KR20150120005A - Antibacterial Fiber and Fabric Heated by Electromagnetic Wave - Google Patents

Abstract

The present invention relates to heat generating antibacterial fiber and a fabric manufactured with the same fiber, which makes an iron oxide compound and a carbon compound, contained in the fiber and the fabric, generate heat by light to be capable of self-generating heat only by radiating light without other special heat generating devices and to have antibiosis. The fiber and the fabric according to the present invention may provide a warm keeping effect without other special heat generating devices by self-generating heat using solar rays; reduce the influence of ambient temperature changes on a human body since warm keeping properties are excellent; show the antibiosis by containing particles which provide the heat generation effect since the particles have antibacterial activity; prevents the fiber from being cut during radiation of the heat since the heat generating antibacterial particles have micro-diameters; and prevents the particles from being separated from the fiber by an external force like a washing operation since the particles are regularly dispersed in the resin constituting the fiber and coupled to the resin, thereby continuously providing heat generating and antibiosis effects even if being used for a long time.

Description

{Antibacterial Fiber and Fabric Heated by Electromagnetic Wave}

The present invention relates to a heat-generating antibacterial fiber having antimicrobial properties and capable of self-heating only by irradiation of light even when the iron oxide compound and the carbon compound contained in the fiber and the fabric are heated by light, will be.

Nylon, polyester and other synthetic fiber materials for apparel are constantly being developed and marketed with new fiber materials added with functionality and sensitivity in accordance with the changing needs of consumers.

Since fiber materials for outdoors are required to have mobility, aesthetics, safety, and physiological comfort, they must be equipped with a comprehensive technological warmth, water repellency, light weight, absorbency, moisture permeability, waterproofness and ventilation. Especially, Insulation function is important.

There are two methods to improve the warming effect. One method is to physically increase the air layer inside the clothes by changing the fabric structure of the clothes or making the fibers hollow or porous There is a passive method of maintaining the warmth by reducing the divergence of heat generated from the human body.

For example, in the above method, a lot of air layers are formed in clothes, a cloth is made thicker, a gap is made smaller, or a color is darkened. For example, cotton is put between the outer and lining of winter clothes, It is not suitable for sports which requires ease of operation because it is thick and bulky when cotton is put into clothing to maintain warmth by thickness.

As another method for improving the warming effect, there is a method of chemically or physically processing the entire fabric of a garment or clothes to reflect the heat generated from the human body back to the human body, or converting part of sunlight received by the garment into heat There is an active way to improve heat retention by accumulating heat.

The above-mentioned method includes the steps of: preparing an electrically heated fiber using a special battery, a chemical reaction heat fiber using heat generated when the iron powder is oxidized in contact with oxygen in the air, a moisture absorbing heat fiber using heat absorbed by moisture absorption, And thermal storage fibers have been developed, but these methods are limited to special purposes or can only be used for a limited time and have a disadvantage that they are not durable.

In order to solve such a problem, a method of positively preventing heat dissipation is proposed by depositing or coating a metal such as aluminum or titanium on the lining of a garment or the like and reflecting radiant heat from the body on the metal deposition surface. Korean Patent Registration No. 10-1253032 discloses a carbon material of carbon fiber, carbon nanofiber and / or carbon nanotube in combination with inorganic material of titanium dioxide, zinc oxide, alumina, zirconia and / Dispersing the dispersion in an organic solvent, and spraying, dipping, spraying or transferring the obtained dispersion onto a fiber or a fabric.

According to the above publication, it is possible to economically impart heat, heat, and heat storage functions to fibers or fabrics by coating carbon or inorganic materials on fibers or fabrics, And if it is given a high binding force through deposition to prevent this, the deposition cost is high and the production efficiency is lowered due to the occurrence of deposition unevenness, resulting in a rise in the price of the product.

As another method, ceramic particles such as alumina-based, zirconium-based, magnesia-based, etc. are blended into the fibers themselves, and a method of using the function of converting the far infrared rays emitted from the inorganic fine particles or converting the light into heat, Is proposed.

