CN111567518A - Gel-like sodium hypochlorite disinfectant and preparation method and application thereof - Google Patents
Gel-like sodium hypochlorite disinfectant and preparation method and application thereof Download PDFInfo
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- CN111567518A CN111567518A CN202010461761.2A CN202010461761A CN111567518A CN 111567518 A CN111567518 A CN 111567518A CN 202010461761 A CN202010461761 A CN 202010461761A CN 111567518 A CN111567518 A CN 111567518A
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- sodium hypochlorite
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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
- A01N25/02—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 liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
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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
- A01N25/18—Vapour or smoke emitting compositions with delayed or sustained release
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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
Abstract
The invention provides a gelatinous sodium hypochlorite disinfectant and a preparation method and application thereof, wherein the gelatinous sodium hypochlorite disinfectant is obtained by soaking a mixed solution prepared from sodium alginate, sodium hypochlorite, ethylene glycol and water into a calcium ion solution, wherein the mixed solution prepared from the sodium alginate, the sodium hypochlorite, the ethylene glycol and the water comprises the following raw materials: 2-15 wt% of sodium alginate, 10-30 wt% of sodium hypochlorite, 5-60 wt% of ethylene glycol and the balance of water; the mass percentage concentration of the calcium ion solution is 2-60%. The disinfectant disclosed by the invention has higher stability, can realize the continuous, effective and slow release of effective chlorine, has a better air disinfection effect, and particularly has a better disinfection effect on suspended bacteria and/or viruses in the air. Moreover, the disinfectant of the invention has simple and convenient use method.
Description
Technical Field
The invention relates to the technical field of disinfectants, in particular to a gel-like sodium hypochlorite disinfectant and a preparation method and application thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Chlorine-containing disinfectants are a recognized and most widely used class of chemical disinfectants. Has the advantages of broad bactericidal spectrum, high efficiency, quick action, low toxicity, low price, convenient use and the like. At present, sodium hypochlorite is the most commonly used chlorine-containing disinfectant, and domestic 84 disinfectant takes sodium hypochlorite as a main effective component and plays a great role in daily life and serious epidemic situations (such as SARS and novel coronavirus epidemic situations).
Sodium hypochlorite is a strong oxidant and is easy to decompose, and the reaction rate is influenced by various factors such as environment, pH value, temperature, pH value, metal ions and the like. The current 84 disinfectant product is liquid, inconvenient and unstable in storage and transportation process, uncontrollable in effective chlorine release rate in use, and more importantly, the 84 disinfectant can only disinfect viruses settled on the surface of an object, but has poor effect on suspended bacteria and/or viruses suspended in the air for a long time. Common methods for air disinfection include spraying of disinfection solutions such as peracetic acid disinfection solutions, chlorine dioxide solutions, sodium hypochlorite solutions, etc., but the methods have too short disinfection time and low disinfection quality; the device also comprises modes of vinegar smoking, an ultraviolet lamp, an ozone disinfection machine and the like, but the modes are inconvenient to use, can achieve the disinfection effect in a short time, and has limited acting force on suspended bacteria and/or viruses which are detained in the air for a long time.
The gel has certain adsorption performance and is often used as an adsorbent, for example, for water treatment to realize adsorption and fixation of microorganisms so as to realize separation of the microorganisms from a water body.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a gel-like sodium hypochlorite disinfectant and a preparation method and application thereof.
Specifically, the technical scheme of the invention is as follows:
in a first aspect of the present invention, a gel-like sodium hypochlorite disinfectant is provided, which is obtained by immersing a mixed solution prepared from sodium alginate, sodium hypochlorite, ethylene glycol and water in a calcium ion solution, wherein the mixed solution prepared from sodium alginate, sodium hypochlorite, ethylene glycol and water comprises the following raw materials: 2-15 wt% of sodium alginate, 10-30 wt% of sodium hypochlorite, 5-60 wt% of ethylene glycol and the balance of water; the mass percentage concentration of the calcium ion solution is 2-60%. The sum of the percentage of the components of the raw materials is less than or equal to 100 percent.
