CN116918831A - Silver-loaded antibacterial slow-release material and preparation method thereof - Google Patents
Silver-loaded antibacterial slow-release material and preparation method thereof Download PDFInfo
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- CN116918831A CN116918831A CN202310914485.4A CN202310914485A CN116918831A CN 116918831 A CN116918831 A CN 116918831A CN 202310914485 A CN202310914485 A CN 202310914485A CN 116918831 A CN116918831 A CN 116918831A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 49
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 41
- 239000004332 silver Substances 0.000 title claims abstract description 41
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 66
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 20
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 20
- 239000010457 zeolite Substances 0.000 claims abstract description 20
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000010453 quartz Substances 0.000 claims abstract description 16
- 229910001923 silver oxide Inorganic materials 0.000 claims abstract description 16
- 238000000465 moulding Methods 0.000 claims abstract description 15
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 38
- 238000001816 cooling Methods 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 238000000643 oven drying Methods 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- -1 silver ions Chemical class 0.000 abstract description 12
- 241000894006 Bacteria Species 0.000 abstract description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 7
- 238000004090 dissolution Methods 0.000 abstract description 5
- 230000001954 sterilising effect Effects 0.000 abstract description 4
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 4
- 210000002421 cell wall Anatomy 0.000 abstract description 3
- 239000011230 binding agent Substances 0.000 abstract description 2
- 239000003242 anti bacterial agent Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 36
- 230000000845 anti-microbial effect Effects 0.000 description 11
- 239000000047 product Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011863 silicon-based powder Substances 0.000 description 4
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000013354 porous framework Substances 0.000 description 2
- 229910001961 silver nitrate Inorganic materials 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 1
- 241000222122 Candida albicans Species 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940095731 candida albicans Drugs 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- CAEFTTNJCFXOSS-UHFFFAOYSA-N dioxosilane;silver Chemical compound [Ag].O=[Si]=O CAEFTTNJCFXOSS-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- OGFYIDCVDSATDC-UHFFFAOYSA-N silver silver Chemical compound [Ag].[Ag] OGFYIDCVDSATDC-UHFFFAOYSA-N 0.000 description 1
- UKHWJBVVWVYFEY-UHFFFAOYSA-M silver;hydroxide Chemical compound [OH-].[Ag+] UKHWJBVVWVYFEY-UHFFFAOYSA-M 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P1/00—Disinfectants; Antimicrobial compounds or mixtures thereof
Abstract
The silver-loaded antibacterial slow-release material comprises the following raw materials in parts by weight: 20-40 parts of silver oxide, 20-40 parts of metallic silver, 15-40 parts of silicon dioxide, 5-10 parts of zeolite, 5-10 parts of quartz, 1-5 parts of silica sol and 1-5 parts of nano silicon. In the application, after the metallic silver and silver ions contact bacteria, the cell walls of the bacteria can be broken, so that the antibacterial agent has the functions of sterilization and bacteriostasis; the silica and quartz are added to serve as a supporting framework on the structural layer surface and prevent any substances from being dissolved in water, and the silver oxide and the metal silver powder play a role in dissolving silver ions in the framework; the zeolite is of a porous structure, so that the material is rich in a microporous structure, and the problem that the framework is too compact in the subsequent sintering process to influence the dissolution of silver element is avoided; the silica sol is used as a binder in molding, does not dissolve any substances in water and does not affect the dissolution component; the nano silicon powder is coated to prevent the micro pore size non-uniformity on the micro level from affecting the dissolution precision after the framework is sintered.
Description
Technical Field
The application belongs to the technical field of antibacterial materials, and particularly relates to a silver-loaded antibacterial slow-release material and a preparation method thereof.
Background
Because the existing water tank or electric appliance which is easy to store water, such as a water tank of a sweeping robot, a water tank of a humidifier, a water storage disc of an air conditioner and the like, are extremely easy to grow bacteria and bacteria, and endanger the health of human bodies and the service life of the electric appliance, the antibacterial technology of water and air is urgently needed. There are many antibacterial methods in the market, mainly ultraviolet sterilization or antibacterial powder adding into plastic and other materials for molding. However, these methods have many limitations, such as the need for power on for ultraviolet sterilization, high cost, and failure of the method of compounding antimicrobial powder in plastics after the release of the active ingredients is completed.