As such a method, Korean Patent Laid-Open Publication No. 10-1990-0003442 discloses a method of preparing a solution of a dendritic conductive material by mixing a polypropylene solution with a conductive powder such as carbon powder, adding a urethane or acrylic solution to the ceramic powder, A process for producing a conductive heating fiber in which a composite solution obtained by mixing the conductive material solution and a ceramic solution is impregnated with a fiber yarn or a fiber product so that the composite solution penetrates into the fiber structure and the insulating solution is applied to the surface have.

The present invention can be expected to have a beneficial effect on the human body since heat generated by the conductive powder and generation of the far-infrared rays by the ceramic powder are simultaneously provided and the far infrared rays are generated simultaneously with the heating. However, there is a limit to penetration of the composite solution into the fibers, If the composite is thinly coated and easily exfoliated from the yarn or fiber product, if the heat and the far-infrared ray effect are insufficient and applied to a large thickness, there is a problem that other functionalities such as flexibility and lightness of the fiber yarn or fiber product are deteriorated.

Korean Patent Registration No. 10-0337267 discloses that 0.3 to 10 wt% of a ceramic filler belonging to Group 4 of the periodic table and 1 to 15 wt% of a conductive material such as carbon, nickel, copper sulfide, metal compound, A ceramic material having a high far-infrared ray emissivity has a characteristic of absorbing near-infrared rays upon receiving sunlight, storing heat as heat energy, and reflecting heat from the human body, and thus, Has the advantage that the ease of use is equal to that of ordinary fibers and the energy source is permanent because the fiber itself is responsible for attracting the sunlight energy to the inside.

However, when the ceramic material having a high far infrared ray emissivity is mixed into the fiber as described above, if the content of the ceramic filler is low, the desired warming property can not be obtained. If the content of the conductive material is low, the static electricity generated by the ceramic material can not be removed. If the content of these components is high, there is a problem that the radiation workability is deteriorated.

A problem to be solved by the present invention is to provide a resin composition which can generate heat only by sunlight without a separate heating device by mixing a material having antimicrobial properties with heat generated by light in a resin during spinning of the fiber, Heat-resistant antibacterial fibers and fabrics which do not deteriorate comfortability.

In order to solve the above-mentioned problems, the present invention provides a process for producing a ferrite composite oxide, which comprises 25 to 95% by weight of a carbon compound and 5 to 75% by weight of at least one iron oxide compound selected from the group consisting of ferrous oxide, To 100 탆 and an iron oxide-carbon composition which generates heat by a long wave having a frequency of 300 ㎒ to 300 이 is contained in an amount of 1 to 10% by weight of the fibers.

At this time, the iron oxide-carbon composition may contain at least one metal oxide selected from the group consisting of aluminum oxide, calcium oxide, magnesium oxide, zinc oxide, manganese oxide, silicon dioxide, and titanium dioxide in an amount of 1 to 50 wt% It is preferable to further increase antimicrobial activity.

The carbon compound is preferably at least one selected from the group consisting of carbon black, charcoal powder, carbon powder, graphite powder, carbon fiber powder, carbon nanotube and graphene, and the metal oxide is preferably zeolite, , Bentonite, montmorillonite, ferrite, magnetite, pegmatite, tourmaline, sericite and loess.

The iron oxide compound is preferably spherical particles having a sphericity of 0.5 or more, and the iron oxide-carbon composition is preferably contained in the fibers through a process of mixing and spinning with the spinning solution.

The present invention also provides a fabric made of the above heat-generating antibacterial fiber.

Since the fibers and fabric according to the present invention generate heat by themselves, they can provide a warming effect even without a separate heating device, and they are excellent in keeping warmth, so that the influence of the human body due to changes in outside temperature is reduced, Since the particles provided have antibacterial activity, the fibers and fabrics containing them also exhibit antibacterial activity.

In addition, since the exothermic antibacterial particles have a fine particle size, there is no risk of cutting during spinning, and they are uniformly dispersed in the resin constituting the fibers and bonded to the resin. Therefore, they are not separated from the fibers due to external forces such as washing, Can provide a heat and an antibacterial effect.

