coating the above-mentioned coating composition on the surface of the substrate, it is possible to obtain a light-generating functional product capable of realizing various colors with excellent light generating function and thermal insulation effect. By improving the transmittance, a usable product can be obtained in a transparent substrate.

Hereinafter, the present invention will be described in more detail.

There is provided a carbon nanotube light-emitting functional product comprising a coating layer comprising a carbon nanotube (CNT), a dispersant, a resin binder, and an infrared ray and an ultraviolet ray absorbing material on a surface of a substrate.

The infrared and ultraviolet absorbing materials are materials that absorb infrared rays and ultraviolet rays, and when they are added to a coating composition, the problem of color distortion of the light emitting functional product due to the use of carbon nanotubes can be compensated. It can also be applied to products that require transparency.

Examples of the infrared and ultraviolet absorbing materials include zinc oxide, indium tin oxide (ITO), antimony tin oxide (ATO), zinc tin oxide (Zn ₂ SnO ₄ , Zn ₂ SnO ₃ ), zinc antimonite), titanium nitride, cerium oxide, aluminum oxide, zirconium oxide, poly (3,4-ethylenedioxy-thiophene) / polystyrenesulfonate (PEDOT; PSS) One or more selected.

The content of the infrared and ultraviolet absorbing materials is 50 to 5000 parts by weight, for example, 1000 to 2000 parts by weight, based on 100 parts by weight of the carbon nanotubes.

When the content of the infrared ray and the ultraviolet ray absorbing material is in the above range, the transmittance is improved and a carbon nanotube light emitting functional fabric having various colors can be obtained.

The light-generating functional fabric can be used in a variety of outdoor clothes requiring heat insulation, leisure goods such as sports articles, mountain climbing, fishing, etc., uniforms, sofas for curtains and sofas for interior decorations. Thus, fabrics usable in the present invention include both yarns of synthetic fibers and natural fibers. Examples of fabrics include cotton, polyester, nylon, rayon, and acetate, and mixed fabrics produced by using these alone or in combination may all preferably be used. Examples of the transparent substrate include glass, and polymers such as PET, PC, PI, PEN, and COC.

Hereinafter, a method for preparing a carbon nanotube light-emitting functional product using the carbon nanotube coating composition according to the present invention will be described.

The carbon nanotube light-emitting functional fabric according to one embodiment of the present invention is formed by coating a coating composition containing a carbon nanotube, an infrared ray, and an ultraviolet ray absorbing material on a fabric fabric, thereby forming a light- Can be manufactured.

The coating composition includes carbon nanotubes (CNTs), infrared and ultraviolet absorbing materials, dispersants, resin binders and solvents.

The types and contents of the infrared and ultraviolet absorbing materials are as described above.

The carbon nanotubes may be selected from the group consisting of single wall carbon nanotubes (SWNTs), double wall carbon nanotubes (DWNTs), thin wall carbon nanotubes (thin MWNTs), and multiwall carbon nanotubes .

It is preferable that the carbon nanotubes undergo a surface modification process to improve adhesion with the resin binder and dispersibility. Methods for surface modification of carbon nanotubes include liquid phase or gaseous acid treatment, ozonated water treatment, plasma treatment and the like by conventional conventional methods. These conventional carbon nanotube surface modification methods can be easily carried out by those having ordinary skill in the art to which the present invention belongs.

The carbon nanotube coating composition is required to uniformly and finely disperse the carbon nanotubes in order to improve the light absorption area. To this end, a dispersant or a surfactant is added. As the dispersant used in the present invention, commercially available surfactants can be used. Representative examples of the dispersing agent include sodium dodecyl sulfate (SDS), sodium dodecylbenzene sulfonate (SDBS), SDSA (sodium dodecanesulfonic acid), DTAD (triad (dodecyldinethylammonioacetoxyl) diethyltriaminetrichloride), cetyltrimethyl Sodium dodecylbenzene sulfonate (NaDDBS), cholic acid, polyoxyethylene lenesorbitan trioleate (trade name: " Cetyltrimethylammonium bromide "), Tween 85), polyethylene glycol octadecyl ether (Polyethylene glycol octadecyl ether) (trade name: Sigma-Aldrich Co., Brij 78, Brij 700), polyethylene glycol tert-octylphenyl ether (Polyethylene glycol tert -octylphenyl ether) (trade name: Triton X) , PVP, EC (Ethyl Cellulose), Nafion, HPC (Hydroxy Propyl Cellulose), CMC (Carboxy Methyl Cellulose), HEC (Hydroxy Ethyl Cellulose), PLURONIC (PEO-PPO Copolymer) . They may be used alone or in the form of a mixture of two or more.

