JP2009045287A - Deodorizing antibacterial agent and manufacturing method of deodorizing antibacterial agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorizing antibacterial agent which shows little color, sufficiently suppresses color changes over time, and is excellent in deodorization and antibacterial performance. <P>SOLUTION: The deodorizing antibacterial agent includes nano-diamond aggregation materials where nano-diamonds are aggregated. The nano-diamond aggregation material is a deodorizing antibacterial agent whose metal content is 1 mass% or less. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a deodorizing antibacterial agent, a method for producing a deodorizing antibacterial agent, a deodorizing antibacterial method, a filter for deodorizing antibacterial, a deodorizing antibacterial device, and a deodorizing antibacterial agent spraying device.

Odorous substances present in the space adhere to clothing, carpets, etc. and cause odors. Also, bad odor in the toilet is regarded as a problem. Regarding such odor problems, silver has long been known to have deodorizing properties. In recent years, silver, zinc, aluminum, iron, nickel, tin, or lead has been used as a deodorant spray using a silver nanoparticle dispersion. A fragrance having a metal ion-based deodorizing effect has also been proposed (see Patent Documents 1 and 2).

However, silver nanoparticles exhibit a silver color when the particle diameter is large, and exhibit a yellow to green color due to plasmon absorption when the particle diameter is small (approximately 5 nm to 100 nm). For this reason, when it is applied to an object to be coated, the color adheres, or the deposited silver exhibits a black color through an oxidation-reduction reaction due to change over time. Further, when silver ions are used, the silver ions are reduced by sunlight or the like, and are precipitated as silver particles to exhibit a black color. Therefore, there was a problem that it was difficult to apply to the use which has design nature.

Activated carbon has also been known to have deodorizing properties for a long time, and is widely used as a material that exhibits relatively high deodorizing performance even at low concentrations against malodorous substances in the gas phase (Patent Document 3). reference). However, since activated carbon also exhibits a black color, it is difficult to apply to applications having design properties as well.

Furthermore, a colloidal dispersion containing silver particles and diamond fine particles and having antibacterial and deodorizing effects has been proposed (Patent Document 4). However, the metal content (impurity amount) in the diamond fine particles is not examined here. Moreover, since it contains a large amount of silver particles, there is the above-mentioned coloring problem. Furthermore, the deodorizing property is not fully satisfactory.
Further, not only deodorizing properties as described above but also antibacterial properties are required. Therefore, it has been desired to provide a deodorizing antibacterial agent that exhibits almost no color, does not change in color over time, and has excellent deodorizing properties and antibacterial properties.
JP-A-7-82111 Japanese Patent Laid-Open No. 2007-130083 JP-A-4-180834 JP 2007-138204 A

In view of the above-mentioned present situation, the present invention aims to provide a deodorant antibacterial agent that hardly exhibits color, is sufficiently suppressed in color change over time, and has excellent deodorant properties and antibacterial properties. It is.

The present invention relates to a deodorizing antibacterial agent comprising a nanodiamond aggregate in which nanodiamonds are aggregated, wherein the nanodiamond aggregate has a metal content of 1% by mass or less. .
The deodorizing antibacterial agent is preferably obtained by using a nanodiamond dispersion in which the nanodiagram aggregate is dispersed in a solvent.

In the deodorizing antibacterial agent, the nanodiamond aggregate is preferably synthesized by an explosion method.
In the deodorizing antibacterial agent, the blending amount of the nanodiamond aggregate is preferably 95% by mass or more in 100% by mass of the solid content of the deodorizing antibacterial agent.

The present invention is a method for producing the above-described deodorant antibacterial agent, comprising the steps of obtaining unwashed nanodiagram aggregates synthesized by an explosion method with a basic compound and an acidic compound to obtain washed nanodiagram aggregates. It is also a manufacturing method of the deodorizing antibacterial agent characterized by including.

The present invention is also a deodorizing and antibacterial method characterized by using the above-mentioned deodorizing antibacterial agent.
The deodorizing and antibacterial method is preferably a method for deodorizing and antibacterial by spraying a deodorizing antibacterial agent into a space.
The deodorizing and antibacterial method preferably deodorizes and antibacterials by spraying and adhering a deodorizing antibacterial agent to an object to be coated.
In the deodorizing and antibacterial method, the object to be coated is preferably a filter.

