Environment-responsive chlorine dioxide air purifying agent and preparation method thereof

Abstract

The invention discloses an environmental response type chlorine dioxide air purifying agent which is prepared from the following raw materials: sodium chlorite, anhydrous disodium hydrogen phosphate, monopotassium phosphate, water, a 30% hydrogen peroxide solution, a color indicator, a seasoning freshener solution and a carrier. The preparation method comprises the following steps: S1, dissolving sodium chlorite, anhydrous sodium dihydrogen phosphate and monopotassium phosphate in water to obtain a solution A; s2, adding a 30% hydrogen peroxide solution into the solution A to obtain a solution B; s3, adding a color indicator and a seasoning freshener solution into the solution B to obtain a solution C, and aging; s4, putting a carrier into the solution C, and adsorbing the carrier; and S5, taking out the carrier, and pre-freezing and drying the carrier in a freezing dryer to obtain the chlorine dioxide air purifying agent component. And S6, adding the color-changeable water-absorbing silica gel beads, and dispersing and mixing uniformly to obtain the color-changeable water-absorbing silica gel The prepared purifying agent is stable in chlorine dioxide release amount, easy to use, safe, harmless and wide in application range.

Description

Technical Field

[0001] The invention belongs to the field of daily chemicals, and in particular relates to an environment-responsive chlorine dioxide air purifier and a preparation method thereof. Background Art

[0002] As my country's urban and rural construction has gradually deepened its economic achievements, people's requirements for the quality of home life and office environment have also grown rapidly. The adhesives and topcoats used in decoration and new furniture lead to the release of a small amount of volatile organic solvents in the room; and the moldy odors emitted by the bathroom and wardrobes used for a long time in a hot and humid environment seriously affect people's quality of life. Some harmful gases, such as formaldehyde, xylene and other TVOC, have been identified as the triggers of many common cancers. Various molds that are easy to breed on walls, toilets, refrigerators, wardrobes and food storage areas are easy to cause discomfort in the home, flies and insects breed, and are more likely to cause food corruption and property losses.

[0003] To this end, for indoor home air purification, technicians have launched a number of products that can be used for air purification, such as activated carbon and diatomaceous earth, which work mainly through adsorption; photocatalyst nano-titanium dioxide, which work through catalytic decomposition; and ozone and chlorine dioxide, which decompose harmful substances by chemical oxidation and kill pathogenic microorganisms.

[0004] Among these chemical disinfection products used for disinfection, sterilization, and degradation of harmful substances, chlorine dioxide is a common and effective substance. According to the relevant provisions of the national occupational health and safety standards, the concentration of gaseous chlorine dioxide (≤0.3mg / m 3 ), it can effectively kill most pathogenic bacteria such as Staphylococcus aureus, Staphylococcus albus, Escherichia coli, hepatitis B virus and Aspergillus flavus, with a killing rate of more than 99% within 30 minutes. For formaldehyde in the home environment, chlorine dioxide can decompose the formaldehyde concentration in the room from 0.12ppm to 0.01ppm within 24 hours at the same concentration, and the treatment efficiency exceeds 90%. By further increasing the application concentration in an unmanned environment, the effects of air purification, formaldehyde removal, and sterilization can be quickly achieved. In addition, through the slow-release technology of chlorine dioxide, the indoor concentration can continue to stay ≤0.01mg / m 3 The concentration of chlorine dioxide gas can further inhibit the growth of mold and odor. There is no residue of disinfection products and no secondary pollution. It is an excellent indoor air environment purification technology.

[0005] At present, the common chlorine dioxide air purification technology on the market is to activate chlorite to produce chlorine dioxide and release it into the air, and use fumigation and slow-release gel to release chlorine dioxide gas into the air for air purification and disinfection. Similar products are gradually becoming mainstream in the market, but such products have obvious shortcomings.

