KR20200126696A - Manufacturing method of graphene-coated carbon fiber garment having a heat generating function - Google Patents

Abstract

The present invention relates to a method for manufacturing graphene-coated carbon fiber clothes having a heating function, and capable of being easily washed and being used as regular clothes. More specifically, in the method for manufacturing graphene-coated carbon fiber clothes having a heating function, which comprise graphene-coated carbon fibers disposed on a back portion and a pocket portion of the clothes, a battery disposed in an inner pocket of the clothes and supplying power, and a connector connecting the battery and a heating textile to supply the power and designated to be separated from the graphene-coated carbon fibers, the graphene-coated carbon fibers are manufactured by the following steps: preparing a carbon fiber layer including a plurality of carbon fibers; uniformly distributing the density of the plurality of carbon fibers to mix and coat graphene on the carbon fibers to increase electric conductivity and heating properties; and impregnating the graphene-coated carbon fiber layer with an adhesive with a specific resistance less than that of the graphene-coated carbon fiber layer and greater than that of the metal electrode to attach the metal electrode to the graphene-coated carbon fiber layer.

Description

Manufacturing method of graphene-coated carbon fiber garment having a heat generating function}

The present invention relates to a method of manufacturing a graphene-coated carbon fiber clothing having a heating function.

In general, in doing outdoor activities such as fishing, people have many problems due to the temperature difference between day and night. Even if it is not in winter, the temperature difference between daytime and nighttime in a river or sea is very large.

For this reason, people often use vest-shaped clothing to overcome the cold and practical problems. To add a cold protection function to the vest, add a fur-attached inner skin, or by providing a pocket inside the vest. A method of using a thermal insulation pack that generates self-heating when friction is applied was used.

However, such a conventional method has a problem that is limited to one-off in generating heat, and also has a problem that the heating temperature is not very high.

The present invention is to solve the above problems, comprising a heating fabric provided in the back plate and pocket of the clothing, a battery provided in the inner pocket of the clothing, and a battery connected to the heating fabric to supply power, and the heating fabric is a connector It is an object of the present invention to provide a method for manufacturing graphene-coated carbon fiber clothing that is connected to and has a heat-generating function that can be separated.

In order to realize the above object, the present invention provides a graphene-coated carbon fiber provided in a back plate portion and a pocket portion of clothing; A battery provided in an inner pocket of the clothing and supplying power; In the manufacturing method for manufacturing a graphene-coated carbon fiber clothing having a heating function including; a connector designed to be separated from the graphene-coated carbon fiber and supplying power by connecting the battery and the heating fabric, wherein the Graphene-coated carbon fiber, preparing a carbon fiber layer including a plurality of carbon fibers; Coating the carbon fibers by mixing graphene to improve electrical conductivity and heat generation by uniformly dispersing the plurality of carbon fiber densities; And impregnating the graphene-coated carbon fiber layer with a conductive adhesive having a specific resistance lower than that of the graphene-coated carbon fiber layer and higher than that of the metal electrode so that the metal electrode is attached to the graphene-coated carbon fiber layer. It provides a graphene-coated carbon fiber clothing manufacturing method having a heating function, which is manufactured through the step.

The present invention relates to a method of manufacturing a graphene-coated carbon fiber clothing having a heat generating function, wherein a heating fabric is provided on a back plate and a pocket portion of the clothing, a battery provided in an inner pocket of the clothing, and the battery and the heating fabric. It is connected to supply power, and is provided with a detachable power supply line connected to the heating fabric by a connector, so that washing is easy and can be used as general clothing.

1 is a schematic configuration diagram of a graphene-coated carbon fiber garment having a heating function according to the present invention.
2 is a cross-sectional view of a heating fabric provided on a back plate and a pocket portion of a graphene-coated carbon fiber garment having a heating function according to the present invention.
3 is a view showing a flow chart of a method of manufacturing a graphene-coated carbon fiber in a graphene-coated carbon fiber garment having a heating function according to the present invention.

The following content merely illustrates the principles of the present invention. Therefore, those skilled in the art can implement the principles of the present invention and invent various devices included in the concept and scope of the present invention, although not clearly described or illustrated herein. In addition, it is understood that all conditional terms and examples listed in this specification are, in principle, expressly intended only for the purpose of making the concept of the present invention understood, and are not limited to the embodiments and states specifically listed as such. Should be.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention belongs It is provided to completely inform the scope of the invention to those who have it, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

Although the first, second, etc. are used to describe various elements, components and/or sections, of course, these elements, components and/or sections are not limited by these terms. These terms are only used to distinguish one element, component or section from another element, component or section. Therefore, it goes without saying that the first element, the first element, or the first section mentioned below may be a second element, a second element, or a second section within the technical scope of the present invention.

The terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprises" and/or "made of" a referenced component, step, operation and/or element is one or more of the other elements, steps, operations and/or elements. It does not exclude presence or addition.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a graphene-coated carbon fiber garment having a heating function according to the present invention.

Referring to FIG. 1, graphene-coated carbon fiber clothing having a heating function according to the present invention is graphene-coated carbon fiber 110 provided on the back plate and pocket portions of the clothing 100, and the inner pocket of the clothing 100. A connector designed to be separated from the graphene-coated carbon fiber 110 by connecting the battery 120 to supply power and supplying power by connecting the battery 120 and the graphene-coated carbon fiber 110 ( 130).

The heating clothing 100 of the present invention may include all of the ordinary heating clothing 100. That is, a heating jumper, a heating jacket, a heating coat, a heating vest, a leisure heating suit, a heating work clothes, and the like.

However, in the present invention, it will be described in the form of a vest 100 having a heat generating function for convenience of description.

A battery 120 for supplying power to the graphene-coated carbon fiber 110 is provided in an inner pocket of the graphene-coated carbon fiber garment 100 having a heating function.

The battery 120 is provided with a control device. The control device includes a switch for turning on/off power and a temperature control device for controlling the temperature of the graphene-coated carbon fiber 110.

When the battery on/off switch of the battery 120 is turned on, power is supplied to the connector 130 and electricity is applied to generate heat in the graphene-coated carbon fiber 110 of the clothing.

The calorific value of the graphene-coated carbon fiber 110 is controlled by the temperature controller of the battery 120 so that the wearer can operate the graphene-coated carbon fiber 110 at a temperature suitable for the human body.

In addition, since the graphene-coated carbon fiber 110 and the battery 120 are connected by a connector 130, it is possible to separate and carry from the clothing 100, so that washing is easy and can be used as general clothing. There is this.

2 is a cross-sectional view of a heating fabric provided on a back plate and a pocket portion of a graphene-coated carbon fiber clothing having a heating function according to the present invention.

Referring to FIG. 2, the graphene-coated carbon fiber 110 provided on the back plate and pocket of the graphene-coated carbon fiber clothing having a heating function according to the present invention is a carbon fiber layer 111 including a plurality of carbon fibers. , Graphene 112 coated on the carbon fiber layer 111 and at least one metal electrode 113 attached to one surface of the carbon fiber layer 111 coated with the graphene 112. Here, the graphene 112 is mixed and coated with the carbon fiber layer 111. The carbon fiber layer 111 coated with the graphene 112 becomes a heating element that emits heat, and the metal electrode 113 transmits current to the carbon fiber layer 111 that emits heat. That is, the carbon fiber layer 111 coated with the graphene 112 becomes a heating unit, and the metal electrode 113 becomes an electrode unit. At this time, the carbon fiber layer 111 coated with the graphene 112 is at least one impregnated with a conductive adhesive that attaches the at least one metal electrode 113 to one surface of the carbon fiber layer 111 coated with the graphene 112 Includes an impregnated area 114 of.

The carbon fiber layer 111 coated with the graphene 112 serving as a heating unit and the metal electrode 113 serving as the electrode unit each have different resistivity, and the voltage applied by this resistance difference decreases A drop phenomenon occurs, and the heat generation concentration phenomenon may occur due to the high calorific value per unit area on the contact surface, but the heat generation is concentrated by the conductive adhesive in the impregnated region 114 of the carbon fiber layer 111 coated with the graphene 112 This is resolved. In this case, it is preferable that the specific resistance of the conductive adhesive is lower than that of the carbon fiber layer (!11) coated with the graphene 112 and higher than that of the metal electrode 112.

Specifically, the conductive adhesive is impregnated into the inside of the carbon fiber layer 111 coated with graphene 112 to coat the surface of the carbon fiber, and attach the coated surface to one surface of the metal electrode 112, thereby making the metal electrode ( 112) constitutes a form capable of conducting the applied voltage, thereby forming an intermediate resistance zone between the resistance of the metal electrode 112, which is the electrode part, and the resistance of the carbon fiber layer 111, which is the heating part, and generates heat due to a sudden voltage drop. Concentration can be minimized. That is, in the carbon fiber layer 111 coated with the graphene 112, the electrical resistance of the impregnated region 114 is lower than that of the non-impregnated region excluding the impregnated region 114, and the metal electrode 112 is electrically The resistance is lower than the electrical resistance of the impregnated region 114.

The metal electrode 112 transports electrons to a long distance under a slight voltage drop, and the conductive adhesive impregnated in the impregnating region 112 transfers electrons faster than the carbon fiber to the carbon fiber layer 111 coated with the graphene 112. It is moved to the inside, and the carbon fiber layer 111 coated with the graphene 112 uniformly receives electrons and operates as a heating unit. Thus, unlike the conventional planar heating element using carbon black, there is no need to make a separate layer between the metal electrode 113 and the carbon fiber layer 111 coated with the graphene 112 as a heating element, There is no need to use a silver paste with excellent conductivity.

