KR20200059011A - Manufacturing method of copper-zinc nano particles using hydrothermal synthesis method, copper-zinc nano particles using the same and antibacterial latex foam containing the same - Google Patents

Abstract

The present invention relates to a manufacturing method of copper-zinc nanoparticles using a hydrothermal synthesis method, copper-zinc nanoparticles manufactured thereby and an antibacterial latex foam containing the same. In particular, according to a manufacturing method of copper-zinc nanoparticles using a hydrothermal synthesis method, copper-zinc nanoparticles manufactured thereby and an antibacterial latex foam containing the same, copper-zinc nanoparticles are manufactured by means of a hydrothermal synthesis method using a reducer with a hydroxyl group before being added to latex to be foamed and hardened along therewith to manufacture an antibacterial latex foam, thereby embodying excellent antibiosis. Moreover, a colloidal solution is manufactured by using the copper-zinc nanoparticles, before the latex foam comes in contact therewith (is immersed therein or is sprayed thereto). Accordingly, the colloidal solution is applied or deposited on the outer surface of the latex foam and the surface of an internal pore to manufacture the antibacterial latex foam, thereby embodying excellent antibiosis.

Description

MANUFACTURING METHOD OF COPPER-ZINC NANO PARTICLES USING HYDROTHERMAL SYNTHESIS METHOD, COPPER-ZINC NANO PARTICLES USING THE SAME AND ANTIBACTERIAL LATEX FOAM CONTAINING THE SAME}

The present invention is to prepare a copper-zinc nanoparticles by hydrothermal synthesis method using a reducing agent having a hydroxyl group, and to apply it to produce an antimicrobial latex foam to enable excellent antimicrobial properties.

In general, latex foam is a material having excellent elasticity and high porosity made from natural rubber or synthetic rubber latex or a mixture thereof, and can exhibit ventilation and resilience. Due to this performance, mattresses, pillows, sofas, car seats, shoes, etc. It is used as a shock absorber to alleviate shock and friction.

On the other hand, in order to provide a hygienic and comfortable living environment, latex foam requires improved antibacterial properties. Natural rubber latex foam has some antibacterial properties in itself, but it is very weak. Therefore, a method capable of enhancing the antibacterial properties of the latex foam is required.

As a related prior art, Patent Document 1 discloses a method of manufacturing an antibacterial latex foam using silver nanoparticles as an antibacterial agent. In addition, Patent Document 2 discloses an example of using copper as a bioactive component in order to obtain a bioactive anionic polymer latex.

However, in the case of Patent Document 1, there is a problem that the antibacterial property is not only insufficient, and the manufacturing cost is particularly expensive. More specifically, when comparing silver (Ag) and copper (Cu) in terms of cost, copper having a much lower price is advantageous. Looking at the purchase price of water-soluble silver compound, the main raw material of silver nanoparticles, 99.8% of Silver (I) nitrate is about 537,500 won for 500g, while 97% of copper (II) chloride dihydrate is only 16,300 won for 500g. , It is expected that the use of copper as an antibacterial agent for imparting antibacterial properties to latex foam is very promising.

However, Patent Document 2 using copper alone also has a problem that antimicrobial properties do not reach a satisfactory level.

On the other hand, Non-Patent Document 1 discloses data on the antibacterial properties of zinc-doped copper nano compounds.

However, compared to the case of Non-Patent Document 1, copper compounds and zinc compounds that can be used are diversified, and furthermore, substances used as reducing agents are not limited to sodium hydroxide, but substances having hydroxyl groups (water, methanol, ethanol, Glycerin, butylene glycol, glucose) to increase compatibility. In addition, without using acetic acid, the reaction time was shortened to simplify the process.

On the other hand, the applicant of the present invention, unlike non-patent document 1, draws copper-zinc nanoparticles by hydrothermal synthesis using various materials and derives excellent antibacterial properties when applied to latex foam, thereby completing the present invention. Did.

