Durable formaldehyde-removing and odor-removing antibacterial composition as well as preparation method and application thereof
Through the wrapping technology of citrus essential oil, lemon essential oil and nano manganese oxide combination with chitosan and polyvinylamine, combined with silver ion solution, the long-lasting effect of formaldehyde removal, odor cleansing and antibacterial in the air is achieved, and the effects in the existing technology are solved A single and short period problem.
Patent Information
- Application Number
- CN202411822180.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-02-11
AI Technical Summary
The prior art is difficult to achieve long-term effects of formaldehyde removal, odor cleansing and antibacterial at the same time, and the continuous indoor pollutants cannot be purified for a long time at once.
The combination of citrus essential oil, lemon essential oil and nanomanganese oxide is used as aldehyde removal and odor removal actives, and the sustained release of the actives is achieved through the encapsulation technology of chitosan and polyvinylamine. At the same time, silver ion solution is added to enhance the bactericidal effect.
It achieves long-lasting aldehyde removal, odor cleansing and antibacterial effects in the air, with a long-lasting effect and a high killing rate and long-lasting antibacterial ability for common pathogenic bacteria.
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Figure CN119406187A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of new materials, and in particular to a long-lasting formaldehyde-removing and odor-removing antibacterial composition and a preparation method and application thereof. Background Art
[0002] The sources of indoor gas pollution are not only formaldehyde, but also various odorous gases and microorganisms. At present, the products used in the market have a single function, such as removing formaldehyde, removing odor or sterilizing. If you want to achieve these three functions at the same time, you need to use multiple products together. Moreover, the effect cycle is short, and it is impossible to achieve long-term purification of indoor pollutants in one go. Summary of the invention
[0003] One of the purposes of the embodiments of the present invention is to provide a long-lasting formaldehyde-removing, odor-removing and antibacterial composition and a preparation method thereof. The long-lasting formaldehyde-removing, odor-removing and antibacterial composition of the present invention has excellent formaldehyde-removing, odor-removing and antibacterial effects on the air, and the effect is long-lasting.
[0004] The second purpose of the embodiment of the present invention is to provide a long-lasting formaldehyde-removing and odor-removing antibacterial composition for use in air purification.
[0005] To achieve this object, the present invention adopts the following technical solutions:
[0006] In one aspect, a long-lasting formaldehyde-removing and odor-removing antibacterial composition is provided, comprising the following components in parts by weight:
[0007]
[0008]
[0009] The present invention uses citrus essential oil, lemon essential oil and nano manganese oxide as active substances for removing formaldehyde and odor, which can volatilize phenols, negative ions or free radicals for a long time to purify fresh air, and uses chitosan and polyvinylamine as wrapping wall materials to wrap and slowly release the active substances for removing formaldehyde and odor, so that the active substances are more long-lastingly released, thereby achieving a long-lasting purification effect. Active groups such as amino groups or hydroxyl groups in the wrapping wall materials can also undergo polymerization reactions with pollutant molecules such as formaldehyde or nonenal, thereby achieving an efficient odor purification effect. At the same time, the silver ion solution enables the product to have a bactericidal effect at the same time, and the killing rate of common pathogens such as Escherichia coli, Staphylococcus aureus and Candida albicans is as high as 99.9% or more, and the long-lasting antibacterial 72h bactericidal rate is greater than 95%.
[0010] Furthermore, the particle size of the nano manganese oxide is 3.0-10.0 nm.
[0011] Furthermore, the silver ion solution consists of a silver thiosulfate solution and a sodium thiosulfate solution, wherein the mass ratio of sodium thiosulfate to silver thiosulfate in the silver ion solution is 9:1.
[0012] Furthermore, the silver content in the silver thiosulfate solution is 10-20 g / L.
[0013] Furthermore, the preservative is selected from at least one of phenoxyethanol, p-hydroxyacetophenone, caprylyl glycol, and ethylhexylglycerin, preferably phenoxyethanol.
[0014] Furthermore, the emulsifier is selected from at least one of Tween 20, Span 80, PEG-40 hydrogenated castor oil, and polyglycerol-10 myristate, preferably Tween 20.