The present invention is also a filter for deodorizing and antibacterial, wherein the above-mentioned deodorizing antibacterial agent is attached.
The present invention is also a deodorizing and antibacterial device comprising the above-mentioned deodorizing and antibacterial filter.
The present invention is also a deodorizing antibacterial agent spraying device characterized in that the deodorizing antibacterial agent described above is housed in a container and a spraying device is attached to the opening.
Hereinafter, the present invention will be described in detail.

The deodorizing antibacterial agent of the present invention contains nanodiamond aggregates having a low metal content (metal impurity amount). In the present invention, such a nanodiagram aggregate having a low metal content is used, so that high deodorizing properties and antibacterial properties are exhibited. The reason for the high deodorant effect and antibacterial effect is not clear, but it is presumed that the nanodiagram aggregate having a small amount of impurities and having a specific structure exhibits an action of adsorbing malodorous components very well.

Since the present invention is a deodorizing antibacterial agent using the above-mentioned nanodiagram aggregate as an essential component, even if it is applied to an object to be coated with a spray or the like, it is hardly colored. Therefore, when the deodorant antibacterial agent of this invention is used, it can prevent impairing the design property of a to-be-coated object. The nanodiagram aggregate is a chemically stable compound and hardly changes over time. For this reason, when the deodorizing antibacterial agent of the present invention is applied to an object to be applied, there is almost no adverse effect on the object to be applied.

The deodorizing antibacterial agent of the present invention includes a nano diamond aggregate in which nano diamonds are aggregated. Here, the nano diamond is diamond fine particles having an average primary particle size of 3 to 10 nm. In the present specification, the average primary particle diameter of nanodiamonds (diamond fine particles) is measured by a transmission electron microscope.

The nanodiamond aggregate in the present invention is an aggregate of such nanodiamonds. It can be confirmed with a transmission electron microscope that it is an aggregate.
In the present invention, the aggregate diameter of the nanodiamond aggregate is preferably 15 to 80 nm (median diameter). In this case, high deodorant property and antibacterial property can be obtained. In the present specification, the aggregated particle diameter of the nanodiamond aggregate is measured by a dynamic light scattering particle diameter measuring apparatus, LB-550 manufactured by Horiba, Ltd.

The metal content (metal impurity amount) of the nanodiamond aggregate is 1% by mass or less. Deodorant property and antibacterial property can be improved by being an aggregate of nanodiamonds with a small amount of metal impurities such as Ag, Al, Fe, Mn, P, Si, Ti. In addition, when a large amount of metal impurities, particularly heavy metal impurities, is contained, there is a possibility of adversely affecting the living environment, the object to be coated, the sprayer or the deodorizing antibacterial device. The metal content is preferably 0.5% by mass or less, and more preferably 0.1% by mass or less.
In the present specification, the metal content is a value measured by ICP (SPS-4000 manufactured by Seiko Denshi Kogyo Co., Ltd.) after acid decomposition and alkali melting of a sample (nanodiagram aggregate).

The method for synthesizing diamond, which is a raw material for the nanodiamond aggregate, is not particularly limited, and examples thereof include known production methods such as an explosion method, a flux method, and a high temperature / high pressure method. Of these, the explosion method is preferred from the viewpoint of improving deodorant properties and antibacterial properties. The explosion method is a synthesis method in which ultrahigh pressure is generated by a shock wave generated by a method such as explosive explosives to convert particles having a graphite structure into particles having a diamond structure. Examples of the explosion method include methods described in JP-B No. 54-10558, JP-A No. 10-334457, and the like.

As described above, the nanodiagram aggregate in the present invention has a metal content of 1% by mass or less. As a preferable method for producing such a nanodiagram aggregate, the following method can be exemplified.

