CN112591791B - Preparation of nano-micro-particle and application of sterilization, odor removal and aldehyde removal composition thereof - Google Patents
Preparation of nano-micro-particle and application of sterilization, odor removal and aldehyde removal composition thereof Download PDFInfo
- Publication number
- CN112591791B CN112591791B CN202011483764.2A CN202011483764A CN112591791B CN 112591791 B CN112591791 B CN 112591791B CN 202011483764 A CN202011483764 A CN 202011483764A CN 112591791 B CN112591791 B CN 112591791B
- Authority
- CN
- China
- Prior art keywords
- nano
- water
- mixed solution
- ethanol
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
The invention relates to the technical field of preparation and application of nano-particles, in particular to preparation of nano-particles and application of a composition for sterilizing, deodorizing and removing aldehyde. The preparation method of the nano-micro-particle comprises the following steps: (1) Mixing titanium isopropoxide and a polymer chelating agent solution, and performing ultrasonic treatment to obtain a mixed solution A; (2) And placing the mixed solution A, the ethanol-water mixed solution and the additive into an intermittent supercritical fluid treatment device for reaction to obtain nano-particles. The nano-particles have good dispersibility in water, particularly in nano-SOD water, and are liquid nano-particles with high concentration and stability; the nano-particle composition for sterilizing, deodorizing and removing aldehyde provided by the invention has the functions of air purification, water purification, antibiosis, disinfection and self-cleaning.
Description
Technical Field
The invention relates to the technical field of preparation and application of nano-particles, in particular to preparation of nano-particles and application of a sterilizing, deodorizing and aldehyde-removing composition thereof.
Background
Since the nano-particles are relatively fine, especially the nano-titanium dioxide particles, the nano-particles are in the technical fields of catalysts, ultraviolet resistance, adsorbents and the like. The traditional preparation method of nano titanium dioxide particles comprises a gel-sol method, a titanium tetrachloride gas phase oxidation method, a titanium alkoxide gas phase hydrolysis method and a solid phase method. However, the nano titanium dioxide particles prepared by the methods have few remarkable functionalities, and on the one hand, the nano titanium dioxide particles are easy to agglomerate and have poor dispersibility in water.
Disclosure of Invention
In order to solve the above technical problems, a first aspect of the present invention provides a method for preparing nanoparticles, the method comprising:
(1) Mixing titanium isopropoxide and a polymer chelating agent solution, and performing ultrasonic treatment to obtain a mixed solution A;
(2) And placing the mixed solution A, the ethanol-water mixed solution and the additive into an intermittent supercritical fluid treatment device for reaction to obtain the nano-micro particles.
As a preferred technical solution of the present invention, the volume ratio of the titanium isopropoxide to the polymer chelating agent solution in the step (1) is 1: (3-4).
In a preferred embodiment of the present invention, the volume ratio of the mixed solution a to the ethanol-water mixed solution in the step (2) is 1:1; the weight of the additive is 25-30% of that of the titanium isopropoxide.
As a preferred technical scheme of the invention, the polymer chelating agent solution consists of ethanol and a polymer chelating agent.
As a preferable technical scheme of the invention, the polymer chelating agent is one of water-based alkyd resin, water-based acrylic resin, water-based epoxy resin and water-based polyurethane.
As a preferable technical scheme of the invention, the volume ratio of ethanol to water in the ethanol-water mixed solution is (3-5): 1.
in a preferred embodiment of the present invention, the additive is an acidic additive.
As a preferred technical solution of the present invention, the acidic additive is at least one of acetic acid, formic acid, phthalic acid, benzoic acid, terephthalic acid, and benzoic acid.
In a second aspect, the invention provides a nano-particle sterilizing, odor-removing and aldehyde-removing composition, which comprises the nano-particles prepared by any one of the methods.
