Slow-release lasting microencapsulated wall material and application thereof in disinfectant and deodorization product

Abstract

The invention relates to the technical field of disinfection and deodorization, in particular to a slow-release and lasting microencapsulated wall material and application thereof in a disinfectant and a deodorization product, the wall material is a pH-sensitive, temperature-sensitive or water-soluble material and is used for embedding active ingredients; according to the wall material, the modified corn starch is used as a base material, the wall material is endowed with the characteristics of pH sensitivity, temperature sensitivity or water solubility through a modification reaction of maleic anhydride in a specific proportion, at a specific temperature and for a specific time, and the wall material is triggered to be broken / dissolved only in a use scene (such as water encountering when a disinfectant is sprayed and a deodorization product is in contact with a peculiar smell environment and humidity changes); the ineffective consumption of the active ingredients in the storage or non-use stage is avoided, the problems that the traditional active ingredients are high in release speed, short in action duration time, strong in irritation and the like are solved, and the active ingredients are suitable for disinfectants and deodorization products and have practicability and economical efficiency.

Description

Technical Field

[0001] This invention relates to the field of disinfection and deodorization technology, specifically to a slow-release, long-lasting microencapsulated wall material and its application in disinfectants and deodorizing products. Background Technology

[0002] Microencapsulation technology, by encapsulating active ingredients in wall materials, enables controlled release, improved stability, and reduced irritation of these ingredients, and has been widely applied in disinfection, deodorization, and pharmaceutical fields. Disinfectants and deodorizing products, as key products for ensuring public health and indoor air quality, have high demands for the "long-lasting effect" and "low side effects" of their active ingredients.

[0003] In the field of disinfectants, traditional products (such as hypochlorous acid, quaternary ammonium salt, and guanidine disinfectants) have broad-spectrum bactericidal capabilities, but they have core defects: the active disinfectant ingredients have poor stability and are easily affected by environmental factors (such as light, temperature, and humidity) to release or decompose rapidly, resulting in a short duration of disinfection effect (usually only a few hours). Frequent replenishment is required to maintain the effect, which not only increases the cost of use, but may also cause corrosion to the surface of objects due to excessively high instantaneous concentrations (such as the oxidation of metals by hypochlorous acid and the damage of fabrics by quaternary ammonium salts). At the same time, unencapsulated active ingredients are prone to direct volatilization, producing a strong irritating odor, which limits their application in sensitive environments such as medical wards and home settings for mothers and infants.

[0004] In the field of deodorizing products, traditional deodorizers (such as tea polyphenols and zinc oxide products) also face some problems: when the deodorizing active ingredients (such as tea polyphenols are easily oxidized and zinc oxide is easily aggregated and lost) are exposed to air or water, they are easily lost or become ineffective, resulting in short deodorizing time, usually less than 24 hours, requiring repeated spraying, which makes it difficult to meet the needs of long-term deodorization.

[0005] Therefore, developing a microencapsulated wall material with sustained release, environmental sensitivity, dual-domain adaptability, and strong synergy is an urgent problem to be solved. This material can not only solve the problems of traditional disinfectants such as "rapid release, strong odor, and strong corrosion" but also overcome the defects of traditional deodorizing products such as "short duration, easy failure, and residue". Summary of the Invention

[0006] The purpose of this invention is to provide a sustained-release microencapsulated wall material.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A sustained-release microencapsulated wall material, wherein the wall material is a pH-sensitive, temperature-sensitive, or water-soluble material, used for encapsulating active ingredients.

[0008] As a further technical solution, the preparation method of the wall material is as follows: corn starch and maleic anhydride solution with a mass fraction of 12%-18% are stirred and reacted at 55-70℃ for 3-4 hours at a material-to-liquid ratio of 1:6-8. After the reaction is completed, the mixture is washed with deionized water until neutral and then dried to obtain the final product.

[0009] As a further technical solution, the microcapsules formed by the wall material have a particle size of 10-60 μm.

[0010] As a further technical solution, when the wall material encapsulates the active ingredient, the mass percentage of the active ingredient in the microcapsule is 40%-60%.

[0011] Application of slow-release, long-lasting microencapsulated wall materials in disinfectants and deodorizing products.

