KR102648969B1 - Heating carbon cement composite composition for floor heating and manufacturing method thereof - Google Patents

Abstract

The present invention relates to cement; Waste cathode material, solid capsule containing liquid waste carbon nanotubes (CNT); and carbon fiber; wherein the carbon fiber is a modified activated carbon fiber activated by carbonizing the carbon fiber, and the modified activated carbon fiber is immersed in liquid waste carbon nanotubes and then dried to form a surface pore of the modified activated carbon fiber. The present invention relates to a heat-generating carbon cement composite composition for floor heating, wherein liquid waste carbon nanotubes are adsorbed and further comprising methyl methacrylate crosspolymer to improve thermal stability to control deterioration due to periodic exposure to high temperatures. .

Description

Heating carbon cement composite composition for floor heating and manufacturing method thereof}

The present invention relates to a heat-generating carbon cement composite composition with improved heat generation efficiency by adding a waste cathode material and a solid capsule molded to contain liquid waste carbon nanotubes (CNTs) for floor heating, and a method for manufacturing the same.

In general, concrete is needed for the construction of various structures such as houses, roads, bridges, high-rise buildings, and dams, and its utilization is so significant that it is difficult to escape the influence of concrete in modern society.

Among these concretes, heating concrete has improved electrical conductivity and is used for floors and walls of residential or production facilities, airport runways, icy areas on roads, and bridges to reduce the labor required to remove snow or ice during heavy snowfall or freezing. It is used in various temperature ranges such as heating construction and building facilities, such as railroad branch facilities, greenhouses, and agricultural product drying facilities.

As an example of the prior art, in Korean Patent Registration No. 10-1654478, in the concrete manufacturing method, the Masato aggregate preparation step (S100) of preparing 30 to 40% by weight of Masato aggregate based on 100% by weight of the total concrete; Auxiliary materials consisting of 3 to 7% by weight of red clay, 3 to 6% by weight of fine limestone powder, 10 to 20% by weight of cement, 5 to 7% by weight of fine slag powder, and 20 to 40% by weight of water, based on the total 100% by weight of concrete. Preparation of auxiliary materials (S200); Graphene solution preparation step (S300) of preparing 0.1 to 6% by weight of graphene solution based on 100% by weight of total concrete; A mineral bonding material preparation step (S400) of preparing 3 to 7% by weight of a mineral bonding material based on 100 weight% of the total concrete; And a mixing step (S500) of mixing the mass soil aggregate, red clay, limestone fine powder, cement, slag fine powder, water, graphene solution, and mineral bonding material, including the graphene solution preparation step (S300) ), the graphene solution was prepared by heating 50 ml of sulfuric acid (H2SO4) to 90°C using a hot water boiler, adding 10 g of potassium persulfide (K2S2O8) and 10 g of phosphorus pentoxide, stirring until all dissolved, and stirring until dissolved. After cooling the mixed solution to 80℃, add 12g of graphite and react for 4~5 hours, then stop heating and dilute with 2L of distilled water while stirring for 12 hours. Pass the diluted solution through a 0.2㎛ nylon filter. Filter out the graphite using a , extract only the solution, prepare the extracted solution by placing a 2L beaker in a constant temperature bath at 0℃, add 460mL of sulfuric acid to the beaker, add the pretreated graphene to the beaker, stir, and pour the mixture into the beaker. Add 60g of potassium permanganate (KMnO4) and stir until completely dissolved. Then, take out the beaker and place it in a thermostat at 35℃ and stir for 2 hours. The mixture is then placed in a thermostat at 0℃ while maintaining the temperature at 40~50℃ with 920mL of distilled water. Divide into 20-30mL portions and stir for 2 hours, then add 2.8L of water and stir and dilute for 3 hours. Add 20-30% by weight of hydrogen peroxide (H2O2) based on 100% by weight of the diluted product, then add hydrogen chloride. A method for producing conductive heating concrete containing graphene is proposed, which is characterized in that the graphene solution has a pH of 5 to 7 obtained by adding water mixed with (HCl) and distilled water in a volume ratio of 1:2. .

However, in the case of the above technology, it is attempted to provide conductivity using graphene, but in the case of such graphene, it is not easy to disperse, so it is easy to form conductive disconnected sections in the paste, so it is difficult to expect excellent heat generation efficiency with low energy.