[0006] First of all, regarding the fumigation method, most of these products can only be used in unmanned environments, and can quickly reduce the concentration of indoor pollutants such as formaldehyde and TVOC to a very low value, so that it can temporarily meet the indoor pollutant standards. However, since pollutants often come from deep inside large home panels and adhesives and topcoats in wall and floor seams, a one-time construction alone cannot fundamentally solve the problem of formaldehyde and other gas release. Toxic and harmful gases will rebound quickly under high temperature and high humidity conditions, and still pose a certain threat to human life and health.

[0007] For air purification products such as chlorine dioxide gel and jelly, although their release can always be maintained at a stable state in a stable environment, the release environment changes suddenly, just like the temperature changes dramatically with the temperature difference between day and night. When the temperature rises rapidly, the gel will lose water rapidly due to the increase in evaporation, resulting in a significant increase in the release rate of chlorine dioxide, resulting in a "explosive release" phenomenon. The oxidation, bleaching and corrosiveness of chlorine dioxide will be significantly enhanced, causing it to deviate from the design expectations and cause damage. On the contrary, if the temperature drops, the release of the gel will decrease, resulting in a "stop release" phenomenon, resulting in a weakening of the efficacy. Second, when the humidity changes with special climate changes such as "return of the south wind" and "plum rain", the moisture of the product itself will evaporate, causing a large amount of chlorine dioxide to dissolve in the water vapor generated by itself or the dewdrops of environmental moisture, continuously corroding metal parts that are prone to condensation of dew, such as screws, hinges, window frames, etc., resulting in property losses. Finally, gel products also have many inconveniences during use. For example, most products need to be mixed with activators or gel powder before use. Once unsealed, there is no way to pause their release. You also need to be careful about pouring and leaking when using them to prevent secondary pollution. Summary of the invention

[0008] The object of the present invention is to provide an environmentally responsive chlorine dioxide air purifier and a preparation method thereof, so as to solve the technical problems existing in the above-mentioned prior art.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An environmentally responsive chlorine dioxide air purifier is prepared from the following raw materials: 50-100 g of sodium chlorite, 20-40 g of anhydrous disodium hydrogen phosphate, 7-12 g of potassium dihydrogen phosphate, 750-1200 mL of water, 5-9 mL of 30% hydrogen peroxide solution, 30-50 mL of a color indicator, 10-20 mL of a flavoring freshener solution, and 100-145 g of a carrier.

[0011] Furthermore, the color indicator is ferrophenanthroline.

[0012] Furthermore, the flavoring and refreshing agent solution is made of the following raw materials: 0.5-4g of menthol, 8-15g of a low boiling point solvent, and auxiliary flavors, with the amount being 15-25% of the mass of the menthol.

[0013] Furthermore, the low boiling point solvent is one of ethanol, ethylene glycol, propylene glycol or methyl ethyl ether.

[0014] Furthermore, the auxiliary flavor is one or more of citral, α-terpineol, α-terpinene, geraniol, limonene, bornyl acetate, linalool acetate, citronellal, and the like.

[0015] Furthermore, the carrier is an organic polymer water-absorbing resin.

[0016] Furthermore, the carrier is a spherical polyacrylic acid water-absorbing resin with a diameter of 3.5 to 4.0 mm.

[0017] A method for preparing an environmentally responsive chlorine dioxide air purifier comprises the following steps:

[0018] S1: Dissolve sodium chlorite, anhydrous sodium dihydrogen phosphate and potassium dihydrogen phosphate in water, and stir evenly under normal temperature and humidity until completely dissolved to obtain solution A;

[0019] S2: Add 30% hydrogen peroxide solution to solution A and stir for 15 to 30 minutes to obtain solution B;

[0020] S3: Add a color indicator and a flavoring freshener solution to solution B, stir evenly until the solution is clear and transparent, to obtain solution C, and store solution C in an environment of <30°C, sealed and aged for 4 hours;

[0021] S4: putting the carrier into solution C, allowing the carrier to absorb and swell in the reaction container, and the adsorption time is 12 to 18 hours;

