CN114573331A - Antibacterial scale-inhibiting ceramic material and preparation method and application thereof - Google Patents
Antibacterial scale-inhibiting ceramic material and preparation method and application thereof Download PDFInfo
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- CN114573331A CN114573331A CN202210261040.6A CN202210261040A CN114573331A CN 114573331 A CN114573331 A CN 114573331A CN 202210261040 A CN202210261040 A CN 202210261040A CN 114573331 A CN114573331 A CN 114573331A
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- antibacterial
- scale
- inhibiting
- diatomite
- heat preservation
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- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000019821 dicalcium diphosphate Nutrition 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
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- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
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Abstract
The invention provides an antibacterial scale-inhibiting ceramic material and a preparation method and application thereof, wherein the preparation method of the antibacterial scale-inhibiting ceramic material comprises the following steps: after uniformly mixing the diatomite and the antibacterial solution, sequentially stirring, standing, dehydrating, drying, grinding and sieving to obtain antibacterial diatomite; heating a solvent, a binder and a surfactant, uniformly mixing, and uniformly mixing with antibacterial diatomite to obtain antibacterial scale-inhibiting ceramic powder; and sequentially carrying out casting mold forming, demolding, drying, sintering and cooling treatment on the antibacterial scale-inhibiting ceramic powder to obtain the scale-inhibiting antibacterial ceramic material. The invention has the characteristics of good antibacterial effect, strong scale inhibition performance, long scale inhibition life and good water purification effect, and can effectively solve the problems of bacteria breeding and blockage of the ceramic water purification material.
Description
Technical Field
The invention relates to the technical field of ceramic materials, in particular to an antibacterial scale-inhibiting ceramic material and a preparation method and application thereof.
Background
The ceramic water purifier is a water purifier using a ceramic filter element for filtration, and is mainly used for filtering and activating daily drinking water to filter soluble heavy metal ions, harmful residual chlorine and suspended pollutants, colors and peculiar smells in the water, so that the drinking water reaching a certain drinking standard is obtained by filtration. At present, most ceramic filter core materials are easy to form scale on the surface of the ceramic water purifier and breed bacteria in the process of using the ceramic water purifier for a long time in complex water quality, so that the ceramic water purifier is blocked, and the filtering effect and the service life of the ceramic water purifier are influenced.
In order to overcome the problems, the development of a ceramic filter element with good antibacterial effect, strong scale inhibition performance, long scale inhibition service life and good water purification effect is urgently needed, and the problems of bacteria breeding and blockage of ceramics are solved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an antibacterial scale-inhibiting ceramic material and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: a preparation method of an antibacterial scale-inhibiting ceramic material comprises the following steps:
(1) adding diatomite into the antibacterial solution, uniformly mixing, and then sequentially stirring, standing, dehydrating, drying, grinding and sieving to obtain antibacterial diatomite; the antimicrobial solution comprises at least two of an antimicrobial agent, water, polyvinylpyrrolidone and ethylene glycol; the antibacterial agent is an inorganic antibacterial agent comprising: at least one of a silver-based antibacterial agent, a zinc-based antibacterial agent, a copper-based antibacterial agent, and a titanium dioxide antibacterial agent;
(2) heating a solvent, a binder and a surfactant, and uniformly mixing to obtain a mixture A;
(3) uniformly mixing the mixture A, the antibacterial diatomite and the scale inhibition ingredient to obtain antibacterial scale inhibition ceramic powder;
(4) and sequentially carrying out casting mold forming, demolding, drying, sintering, cooling and treatment on the antibacterial scale-inhibiting ceramic powder to obtain the scale-inhibiting antibacterial ceramic material.
The invention provides a solution for a ceramic filter element material capable of resisting bacteria and inhibiting scale, aiming at the problem that the ceramic filter element material cannot resist bacteria and inhibit scale. The invention adopts the addition of the scale inhibition ingredient to optimize the internal space of the filter element, so that the ceramic filter element can be suitable for the condition of complex water quality and the service life of the ceramic filter element can be obviously prolonged. Meanwhile, the problem that bacteria are easy to breed in the ceramic filter element material is solved by adding the antibacterial diatomite, and the antibacterial diatomite has antibacterial performance. The preparation method is simple, has antibacterial and scale inhibiting properties, and is suitable for large-scale production, popularization and application.