The dispersing agent is 5 to 500 parts by weight based on 100 parts by weight of the carbon nanotubes. When the content of the dispersant is within the above range, a coating composition having excellent dispersibility can be obtained. A resin binder is used for the coating liquid in order to ensure bonding with the fibers and washing fastness.

The resin binder includes a thermosetting binder and a UV curable binder. Specific examples of the resin binder include a group consisting of a urethane resin, an acrylic resin, a urethane-acrylic copolymer, a polyimide, a polyamide, a polyether resin, a polyolefin resin and a melamine resin Selected alone or a mixture of two or more thereof may be used.

The resin binder is 1000 to 10000 parts by weight based on 100 parts by weight of the carbon nanotubes. The kind and amount of the resin binder can be easily practiced by those skilled in the art within the range in consideration of the relationship with other components.

The carbon nanotubes, infrared and ultraviolet absorbing materials, dispersants, and resin binders are mixed in a solvent to prepare a coating composition.

The solvent is selected from the group consisting of water, methanol, ethanol, ethyl acetate, acetone, methyl ethyl ketone (MEK), toluene, N, N-dimethylformamide (DMF) or a mixture thereof. However, it is not necessarily limited to these solvents. The solvent is used in an amount of 70 to 99% by weight when the solid content of the coating composition is 1-30% by weight.

Various additives may be added to the coating composition to impart the stability of the solution or the specific function required. The additive to be added includes a slip agent, a flow improver, an antistatic agent, an antibacterial agent, a deodorant, a water repellent agent, a oil repellent agent, an air / water vapor / perspiration agent, a friction coefficient improving agent, an anion releasing agent, a deodorant, Two or more of them may be used in combination. Of course, the additive is not necessarily limited to the above additives, and other additives may be suitably used depending on the intended use. The content of the additive is 10 to 1000 parts by weight based on 100 parts by weight of the carbon nanotubes.

As a method of coating the above-mentioned coating composition on the surface of the base fabric, gravure, offset, kiss bar, knife, Meyer bar, roll coating, dipping, spray and the like can be used. The coating composition may be coated on a membrane or a thin film and then applied to the fabric through a lamination process with the fabric.

As a method of coating the above-mentioned coating composition on a glass and a transparent polymer substrate which are substrates, general wet coating methods such as spray coating, gravure coating, slot die coating, dip coating, bar coating and roll to roll coating can be used.

When the coating composition is coated on the fabric, the coating result is cured by transferring the coating solution at a constant rate in a chamber or at room temperature. The coating method or the curing process after coating, that is, the temperature of the chamber, the conveying speed of the fabric in the chamber, the amount of UV light, and the like can be changed according to the type and the specification of the fabric. And can be easily carried out by a person skilled in the art.

The carbon nanotube light-generating functional fabric according to another embodiment of the present invention can be manufactured by mixing an adhesive and a carbon nanotube coating composition during bonding of a fabric and a fabric by bonding. The kind and amount of the adhesive used in this case can be easily carried out by a person having ordinary skill in the art to which the present invention belongs.

The present invention will be further illustrated by the following examples, which should not be construed to limit or limit the scope of protection of the present invention.

Example 1: Preparation of carbon nanotube light-emitting functional product

In preparing the carbon nanotube coating solution according to the present invention, 0.5 part by weight of MWNT, 0.05 part by weight of dispersant, 0.1 part by weight of defoamer, 10 parts by weight of zinc oxide (ZnO) and 89.35 parts by weight of distilled water were mixed and dispersed using an ultra high pressure disperser.