[0022] S5: taking out the saturated adsorbed carrier, draining the solution on the surface, and placing it in a cold dryer for pre-freezing and drying to obtain a chlorine dioxide air purifier component;

[0023] S6: Add color-changing water-absorbing silica gel balls with a diameter of 1.5 to 3.5 mm at a ratio of 10 to 15% of the total mass of the chlorine dioxide air purifier components, so that the chlorine dioxide air purifier components and the color-changing water-absorbing silica gel balls are evenly dispersed and mixed to obtain an environmentally responsive chlorine dioxide air purifier, which is then packaged in different fixed containers according to application scenarios.

[0024] Furthermore, in step S1, the concentration of solution A is 10-14%, and the pH value is 5.5-6.5.

[0025] Furthermore, in step S5, pre-freezing and drying are performed at -30 to -20°C and 30 to 100 Pa for 18 to 28 hours.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention can more effectively utilize the environment by adsorbing the chlorine dioxide gas generating system onto a carrier and activating it by absorbing moisture in the air, thereby reducing the substances used for stabilizing the main chlorine dioxide as much as possible, reducing the consumption of raw materials, and the release amount of chlorine dioxide gas is stable, steady and appropriate, and it is not easy to have "explosive release" and "stop release" phenomena.

[0028] 2. The present invention adopts acrylic polymer water-absorbing resin as a carrier, which has excellent water absorption and water retention capabilities. It is easy to absorb moisture in the air and re-endow the inorganic salt combination aqueous solution atmosphere of the internally adsorbed chlorine dioxide stable solution until it starts to react. At the same time, it has good chemical stability and is not easily rapidly degraded due to the generation and accumulation of chlorine dioxide.

[0029] 3. The present invention can adjust the appearance and smell of the product by adding a color indicator and a flavoring freshener; the color indicator can give the carrier some beautiful colors, making it more like a daily necessity, and it is not easy to fade due to the generation of chlorine dioxide. The color can be retained for a long time; the flavoring freshener can make the product emit a more pleasant smell, offset part of the irritation caused by chlorine dioxide to sensitive people, and make the product safer.

[0030] 4. The present invention does not contain water-containing systems such as hydrogels that are easy to increase humidity, and is not easy to form high humidity areas in closed or semi-closed spaces, thereby preventing the generated chlorine dioxide and hydrochloric acid gas from combining with moisture in the air to cause obvious corrosion and bleaching damage to metals, fabrics, leather, etc.

[0031] 5. The main components of the present invention are in a single package and can be used immediately after unsealing. When using the product, the user only needs to open the package without the need for additional weighing, configuration, stirring, etc., and can put it into use. The operation is simple and easy to use. Moreover, all the contents of the product are in solid state, which is not only small in size, convenient for transportation and storage, but also has no risk of tipping and leakage, and does not need to be placed on a flat bottom or platform, which greatly optimizes the user experience.

[0032] 6. The present invention prepares a stable solid packaging form, usually in small units, which can be placed in multiple application scenarios and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a curve diagram of chlorine dioxide gas release in one application cycle of Example 1 of the present invention;

[0034] Figure 2 This is a curve diagram of chlorine dioxide gas release in one application cycle of Comparative Example 1 of the present invention;

[0035] Figure 3 This is a graph showing the release of chlorine dioxide gas in one application cycle of Comparative Example 2 of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling the reader to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0037] An environmentally responsive chlorine dioxide air purifier is prepared from the following raw materials: 50-100 g of sodium chlorite, 20-40 g of anhydrous disodium hydrogen phosphate, 7-12 g of potassium dihydrogen phosphate, 750-1200 mL of water, 5-9 mL of 30% hydrogen peroxide solution, 30-50 mL of a color indicator, 10-20 mL of a flavoring freshener solution, and 100-145 g of a carrier.