Patent Document 1: Republic of Korea Patent Registration No. 10-0495530 "Antibacterial latex foam containing silver nanoparticles and a method for manufacturing the same" Patent Document 2: US Patent Publication No. 2008/0057049 "Cationic latex as a carrier for bioactive ingredients and methods for making and using the same

Non-Patent Document 1: Facile synthesis of Zn doped CuO hierarchical nanostructures: Structural, optical and antibacterials properties (Javed Iqbal and 7 others, AIP Advances (2015, Vol. 5, No. 12) 127112p ~ 127112p)

The present invention is to prepare a copper-zinc nanoparticles by hydrothermal synthesis method using a reducing agent having a hydroxyl group, add them to the latex, and then foam and cure together to produce an antibacterial latex foam, thereby making it possible to implement excellent antibacterial properties. do.

In addition, the present invention is to prepare a colloidal solution using the copper-zinc nanoparticles as described above, and contact the latex foam (immersion or spraying, etc.) to the colloidal solution on the outer surface and inner pores of the latex foam. Another object is to make it possible to implement excellent antibacterial properties by applying or supporting it to prepare an antibacterial latex foam.

The present invention is a method for producing copper-zinc nanoparticles by hydrothermal synthesis method, after dissolving a copper compound in an aqueous reaction medium, doping a zinc compound (S100); and having a hydroxyl group after the S100 step. A step of dropping the reducing agent and reducing and combining copper and zinc (S200); And, characterized in that it comprises a; step (S300) of washing, filtering, drying and calcining the reacted product through the step S200; and a method for producing copper-zinc nanoparticles by hydrothermal synthesis The copper-zinc nanoparticles produced by this are used as a solution to the problem.

In addition, the present invention makes the antibacterial latex foam prepared by adding and curing the copper-zinc nanoparticles prepared as described above by foaming and curing together as another solution for the problem.

In addition, the present invention is to prepare a colloidal solution using copper-zinc nanoparticles prepared as described above, and contact the latex foam (immersion or spraying, etc.) to the colloid on the outer surface and inner pore surface of the latex foam. An antibacterial latex foam prepared by applying or supporting a solution is another solution to the problem.

The present invention has the effect of implementing excellent antibacterial properties as shown in [Table 1] and [Table 2] to be described later. In addition, it can be applied to all fields where mattresses, pillows, sofas, car seats, shoes, as well as latex foams are used. In particular, it has the effect of realizing excellent antibacterial properties at a relatively low cost compared to silver (Ag). In addition, the copper-zinc compound thus prepared can be applied not only to latex, but also to fibers such as paper and non-woven fabrics, and these fibers can be used as substrates such as books, wallpaper, and air filters.

1 is a process flow chart showing a method of manufacturing copper-zinc nanoparticles by hydrothermal synthesis according to the present invention

The present invention for achieving the above effects relates to a method for producing copper-zinc nanoparticles by hydrothermal synthesis, copper-zinc nanoparticles prepared by this method, and an antibacterial latex foam containing the same, the technical configuration of the present invention It should be noted that only the parts necessary for understanding are described, and the descriptions of the other parts will be omitted so as not to distract the gist of the present invention.

Hereinafter, a method of manufacturing copper-zinc nanoparticles by a hydrothermal synthesis method according to the present invention, copper-zinc nanoparticles prepared by this method, and an antibacterial latex foam containing the same will be described in detail as follows.

First, the method for producing copper-zinc nanoparticles by the hydrothermal synthesis method according to the present invention and the copper-zinc nanoparticles prepared by this method, as shown in FIG. 1, after dissolving the copper compound in the aqueous reaction medium, the zinc compound Doping (S100), and after the S100 step, a reducing agent having a hydroxyl group is dropped (dropping) to reduce and combine copper and zinc (S200), and the reaction is completed through the S200 step. It comprises a step of washing, filtering, drying and firing (S300).