Preparation of light emitting functional product: The coating composition obtained by the above process was coated on a plasma treated PET film and cured at room temperature to obtain a carbon nanotube light emitting functional product.

Example 2: Preparation of a carbon nanotube light-emitting functional product

A carbon nanotube light emitting functional product was produced in the same manner as in Example 1, except that zinc antimony salt was used instead of zinc oxide in the preparation of the coating composition.

Example 3: Preparation of carbon nanotube light-emitting functional product

A carbon nanotube light-heat-generating functional product was produced in the same manner as in Example 1 except that cerium oxide (CeO ₂ ) was used instead of zinc oxide in the preparation of the coating composition

Example 4: Preparation of carbon nanotube light-emitting functional product

A carbon nanotube light-emitting functional product was prepared in the same manner as in Example 1, except that aluminum oxide (Al ₂ O ₃ ) was used instead of zinc oxide in the preparation of the coating composition

Example 5: Preparation of carbon nanotube light-emitting functional product

A carbon nanotube light-emitting functional product was produced in the same manner as in Example 1, except that zirconium oxide (ZrO ₂ ) was used instead of zinc oxide in the preparation of the coating composition

Example 6: Preparation of a carbon nanotube light-emitting functional product

A carbon nanotube light-emitting functional product was prepared in the same manner as in Example 1, except that indium tin oxide (ITO) was used instead of zinc oxide in the preparation of the coating composition.

Example 7: Preparation of a carbon nanotube light-emitting functional product

Except that poly (3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT: PSS) was used in place of zinc oxide in the preparation of the coating composition, a carbon nanotube light- .

Reference Example 1: Manufacture of Carbon Nanotube Light-Emitting Products

The carbon nanotube light-emitting functional product of Reference Example 1 was produced in the same manner as in Example 1, except that no zinc oxide was added in the preparation of the coating composition.

≪ Evaluation Example 1 >: Evaluation of light generating functional property

1) Photothermal properties of the carbon nanotube light-emitting functional solution according to Reference Example 1 and Example 1-7

The light exothermic functional effects of the carbon nanotube light-generating functional solution according to Reference Examples 1 and 1-7 were evaluated according to the following methods.

The surface temperature of the coated film was measured using a thermocouple while irradiating the coated surface with light at room temperature by using an infrared lamp disposed at a distance of about 60 cm from the PET film coated with the light generating functional solution. The temperature of the PET film before application of the coating composition and the temperature of the film after application and drying of the coating composition were measured, and the temperature difference (DELTA T) was calculated and shown in Table 1 below.

division ΔT Reference Example 1 3.5 Example 1 5.5 Example 2 4.5 Example 3 3.9 Example 4 3.4 Example 5 3.3 Example 6 2.1 Example 7 2.5

Referring to Table 1, it was found that the carbon nanotube light-absorbing functional product of Example 1-7 had excellent light exothermic functional effect.

2) Graph of light emission characteristic of the carbon nanotube light-emitting functional product according to Example 1-7

In the carbon nanotube light-emitting functional product of Example 1-7, an infrared lamp was turned on, and the temperature was measured with time. Then, the lamp was turned off and the temperature was measured with time, which is shown in Figs. 2 to 8, respectively. In FIG. 2, the uncoating is shown for comparison with those of Examples 1-7 for the PET film prior to coating the coating composition on the surface of the plasma treated PET film.

Referring to Figs. 2-7, it was confirmed that the carbon nanotube light-emitting functional product of Example 1-7 had excellent light exothermic functional effect.

≪ Evaluation Example 2 >: Measurement of transmittance

1) Measurement of transmittance of the carbon nanotube light-emitting functional product according to Reference Example 1 and Example 1-7

The transmittance of 550 nm of visible light in the carbon nanotube light-emitting functional product according to Reference Example 1 and Example 1-7 was measured and the results are shown in Table 2 below.

division Transmittance (%) Reference Example 1 47 Example 1 56 Example 2 65 Example 3 54 Example 4 62 Example 5 57 Example 6 64 Example 7 52

Referring to Table 2, it was found that the carbon nanotube light-generating functional fabric of Example 1-7 had excellent transmittance characteristics.