[0012] As a further technical solution, when the microencapsulated wall material is applied to a disinfectant, the encapsulated active ingredient is a disinfectant active ingredient, which is any one of slightly acidic hypochlorous acid, quaternary ammonium salt, and guanidine; when the microencapsulated wall material is applied to a deodorizing product, the encapsulated active ingredient is a deodorizing active ingredient, which is any one or a combination of two of tea polyphenols and zinc oxide.

[0013] As a further technical solution, the method for preparing a disinfectant or deodorizing product containing the microencapsulated wall material includes the following steps: mixing the active ingredient, the wall material, the surfactant, the stabilizer and water, first performing ultrasonic-assisted dispersion, with an ultrasonic frequency of 20-40 kHz and an ultrasonic time of 10-30 min, and then preparing microcapsules by spray drying; before use, mixing the microcapsules with water and stirring evenly to obtain the disinfectant or deodorizing product.

[0014] As a further technical solution, the surfactant is sodium dodecyl sulfate; The surfactant accounts for 0.5%-2% of the total mass of the disinfectant or deodorizing product.

[0015] As a further technical solution, the stabilizer is disodium ethylenediaminetetraacetate; the mass of the stabilizer accounts for 0.3%-0.5% of the total mass of the disinfectant or deodorizing product.

[0016] As a further technical solution, the inlet air temperature of the spray drying is 120-180℃ and the outlet air temperature is 60-90℃; by controlling the feed rate of the spray drying to 10-15mL / min, the average particle size of the microcapsules is 20-80μm and the wall thickness is 3-5μm.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The wall material of this invention uses modified corn starch as the base material. Through a modification reaction of maleic anhydride in a specific ratio (material-liquid ratio 1:6-8), at a specific temperature (55-70℃) and for a specific time (3-4h), the wall material is endowed with pH-sensitive, temperature-sensitive, or water-soluble properties. The wall material is only triggered to crack / dissolve in the usage scenario (such as when disinfectant is sprayed with water or when deodorizing products come into contact with odors and the humidity of the environment changes), thus avoiding the ineffective consumption of active ingredients during storage or non-use.

[0018] When the wall material of this invention is applied to disinfectant, its modified starch wall material can tightly encapsulate slightly acidic hypochlorous acid, quaternary ammonium salt or guanidine disinfectant active ingredients, reducing the direct volatilization of active ingredients and significantly reducing irritating odor; at the same time, the slow-release characteristics of the wall material allow the disinfectant active ingredients to be released slowly, and the effective chlorine retention rate still reaches 64.5%-69.3% after 72 hours, reducing the frequency of replenishment and usage costs.

[0019] In addition, the disinfectant active ingredients, combined with the enhanced permeability of sodium dodecyl sulfate and the metal ion chelation effect of disodium EDTA, further improve the sterilization efficiency and storage stability of the disinfectant, making it suitable for various scenarios such as medical, household, and catering.

[0020] When the wall material of this invention is applied to deodorizing products, its modified starch wall material can effectively encapsulate deodorizing active ingredients such as tea polyphenols and zinc oxide, avoiding oxidation and inactivation of tea polyphenols due to direct contact with air, as well as the aggregation and loss of zinc oxide. The water-soluble properties of the wall material allow the active ingredients to be slowly released only after spraying (contact with moisture on the surface to be deodorized or ambient humidity). Within 72 hours, the removal rates of ammonia and hydrogen sulfide can reach 78.9% and 80.5%, respectively, significantly extending the deodorizing effect. At the same time, the microencapsulated structure can reduce the direct irritation of the deodorizing active ingredients: the modified starch wall material itself is non-irritating and can slow down the direct contact between the active ingredients and skin and fabrics, avoiding skin dryness caused by high concentrations of zinc oxide or pigment residue after oxidation of tea polyphenols, making it suitable for sensitive deodorizing scenarios such as indoor spaces, automobiles, and public restrooms. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention relates to the field of microencapsulated wall material technology, specifically disclosing a sustained-release microencapsulated wall material and its application in disinfectants and deodorizing products. The wall material is a modified corn starch material that is pH-sensitive, temperature-sensitive, or water-soluble. Prepared through a specific process, it achieves efficient encapsulation and sustained release of active ingredients, solving problems such as rapid release, short duration of action, and strong irritation associated with traditional active ingredients. It is suitable for disinfectants and deodorizing products, combining practicality and economy.