The step S100 is a step of doping a zinc compound after dissolving a copper compound in an aqueous reaction medium. After dissolving 10 to 20 parts by weight of a copper compound with respect to 100 parts by weight of an aqueous reaction medium heated to 75 to 100 ° C, the zinc compound Doped 0.1 to 5.8 parts by weight. Here, when the reaction conditions and the content of each material are outside the above range, there is a fear that the doping reaction is not properly performed.

Meanwhile, water may be used as the aqueous reaction medium, and may include an organic solvent (eg, methanol, ethanol, etc.).

And the copper compound is a water-soluble copper compound, for example, a water-soluble copper-salt, a water-soluble copper-oxide salt, or a combination thereof may be used. For a more specific example, as the water-soluble copper-compound, CuCl ₂ , CuNO ₃ , CuSO ₄ , (CH ₃ COO) 2Cu or a combination thereof may be used, but is not limited thereto, and various copper compounds already known It is applicable.

In addition, the zinc compound is a water-soluble zinc compound, for example, water-soluble zinc-salt, water-soluble zinc-oxide salt, or a combination thereof may be used. For a more specific example, as the water-soluble zinc-compound, ZnCl ₂ , Zn (CH ₃ COO) * 2H ₂ 0, ZnBr ₂ or a combination thereof may be used, but is not limited thereto and various known zinc compounds It is applicable.

The step S200 is a step of reducing and bonding copper and zinc by dropping a reducing agent having a hydroxyl group after the step S100, and drawing 100 to 200 parts by weight of a reducing agent having a hydroxyl group while maintaining the rpm of the reactor at 350 to 500 Ping. Here, when the reaction conditions and the content of the reducing agent having a hydroxyl group are out of the above range, there is a fear that copper and zinc may not be reduced or combined properly.

Meanwhile, the hydroxyl group refers to a -OH group attached to the molecule. For example, water, methanol, ethanol, glycerin, butylene glycol, glucose, sodium hydroxide may be included. In addition, the reducing agent having a hydroxyl group may use water, methanol, ethanol, glycerin, butylene glycol, glucose, sodium hydroxide, and the like.

The S300 step is a step of washing, filtering, drying, and calcining the reactant that has undergone the reaction through the S200 step, and the reaction is completed through the S200 step (based on 100 parts by weight of the aqueous reaction medium of copper-zinc nanoparticles) The weight is about 8 to 10 parts by weight) washed and filtered using ethanol, dried at 85 to 95 ° C for 1 to 3 hours, and then gas atmosphere of 100 to 300 ° C (hydrogen mixed gas, argon gas, nitrogen gas, etc.) ) 1 ~ 3 hours firing on (heating rate is 100 ℃ / h, cooling rate is 100 ℃, cooled to room temperature (20 ℃)). Here, if the conditions for each process are outside the above range, there is a fear that firing may not be properly performed.

That is, the copper-zinc nanoparticles produced by the hydrothermal synthesis method using the reducing agent having a hydroxyl group according to the present invention is a reaction mixture in which a zinc compound is doped with a hydroxyl group and a water-soluble copper compound on an aqueous reaction medium, wherein the hydroxyl group is a reducing agent. And the water-soluble copper compound or zinc compound acts as a copper source or a zinc source. Therefore, the water-soluble copper compound or zinc compound is reduced by a hydroxyl group to be converted into copper-zinc nanoparticles. In addition, the size of the copper-zinc nanoparticles produced by the above manufacturing process is preferably 200 nm or less, but is not limited thereto.

Next, the antimicrobial latex foam according to the present invention is a latex foam having antibacterial properties by containing the copper-zinc nanoparticles prepared as above, and the method of foaming and curing together after adding the copper-zinc nanoparticles to the latex, There is a method of preparing an antibacterial latex foam by preparing a colloidal solution using the copper-zinc nanoparticles and contacting (lapping or spraying) the latex foam therewith.

As an example, a method of foaming and curing together after adding copper-zinc nanoparticles to latex is achieved by adding 2 to 10 parts by weight of copper-zinc nanoparticles, and then foaming and curing together. . Here, when the content of the copper-zinc nanoparticles is less than 2 parts by weight, there is a fear that the antimicrobial properties are insufficient, and when it exceeds 10 parts by weight, there is a risk of deteriorating the properties of the latex foam.