By performing a step of washing the unwashed nanodiamond aggregate with a basic compound and an acidic compound to obtain a washed nanodiameter aggregate, a nanodiamond aggregate having a metal content of 1% by mass or less can be produced. When the product obtained by this method is used, the amount of metal impurities can be reduced satisfactorily, and high deodorizing properties and antibacterial properties can be obtained.

The unwashed nanodiamond agglomerates can be used without particular limitation, such as those obtained by the above-described explosion method, flux method, high-temperature and high-pressure method, etc. Are preferred. Thereby, high deodorizing property and antibacterial property can be obtained.

The order of washing with the basic compound and the acidic compound is not particularly limited. Even if the washing with the acidic compound is performed after the washing with the basic compound, the washing with the acidic compound is performed after the washing with the acidic compound. A method of performing cleaning may be used.

If the said basic compound shows basicity, it will not specifically limit, A conventionally well-known thing can be used, For example, an inorganic alkali compound, an organic alkali compound, etc. are mentioned. Of these, inorganic alkali compounds are preferred.

Examples of the inorganic alkali compound include alkali metal hydroxides such as lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide; sodium carbonate, sodium phosphate, potassium phosphate, sodium pyrophosphate, potassium pyrophosphate. And sodium silicate such as potassium carbonate and sodium metasilicate, and potassium metasilicate.

Examples of the organic alkali compound include triethanolamine, diethanolamine, butylamine, phenylhydrazine, tetramethylammonium hydroxide, hydrazine, methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, ethanolamine, propylamine, and isopropylamine. , Dipropylamine, allylamine, aniline, polyalkylenepolyamine, 2-ethylhexylamine, cyclohexylamine, piperidine, formamide, N, N-methylformamide, urea and the like. Among the above basic compounds, alkali metal hydroxides are more preferable, and sodium hydroxide is particularly preferable. Thereby, deodorant property and antibacterial property can be improved. These basic compounds may be used alone or in combination of two or more.

Washing with the above basic compound can be performed by a conventionally known method. Among them, the nanodiagram aggregate (after washing or after washing with an acid compound) and an aqueous solution of the basic compound are mixed, stirred, and then decanted. It is preferable to use a method of removing the cleaning liquid (liquid component) by removing the supernatant with, for example. Thereby, the amount of metal impurities can be reduced satisfactorily, and deodorant and antibacterial properties can be improved.

Examples of the acidic compound include inorganic acids such as hydrochloric acid, nitric acid, sulfuric acid, nitrous acid, and sulfurous acid; formic acid, acetic acid, propionic acid, citric acid, tartaric acid, fumaric acid, succinic acid, oxalic acid, gluconic acid, lactic acid, levulinic acid, malic acid, glycolic acid, maleic acid, amidosulfonic acid (H 2 _NSO 3 _H), and toluenesulfonic acid, and organic acids such as p- methyl-toluenesulfonic acid. Among the acidic compounds, inorganic acids are preferable, and sulfuric acid and hydrochloric acid are more preferable. Thereby, the amount of metal impurities can be reduced satisfactorily, and deodorant and antibacterial properties can be improved. These acidic compounds may be used alone or in combination of two or more.
The washing with the acidic compound is particularly preferably carried out after washing with sulfuric acid and further with hydrochloric acid.

Washing with the acidic compound can be carried out by a conventionally known method. In particular, the nanodiagram aggregate (after washing or after washing with the basic compound) and the aqueous solution of the acidic compound are mixed and stirred, and then decantated. It is preferable to use a method of removing the cleaning liquid (liquid component) by removing the supernatant with, for example. Thereby, the amount of metal impurities can be reduced satisfactorily, and deodorant and antibacterial properties can be improved.
After washing with the basic compound and acidic compound, it is preferable to perform ultrafiltration, centrifugation, or the like as necessary.

The deodorant antibacterial agent of the present invention is preferably obtained using a nanodiamond dispersion liquid in which nanodiagram aggregates are dispersed in a solvent. By using such a dispersion, excellent deodorizing properties and antibacterial properties can be obtained.

