CN111449086A - Colloidal silver/polymer mixed disinfectant and preparation method and application thereof - Google Patents
Colloidal silver/polymer mixed disinfectant and preparation method and application thereof Download PDFInfo
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- 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
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- 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
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- 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
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- 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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Abstract
The invention discloses a colloidal silver/polymer mixed disinfectant, a preparation method and application thereof. The colloidal silver/polymer mixed disinfectant comprises a nano silver colloid and a water-soluble polymer, wherein the mass ratio of the nano silver colloid to the water-soluble polymer is (1-5.4): 1; wherein the concentration of the nano silver colloid is 10-100 ppm, and the solvent is a volatile polar solvent. The preparation method comprises the following steps: 1) dissolving a silver compound in deionized water, and adding a surfactant and a reducing agent to obtain a precursor solution; 2) performing microwave reaction on the precursor solution, and dispersing the obtained precipitate in a volatile polar solvent to obtain a nano silver colloid; 3) the nano silver colloid and the water-soluble polymer are uniformly mixed to obtain the colloidal silver/polymer mixed disinfectant. The preparation method is simple, the obtained mixed disinfectant can form a film layer when used, the slow release of silver is protected and controlled, the effective sterilization time of the silver is prolonged, the blackening phenomenon can not occur after long-time use, and the mixed disinfectant can be widely applied to public health disinfection.
Description
Technical Field
The invention relates to the field of nano-silver disinfection, in particular to a colloidal silver/polymer mixed disinfectant and a preparation method and application thereof.
Background
The use of organic antibacterial agents in public health has problems of poor safety, easy generation of drug resistance by microorganisms, poor drug resistance and the like, so that the use of inorganic antibacterial agents such as nano silver has received much attention in recent years. The bactericidal action of the nano-silver is probably related to the damage of cell membranes by surface free radicals, and can kill various moulds and viruses such as escherichia coli, staphylococcus aureus, bacillus subtilis, avian influenza virus and the like, and the nano-silver shows quantum effect, small-size effect and extremely large specific surface area due to the mesomorphic arrangement of the nano-silver between solid and molecules, has antibacterial activity far superior to silver ions, the antibacterial concentration of the silver ions is at the micromolar level, the antibacterial concentration of the nano-silver is at the nanomolar level, and the nano-silver with extremely low concentration can achieve good antibacterial effect and is long-acting, ecological and low in harm. The American FDA has already authorized the nano-silver product to be clinically seen in the consumption market of nano-silver in developed countries due to a plurality of varieties such as food packages, toys for children, medical coatings and equipment for cosmetics and the like, and has good application prospect.
The emergence of the present novel coronavirus has caused huge threat to public health safety, because the high disinfection antibacterial property of nano-silver product, it can be used to the disinfection of various public areas such as high-speed railway, subway, hospital etc. and can not let the germ produce the drug resistance, but nano-silver stability is poor usually, easily reunite difficult storage, long-term storage or use blacken easily, the sterilization virus killing effect is unsatisfactory, the particle size is inhomogeneous, and when using in public place, because the people flow constantly contacts or wipes the nano-silver on object surfaces such as floor, wall, the ageing of nano-silver more can reduce greatly.
Disclosure of Invention
The invention aims to provide a colloidal silver/polymer mixed disinfectant, a preparation method and an application thereof, wherein the colloidal silver/polymer mixed disinfectant can form a film layer when in use, protects and controls the slow release of silver, prolongs the effective sterilization time of the silver, does not generate a blackening phenomenon after long-time use, has no influence on public equipment, and can be widely applied to public health disinfection.
In order to solve the technical problems, the invention adopts the following technical scheme:
the colloidal silver/polymer mixed disinfectant is characterized by comprising a nano silver colloid and a water-soluble polymer, wherein the mass ratio of the nano silver colloid to the water-soluble polymer is (1-5.4): 1; wherein the concentration of the nano silver colloid is 10-100 ppm, and the solvent is a volatile polar solvent.
According to the scheme, the volatile polar solvent is deionized water, ammonia water, ethanol, propylene glycol or propylene glycol ether; the water-soluble polymer is acrylic resin, water-based polyurethane emulsion, alkyd resin, epoxy resin polyacrylamide, natural starch, xanthan gum, agar, CMC, HEC, HPC, cationic cellulose polymer, cationic guar gum, polyvinylpyrrolidone, phenolic resin, polyacrylamide, 00A0 polyaspartic acid or polyethylene glycol.
According to the scheme, the particle size of the nano silver in the nano silver colloid is 5-10 nm.
According to the scheme, the molecular weight of the water-soluble polymer is 600-60000.