The third aspect of the invention provides the application of the nano-particle sterilizing, odor-removing and aldehyde-removing composition, wherein the application of the nano-particle sterilizing, odor-removing and aldehyde-removing composition comprises the treatment of beriberi, odor removal and formaldehyde removal.
The invention has the following beneficial effects:
1. the nano-particles have good dispersibility and stability in water;
2. the sterilizing, deodorizing and aldehyde-removing composition of nano-micro particles has the functions of air purification, water purification, antibiosis, disinfection and self-cleaning;
3. the nano-micro-particle of the invention is a liquid nano-micro-particle, and has higher concentration and stability;
4. the invention increases the dispersibility of the nano-particles in water through the additive;
5. the invention increases the dispersibility of the nano-particles in water by adding the polymer chelating agent.
Detailed Description
The first aspect of the present invention provides a method for preparing nanoparticles, comprising the steps of:
(1) Mixing titanium isopropoxide and a polymer chelating agent solution, and performing ultrasonic treatment to obtain a mixed solution A;
(2) And placing the mixed solution A, the ethanol-water mixed solution and the additive into an intermittent supercritical fluid treatment device for reaction to obtain nano-particles.
In one embodiment, the volume ratio of titanium isopropoxide to the solution of the polymeric chelant in step (1) is 1: (3-4).
In one embodiment, the volume ratio of the mixed solution a to the ethanol-water mixed solution in the step (2) is 1:1; the weight of the additive is 25-30% of that of the titanium isopropoxide.
In one embodiment, the ultrasonic treatment temperature in the step (1) is less than 60 ℃ and the ultrasonic treatment time is 40-50min.
The ultrasonic treatment in the step (1) enables titanium isopropoxide to be dispersed in the polymer chelating agent solution, so that the subsequent reaction is more favorably carried out, and the nano-particles in the step (2) are favorably formed to be stable.
In one embodiment, the reaction temperature in step (2) is greater than 245 ℃ and the reaction pressure is greater than 6.3MPa.
The critical temperature of the ethanol is 243 ℃, the critical pressure is 6.3MPa, and in the invention, the ethanol is reacted in a supercritical state, so that the time for preparing the nano-particles is reduced, and the stability and the dispersibility of the prepared nano-particles are improved.
In one embodiment, the nanoparticles obtained in step (2) are subjected to a heat treatment at 200-220 ℃ after removing water, vacuum distillation and organic solvent, to obtain nanoparticle powder.
In the present invention, nanoparticles and nanoparticle powders can be used as needed.
The purchase was made in Tongtori, inc., shanghai.
In one embodiment, the solution of polymeric chelant is comprised of ethanol and polymeric chelant, wherein the polymeric chelant is present at 0.1 to 0.2 grams per milliliter of ethanol.
In one embodiment, the polymeric chelant is one of a waterborne alkyd resin, a waterborne acrylic resin, a waterborne epoxy resin, and a waterborne polyurethane.
In a preferred embodiment, the polymeric chelant is a waterborne alkyd resin.
Applicants have found that in the present invention, the stability and dispersibility of the use of waterborne alkyd resin nanoparticles is better. This may be related to the presence of certain hydroxyl groups on the waterborne alkyd.
The waterborne alkyd resin is purchased from Nantong Runfeng petrochemical Co.
In one embodiment, the volume ratio of ethanol to water in the ethanol-water mixture is (3-5): 1.
applicants have found that in the system of the present invention, the volume ratio of ethanol to water is (3-5): the nano-microparticles prepared in the step 1 have better dispersion performance, and the dispersion performance of the nano-microparticles is influenced by too much or too little water, probably because the water content influences the speed of the hydrolysis reaction of the titanium isopropoxide, so that the structure of the nano-microparticles is influenced, and the dispersion performance of the nano-microparticles is influenced.
In one embodiment, the additive is an acidic additive.
In a preferred embodiment, the acidic additive is at least one of acetic acid, formic acid, phthalic acid, benzoic acid, terephthalic acid, benzoic acid.