Fig. 1 is a test report measuring the heat insulation property of the heat-resistant antibacterial fabric according to the present invention by the Korean Institute of Clothing and Textiles.
FIG. 2 and FIG. 3 are test results of a heat-generating antibacterial fabric according to the present invention, which was inspected by the Korean Institute of Clothing and Apparel Research and measured the heat generation by light irradiation.
FIG. 4 is a view showing an apparatus and conditions for measuring the exothermicity of FIG. 2 and FIG. 3. FIG.
FIGS. 5 to 8 are test results of the antimicrobial activity of the heat-resistant antimicrobial fabric according to the present invention measured by the Korean Institute of Clothing and Textiles.

The present invention relates to an antibacterial fiber, an antibacterial fiber product or an antibacterial fiber work product containing an iron oxide-carbon composition containing a iron oxide compound and a carbon compound which are heated by light in a constituent resin of a fiber and generating heat only by light irradiation without a separate heating device to provide.

The iron oxide-carbon composition that generates heat by the light can be obtained by mixing iron oxide compounds of iron oxide (FeO), ferric oxide (Fe ₂ O ₃ ), and iron ( _III ) tetraoxide (Fe ₃ O ₄ ) or a mixture thereof with carbon black, charcoal powder, Carbon nanotubes, carbon nanotubes (CNT), graphene, or a mixture thereof, and has a particle size of not more than a predetermined size, and is uniformly and rapidly irradiated by light It can generate heat.

Therefore, when the fiber is manufactured using the iron oxide-carbon composition, the fiber can generate heat by itself without a separate heating device, and since the composition particles that provide a heating effect have antibacterial activity, It also shows antibacterial activity.

Specifically, the present invention relates to a method for producing a carbon black powder, which comprises 25 to 95% by weight of at least one carbon compound of carbon black, charcoal powder, carbon powder, graphite powder, carbon fiber powder, carbon nanotube and graphene, Wherein the iron oxide-carbon composition comprises 5 to 75% by weight of an iron oxide compound in an amount of 1 to 10% by weight based on the total weight of the fibers, wherein the composition has a particle size of 10 nm to 100 占 퐉, And a fabric made of fibers.

Since the iron oxide-carbon composition contains a certain amount of iron oxide compounds of ferrous oxide, ferric oxide or iron tetroxide, which are stable oxides, and has a particle diameter of a certain size or less, when light is irradiated, The heat can be uniformly and rapidly generated by the heating and absorption heating method.

The optimum wavelength range at which the iron oxide-carbon composition can generate heat in the present invention is an electromagnetic wave having a frequency in the range of 300 MHz to 300 kV (wavelength 1 m to 1 m), and includes infrared rays, far infrared rays, microwaves, The far-infrared energy is absorbed by the carbon particles of the carbon compound to generate heat, and the microwave energy is absorbed by the iron oxide compound to generate heat.

Microwaves having a frequency between 300 MHz and 300 GHz induce molecular motion and ion conduction of the dielectric to generate heat. In the case of water, the change in the electric field of water molecules (electric dipoles) is slower than the change in microwave electric field, So that the vibrating heat is generated and heated.

On the other hand, metals can not be used for heating because they reflect most of the microwaves. However, when microwaves are irradiated to polar ferrous oxide, ferric oxide and iron (III) tetraoxide particles present in a stable form as in the present invention, The microwave absorbs heat to the non-conductive adult iron oxide compound while being absorbed and heated.

Since the iron oxide-carbon composition of the present invention has the characteristics of an intermediate semiconductor between a conductor and a non-conductor, absorption heating and induction heating are performed, and internal long wavelength waves are transmitted according to the charged state.

That is, when a continuous wave of iron oxide and carbon compound particles are applied to a continuous spherical iron oxide compound and a carbon compound particle, a long-wavelength wave is transmitted along the continuous particles due to the surface effect, and absorption heating and induction heating are also performed on adjacent particles.

For example, microwaves used in microwave ovens have long wavelengths that are widely used in everyday life. In this case, microwaves have a power of 0.2 to 3 kW at a frequency of 2.45 GHz.

When the fiber containing the iron oxide-carbon composition of the present invention is irradiated at a frequency of 2.45 GHz corresponding to the frequency of the microwave oven, the temperature may rise to 10 ° C or higher in about 1 minute. Can be changed according to the specific use.

