CN115606587A - Method for preparing silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater - Google Patents
Method for preparing silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater Download PDFInfo
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- CN115606587A CN115606587A CN202211250354.2A CN202211250354A CN115606587A CN 115606587 A CN115606587 A CN 115606587A CN 202211250354 A CN202211250354 A CN 202211250354A CN 115606587 A CN115606587 A CN 115606587A
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- 229960000892 attapulgite Drugs 0.000 title claims abstract description 69
- 229910052625 palygorskite Inorganic materials 0.000 title claims abstract description 69
- 239000004927 clay Substances 0.000 title claims abstract description 64
- 239000003242 anti bacterial agent Substances 0.000 title claims abstract description 55
- 229910021607 Silver chloride Inorganic materials 0.000 title claims abstract description 52
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 title claims abstract description 52
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 239000013535 sea water Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 39
- 239000000725 suspension Substances 0.000 claims abstract description 16
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 17
- 241000588724 Escherichia coli Species 0.000 claims description 12
- 239000002105 nanoparticle Substances 0.000 claims description 11
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 8
- 241000191967 Staphylococcus aureus Species 0.000 claims description 7
- CQLFBEKRDQMJLZ-UHFFFAOYSA-M silver acetate Chemical compound [Ag+].CC([O-])=O CQLFBEKRDQMJLZ-UHFFFAOYSA-M 0.000 claims description 5
- 229940071536 silver acetate Drugs 0.000 claims description 5
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 241000222122 Candida albicans Species 0.000 claims description 2
- 229940095731 candida albicans Drugs 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- SDLBJIZEEMKQKY-UHFFFAOYSA-M silver chlorate Chemical compound [Ag+].[O-]Cl(=O)=O SDLBJIZEEMKQKY-UHFFFAOYSA-M 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 22
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 108020000946 Bacterial DNA Proteins 0.000 description 1
- 102000018832 Cytochromes Human genes 0.000 description 1
- 108010052832 Cytochromes Proteins 0.000 description 1
- 206010059866 Drug resistance Diseases 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000032770 biofilm formation Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000010408 film Substances 0.000 description 1
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- 239000003112 inhibitor Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- -1 which is expensive Substances 0.000 description 1
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- 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
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- 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
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- 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
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- 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
- A01P3/00—Fungicides
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The invention relates to a method for preparing a silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater. The method comprises the following steps: dispersing low-grade attapulgite clay in concentrated seawater, and stirring for 40-60 min to form a suspension; then adding silver salt into the suspension, and violently stirring for 20-40 min; continuously stirring and reacting for 2-4 h; and finally, carrying out solid-liquid separation to obtain the silver chloride/low-grade attapulgite clay composite antibacterial agent. The raw materials selected by the invention are greener, the preparation cost is lower, and a new way is opened up for the high-added-value functional utilization of natural resources which are abundant in reserves and are urgently to be utilized in China.
Description
Technical Field
The invention relates to a preparation method of a composite antibacterial agent, in particular to a method for preparing a silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater, and belongs to the technical field of high value-added utilization of natural resources and preparation of nano composite materials.
Background
The inorganic antibacterial agent has the advantages of broad spectrum, high efficiency, environmental friendliness and the like, and is more and more concerned by people. The inorganic antibacterial agent mainly comprises metal ion type antibacterial agent (Ag, cu, zn, co, ni, fe, al, sn, mn, ba and other ions) and photocatalytic type antibacterial agent (CuO, tiO) 2 ZnO, etc.) (Materials Science and Engineering: C,2021, 118. The silver ion antibacterial agent can destroy the cell wall of bacteria, interfere the synthesis of bacterial DNA, interfere the electron transfer in a cytochrome system, cause the generation of active oxygen and the like, has a multi-target action mechanism, has strong antibacterial property and broad antibacterial spectrum, is not easy to cause the bacteria to generate drug resistance, and has wide development prospect (Materials Science and Engineering: C,2014, 34.
AgX (X-I, br, cl) is a silver ion antibacterial agent of much interest to researchers, the Ag released by which + Can be used as an inhibitor for biofilm formation, and can continuously inhibit the growth of Escherichia coli for more than 10 days (Materials Science and Engineering: C,2014, 34. Xia et al (Water Res,99 + Can destroy the cell membrane of the microorganism and disturb the normal metabolism of the bacteria, and has potential application value in the antibacterial field. However, agCl nanoparticles are prone to agglomeration and destabilization during preparation, and chemicals (such as ammonium chloride and sodium chloride) are generally used as a chloride ion source during preparation, and the synthesis process is not green enough.