[0015] On the other hand, a method for preparing the persistent formaldehyde-removing and odor-removing antibacterial composition is provided, comprising the following steps:
[0016] (1) Add 0.5-5.0 parts of citrus essential oil, 0.5-5.0 parts of lemon essential oil and 0.1-0.2 parts of nano manganese oxide to 1.0-5.0 parts of preservatives by weight, stir and disperse evenly to prepare an oil phase solution;
[0017] (2) adding 1.0-5.0 parts of chitosan, 0.5-1.0 parts of lactic acid and 0.5-1.5 parts of polyvinylamine into water and stirring evenly under heating to prepare an aqueous solution;
[0018] (3) adding the aqueous phase solution to 0.2-1.0 parts of an emulsifier for primary emulsification, and then adding the aqueous phase solution to the oil phase solution for re-emulsification to obtain a formaldehyde-removing and odor-removing microcapsule emulsion;
[0019] (4) Add 1.0-5.0 parts of silver ion solution and 0.1-0.5 parts of nano zinc oxide to the formaldehyde-removing and odor-removing microcapsule emulsion for complexation treatment to obtain a long-lasting formaldehyde-removing and odor-removing antibacterial composition.
[0020] The present invention selects citrus essential oil, lemon essential oil and nano manganese oxide formaldehyde removal and odor removal active substances, which can volatilize phenols, anions or free radicals for a long time to purify fresh air, and packages and slowly releases them, so that the active substances are slowly released for a longer time, thereby achieving a long-lasting purification effect.
[0021] The present invention selects chitosan and polyvinylamine as encapsulation technical wall materials, which can not only encapsulate citrus essential oil, lemon essential oil and nano manganese oxide, but also the active groups in their molecules such as amino or hydroxyl groups can undergo polymerization reaction with pollutant molecules such as formaldehyde or nonenal, thereby achieving a highly efficient odor purification effect.
[0022] The microcapsule emulsion for preparing formaldehyde removal and odor removal of the present invention also modifies complexed silver ions, so that the product has a bactericidal effect at the same time. The killing rate of common pathogens, such as Escherichia coli, Staphylococcus aureus and Candida albicans, is as high as more than 99.9%, and the lasting antibacterial killing rate for 72 hours is greater than 95%.
[0023] The long-lasting formaldehyde-removing and odor-removing antibacterial composition prepared by chemical modification and synergistic compounding reaction has both formaldehyde-removing and odor-removing and antibacterial effects, and has long-lasting efficacy and is safe, non-toxic and non-irritating.
[0024] Furthermore, in step (2), the heating temperature is 85-95°C, preferably 80°C.
[0025] Furthermore, in step (3), the initial emulsification treatment refers to high-speed shear emulsification at a rotation speed of more than 2000 rpm, and the time for the re-emulsification treatment is 10-30 minutes.
[0026] In another aspect, the present invention provides an application of the persistent formaldehyde-removing, odor-removing and antibacterial composition in air purification.
[0027] Beneficial effects:
[0028] The present invention uses citrus essential oil, lemon essential oil and nano manganese oxide as active substances for removing formaldehyde and odor, which can volatilize phenols, negative ions or free radicals for a long time to purify fresh air, and uses chitosan and polyvinylamine as wrapping wall materials to wrap and slowly release the active substances for removing formaldehyde and odor, so that the active substances are more long-lastingly released, thereby achieving a long-lasting purification effect. Active groups such as amino groups or hydroxyl groups in the wrapping wall materials can also undergo polymerization reactions with pollutant molecules such as formaldehyde or nonenal, thereby achieving an efficient odor purification effect. At the same time, the silver ion solution enables the product to have a bactericidal effect at the same time, and the killing rate of common pathogens such as Escherichia coli, Staphylococcus aureus and Candida albicans is as high as 99.9% or more, and the long-lasting antibacterial 72h bactericidal rate is greater than 95%. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a schematic diagram of the preparation process of the formaldehyde-removing, odor-removing and antibacterial composition of Example 1 of the present invention.
[0030] Figure 2 This is a diagram showing the formaldehyde purification effects of the samples prepared in Example 4 and Comparative Examples 1-5 of the present invention.
[0031] Figure 3 This is a diagram showing the purification effects of formaldehyde and nonenal of the samples prepared in Example 1 and Comparative Example 6 of the present invention. DETAILED DESCRIPTION
[0032] In order to better understand the present invention, the content of the present invention is further clearly set forth in conjunction with the embodiments below, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are provided in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.
[0033] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.