As a preferred embodiment of the invention, in the step (1), the uniform mixing mode is stirring at the rotation speed of 600-800r/min for 3-6 h; the drying temperature is 100-120 ℃, and the drying time is 2-4 h.
The inventor finds that the trace heavy metal content in the diatomite can be reduced by stirring and drying, so that the diatomite meets the drinking water standard.
As a preferred embodiment of the invention, the mass ratio of the diatomite to the antibacterial solution is 1 (5-20); the mass concentration of the antibacterial agent in the antibacterial solution is 0.1-7%.
The inventor finds that when the content of the antibacterial agent is more than 7%, on one hand, the release rate of the antibacterial agent is not easy to control due to the fact that redundant antibacterial agent cannot be fused with diatomite during high-temperature sintering, exceeds the drinking water standard and does not meet the GB/T5750.6-2006 drinking water standard; on the other hand, the load of the diatomite on the antibacterial agent is exceeded, so that resource waste is caused, and the cost is increased.
In a preferred embodiment of the present invention, the mass ratio of the diatomaceous earth to the antibacterial solution is 1 (8-17).
In a preferred embodiment of the present invention, in step (2), the mass ratio of the solvent, the binder and the surfactant in the mixture a is: adhesive: surfactant ═ (70-85): (5-15): (2-10). As a more preferred embodiment of the present invention, in the step (2), the mass ratio of the solvent, the binder and the surfactant in the mixture a is: adhesive: surfactant ═ (83-85): (10-11): (5-6).
In a preferred embodiment of the present invention, in step (3), the antibacterial diatomite, the scale inhibiting ingredient and the mixture a are mixed in a mass ratio of antibacterial diatomite: scale inhibition and proportioning: mixture a ═ (55-70): (10-25): (10-20). As a more preferred embodiment of the present invention, in the step (3), the antibacterial diatomite, the scale inhibiting ingredient and the mixture a have a mass ratio of antibacterial diatomite: scale inhibition and proportioning: mixture a ═ (65-63): (19-21): (15-18).
As a preferred embodiment of the present invention, the diatomaceous earth comprises the following components in percentage by weight: 85-95% of silicon dioxide, 1-5% of titanium oxide, 0-5% of sodium oxide, 1-5% of bismuth oxide, 1-5% of magnesium oxide and 1-3% of aluminum oxide.
As a preferred embodiment of the present invention, the diatomaceous earth comprises the following components by weight: 95% of silicon dioxide, 1% of titanium oxide, 1% of bismuth oxide, 2% of magnesium oxide and 1% of aluminum oxide.
As a preferred embodiment of the present invention, the solvent includes water and/or an organic solvent; the organic solvent comprises at least one of terpineol, ethylene glycol, isopropanol, butyl carbitol, mixed dibasic acid ester, diethyl adipate and tributyl citrate; the binder comprises at least one of epoxy resin, carboxymethyl cellulose, propylene glycol alginate, methyl cellulose, sodium starch phosphate, sodium carboxymethyl cellulose, sodium alginate, casein, sodium polyacrylate, polyoxyethylene, starch, acacia, pectin, agar, gelatin, alginate jelly, carrageenan and dextrin; the surfactant comprises a dispersant and/or a silane coupling agent; the dispersing agent comprises at least one of sodium dodecyl benzene sulfonate, triethylhexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, Gule gum and fatty acid polyglycol ester; the silane coupling agent comprises at least one of vinyl silane, amino silane, epoxy silane, mercapto silane and methacryloxy silane.
