CN112210092A - Preparation method of sodium chlorite hydrogel - Google Patents
Preparation method of sodium chlorite hydrogel Download PDFInfo
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- CN112210092A CN112210092A CN202011193572.8A CN202011193572A CN112210092A CN 112210092 A CN112210092 A CN 112210092A CN 202011193572 A CN202011193572 A CN 202011193572A CN 112210092 A CN112210092 A CN 112210092A
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- 239000000017 hydrogel Substances 0.000 title claims abstract description 57
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 title claims abstract description 56
- 229960002218 sodium chlorite Drugs 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000243 solution Substances 0.000 claims abstract description 28
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000000499 gel Substances 0.000 claims abstract description 15
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims abstract description 12
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims abstract description 12
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000007864 aqueous solution Substances 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 238000007334 copolymerization reaction Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 18
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 8
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 8
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 8
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 239000012190 activator Substances 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 34
- 239000004155 Chlorine dioxide Substances 0.000 description 17
- 235000019398 chlorine dioxide Nutrition 0.000 description 17
- 239000007789 gas Substances 0.000 description 11
- 238000002834 transmittance Methods 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000645 desinfectant Substances 0.000 description 4
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 206010043275 Teratogenicity Diseases 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100001081 no carcinogenicity Toxicity 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004076 pulp bleaching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 231100000211 teratogenicity Toxicity 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/20—Gaseous substances, e.g. vapours
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/24—Homopolymers or copolymers of amides or imides
- C08J2333/26—Homopolymers or copolymers of acrylamide or methacrylamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/324—Alkali metal phosphate
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Abstract
The invention discloses a preparation method of a sodium chlorite hydrogel, which comprises the following steps: s1, preparation of hydrogel solution: preparing an acrylamide aqueous solution with the concentration of 3-5 mol/L; s2, graft copolymerization: adding potassium persulfate and N, N-methylene-bisacrylamide to the obtained acrylamide aqueous solution at the temperature of 10-30 ℃ while stirring for mixed reaction, and stirring for 30-40min, wherein the mass ratio of acrylamide to potassium persulfate to N, N-methylene-bisacrylamide is (300-) -400): 1: (1.7-2); s3, formation of sodium chlorite hydrogel: and heating the reacted solution at 50-70 ℃ for 0.5-1.5 hours to obtain hydrogel, drying the hydrogel, putting the dried hydrogel into a sodium chlorite solution, and waiting for the gel to absorb and swell in a light-tight environment to form the sodium chlorite hydrogel. The preparation method provided by the invention is convenient to operate and simple to produce, and the prepared sodium chlorite hydrogel is highly transparent, strong in adsorption capacity and oxidation resistance and has a good absorption effect on ultraviolet light.
Description
Technical Field
The invention belongs to the technical field of space disinfection, and particularly relates to a preparation method of a sodium chlorite hydrogel.
Background
The chlorine dioxide has strong oxidizing power, and compared with the traditional liquid chlorine, the chlorine dioxide has strong sterilizing power, can not generate chlorophenol with strange odor with phenols in water, and can not react with humus to form carcinogenic substances. In the late 80 s of the last century, chlorine dioxide has received acceptance by the United States Department of Agriculture (USDA) and the united states Environmental Protection Agency (EPA) as a food disinfectant and a disinfectant for drinking water. The World Health Organization (WHO) confirms that the substance has no carcinogenicity and teratogenicity, has multiple functions of disinfection, sterilization, corrosion prevention, deodorization, fresh keeping, bleaching and the like, is a broad-spectrum, safe and efficient disinfectant, and is advocated as a fourth-generation disinfectant and also widely applied to the fields of paper pulp bleaching, food processing, medicine and health and the like.
However, chlorine dioxide gas is unstable, inconvenient to transport and store, and must be prepared on-site. A typical chemical method is to produce chlorine dioxide gas by reacting chloride with acid, but the chemical reaction occurs rapidly and the generation of chlorine dioxide gas at high concentration in a short time causes harm to human or animals. Although patent documents report that gel or adsorption type solid preparations are used for achieving long-acting slow release of chlorine dioxide in space, experiments prove that the concentration of chlorine dioxide gas specified by national standards is difficult to achieve, the release speed of the chlorine dioxide gas cannot be controlled so as to solve the problem of quantitative release of the chlorine dioxide gas, the operation process is complex, the wide application of the chlorine dioxide is hindered, and inconvenience is brought to users.
As chlorite is known to decompose under ultraviolet light to produce chlorine dioxide gas, prior studies have shown that chlorine dioxide gas can also be produced by irradiating sodium chlorite particles or sodium chlorite gel with ultraviolet light. However, the sodium chlorite hydrogel obtained by the traditional method has low transparency, and the application of the sodium chlorite hydrogel is limited.