[0038] The activation of chlorine dioxide slow-release materials requires a reaction in the solution medium. When activation is required, the system can obtain water from the environment at an appropriate rate, which can effectively regulate the generation of chlorine dioxide. The chlorine dioxide generation system is loaded onto the carrier by adsorption, usually by pre-preparing a chlorine dioxide stabilizing solution, i.e., a solution of chlorite-pH buffer component-stabilizing component-auxiliary agent; sodium chlorite is used as chlorite; the pH buffer component is a conjugate acid-base pair of disodium hydrogen phosphate-potassium dihydrogen phosphate, and the three are usually controlled together as variables for pH regulation; 30% hydrogen peroxide solution is used as a stabilizing component, and hydrogen peroxide solutions of different concentrations can also be used, but the amount added should be adjusted year-on-year.

[0039] Additives are used to improve the appearance and smell of the product. For the appearance, ferrous o-phenanthroline, methylene blue, etc. can be used. These redox color indicators in an oxidized state can give the carrier some beautiful colors, making the product more like a daily necessity. Moreover, this type of color indicator is not easy to fade due to the production of chlorine dioxide, and the color can be retained for a long time.

[0040] For the smell, flavoring fresheners can be used so that the product can emit a more pleasant smell and offset the slight irritation caused by chlorine dioxide to extremely sensitive people. Flavoring fresheners are usually terpene flavors such as dextromenthol and rose oil. Such substances have stable chemical properties, are not easily oxidized and decomposed, and have a pleasant fragrance. Menthol has good effects whether it is used to cover the source of odor in life or to cover the irritating smell of chlorine dioxide. However, due to the low solubility of menthol, it is difficult to quickly dissolve and disperse in aqueous solution. It should be pre-dissolved in low-boiling organic solvents such as ethanol, ethylene glycol, and propylene glycol; at the same time, since menthol has a certain irritation to the respiratory tract, auxiliary flavors need to be added to improve the irritation of menthol. One or a mixture of citral, α-terpineol, α-terpinene, geraniol, limonene, borneol acetate, linalool acetate, citronellal, etc. as auxiliary flavors can better reconcile its irritation and make it appear relatively soft.

[0041] In the prior art, porous inorganic materials are mostly used as carriers, such as molecular sieves, zeolites, diatomaceous earth, etc. However, the adsorption capacity of inorganic materials on inorganic salts is far less than that of organic water-absorbing resins, and it is difficult to dehydrate carriers such as molecular sieves. The small amount of water remaining in the material can easily make the internal reaction of the adsorbent unable to stop, resulting in poor stability. It is also easy to crack when drying, affecting the appearance and affecting production. In terms of automatic activation, organic polymer water-absorbing resins have excellent water absorption and water retention capabilities. They can easily absorb moisture in the air and re-endow the internally adsorbed chlorine dioxide stable solution with an inorganic salt combination aqueous solution atmosphere until it starts to react. Acrylic resins also have good chemical stability and are not easily rapidly degraded due to the generation and accumulation of chlorine dioxide, so they can be used as good carriers.

[0042] A method for preparing an environmentally responsive chlorine dioxide air purifier comprises the following steps:

[0043] S1: dissolving sodium chlorite, anhydrous sodium dihydrogen phosphate and potassium dihydrogen phosphate in water, and stirring evenly until completely dissolved under normal temperature and humidity to obtain solution A. The concentration of solution A is 10-14%, and the pH value is 5.5-6.5. At this concentration and pH value, it is beneficial to reduce the time used for dehydration, reduce energy consumption during product production, and improve efficiency;

[0044] S2: Add 30% hydrogen peroxide solution to solution A and stir for 15 to 30 minutes to obtain solution B;

[0045] S3: Add a color indicator and a flavoring freshener solution to solution B, stir evenly until the solution is clear and transparent, to obtain solution C, and store solution C in an environment of <30°C, sealed and aged for 4 hours;

[0046] S4: putting the carrier into solution C, allowing the carrier to absorb and swell in the reaction container, and the adsorption time is 12 to 18 hours;