In order to allow the composition to generate heat by light, particularly long wavelength waves, it is effective that the iron oxide compound is at least 5 wt% or more, preferably 10 wt% or more, more preferably 10 to 50 wt% If the amount is less than 10% by weight, the heat generation efficiency is low and it is difficult to expect a substantial heat generation effect.

The iron oxide compound can be obtained from magnetite powders, hematite powders, iron ore powders, steel making slag powders, copper smelting slag powders, zinc smelting slag powders, red mud powders, fly ash powders, loess powder, but is not limited thereto.

In order to further improve the heat generation and antibacterial effect of the composition, the composition may contain, in addition to the carbon compound and the iron oxide compound, aluminum oxide (Al ₂ O ₃ ), calcium oxide (CaO), magnesium oxide (MgO), zinc oxide (MnO ₂ ), silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ) or a mixture thereof in an amount of 1 to 50% by weight based on the total weight of the composition.

Polar substances such as ferrous oxide, ferric oxide and iron tetraoxide are appropriately mixed and distributed with the ceramic material of the metal oxide and have a stable structure by the action of each other.

When the microwave is irradiated to the particles existing in such a stable form, microwave energy oscillates the polar iron oxide compound and the metal oxide particles, and the microwave penetrates into the non-conductive ceramic material and absorbs heat to generate heat.

In addition, the above-mentioned metal oxide is heated to a very high temperature when light emitted from sunlight or a fluorescent lamp, particularly light with a short wavelength, is irradiated on the surface. Such a high temperature may cause incineration and decomposition of organic substances or bacteria attached to the surface of the metal oxide And the metal oxide itself acts as a catalyst for decomposing harmful substances and bacteria to provide an antibacterial effect on the fibers and fabrics of the present invention.

At this time, as the particle diameter of the metal oxide particles is smaller, the particles are heated rapidly and stably by the light, so that the antibacterial effect increases. Therefore, the particle diameter of the metal oxide particles is also in the range of 10 nm- 100 [mu] m.

In order to obtain heat and antibacterial effect by the metal oxide, it is possible that the metal oxide is contained in an amount of 1 wt% or more, but in order to obtain a better effect, it is preferably contained in an amount of 5 wt% or more, more preferably 5 to 30 wt%.

The metal oxide may be obtained from powders such as zeolite, ilite, bentonite, montmorillonite, ferrite, magnetite, pegmatite, tourmaline, sericite and loess, but is not limited thereto.

Generally, since the penetration depth of the microwave to the metal oxide-containing material is several tens times larger than that of water, the energy of the microwave can penetrate deeply into the metal oxide-containing material.

However, when the thickness of the material is thinner than the penetration depth, only a part of the energy of the supplied microwaves is absorbed by the material, and the energy that is not absorbed is not radiated from the material. However, when ferrous oxide, ferric oxide, The energy not reflected by the metal ions may be reflected by the metal ions and absorbed by the metal oxide containing material again.

At this time, if the shape of the iron oxide compound particles has a shape of a square, an acicular, an irregular, a plate, a polygon or the like, the reflectance is low and energy loss occurs. Therefore, in order to uniformly reflect the microwave, The spherical shape is more preferable and the sphericity is more preferably 0.5 or more.

The sphericity is a measure of how close the sphere is to the shape of the particle, which means the ratio of the smallest diameter to the longest side diameter of the particle. If the sphericity is less than 0.5, the particle is distorted Therefore, there is a possibility that the microwave converges to the leading edge of the grain edge, causing sparks. When the sphericity is 0.5 or more, the oscillation of the particles due to the microwave is active, thereby exhibiting the effect of heating and absorption heating.

The iron oxide-carbon composition described above is mixed with the spinning solution during spinning to give a heat and antibacterial effect to the fiber, and since it has a fine particle size, there is no fear of cutting during spinning. Since they are uniformly dispersed and bound to the resin constituting the fibers, they are not separated from the fibers due to external force such as washing, and thus, they can continuously provide heat and antibacterial effects.