Republic of Korea Patent Registration No. 10-1654478

Therefore, the present invention was developed to solve the above-mentioned problems. By adding waste carbon nanotubes and waste cathode materials, the heat generation function is achieved, but by improving electrical conductivity, etc., sufficient heat generation efficiency can be expected even with a small amount of energy. The purpose is to provide a carbon cement composite composition suitable for floor heating and a method for manufacturing the same.

As a means to solve the above-mentioned problems, the exothermic carbon cement composite composition for floor heating of the present invention (hereinafter referred to as “the composition of the present invention”) includes cement; Waste cathode material, solid capsule containing liquid waste carbon nanotubes (CNT); and carbon fiber; wherein the carbon fiber is a modified activated carbon fiber activated by carbonizing the carbon fiber, and the modified activated carbon fiber is immersed in liquid waste carbon nanotubes and then dried to form a surface pore of the modified activated carbon fiber. Liquid waste carbon nanotubes are adsorbed, and methyl methacrylate crosspolymer is added to improve thermal stability to control deterioration due to periodic exposure to high temperatures.

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As an example, the liquid waste carbon nanotubes include epoxidized amine.

Meanwhile, the method for manufacturing a heat-generating carbon cement composite for floor heating of the present invention (hereinafter referred to as the “manufacturing method of the present invention”) includes the step of manufacturing a solid capsule containing a waste cathode material and liquid waste carbon nanotubes (S10). ); A step of carbonizing carbon fibers, immersing the activated carbon fibers in liquid waste carbon nanotubes, and then drying them to produce modified activated carbon fibers in which the liquid waste carbon nanotubes are adsorbed to the surface pores of the activated carbon fibers (S20); And a step (S30) of mixing and stirring cement, the solid capsule prepared in steps S10 and S20, and a composition containing methyl methacrylate crosspolymer for improving thermal stability in addition to modified activated carbon fiber. It is characterized by

The composition of the present invention and its manufacturing method not only reduce the manufacturing cost by using industrial by-products and waste resources, but are also environmentally friendly, and use a solid capsule containing waste cathode material and waste carbon nanotubes as a binder for 30 hours. It has the advantage of being applied and used as a cement composite for floors as it is very easy to construct and work by developing a heat generation function of ℃ or higher.

1 is a diagram showing an application example of the composition of the present invention.
Figure 2 is a photograph showing a solid capsule according to an embodiment of the present invention.
Figure 3 is an enlarged photograph showing dispersed liquid waste carbon nanotubes according to an embodiment of the present invention.
Figure 4 is a graph showing exothermic test results for embodiments of the present invention.

In describing the present invention, the terms and words used in the specification and claims are based on the principle that the inventor can appropriately define the concept of the term in order to explain the invention in the best way. It must be interpreted with meaning and concepts consistent with the technical ideas of.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The composition of the present invention includes cement and a solid capsule, and in particular, in the case of the solid capsule, a discarded negative electrode material of a lithium secondary battery (hereinafter referred to as "waste negative electrode material"), liquid waste carbon nanotubes (CNT), It may be composed of a high-performance water reducing material and a high-performance fluidizing agent.

As shown in Figure 1, the composition of the present invention is poured into a cement composite for flooring, and a steel wire mesh, which generates heat by applying electricity, is embedded inside this cement composite for flooring, causing the floor to be damaged by heat generation from the steel wire mesh. By ensuring that the cement composite generates heat above 30℃, it can be sufficiently applied for heating in the winter.

Preferably, it is reasonable to mix 100 to 300 parts by weight of steelmaking slag aggregate and 0.01 to 1 part by weight of solid capsules per 100 parts by weight of cement.

First, as shown in FIG. 2, the solid capsule presented in the present invention has a capsule shape by mixing the above compositions to be suitable for use as a binder and molding it to a diameter and length within a preset range.

At this time, a suitable molding machine for forming the capsule shape can be selected from various known molding machines such as an extrusion molding machine, and detailed description thereof will be omitted.

The waste carbon nanotubes are waste materials generated during the production process of carbon nanotubes (CNTs). Some are used in activated carbon products, and most are landfilled or incinerated. Carbon nanotubes, a nano material, penetrate into the soil or It is difficult to assess the impact of pollutants generated during incineration.

Accordingly, in the present invention, waste carbon nanotubes, that is, waste carbon nanotubes, are added as a component of the solid capsule to enable recycling, and a heating effect can be expressed according to the electrical conductivity of the carbon nanotubes, thereby making the solid capsule The same heating effect can be achieved in concrete using as a binder.