Here, latex (latex) is a rubber latex, natural rubber latex, synthetic rubber latex, or a combination thereof, but is not limited thereto, and various known latexes can be used. In addition, additives such as sulfur, a vulcanization accelerator, an antioxidant, a curing agent, a foam stabilizer, a filler, or a combination thereof, which are already known as other additives for manufacturing a foam, may be used, but this is not limited thereto, and is already known Various additives can be applied. In addition, foaming and curing may also be performed by various methods known in the art (for example, the Talay method, Dunlop method, or microvent method).

As another embodiment, a method for preparing a colloidal solution using the copper-zinc nanoparticles and contacting the latex foam to the dispersion medium is first prepared by mixing 1 to 10 parts by weight of a dispersant with respect to 100 parts by weight of the dispersion solvent, and A copper-zinc nanoparticle colloidal solution is prepared by mixing 2 to 20 parts by weight of copper-zinc nanoparticles with respect to 100 parts by weight of the dispersion medium.

Here, water, ethanol, methanol, or a combination thereof may be used as the dispersing solvent, and a solubilizing agent such as polysorbate, olive oil page-7 ester, and polyvinyl alcohol may be used as the dispersing agent.

Then, the latex foam is immersed in the prepared copper-zinc nanoparticle colloidal solution for 30 to 35 minutes, or the copper-zinc nanoparticle colloidal solution is sprayed onto the latex foam, and then dried at 40 to 45 ° C for 9 to 10 hours. Is done. Here, if the composition (material and content) of the colloidal solution or the immersion and drying conditions of the latex foam is out of the above range, there is a fear that the antimicrobial properties are insufficient.

Meanwhile, the amount of the copper-zinc nanoparticle colloidal solution is not particularly limited during the immersion or dispersion, and may be an amount sufficient to be applied and supported on the outer surface and the inner pore surface of the latex foam.

In addition, the immersion process can be made in various forms. For example, the immersion process may be performed by immersing the latex foam in a copper-zinc nanoparticle colloidal solution contained in a container. Preferably, the copper-zinc nanoparticle colloidal solution may be subjected to mechanical vibration to the copper-zinc nanoparticle colloidal solution or latex foam during the immersion process in order to promote even penetration into the inner pores of the latex foam. More preferably, the adhesion of the copper-zinc nanoparticle colloid to the latex surface may be increased through ultrasonic vibrators and heating. Heating of the immersion aqueous solution is performed within a range in which physical damage of the latex foam is not applied, and it is preferable that the normal heating temperature does not exceed 70 ° C.

In addition, the antibacterial latex foam prepared as described above may be subjected to a washing process, a dehydration process, and a drying process as a typical post-treatment step. The dehydration and drying process can be dehydrated using a commonly used dehydration device. Preferably, the latex foam carrying the copper-zinc nanoparticle colloidal solution without using a dehydrating device can be naturally dried, or dried at a temperature of 70 ° C. or lower in an oven or the like.

That is, as the antibacterial latex foam according to the present invention contains copper-zinc nanoparticles in itself, or the copper-zinc nanoparticle colloidal solution is densely and uniformly dispersed on the surfaces of the outer and inner pores of the antibacterial latex foam. Very strong antibacterial performance.

Hereinafter, the contents of the present invention will be described in detail through the following examples, and the present invention is not necessarily limited to the following examples.

1. Preparation of copper-zinc nanoparticles by hydrothermal synthesis

(Production Example 1)

100 g of water is heated to 75 ° C. Then, 10 g of CuSO ₄ was added and sufficiently dissolved, and then 0.1 g of ZnCl ₂ was doped. Then, by dropping 100 g of sodium hydroxide, copper and zinc are reduced and combined. During the reaction, the reactor rpm is maintained at about 350. After the reaction is completed, it is washed and filtered several times, but it is washed several times using ethanol when filtering. Then, it was dried at 90 ° C for 2 hours. The dried precursor was fired at an firing temperature of 100 ° C. for 2 hours (argon gas atmosphere) to prepare copper-zinc nanoparticles.