Research shows that AgCl nano particles are loaded to g-C 3 N 4 (Catalysis Communications,2017,100:191-195.)、TiO 2 (Chemical Engineering Journal,2021,403:126359.)、ZnFe 2 O 4 (Materials Today: proceedings,2019, 9. + Thereby producing a long-term antibacterial effect. However, most of these carriers are synthesized from chemical raw materials, which is expensive, and acid, alkali, organic reagent and the like are consumed in the synthesis process, so the synthesis process is not green.
Disclosure of Invention
The invention aims to provide a method for preparing a silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater aiming at the defects existing in the research and utilization of the current AgCl antibacterial agent. The method is a method for preparing the silver chloride/low-grade attapulgite clay composite antibacterial agent by using low-grade attapulgite clay as a carrier, using natural seawater as a chloride ion source and adopting a sol-gel method. The raw materials selected by the method are greener, the preparation cost is lower, and a new way is opened up for the high-added-value functional utilization of natural resources which are abundant in reserves and are urgently to be utilized in China.
The technical scheme of the invention is as follows:
a method for preparing a silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater comprises the following steps:
dispersing low-grade attapulgite clay in concentrated seawater, and stirring for 40-60 min to form a suspension; then adding silver salt into the suspension, and violently stirring for 20-40 min; continuously stirring and reacting for 2-4 h; and finally, carrying out solid-liquid separation to obtain the silver chloride/low-grade attapulgite clay composite antibacterial agent.
Wherein, every 100g of the low-grade attapulgite clay is added into 5 to 50L of concentrated seawater; the content of chloride ions in the concentrated seawater is 40-100 mg/L; the amount of the silver salt added into each 100g of the low-grade attapulgite clay is 30 mmol-0.21 mol.
The low-grade attapulgite clay is clay with the attapulgite content of 10-20%.
The concentration treatment of the seawater is solarization and evaporation under the natural light condition until the content of chloride ions is 40-100 mg/Lmg/L.
The silver salt is one or more of silver nitrate, silver acetate and silver chlorate.
The theoretical generation amount of the silver chloride nano particles is 4.3-30 wt% of the mass of the low-grade attapulgite clay.
The stirring speed of the violent stirring is 4500-6000 r/min; the stirring speed of the ordinary stirring is 1000-2000 r/min.
The application of the silver chloride/low-grade attapulgite clay composite antibacterial agent prepared by the method can be used for inhibiting the growth of staphylococcus aureus, escherichia coli or candida albicans.
The invention has the beneficial effects that:
the invention discloses a method for preparing a silver chloride/low-grade attapulgite clay composite antibacterial agent by using low-grade attapulgite clay as a carrier and natural seawater as a chloride ion source, wherein the antibacterial rates of the composite antibacterial agent on escherichia coli and staphylococcus aureus are respectively as high as 99.98% and 99.88%, the antibacterial activity of the composite antibacterial agent can be comparable to that of pure AgCl, and the composite antibacterial agent is expected to be applied to multiple fields of rubber, films, ceramics, glass, cement and the like. The invention provides a new strategy for green preparation of the silver-series composite antibacterial agent and opens up a new way for high-added-value functional utilization of natural resources which are abundant in reserves and are urgently to be utilized in China.
Drawings
FIG. 1 is an XRD photograph of the silver chloride/low-grade attapulgite clay composite antibacterial agent prepared in example 1;
FIG. 2 is an SEM photograph of the silver chloride/low-grade attapulgite clay composite antibacterial agent prepared in example 1;
FIG. 3 is a test of antibacterial performance of the silver chloride/low-grade attapulgite clay composite antibacterial agent prepared in example 1 on Escherichia coli.
FIG. 4 is a comparison chart of digital photographs of the silver chloride/low-grade attapulgite clay composite antibacterial agent prepared in example 1 before and after being placed outdoors for ten days.
Fig. 5 is a comparison of digital photographs of pure silver chloride before and after being placed outdoors for ten days.
FIG. 6 shows the antibacterial performance test of the silver chloride/low-grade attapulgite clay composite antibacterial agent prepared in example 1 on Escherichia coli after being placed outdoors for ten days.
Detailed Description
The technical solution of the invention is further illustrated below with reference to examples, which are not to be construed as limiting the technical solution.
The attapulgite is a natural clay mineral, has rich mesoporous pore canals, larger specific surface area, good chemical stability, nontoxicity and biocompatibility; through research and analysis, the inventor thinks that the method can try to utilize the good potential of the loading matrix. Meanwhile, the inventor considers that natural seawater contains a large amount of sodium chloride, and a chloride ion source in the AgCl preparation process is expected to be obtained from the natural seawater (although the seawater contains more or less different chloride ions due to different regions, the average content is 19000 ppm.), and considers that the natural seawater is directly used for preparing the AgCl. The method creatively takes the natural attapulgite as a carrier and the natural seawater as a chloride ion source to synthesize the AgCl nano particles, and finally applies the attapulgite to the preparation of the silver chloride/attapulgite clay composite antibacterial agent.