Waste carbon nanotubes according to a preferred embodiment of the present invention can be added to the solid capsule as a dispersion of waste carbon nanotubes that has undergone a dispersion process in a liquid aqueous solution.

Specifically, the waste carbon nanotube dispersion may be prepared to include waste carbon nanotubes, water, and a polycarboxylic acid-based water reducing agent.

In other words, a dispersion of waste carbon nanotubes is prepared by diluting and dispersing waste carbon nanotubes with water, and uniform dispersion can be achieved using a polycarboxylic acid-based water reducing agent.

Typically, carbon nanotube particles generate inter-particle attraction due to strong Van der Waals attraction, which results in self-aggregation.

Also, due to the above-described characteristics of carbon nanotubes, there is a limit to dispersing the carbon nanotube particles themselves into fine particles in the paste and maintaining the dispersibility of the dispersed fine particles.

In particular, carbon nanotubes have a very low specific gravity, so they are not evenly distributed when mixed, and because they float to the surface, it is difficult to achieve uniform dispersion.

Accordingly, according to this embodiment, the polycarboxylic acid-based water reducing agent is further included in the dispersion to ensure uniform dispersion when dispersing the liquid waste carbon nanotubes.

Figure 2 is a photograph of dispersed liquid waste carbon nanotubes magnified 100,000 times, and it can be seen that the uniform dispersion effect was achieved due to the addition of the polycarboxylic acid-based water reducing agent.

In particular, in the case of polycarboxylic acid-based water reducers, when mixed into concrete and cement mortar, even a small amount can strongly disperse cement particles, reducing the amount of water used by about 20 to 30%, thereby dramatically increasing smooth work and strength. Not only can it reduce the amount of graphite used in waste cathode materials as explained in, but it can also help with the surface activation function when dispersing waste carbon nanotubes.

Here, it is natural that the mixing ratio of the waste carbon nanotubes, water, and polycarboxylic acid-based water reducing agent constituting the waste carbon nanotube dispersion can be selectively adjusted by various factors such as the concentration or use of the waste carbon nanotubes.

Additionally, when classifying waste carbon nanotubes, single-walled carbon nanotubes (SWCNTs), which have a tube shape with one wall made of carbon atoms, have the best electrical and thermal conductivity, and double-walled nanotubes (SWCNTs) which have two walls made of carbon atoms. (Double-wall Nanotube) has excellent electrical conductivity and mechanical properties, while Multi-Wall Carbon Nanotube (MWCNT), which has a tube shape with multiple walls made of carbon atoms in one tube, has somewhat poorer electrical and thermal properties but has better mechanical properties. Since it is known to be excellent and easy to manufacture and has a wide range of applications, it is desirable to select and add waste carbon nanotubes suitable for the purpose of use of the solid capsule of the present invention.

Meanwhile, the solid capsule of the present invention further includes a waste cathode material in order to develop the electrical conductivity of the paste.

Lithium secondary batteries, which are generally used in electric vehicles and small home appliances, are composed of an anode, a cathode, a separator, and an organic electrolyte, and transition metal oxides are used as anode materials and carbon is used as a cathode material.

The above-mentioned waste cathode material is made of cathode material from lithium secondary batteries discarded after use in the above-mentioned electric vehicles and small home appliances. These waste cathode materials include artificial graphite, natural graphite, low-crystalline carbon (pitch/coke, thermosetting resin). , As high-purity carbon composite systems such as metal systems (siox, si carbon composite systems) are included, the heating effect due to electrical conductivity can be expressed by being added together with the waste carbon nanotubes.

In addition, the price of graphite currently used ranges from 10,000 to 80,000 won/kg, and when a large amount of graphite is mixed into cement composites, difficulties arise in research and development and product production due to cost limitations.

Accordingly, in the present invention, by utilizing waste cathode material generated from waste lithium secondary batteries, it is possible to secure price competitiveness of 1/20 to 1/50 or more compared to existing graphite products. In particular, recycling of discarded waste cathode material ensures resource circulation. and environmental pollution can be prevented.

Meanwhile, in order to develop a certain conductive performance or strength enhancement performance, networking must be formed between waste carbon nanotubes or waste cathode materials as fillers, and in order to form good networking between these fillers, the long axis ratio is better than the waste cathode material with a small long axis ratio. Waste carbon nanotubes, which have a much larger ratio, are absolutely advantageous.

In other words, waste carbon nanotubes with a large long axis ratio exhibit excellent electrical conductivity even with a small amount, while waste cathode materials with a small long axis ratio require a much larger amount than waste carbon nanotubes.