The antibacterial material is a novel functional material with the function of killing or inhibiting microorganisms, chinese patent CN111644146A discloses a preparation method of a nano silicon dioxide silver-loaded antibacterial material, the size of generated silicon dioxide nano particles is uniform and regular in a secondary aggregate structure by optimizing a nano silicon dioxide synthesis process, nano silicon dioxide is prepared by a gel sol method to serve as a network framework, soluble silver ions are adsorbed in a porous framework of the nano silicon dioxide, and AgNO is adsorbed in the porous framework of the nano silicon dioxide 3 The solution is reduced into nano Ag particles by glucose under the high-temperature alkaline condition, and the nano Ag particles are adsorbed on the surface of nano silicon dioxide to form uniform nano silver particles. The patent uses silicon dioxide as a framework, and nano silver particles reduced by silver nitrate are adsorbed on the surface of the framework to form an antibacterial material, and the antibacterial material has the characteristics of good dispersibility and good antibacterial property. However, the patent does not achieve the effect of slowly releasing silver ions and prolonging the antibacterial time.
Therefore, how to slowly release silver ions in the antibacterial material and prolong the antibacterial time of the material is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the problems, the application provides a silver-loaded antibacterial slow-release material and a preparation method thereof, wherein the slow-release material comprises the following raw materials in parts by weight: 20-40 parts of silver oxide, 20-40 parts of metallic silver, 15-40 parts of silicon dioxide, 5-10 parts of zeolite, 5-10 parts of quartz, 1-5 parts of silica sol and 1-5 parts of nano silicon.
The application also provides a preparation method of the silver-loaded antibacterial slow-release material, which comprises the following steps:
s1: mixing silver oxide powder, metal silver powder and 75% alcohol, grinding into slurry, and granulating;
s2: adding silicon dioxide, zeolite and quartz, grinding into powder, and stirring;
s3: adding silica sol, molding and heat treatment;
s4: coating nanometer silicon powder, and performing secondary heat treatment to obtain a silver-carrying antibacterial slow-release material;
preferably, the specific steps of the heat treatment in step S3 are: oven drying at 50-80deg.C, vacuum sintering at 800-1500deg.C, maintaining the temperature for 1-5 hr, and cooling to room temperature.
Preferably, the specific steps of the heat treatment in step S3 are: oven drying at 60deg.C, vacuum sintering at 1000deg.C, maintaining the temperature for 2 hr, and cooling to room temperature.
Preferably, the specific steps of the secondary heat treatment in step S4 are: heating to 500-1000 deg.C, maintaining for 1-5 hr, and cooling to room temperature.
Preferably, the specific steps of the secondary heat treatment in step S4 are: heating to 600 ℃, preserving heat for 2 hours, and cooling to room temperature.
Preferably, the particle size obtained by granulation in step S1 is 0.05-0.2mm.
Preferably, the size of the molding in step S3 is 1-20mm.
Preferably, the solvent in step S1 is one of alcohol or water.
Preferably, the solvent in step S1 is alcohol.
When alcohol is selected, the alcohol is more volatile, and is faster to dry, thereby being more convenient for subsequent production.
Preferably, the silver-loaded antibacterial slow-release material is applied to a water tank or an electric appliance which is easy to store water, such as a water tank of a sweeping robot, a water tank of a humidifier, a water accumulation disc of an air conditioner and the like.
The application has the following beneficial effects:
1. in the application, after the metallic silver and silver ions contact bacteria, the cell walls of the bacteria can be broken, and the antibacterial silver-silver composite material has the effects of sterilization and bacteriostasis.
2. In the application, the silicon dioxide and the quartz are added to serve as a supporting framework on the structural layer surface and not dissolve any substances in water, so that the dissolved components are not influenced, the effect is equivalent to the effect that the silicon dioxide and the quartz serve as material frameworks, and the silver oxide and the metal silver powder serve as dissolved silver ions in the frameworks; the material with the desired shape can be made by utilizing the skeleton function.