Further, the mixed solution prepared from sodium alginate, sodium hypochlorite, ethylene glycol and water comprises the following raw materials: 3-10 wt% of sodium alginate, 10-25 wt% of sodium hypochlorite, 20-50 wt% of ethylene glycol and the balance of water; the sum of the percentage of each raw material component is 100 percent.
Wherein the calcium ion solution is a calcium chloride aqueous solution, and the mass percentage concentration of the calcium ion solution is 5-15%.
Since metal ions cause catalytic decomposition of sodium hypochlorite, the solvent water in the present invention is preferably deionized water.
Wherein the molecular weight range of the sodium alginate is 5-10 ten thousand, and the viscosity range is 0.3-25 Pa.s.
The disinfectant is a gel disinfectant, and the sodium hypochlorite is stored (fixed) in a grid structure rich in sodium alginate (or filled in gel pores of the sodium alginate), so that the influence degree of the sodium hypochlorite on environmental changes such as external temperature, humidity, pH and the like is reduced, and the stability of the sodium hypochlorite is greatly improved. The air (especially carbon dioxide) is contacted with the sodium hypochlorite stored in the gel structure and reacts through the mass transfer process of external diffusion, internal diffusion and surface diffusion by utilizing the gas-solid mass transfer principle, and the generated chlorine is released into the air in the reverse process of the process, so that the continuous and slow release process of the effective chlorine is realized, the continuous and effective disinfection effect can be realized, the air-gel type disinfection device is especially suitable for indoor disinfection, and especially has an obvious disinfection effect on indoor suspended bacteria and/or viruses. And the glycol is added into the disinfectant to be used as a humectant, so that the gel moisture state of the disinfectant can be effectively maintained, and the service life of the disinfectant is prolonged.
The relevant reactions involved in the contact of air with the gelatinous sodium hypochlorite disinfectant of the first aspect of the invention are as follows:
NaClO+H2O+CO2→HClO+NaHCO3
HClO→HCl+[O]
HClO+HCl→Cl2+H2O
on one hand, carbon dioxide enters the gel and reacts with sodium hypochlorite to generate hypochlorous acid, the hypochlorous acid is further decomposed to generate nascent oxygen [ O ] with extremely strong oxidizability, and the hypochlorous acid and the [ O ] can kill bacteria and/or viruses settled on the gel; on the other hand, the generated chlorine gas is released into the air controllably and slowly and reacts with the moisture in the air to generate hypochlorous acid, so that the bacteria and/or viruses in the air can be killed and killed for a long time.
In a second aspect of the present invention, there is provided a method for producing the gel-like sodium hypochlorite disinfectant as described in the first aspect above, comprising: and (3) pouring a mixed solution of sodium hypochlorite, sodium alginate and glycol into the template, immersing the template into a calcium chloride solution, reacting to obtain hydrogel, taking out the template, and washing to obtain the hydrogel.
In the embodiment of the invention, the method comprises the steps of uniformly mixing ethylene glycol and deionized water, dividing the deionized water solution of the ethylene glycol into two parts for preparing a sodium alginate solution and a sodium hypochlorite solution respectively, adding the sodium alginate into the deionized water solution of the first part of the ethylene glycol, stirring at 80-85 ℃ until the sodium alginate solution is dissolved, and cooling to room temperature to obtain the sodium alginate solution for later use; adding sodium hypochlorite into the deionized water solution of the second part of glycol to be completely dissolved to obtain a sodium hypochlorite solution; uniformly mixing the prepared sodium alginate solution and sodium hypochlorite solution to obtain a mixed solution of sodium hypochlorite, sodium alginate and glycol; dissolving calcium chloride in deionized water to prepare a calcium chloride solution; and (3) pouring the prepared mixed solution of sodium hypochlorite, sodium alginate and glycol into a template, immersing the template into a calcium chloride solution, reacting to obtain hydrogel, taking out the template, and washing to obtain the hydrogel.
In the method, the template is immersed into the calcium chloride solution from top to bottom and smoothly enters the calcium chloride solution.