Disclosure of Invention
Aiming at the problems, the invention researches and designs a preparation method of sodium chlorite hydrogel to solve the defect of low transparency of the sodium chlorite hydrogel obtained by the traditional method. The technical means adopted by the invention are as follows:
a preparation method of a sodium chlorite hydrogel comprises the following preparation steps:
s1, preparation of hydrogel solution: preparing an acrylamide aqueous solution with the concentration of 3-5 mol/L;
s2, graft copolymerization: adding potassium persulfate and N, N-methylene-bisacrylamide into the obtained acrylamide aqueous solution at room temperature while stirring for mixed reaction, and stirring for 30-40min, wherein the mass ratio of acrylamide to potassium persulfate to N, N-methylene-bisacrylamide is (300-) -400): 1: (1.7-2);
s3, formation of highly transparent sodium chlorite hydrogel: heating the uniformly reacted solution at 50-70 ℃ for 0.5-1.5 hours to obtain hydrogel, drying the hydrogel, putting the dried hydrogel into a sodium chlorite solution, and waiting for the gel to absorb and swell in a dark place (namely under the environment without ultraviolet irradiation) to form the sodium chlorite hydrogel.
Preferably, in step S2, the stirring speed is 300-500 r/min.
Preferably, in step S3, the drying temperature is 100-120 ℃.
Preferably, in step S3, the sodium chlorite solution has a mass concentration of 10 to 30%.
Preferably, in step S3, the sodium chlorite solution contains an activator.
Preferably, the activator is one or more of sodium dihydrogen phosphate, oxalic acid, citric acid, tartaric acid and hydrogen chlorite.
Preferably, the activating agent is sodium dihydrogen phosphate, and the mass ratio of the sodium chlorite to the sodium dihydrogen phosphate is (145-) -436): 1.
compared with the prior art, the preparation method of the sodium chlorite hydrogel has the following beneficial effects: the sodium chlorite hydrogel prepared by the method has the advantages of high transparency, strong adsorption capacity, strong oxidation resistance, safe and convenient use and the like, has a good absorption effect on ultraviolet light with the wavelength of less than 350nm, can be efficiently decomposed to prepare chlorine dioxide gas under the irradiation of the ultraviolet light, has oxidation resistance stability and light stability, and cannot cause the problem of aging cracking under the irradiation of the ultraviolet light. By controlling the light source irradiating the sodium chlorite hydrogel, the control of the release speed of the chlorine dioxide gas can be realized, the gel can be used for a long time, and the problems of acidification, uncontrollable release, storage and transportation, inconvenient use and the like of the chlorine dioxide products in the current market can be solved.
Drawings
FIG. 1 shows the transmittance of the sodium chlorite hydrogel obtained in example 1 of the present invention measured by UV-Vis spectrophotometry at a wavelength range of 300-800 nm.
FIG. 2 is a graph showing the transmittance of the sodium chlorite hydrogel obtained in example 2 of the present invention measured by UV-Vis spectrophotometry at a wavelength range of 300-800 nm.
FIG. 3 shows the transmittance of the sodium chlorite hydrogel obtained in example 3 of the present invention measured by UV-Vis spectrophotometry at a wavelength range of 300-800 nm.
Detailed Description
Example 1:
s1, preparation of hydrogel solution:
a certain amount of acrylamide was poured into a beaker, and 120 ml of distilled water was added to prepare an aqueous acrylamide solution having a concentration of 3 to 5 mol/L.
S2, graft copolymerization:
stirring at room temperature at the rotating speed of 300r/min by using a stirrer, adding potassium persulfate and N, N-methylene-bisacrylamide while stirring for mixing reaction, and stirring for 30 min; wherein the mass ratio of the acrylamide to the potassium persulfate to the N, N-methylene-bisacrylamide is 400:1: 2.
S3, formation of highly transparent sodium chlorite hydrogel:
pouring the solution with uniform reaction into a mould, and heating in a water bath kettle at 50 ℃ for 1 hour to obtain the high-transparency hydrogel. Then the gel is put into a 110 ℃ oven for drying, and then the gel is put into a sodium chlorite solution containing an activating agent sodium dihydrogen phosphate, wherein the mass concentration of the sodium chlorite solution is 30 percent, and the mass ratio of the sodium chlorite to the sodium dihydrogen phosphate is (145-: 1, waiting for the gel to absorb and swell in a dark place to form the highly transparent sodium chlorite hydrogel.
Example 2:
s1, preparation of hydrogel solution:
a certain amount of acrylamide was poured into a beaker, and 150 ml of distilled water was added to prepare an aqueous acrylamide solution having a concentration of 3 to 5 mol/L.
S2, graft copolymerization:
stirring at room temperature at the rotating speed of 300r/min by using a stirrer, adding potassium persulfate and N, N-methylene-bisacrylamide while stirring for mixing reaction, and stirring for 40 min; wherein the mass ratio of the acrylamide to the potassium persulfate to the N, N-methylene-bisacrylamide is 330:1: 1.8.
S3, formation of highly transparent sodium chlorite hydrogel:
pouring the solution with uniform reaction into a mould, and heating in a water bath kettle at 60 ℃ for 1.5 hours to obtain the high-transparency hydrogel. And then putting the gel into a 110 ℃ oven for drying, then putting the gel into a sodium chlorite solution, wherein the mass concentration of the sodium chlorite solution is 20%, and waiting for the gel to absorb and swell in a dark place to form the high-transparency sodium chlorite hydrogel.