3. In the application, the zeolite is of a porous structure, so that the material is rich in a microporous structure, and the problem that the framework is too compact in the subsequent sintering process to influence the dissolution of silver element is avoided.
4. In the present application, silica sol is used as a binder at the time of molding, and any substance is not eluted in water, and the eluted component is not affected.
5. In the application, the nano silicon powder is coated to prevent the uneven size of micropores on a microscopic level after the framework is sintered from affecting the dissolution precision, and the nano silicon powder with smaller coating granularity fills oversized micropores to make the sizes of all micropores more uniform.
6. In the present application, the combination of silver and silver oxide: the purpose of the silver oxide is that the silver oxide reacts with water to form AgOH, and the AgOH is ionized into Ag + And OH (OH) - ，Ag + The contact with bacteria can break the cell wall, and silver hydroxide or silver nitrate is not directly selected because the whole material is subjected to a hydrolysis process so as to slowly and permanently release Ag + The purpose of the composite Ag simple substance is that the Ag simple substance is changed into AgO, and a reaction process is also provided, and the AgO is hydrolyzed into Ag under the action of water before + Then, ag single substances are changed into AgO later, so that the content of AgO is supplemented, and the whole material can be continuously and effectively used for a long time.
7. In the present application, with respect to the complexation of silica, quartz and zeolite: silica is used as a main skeleton, and silica is also a main component of quartz in order to reduce production cost. The purpose of adding zeolite is to utilize zeolite to have super-multiple micropore structure, and the zeolite can be matched with the zeolite to ensure that the whole framework has micropore structure, so that the framework is not too compact after sintering to influence Ag + And (5) dissolving out.
8. According to the application, silver ions can be slowly released by locking the silver ions in the crystal lattice of the inorganic nonmetallic material, so that the antibacterial effect of slowly dissolving the silver ions in water is achieved, and the dissolving-out amount of the silver ions can be controllable within a certain range because of the precise proportioning in the production process.
9. The silver-loaded antibacterial component is compounded into the inorganic nonmetal, so that the material can be replaced periodically as a consumable, is convenient to use and low in cost, and can slowly release silver ions to achieve the antibacterial effect.
Detailed Description
Example 1: the silver-loaded antibacterial slow-release material consists of the following raw materials in parts by weight: 30 parts of silver oxide, 30 parts of metallic silver, 25 parts of silicon dioxide, 8 parts of zeolite, 8 parts of quartz, 2 parts of silica sol and 2 parts of nano silicon.
The preparation method comprises the following steps:
s1: mixing silver oxide powder, metal silver powder and 75% alcohol, grinding into slurry, and granulating;
s2: adding silicon dioxide, zeolite and quartz, grinding into powder, and stirring;
s3: adding silica sol, molding and heat treatment;
s4: coating nanometer silicon powder, and performing secondary heat treatment to obtain a silver-carrying antibacterial slow-release material;
in the step S1, the solvent is alcohol.
The particle size obtained by granulation in step S1 was 0.1mm.
The specific steps of the heat treatment in the step S3 are as follows: oven drying at 60deg.C, vacuum sintering at 1000deg.C, maintaining the temperature for 2 hr, and cooling to room temperature.
The size of the molding in step S3 was 5mm.
The specific steps of the secondary heat treatment in the step S4 are as follows: heating to 600 ℃, preserving heat for 2 hours, and cooling to room temperature. Example 2: the silver-loaded antibacterial slow-release material consists of the following raw materials in parts by weight: 20 parts of silver oxide, 40 parts of metallic silver, 15 parts of silicon dioxide, 10 parts of zeolite, 5 parts of quartz, 1 part of silica sol and 5 parts of nano silicon.
The preparation method comprises the following steps:
s1: mixing silver oxide powder, metal silver powder and 75% alcohol, grinding into slurry, and granulating;
s2: adding silicon dioxide, zeolite and quartz, grinding into powder, and stirring;
s3: adding silica sol, molding and heat treatment;
s4: coating nanometer silicon powder, and performing secondary heat treatment to obtain a silver-carrying antibacterial slow-release material;
in step S1, the solvent is water.