If the iron oxide-carbon composition acting as described above is applied to fibers, textile products and fiber workpieces, heat can be generated by the light itself without a separate heating device, so that the fabric can be made of woven fabrics, knitted fabrics, nonwoven fabrics, clothes, It can be used in various applications requiring heat, keeping warm or antimicrobial effect such as mountain climbing, ski wear, ski wear, mountain climbing gear, tent, quilt, bedding, mattress, greenhouse, greenhouse, Not only can energy conservation be replaced by conventional energy conservation facilities, but it also has the advantage of keeping energy conservation while reducing the use of energy such as electricity and oil even in severe cold conditions.

Hereinafter, the present invention will be described in more detail with reference to the following examples.

It is to be understood, however, that the invention is not to be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Will be apparent to those skilled in the art to which the present invention pertains.

Example 1 Measurement of heat generation effect of fiber

Hereinafter, the heat-generating antibacterial fiber according to the present invention was irradiated with light and the temperature change was measured to confirm the exothermic effect of the fiber.

6 kg of a carbon compound in which carbon black, charcoal powder, carbon powder, graphite powder, carbon fiber powder, carbon nanotube and graphene were mixed at the same weight ratio, and 4 kg of iron oxide compounds of iron oxide, ferric oxide and iron To prepare 10 kg of three iron oxide-carbon compositions.

Further, each of the above compositions was mixed with 3 kg of metal oxide mixed in the same weight ratio of aluminum oxide, calcium oxide, magnesium oxide, zinc oxide, manganese dioxide, silicon dioxide and titanium dioxide to prepare three types of iron oxide- 13 kg was further prepared.

Each of the six compositions was added to the spinning solution of polyethylene terephthalate resin in an amount of 2% by weight and melt-spun to prepare a heat-generating antibacterial fiber.

The prepared heat-generating antibacterial fiber was cooled to room temperature, and the fiber temperature was adjusted to 20 ° C. The microwave (frequency 2.45 ㎓, output 2 kW) was irradiated to the heat-generating antibacterial fiber for 1 minute and then the temperature was measured The results are shown in Table 1 below.

For comparative evaluation, the temperature was measured in the same manner as above using the above three kinds of iron oxide-carbon compositions (carbon compound + iron oxide compound) as control 1 and common polyethylene terephthalate-based fibers as control 2, An exothermic antimicrobial fiber to which an iron oxide compound and a carbon compound are added; An exothermic antibacterial fiber to which an iron oxide compound, a carbon compound and a metal oxide are added; And control group 1;

Measurement result of heating effect by light Average temperature (℃) Heat-generating antibacterial fiber (carbon compound + iron oxide compound) 42 Heat-generating antibacterial fiber (carbon compound + iron oxide compound + metal oxide) 39 Control 1 165 Control group 2 23

As can be seen from the above results, the temperature of the control fiber 2, which is a common fiber, did not change significantly even after irradiating the microwave. The heat-generating antibacterial fiber according to the present invention was found to have a higher temperature than the control group 1 irradiated with microwave on the iron oxide- But the effect of increasing the temperature is remarkably larger than that of the conventional general fiber.

This result is attributable to the fact that the iron oxide-carbon composition generated by the microwave in the exothermic antimicrobial fiber is heated by the irradiation of the microwave to generate heat in the exothermic antimicrobial fiber.

The heat-generating antimicrobial fiber according to the present invention differs from the case where microwave is irradiated to the iron oxide-carbon composition itself, which is generated by light, because the composition is mixed with the resin and dispersed in the fiber, It is necessary to increase the temperature of the entire fiber, so that the rising temperature of the fiber is smaller than the rising temperature of the carbon composition itself.

As described above, a desired temperature can be obtained by controlling the amount and type of the iron oxide-carbon composition according to the present invention, the amount and type of the resin included in the fiber, the irradiation time and output of the light, etc.

≪ Example 2 > Measurement of heating effect of fabric

(# 1 - BIO - Heatsol) and # 2 - UA thermal cloth (# 2 - UA thermal cloth) which were woven with the heat - generating antibacterial fiber (carbon compound + iron oxide compound) And the warmth and heat generation were analyzed.

FIG. 1 shows the result of measuring the thermal effect by the method of KS K 0560: 2011 (method of measuring the warmth of cloth). The heat-generating antibacterial fabric of the present invention has a thermal insulation rate of 32.9% And the thermal insulation effect of the heat-generating antibacterial fabric according to the present invention was confirmed.