The low-grade attapulgite clay is specifically Gansu Linze attapulgite clay, and the mass content of the attapulgite clay is about 15%; the seawater is taken from the sea-dispelling point of eastern Xinjiang Bay in the new coastal region of Tianjin, and the content of chloride ions in the seawater is about 20 mg/L. The concentration treatment of the seawater is solarization and evaporation under natural light conditions until the content of chloride ions is 50mg/L.
Example 1: adding 100.0g of low-grade attapulgite clay into 50L of concentrated seawater, and stirring for 60min to form uniform suspension; then adding 11.8g (namely 0.071 mol) of silver acetate into the suspension, and stirring vigorously (the stirring speed is 5000 r/min) for 20min to fully dissolve the silver salt and react with chloride ions in the seawater; continuously stirring (the stirring speed is 1500 r/min) for reaction for 2h to ensure that the silver chloride is uniformly deposited on the surface of the low-grade attapulgite clay; and finally, performing solid-liquid separation by using a filter press to obtain the silver chloride/low-grade attapulgite clay composite antibacterial agent. ("theoretical yield of silver chloride nanoparticles is 10.14wt.% of the mass of the low-grade attapulgite clay")
The phase composition of the obtained composite antibacterial agent comprises attapulgite, quartz and silver chloride (as shown in figure 1, XRD, D8ADVANCE, bruker, germany); the silver chloride nanoparticles are uniformly dispersed on the surface of the rod crystals of the attapulgite (as shown in figure 2, SEM, FEI, USA);
the antibacterial rate of the composite antibacterial agent to escherichia coli is 99.99% (as shown in figure 3, the antibacterial experiment refers to the antibacterial performance detection method of the GB/T21510 nano inorganic material; the antibacterial rate of the composite antibacterial agent to escherichia coli after being placed outdoors for 10 days is still 99.77% (as shown in figure 4, the antibacterial experiment refers to the antibacterial performance detection method of the GB/T21510 nano inorganic material), and the composite antibacterial agent shows good stability (compare figures 5 and 6).
Example 2: adding 200.0g of low-grade attapulgite clay into 100L of concentrated seawater, and stirring for 50min to form a uniform suspension; then 26.7g (namely 0.16 mol) of silver acetate is added into the suspension, and the mixture is vigorously stirred (the stirring speed is 5500 r/min) for 40min to fully dissolve the silver salt and react with chloride ions in the seawater; continuously stirring for reaction (the stirring speed is 2000 r/min) for 4h to ensure that the silver chloride is uniformly deposited on the surface of the low-grade attapulgite clay; and finally, performing solid-liquid separation by using a filter press to obtain the silver chloride/low-grade attapulgite clay composite antibacterial agent. ("theoretical yield of silver chloride nanoparticles is 11.48wt.% of the mass of the low-grade attapulgite clay")
The antibacterial rate of the obtained composite antibacterial agent to escherichia coli is 99.81 percent; the antibacterial rate of the composite antibacterial agent to staphylococcus aureus is 99.66%.
Example 3: adding 500.0g of low-grade attapulgite clay into 200L of concentrated seawater, and stirring for 45min to form uniform suspension; then 42.5g (namely 0.25 mol) of silver nitrate is added into the suspension, and the mixture is stirred vigorously (the stirring speed is 6000 r/min) for 30min to ensure that the silver salt is fully dissolved and reacts with chloride ions in the seawater; continuously stirring for reaction (the stirring speed is 1000 r/min) for 4h to ensure that the silver chloride is uniformly deposited on the surface of the low-grade attapulgite clay; and finally, performing solid-liquid separation through a filter press to obtain the silver chloride/low-grade attapulgite clay composite antibacterial agent. ("theoretical yield of silver chloride nanoparticles is 7.18wt.% of the mass of the low-grade attapulgite clay")
The antibacterial rate of the obtained composite antibacterial agent to escherichia coli is 99.11%; the antibacterial rate of the composite antibacterial agent to staphylococcus aureus is 99.25%.
Example 4: adding 300.0g of low-grade attapulgite clay into 100L of concentrated seawater, and stirring for 60min to form uniform suspension; then 16.99g (namely 0.10 mol) of silver nitrate is added into the suspension, and the mixture is stirred vigorously (the stirring speed is 5500 r/min) for 20min to ensure that the silver salt is fully dissolved and reacts with chloride ions in the seawater; continuously stirring for reaction (the stirring speed is 2000 r/min) for 3h to ensure that the silver chloride is uniformly deposited on the surface of the low-grade attapulgite clay; and finally, performing solid-liquid separation through a filter press to obtain the silver chloride/low-grade attapulgite clay composite antibacterial agent. ("theoretical yield of silver chloride nanoparticles is 4.78wt.% of the mass of the low-grade attapulgite clay")
The antibacterial rate of the obtained composite antibacterial agent to escherichia coli is 99.09%; the antibacterial rate of the composite antibacterial agent to staphylococcus aureus is 99.11%.