The carbon fiber layer 111 serves as a heat generating unit, and may be made of a bundle including carbon fibers or a cloth including carbon fibers. The carbon fiber cloth may be formed in a cotton shape such as a nonwoven fabric containing carbon fiber, felt, woven fabric, or sheet. In addition, the carbon fiber cloth may be formed by arranging a plurality of carbon fiber bundles in parallel or perpendicular to the metal electrode 113 direction. In addition, the carbon fiber bundle may be expanded to a predetermined width to attach to the metal electrode 113 in a wider area, or may be expanded only at a portion in contact with the metal electrode 113.

Here, as the carbon fiber, not only PAN-based (polyacrylonitrile-based), pitch-based, rayon-based, but fibrous co-carbon-containing material may be used. These carbon fibers may have a one-dimensionally elongated structure, and of course there is no particular limitation on the fiber length of the carbon fibers.

If the fiber length of the carbon fiber is longer, the conductivity and strength are improved, whereas if the fiber length of the carbon fiber is too long, the dispersibility of the carbon fiber may be deteriorated. In addition, when the fiber length is too short, the bonding force between the fibers may decrease, resulting in poor shape stability. Therefore, carbon fibers of an appropriate length should be used, and the average fiber length may vary depending on the type of carbon fiber to be used and the fiber diameter. In addition, if the fiber diameter of the carbon fiber is too large, the pore size may be too large, and if the fiber diameter is too small, it may be difficult to bond by a binder due to poor workability, and thus carbon fibers having an appropriate average fiber diameter may be used.

For example, as an example of a carbon fiber cloth, a binder is added using a chopped carbon fiber cut into a length of about 1 to 30 mm in the form of a non-woven fabric, and a carbon fiber non-woven fabric is manufactured through a wet-laid device. I can. At this time, the binder includes a urethane group, an epoxy group, a carboxyl group, a carbonyl group, an acrylic group, a hydroxy group, an ester group, an ether group, a vinyl acetate group, an amide group, an imide group, and a maleic acid group represented by polyvinylidene fluoride (PVdF). Organic binders or aqueous binders such as polyvinylpyrrolidone (PVP), polytetrafluoroethylene (PTEE), styrene butadiene rubber (SBR), carboxymethylcellulose (CMC) and polyvinyl alcohol (PVA) are selected according to the manufacturing purpose. It can be used, and the content can be determined in consideration of the content of the carbon fiber used and the thickness and conductivity of the carbon fiber cloth to be manufactured. At this time, cellulose, curdran, tamarind, gelatin, guar gum, pectin, LBG, carrageenan, konjac, alginic acid, arabic, gellan, xanthan, etc. can be added and used for the purpose of improving the viscosity to increase dispersion stability.

In the present invention, graphene 112 is used to compensate for the carbon fiber because a dense portion having a relatively high density and a dense portion having a low density are arbitrarily formed in the process. When the graphene 112 is mixed with the carbon fiber, the density is uniformly dispersed, so that it may have various heating characteristics.

The graphene 112 is a thin film composed of carbon atoms and having a thickness of one atom, and is a nanomaterial composed of carbon having an atomic number of 6, such as carbon nanotubes and fullerene. Graphene 112 has high physical and chemical stability. It conducts electricity more than 100 times better than that, and can move electrons more than 100 times faster than single crystal silicon, which is mainly used as a semiconductor, and its strength is more than 200 times stronger than that of steel, and more than 2 times that of diamond, which boasts the best thermal conductivity. High thermal conductivity. In addition, it has excellent elasticity and does not lose its electrical properties even when it is stretched or bent.

In addition, the graphene 112 is graphene (GP) or graphene oxide (GO) in an oxide state, or graphene (RFO) in a reduced state of the graphene oxide (GO) is used, 10~ It has a surface area of 3,000㎡/g and has an elastic modulus of 800 to 1,300 GPa and a tensile strength of 100 to 150 GPa.

In the present invention, the graphene 112 may be used in the form of a thin film or a liquid in order to be well mixed in the carbon fiber layer 111.

The metal electrode 113 may be made of a metal including copper, aluminum, silver, nickel, tin, or an alloy thereof. In addition, the shape may be a ribbon or a line shape. The wire shape may be a copper wire or a silver-plated copper wire. Ribbon shape may be about 3 ~ 100μm thick.