In an embodiment of the present invention, the reaction temperature is 20 to 35 ℃ and the reaction time is 2 to 12 hours. In some embodiments, the reaction temperature is 20-25 ℃ and the reaction time is 4-8 h.
In the embodiment of the invention, after the reaction is finished, the template is taken out, the hydrogel is separated from the template, and the hydrogel is rapidly washed by deionized water until the concentration of calcium ions in the washing residual liquid is less than 5 per thousand.
In the embodiment of the invention, if the reaction temperature is too high, for example, higher than 35 ℃, the decomposition speed of sodium hypochlorite is accelerated, which causes great loss of available chlorine in the preparation process, and the reaction temperature is preferably 20-25 ℃. Along with the prolonging of the reaction time, the gel network is more complete, the time is too short, the gel reaction is incomplete, and the abundant and stable-structure network cannot be formed, so that the storage and controllable release of the sodium hypochlorite are influenced.
In the embodiment of the invention, the gel-like sodium hypochlorite disinfectant is packaged and stored.
In the embodiment of the invention, the operation of dissolving sodium alginate in the glycol deionized water solution and then uniformly mixing the sodium alginate with the sodium hypochlorite solution completely dissolved in the glycol deionized water solution is more favorable for maintaining the stability of the sodium hypochlorite and the uniform dispersion of the sodium hypochlorite in the gel disinfectant (the sodium hypochlorite can be better and uniformly fixed in a grid structure formed by the sodium alginate), so that the release of effective chlorine is more uniform and controllable during use.
The term "packaging" as used in the method of the present invention means that the gel-like sodium hypochlorite disinfectant is separated from the environment, thereby achieving the effect of isolating the gel-like sodium hypochlorite disinfectant from the air, and therefore, the packaging method that can achieve the effect without affecting the stability of the gel-like sodium hypochlorite disinfectant is acceptable, for example, the gel-like sodium hypochlorite disinfectant is poured into a container capable of sealing a pouring opening; such as placing it in a container having an opening, and then closing the opening with a packaging film, etc. Moreover, the encapsulation can realize the effect of avoiding light.
In a third aspect of the present invention, there is provided a disinfection system, comprising the gel-like sodium hypochlorite disinfectant of the first aspect, an inner case for containing the disinfectant, a packaging film for enclosing the disinfectant in the inner case, and an outer cover capable of being hermetically fastened to the inner case; wherein the inner box is provided with an opening, and the packaging film covers the opening of the inner box; the outer cover is provided with a plurality of holes.
In the embodiment of the invention, the disinfectant can be a block gel or a spherical gel, and the inner box containing the disinfectant can be selected according to the shape of the disinfectant; the block gel or the spherical gel can be contained in the same box or in different boxes in multiple blocks or multiple pieces.
In a fourth aspect of the invention, there is provided the use of a sterilising agent as described in the first aspect above or a sterilising system as described in the third aspect above in the field of air sterilisation; in particular, the object of air disinfection is bacteria and/or viruses suspended in the room.
Preferably, the application environment of the disinfectant or disinfection system is: the indoor temperature is 18-35 deg.C, and the indoor humidity is preferably 50-80%. In embodiments of the invention, water spraying may be used when the humidity is insufficient (e.g., to create sufficient moisture using a humidifier or other moisture generating device).
In a fifth aspect of the present invention, there is provided a method of disinfecting bacteria and/or viruses suspended in a chamber, comprising placing a disinfectant as described in the first aspect above in the chamber, and contacting the disinfectant with the air in the chamber;
alternatively, the sterilization system of the third aspect is placed in a room, and the sealing film on the inner case is removed to allow the sterilizing agent to contact the room air through the hole in the outer cover.
The disinfectant can realize the controllable slow release of chlorine after contacting with air.
Preferably, the indoor temperature is 18-35 ℃ and the indoor humidity is 50-80%. In embodiments of the invention, water spraying may be used when the humidity is insufficient (e.g., to create sufficient moisture using a humidifier or other moisture generating device).