≪ Evaluation Example 3 >: Measurement of absorption rate

The absorption rate of the carbon nanotube light-generating functional fabric according to Example 1 was examined, and the results are shown in FIG. 9 shows the absorption rate of zinc oxide and the absorption rate of a light emitting product using only carbon nanotubes according to Reference Example 1 for comparison with the absorption rate in the case of Example 1.

Referring to FIG. 2, the carbon nanotube light-absorbing functional fabric according to Example 1 was found to have an overall increase in water absorption as compared with the case of Reference Example 1. Particularly, although the absorption rate of the ultraviolet ray portion is high, it can be seen that the absorption is also taking place in the visible ray and the infrared ray region, and the light energy is changed into heat energy through the absorption to increase the temperature of the carbon nanotube light- .

The scope of protection of the present invention will be defined by the appended claims, and all modifications and alterations of the present invention should be construed as being within the scope of the present invention.

Claims (13)

A carbon nanotube (CNT), a dispersant, a resin binder, and an infrared ray and an ultraviolet ray absorbing material on the surface of the substrate,
Wherein the content of the infrared and ultraviolet absorbing materials is 50 to 5000 parts by weight based on 100 parts by weight of the carbon nanotubes. The method of claim 1, wherein the infrared and ultraviolet absorbing material
Zinc oxide, zinc oxide, indium tin oxide (ITO), antimony tin oxide (ATO), zinc tin oxide (Zn ₂ SnO ₄ , Zn ₂ SnO ₃ ), zinc antimonite, Wherein the carbon nanotube light-absorbing functional solution is at least one selected from the group consisting of cerium oxide, aluminum oxide, zirconium oxide, poly (3,4-ethylenedioxy-thiophene) polystyrene sulfonate (PEDOT: PSS) Coated carbon nanotube light-emitting functional product. delete The product of claim 1, wherein the base material is glass or a transparent substrate, or at least one polymer selected from PET, PC, PI, PEN, and COC. The method according to claim 1,
And 5 to 500 parts by weight based on 100 parts by weight of the carbon nanotubes. A coating composition comprising carbon nanotubes (CNT), a dispersant, a resin binder, an infrared ray and an ultraviolet ray absorbing material is applied between a fabric and a fabric,
The coating composition is further provided with an adhesive,
Characterized in that the coating composition is applied between a fabric and a fabric, which is a substrate, and is obtained by bonding the carbon nanotube to the fabric. (CNT), a dispersing agent, a UV absorber, and a solvent on the surface of a base material, and coating and drying a coating layer composition comprising a carbon nanotube (CNT), a dispersant, a resin binder, , A resin binder, and a coating layer containing an infrared ray and an ultraviolet ray absorbing material,
The substrate is a transparent substrate that is woven or coatable,
Wherein the carbon nanotube light-generating functional product is a light-generating functional fabric or a light-generating functional product. The coating composition according to claim 7, wherein the coating composition is applied to the coating composition in the presence of a slipping agent, a flow improver, an antistatic agent, an antibacterial agent, a deodorant, a water repellent agent, a oil repellent agent, an air / water vapor / perspiration agent, a friction coefficient improving agent, Wherein at least one selected from the group consisting of carbon nanotubes and carbon nanotubes is mixed. The method of claim 7, wherein the coating composition is applied by gravure, offset, kiss bar, knife, Meyer bar, roll coating, dipping, or spray method. 8. The method of claim 7, wherein the carbon nanotubes are single-walled carbon nanotubes or multi-walled carbon nanotubes . delete A garment manufactured using the carbon nanotube light-heat-generating functional product according to any one of claims 1, 2, 4, 5, and 6. A bedding product produced by using the carbon nanotube light-emitting functional product of any one of claims 1, 2, 4, 5, and 6.

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