[0023] Raw materials include: Corn starch: Commercially available food-grade or industrial-grade corn starch with a purity of ≥98% can be used without additional pretreatment.

[0024] Maleic anhydride solution: a commercially available analytical grade solution with a mass fraction of 12%-18%, which can be used directly in wall material modification reactions without dilution.

[0025] Disinfecting active ingredients: slightly acidic hypochlorous acid (pH 5.0-6.5, food grade / medical grade), quaternary ammonium salts (industrial grade such as dodecyl dimethyl benzyl ammonium chloride and disedecyl dimethyl ammonium chloride), and guanidines (medical grade such as polyhexamethylene biguanide hydrochloride and chlorhexidine gluconate).

[0026] Deodorizing active ingredients: tea polyphenols (food-grade powder with a purity of ≥95%) and zinc oxide (industrial-grade powder with a particle size of 50-100nm), which can be used alone or in combination.

[0027] Surfactant: Sodium dodecyl sulfate (analytical grade, purity ≥99%), used to enhance the permeability of active ingredients.

[0028] Stabilizer: Disodium ethylenediaminetetraacetate (analytical grade, purity ≥99%), used to enhance the stability of the system.

[0029] Deionized water: conductivity ≤10μS / cm, laboratory-made or commercially available, used as a reaction and dilution solvent.

[0030] The following are specific examples: Example 1: Application of microencapsulated wall materials in slightly acidic hypochlorous acid disinfectant; Wall material preparation: Corn starch and 15% maleic anhydride solution were mixed at a material-to-liquid ratio of 1:7 and placed in a constant temperature water bath. The mixture was stirred at 300 r / min for 3.5 h at 60 °C. After the reaction was completed, the product was repeatedly washed with deionized water until the pH of the washing solution was 7.0 (neutral). Then, it was dried in a vacuum drying oven at 60 °C for 8 h to obtain the modified corn starch wall material.

[0031] Microcapsule preparation: Take 50g of slightly acidic hypochlorous acid (pH 6.0, 50% of the active ingredient in the microcapsules by mass), add it to the above dispersion, then add 5g of sodium dodecyl sulfate (1.0% of the total mass of the final disinfectant solution) and 2g of disodium ethylenediaminetetraacetate (0.4% of the total mass of the final disinfectant solution), and add deionized water to a total mass of 500g. After stirring evenly, transfer to an ultrasonicator and sonicate at 30kHz for 20min to obtain a mixed emulsion. Pass the emulsion into a spray dryer, set the inlet air temperature to 150℃, the outlet air temperature to 75℃, and the feed rate to 12mL / min, and collect the microcapsules (average particle size 30-50μm, wall thickness 4μm).

[0032] Disinfectant preparation: Before use, take 25g of microcapsules, add 475mL of deionized water, stir at 200r / min for 10min until the microcapsules are completely dissolved and dispersed to obtain 500mL of slow-release microencapsulated disinfectant.

[0033] Example 2: Application of microencapsulated wall materials in quaternary ammonium salt disinfectant; Wall material preparation: Corn starch and 12% maleic anhydride solution were mixed at a material-to-liquid ratio of 1:6 and stirred at 280 r / min for 4 h at 55 °C. After washing until neutral, the mixture was vacuum dried at 55 °C for 10 h to obtain the modified corn starch wall material.

[0034] Microcapsule preparation: Take 40g of dodecyl dimethyl benzyl ammonium chloride (quaternary ammonium salt, active ingredient mass percentage 40%), add it to the above dispersion, then add 2.5g of sodium dodecyl sulfate (0.5% of the total mass of the final disinfectant solution) and 1.5g of disodium ethylenediaminetetraacetate (0.3% of the total mass of the final disinfectant solution), and add deionized water to a final volume of 500g. After stirring, sonicate at 20kHz for 30min to obtain an emulsion. Spray drying parameters were set as follows: inlet air temperature 120℃, outlet air temperature 60℃, feed rate 10mL / min. Collect microcapsules (average particle size 10-30μm, wall thickness 3μm).