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
different from the prior art which adopts the technology of gel fixation or capture or natural sedimentation and further sterilization and the technology of spraying sodium hypochlorite to sterilize bacteria and/or viruses, the gel-like disinfectant can ensure the stability of the sodium hypochlorite, uniformly fix the sodium hypochlorite in a gel network structure formed by the sodium alginate, generate chlorine after the air is contacted with the gel and is contacted with the sodium hypochlorite through the gas-solid mass transfer process, further continuously, effectively and controllably release the chlorine into the air through the reverse process of the process, and generate effective chlorine by being contacted with moisture in humid air so as to realize better air disinfection effect, and particularly has better sterilization effect on suspended bacteria and/or viruses in the air. Moreover, the disinfectant disclosed by the invention is simple and convenient to use, long in disinfection effect maintaining time, capable of realizing long-term and continuous effective disinfection effect, beneficial to popularization and use and beneficial to popularization and use.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out according to conventional conditions or according to conditions recommended by the manufacturers.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The reagents or starting materials used in the present invention can be purchased from conventional sources, and unless otherwise specified, the reagents or starting materials used in the present invention can be used in a conventional manner in the art or in accordance with the product specifications. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention. The preferred embodiments and materials described herein are intended to be exemplary only.
Example 1
Preparing a sodium alginate solution and a sodium hypochlorite mixed solution, wherein the mass percent of the sodium alginate is 5 percent, and the mass percent of the sodium hypochlorite is 15 percent.
The specific configuration method comprises the following steps: weighing 5g of sodium alginate (with the molecular weight of 7 ten thousand and the viscosity of 15Pa.s), 15g of sodium hypochlorite, 20g of ethylene glycol and 60g of deionized water, uniformly mixing the ethylene glycol and the deionized water, adding the sodium alginate into a deionized water solution of 60g of ethylene glycol, stirring and dissolving at 85 ℃, and cooling to room temperature for later use. 15g of sodium hypochlorite was added to the remaining 20g of ethylene glycol aqueous solution to completely dissolve. The sodium alginate solution and the sodium hypochlorite solution were mixed uniformly and designated as solution A. And preparing a calcium chloride solution with the mass percentage concentration of 15 percent, and recording the solution as a solution B. Pouring the solution A into a mold with the diameter of 6 cm, slowly and stably sinking the mold into the solution B, controlling the reaction temperature to be 20 ℃ and the reaction time to be 12 h. And after the reaction, pouring the gel out of the mold, moving the gel to a spraying area, and quickly spraying and cleaning the gel by using deionized water. And packing the gel product in a box to form an inner box part. The surface of the cover of the outer box is provided with uniform gas volatilization holes. When in use, the sealing film of the inner box is removed, and the outer cover is covered.
The test was carried out in a room of about 20 cubic meters (test time > 30 days), room temperature 25 ℃ and humidity 55%. The sodium hypochlorite gel box is placed on a middle table of a room, and the sterilization effect of the available chlorine and indoor staphylococcus aureus is tested at regular time. And (3) placing the sampler at a height of 1.0m indoors to sample the air in the room, placing all sampling flat plates in an incubator at 37 ℃ for culturing for 48h, and calculating a killing logarithm value. The calculation method was in accordance with the regulations in the Disinfection technical Specification (2002) edition. According to the judgment standard of the disinfection technical specification (2002), the disinfection pass is determined when the killing log value of each test is more than or equal to 3.
The test results are shown in table 1.
TABLE 1
Example 2
Preparing a sodium alginate solution and a sodium hypochlorite mixed solution, wherein the mass percent of the sodium alginate is 10%, and the mass percent of the sodium hypochlorite is 25%.