The preparation method of the colloidal silver/polymer mixed disinfectant specifically comprises the following steps:
1) dissolving a silver compound in deionized water, and adding a surfactant and a reducing agent to obtain a precursor solution;
2) carrying out microwave reaction on the precursor solution obtained in the step 1), carrying out post-treatment after complete reaction to obtain a precipitate, and dispersing the precipitate in a volatile polar solvent to obtain a nano silver colloid, wherein the concentration of the nano silver colloid is 10-100 ppm;
3) uniformly mixing the nano silver colloid obtained in the step 2) with a water-soluble polymer to obtain the colloidal silver/polymer mixed disinfectant, wherein the mass ratio of the nano silver colloid to the water-soluble polymer is (1-5.4): 1.
According to the scheme, in the step 1), the mass ratio of the silver compound, the surfactant and the reducing agent in the precursor solution is 1: (2-40): (2-30), wherein the mass concentration of the silver compound in the deionized water is 0.05-10%.
According to the scheme, the silver compound in the step 1) is silver ammonia solution, silver nitrate or silver acetate; the reducing agent is sodium borohydride, hydrazine hydrate, ascorbic acid, sodium citrate or glucose; the surfactant is Cetyl Trimethyl Ammonium Bromide (CTAB) or Cetyl Trimethyl Ammonium Chloride (CTAC).
According to the scheme, the volatile polar solvent in the step 2) is deionized water, ammonia water, ethanol, propylene glycol or propylene glycol ether.
According to the scheme, the water-soluble polymer in the step 3) is acrylic resin, alkyd resin, alicyclic epoxy resin polyacrylamide, natural starch, xanthan gum, agar, CMC, HEC, HPC, cationic cellulose polymer, cationic guar gum, polyvinylpyrrolidone, phenolic resin, polyacrylamide, 00A0 polyaspartic acid or polyethylene glycol.
According to the scheme, the microwave reaction conditions in the step 2) are as follows: the microwave irradiation power is 300-850W, and the microwave action time is 20-200 s.
According to the scheme, the mixing temperature in the step 3) is 20-60 ℃.
The application of the colloidal silver/polymer mixed disinfectant in the field of public health disinfection is provided, the colloidal silver/polymer mixed disinfectant is atomized and sprayed onto the surface of a device to be disinfected, and a polar solution is volatilized to obtain a nano silver/polymer disinfection film layer for public health disinfection.
The invention has the beneficial effects that:
1. in the colloidal silver/polymer mixed disinfectant provided by the invention, the nano silver colloid is dispersed in the water-soluble polymer and is directly sprayed on a device to be disinfected when in use, the water-soluble polymer forms a film and uniformly wraps the nano silver in the film, so that the effect of protecting and controlling the release rate of the nano silver can be achieved, the silver concentration in the disinfectant is reduced under the condition of not influencing the appearance and the performance, the cost is minimized, the silver can be slowly released, the effective sterilization time of the silver is prolonged, the blackening phenomenon can not occur after long-time use, the public equipment is not influenced, and the colloidal silver/polymer mixed disinfectant can be widely applied to public health disinfection with large human flow.
2. In the preparation method, the nano silver colloid with the polar volatile solution as the solvent is physically mixed with the water-soluble polymer to obtain the colloidal silver/polymer mixed disinfectant, the preparation method is simple and efficient, the cost is low, the colloidal silver/polymer mixed disinfectant can be directly sprayed on a device to be disinfected when in use, the use is convenient, the effective disinfection time is long, no influence is caused on public equipment, and the colloidal silver/polymer mixed disinfectant can be widely applied to public health disinfection with large flow of people.
Detailed Description
The present invention will be described in detail with reference to the following examples.
Example 1
The preparation method of the colloidal silver/polymer mixed disinfectant specifically comprises the following steps:
a) weighing 0.05g of silver nitrate, adding the silver nitrate into 30g of deionized water to dilute the silver ion to 0.1%, uniformly stirring, and then adding 0.83g of hexadecyl trimethyl ammonium bromide and 0.67g of glucose for fully dissolving to obtain a precursor solution;
b) putting the precursor solution into a microwave generator, adjusting the microwave power to 400W, acting for 1min for 30s, taking out the reaction solution, centrifugally washing with deionized water, and dispersing the precipitate in 3000g of absolute ethyl alcohol to obtain nano silver colloid (the color is nearly colorless);
c) and uniformly stirring 10g of the obtained nano silver colloid and 3.57g of Byton BD-8401 water-soluble acrylic resin at the temperature of 45 ℃ to obtain the colloidal silver/polymer mixed disinfectant.