The impregnated region 114 is formed by impregnating a conductive adhesive into the carbon fiber layer 111 coated with the graphene 112 and is attached to one surface of the metal electrode 113. In the case of the conductive adhesive impregnated in the carbon fiber layer 111 coated with the graphene 112 as the heating part and adhered to the metal electrode 112 as the electrode part, the resistivity level is higher than that of the metal electrode 113 and lower than the carbon fiber layer 111. It is an adhesive containing a conductive filler formulated to have. Specifically, the carbon fiber layer 111 coated with the graphene 112 according to the density, thickness, and porosity of the carbon fiber layer 111 coated with the graphene 112 made in the form of a nonwoven fabric, felt, sheet, etc. A conductive adhesive having a viscosity of 10 to 15,000 cps that can be sufficiently impregnated into the interior of the can be used.

Here, the conductive adhesive impregnated in a partial area of the carbon fiber layer 111 coated with the graphene 112 is 1 to 85% by weight of a solvent, 0.1 to 15% by weight of a polymer binder, and 1 to 55% by weight of a conductive filler. It may include. The amount of use of each composition is the range of the specific resistance of the conductive adhesive in consideration of the resistance of the carbon fiber layer 111 coated with the graphene 112 and the metal electrode 113, and the carbon fiber layer 111 coated with the graphene 112 Considering the density and porosity, it may be used to suit the purpose such as viscosity. In the case of a polymer binder, at least one selected from acrylate resin, epoxy resin, polyester, polyurethane, polycarbonate, polyamide, polyimide, and polyether may be included. In addition, as the conductive filler, carbon nanotubes, carbon black, pulverized carbon fibers, and metal powders such as gold, silver, and copper may be used. In addition, organic solvents such as water, alcohol, acetone, N-methylpyrrolidone (NMP), ethylene glycol, propylene glycol, and glycerin may be used as the solvent.

In addition, for excellent electrical performance and high impregnation rate, a single-walled or multi-walled carbon nanotube may be mixed with a conductive adhesive. For example, the appropriate mixing amount of the carbon nanotubes may be 7% by weight or more of the solid content after drying the conductive adhesive solution at 250 degrees.

3 is a view showing a flow chart of a method of manufacturing a graphene-coated carbon fiber in a graphene-coated carbon fiber garment having a heating function according to the present invention.

Referring to FIG. 3, a method of manufacturing a graphene-coated carbon fiber in a graphene-coated carbon fiber garment according to an embodiment of the present invention includes preparing a carbon fiber layer 111 including a plurality of carbon fibers (S10), The carbon fiber layer 111 is coated with graphene 112 to improve electrical conductivity and heat generation by uniformly dispersing the plurality of carbon fiber densities (S20), and the graphene 112 is coated. A conductive adhesive having a specific resistance lower than that of the carbon fiber layer 111 and higher than that of the metal electrode 113 is impregnated into the carbon fiber layer 111 so that the metal electrode 113 is attached to the carbon fiber layer 111 (S30) ).

Therefore, by solving the heat concentration phenomenon that occurs due to contact resistance at the boundary between the electrode and the carbon fiber, without using the conventionally used metal tape, etc., energy loss due to heat uneven distribution and the risk of burns and fire are reduced. It can be significantly reduced.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You can understand. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting.

Claims (4)

Graphene-coated carbon fibers provided on the back and pockets of clothing;
A battery provided in an inner pocket of the clothing and supplying power;
In the manufacturing method for manufacturing a graphene-coated carbon fiber clothing having a heating function comprising; a connector designed to be separated from the graphene-coated carbon fiber and supplying power by connecting the battery and the heating fabric,
The graphene-coated carbon fiber,
Preparing a carbon fiber layer including a plurality of carbon fibers;
Coating the carbon fibers by mixing graphene to improve electrical conductivity and heat generation by uniformly dispersing the plurality of carbon fiber densities; And
Impregnating the graphene-coated carbon fiber layer with a conductive adhesive having a specific resistance lower than that of the graphene-coated carbon fiber layer and higher than that of the metal electrode so that the metal electrode is attached to the graphene-coated carbon fiber layer Manufactured through,
Graphene-coated carbon fiber clothing manufacturing method with a heating function.
The method of claim 1,
The graphene,
Consisting of carbon atoms, graphene (GP) or graphene oxide (GO) in an oxide state, or graphene (RFO) in a reduced state of the graphene oxide (GO), and used in the form of a thin film or a liquid Characterized in that,
Graphene-coated carbon fiber clothing manufacturing method with a heating function.
The method of claim 1,
The battery,
A control device for controlling the battery is provided, wherein the control device comprises a switch for turning on/off the battery and a temperature control device for controlling the temperature of the graphene-coated carbon fiber clothing,
Graphene-coated carbon fiber clothing manufacturing method with a heating function.
The method of claim 1,
The clothing is characterized in that it comprises at least one or more of a jumper, a jacket, a coat, a vest, a leisure heat generating suit and a heat generating work clothes,
Graphene-coated carbon fiber clothing manufacturing method with a heating function.

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