The specific configuration method comprises the following steps: weighing 10g of sodium alginate (molecular weight is 7 ten thousand, viscosity is 23Pa.s, same as example 1), 25g of sodium hypochlorite, 20g of ethylene glycol and 45g of deionized water, uniformly mixing the ethylene glycol and the deionized water, adding the sodium alginate into a deionized water solution of 50g of ethylene glycol, stirring at 85 ℃ to dissolve the sodium alginate, and cooling to room temperature for later use. 15g of sodium hypochlorite was added to the remaining 15g of ethylene glycol aqueous solution to completely dissolve. The sodium alginate solution and the sodium hypochlorite solution were mixed uniformly and designated as solution A. And preparing a calcium chloride solution with the mass percentage concentration of 15 percent, and recording the solution as a solution B. Pouring the solution A into a mold with the diameter of 6 cm, slowly and stably sinking the mold into the solution B, controlling the reaction temperature to be 20 ℃ and the reaction time to be 12 h. And after the reaction, pouring the gel out of the mold, moving the gel to a spraying area, and quickly spraying and cleaning the gel by using deionized water. And packing the gel product in a box to form an inner box part. The surface of the cover of the outer box is provided with uniform gas volatilization holes. When in use, the sealing film of the inner box is removed, and the outer cover is covered.
The test was carried out in a room of about 20 cubic meters (test time > 30 days), room temperature 25 ℃ and humidity 55%. The sodium hypochlorite gel box is placed on a middle table of a room, and the sterilization effect of the available chlorine and indoor staphylococcus aureus is tested at regular time. The test method was the same as in example 1, and the test results are shown in Table 2.
TABLE 2
| 1 day | 2 days | 4 days | 8 days | 15 days | 30 days | 32 days | 35 days | |
| Appearance of the product | Moistening | Moistening | Moistening | Moistening | Moistening | Moistening | Moistening | Moistening |
| Smell(s) | Has chlorine smell | Has chlorine smell | Has chlorine smell | With chlorineTaste of Chinese herbs | Has chlorine smell | Has chlorine smell | Has chlorine smell | Has chlorine smell |
| Available chlorine (mg/L) | ～300 | ～300 | ～300 | ～300 | ～300 | ～300 | ～200 | - |
| Killing logarithm value | >3 | >3 | >3 | >3 | >3 | >3 | >2 | - |
Example 3
The only difference compared to the preparation method of example 1 is that no ethylene glycol was added during the formulation.
The disinfectant prepared was tested in a room of about 20 cubic meters (test time > 30 days) at room temperature 25 ℃ and humidity 55%. The box filled with the disinfectant is placed on a middle table of a room, and the sterilization effect of the available chlorine and indoor staphylococcus aureus is tested at regular time. The test method was the same as in example 1.
The test results are shown in table 3.
TABLE 3
| 1 day | 2 days | 4 days | 8 days | 15 days | 30 days | |
| Appearance of the product | Moistening | Moistening | Crack by desiccation | Crack by desiccation | Crack by desiccation | Crack by desiccation |
| Smell(s) | Has chlorine smell | Has chlorine smell | Has chlorine smell | Has no chlorine smell | Has no chlorine smell | Has no chlorine smell |
| Available chlorine (mg/L) | ～300 | ～300 | - | - | - | - |
| Killing logarithm value | >3 | >3 | ＜3 | - | - | - |
Comparative example
The comparative example provides a commercially available 84 disinfectant, having the following properties and components: light yellow liquid, the main component is sodium hypochlorite. Diluting according to the proportion of 1:1000, sterilizing a room for 5min by using spraying equipment, then testing the sterilizing effect of indoor staphylococcus aureus at regular time, sampling, culturing, detecting and analyzing, calculating a sterilization logarithm value according to the method of example 1, and detecting that the sterilization logarithm value is more than 3 immediately after the spraying sterilization is finished; sampling again, culturing, detecting and analyzing after 6 hours, wherein the sterilization log value is more than 3; after 1 day, sampling again, culturing, detecting and analyzing, and sterilizing the product with a log value of < 3.
Sterilizing a room for 15min by using spraying equipment by adopting the same method as the method, then testing the sterilizing effect of indoor staphylococcus aureus at regular time, sampling, culturing, detecting and analyzing, calculating a sterilization logarithm value according to the method of the embodiment 1, and detecting that the sterilization logarithm value is more than 3 immediately after the spraying sterilization is finished; sampling again, culturing, detecting and analyzing after 6 hours, wherein the sterilization log value is more than 3; after 1 day, sampling again, culturing, detecting and analyzing, and sterilizing the product with a log value of < 3.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A gel-like sodium hypochlorite disinfectant is prepared by soaking a mixed solution prepared from sodium alginate, sodium hypochlorite, ethylene glycol and water in a calcium ion solution, wherein the mixed solution prepared from the sodium alginate, the sodium hypochlorite, the ethylene glycol and the water comprises the following raw materials: 2-15 wt% of sodium alginate, 10-30 wt% of sodium hypochlorite, 5-60 wt% of ethylene glycol and the balance of water; the mass percentage concentration of the calcium ion solution is 2-60%.