The particle size obtained by granulation in step S1 was 0.05mm.
The specific steps of the heat treatment in the step S3 are as follows: oven drying at 50deg.C, vacuum sintering at 800deg.C, maintaining the temperature for 5h, and cooling to room temperature.
The size of the molding in step S3 was 1mm.
The specific steps of the secondary heat treatment in the step S4 are as follows: heating to 500 ℃, preserving heat for 5 hours, and cooling to room temperature. Example 3: the silver-loaded antibacterial slow-release material consists of the following raw materials in parts by weight: 40 parts of silver oxide, 20 parts of metallic silver, 40 parts of silicon dioxide, 5 parts of zeolite, 10 parts of quartz, 5 parts of silica sol and 1 part of nano silicon.
The preparation method comprises the following steps:
s1: mixing silver oxide powder, metal silver powder and 75% alcohol, grinding into slurry, and granulating;
s2: adding silicon dioxide, zeolite and quartz, grinding into powder, and stirring;
s3: adding silica sol, molding and heat treatment;
s4: coating nanometer silicon powder, and performing secondary heat treatment to obtain a silver-carrying antibacterial slow-release material;
in step S1, the solvent is water.
The particle size obtained by granulation in step S1 was 20mm.
The specific steps of the heat treatment in the step S3 are as follows: oven drying at 80deg.C, vacuum sintering at 1500deg.C, maintaining the temperature for 1 hr, and cooling to room temperature.
The size of the molding in step S3 was 20mm.
The specific steps of the secondary heat treatment in the step S4 are as follows: heating to 1000 ℃, preserving heat for 1h, and cooling to room temperature. Comparative example 1: in contrast to example 1, the component lacks metallic silver and the preparation method lacks metallic silver.
Comparative example 2: in comparison to example 1, the component lacks zeolite and the preparation process lacks zeolite.
Comparative example 3: in comparison to example 1, the component lacks nano-silicon and the preparation method lacks nano-silicon.
Comparative example 4: in step S1, the size of the pellets was 1mm, and in step S3, the size of the molded pellets was 50mm, as compared with example 1.
Comparative example 5: in comparison with example 1, the specific steps of the heat treatment in step S3 are: oven drying at 100deg.C, vacuum sintering at 2000 deg.C, maintaining the temperature for 2 hr, and cooling to room temperature.
Comparative example 6: in comparison with example 1, the specific steps of the secondary heat treatment in step S4 are: heating to 1500 ℃, preserving heat for 2 hours, and cooling to room temperature.
1. Antibacterial effect test
An antibacterial effect experiment with an oscillation contact time of 24 hours was performed on all examples and comparative examples, and the detection method was adopted as follows: standard test methods for determining antimicrobial activity of an antimicrobial under dynamic contact conditions in ASTM E2149-2020Z.
Evaluation criteria: the antibacterial rate is more than or equal to 90%, the product has stronger antibacterial activity, the antibacterial rate is more than or equal to 50%, the product has antibacterial activity, the antibacterial rate is less than 50%, and the product has no antibacterial activity.
TABLE 1 antibacterial test results
As can be seen from the data in Table 1, example 1 has the best antimicrobial effect against Staphylococcus aureus, candida albicans and Escherichia coli, which can reach 99.99%; from the data analysis of the embodiment 1 and the embodiment 2 and the embodiment 3, the parts of each component of the silver-loaded antibacterial slow-release material and each parameter value of the preparation method also influence the antibacterial effect; comparative example 1, comparative example 2, comparative example 1, comparative example 3, comparative example 1, comparative example 2, comparative example 3, comparative example 1, comparative example 2, comparative example 3, and comparative example 1, the antimicrobial effect of which is much worse than that of example 1, and the components of example 1 are seen to be indispensable; the antibacterial effect of comparative examples 4, 5, 6 was much worse than that of example 1, and it can be seen that the granulating size, the molding size, the heat treatment and the temperature of the secondary heat treatment of the preparation method of example 1 all have an influence on the antibacterial effect of the final product.