Example 3:
s1, preparation of hydrogel solution:
a certain amount of acrylamide was poured into a beaker, and 150 ml of distilled water was added to prepare an aqueous acrylamide solution having a concentration of 3 to 5 mol/L.
S2, graft copolymerization:
stirring at room temperature at the rotating speed of 300r/min by using a stirrer, adding potassium persulfate and N, N-methylene-bisacrylamide while stirring for mixing reaction, and stirring for 40 min; wherein the mass ratio of the acrylamide to the potassium persulfate to the N, N-methylene-bisacrylamide is 300:1: 1.7.
S3, formation of highly transparent sodium chlorite hydrogel:
pouring the solution with uniform reaction into a mould, and heating in a water bath kettle at 70 ℃ for 0.5-1 hour to obtain the high-transparency hydrogel. And then putting the gel into a 110 ℃ oven for drying, putting the gel into a sodium chlorite solution with the mass concentration of 10%, and waiting for the gel to absorb and swell in a dark place to form the high-transparency sodium chlorite hydrogel.
FIGS. 1-3 show the results of UV-Vis spectrophotometry of the sodium chlorite hydrogels prepared in examples 1-3, and the light transmittance of the substances was measured in the wavelength range of 300-800 nm. When light passes through a substance to be measured, the degree of absorption of light by the substance varies depending on the wavelength of the light. Therefore, the absorption spectrum of the measured substance is obtained by measuring the light transmittance of the substance at different wavelengths and drawing a relation graph of the light transmittance and the wavelengths.
When the incident light intensity I0At a certain time, the medium absorbs the intensity of light IaThe greater the intensity of transmitted light ItThe smaller. By means of It/I0Representing the ability of light to pass through the medium, called light transmittance, denoted by T, i.e. T ═ It/I0. The light transmittance is a percentage and ranges from 0 to 100 percent. If the light is totally absorbed by the medium ItT is 0. And if the light is totally transmitted, then It＝I0For example, a light transmittance of 90% means that 90% of light can be transmitted by the substance. As can be seen from the figure, the obtained sodium chlorite hydrogel is in the visible light range of 400-760nmThe sodium chlorite hydrogel has good transparency, has poor transparency to ultraviolet light with the wavelength of less than 400nm, and particularly has nearly zero transmittance to ultraviolet light with the wavelength of less than 350nm, which shows that the absorption effect to the ultraviolet light is very good at the moment, and the obtained sodium chlorite hydrogel can be used for generating chlorine dioxide gas under the irradiation of the ultraviolet light with the wavelength of less than 350 nm.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (7)
1. A method for preparing a sodium chlorite hydrogel is characterized by comprising the following steps: the method comprises the following steps:
s1, preparation of hydrogel solution: preparing an acrylamide aqueous solution with the concentration of 3-5 mol/L;
s2, graft copolymerization: adding potassium persulfate and N, N-methylene-bisacrylamide to the obtained acrylamide aqueous solution at the temperature of 10-30 ℃ while stirring for mixed reaction, and stirring for 30-40min, wherein the mass ratio of acrylamide to potassium persulfate to N, N-methylene-bisacrylamide is (300-) -400): 1: (1.7-2);
s3, formation of sodium chlorite hydrogel: and heating the reacted solution at 50-70 ℃ for 0.5-1.5 hours to obtain hydrogel, drying the hydrogel, putting the dried hydrogel into a sodium chlorite solution, and waiting for the gel to absorb and swell in a light-tight environment to form the sodium chlorite hydrogel.
2. The method for preparing a sodium chlorite hydrogel according to claim 1, wherein the method comprises the following steps: in step S2, the stirring speed is 300-500 r/min.
3. The method for preparing a sodium chlorite hydrogel according to claim 1, wherein the method comprises the following steps: in step S3, the drying temperature is 100-120 ℃.
4. The method for preparing a sodium chlorite hydrogel according to claim 1, wherein the method comprises the following steps: in step S3, the mass concentration of the sodium chlorite solution is 10-30%.
5. The method for preparing a sodium chlorite hydrogel according to claim 1, wherein the method comprises the following steps: in step S3, the sodium chlorite solution contains an activator.
6. The method for preparing a sodium chlorite hydrogel according to claim 5, wherein: the activator is one or more of sodium dihydrogen phosphate, oxalic acid, citric acid, tartaric acid and hydrogen chlorite.
7. The method for preparing a sodium chlorite hydrogel according to claim 6, wherein the method comprises the following steps: the activating agent is sodium dihydrogen phosphate, and the mass ratio of the sodium chlorite to the sodium dihydrogen phosphate is (145-: 1.
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| CN116217795A (en) * | 2023-02-21 | 2023-06-06 | 台州市黄岩鸿瀚工贸有限公司 | Gel for sterilizing and disinfecting air, removing aldehyde and removing peculiar smell and preparation method thereof |
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