2. The sodium hypochlorite disinfectant in gel form according to claim 1, wherein the mixed solution prepared from sodium alginate, sodium hypochlorite, ethylene glycol and water comprises the following raw materials: 3-10 wt% of sodium alginate, 10-25 wt% of sodium hypochlorite, 20-50 wt% of ethylene glycol and the balance of water;
preferably, the calcium ion solution is a calcium chloride aqueous solution, and the mass percentage concentration of the calcium ion solution is 5-15%.
3. A method of preparing the gelatinous sodium hypochlorite disinfectant of claim 1 or 2, comprising: and (3) pouring a mixed solution of sodium hypochlorite, sodium alginate and glycol into the template, immersing the template into the calcium ion solution, reacting to obtain hydrogel, taking out the template, and washing to obtain the hydrogel.
4. The method as claimed in claim 3, wherein the method comprises mixing ethylene glycol and deionized water uniformly, then dividing the deionized water solution of ethylene glycol into two parts to prepare sodium alginate solution and sodium hypochlorite solution respectively, adding sodium alginate into the deionized water solution of the first part of ethylene glycol, stirring at 80-85 ℃ until the sodium alginate solution is dissolved, and cooling to room temperature to obtain sodium alginate solution for later use; adding sodium hypochlorite into the deionized water solution of the second part of glycol to be completely dissolved to obtain a sodium hypochlorite solution; uniformly mixing a sodium alginate solution and a sodium hypochlorite solution to obtain a mixed solution of sodium hypochlorite, sodium alginate and glycol; dissolving calcium chloride in deionized water to prepare a calcium chloride solution; and (3) pouring a mixed solution of sodium hypochlorite, sodium alginate and glycol into the template, immersing the template into a calcium chloride solution, reacting to obtain hydrogel, taking out the template, and washing to obtain the hydrogel.
5. The method according to claim 3 or 4, wherein the template is immersed in the calcium chloride solution in a top-down manner and smoothly enters;
preferably, the reaction temperature is 20-35 ℃, and the reaction time is 2-12 hours;
preferably, the reaction temperature is 20-25 ℃, and the reaction time is 4-8 h;
preferably, after the reaction is finished, taking out the template, separating the hydrogel from the template, and washing the hydrogel by using deionized water until the concentration of calcium ions in the washing residual liquid is less than 5 per thousand.
6. The method according to claim 3 or 4, wherein the gel-like sodium hypochlorite disinfectant is packaged for storage.
7. A disinfection system, which comprises the gel-like sodium hypochlorite disinfectant as claimed in claim 1 or 2, an inner box for containing the disinfectant, a packaging film for enclosing the disinfectant in the inner box, and an outer cover capable of being hermetically buckled with the inner box; wherein the inner box is provided with an opening, and the packaging film covers the opening of the inner box; the outer cover is provided with a plurality of holes.
8. Use of a disinfectant according to claim 1 or 2 or a disinfection system according to claim 7 in the field of air disinfection;
preferably, the object of air disinfection is indoor suspended bacteria and/or viruses.
9. A method of disinfecting suspended bacteria and/or viruses in a room, comprising placing the disinfectant of claim 1 or 2 in the room, contacting the disinfectant with the air in the room;
alternatively, the sterilization system of claim 7 is placed in a room, and the sealing film on the inner case is removed to allow the sterilizing agent to contact the room air through the hole in the outer cover.
10. The method of claim 9 wherein the chlorine release is effected after the disinfectant has contacted the air.
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| CN113893670A (en) * | 2021-10-28 | 2022-01-07 | 大庆中环评价检测有限公司 | Non-toxic indoor long-acting disinfection gel product |
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