[0047] S5: taking out the saturated adsorbed carrier, draining the solution on the surface, and placing it in a cold dryer for pre-freezing and drying at -30 to -20°C and 30 to 100 Pa for 18 to 28 hours to obtain a chlorine dioxide air purifier component;

[0048] S6: Add color-changing water-absorbing silica gel balls with a diameter of 1.5 to 3.5 mm at a ratio of 10 to 15% of the total mass of the chlorine dioxide air purifier components, so that the chlorine dioxide air purifier components and the color-changing water-absorbing silica gel balls are evenly dispersed and mixed to obtain an environmentally responsive chlorine dioxide air purifier, which is then packaged in different fixed containers according to application scenarios.

[0049] When unsealed, the completely dry water-absorbing beads begin to come into contact with moisture in the air. After the moisture is absorbed into the water-absorbing resin beads, it is re-given a channel for the chlorine dioxide stable solution to start the activation reaction. At this time, chlorine dioxide gas is generated by acidification of chlorite and begins to be released to the outside world, thereby gradually purifying, killing and suppressing mold and odor in the space through the sterilization and oxidation of chlorine dioxide and the seasoning and odor-masking effects of fresheners and auxiliary flavors. If there is airflow in the space, the purification effect can be further optimized.

[0050] The following is a more specific example.

[0051] Example 1

[0052] An environmentally responsive chlorine dioxide air purifier is prepared from the following raw materials: 100 g of sodium chlorite, 30 g of anhydrous disodium hydrogen phosphate, 10 g of potassium dihydrogen phosphate, 1200 mL of water, 5 mL of 30% hydrogen peroxide solution, 30 mL of o-phenanthroline ferrous color indicator, 10 mL of flavoring freshener solution, and 125 g of a spherical polyacrylic acid polymer water-absorbing resin carrier with a diameter of 3.5 mm.

[0053] The flavoring freshener solution is prepared from the following raw materials: 0.5 g of menthol, 12 g of ethanol and citral, with the amount of citral being 20% ​​of the mass of the menthol.

[0054] A method for preparing an environmentally responsive chlorine dioxide air purifier comprises the following steps:

[0055] S1: dissolving sodium chlorite, anhydrous sodium dihydrogen phosphate and potassium dihydrogen phosphate in water, and stirring evenly at room temperature and humidity until completely dissolved to obtain solution A, wherein the concentration of solution A is 13% and the pH value is 6;

[0056] S2: Add 30% hydrogen peroxide solution to solution A and stir for 20 minutes to obtain solution B;

[0057] S3: Add a color indicator and a flavoring freshener solution to solution B, stir evenly until the solution is clear and transparent, to obtain solution C, and store solution C in an environment of <30°C, sealed and aged for 4 hours;

[0058] S4: putting the carrier into solution C, allowing the carrier to absorb and swell in the reaction container, and the adsorption time is 12 hours;

[0059] S5: taking out the saturated adsorbed carrier, draining the solution on the surface, and placing it in a cold dryer for pre-freezing and drying at -25°C and 80Pa for 18 hours to obtain a chlorine dioxide air purifier component;

[0060] S6: Add 3.5mm diameter color-changing water-absorbing silica gel balls at a ratio of 15% of the total mass of the chlorine dioxide air purifier components, so that the chlorine dioxide air purifier components and the color-changing water-absorbing silica gel balls are evenly dispersed and mixed to obtain an environmentally responsive chlorine dioxide air purifier, which can be packaged in different fixed containers according to the application scenarios.

[0061] Example 2

[0062] The invention discloses an environment-responsive chlorine dioxide air purifier, which is prepared from the following raw materials: 80 g of sodium chlorite, 20 g of anhydrous disodium hydrogen phosphate, 8 g of potassium dihydrogen phosphate, 1100 mL of water, 6 mL of a 30% hydrogen peroxide solution, 40 mL of a ferrous iodide color indicator, 15 mL of a flavoring freshener solution, and 100 g of a spherical polyacrylic acid polymer water-absorbing resin carrier with a diameter of 4.0 mm.