The solvent is not particularly limited, and examples thereof include water, an organic solvent, a mixture of water and an organic solvent, and the like.
Examples of the organic solvent include hydrocarbons such as n-hexane, benzene, and toluene, halogenated hydrocarbons such as methylene chloride, carbon tetrachloride, 1,1,1-trichloroethane, Freon 141b, and fluorobenzene, ethanol, Alcohols such as methanol, n-propyl alcohol, isopropyl alcohol and sec-butanol, polyhydric alcohols such as ethylene glycol, ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate, silicon such as dimethyl silicone ethyl Oils etc. can be mentioned. Of these, water is preferred. Moreover, drying property can be improved by adding alcohol etc.

The method for preparing the nanodiamond dispersion is not particularly limited, and can be obtained by dispersing nanodiamond aggregates in a solvent by a conventionally known method. For example, it can be produced by mixing and stirring nanodiamond aggregates (metal content of 1% by mass or less) obtained by various methods and a solvent.

In the deodorizing antibacterial agent, the content (solid content) of the nanodiamond aggregate is preferably 0.01 ppm to 5% by mass, and more preferably 0.1 ppm to 1% by mass. If it is less than 0.01 ppm, sufficient deodorant and antibacterial properties may not be obtained. If it exceeds 5% by mass, the dispersibility of the nanodiamond aggregate may be lowered. Further, it is disadvantageous in terms of cost.

The blending amount (solid content) of the nanodiamond aggregate is preferably 95% by mass or more in 100% by mass of the solid content contained in the deodorant antibacterial agent of the present invention. If it is less than 95% by mass, there is a possibility that the deodorizing property and antibacterial property due to the nanodiamond aggregate cannot be obtained satisfactorily. More preferably, it is 98 mass% or more.

The deodorizing antibacterial agent of the present invention contains a solvent. As a solvent in a deodorizing antibacterial agent, the same thing as the said solvent can be used individually or in mixture of 2 or more types. Among these, water is preferable because it has little adverse effect on the object to be coated.

The deodorizing antibacterial agent may contain other deodorizing components. Examples of the other deodorant components include masking agents such as naphthalene, p-dichlorobenzene, o-chlorophenol, camphor, camphor oil, lemon oil; cumene hydroperoxide, acetal peroxide, β-ethoxypropionaldehyde, glutaraldehyde And other chemical deodorants.

In the deodorizing antibacterial agent of the present invention, a surfactant may be added in order to prevent clogging of the nozzle of the sprayer and aggregation of the nanodiamond.
Examples of the surfactant include ionic sodium dodecyl sulfate (manufactured by Wako Pure Chemical Industries, Ltd.), Demol ST (manufactured by Kao Corporation), Esocard C25 (Lion Akzo), nonionic demol N (manufactured by Kao Corporation). ), Floren WK20 (manufactured by Kyoeisha Chemical Co., Ltd.), disperbyk-193 (manufactured by Big Chemie Japan).

In addition, a binder component can be added to the deodorizing antibacterial agent in order to improve the adhesion to the object to be coated.
Examples of the binder include polyvinylpyrrolidone (manufactured by Wako Pure Chemical Industries, Ltd.), Poval PVA117 (manufactured by Kuraray Co., Ltd.), HEC-SP900 (manufactured by Daicel Chemical Industries, Ltd.) and the like.

The pH of the deodorant antibacterial agent of the present invention is preferably in the range of 5 to 9 in consideration of the influence on the container, the object to be coated, and the living environment.

The method for producing the deodorant antibacterial agent is not particularly limited, and a conventionally known method can be used. However, the washed nanodiagram aggregate is washed with a basic compound and an acidic compound. The manufacturing method including the process of obtaining a thing is preferable. By this production method, nanodiamond aggregates (washed) having a low metal content can be obtained, and therefore, it is possible to produce a deodorizing and antibacterial agent having excellent deodorizing properties and antibacterial properties. The obtained deodorant antibacterial agent exhibits almost no color and hardly changes in color over time.