The solid capsule may further include a high-performance water reducing agent and a high-performance fluidizing agent. In this case, the high-performance water reducing agent and the high-performance fluidizing agent may be mixed with the waste cathode material and the liquid waste carbon nanotubes, and the molding of the solid capsule is completed. It may then be applied to the surface of the capsule to provide a coating layer.

These high-performance water reducing agents and high-performance fluidizing agents enable the effect of reducing the water-cement ratio to be expressed when the solid capsule of the present invention is added to concrete or cement mortar as a binder.

The composition of the present invention described above is preferably mixed to include 5 to 20 parts by weight of waste cathode material, 0.01 to 1 part by weight of high-performance water reducing agent, and 0.01 to 1 part by weight of high-performance fluidizing agent per 100 parts by weight of liquid waste carbon nanotubes. .

Meanwhile, it is reasonable that the cement is a type 1 ordinary Portland cement.

The steelmaking slag used to produce the steelmaking slag aggregate is not limited, and it is generally preferable to use the steelmaking slag in the upper layer of the port where the steelmaking slag is received and transferred. The lower layer of the pot tends to have a high metal content and the upper layer tends to have a low metal content, so using steelmaking slag from the upper layer is economically advantageous compared to using the lower layer containing high metal content.

In addition, since the method of producing steelmaking slag aggregate using steelmaking slag can apply various known technologies, detailed description thereof will be omitted.

On the other hand, when pouring the composition of the present invention, the problem of drying shrinkage due to moisture evaporation may occur during the curing process. In particular, in the case of floors poured with the composition of the present invention, deterioration is caused by exposure to high temperatures due to periodic heat generation. There may be a problem of reduced strength.

Accordingly, in the present invention, in addition to the above compositions, methyl methacrylate crosspolymer is added to control drying shrinkage as well as control deterioration due to periodic high temperature exposure. The methyl methacrylate crosspolymer has a network structure, making the bond with the paste relatively strong and increasing viscosity. Accordingly, the thermal stability can be improved and the maintenance of strength, etc. can be increased even when the paste is periodically exposed to high temperatures.

Preferably, it is reasonable to mix 0.01 to 1 part by weight of methyl methacrylate crosspolymer with respect to 100 parts by weight of cement.

The composition of the present invention may further include carbon fiber in addition to the above compositions.

By incorporating carbon fiber in this way, crack resistance is improved through crosslinking. In particular, since carbon fiber also has electrical conductivity, electrical conductivity is imparted to the paste.

In addition, when a crack occurs in concrete, a conductive disconnection section is formed at the crack. The addition of carbon fiber solves this problem by controlling the cracking of the paste through the crosslinking action of the carbon fiber.

Preferably, it is reasonable to mix 0.01 to 1 part by weight of carbon fiber per 100 parts by weight of cement.

More preferably, the carbon fiber may be modified carbon fiber to achieve higher electrical conductivity.

The modified carbon fiber is characterized in that it is a modified carbon fiber in which liquid waste carbon nanotubes are applied to the surface of carbonized carbon fiber. The reason why liquid waste carbon nanotubes are applied to the surface of the carbonized carbon fiber in this way is to form more pores on the surface of the carbon fiber by carbonization, and to allow the waste carbon nanotubes to be adsorbed into more pores. By doing this, a large amount of waste carbon nanotubes are applied uniformly throughout the carbon fiber, thereby improving electrical conductivity.

In other words, the modified carbon fiber is made by modifying carbon fiber into activated carbon fiber and allowing waste carbon nanotubes to be adsorbed into the surface pores of the modified activated carbon fiber, thereby allowing secondary modification.

These activated carbon fibers are manufactured by carbonizing carbon fibers, and any one of rayon-based fibers, acrylic-based fibers, phenol-based fibers, and pitch-based fibers can be used as the carbon fiber. As a method of carbonizing carbon fiber and activating it into activated carbon fiber, any one of a thermal decomposition process, an oxidation process using heat treatment, or a thermochemical activation process can be used.

First, explaining the pyrolysis process, activated carbon fiber can be manufactured by pyrolyzing carbon fiber at a temperature of 600 to 900°C under an inert gas atmosphere such as argon or nitrogen. In addition, the oxidation process using heat treatment is a method of producing activated carbon fiber by oxidizing carbon fiber under an oxidizing atmosphere such as oxygen or water vapor, and the thermochemical activation process is a method of producing activated carbon fiber by mixing carbon fiber with acid, base, and salt and A method of activating carbon fiber into activated carbon fiber by applying a temperature of 900°C can be applied.