Atomizing and spraying colloidal silver/polymer mixed disinfectant on protected light color deviceThe surface of the article was left undisturbed for 10 days, and no change in the surface of the article was observed, as determined by concentration of 4.9X104The killing rate of CFU/ml Escherichia coli for 0.5h is 98.96%.
Example 2
The preparation method of the colloidal silver/polymer mixed disinfectant specifically comprises the following steps:
a) weighing 0.05g of silver nitrate, adding the silver nitrate into 7g of deionized water to dilute the silver ion to 0.4%, uniformly stirring, and then adding 0.64g of hexadecyl trimethyl ammonium bromide and 0.42g of glucose to fully dissolve to obtain a precursor solution;
b) putting the precursor solution into a microwave generator, adjusting the microwave power to 400W, acting for 1min for 30s, taking out the reaction solution, centrifugally washing with deionized water, and dispersing the precipitate in 2000g of absolute ethyl alcohol to obtain nano silver colloid (light yellow in color);
c) and uniformly stirring 10g of the obtained nano silver colloid and 2.5g of Byton BD-8401 water-soluble acrylic resin at the temperature of 50 ℃ to obtain the colloidal silver/polymer mixed disinfectant.
Atomizing and spraying the colloidal silver/polymer mixed disinfectant on the surface of a protected light-colored device, standing for 10 days without interference, and detecting that the surface of the object has no change and the concentration is 4.9x104The killing rate of CFU/ml Escherichia coli for 0.5h is 99.95%.
Example 3
The preparation method of the colloidal silver/polymer mixed disinfectant specifically comprises the following steps:
a) weighing 0.1g of silver nitrate, adding the silver nitrate into 7g of deionized water to dilute the silver ion to 0.8%, uniformly stirring, and then adding 0.5g of hexadecyl trimethyl ammonium bromide and 0.23g of glucose for fully dissolving to obtain a precursor solution;
b) putting the precursor solution into a microwave generator, adjusting the microwave power to be 500W, acting for 1min, taking out the reaction solution, centrifugally washing the reaction solution by using deionized water, and dispersing the precipitate into 2500g of absolute ethyl alcohol to obtain nano silver colloid (the color is light yellow);
c) and (3) uniformly stirring 10g of the obtained nano silver colloid and 10g of the aqueous polyurethane emulsion of the atacamite at the temperature of 50 ℃ to obtain the colloidal silver/polymer mixed disinfectant.
Atomizing and spraying the colloidal silver/polymer mixed disinfectant on the surface of a protected light-colored device, standing for 10 days without interference, and detecting that the surface of the object has no change and the concentration is 4.9x104The killing rate of CFU/ml Escherichia coli for 0.5h is 99.96%.
Example 4
The preparation method of the colloidal silver/polymer mixed disinfectant specifically comprises the following steps:
a) weighing 0.15g of silver nitrate, adding the silver nitrate into 7g of deionized water to dilute the silver ion concentration to 1.3%, uniformly stirring, and then adding 1.3g of hexadecyl trimethyl ammonium bromide and 0.89g of glucose for fully dissolving to obtain a precursor solution;
b) putting the precursor solution into a microwave generator, adjusting the microwave power to 700W, acting for 38s, taking out the reaction solution, centrifugally washing with deionized water, and dispersing the precipitate into 1500g of absolute ethyl alcohol to obtain nano silver colloid (light yellow in color);
c) and mixing 10g of the obtained nano silver colloid and 2.5g of aqueous polyurethane emulsion of the atacamite uniformly at the temperature of 50 ℃ to obtain the colloidal silver/polymer mixed disinfectant.
Atomizing and spraying the colloidal silver/polymer mixed disinfectant on the surface of a protected light-colored device, standing for 10 days without interference, and detecting that the surface of the object has no change and the concentration is 4.9x104The killing rate of CFU/ml Escherichia coli for 0.5h is 99.99%.
Example 5
The preparation method of the colloidal silver/polymer mixed disinfectant specifically comprises the following steps:
a) weighing 0.2g of silver nitrate, adding the silver nitrate into 7g of deionized water to dilute the silver ion concentration to 1.8%, uniformly stirring, and then adding 3.2g of hexadecyl trimethyl ammonium bromide and 1.3g of glucose to fully dissolve to obtain a precursor solution;
b) putting the precursor solution into a microwave generator, adjusting the microwave power to 700W, acting for 38s, taking out the reaction solution, centrifugally washing with deionized water, and dispersing the precipitate into 1500g of absolute ethyl alcohol to obtain nano silver colloid (light yellow in color);
c) and mixing 10g of the obtained nano silver colloid and 5.0g of aqueous polyurethane emulsion of the atacamite uniformly at the temperature of 50 ℃ to obtain the colloidal silver/polymer mixed disinfectant.