The said process can be performed similarly to the process described by manufacture of the nano diamond aggregate whose metal content is 1 mass% or less mentioned above. The unwashed nanodiamond aggregate used in the above step is preferably synthesized by an explosion method. After the above steps, the nanodiagram aggregate (metal content 1% by mass or less) obtained by various methods and a solvent are mixed and stirred, and the nanodiagram aggregate is dispersed in the solvent by a conventionally known method. The deodorizing antibacterial agent of the present invention can be produced.
In the production of the deodorant antibacterial agent, when the nanodiamond dispersion obtained by the above-described production method is used, the obtained nanodiamond dispersion may be used as it is as the deodorant antibacterial agent.

Since the deodorant antibacterial agent obtained above has an excellent deodorizing action, sweat odor (ammonia, acetic acid, iso-yoshinamic acid, etc.), aging odor (ammonia, acetic acid, iso-yoshinamic acid, nonenal, etc.) ), Excretion odor (ammonia, acetic acid, methyl mercaptan, hydrogen sulfide, indole, etc.), tobacco odor (ammonia, acetic acid, acetaldehyde, pyridine, hydrogen sulfide, etc.), garbage odor (ammonia, acetic acid, methyl mercaptan, trimethylamine, hydrogen sulfide) Etc.) and so on. It also has an excellent antibacterial action.

By using the above deodorizing antibacterial agent, the deodorizing effect and the antibacterial effect can be satisfactorily obtained by a method of spraying in a space, a method of spraying and adhering to an object to be coated, and the like. Further, when a deodorizing antibacterial agent is applied (sprayed) to a filter (object to be coated), the filter can be used as a deodorizing antibacterial filter.

Further, a deodorizing and antibacterial device using such a filter for deodorizing and antibacterial can also exhibit a good deodorizing effect and antibacterial effect. Furthermore, a deodorizing antibacterial agent spraying device in which the above deodorizing antibacterial agent is housed in a container and a spraying device is attached to the opening can also provide a good deodorizing effect and antibacterial effect.

As the deodorizing antibacterial agent spraying device, a device in which the deodorizing antibacterial agent is housed in a known spray container is preferable. Since the nanodiamond aggregate is easily dispersed in a liquid, it can be easily used by coating with a spray. The spray container is composed of a sprayer part capable of spraying deodorant antibacterial agent (liquid) onto fine particles and a container part filled with the deodorant antibacterial agent (liquid). A well-known thing can be used.

As the spray part of the spray container, a trigger type is preferable, and for example, a pressure accumulation type trigger described in Japanese Utility Model Laid-Open No. 4-37554 can be suitably used. The capacity of the container portion may be appropriately set according to the intended use, form purpose, and the like, but it is usually preferable to have a capacity that can be held with one hand.

Since the deodorizing antibacterial agent of the present invention has little adverse effect on the object to be coated, when a smell is felt or when the occurrence of the smell is predicted, a stuffed animal, cushion, wall, pillar, car dashboard, clothes, toilet bowl By spraying and applying quickly, etc., the deodorizing property can be expressed easily. It can also be sprayed onto carpets and figurines to obtain a deodorizing effect. Furthermore, antibacterial properties can also be expressed.

Since the deodorizing antibacterial agent of the present invention contains nanodiamond aggregates having a low metal content (metal impurity amount), an excellent deodorizing effect and antibacterial effect can be obtained. Further, since nanodiamond aggregates are used, almost no color is exhibited and there is almost no change in color over time. Specifically, the color problem described in the above-mentioned patent document and the chemical change accompanied by the color change over time occur (in silver particle-based deodorants, silver undergoes an oxidation-reduction reaction in an aqueous solution, and the color changes. In contrast, a metal ion deodorant such as silver ion is colored by an oxidation-reduction reaction or does not exhibit a deodorizing effect). Such a problem does not occur because the product is chemically stable. Therefore, it can be suitably used for applications having design properties. Diamond also has the advantage of being chemically stable and harmless.

EXAMPLES Hereinafter, although an Example is hung up and demonstrated in more detail, this invention is not limited only to these Examples. In the examples, “parts” and “%” mean “parts by mass” and “% by mass” unless otherwise specified.