In a more preferred embodiment, the acidic additive is a mixture of formic acid and oxalic acid, wherein the weight ratio of formic acid to oxalic acid is (3-5): 1.
the applicant has found that when a mixture of formic acid and oxalic acid is used in a certain proportion, the dispersion of the nanoparticles formed is better, which may be related to the strength of the acid of the acidic additive, which varies in acidity, which provides H + On the surface of particles in the systemH + The force between them affects the dispersibility of the force aggregation particles.
In one embodiment, the nanoparticle dispersion system is water and/or SOD nanopowder.
In a second aspect, the invention provides a nano-particle sterilizing, odor-removing and aldehyde-removing composition, which comprises the nano-particles prepared by any one of the methods.
The third aspect of the invention provides application of a nano-microparticle sterilization odor-removing aldehyde-removing composition, wherein the application of the nano-microparticle sterilization odor-removing aldehyde-removing composition comprises treating beriberi, removing peculiar smell and removing formaldehyde. In one embodiment, the nano-particle composition for sterilizing and deodorizing and removing aldehyde comprises any one of the nano-particles or nano-particle powder described above.
In one embodiment, the application of the nano-micro particle sterilization odor-removing and aldehyde-removing composition comprises the treatment of beriberi, odor removal and formaldehyde removal.
In one embodiment, the nano-microparticle bactericidal odor-removing aldehyde-removing composition further comprises SOD nano-water and polyhexamethylene guanidine.
In one embodiment, the weight of the nanoparticle powder is 4-6% of the weight of the nano-SOD water; the weight of the polyhexamethylene guanidine is 0.8 to 1.2 percent of the weight of the nanometer SOD water.
In the invention, the nano SOD water is obtained by mixing nano SOD and water, and the weight of the nano SOD in the water is 0.006-0.008%.
The nanometer SOD is purchased from Shanghai Gu' an company, inc.
In the invention, the nano-microparticle sterilization and odor removal aldehyde-removal composition can be diluted by water and used as aquaculture water, because the nano-microparticles have good dispersibility in water and nano-SOD water, the nano-microparticle sterilization and odor removal composition has excellent sterilization performance as aquaculture water and does not need to be replaced frequently.
The application of the nano-particle sterilizing and deodorizing aldehyde-removing composition is not limited to the above application, and all the nano-particle sterilizing and deodorizing aldehyde-removing compositions using the characteristics of the nano-particles in the invention belong to the protection scope of the invention.
In one embodiment, the sterilizing, deodorizing and aldehyde-removing composition can be used as an additive to prepare beriberi powder and sterilizing insoles, so that the purpose of preventing and treating beriberi is achieved.
In one embodiment, the bactericidal odor-removing aldehyde-removing composition can be used as an additive to prepare adsorbent for air purification, formaldehyde decomposition, etc.
In one embodiment, the water purifying agent can be prepared by using the sterilizing, deodorizing and aldehyde-removing composition as an additive, so as to remove metal ions, microorganisms, bacteria and the like.
In one embodiment, the composition for sterilizing, deodorizing and removing aldehyde can be used as an additive to be added into a skin care product to prepare a sun-screening and whitening skin care product.
In one embodiment, some cleaning materials can be prepared using germicidal odor-reducing aldehyde-removing compositions as additives.