[0063] The flavoring and refreshing agent solution is prepared from the following raw materials: 1g of menthol, 10g of ethylene glycol, and alpha-pineneol, with the amount thereof being 25% of the mass of the menthol.

[0064] A method for preparing an environmentally responsive chlorine dioxide air purifier comprises the following steps:

[0065] S1: dissolving sodium chlorite, anhydrous sodium dihydrogen phosphate and potassium dihydrogen phosphate in water, and stirring evenly until completely dissolved under normal temperature and humidity to obtain solution A, wherein the concentration of solution A is 10% and the pH value is 6.0;

[0066] S2: Add 30% hydrogen peroxide solution to solution A and stir for 15 minutes to obtain solution B;

[0067] S3: Add a color indicator and a flavoring freshener solution to solution B, stir evenly until the solution is clear and transparent, to obtain solution C, and store solution C in an environment of <30°C, sealed and aged for 4 hours;

[0068] S4: putting the carrier into solution C, allowing the carrier to absorb and swell in the reaction container, and the adsorption time is 15 hours;

[0069] S5: taking out the saturated adsorbed carrier, draining the solution on the surface, and placing it in a cold dryer for pre-freezing and drying at -30°C and 50Pa for 20 hours to obtain a chlorine dioxide air purifier component;

[0070] S6: Add 1.5mm diameter color-changing water-absorbing silica gel balls at a ratio of 12% of the total mass of the chlorine dioxide air purifier components, so that the chlorine dioxide air purifier components and the color-changing water-absorbing silica gel balls are evenly dispersed and mixed to obtain an environmentally responsive chlorine dioxide air purifier, which can be packaged in different fixed containers according to the application scenarios.

[0071] Example 3

[0072] An environmentally responsive chlorine dioxide air purifier is prepared from the following raw materials: 60 g of sodium chlorite, 25 g of anhydrous disodium hydrogen phosphate, 7 g of potassium dihydrogen phosphate, 750 mL of water, 9 mL of a 30% hydrogen peroxide solution, 30 mL of a ferrous iodide color indicator, 20 mL of a flavoring freshener solution, and 135 g of a spherical polyacrylic acid polymer water-absorbing resin carrier with a diameter of 3.5 mm.

[0073] The flavoring freshener solution comprises the following raw materials: 4g of menthol, 8g of propylene glycol, and a mixture of alpha-terpinene, limonene and bornyl acetate, with the amount thereof being 15% of the mass of the menthol.

[0074] A method for preparing an environmentally responsive chlorine dioxide air purifier comprises the following steps:

[0075] S1: dissolving sodium chlorite, anhydrous sodium dihydrogen phosphate and potassium dihydrogen phosphate in water, and stirring evenly at room temperature and humidity until completely dissolved to obtain solution A, wherein the concentration of solution A is 14% and the pH value is 5.5;

[0076] S2: Add 30% hydrogen peroxide solution to solution A and stir for 30 minutes to obtain solution B;

[0077] S3: Add a color indicator and a flavoring freshener solution to solution B, stir evenly until the solution is clear and transparent, to obtain solution C, and store solution C in an environment of <30°C, sealed and aged for 4 hours;

[0078] S4: putting the carrier into solution C, allowing the carrier to absorb and swell in the reaction container, and the adsorption time is 16 hours;

[0079] S5: taking out the saturated adsorbed carrier, draining the solution on the surface, and placing it in a cold dryer for pre-freezing and drying at -28°C and 30Pa for 28 hours to obtain a chlorine dioxide air purifier component;

[0080] S6: Add 2mm diameter color-changing water-absorbing silica gel balls at a ratio of 10% of the total mass of the chlorine dioxide air purifier components, so that the chlorine dioxide air purifier components and the color-changing water-absorbing silica gel balls are evenly dispersed and mixed to obtain an environmentally responsive chlorine dioxide air purifier, which can be packaged in different fixed containers according to the application scenarios.