As a preferred embodiment of the invention, the scale inhibition ingredient has a chemical formula as follows: xNa2O·yCaO·zMgO·(100-x-y-z)P2O5Wherein 0 is<x≤40、0<y≤25、0<z≤25、15≤100-x-y-z≤65。
As a preferred embodiment of the invention, the scale inhibition ingredient has a chemical formula as follows: xNa2O·yCaO·zMgO·(100-x-y-z)P2O5Therein 9 of<x≤10、16<y≤25、15<z≤20、45≤100-x-y-z≤60。
As a preferred embodiment of the present invention, the scale inhibiting ingredient is prepared from the following raw materials: a sodium source, a calcium source, a magnesium source, and a phosphorus source; the sodium source comprises at least one of sodium carbonate, sodium bicarbonate, sodium hydroxide, sodium oxide, sodium hexametaphosphate and sodium tripolyphosphate; the calcium source comprises at least one of calcium oxide, calcium pyrophosphate, calcium carbonate, calcium bicarbonate, calcium hydroxide, calcium dihydrogen phosphate and calcium stearate; the magnesium source comprises at least one of magnesium oxide, magnesium hydroxide, magnesium carbonate and magnesium stearate; at least one of sodium hexametaphosphate, sodium tripolyphosphate, phosphoric acid, ammonium dihydrogen phosphate, phosphorus pentoxide, calcium dihydrogen phosphate and sodium pyrophosphate.
As a preferred embodiment of the present invention, the sintering is a programmed sintering; the programmed sintering is sequentially carried out with a first heat preservation stage, a second heat preservation stage and a third heat preservation stage; the temperature of the first heat preservation stage is 150-; the temperature of the second heat preservation stage is 530-650 ℃, the heating rate is 5-10 ℃/min, and the heat preservation time is 1-2 h; the temperature of the third heat preservation stage is 880-1000 ℃, the heating rate is 5-10 ℃/min, and the heat preservation time is 60-200 min.
The invention also provides the antibacterial scale-inhibiting ceramic material prepared by any one of the methods.
The invention also provides an application of any one of the antibacterial and scale-inhibiting ceramic materials in water purification.
Compared with the prior art, the invention has the beneficial effects that:
(1) the preparation method is simple and is suitable for large-scale production, popularization and application.
(2) Compared with the conventional ceramic tube, the invention has the antibacterial and scale-inhibiting properties, is suitable for being used under the condition of complex water quality, and can obviously prolong the service life of the ceramic filter element.
(3) The antibacterial scale-inhibiting ceramic tube prepared by the material has high scale inhibition rate and large flow, and the colony count and the metal ion content in water meet the national standard.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples. In the examples, unless otherwise specified, the experimental methods are all conventional methods; unless otherwise indicated, all reagents and materials are commercially available.
Example 1
Embodiment 1 is an embodiment of the antibacterial scale-inhibiting ceramic tube of the present invention, and the preparation method comprises the following steps:
(1) weighing 201g of zinc nitrate, dissolving the zinc nitrate in 25L of water, stirring the zinc nitrate for 0.5h at the rotating speed of 600r/min to fully dissolve the zinc nitrate, then slowly adding ammonia water under the stirring state at the rotating speed of 400r/min until formed precipitates completely disappear under stirring, and stopping adding the ammonia water; 1.5kg of diatomaceous earth (silica 95%, titanium oxide 1%, bismuth oxide 1%, magnesium oxide 2%, aluminum oxide 1%) was added with stirring at a speed of 800r/min, stirring was continued for 4h, then dehydration was carried out, drying was carried out at 120 ℃ for 2h to obtain ZnO/diatomaceous earth, which was ground and sieved with a 120-mesh sieve.
(2) Heating 850g of terpineol to 80 ℃, adding 40g of methyl amyl alcohol and 10g of vinyl silane while stirring at the rotating speed of 400r/min, after uniformly mixing, slowly adding 100g of methyl cellulose while stirring at the rotating speed of 500r/min, stirring at the rotating speed of 600r/min for 1h to fully dissolve the methyl cellulose, and cooling the mixture for later use;
(3) weighing 650g of antibacterial diatomite and 200g of scale inhibition ingredient 10Na2O·25CaO·20MgO·45P2O5Stirring for 1h at the rotating speed of 1000r/min, uniformly mixing, slowly adding 150g of the mixture under the stirring state at the rotating speed of 800r/min, and continuously stirring for 1.5h at the rotating speed of 1200r/min until the mixture is uniformly mixed;
(4) placing the scale-inhibiting antibacterial ceramic precursor in a stainless steel mold, molding, drying, heating and sintering according to a program, and naturally cooling to obtain the scale-inhibiting antibacterial ceramic filter element. The programmed sintering is carried out sequentially in a first heat preservation stage, a second heat preservation stage and a third heat preservation stage; the temperature of the first heat preservation stage is 200 ℃, the heating rate is 5 ℃/min, and the heat preservation time is 1 h; the temperature of the second heat preservation stage is 600 ℃, the heating rate is 8 ℃/min, and the heat preservation time is 1 h; the temperature of the third heat preservation stage is 1000 ℃, the heating rate is 8 ℃/min, and the heat preservation time is 120 min.