[0034] Example 1
[0035] like Figure 1 , 1.0 parts of citrus essential oil, 1.0 parts of lemon essential oil and 0.2 parts of nano manganese oxide (particle size of 5nm) were added to 5.0 parts of phenoxyethanol in turn, and the mixture was stirred by electric stirring (600rpm) to make it completely uniform and ultrasonically dispersed the nano manganese oxide to obtain an oil phase solution. 5.0 parts of chitosan, 0.5 parts of lactic acid and 1.0 parts of polyvinylamine were added to 85 parts of pure water in turn, heated to 90°C in a water bath and stirred by electric stirring to completely dissolve them into a transparent and clear aqueous phase solution. 1.0 parts of Tween 20 were added to the aqueous phase solution and then transferred to a high-speed shear emulsification at more than 2000rpm, and then the oil phase solution was slowly added and emulsified for 10 minutes to make it uniform and stable. Finally, 2.0 parts of silver ion solution (silver concentration of 15g / L, mass ratio of sodium thiosulfate to silver thiosulfate of 9:1) and 0.2 parts of nano zinc oxide were added to the emulsion, and the complexation reaction was completed by electric stirring for 5 minutes to obtain a long-lasting formaldehyde-removing and odor-removing antibacterial composition.
[0036] Example 2
[0037] 2.0 parts of citrus essential oil, 2.0 parts of lemon essential oil and 0.1 parts of nano manganese oxide (particle size of 5 nm) were added to 4.0 parts of phenoxyethanol in sequence, and the mixture was stirred by electric stirring (600 rpm) to make it completely uniform and ultrasonically dispersed the nano manganese oxide to obtain an oil phase solution. 3.0 parts of chitosan, 0.5 parts of lactic acid and 1.0 parts of polyvinylamine were added to 85 parts of pure water in sequence, heated to 90°C in a water bath and stirred by electric stirring to completely dissolve it into a transparent and clear aqueous phase solution. 1.0 parts of Tween 20 were added to the aqueous phase solution and then transferred to a high-speed shear emulsification at more than 2000 rpm, and then the oil phase solution was slowly added and emulsified for 10 minutes to make it uniform and stable. Finally, 1.5 parts of silver ion solution (silver ion concentration of 12 g / L, mass ratio of sodium thiosulfate to silver thiosulfate of 9:1) and 0.2 parts of nano zinc oxide were added to the emulsion, and the complexation reaction was completed by electric stirring for 5 minutes to obtain a long-lasting formaldehyde-removing and odor-removing antibacterial composition.
[0038] Example 3
[0039] 3.0 parts of citrus essential oil, 2.0 parts of lemon essential oil and 0.2 parts of nano manganese oxide (particle size of 10nm) are added to 5.0 parts of phenoxyethanol in sequence, and the mixture is stirred by electric stirring (600rpm) to make it completely uniform and ultrasonically disperse the nano manganese oxide to obtain an oil phase solution. 5.0 parts of chitosan, 0.5 parts of lactic acid and 0.5 parts of polyvinylamine are added to 85 parts of pure water in sequence, heated to 90°C in a water bath and stirred by electric stirring to completely dissolve them into a transparent and clear aqueous phase solution. 1.0 parts of Tween 20 are added to the aqueous phase solution and then transferred to a high-speed shear emulsification at more than 2000rpm, and then the oil phase solution is slowly added and emulsified for 10 minutes to make it uniform and stable. Finally, 5.0 parts of silver ion solution (silver concentration is 20g / L, and the mass ratio of sodium thiosulfate to silver thiosulfate is 9:1) and 0.1 parts of nano zinc oxide are added to the emulsion, and the complexation reaction is completed by electric stirring for 10 minutes to obtain a long-lasting formaldehyde-removing and odor-removing antibacterial composition.