[0081] Example 4

[0082] The invention discloses an environment-responsive chlorine dioxide air purifier, which is prepared from the following raw materials: 50 g of sodium chlorite, 40 g of anhydrous disodium hydrogen phosphate, 12 g of potassium dihydrogen phosphate, 1000 mL of water, 8 mL of a 30% hydrogen peroxide solution, 50 mL of a ferrous iodide color indicator, 12 mL of a flavoring freshener solution, and 145 g of a spherical polyacrylic acid polymer water-absorbing resin carrier with a diameter of 4.0 mm.

[0083] The flavoring freshener solution comprises the following raw materials: 2g of menthol, 15g of methyl ethyl ether, a mixture of alpha-terpineol, geraniol, linalool acetate and citronellal, with the dosage being 22% of the mass of the menthol.

[0084] A method for preparing an environmentally responsive chlorine dioxide air purifier comprises the following steps:

[0085] S1: dissolving sodium chlorite, anhydrous sodium dihydrogen phosphate and potassium dihydrogen phosphate in water, and stirring evenly at room temperature and humidity until completely dissolved to obtain solution A, wherein the concentration of solution A is 10% and the pH value is 6.5;

[0086] S2: Add 30% hydrogen peroxide solution to solution A and stir for 25 minutes to obtain solution B;

[0087] S3: Add a color indicator and a flavoring freshener solution to solution B, stir evenly until the solution is clear and transparent, to obtain solution C, and store solution C in an environment of <30°C, sealed and aged for 4 hours;

[0088] S4: putting the carrier into solution C, allowing the carrier to absorb and swell in the reaction container for 18 hours;

[0089] S5: taking out the saturated adsorbed carrier, draining the solution on the surface, and placing it in a cold dryer for pre-freezing and drying at -20°C and 100Pa for 20 hours to obtain a chlorine dioxide air purifier component;

[0090] S6: Add 3mm diameter color-changing water-absorbing silica gel balls at a ratio of 14% of the total mass of the chlorine dioxide air purifier components, so that the chlorine dioxide air purifier components and the color-changing water-absorbing silica gel balls are evenly dispersed and mixed to obtain an environmentally responsive chlorine dioxide air purifier, which is then packaged in different fixed containers according to the application scenarios.

[0091] Comparative Example 1

[0092] It is basically the same as Example 1, except that the carrier in the raw material of the purifier is a molecular sieve.

[0093] Comparative Example 2

[0094] It is basically the same as Example 1, except that in the preparation method of the purifier, step S5 is dried by thermal drying, that is, the saturated adsorbed carrier is taken out, the solution on the surface is drained, and dried in an oven at 35°C for 18 hours.

[0095] 1. Release amount experiment

[0096] The chlorine dioxide release of the purifiers prepared in Example 1 and Comparative Examples 1-2 was tested within an application period (14 days), and the data was recorded and a curve graph was drawn, as shown in FIG. Figure 1-3 shown.

[0097] from Figure 1 It can be seen that the purifier prepared in Example 1 has a short burst release of chlorine dioxide gas, and the maximum value of chlorine dioxide gas release reaches 0.39ppm, and then the release amount slowly decreases to below 0.07ppm, and then tends to balance. It can be seen that the purifier prepared by the present invention has a stable, stable and appropriate chlorine dioxide release amount, and is not prone to "burst release" and "stop release" phenomena.

[0098] from Figure 2 It can be seen that the purifier prepared in Comparative Example 1 releases a trace amount of chlorine dioxide gas, with the highest value reaching 0.02ppm, and the product fails after 3 days.

[0099] This is because the use of molecular sieve-type porous inorganic material carriers has too little adsorption of inorganic salts, resulting in insufficient chlorine dioxide generation system, which in turn causes the release of chlorine dioxide gas to be too low, and the air purification effect cannot be achieved.