[0035] Disinfectant preparation: Take 20g of microcapsules, add 480mL of deionized water, stir at 200r / min for 15min to obtain 500mL of quaternary ammonium salt disinfectant.

[0036] Example 3: Application of microencapsulated wall materials in guanidine disinfectant solutions; Wall material preparation: Corn starch and 18% maleic anhydride solution were mixed at a material-to-liquid ratio of 1:8 and stirred at 320 r / min for 3 h at 70 °C. After washing until neutral, the mixture was vacuum dried at 65 °C for 7 h to obtain the modified corn starch wall material.

[0037] Microcapsule preparation: Take 60g of polyhexamethylene biguanide hydrochloride (guanidine, active ingredient mass percentage 60%), add it to the above dispersion, then add 10g of sodium dodecyl sulfate (2.0% of the total mass of the final disinfectant solution) and 2.5g of disodium EDTA (0.5% of the total mass of the final disinfectant solution), and add deionized water to a final volume of 500g. After stirring, sonicate at 40kHz for 10min to obtain an emulsion. Spray drying parameters are set as follows: inlet air temperature 180℃, outlet air temperature 90℃, feed rate 15mL / min. Collect microcapsules (average particle size 50-60μm, wall thickness 5μm).

[0038] Disinfectant preparation: Take 30g of microcapsules, add 470mL of deionized water, stir at 200r / min for 10min to obtain 500mL of guanidine disinfectant.

[0039] Example 4: Application of microencapsulated wall materials in disinfectant solutions containing mixed disinfectant active ingredients; Wall material preparation: Corn starch and 14% maleic anhydride solution were mixed at a material-to-liquid ratio of 1:6.5 and stirred at 300 r / min for 3.2 h at 65 °C. After washing until neutral, the mixture was vacuum dried at 60 °C for 8 h to obtain the modified corn starch wall material.

[0040] Microcapsule preparation: 25g of slightly acidic hypochlorous acid and 25g of dodecyl dimethyl benzyl ammonium chloride (mixed active ingredients, 50% by mass) were added to the above dispersion, followed by 6g of sodium dodecyl sulfate (1.2% of the total mass of the final disinfectant) and 1.75g ​​of disodium ethylenediaminetetraacetate (0.35% of the total mass of the final disinfectant). Deionized water was added to a final volume of 500g. After stirring, the mixture was sonicated at 35kHz for 25 minutes to obtain an emulsion. Spray drying parameters were set as follows: inlet air temperature 140℃, outlet air temperature 70℃, and feed rate 11mL / min. Microcapsules (average particle size 20-40μm, wall thickness 3.5μm) were collected.

[0041] Disinfectant preparation: Take 22g of microcapsules, add 478mL of deionized water, stir at 200r / min for 12min to obtain 500mL of mixed disinfectant active ingredients disinfectant solution.

[0042] Example 5: Application of microencapsulated wall material in tea polyphenol-zinc oxide composite deodorizing product; Wall material preparation: Corn starch and 16% maleic anhydride solution were mixed at a material-to-liquid ratio of 1:7.5 and stirred at 290 r / min for 3.8 h at 58 °C. After washing until neutral, the mixture was vacuum dried at 60 °C for 9 h to obtain the modified corn starch wall material.

[0043] Microcapsule preparation: Take 20g of tea polyphenols and 10g of zinc oxide (compound deodorizing active ingredient, 50% by mass), add them to the above dispersion, then add 9g of sodium dodecyl sulfate (1.8% of the total mass of the final deodorizing product) and 2.25g of disodium ethylenediaminetetraacetate (0.45% of the total mass of the final deodorizing product), and add deionized water to a total mass of 450g. Stir at 250r / min for 15min, then sonicate at 25kHz for 15min to obtain a mixed emulsion. Pass the emulsion into a spray dryer, set the inlet air temperature to 160℃, the outlet air temperature to 80℃, and the feed rate to 14mL / min, and collect the microcapsules (average particle size 40-60μm, wall thickness 4.5μm).

[0044] Preparation of deodorizing product: Before use, take 30g of microcapsules, add 470mL of deionized water, stir at 200r / min for 12min until the microcapsules are completely dissolved and dispersed, and obtain 500mL of slow-release microencapsulated deodorizing product.