Example 2
Embodiment 2 is an embodiment of the antibacterial scale-inhibiting ceramic tube of the present invention, and the preparation method comprises the following steps:
(1) 121g of Cu (NO) was weighed3)2·3H2Dissolving O powder in 10L of pure water to form a uniform solution, and continuously stirring for 30min at the rotating speed of 600 r/min. Adding 1.2kg of diatomite (95% of silicon dioxide, 1% of titanium oxide, 1% of bismuth oxide, 2% of magnesium oxide and 1% of aluminum oxide) into the solution, continuously stirring for 3 hours at the rotating speed of 1000r/min, weighing 36g of polyvinylpyrrolidone (PVP), dissolving the polyvinylpyrrolidone (PVP) in 9L of Ethylene Glycol (EG), and uniformly mixing with the copper nitrate solution after the polyvinylpyrrolidone (PVP) is completely dissolved; transferring the mixed solution into a hydrothermal synthesis reaction kettle (50L), sealing, heating by program, and reacting at 170 deg.C for 60 min; after the reaction is finished and the reaction kettle is naturally cooled to room temperature, drying for 4 hours at 100 ℃ after dehydration to obtain Cu2Grinding and sieving with 120 mesh sieve;
(2) heating 830g of terpineol to 85 ℃, adding 50g of sodium dodecyl benzene sulfonate and 10g of mercaptosilane while stirring, uniformly mixing, slowly adding 110g of ethyl cellulose while stirring, fully dissolving, and cooling the mixture for later use;
(3) 630g of antibacterial diatomite and 210g of scale inhibition ingredient 9Na are weighed2O·16CaO·15MgO·60P2O5Stirring for 1h at the rotating speed of 1000r/min, uniformly mixing, slowly adding 160g of the mixture under the stirring state at the rotating speed of 800r/min, and continuously stirring for 1.5h at the rotating speed of 1200r/min until the mixture is uniformly mixed;
(4) placing the scale-inhibiting antibacterial ceramic precursor in a stainless steel mold, molding, drying, heating and sintering according to a program, and naturally cooling to obtain the scale-inhibiting antibacterial ceramic filter element. The programmed sintering is sequentially carried out with a first heat preservation stage, a second heat preservation stage and a third heat preservation stage; the temperature of the first heat preservation stage is 200 ℃, the heating rate is 5 ℃/min, and the heat preservation time is 1 h; the temperature of the second heat preservation stage is 580 ℃, the heating rate is 7 ℃/min, and the heat preservation time is 1 h; the temperature of the third heat preservation stage is 980 ℃, the heating rate is 8 ℃/min, and the heat preservation time is 150 min.
Example 3
Embodiment 3 is an embodiment of the antibacterial and scale-inhibiting ceramic tube of the present invention, and the preparation method comprises the following steps:
(1) 1.2kg of diatomite (silica 95%, titanium oxide 1%, bismuth oxide 1%, magnesium oxide 2% and aluminum oxide 1%) is weighed and dissolved in 10L of pure water to form a uniform solution, and then the solution is continuously stirred for 30min at the rotating speed of 600 r/min. 45g of polyvinylpyrrolidone (PVP) was weighed into 9L of Ethylene Glycol (EG), and after complete dissolution 600ml of 0.1M/L AgNO was slowly added3After being uniformly mixed, the mixture is slowly added into the diatomite solution at the rotating speed of 600r/min, the mixture is continuously stirred for 1 hour, kept stand for 0.5H and stirred for 1 hour again, and the stirring is repeated for 3 times; drying at 100 deg.C for 4 hr to obtain Ag/diatomite, grinding, and sieving with 120 mesh sieve;
(2) heating 826g of water to 75 ℃, adding 52g of polyacrylamide and 12g of methacryloxy silane under stirring at the rotating speed of 500r/min, uniformly mixing, slowly adding 110g of propylene glycol alginate protease under stirring at the rotating speed of 600r/min, fully dissolving, and cooling the mixture for later use.