Example 1 Synthesis of deodorant antibacterial agent (nanodiamond dispersion) Nanodiamond having an average primary particle size of 3-10 nm synthesized by an explosion method was added to a 4N sodium hydroxide aqueous solution so as to be 15% by mass, After stirring at room temperature for 24 hours, the supernatant was removed by decantation, and the precipitate was washed with ion-exchanged water. Next, the recovered nanodiamond was added to concentrated sulfuric acid so as to be 15% by mass and stirred at room temperature for 24 hours, and then the supernatant was removed by decantation, and the precipitate was washed with ion-exchanged water. Next, the collected nanodiamond was added to 35% by mass hydrochloric acid so as to be 15% by mass, stirred at room temperature for 24 hours, the supernatant was removed by decantation, and the precipitate was washed with ion-exchanged water. Next, the collected nanodiamond is adjusted to 0.8% by mass with ion-exchanged water, ultrafiltered until the filtrate has an electric conductivity of 10 μS / cm, further concentrated to 5% by mass, and then dispersed by a bead mill. And coarse particles were settled by centrifugation to obtain nanodiagram aggregates.
Subsequently, the deodorizing antibacterial agent (nanodiamond dispersion liquid) was obtained by adjusting the obtained nanodiagram aggregate to 0.5 mass% with ion-exchange water.

In addition, the average primary particle diameter of the nano diamond synthesized by the explosion method was measured using a transmission electron microscope.
Moreover, when the obtained nano diamond aggregate was analyzed with the dynamic light-scattering particle size measuring apparatus and LB-550 by Horiba Ltd., the aggregate particle diameter was 20-50 nm.
Further, when this nanodiamond aggregate was analyzed with a transmission electron microscope, it was a nanodiamond aggregate.
Furthermore, the metal content (metal impurity amount) of the nanodiamond aggregate was measured by ICP (SPS-4000 manufactured by Seiko Denshi Kogyo Co., Ltd.) after acid decomposition and alkali melting of the sample. The metal content is shown in Table 1, and the amount of each metal is shown in Table 2.

(Application method)
Apply the deodorant antibacterial agent (nanodiamond dispersion) prepared above to a 10cm square cotton cloth by spraying, dry it with a dryer at 150 ° C for 5 minutes to remove moisture, and make a nanodiamond adhesion rate of 1% by mass. I got a cloth. The adhesion rate was determined from the mass before and after the treatment.

Example 2
A deodorizing antibacterial agent (nanodia dispersion) was obtained in the same manner as in Example 1 except that the obtained nanodiagram aggregate was adjusted to 0.06% by mass with ion-exchanged water.
Further, a cotton fabric was obtained in the same manner as in Example 1 except that the nano diamond adhesion rate was 0.02% by mass.

Comparative Example 1
A silver colloid aqueous solution prepared by a chemical reduction method was adjusted to 1.0 mass% with ion-exchanged water to obtain a deodorizing antibacterial agent (silver dispersion).
A cotton fabric was obtained in the same manner as in Example 1 except that the silver adhesion rate was 1% by mass.

Comparative Example 2
A deodorizing antibacterial agent (silver dispersion) was obtained in the same manner as in Comparative Example 1 except that the silver colloid aqueous solution was adjusted to 0.02% by mass.
Further, a cotton fabric was obtained in the same manner as in Comparative Example 1 except that the silver adhesion rate was 0.02% by mass.

Comparative Example 3
The nano diamond synthesized by the explosion method used in Example 1 was washed three times with ion-exchanged water, and then adjusted to 0.5% by mass to obtain a deodorizing antibacterial agent. In addition, the metal content (metal impurity amount) of the nano diamond aggregate was 1.1% by mass.
Using the obtained deodorant antibacterial agent, a cotton fabric was prepared in the same manner as in Example 1 with an adhesion rate of 1% by mass.

Comparative Example 4
A deodorizing antibacterial agent prepared by mixing the nanodiamond synthesized by the explosion method used in Example 1 and the silver colloid used in Comparative Example 1 so as to have a mass ratio of 1/1 to a total mass of 0.5% by mass. Got.
Using the obtained deodorant antibacterial agent, a cotton fabric was prepared in the same manner as in Example 1 with an adhesion rate of 1% by mass.