Next, the activated carbon fibers prepared in this way are immersed in the liquid waste carbon nanotubes and then dried to produce the final modified carbon fibers.

In addition, an example is presented in which epoxidized amine is included in liquid waste carbon nanotubes used in the production of modified carbon fiber. As mentioned above, in the case of the modified carbon fiber, as the electrical conductivity improves, there may be a problem of cohesion between fibers due to static electricity. To solve this, the liquid waste carbon nanotubes are further included with epoxidized amine to form the fiber. This is to control liver aggregation.

It is appropriate that the epoxidized amine is mixed in an amount of 0.01 to 0.1 parts by weight based on the total weight of liquid waste carbon nanotubes.

Hereinafter, embodiments of the present invention will be described through experimental examples.

<Solid capsule manufacturing example>

Preparing a mixture by mixing and stirring 10 parts by weight of waste carbon nanotubes, 10 parts by weight of waste cathode material, and 0.05 parts by weight of a polycarboxylic acid-based water reducing agent with respect to 100 parts by weight of water, and forming the mixture into a mixture having a diameter of 1 mm and a length of 2 mm. Solid capsules are manufactured through an extrusion molding step.

<Sample preparation example>

In Example 1, 150 parts by weight of steel slag aggregate and 0.1 parts by weight of solid capsules were mixed for 100 parts by weight of cement. In Example 2, the mixture was mixed in the same manner as Example 1, but methyl methacrylate was added. This is an example in which 0.1 parts by weight of crosspolymer was added, Example 3 was the same as Example 2, but 0.1 parts by weight of carbon fiber was added, and Example 4 was the same as Example 3, but the carbon fiber was carbonized. This is an example of a mixture of modified carbon fibers in which liquid waste carbon nanotubes (mixed with 10 parts by weight of waste carbon nanotubes and 0.05 parts by weight of polycarboxylic acid-based water reducing agent per 100 parts by weight of water) were applied to the surface of the prepared carbon fibers, Example 5 In the case of Example 4, the surface of the activated carbon fiber was modified using liquid waste carbon nanotubes, except that 0.01 parts by weight of epoxidized amine was added based on the total weight of the liquid waste carbon nanotubes during production of the modified carbon fibers.

<Compressive strength and heat generation test>

For each of these samples, a compressive strength test (28 days) was performed according to KS L ISO 679, and in the case of 91-day compressive strength, room temperature conditions (approximately 18℃) and high temperature conditions (approximately 50℃) were used from the 28th to the 91st day. The measurements were repeated and the results are shown in Table 1 below.

In addition, a heat generation test was performed on the samples. The samples were constructed with a stainless steel mesh net electrically connected to a formwork with dimensions of 900 × 900 × 50 cm embedded as a heating means, and electricity was applied to determine the temperature within the cement composite. was measured, and the results are shown in Figure 4.

division Compressive strength (28 days, MPa) Compressive strength (91 days, MPa) Example 1 26 24 Example 2 28 30 Example 3 25 - Example 4 25 - Example 5 26 -

In terms of 28-day compressive strength, as shown in Table 1 above, it can be seen that Example 2 is slightly better than Example 1. This is because in Example 2, more methyl methacrylate crosspolymer was added to reduce drying shrinkage. It is believed to be due to control such as etc. In addition, it can be seen that Examples 3 to 5 are slightly lower in compressive strength than Example 2, which is believed to be due to the addition of more carbon fiber.

Meanwhile, looking at the 91-day compressive strength, it can be seen that in the case of Example 1, it is rather reduced compared to the 28-day compressive strength, while in the case of Example 2, it can be seen that the compressive strength does not decrease even when exposed to periodic high temperatures. This is believed to be due to the addition of more methyl methacrylate crosspolymer.

Meanwhile, in terms of heat generation efficiency, as shown in FIG. 4, it can be seen that Example 3 has better heat generation efficiency than Examples 1 and 2. This is due to the addition of more carbon fiber, and Example 3 It can be seen that Example 4 has better heat generation efficiency. As mentioned above, this is believed to be due to further improvement in electrical conductivity by modifying the carbon fiber, and Example 5 shows the best results. It can be seen that is derived, which is believed to be due to the addition of epoxidized amine to the liquid waste carbon nanotubes used in carbon fiber modification to control fiber aggregation.