(3) 630g of antibacterial diatomite and 190g of scale inhibition ingredient 9Na are weighed2O·18CaO·16MgO·57P2O5Stirring for 1h at the rotating speed of 1000r/min, uniformly mixing, slowly adding 180g of the mixture under the stirring state at the rotating speed of 800r/min, and continuously stirring for 1.5h at the rotating speed of 1200r/min until the mixture is uniformly mixed;
(4) placing the scale-inhibiting antibacterial ceramic precursor into a stainless steel mold, molding by a casting mold, drying, heating and sintering according to a program, and naturally cooling after sintering to obtain the scale-inhibiting antibacterial ceramic filter element. The procedure sintering is sequentially carried out in a first heat preservation stage, a second heat preservation stage and a third heat preservation stage; the temperature of the first heat preservation stage is 180 ℃, the heating rate is 5 ℃/min, and the heat preservation time is 1 h; the temperature of the second heat preservation stage is 550 ℃, the heating rate is 8 ℃/min, and the heat preservation time is 1 h; the temperature of the third heat preservation stage is 950 ℃, the heating rate is 8 ℃/min, and the heat preservation time is 120 min.
Comparative example 1
Comparative example 1 is a comparative example of a scale inhibiting ceramic pipe made of the scale inhibiting ceramic material of the present invention, and the preparation method comprises the following steps:
(1) heating 850g of water to 80 ℃, adding 40g of sodium dodecyl benzene sulfonate and 10g of vinyl silane while stirring at the rotating speed of 400r/min, after uniformly mixing, slowly adding 100g of methyl cellulose while stirring at the rotating speed of 500r/min, stirring for 1H at the rotating speed of 800r/min to fully dissolve the methyl cellulose, and cooling the mixture for later use;
(2) weighing 820g of diatomite (95% of silicon dioxide, 1% of titanium oxide, 1% of bismuth oxide, 2% of magnesium oxide and 1% of aluminum oxide), slowly adding 180g of the mixture under the stirring state at the rotating speed of 500r/min, and continuously stirring for 1.5h at the rotating speed of 1200r/min until the mixture is uniformly mixed;
(3) placing the ceramic precursor in a stainless steel mold, molding, drying, heating and sintering according to a program, and naturally cooling to obtain the ceramic filter element. The procedure sintering was the same as in example 1.
Comparative example 2
Comparative example 2 is a comparative example of a scale inhibition ceramic tube made of the scale inhibition ceramic material of the present invention, and comparative example 2 has the same composition and preparation method as example 1 except that diatomaceous earth (silica 95%, titanium oxide 1%, bismuth oxide 1%, magnesium oxide 2%, alumina 1%) is used instead of the antibacterial diatomaceous earth of example 1.
The inventor prepares the scale inhibiting ceramic materials of examples 1-3 and comparative examples 1-2 into the antibacterial scale inhibiting ceramic tube and carries out comprehensive performance tests, and the results are shown in table 1. Wherein the colony number is the microbial index according to the standard test method of domestic drinking water of national standard GB/T5750.12-2006; the detection of the metal ions is to detect the indexes of the metal ions according to the standard detection method of domestic drinking water of national standard GB/T5750.6-2006; the flow rate refers to the flow rate of water which can be purified by the scale-inhibiting antibacterial ceramic pipe, and the unit is liter (L); the scale inhibition rate is the deposition rate of calcium carbonate determined by detecting the scale inhibition performance of the water treatment agent according to GB/T16632-2008.