[0040] Example 4
[0041] 1.0 parts of citrus essential oil, 5.0 parts of lemon essential oil and 0.1 parts of nano manganese oxide (particle size of 5 nm) are added to 5.0 parts of phenoxyethanol in sequence, and the mixture is stirred electrically to make it completely uniform and ultrasonically dispersed to obtain an oil phase solution. 2.0 parts of chitosan, 1.0 parts of lactic acid and 1.0 parts of polyvinylamine are added to 85 parts of pure water in sequence, heated to 90°C in a water bath and stirred electrically to make it completely dissolved into a transparent and clear aqueous phase solution. 1.0 parts of Tween 20 are added to the aqueous phase solution and then transferred to a high-speed shear emulsification at more than 2000rpm, and then the oil phase solution is slowly added and emulsified for 5 minutes to make it uniform and stable. Finally, 2.0 parts of silver ion solution (silver concentration is 10g / L, and the mass ratio of sodium thiosulfate to silver thiosulfate is 9:1) and 0.5 parts of nano zinc oxide are added to the emulsion, and the complexation reaction is completed by stirring electrically for 10 minutes to obtain a long-lasting formaldehyde-removing and odor-removing antibacterial composition.
[0042] Example 5
[0043] 5.0 parts of citrus essential oil, 5.0 parts of lemon essential oil and 0.1 parts of nano manganese oxide (particle size of 3nm) are added to 5.0 parts of phenoxyethanol in sequence, and the mixture is stirred electrically (600rpm) to make it completely uniform and ultrasonically dispersed to obtain an oil phase solution. 1.0 parts of chitosan, 0.5 parts of lactic acid and 0.5 parts of polyvinylamine are added to 85 parts of pure water in sequence, heated to 90°C in a water bath and stirred electrically to completely dissolve into a transparent and clear aqueous phase solution. 1.0 parts of Tween 20 are added to the aqueous phase solution and then transferred to a high-speed shear emulsification at more than 2000rpm, and then the oil phase solution is slowly added and emulsified for 10 minutes to make it uniform and stable. Finally, 1.0 parts of silver ion solution (silver concentration is 10g / L, the mass ratio of sodium thiosulfate to silver thiosulfate is 9:1) and 0.3 parts of nano zinc oxide are added to the emulsion, and the complexation reaction is completed by stirring electrically for 5 minutes to obtain a long-lasting formaldehyde-removing and odor-removing antibacterial composition.
[0044] Comparative Example 1
[0045] 1.0 parts of citrus essential oil and 5.0 parts of lemon essential oil were added to 5.0 parts of phenoxyethanol in turn, and stirred electrically to make it completely uniform to obtain an oil phase solution. 2.0 parts of chitosan, 1.0 parts of lactic acid and 1.0 parts of polyvinylamine were added to 85 parts of pure water in turn, heated to 90°C in a water bath and stirred electrically (600rpm) to completely dissolve into a transparent and clear aqueous phase solution. After adding 1.0 parts of Tween 20 to the aqueous phase solution, it was transferred to a high-speed shear emulsification of more than 2000rpm, and then the oil phase solution was slowly added, and emulsified for 5 minutes to make it uniform and stable. Finally, 2.0 parts of silver ion solution (silver ion concentration is 10g / L, the mass ratio of sodium thiosulfate to silver thiosulfate is 9:1) and 0.5 parts of nano zinc oxide were added to the emulsion, and stirred electrically for 10 minutes to complete the complexation reaction.
[0046] Comparative Example 2
[0047] 1.0 parts of citrus essential oil, 5.0 parts of lemon essential oil and 0.1 parts of nano manganese oxide (particle size 2nm) were added to 5.0 parts of phenoxyethanol in sequence, and the mixture was stirred electrically (600rpm) to make it completely uniform and ultrasonically dispersed the nano manganese oxide to obtain an oil phase solution. 2.0 parts of chitosan, 1.0 parts of lactic acid and 1.0 parts of polyvinylamine were added to 85 parts of pure water in sequence, heated to 90°C in a water bath and stirred electrically to completely dissolve into a transparent and clear aqueous phase solution. 1.0 parts of Tween 20 were added to the aqueous phase solution and then transferred to a high-speed shear emulsification at more than 2000rpm, and then the oil phase solution was slowly added and emulsified for 5 minutes to make it uniform and stable. Finally, 2.0 parts of silver ion solution (silver ion concentration was 10g / L, and the mass ratio of sodium thiosulfate to silver thiosulfate was 9:1) and 0.5 parts of nano zinc oxide were added to the emulsion, and stirred electrically for 10 minutes to complete the complexation reaction.