FIG. 2 and FIG. 3 show the result of measurement of the heating effect by the method of FIG. 4. As a result of irradiation at a distance of 50 cm from the incandescent lamps of 220 V, 500 W, and 3200 K for 60 minutes, The temperature of the antimicrobial fabric of the present invention showed a temperature rise of 14.84 ° C at 60 minutes after the rapid increase of temperature, but the temperature of the heated fabric of the present invention increased by only 12.40 ° C after 60 minutes.

Based on these results, the heat-generating antibacterial fabric according to the present invention can efficiently utilize light energy by complementing and synergizing the iron oxide compound of ferrous oxide, ferric oxide and iron tetroxide and carbon compounds contained in the fiber, It is possible to provide a more improved heat generation and heat insulation effect as compared with the general fiber and heat generation fabric produced by the method of FIG.

<Example 3> Measurement of antibacterial effect of fiber

The heating antimicrobial fiber (carbon compound + iron oxide compound) of Example 1 was prepared in the form of cotton, and the drying speed, frictional electrification voltage, deodorization rate and antibacterial degree were analyzed by the Korea Apparel Testing and Research Institute.

Fig. 5 shows the measurement results of the drying speed and the friction voltage. The drying speed was 600 minutes as measured by KS K 0815, 6.28.1: 2008 method, and the friction voltage was measured by KS K 0555: 2010 B method (Friction Voltage Measurement), the frictional frictional force was measured at 8400 V and the frictional frictional force at 6300 V.

FIG. 6 shows the result of measuring the deodorization rate using ammonia (NH ₃ ) gas using a gas detection tube method. The deodorization rate was 61% (30 minutes), 65% (60 minutes), 70% Min.) And 75% (120 minutes). It can be seen that the pyrogenic antimicrobial fiber containing the iron oxide-carbon composition of the present invention continuously decomposes ammonia over time and gradually removes the smell.

Staphylococcus aureus ATCC 6538) and pneumoniae ( Klebsiella pneumoniae ATCC 4352) were measured in accordance with the KS K 0693: 2011 method. As a result, both strains showed a bacterium reduction rate of 99.9% or more as shown in Fig.

FIG. 8 shows the result of a comparative test using a cotton of a common polyethylene terephthalate fiber material as a control, which has not been subjected to heat-generating antibacterial treatment. In the Petri dish of the control piece, a large number of colonies are formed in both strains, The formation of colonies was not observed in the test piece of the present invention, and the antimicrobial effect of the heat-generating antibacterial fiber according to the present invention can be confirmed from this.

Claims (7)

And 5 to 75% by weight of at least one iron oxide compound selected from the group consisting of ferric oxide, ferric oxide and iron (III) oxide, and having a particle size of 10 nm to 100 탆 and a frequency of 300 ㎒ to 300 ㎔ Wherein the iron oxide-carbon composition generated by the long-wavelength waves of the iron oxide-carbon composition contains 1 to 10% by weight of the fibers. The method according to claim 1,
Wherein the carbon compound is at least one selected from the group consisting of carbon black, charcoal powder, carbon powder, graphite powder, carbon fiber powder, carbon nanotube and graphene. The method according to claim 1,
The iron oxide-carbon composition may further comprise at least one metal oxide selected from the group consisting of aluminum oxide, calcium oxide, magnesium oxide, zinc oxide, manganese dioxide, silicon dioxide and titanium dioxide in an amount of 1 to 50 wt% Wherein the antimicrobial fiber is a thermally activated antimicrobial fiber. The method of claim 3,
Wherein the metal oxide is produced from at least one powder selected from the group consisting of zeolite, ilite, bentonite, montmorillonite, ferrite, magnetite, pegmatite, tourmaline, sericite and loess. The method according to claim 1,
Wherein the iron oxide compound is composed of spherical particles having a spherical degree of 0.5 or more. The method according to claim 1,
Characterized in that the iron oxide-carbon composition is contained in the fiber through a process of being mixed with the spinning liquid and radiated. A fabric made from the heat-generating antibacterial fiber of any one of claims 1 to 6.

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