[0045] Comparative Example 1: Disinfectant solution without modified corn starch wall material; The raw materials and steps of Example 1 are used, except that: in step 1, the maleic anhydride modification of corn starch is not carried out, and unmodified ordinary corn starch is used directly as the wall material, and other parameters are not adjusted.

[0046] Comparative Example 2: Deodorizing products that have not undergone microencapsulation treatment; The raw materials and steps of Example 5 were used, except that the microcapsule preparation in step 3 was omitted. Instead, 20g of tea polyphenols, 10g of zinc oxide, 9g of sodium dodecyl sulfate, 2.25g of disodium ethylenediaminetetraacetate and 458.75mL of deionized water were directly mixed and stirred at 250r / min for 20min to obtain a non-microencapsulated deodorizing product.

[0047] Disinfectant sterilization effect test: According to GB27952-2021 "General Requirements for Disinfectants for Ordinary Object Surfaces", the killing effect on Escherichia coli (ATCC25922) and Staphylococcus aureus (ATCC6538) was tested. The disinfectant solution was diluted to the usage concentration, and after 10 minutes of contact time, the viable bacteria count was determined using the pour culture method. The killing rate was calculated as follows (killing rate = (viable bacteria count in control group - viable bacteria count in test group) / viable bacteria count in control group × 100%). Each group was tested three times, and the average value was taken. The results are as follows: Table 1 As can be seen from Table 1, both the examples and the comparative examples showed high kill rates against the two bacteria, demonstrating excellent bactericidal effects.

[0048] Disinfectant odor assessment test; Referring to GB / T22374-2008 "Odor Evaluation Method for Daily Chemical Products", 10 professional evaluators (5 males and 5 females) were selected to conduct evaluations in a closed space (1m) at 20℃ and 50% relative humidity. 3 After allowing 100 mL of disinfectant to evaporate naturally for 30 minutes, an odor score was calculated (1 point: no obvious odor; 5 points: moderate odor; 10 points: strong pungent odor). The average score was taken, and the results are as follows: Table 2 As can be seen from Table 2, the odor scores of the embodiments are all between 3.0 and 3.5, which shows low odor characteristics. This is because the microcapsule wall material encapsulates the available chlorine, reducing the irritating odor produced by its direct volatilization.

[0049] Disinfectant sustained-release performance test; The available chlorine content of the disinfectant solution at 0h, 24h, 48h, and 72h was determined using the iodometric titration method (referring to the available chlorine determination method in GB / T19106-2013 "Sodium Hypochlorite"). The available chlorine retention rate at different time points was calculated (retention rate = available chlorine content at a certain time point / initial available chlorine content × 100%). Each group was tested three times, and the average value was taken. The results are as follows: Table 3 As shown in Table 3, the effective chlorine retention rate of Examples 1-4 remained at 64.5%-69.3% after 72 hours, demonstrating a significant slow-release effect. This is because the modified starch wall material can slowly release effective chlorine. Comparative Example 1, which did not use modified corn starch wall material, experienced relatively rapid chlorine evaporation, thus failing to achieve long-term disinfection.

[0050] Example 5: Deodorization effect test; Referencing Appendix D (Determination of Ammonia by Indophenol Blue Spectrophotometric Method) and Appendix E (Determination of Hydrogen Sulfide by Methylene Blue Spectrophotometric Method) of GB / T18883-2022 "Indoor Air Quality Standard", and combined with the evaluation method of QB / T4993-2016 "Household and Similar Use Deodorants".

[0051] Experimental instruments and reagents: 1m 3 A sealed experimental chamber (constant temperature 25℃±2℃, constant humidity 50%±5%), an atmospheric sampler (0.5L / min), a spectrophotometer, indophenol blue reagent, methylene blue reagent, and ammonia standard gas (100mg / m³). 3 Hydrogen sulfide standard gas (50 mg / m³) 3 ), 10cm×10cm sterile filter paper.

[0052] Experimental chamber pretreatment: The experimental chamber was left empty for 24 hours, and then clean air was introduced until the concentrations of ammonia and hydrogen sulfide were both <0.01 mg / m³.3 Eliminate blank interference.