[0100] from Figure 3 It can be seen that the purifier prepared in Comparative Example 2 has a strong and explosive release of chlorine dioxide gas, with the maximum value of chlorine dioxide gas reaching 0.87ppm, and then the release amount decreases, and the product fails after 3 days.

[0101] This is because: under the heating state, the chlorine dioxide reaction system is activated faster due to the accelerated thermal motion of molecules, and the purifier immediately releases chlorine dioxide gas. In this case, the original chlorine dioxide component content in the system decreases, and the self-activation effect cannot be achieved, so the release amount decreases with time, and the product fails after 3 days.

[0102] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An environmentally responsive chlorine dioxide air purifier, characterized in that: The invention is prepared from the following raw materials: 50-100 g of sodium chlorite, 20-40 g of anhydrous disodium hydrogen phosphate, 7-12 g of potassium dihydrogen phosphate, 750-1200 mL of water, 5-9 mL of a 30% hydrogen peroxide solution, 30-50 mL of a color indicator, 10-20 mL of a flavoring freshener solution and 100-145 g of a carrier.

2. An environmentally responsive chlorine dioxide air purifier according to claim 1, characterized in that: The color indicator is o-phenanthroline ferrous oxide.

3. An environmentally responsive chlorine dioxide air purifier according to claim 1, characterized in that: The flavoring freshener solution is prepared from the following raw materials: 0.5-4g of menthol, 8-15g of a low boiling point solvent, and auxiliary flavor, the amount of which is 15-25% of the mass of the menthol.

4. An environmentally responsive chlorine dioxide air purifier according to claim 3, characterized in that: The low boiling point solvent is one of ethanol, ethylene glycol, propylene glycol or methyl ethyl ether.

5. An environmentally responsive chlorine dioxide air purifier according to claim 4, characterized in that: The auxiliary flavor is one or more of citral, α-terpineol, α-terpinene, geraniol, limonene, bornyl acetate, linalool acetate, citronellal, and the like.

6. The environmentally responsive chlorine dioxide air purifier according to claim 1, characterized in that: The carrier is an organic high molecular water-absorbing resin.

7. An environmentally responsive chlorine dioxide air purifier according to claim 6, characterized in that: The carrier is a spherical polyacrylic acid water-absorbing resin with a diameter of 3.5 to 4.0 mm.

8. A method for preparing an environmentally responsive chlorine dioxide air purifier according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Dissolve sodium chlorite, anhydrous sodium dihydrogen phosphate and potassium dihydrogen phosphate in water, and stir evenly under normal temperature and humidity until completely dissolved to obtain solution A; S2: Add 30% hydrogen peroxide solution to solution A and stir for 15 to 30 minutes to obtain solution B; S3: Add a color indicator and a flavoring freshener solution to solution B, stir evenly until the solution is clear and transparent, to obtain solution C, and store solution C in an environment of <30°C, sealed and aged for 4 hours; S4: putting the carrier into solution C, allowing the carrier to absorb and swell in the reaction container, and the adsorption time is 12 to 18 hours; S5: taking out the saturated adsorbed carrier, draining the solution on the surface, and placing it in a cold dryer for pre-freezing and drying to obtain a chlorine dioxide air purifier component; S6: Add color-changing water-absorbing silica gel balls with a diameter of 1.5 to 3.5 mm at a ratio of 10 to 15% of the total mass of the chlorine dioxide air purifier components, so that the chlorine dioxide air purifier components and the color-changing water-absorbing silica gel balls are evenly dispersed and mixed to obtain an environmentally responsive chlorine dioxide air purifier, which is then packaged in different fixed containers according to application scenarios.

9. The method for preparing an environmentally responsive chlorine dioxide air purifier according to claim 8, characterized in that: In step S1, the concentration of solution A is 10-14%, and the pH value is 5.5-6.

5.

10. The method for preparing an environmentally responsive chlorine dioxide air purifier according to claim 8, characterized in that: In the step S5, pre-freezing and drying are performed at -30 to -20°C and 30 to 100 Pa for 18 to 28 hours.

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