(Production Example 2)

100 g of water is heated to 100 ° C. Then, 20 g of CuSO ₄ was added and sufficiently dissolved, and then 5.8 g of ZnCl ₂ was doped. Then, 200 g of sodium hydroxide is dropped and copper and zinc are reduced to combine. During the reaction, the reactor rpm is maintained at about 500. After the reaction is completed, it is washed and filtered several times, but it is washed several times using ethanol when filtering. Then, it was dried at 90 ° C for 2 hours. The dried precursor was fired at an firing temperature of 300 ° C. for 2 hours (argon gas atmosphere) to prepare copper-zinc nanoparticles.

(Production Example 3)

100 g of water is heated to 75 ° C. Then, 10 g of CuCl ₂ was added and sufficiently dissolved, and then 0.1 g of ZnBr ₂ was doped. Then, 100 g of glycerin is dropped to reduce copper and zinc to combine. During the reaction, the reactor rpm is maintained at about 350. After the reaction is completed, it is washed and filtered several times, but it is washed several times using ethanol when filtering. Then, it was dried at 85 ° C for 3 hours. The dried precursor was fired at a firing temperature of 100 ° C. for 3 hours (argon gas atmosphere) to prepare copper-zinc nanoparticles.

(Production Example 4)

100 g of water is heated to 75 ° C. Then, 20 g of CuCl ₂ was added and sufficiently dissolved, and then 5.8 g of ZnBr ₂ was doped. Then, 200 g of glycerin is dropped to reduce copper and zinc to combine. During the reaction, the reactor rpm is maintained at about 500. After the reaction is completed, it is washed and filtered several times, but it is washed several times using ethanol when filtering. Then, it was dried at 95 ° C for 1 hour. The dried precursor was fired at a firing temperature of 300 ° C. for 1 hour (nitrogen gas atmosphere) to prepare copper-zinc nanoparticles.

2. Preparation of colloidal solution of copper-zinc nanoparticles

(Production Example 5)

A dispersion medium was prepared by adding 1 g of polysorbate to 100 g of water and about 85 ° C. and dissolving it sufficiently and cooling. Then, 20 g of the copper-zinc nanoparticle powder prepared in Preparation Example 2 was added to the dispersion medium, and stirred sufficiently to prepare a colloidal solution.

(Production Example 6)

Dispersing medium was prepared by adding 10 g of polyvinyl alcohol to 100 g of water and about 85 ° C., sufficiently dissolving and cooling. Then, 2 g of the copper-zinc nanoparticle powder prepared in Preparation Example 2 was added to 100 g of the dispersion medium, and sufficiently stirred to prepare a colloidal solution.

3. Preparation of antibacterial latex foam

(Example 1)

With respect to 100 parts by weight of natural rubber latex, 2 parts by weight of copper-zinc nanoparticles according to Preparation Example 1 and conventional additives (1.0 parts by weight of sulfur, zinc diethyl dithiocarbarmate (EZ) 0.1 parts by weight, antioxidant (SP (Styrenated Phenol)) 0.5 parts by weight, 0.5 parts by weight of curing agent (SSF (Sodium Silicofluoride)), 0.5 parts by weight of bubble stabilizer (DPG (Cyclohexamine Diphenylguanidine)) and 5 parts by weight of filler (Clay) are mixed and foamed to prepare an antibacterial latex foam. Did.

(Example 2)

With respect to 100 parts by weight of natural rubber latex, 2 parts by weight of copper-zinc nanoparticles according to Preparation Example 3 and conventional additives (1.0 parts by weight of sulfur, zinc diethyl dithiocarbarmate (EZ) 0.1 parts by weight, antioxidant (SP (Styrenated Phenol)) 0.5 parts by weight, 0.5 parts by weight of curing agent (SSF (Sodium Silicofluoride)), 0.5 parts by weight of bubble stabilizer (DPG (Cyclohexamine Diphenylguanidine)) and 5 parts by weight of filler (Clay) are mixed and foamed to prepare an antibacterial latex foam. Did.