2. Antimicrobial durability test
Water-through experiments were performed on all examples and comparative examples: the colony count of raw water is detected, the product is put into a filter element, the raw water is introduced, and the colony count of water flowing out of the filter element is detected.
The detection standard is as follows: when the colony count in the filtered water reaches 20% of the colony count of the raw water, stopping the water feeding experiment, and counting the water consumption.
TABLE 2 Water flow test results
| Excess water (L) | |
| Example 1 | 10000 |
| Example 2 | 8000 |
| Example 3 | 7800 |
| Comparative example 1 | 2000 |
| Comparative example 2 | 5000 |
| Comparative example 3 | 4000 |
| Comparative example 4 | 4500 |
| Comparative example 5 | 3900 |
| Comparative example 6 | 4200 |
As can be seen from the data in Table 2, the maximum water content of example 1 indicates that the product of example 1 has the best antimicrobial durability; from the data analysis of the embodiment 1 and the embodiment 2 and the embodiment 3, the parts of each component of the silver-loaded antibacterial slow-release material and each parameter value of the preparation method also influence the antibacterial durability; comparative example 1, comparative example 2, comparative example 1, comparative example 3, comparative example 1, comparative example 2, comparative example 3, and comparative example 1, wherein the component lacks metallic silver, and the component lacks nano silicon, the antimicrobial durability of comparative examples 1, 2, 3 is much worse than that of example 1, and it can be seen that the component of example 1 is indispensable and has a very important influence on the antimicrobial durability; the antimicrobial durability of comparative examples 4, 5, 6 is much worse than that of example 1, and it can be seen that the granulating size, the molding size, the heat treatment and the temperature of the secondary heat treatment of the preparation method of example 1 all have an influence on the antimicrobial durability of the final product.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (10)
1. The silver-loaded antibacterial slow-release material is characterized by comprising the following raw materials in parts by weight: 20-40 parts of silver oxide, 20-40 parts of metallic silver, 15-40 parts of silicon dioxide, 5-10 parts of zeolite, 5-10 parts of quartz, 1-5 parts of silica sol and 1-5 parts of nano silicon.
2. A method for preparing the silver-loaded antibacterial slow-release material according to claim 1, which is characterized by comprising the following steps:
s1: mixing silver oxide powder, metal silver powder and a solvent, grinding into slurry, and granulating;
s2: adding silicon dioxide, zeolite and quartz, grinding into powder, and stirring;
s3: adding silica sol, molding and heat treatment;
s4: coating nanometer silica powder, and performing secondary heat treatment to obtain the silver-carrying antibacterial slow-release material.
3. The preparation method according to claim 2, wherein the specific steps of the heat treatment in step S3 are: oven drying at 50-80deg.C, vacuum sintering at 800-1500deg.C, maintaining the temperature for 1-5 hr, and cooling to room temperature.
4. A method according to claim 3, wherein the specific step of heat treatment in step S3 is: oven drying at 60deg.C, vacuum sintering at 1000deg.C, maintaining the temperature for 2 hr, and cooling to room temperature.
5. The preparation method according to claim 2, wherein the specific steps of the secondary heat treatment in step S4 are: heating to 500-1000 deg.C, maintaining for 1-5 hr, and cooling to room temperature.
6. The method according to claim 5, wherein the secondary heat treatment in step S4 comprises the specific steps of: heating to 600 ℃, preserving heat for 2 hours, and cooling to room temperature.
7. The process according to claim 2, wherein the particle size obtained by granulation in step S1 is 0.05-0.2mm.
8. The method of claim 2, wherein the size of the molding in step S3 is 1-20mm.
9. The method according to claim 2, wherein the solvent in step S1 is one of alcohol and water.
10. The silver-carrying antibacterial slow-release material according to claim 1, which is characterized by being applied to a water tank or an electric appliance easy to store water.
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| CN202310914485.4A CN116918831B (en) | 2023-07-25 | 2023-07-25 | Silver-loaded antibacterial slow-release material and preparation method thereof |
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| CN202310914485.4A CN116918831B (en) | 2023-07-25 | 2023-07-25 | Silver-loaded antibacterial slow-release material and preparation method thereof |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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