Several specific examples of the present invention are given below, but the present invention is not limited by the examples.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
Example 1
Embodiment 1 of the present invention specifically provides a method for preparing nanoparticles, which comprises the steps of: (1) Mixing titanium isopropoxide and a polymer chelating agent solution and carrying out ultrasonic treatment to obtain a mixed solution A; (2) Placing the mixed solution A, the ethanol-water mixed solution and the additive in an intermittent supercritical fluid treatment device for reaction to obtain nano-microparticles;
the volume ratio of the titanium isopropoxide to the polymer chelating agent solution in the step (1) is 1:3;
the volume ratio of the mixed solution A to the ethanol-water mixed solution in the step (2) is 1:1; the weight of the additive is 25% of that of the titanium isopropoxide;
the ultrasonic treatment temperature in the step (1) is 50 ℃, and the ultrasonic treatment time is 50min;
the reaction temperature in the step (2) is 250 ℃, and the reaction pressure is 6.5MPa;
the polymer chelating agent solution consists of ethanol and a polymer chelating agent, wherein 0.1g of the polymer chelating agent is contained in each milliliter of the ethanol;
the polymer chelating agent is a waterborne alkyd resin;
the volume ratio of ethanol to water in the ethanol-water mixed solution is 3:1;
the additive is an acidic additive;
the acidic additive is a mixture of formic acid and oxalic acid, wherein the weight ratio of the formic acid to the oxalic acid is 3:1.
the purchase was made in Tongtai, inc., shanghai; the waterborne alkyd resin is purchased from Nantong Runfeng petrochemical Co.
Example 2
Embodiment 2 of the present invention specifically provides a method for preparing nanoparticles, which comprises the steps of: (1) Mixing titanium isopropoxide and a polymer chelating agent solution and carrying out ultrasonic treatment to obtain a mixed solution A; (2) Placing the mixed solution A, the ethanol-water mixed solution and the additive into an intermittent supercritical fluid treatment device to react to obtain nano-particles;
in the step (1), the volume ratio of the titanium isopropoxide to the polymer chelating agent solution is 1:4;
the volume ratio of the mixed solution A to the ethanol-water mixed solution in the step (2) is 1:1; the weight of the additive is 30% of that of the titanium isopropoxide;
the ultrasonic treatment temperature in the step (1) is 50 ℃, and the ultrasonic treatment time is 45min;
the reaction temperature in the step (2) is 260 ℃, and the reaction pressure is 6.5MPa;
the polymer chelator solution consists of ethanol and a polymer chelator, wherein 0.2g of the polymer chelator is present per ml of ethanol;
the polymer chelating agent is a waterborne alkyd resin;
the volume ratio of ethanol to water in the ethanol-water mixed solution is 5:1;
the additive is an acidic additive;
the acidic additive is a mixture of formic acid and oxalic acid, wherein the weight ratio of formic acid to oxalic acid is (5.
The purchase was made in Shanghai Tongyun Industrial Co., ltd; the waterborne alkyd resin was purchased from Nantong Runfeng petrochemical Co.
Example 3
Embodiment 3 of the present invention specifically provides a method for preparing nanoparticles, which comprises the steps of: (1) Mixing titanium isopropoxide and a polymer chelating agent solution, and performing ultrasonic treatment to obtain a mixed solution A; (2) Placing the mixed solution A, the ethanol-water mixed solution and the additive into an intermittent supercritical fluid treatment device to react to obtain nano-particles;
in the step (1), the volume ratio of the titanium isopropoxide to the polymer chelating agent solution is 1:3.6;
the volume ratio of the mixed solution A to the ethanol-water mixed solution in the step (2) is 1:1; the weight of the additive is 28 percent of that of the titanium isopropoxide;
the ultrasonic treatment temperature in the step (1) is 55 ℃, and the ultrasonic treatment time is 45min;
the reaction temperature in the step (2) is 270 ℃, and the reaction pressure is 6.8MPa;
the polymer chelator solution consists of ethanol and a polymer chelator, wherein 0.15g of the polymer chelator is present per ml of ethanol;
the polymer chelant is a waterborne alkyd resin;
the volume ratio of ethanol to water in the ethanol-water mixed solution is 4:1;
the additive is an acidic additive;
the acidic additive is a mixture of formic acid and oxalic acid, wherein the weight ratio of the formic acid to the oxalic acid is 4:1.
the purchase was made in Tongtai, inc., shanghai; the waterborne alkyd resin is purchased from Nantong Runfeng petrochemical Co.