[0048] Comparative Example 3
[0049] 1.0 parts of citrus essential oil, 5.0 parts of lemon essential oil and 0.1 parts of nano manganese oxide (particle size 15nm) were added to 5.0 parts of phenoxyethanol in sequence, and the mixture was stirred electrically (600rpm) to make it completely uniform and ultrasonically dispersed the nano manganese oxide to obtain an oil phase solution. 2.0 parts of chitosan, 1.0 parts of lactic acid and 1.0 parts of polyvinylamine were added to 85 parts of pure water in sequence, heated to 90°C in a water bath and stirred electrically to make it completely dissolved into a transparent and clear aqueous phase solution. After adding 1.0 parts of Tween 20 to the aqueous phase solution, it was transferred to a high-speed shear emulsification at more than 2000rpm, and then the oil phase solution was slowly added, and emulsified for 5 minutes to make it uniform and stable. Finally, 2.0 parts of silver ion solution (silver ion concentration is 10g / L, the mass ratio of sodium thiosulfate to silver thiosulfate is 9:1) and 0.5 parts of nano zinc oxide were added to the emulsion, and stirred electrically for 10 minutes to complete the complexation reaction.
[0050] Comparative Example 4
[0051] 1.0 parts of citrus essential oil, 5.0 parts of lemon essential oil and 0.1 parts of nano manganese oxide (particle size of 5nm) were added to 5.0 parts of phenoxyethanol in sequence, and the mixture was stirred electrically (600rpm) to make it completely uniform and ultrasonically dispersed the nano manganese oxide to obtain an oil phase solution. 2.0 parts of acrylamide, 1.0 parts of lactic acid and 1.0 parts of polyvinylamine were added to 85 parts of pure water in sequence, heated to 90°C in a water bath and stirred electrically to make it completely dissolved into a transparent and clear aqueous phase solution. After adding 1.0 parts of Tween 20 to the aqueous phase solution, it was transferred to a high-speed shear emulsification at more than 2000rpm, and then the oil phase solution was slowly added, and emulsified for 5 minutes to make it uniform and stable. Finally, 2.0 parts of silver ion solution (silver concentration of 10g / L, mass ratio of sodium thiosulfate to silver thiosulfate of 9:1) and 0.5 parts of nano zinc oxide were added to the emulsion, and stirred electrically for 10 minutes to complete the complexation reaction.
[0052] Comparative Example 5
[0053] 1.0 parts of citrus essential oil, 5.0 parts of lemon essential oil and 0.1 parts of nano manganese oxide (particle size of 5nm) were added to 5.0 parts of phenoxyethanol in sequence, and the mixture was stirred electrically (600rpm) to make it completely uniform and ultrasonically dispersed the nano manganese oxide to obtain an oil phase solution. 2.0 parts of chitosan, 1.0 parts of lactic acid and 1.0 parts of polyethyleneimine were added to 85 parts of pure water in sequence, heated to 90°C in a water bath and stirred electrically to make it completely dissolved into a transparent and clear aqueous phase solution. After adding 1.0 parts of Tween 20 to the aqueous phase solution, it was transferred to a high-speed shear emulsification at more than 2000rpm, and then the oil phase solution was slowly added, and emulsified for 5 minutes to make it uniform and stable. Finally, 2.0 parts of silver ion solution (silver ion concentration of 10g / L, mass ratio of sodium thiosulfate to silver thiosulfate of 9:1) and 0.5 parts of nano zinc oxide were added to the emulsion, and stirred electrically for 10 minutes to complete the complexation reaction.
[0054] Comparative Example 6
[0055] The components and their amounts in this comparative example are the same as those in Example 1, except that the components are directly mixed.
[0056] The products prepared in Examples 1-5 and Comparative Example 6 were analyzed for appearance and storage stability. The analysis results are shown in Table 1:
[0057] Table 1 Appearance stability analysis of products prepared in each embodiment and comparative example 6
[0058]
[0059] As can be seen from Table 1, plant essential oils are all oily. If they are directly mixed with other compounds without being encapsulated, stratification will occur, destroying the stability of other substances.
[0060] The sterilization rates of the samples prepared in Examples 1-5 and Comparative Examples 1-6 were tested in accordance with Section 5.2.1 of WS / T 650-2019 (sample concentration: 10%, action time: 30 min). The test results are shown in Table 2.
[0061] Table 2 Sterilization rate of each sample against common pathogens
[0062]
[0063]
[0064] It can be seen from Table 2 that the sample prepared by the method of this embodiment has a good bactericidal effect on Escherichia coli, Staphylococcus aureus and Candida albicans. In Comparative Example 6, the raw materials are directly mixed, which seriously affects the bactericidal performance of the composition.