(Example 3)

With respect to 100 parts by weight of natural rubber latex, 10 parts by weight of copper-zinc nanoparticles according to Preparation Example 1 and 0.1 parts by weight of conventional additives (1.0 parts by weight of sulfur, zinc diethyl dithiocarbarmate (EZ), antioxidant (SP (Styrenated Phenol)) 0.5 parts by weight, 0.5 parts by weight of curing agent (SSF (Sodium Silicofluoride)), 0.5 parts by weight of bubble stabilizer (DPG (Cyclohexamine Diphenylguanidine)) and 5 parts by weight of filler (Clay) are mixed and foamed to prepare an antibacterial latex foam. Did.

(Example 4)

With respect to 100 parts by weight of natural rubber latex, 10 parts by weight of copper-zinc nanoparticles according to Preparation Example 3 and conventional additives (1.0 parts by weight of sulfur, zinc diethyl dithiocarbarmate (EZ) 0.1 parts by weight, antioxidant (SP (Styrenated Phenol)) 0.5 parts by weight, 0.5 parts by weight of curing agent (SSF (Sodium Silicofluoride)), 0.5 parts by weight of bubble stabilizer (DPG) and 5 parts by weight of filler (Clay) are mixed and foamed to prepare an antibacterial latex foam. Did.

(Example 5)

The copper-zinc nanoparticle colloidal solution according to Preparation Example 5 was stirred at room temperature (20 ° C), the latex foam was soaked in the solution for about 30 minutes and then taken out and dried at 40 ° C for 10 hours to prepare an antibacterial latex foam. .

(Example 6)

The copper-zinc nanoparticle colloidal solution according to Preparation Example 6 was stirred at room temperature (20 ° C.), sprayed on the latex, and dried in a dryer at 45 ° C. for 9 hours to produce an antibacterial latex foam.

(Comparative Example 1)

Prepared in the same manner as in Example 1, but did not add copper-zinc nanoparticles.

4. Evaluation of antibacterial latex foam

For the antimicrobial latex foams according to Examples 1 to 6 and Comparative Example 1, antibacterial performance was measured by a CFU count (Colony Forming Unit Count) method, and the specimen was tested by cutting the antimicrobial latex foam to a width of 1 cm * length of 1 cm. . Three types of E. coli, Staphylococcus aureus and Pseudomonas aeruginosa were used.

More specifically, E. coli, Staphylococcus aureus, and Pseudomonas aeruginosa are inoculated 100 μl in 3 mL LB liquid medium and cultured for at least 12 hours. The cultured three strains were inoculated with 500 μl of fresh 10 mL LB liquid medium and cultured until OD600 0.8. 100 μl of the culture solution with the OD value and 4.9 mL of PBS are mixed. 50 µl of the diluted culture medium was sprinkled on the latex foam and reacted at 37 ° C. for 4 hours. After the reaction for 4 hours, 1 mL of PBS is sprayed on the latex foam to wash out the bacteria on the paper. After taking 1 mL of PBS sprayed on latex foam, dilute 10 times and streak on LB solid medium (smear method).

Table 1 below shows the actual number of bacteria (CFU / mL) among the antibacterial test results for the antibacterial latex foam.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Initial number of bacteria E. coli experiment 8.28 × 10 ⁷ 8.46 × 10 ⁷ 5.52 × 10 ⁷ 4.14 × 10 ⁷ 1.01 × 10 ⁷ 5.7 × 10 ⁷ 7.66 × 10 ⁸ 9.2 × 10 ⁸
Staphylococcus aureus experiment 7.5 × 10 ⁷ 8.25 × 10 ⁷ 3.9 × 10 ⁷ 4.13 × 10 ⁷ 7.5 × 10 ⁶ 4.05 × 10 ⁷ 6.3 × 10 ⁸ 7.5 × 10 ⁸
Pseudomonas aeruginosa experiment 3.6 × 10 ⁶ 4.0 × 10 ⁶ 2.0 × 10 ⁶ 1.6 × 10 ⁶ 4.0 × 10 ⁴ 1.88 × 10 ⁶ 3.3 × 10 ⁷ 4.0 × 10 ⁷