[Evaluation]
(Discoloration of cotton cloth)
During the production of the cotton cloth, the color of the cotton cloth after the attachment was observed with the naked eye, and the results are shown in Table 1.
Moreover, the external appearance photograph of each cotton cloth was shown in FIG.
(Deodorization test)
Put a sample (cotton cloth) in a 5 L plastic container, inject 3 L of a predetermined concentration of gas, measure the gas concentration after 2 hours by the detector tube method, determine the reduction rate of the gas concentration, and show the results in Table 1. It was. As the gas, ammonia (initial concentration 40 ppm) and acetic acid (initial concentration 100 ppm) were used.
(Antimicrobial test)
The antibacterial test was performed based on JIS L1902. The results are shown in Table 1.

From Table 1, the cotton fabric (Example 1) having a nanodiamond adhesion rate of 1% by mass was superior in deodorizing properties compared to the cotton fabric having a silver adhesion rate of 1% by mass (Comparative Example 1). The same tendency was observed even when the adhesion rate was 0.02% by mass (Example 2, Comparative Example 2). In the cotton cloth (Comparative Example 3) having a metal content of 1% by mass or more, the deodorizing property was inferior to the Examples. The cotton fabric (adhesion rate 1 mass%, Comparative Example 4) using a mixed dispersion of silver and diamond (explosion method) was inferior in deodorization compared to Example 1. In addition, the deodorizers of the examples had almost no color change, but in the comparative examples, the color change was remarkable. Furthermore, the antimicrobial property which was excellent in both the Example and the comparative example was shown.

Moreover, when the deodorizing antibacterial agent (nanodiamond dispersion) produced in the examples was sprayed into the space by spraying, good deodorizing properties and antibacterial properties were obtained.
Furthermore, the filter made by spraying the deodorizing antibacterial agent (nanodiamond dispersion) produced in the examples shows excellent deodorizing properties and antibacterial properties, and the deodorizing antibacterial device equipped with this filter is preferably used. Was possible.

The deodorant antibacterial agent of the present invention can be suitably used for stuffed animals, cushions, walls, pillars, car dashboards, clothes, carpets, figurines, toilets and the like.

It is the figure which showed the external appearance photograph of the cotton cloth obtained by the Example and the comparative example.

Claims (12)

A deodorizing antibacterial agent comprising nanodiamond aggregates in which nanodiamonds are aggregated,
The nanodiagram aggregate has a metal content of 1% by mass or less, and a deodorizing antibacterial agent. The deodorizing antibacterial agent according to claim 1 obtained by using a nanodiamond dispersion liquid in which nanodiagram aggregates are dispersed in a solvent. The deodorizing antibacterial agent according to claim 1 or 2, wherein the nanodiagram aggregate is synthesized by an explosion method. The deodorizing antibacterial agent according to claim 1, 2 or 3, wherein the compounding amount of the nanodiamond aggregate is 95% by mass or more in a solid content of 100% by mass of the deodorizing antibacterial agent. A method for producing a deodorant antibacterial agent according to claim 1, 2, 3, or 4,
A method for producing a deodorant antibacterial agent, comprising a step of washing a non-washed nanodiagram aggregate synthesized by an explosion method with a basic compound and an acidic compound to obtain a washed nanodiagram aggregate. A deodorizing and antibacterial method using the deodorizing antibacterial agent according to claim 1. The deodorizing and antibacterial method according to claim 6, wherein the deodorizing and antibacterial agent is sprayed on the space to deodorize and antibacterial. The deodorizing and antibacterial method according to claim 6, wherein the deodorizing and antibacterial agent is sprayed on and adhered to an object to be deodorized and antibacterial. The deodorizing and antibacterial method according to claim 8, wherein the object to be coated is a filter. A deodorizing and antibacterial filter, wherein the deodorizing antibacterial agent according to claim 1 is attached. A deodorizing and antibacterial device comprising the deodorizing and antibacterial filter according to claim 10. 5. A deodorizing and antibacterial agent spraying device, wherein the deodorizing and antibacterial agent according to claim 1 is stored in a container and a spraying device is attached to the opening.