TABLE 1 colony counts and Metal ion test results for examples 1-3 and comparative examples 1-2
TABLE 2 results of scale inhibition performance test of examples 1-3 and comparative examples 1-2
| Examples | Flow (L) | Flow rate (L/min) | Scale inhibition Rate (%) |
| Example 1 | 900 | 2 | 95.0 |
| Example 2 | 1000 | 2 | 92.4 |
| Example 3 | 920 | 2 | 93.2 |
| Comparative example 1 | 180 | 2 | 22.8 |
| Comparative example 2 | 900 | 2 | 94.7 |
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The preparation method of the antibacterial scale-inhibiting ceramic material is characterized by comprising the following steps:
(1) adding diatomite into the antibacterial solution, uniformly mixing, and then sequentially stirring, standing, dehydrating, drying, grinding and sieving to obtain antibacterial diatomite; the antimicrobial solution comprises at least two of an antimicrobial agent, water, polyvinylpyrrolidone and ethylene glycol; the antibacterial agent is an inorganic antibacterial agent comprising: at least one of a silver-based antibacterial agent, a zinc-based antibacterial agent, a copper-based antibacterial agent, and a titanium dioxide antibacterial agent;
(2) heating a solvent, a binder and a surfactant, and uniformly mixing to obtain a mixture A;
(3) uniformly mixing the mixture A, the antibacterial diatomite and the scale inhibition ingredient to obtain antibacterial scale inhibition ceramic powder;
(4) and sequentially carrying out casting mold forming, demolding, drying, sintering and cooling treatment on the antibacterial scale-inhibiting ceramic powder to obtain the scale-inhibiting antibacterial ceramic material.
2. The preparation method according to claim 1, wherein the mass ratio of the diatomite to the antibacterial solution is 1 (5-20); the mass concentration of the antibacterial agent in the antibacterial solution is 0.1-7%.
3. The preparation method according to claim 1, wherein in the step (2), the mass ratio of the solvent, the binder and the surfactant in the mixture A is that: adhesive: surfactant ═ (70-85): (5-15): (2-10).
4. The preparation method according to claim 1, wherein in the step (3), the antibacterial diatomite and the scale inhibition ingredient are mixed in a mass ratio of antibacterial diatomite: scale inhibition and proportioning: mixture a ═ (55-70): (10-25): (10-20).
5. The preparation method according to claim 1, wherein the diatomite comprises the following components in percentage by weight: 85-95% of silicon dioxide, 1-5% of titanium oxide, 0-5% of sodium oxide, 1-5% of bismuth oxide, 1-5% of magnesium oxide and 1-3% of aluminum oxide.
6. The production method according to claim 1, wherein the solvent comprises water and/or an organic solvent; the organic solvent comprises at least one of terpineol, ethylene glycol, isopropanol, butyl carbitol, mixed dibasic acid ester, diethyl adipate and tributyl citrate; the binder comprises at least one of epoxy resin, carboxymethyl cellulose, propylene glycol alginate, methyl cellulose, sodium starch phosphate, sodium carboxymethyl cellulose, sodium alginate, casein, sodium polyacrylate, polyoxyethylene, starch, acacia, pectin, agar, gelatin, alginate jelly, carrageenan and dextrin; the surfactant comprises a dispersant and/or a silane coupling agent; the dispersing agent comprises at least one of sodium dodecyl benzene sulfonate, triethylhexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, Guel gum and fatty acid polyglycol ester; the silane coupling agent comprises at least one of vinyl silane, amino silane, epoxy silane, mercapto silane and methacryloxy silane.
7. The preparation method of claim 1, wherein the scale inhibiting ingredient has a chemical formula of: xNa2O·yCaO·zMgO·(100-x-y-z)P2O5Wherein 0 is<x≤40、0<y≤25、0<z≤25、15≤100-x-y-z≤65。
8. The production method according to claim 1, wherein the sintering is a programmed sintering; the programmed sintering is sequentially carried out with a first heat preservation stage, a second heat preservation stage and a third heat preservation stage; the temperature of the first heat preservation stage is 150-; the temperature of the second heat preservation stage is 530-650 ℃, the heating rate is 5-10 ℃/min, and the heat preservation time is 1-2 h; the temperature of the third heat preservation stage is 880-1000 ℃, the heating rate is 5-10 ℃/min, and the heat preservation time is 60-200 min.
9. An antibacterial and antisludging ceramic material prepared by the preparation method of any one of claims 1 to 8.
10. The use of the antibacterial and scale-inhibiting ceramic material of claim 9 in a water purification device.
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