[Table 2] below shows the antibacterial activity against the antibacterial latex foam.

division E. coli antibacterial (%) Staphylococcus aureus
Antibacterial (%) Pseudomonas aeruginosa antibacterial (%) Example 1 91 90 91 Example 2 90.8 89 90 Example 3 94 94.8 95 Example 4 95.5 94.5 96 Example 5 98.9 99 99.9 Example 6 93.8 94.6 95.3 Comparative Example 1 16.7 15.8 17.2

As shown in [Table 1] and [Table 2], it can be seen that the antibacterial latex foam according to the present invention realizes excellent antibacterial properties by containing copper-zinc nanoparticles by hydrothermal synthesis using a reducing agent having a hydroxyl group. .

As described above, a method of manufacturing copper-zinc nanoparticles by hydrothermal synthesis according to the present invention, copper-zinc nanoparticles prepared by this method, and an antibacterial latex foam containing the same will be described through the above preferred embodiment and , It has been confirmed that the superiority, but those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention described in the following claims.

Claims (8)

In the method for producing copper-zinc nanoparticles by hydrothermal synthesis method,
After dissolving the copper compound in the aqueous reaction medium, doping the zinc compound (S100);
After the step S100, by dropping (reducing) a reducing agent having a hydroxyl group, reducing and bonding copper and zinc (S200); And
It characterized in that it comprises a; step (S300) of washing, filtering, drying and calcining the reacted product through the step S200, the method for producing copper-zinc nanoparticles by hydrothermal synthesis.
According to claim 1,
The S100 step,
Of copper-zinc nanoparticles by hydrothermal synthesis method, characterized in that 10 to 20 parts by weight of copper compound is dissolved, and then 0.1 to 5.8 parts by weight of zinc compound is doped with respect to 100 parts by weight of the aqueous reaction medium heated to 75 to 100 ° C. Manufacturing method.
According to claim 1,
The S200 step,
A method for producing copper-zinc nanoparticles by hydrothermal synthesis, characterized in that 100 to 200 parts by weight of a reducing agent having a hydroxyl group is dropped while the rpm of the reactor is maintained at 350 to 500.
According to claim 1,
The S300 step,
After the reaction is completed through the step S200, the reactant is washed and filtered using ethanol, dried at 85 to 95 ° C for 1 to 3 hours, and then calcined for 1 to 3 hours in a gas atmosphere at 100 to 300 ° C. , Method for producing copper-zinc nanoparticles by hydrothermal synthesis.
Copper-zinc nanoparticles produced by the production method according to claim 1.
In the antibacterial latex foam containing copper-zinc nanoparticles according to claim 5,
Antibacterial latex foam, characterized in that it comprises 2 to 10 parts by weight of copper-zinc nanoparticles relative to 100 parts by weight of latex.
In the antibacterial latex foam containing copper-zinc nanoparticles according to claim 5,
It is characterized by immersing the latex foam in the copper-zinc nanoparticle colloidal solution for 30 to 35 minutes, or spraying the copper-zinc nanoparticle colloidal solution into the latex foam and drying it at 40 to 45 ° C for 9 to 10 hours. Antibacterial latex foam.
The method of claim 7,
The copper-zinc nanoparticle colloidal solution,
Antibacterial latex foam, characterized in that the dispersion medium is prepared by mixing 1 to 10 parts by weight of dispersant with respect to 100 parts by weight of the dispersion solvent, and 2 to 20 parts by weight of copper-zinc nanoparticles with respect to 100 parts by weight of the dispersion medium. .

Images