Meanwhile, the manufacturing method of the present invention includes manufacturing a solid capsule containing a waste cathode material and liquid waste carbon nanotubes (S10); Producing modified carbon fiber by impregnating liquid waste carbon nanotubes with carbonized carbon fiber (S20); And a step (S30) of mixing and stirring cement and a composition containing the solid capsule and modified carbon fiber prepared in steps S10 and S20.

First, step S10 is a process for manufacturing a solid capsule, including preparing a waste carbon nanotube dispersion (S100) and mixing waste cathode material with the waste carbon nanotube dispersion and stirring to prepare a first mixture. (S200), mixing and stirring a high-performance water reducing agent and a high-performance fluidizing agent in the first mixture to prepare a second mixture (S300), and extruding the second mixture to a size having a diameter and length within a preset range. It may include a step of molding (S400) and a step of drying the molded product formed in step S400 (S50).

That is, in the solid capsule, liquid waste carbon nanotubes are first manufactured, and then the liquid waste carbon nanotubes and the waste cathode material are mixed and first stirred. At this time, the liquid waste carbon nanotubes are liquid waste carbon nanotubes as mentioned above. It may be a dispersion of waste carbon nanotubes dispersed in an aqueous solution.

Looking specifically at the manufacturing process of the solid capsule, in step S100, waste carbon nanotubes, water, and a polycarboxylic acid-based water reducing agent are mixed in a stirring container, and then an ultrasonic generator is operated to produce a waste carbon nanotube dispersion.

Here, since various known technologies exist for the ultrasonic generator, a detailed description thereof will be omitted.

However, when dispersing waste carbon nanotubes using a polycarboxylic acid-based water reducing agent, micro-heat is generated due to collisions between waste carbon nanotubes, which may boil the length of the waste carbon nanotubes or cause functional deterioration due to friction, so the internal temperature may decrease. It is desirable to carry out dispersion while preventing quality changes due to heat generation of liquid waste carbon nanotubes by maintaining a constant temperature of 50°C or lower.

Afterwards, a first mixture is prepared by mixing and stirring the waste cathode material with the waste carbon nanotube dispersion prepared in step S100 (S200), and then mixing and stirring a high-performance water reducing agent and a high-performance fluidizing agent in the first mixture to form a second mixture. A mixture is prepared (S300).

After the step (S300) of preparing the second mixture as described above, the step (S400) of extruding the second mixture into a capsule shape having a diameter and length within a preset range is performed using a high-performance vacuum extrusion molding machine. .

The capsule size is set to a range of 1 to 60 mm in diameter and 5 to 100 mm in length, suitable for use as a binder for concrete or cement mortar.

Finally, a step (S500) of drying the capsule-shaped molded product in step S400 is performed. It is preferable to dry the molded product so that the water content of the molded product is 0.1 to 30%.

Next, there is a step (S20) of producing modified carbon fiber by impregnating liquid waste carbon nanotubes with carbonized carbon fiber. As mentioned above, carbonized carbon fiber is activated carbon produced by various known methods. It is a fiber, and these activated carbon fibers are impregnated with liquid waste carbon nanotubes and then dried to produce modified carbon fibers.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims are also possible. falls within the scope of rights.

Claims (6)

cement; Waste cathode material, solid capsule containing liquid waste carbon nanotubes (CNT); And carbon fiber;
The carbon fiber is,
It is a modified activated carbon fiber activated by carbonizing carbon fiber. The modified activated carbon fiber is immersed in liquid waste carbon nanotubes and then dried, and the liquid waste carbon nanotubes are adsorbed on the surface pores of the modified activated carbon fiber.
A heat-generating carbon cement composite composition for floor heating, further comprising methyl methacrylate crosspolymer to improve thermal stability and controlling deterioration due to periodic high temperature exposure.
delete delete delete According to clause 1,
A heat-generating carbon cement composite composition for floor heating, wherein the liquid waste carbon nanotubes include epoxidized amine.
Manufacturing a solid capsule containing waste cathode material and liquid waste carbon nanotubes (S10);
A step of carbonizing the carbon fiber, immersing the activated carbon fiber in liquid waste carbon nanotubes, and then drying them to produce a modified activated carbon fiber in which the liquid waste carbon nanotubes are adsorbed to the surface pores of the activated carbon fiber (S20); and
A step (S30) of mixing and stirring cement, the solid capsule prepared in steps S10 and S20, and a composition containing methyl methacrylate crosspolymer to improve thermal stability in addition to modified activated carbon fiber. Method for manufacturing a heat-generating carbon cement composite for floor heating.