[0065] The persistent bactericidal rates (sample concentration: 10%, action time: 7d) of the samples prepared in Examples 1-5 and Comparative Examples 1-6 were tested in accordance with Section 5.2.7 of WS / T 650-2019. The test results are shown in Table 3.
[0066] Table 3 Persistent antibacterial rate of each product against common pathogens
[0067]
[0068] It can be seen from Table 3 that the sample prepared by the method of this example has a lasting bactericidal effect on Escherichia coli, Staphylococcus aureus and Candida albicans.
[0069] According to "QB / T 2761-2006 Method for Determining the Purification Effect of Indoor Air Purification Products", the formaldehyde purification effects of Example 4 and Comparative Examples 1-5 (purification time is 24h) were analyzed. The results are as follows: Figure 2 shown.
[0070] According to "QB / T 2761-2006 Method for Determining the Purification Effect of Indoor Air Purification Products", the purification effects of the samples of Example 1 and Comparative Example 6 on formaldehyde and nonenal were tested. The results are as follows: Figure 3 shown.
[0071] from Figure 1 and Figure 2 It can be seen that the formaldehyde removal effect of the sample prepared by the method of this embodiment is more significant.
[0072] Those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.
[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.
Claims
1. A long-lasting formaldehyde-removing and odor-removing antibacterial composition, characterized in that: By weight, it contains the following components:
2. The long-lasting formaldehyde-removing and odor-removing antibacterial composition according to claim 1, characterized in that: The particle size of the nano manganese oxide is 3.0-10.0 nm.
3. The long-lasting formaldehyde-removing and odor-removing antibacterial composition according to claim 1, characterized in that: The silver ion solution consists of a silver thiosulfate solution and a sodium thiosulfate solution, wherein the mass ratio of the sodium thiosulfate to the silver thiosulfate in the silver ion solution is 9:
1.
4. The long-lasting formaldehyde-removing and odor-removing antibacterial composition according to claim 3, characterized in that: The silver content in the silver thiosulfate solution is 10-20 g / L.
5. The persistent formaldehyde-removing and odor-removing antibacterial composition according to claim 1, characterized in that: The preservative is selected from at least one of phenoxyethanol, p-hydroxyacetophenone, caprylyl glycol, and ethylhexylglycerin.
6. The long-lasting formaldehyde-removing and odor-removing antibacterial composition according to claim 1, characterized in that: The emulsifier is selected from at least one of Tween 20, Span 80, PEG-40 hydrogenated castor oil and polyglyceryl-10 myristate.
7. A method for preparing the persistent formaldehyde-removing and odor-removing antibacterial composition according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) Add 0.5-5.0 parts of citrus essential oil, 0.5-5.0 parts of lemon essential oil and 0.1-0.2 parts of nano manganese oxide to 1.0-5.0 parts of preservatives by weight, stir and disperse evenly to prepare an oil phase solution; (2) adding 1.0-5.0 parts of chitosan, 0.5-1.0 parts of lactic acid and 0.5-1.5 parts of polyvinylamine into water and stirring evenly under heating to prepare an aqueous solution; (3) adding the aqueous phase solution to 0.2-1.0 parts of an emulsifier for primary emulsification, and then adding the aqueous phase solution to the oil phase solution for re-emulsification to obtain a formaldehyde-removing and odor-removing microcapsule emulsion; (4) Add 1.0-5.0 parts of silver ion solution and 0.1-0.5 parts of nano zinc oxide to the formaldehyde-removing and odor-removing microcapsule emulsion for complexation treatment to obtain a long-lasting formaldehyde-removing and odor-removing antibacterial composition.
8. The method for preparing the persistent formaldehyde-removing and odor-removing antibacterial composition according to claim 7, characterized in that: In step (2), the heating temperature is 85-95°C.
9. The method for preparing the persistent formaldehyde-removing and odor-removing antibacterial composition according to claim 7, characterized in that: In step (3), the initial emulsification treatment refers to high-speed shear emulsification at a rotation speed of more than 2000 rpm, and the time for the re-emulsification treatment is 10-30 minutes.
10. Use of the persistent formaldehyde-removing and odor-removing antibacterial composition according to any one of claims 1 to 6 in air purification.