[0053] Odor gas injection: Inject ammonia standard gas into the chamber to an initial concentration of 10 mg / m³. 3 Inject hydrogen sulfide standard gas to an initial concentration of 5 mg / m³ 3 Turn on the fan and stir for 30 minutes to make the gas uniform.

[0054] Sample placement: Take 50 mL of each of the deodorizing products of Example 5 and Comparative Example 2, spray them onto two 10 cm × 10 cm sterile filter papers, place them in symmetrical positions inside the chamber, and close the chamber door to start the timer.

[0055] Sampling and measurement: At 0h, 6h, 12h, 24h, 48h, and 72h, 10L of gas was collected at three points in the chamber: the upper (1.5m), middle (0.8m), and lower (0.2m). After color development according to GB method, the absorbance was measured, and the average concentration was calculated.

[0056] Removal rate calculation: Removal rate = (Initial concentration - Concentration at sampling) / Initial concentration × 100%. Each group was repeated 3 times, and the average value was taken. The results are as follows: Table 4 As shown in Table 4, the removal rates of ammonia and hydrogen sulfide by the deodorizing product in Example 5 continued to rise and remained high within 72 hours, indicating that the microencapsulated wall material achieved the slow release of the deodorizing active ingredients and extended the action time. In contrast, Comparative Example 2, due to the lack of encapsulation treatment, had its active ingredients released and consumed rapidly, resulting in a significant decrease in the removal rate in the later stages. This demonstrates that the microencapsulated wall material of this invention is the key to improving the long-lasting performance of the deodorizing product.

[0057] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A sustained-release, long-lasting microencapsulated wall material, characterized in that, The wall material is a pH-sensitive, temperature-sensitive, or water-soluble material used for encapsulating active ingredients.

2. The sustained-release, long-lasting microencapsulated wall material according to claim 1, characterized in that, The wall material is prepared by stirring corn starch and maleic anhydride solution with a mass fraction of 12%-18% at 55-70℃ for 3-4 hours at a material-to-liquid ratio of 1:6-8. After the reaction is completed, the mixture is washed with deionized water until neutral and then dried to obtain the final product.

3. The sustained-release, long-lasting microencapsulated wall material according to claim 2, characterized in that, The microcapsules formed by the wall material have a particle size of 10-60 μm.

4. The sustained-release, long-lasting microencapsulated wall material according to claim 1, characterized in that, When the wall material encapsulates the active ingredient, the mass percentage of the active ingredient in the microcapsule is 40%-60%.

5. The use of the sustained-release, long-lasting microencapsulated wall material according to any one of claims 1-4 in disinfectants and deodorizing products.

6. The application according to claim 5, characterized in that, When the microencapsulated wall material is applied to a disinfectant, the encapsulated active ingredient is a disinfectant active ingredient, which is any one of slightly acidic hypochlorous acid, quaternary ammonium salt, or guanidine; when the microencapsulated wall material is applied to a deodorizing product, the encapsulated active ingredient is a deodorizing active ingredient, which is any one or a combination of two of tea polyphenols and zinc oxide.

7. The application according to claim 5, characterized in that, A method for preparing a disinfectant or deodorizing product containing the microencapsulated wall material includes the following steps: mixing the active ingredient, the wall material, the surfactant, the stabilizer, and water; first, performing ultrasonic-assisted dispersion with an ultrasonic frequency of 20-40 kHz and an ultrasonic time of 10-30 min; then preparing microcapsules using a spray drying method; before use, mixing the microcapsules with water and stirring evenly to obtain the disinfectant or deodorizing product.

8. The application according to claim 7, characterized in that, The surfactant is sodium dodecyl sulfate; the surfactant accounts for 0.5%-2% of the total mass of the disinfectant or deodorizing product.

9. The application according to claim 7, characterized in that, The stabilizer is disodium ethylenediaminetetraacetate; the stabilizer accounts for 0.3%-0.5% of the total mass of the disinfectant or deodorizing product.

10. The application according to claim 7, characterized in that, The inlet air temperature of the spray dryer is 120-180℃, and the outlet air temperature is 60-90℃. By controlling the feed rate of the spray dryer to 10-15mL / min, the average particle size of the microcapsules is 20-80μm and the wall thickness is 3-5μm.

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