Example 5: adding 200.0g of low-grade attapulgite clay into 80L of concentrated seawater, and stirring for 60min to form a uniform suspension; then adding 50.96g (namely 0.30 mol) of silver acetate into the suspension, and stirring vigorously (the stirring speed is 5500 r/min) for 40min to fully dissolve the silver salt and react with chloride ions in the seawater; continuously stirring for reaction (the stirring speed is 2000 r/min) for 2h to ensure that the silver chloride is uniformly deposited on the surface of the low-grade attapulgite clay; and finally, performing solid-liquid separation by using a filter press to obtain the silver chloride/low-grade attapulgite clay composite antibacterial agent. ("theoretical yield of silver chloride nanoparticles is 21.53wt.% of the mass of the low-grade attapulgite clay")
The antibacterial rate of the obtained composite antibacterial agent to escherichia coli is 99.99%; the antibacterial rate of the composite antibacterial agent to staphylococcus aureus is 99.95%.
The invention is not the best known technology.
Claims (7)
1. A method for preparing a silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater is characterized by comprising the following steps:
dispersing low-grade attapulgite clay in concentrated seawater, and stirring for 40-60 min to form a suspension; then adding silver salt into the suspension, and violently stirring for 20-40 min; continuously stirring and reacting for 2-4 h; finally, performing solid-liquid separation to obtain a silver chloride/low-grade attapulgite clay composite antibacterial agent;
wherein, every 100g of the low-grade attapulgite clay is added into 5 to 50L of concentrated seawater; the content of chloride ions in the concentrated seawater is 40-100 mg/L; the amount of the silver salt added into each 100g of the low-grade attapulgite clay is 30 mmol-0.21 mol.
2. The method for preparing silver chloride/low-grade attapulgite clay composite antibacterial agent according to claim 1, wherein the low-grade attapulgite clay is clay with attapulgite content of 10-20%.
3. A method for preparing a silver chloride/low-grade attapulgite clay composite antibacterial agent by utilizing seawater is characterized in that the concentration treatment of the seawater is solarization and evaporation under natural light conditions until the content of chloride ions is 40-100 mg/L.
4. The method for preparing the silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater is characterized in that the silver salt is one or more of silver nitrate, silver acetate and silver chlorate.
5. The method for preparing the silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater is characterized in that the theoretical generation amount of silver chloride nano particles is 4.3-30 wt% of the mass of the low-grade attapulgite clay.
6. The method for preparing the silver chloride/low-grade attapulgite clay composite antibacterial agent by using seawater is characterized in that the stirring speed of the violent stirring is 4500-6000 r/min; the stirring speed of the ordinary stirring is 1000-2000 r/min.
7. The use of the silver chloride/low-grade attapulgite clay composite antibacterial agent prepared by the method according to claim 1, characterized in that the silver chloride/low-grade attapulgite clay composite antibacterial agent is used for inhibiting the growth of staphylococcus aureus, escherichia coli or candida albicans.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1568703A (en) * | 2003-07-24 | 2005-01-26 | 合肥工业大学 | Attapulgite-argentum nanometer composite antibiotic material and preparation method thereof |
| CN102408116A (en) * | 2011-08-22 | 2012-04-11 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | Method for improving viscosity of attapulgite clay by seawater immersion |
| CN104383873A (en) * | 2014-11-13 | 2015-03-04 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | Method for preparing composite adsorbent by utilizing low-grade attapulgite clay |
| CN107804854A (en) * | 2017-11-27 | 2018-03-16 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | The method that cupric silicate nanotube is prepared using low-grade attapulgite clay |
| CN109908758A (en) * | 2019-04-24 | 2019-06-21 | 山东大学 | A kind of preparation method of Thief zone, anti-fouling type doped attapulgite-argentum nano composite material reverse osmosis membrane |
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2022
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1568703A (en) * | 2003-07-24 | 2005-01-26 | 合肥工业大学 | Attapulgite-argentum nanometer composite antibiotic material and preparation method thereof |
| CN102408116A (en) * | 2011-08-22 | 2012-04-11 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | Method for improving viscosity of attapulgite clay by seawater immersion |
| CN104383873A (en) * | 2014-11-13 | 2015-03-04 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | Method for preparing composite adsorbent by utilizing low-grade attapulgite clay |
| CN107804854A (en) * | 2017-11-27 | 2018-03-16 | 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心 | The method that cupric silicate nanotube is prepared using low-grade attapulgite clay |
| CN109908758A (en) * | 2019-04-24 | 2019-06-21 | 山东大学 | A kind of preparation method of Thief zone, anti-fouling type doped attapulgite-argentum nano composite material reverse osmosis membrane |
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