Comparative example 1
Comparative example 1 of the present invention specifically provides a preparation of nanoparticles, and the specific embodiment thereof is the same as example 3, except that the volume ratio of ethanol to water is 1:1.
comparative example 2
Comparative example 1 of the present invention specifically provides a preparation of nanoparticles, which is similar to example 3, except that the volume ratio of ethanol to water is 6:1.
comparative example 3
A comparative example 3 of the present invention specifically provides a preparation of nanoparticles, and the specific implementation manner thereof is the same as that of example 3, except that the volume ratio of ethanol to water is 2:1.
comparative example 4
Comparative example 4 of the present invention specifically provides a preparation of nano-microparticles, which is similar to example 3, except that no oxalic acid is used.
Performance test
Respectively adding the nano-microparticles prepared in the examples and the comparative examples into water, nano-SOD water, ethanol and methanol, uniformly mixing and stirring, and then stabilizing for 30min to test the dispersion performance of the nano-microparticles; the addition amount of the nano-micro particles is 25 percent of the weight of the system; evaluation criteria: the dispersing performance was scored by 5 experimenters experienced in the art with a full score of 100 and higher scores indicating better dispersing performance.
Wherein, the nanometer SOD water is obtained by mixing nanometer SOD and water, and the weight of the nanometer SOD in the water is 0.006-0.008%. The nanometer SOD is purchased from Shanghai Gu' an company, inc.
The test results are shown in table 1:
TABLE 1
From the test results in table 1, it can be seen that the nanoparticles provided by the present invention have good dispersibility in water, especially in SOD nanoparticle water.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as can be conceived and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (6)
1. A method for preparing nanoparticles, the method comprising the steps of:
(1) Mixing titanium isopropoxide and a polymer chelating agent solution, and performing ultrasonic treatment to obtain a mixed solution A; the polymer chelating agent is a waterborne alkyd resin;
(2) Placing the mixed solution A, the ethanol-water mixed solution and the additive into an intermittent supercritical fluid treatment device to react to obtain nano-particles; the volume ratio of ethanol to water in the ethanol-water mixed solution is (3-5): 1, the additive is an acidic additive which is a mixture of formic acid and oxalic acid, wherein the weight ratio of the formic acid to the oxalic acid is (3-5): 1; the reaction temperature in the step (2) is higher than 245 ℃ and the reaction pressure is higher than 6.3MPa.
2. The preparation of nanoparticles of claim 1, wherein the volume ratio of titanium isopropoxide to the solution of the polymeric chelating agent in step (1) is 1: (3-4).
3. The method for preparing nano-micro particles according to claim 1, wherein the volume ratio of the mixed solution A to the mixed solution of ethanol and water in the step (2) is 1:1; the weight of the additive is 25-30% of that of the titanium isopropoxide.
4. The method of claim 1, wherein the solution of the polymeric chelating agent is comprised of ethanol and a polymeric chelating agent.
5. A nano-particulate composition for killing bacteria, removing odor and removing aldehydes, wherein the composition comprises nano-particulates prepared according to any one of claims 1 to 4.