Atomizing and spraying the colloidal silver/polymer mixed disinfectant on the surface of a protected light-colored device, standing for 10 days without interference, and detecting that the surface of the object has no change and the concentration is 4.9x104The killing rate of CFU/ml Escherichia coli for 0.5h is 99.99%.
It is apparent that the above embodiments are only examples for clearly illustrating and do not limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are therefore intended to be included within the scope of the invention as claimed.
Claims (10)
1. The colloidal silver/polymer mixed disinfectant is characterized by comprising a nano silver colloid and a water-soluble polymer, wherein the mass ratio of the nano silver colloid to the water-soluble polymer is (1-5.4): 1; wherein the concentration of the nano silver colloid is 10-100 ppm, and the solvent is a volatile polar solvent.
2. The colloidal silver/polymer mixed disinfectant as claimed in claim 1, wherein the volatile polar solvent is deionized water, ammonia water, ethanol, propylene glycol or propylene glycol ether; the water-soluble polymer is acrylic resin, alkyd resin, alicyclic epoxy resin polyacrylamide, natural starch, xanthan gum, agar, CMC, HEC, HPC, cationic cellulose polymer, cationic guar gum, polyvinylpyrrolidone, phenolic resin, polyacrylamide, 00A0 polyaspartic acid or polyethylene glycol.
3. The mixed disinfectant of colloidal silver and polymer as claimed in claim 1, wherein the nano silver colloid has a nano silver particle size of 5-10 nm, and the water-soluble polymer has a molecular weight of 600-60000.
4. The method for preparing the colloidal silver/polymer mixed disinfectant as claimed in any one of claims 1 to 3, which comprises the following steps:
1) dissolving a silver compound in deionized water, and adding a surfactant and a reducing agent to obtain a precursor solution;
2) carrying out microwave reaction on the precursor solution obtained in the step 1), carrying out post-treatment after complete reaction to obtain a precipitate, and dispersing the precipitate in a volatile polar solvent to obtain a nano silver colloid, wherein the concentration of the nano silver colloid is 10-100 ppm;
3) uniformly mixing the nano silver colloid obtained in the step 2) with a water-soluble polymer to obtain the colloidal silver/polymer mixed disinfectant, wherein the mass ratio of the nano silver colloid to the water-soluble polymer is (1-5.4): 1.
5. The preparation method according to claim 4, wherein in the step 1), the mass ratio of the silver compound, the surfactant and the reducing agent in the precursor solution is 1: (2-40): (2-30), wherein the mass concentration of the silver compound in the deionized water is 0.05-10%.
6. The method according to claim 4, wherein the silver compound in step 1) is silver ammonia solution, silver nitrate or silver acetate; the reducing agent is sodium borohydride, hydrazine hydrate, ascorbic acid, sodium citrate or glucose; the surfactant is cetyl trimethyl ammonium bromide or cetyl trimethyl ammonium chloride.
7. The preparation method according to claim 4, wherein the volatile polar solvent in step 2) is deionized water, ammonia water, ethanol, propylene glycol or propylene glycol ether; the water-soluble polymer in the step 3) is acrylic resin, alkyd resin, alicyclic epoxy resin polyacrylamide, natural starch, xanthan gum, agar, CMC, HEC, HPC, cationic cellulose polymer, cationic guar gum, polyvinylpyrrolidone, phenolic resin, polyacrylamide, 00A0 polyaspartic acid or polyethylene glycol.
8. The preparation method according to claim 4, wherein the microwave reaction conditions in the step 2) are as follows: the microwave irradiation power is 300-850W, and the microwave action time is 20-200 s.
9. The method according to claim 4, wherein the mixing temperature in the step 3) is 20 to 60 ℃.
10. The application of the colloidal silver/polymer mixed disinfectant as claimed in any one of claims 1 to 3 in the field of public health disinfection, wherein the colloidal silver/polymer mixed disinfectant is atomized and sprayed onto the surface of a device to be disinfected, and a polar solution is volatilized to obtain a nano silver/polymer disinfection film layer for public health disinfection.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112868667A (en) * | 2021-02-04 | 2021-06-01 | 中国科学院上海硅酸盐研究所 | Instant preservative granules and preparation method thereof |
| CN113679620A (en) * | 2021-06-07 | 2021-11-23 | 广州市巨诚化工有限公司 | Antibacterial and antiseptic composition containing colloidal silver and preparation method thereof |
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