6. Use of the nano-micro particle composition for killing bacteria, removing odor and removing aldehyde according to claim 5, wherein the use of the nano-micro particle composition for killing bacteria, removing odor and removing aldehyde comprises removing odor and formaldehyde.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011483764.2A CN112591791B (en) | 2020-12-15 | 2020-12-15 | Preparation of nano-micro-particle and application of sterilization, odor removal and aldehyde removal composition thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011483764.2A CN112591791B (en) | 2020-12-15 | 2020-12-15 | Preparation of nano-micro-particle and application of sterilization, odor removal and aldehyde removal composition thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112591791A CN112591791A (en) | 2021-04-02 |
| CN112591791B true CN112591791B (en) | 2022-10-14 |
Family
ID=75196037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011483764.2A Active CN112591791B (en) | 2020-12-15 | 2020-12-15 | Preparation of nano-micro-particle and application of sterilization, odor removal and aldehyde removal composition thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112591791B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2843955B1 (en) * | 2002-08-30 | 2005-05-20 | Centre Nat Rech Scient | PROCESS FOR THE PREPARATION OF INORGANIC OXIDE POWDERS, CRYSTALLINE COMPOUNDS AND THE USE THEREOF |
| CN1530327A (en) * | 2003-03-12 | 2004-09-22 | 上海拜坡生物科技有限公司 | Preparing method for crystalline nanometer titania material with controllable size |
| US7803347B2 (en) * | 2005-07-01 | 2010-09-28 | Tohoku Techno Arch Co., Ltd. | Organically modified fine particles |
| JP2011045859A (en) * | 2009-08-28 | 2011-03-10 | Tdk Corp | Method for synthesizing powder and method for manufacturing electronic component |
| EP3237332A1 (en) * | 2014-12-23 | 2017-11-01 | Essilor International (Compagnie Générale D'Optique) | A continuous flow process for manufacturing surface modified metal oxide nanoparticles by supercritical solvothermal synthesis |
-
2020
- 2020-12-15 CN CN202011483764.2A patent/CN112591791B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112591791A (en) | 2021-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109202100B (en) | Nano zero-valent iron and preparation method and application thereof | |
| EP3040140B1 (en) | Method of preparing nano-copper powder and nano-copper powder prepared with the same | |
| CN103896389B (en) | Control release type potassium ferrate complex body and Synthesis and applications thereof | |
| JP7120382B2 (en) | Method for producing copper compound fine particle-containing dispersion | |
| CN108940376B (en) | Surface organic complexing copper sulfide Fenton catalyst and synthetic method and application thereof | |
| JP6885146B2 (en) | Antiviral molded body | |
| WO2009107721A1 (en) | Fatty acid metal salt for forming ultrafine metal particle | |
| CN106622128A (en) | Composite nano material for air purification and preparation method of composite nano material | |
| CN111802404B (en) | Nano silver composite antibacterial and sterilizing material | |
| JP6512255B2 (en) | Metal copper fine particles and method for producing the same | |
| CN112591791B (en) | Preparation of nano-micro-particle and application of sterilization, odor removal and aldehyde removal composition thereof | |
| CN107244723A (en) | It is a kind of that there is photocatalysis and purifying agent for polluted water and its application of coagulation composite performance | |
| CN107890869A (en) | Magnetic carries the preparation method of cobalt ordered mesoporous carbon material and its application in catalysis Oxone degraded Levofloxacin Wastewaters | |
| CN108314214B (en) | Process for degrading printing and dyeing wastewater through heterogeneous ozone catalysis | |
| CN112210256A (en) | Odorless anticorrosive finish paint and preparation method thereof | |
| US8747876B2 (en) | Oleophilic antimicrobial composition | |
| KR20200058475A (en) | Metal copper fine particles and manufacturing method thereof | |
| JP5629428B2 (en) | Fatty acid metal salt for forming ultrafine metal particles | |
| JP2005289674A (en) | Method for manufacturing anatase-type titanium dioxide powder | |
| JP5629425B2 (en) | Fatty acid metal salt for forming ultrafine metal particles | |
| CN112210255A (en) | Environment-friendly wall coating with odor removing function and preparation method thereof | |
| CN104445459B (en) | A kind of efficient nano water purification agent and preparation method thereof | |
| JP7392905B1 (en) | Dispersion containing fine metal particles with antimicrobial properties and excellent stability over time | |
| CN112237925A (en) | Catalytic material for degrading organic matters in wastewater and preparation method thereof | |
| CN113956732B (en) | Stain-resistant, odor-free, environment-friendly, antibacterial and antiviral shell paint and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |