Surface deodorizing disinfectant, spray and preparation method thereof

Abstract

The invention relates to a surface deodorizing disinfectant, a spray and a preparation method thereof, and belongs to the technical field of disinfectants. The surface deodorizing disinfectant comprises the following components: 0.1-10% of an active component, 0.5-5% of a deodorizing synergist, 0.1-3% of a surfactant, 1-10% of a solvent, 0.01-0.05% of a pH regulator and the balance of deionized water, the active component is prepared from the following components in parts by mass: 3 to 20 parts of glycerol, 5 to 30 parts of ethanol, 1 to 2 parts of abrus precatorius extract, 0.8 to 1.5 parts of 1-hydroxypiperidine-2-carboxylic acid methyl ester, 0.5 to 5 parts of linalool and 10 to 15 parts of biosynthetic nano silver. The surface odor-removing disinfectant does not contain irritant groups, is non-irritant to skin, can remove human body odor, toilet odor and garbage odor, is wide in application scene and wide in disinfection spectrum, decomposes odor molecules from the source, avoids three-hand odor, and avoids purchase of different types of disinfection sprays in different scenes.

Description

Technical Field

[0001] This invention belongs to the field of disinfectant technology, specifically relating to a surface deodorizing disinfectant, a spray, and its preparation method. Background Technology

[0002] In recent years, with the simultaneous rise in health awareness and the concept of a refined lifestyle, the definition of "disinfection" in consumers' minds has been rewritten: it has evolved from the early "visible reduction in bacterial colonies" to a four-dimensional approach encompassing "zeroing out invisible odor molecules, no damage to fabric fibers, therapeutic fragrance, and safety in mother and baby settings." Trending topics on social e-commerce platforms, third-party consumer reports, and user interviews with leading brands all point to the same conclusion: "sterilization" has become a basic requirement, while "odor removal without damaging clothes, lingering fragrance without being pungent, and preventing material aging" are the implicit levers that determine repeat purchases. However, mainstream technological approaches still rely on the physical combination of "chemical disinfectants + synthetic fragrances + solvents." While non-alcohol-based disinfectants offer broad-spectrum, logarithmic-level killing, they frequently exhibit side effects in real-world home environments, such as corroding metals, bleaching fabrics, irritating the respiratory tract, or accelerating the cracking of polymer materials. Traditional 75% ethanol solutions, despite their excellent safety profile and being listed as the first choice in many pharmacopoeias, suffer from inherent drawbacks under home temperature and humidity conditions, including rapid evaporation, short contact time, and a collapsed tail of the disinfection curve. Furthermore, they have a low permeability coefficient to protein-containing biofilms and exhibit a significant shielding effect against organic contaminants such as sebum, saliva, and pet secretions. Odor removal often relies on the sensory masking effect of synthetic fragrances, failing to truly decompose low-threshold odor molecules like hydrogen sulfide, amines, and aldehydes, resulting in a more unpleasant "third-hand odor" when fragrance and odor mix. Meanwhile, the market is segmented into dozens of SKUs based on specific scenarios, such as fabric disinfectants, kitchen and bathroom disinfectants, air disinfectants, and car disinfectants. Consumers need to prepare disinfectants with different packaging, fragrances, and precautions for different spaces, leading to a simultaneous increase in usage costs, storage space requirements, and cognitive burden. As a result, a visible crack has appeared in the industry: the demand side expects "one bottle for all purposes, multiple effects in one, and an upgraded experience", while the supply side is caught in a reverse cycle of "more and more ingredients, higher and higher risks, and more and more detailed scenarios". Therefore, the market urgently needs a multi-functional surface spray that integrates efficient disinfection, thorough deodorization, safety and environmental protection, and gentle non-corrosiveness. Summary of the Invention

[0003] The first objective of this invention is to provide a surface deodorizing disinfectant that has a broad disinfection spectrum, works rapidly, and can decompose odor molecules at their source.

[0004] The second objective of this invention is to provide a surface deodorizing and disinfecting spray.

[0005] The third objective of this invention is to provide a method for preparing a surface deodorizing and disinfecting spray.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A surface deodorizing disinfectant, by mass percentage, comprises the following components: 0.1-10% active ingredient, 0.5-5% deodorizing synergist, 0.1-3% surfactant, 1-10% solvent, 0.01-0.05% pH adjuster, and the balance being deionized water; The active components, calculated by weight, include 3-20 parts glycerol, 5-30 parts ethanol, 1-2 parts Abrus precatorius extract, 0.8-1.5 parts methyl 1-hydroxypiperidine-2-carboxylate, 0.5-5 parts linalool, and 10-15 parts biosynthesized nano-silver.

[0007] Furthermore, the preparation method of the Abrus precatorius extract is as follows: Abrus precatorius powder is stirred evenly in a 90% (v / v) ethanol aqueous solution, stirred at 40-50°C for 2-5 h, filtered to obtain a primary filtrate and a primary filter residue; the primary filter residue is stirred evenly in a 75% (v / v) ethanol aqueous solution, stirred at 60-70°C for 2-5 h, filtered to obtain a secondary filtrate and a secondary filter residue; the primary and secondary filtrates are combined, concentrated and dried to obtain the Abrus precatorius extract.

[0008] Furthermore, the preparation method of the biosynthesized nano-silver is as follows: fraxinus bark and white willow are mixed and pulverized to obtain powder. Water is added to the powder, and the supernatant is collected by ultrasonic extraction and centrifugation. The supernatant is then freeze-dried to obtain an extract. Silver nitrate solution is added to the extract to obtain a reaction system, and the reaction is carried out at 55-60℃ for 15-30 min to obtain the final product.

[0009] Furthermore, the mass ratio of Qinpi (Fraxinus bark) to Bailiu (Ligusticum striatum) is 3:3-5; and 20-30 mL of water is added for each gram of the powder.

[0010] Furthermore, the final concentration of silver nitrate in the reaction system is 1–2 mM, and the final concentration of the extract is 10–30 mg / mL.

[0011] Furthermore, the pH of the reaction system is 7-8.

[0012] Furthermore, the active components, calculated by mass, include 3-10 parts of glycerol, 10-30 parts of ethanol, 1-2 parts of Abrus precatorius extract, 0.8-1.2 parts of methyl 1-hydroxypiperidine-2-carboxylate, 0.5-5 parts of linalool, and 12-15 parts of biosynthesized nano-silver.

[0013] Furthermore, the deodorizing synergist is cyclodextrin, the surfactant is a nonionic surfactant, the solvent is isopropanol, and the pH adjuster is citric acid or sodium citrate.

[0014] A surface deodorizing and disinfecting spray comprises a propellant and the aforementioned surface deodorizing and disinfecting liquid, wherein the propellant is one or more of propane, n-butane, isobutane, and dimethyl ether.

[0015] A method for preparing a surface deodorizing and disinfecting spray involves dissolving the formulated amounts of acacia extract, linalool, biosynthetic nano-silver, deodorizing synergist, and pH adjuster in water to obtain a first mixed liquid; mixing the formulated amounts of methyl 1-hydroxypiperidine-2-carboxylate, ethanol, glycerol, surfactant, and solvent evenly to obtain a second mixed liquid; slowly adding the second mixed liquid to the first mixed liquid, stirring evenly, filtering, filling into an aerosol can, sealing the valve, and filling with propellant.

[0016] The beneficial effects of this invention are: The surface deodorizing disinfectant of this invention does not contain irritating groups, is non-irritating to the skin, and can remove human odors, bathroom odors, and garbage odors. It has a wide range of applications, a broad disinfection spectrum, and decomposes odor molecules at the source, avoiding "third-hand odors" and eliminating the need to purchase different types of disinfectant sprays for different scenarios.

[0017] The methyl 1-hydroxypiperidine-2-carboxylate of this invention possesses both hydroxyl and ester groups. It can act on the microbial membrane interface through hydrogen bonding in ethanol and glycerol environments, enhancing the penetration and destructive ability of alcohols on lipids, thereby improving bactericidal efficiency. Its ester structure can synergize with Abrus precatorius extract and linalool, maintaining a high antibacterial rate while being non-irritating to the skin. The hydroxyl group acts as a donor, forming a hydrogen bond with the allyl oxygen atom of linalool; simultaneously, the terminal olefin bond of linalool can form a weak C–H···O=C auxiliary hydrogen bond with the carbonyl oxygen of the ester of methyl 1-hydroxypiperidine-2-carboxylate, forming a two-dimensional zigzag network. The chair conformation of the piperidine ring makes the polar region of methyl 1-hydroxypiperidine-2-carboxylate and the isopropylene side chain of linalool dimensionally complementary, avoiding steric hindrance and providing geometric conditions for alternating stacking. After the co-aggregation of methyl 1-hydroxypiperidine-2-carboxylate and linalool, hydrogen bonds are formed between the hydroxyl side of methyl 1-hydroxypiperidine-2-carboxylate and the sulfhydryl group of hydrogen sulfide, and between the ester side and the nitrogen group of amines. Both simultaneously immobilize odor molecules, exhibiting adsorption strength far superior to that of linalool alone. After immobilizing odor molecules, the conjugated double bond of linalool donates electrons to the odor, while the carbonyl group of methyl 1-hydroxypiperidine-2-carboxylate accepts electrons, forming a transient charge-transfer complex. This complex weakens the sulfhydryl and carbon-nitrogen bonds in the odor molecules, causing them to break down and transform into odorless small molecules, achieving complete decomposition rather than simply masking the aroma.

[0018] This invention utilizes methyl 1-hydroxypiperidine-2-carboxylic acid and biosynthesized nano-silver for synergistic antibacterial activity, exhibiting good antibacterial properties and a broad antibacterial spectrum. Detailed Implementation

[0019] The following will provide further details with reference to embodiments of the present invention.

[0020] The CAS number for methyl 1-hydroxypiperidine-2-carboxylic acid is 2624131-95-7. Example 1

[0021] The surface deodorizing disinfectant of Example 1 comprises the following components: 5 kg of active ingredient, 0.5 kg of α-cyclodextrin, 1 kg of alkyl glycoside, 4 kg of isopropanol, 0.01 kg of citric acid, and the balance being deionized water. The active ingredient includes 3 kg of glycerol, 25 kg of ethanol, 1.6 kg of Abrus precatorius extract, 1.0 kg of methyl 1-hydroxypiperidine-2-carboxylate, 1.2 kg of linalool, and 12 kg of biosynthesized nano-silver.

[0022] The preparation process of Abrus precatorius extract is as follows: 5 kg of Abrus precatorius powder is stirred evenly in 50 L of 90% ethanol aqueous solution at 45℃ for 3 h, and then filtered to obtain a primary filtrate and a primary filter residue; the primary filter residue is stirred evenly in 50 L of 75% ethanol aqueous solution at 65℃ for 3 h, and then filtered to obtain a secondary filtrate and a secondary filter residue; the primary and secondary filtrates are combined, concentrated and dried to obtain Abrus precatorius extract.

[0023] The preparation method of biosynthesized silver nanoparticles is as follows: 9 kg of Fraxinus chinensis bark and 15 kg of Salix babylonica were mixed and pulverized to obtain powder. 500 L of water was added to the powder, and the mixture was extracted by ultrasonication. The supernatant was collected by centrifugation and freeze-dried to obtain the extract. Silver nitrate solution was added to the extract to obtain the reaction system. The pH of the reaction system was adjusted to 7, and the reaction was carried out at 55℃ for 30 min to obtain the final concentration of silver nanoparticles. The final concentration of silver nitrate in the reaction system was 1 mM, and the final concentration of the extract was 20 mg / mL.

[0024] The preparation process of the surface deodorizing and disinfecting spray in Example 1 is as follows: The formulated amounts of Abrus precatorius extract, linalool, biosynthetic nano-silver, α-cyclodextrin, and citric acid are dissolved in water to obtain mixed liquid one. The formulated amounts of methyl 1-hydroxypiperidine-2-carboxylate, ethanol, glycerol, alkyl glycoside, and isopropanol are mixed evenly to obtain mixed liquid two. Mixed liquid two is slowly added to mixed liquid one, stirred evenly, filtered, and then poured into an aerosol can. The valve is sealed, and isobutane is added. The amount of isobutane added is 30% of the total mass of the surface deodorizing and disinfecting spray in Example 1. Example 2

[0025] The surface deodorizing disinfectant of Example 2 comprises the following components: 10 kg of active ingredient, 5 kg of β-cyclodextrin, 3 kg of fatty alcohol polyoxyethylene ether, 10 kg of isopropanol, 0.05 kg of sodium citrate, and the remainder being deionized water. The active ingredient includes 5 kg of glycerol, 30 kg of ethanol, 1.8 kg of Abrus precatorius extract, 1.2 kg of methyl 1-hydroxypiperidine-2-carboxylate, 3 kg of linalool, and 15 kg of biosynthesized nano-silver.

[0026] The preparation process of Abrus precatorius extract is as follows: 5 kg of Abrus precatorius powder is stirred evenly in 50 L of 90% ethanol aqueous solution at 40℃ for 5 h, and then filtered to obtain the first filtrate and the first filter residue; the first filter residue is stirred evenly in 50 L of 75% ethanol aqueous solution at 60℃ for 5 h, and then filtered to obtain the second filtrate and the second filter residue; the first and second filtrates are combined, concentrated and dried to obtain Abrus precatorius extract.

[0027] The preparation method of biosynthesized silver nanoparticles is as follows: 9 kg of Fraxinus chinensis bark and 9 kg of Salix babylonica bark were mixed and pulverized to obtain powder. 500 L of water was added to the powder, and the mixture was extracted by ultrasonication. The supernatant was collected by centrifugation and freeze-dried to obtain the extract. Silver nitrate solution was added to the extract to obtain the reaction system. The pH of the reaction system was adjusted to 8, and the reaction was carried out at 60℃ for 15 min to obtain the final product. The final concentration of silver nitrate in the reaction system was 2 mM, and the final concentration of the extract was 10 mg / mL.

[0028] The preparation process of the surface deodorizing and disinfecting spray in Example 2 is as follows: The formulated amounts of acacia extract, linalool, biosynthesized nano-silver, β-cyclodextrin, and sodium citrate are dissolved in water to obtain mixed liquid one. The formulated amounts of methyl 1-hydroxypiperidine-2-carboxylate, ethanol, glycerol, fatty alcohol polyoxyethylene ether, and isopropanol are mixed evenly to obtain mixed liquid two. Mixed liquid two is slowly added to mixed liquid one, stirred evenly, filtered, and then poured into an aerosol can. The valve is sealed, and a mixture of propane and n-butane is filled. The amount of propane and n-butane added is 40% of the total mass of the surface deodorizing and disinfecting spray in Example 2. The mass ratio of propane to n-butane is 1:2. Example 3

[0029] The surface deodorizing disinfectant of Example 3 comprises the following components: 1 kg of active ingredient, 3 kg of hydroxypropyl-β-cyclodextrin, 0.1 kg of fatty alcohol polyoxyethylene ether, 1 kg of isopropanol, 0.01 kg of citric acid, and the balance being deionized water. The active ingredient includes 20 kg of glycerol, 5 kg of ethanol, 1.6 kg of Abrus precatorius extract, 1.5 kg of methyl 1-hydroxypiperidine-2-carboxylate, 1.2 kg of linalool, and 14 kg of biosynthesized nano-silver.

[0030] The preparation process of Abrus precatorius extract is as follows: 5 kg of Abrus precatorius powder is stirred evenly in 50 L of 90% ethanol aqueous solution at 45℃ for 3 h, filtered to obtain a primary filtrate and a primary filter residue; the primary filter residue is stirred evenly in 50 L of 75% ethanol aqueous solution at 65℃ for 3 h, filtered to obtain a secondary filtrate and a secondary filter residue; the primary and secondary filtrates are combined, concentrated and dried to obtain Abrus precatorius extract.

[0031] The preparation method of biosynthesized silver nanoparticles is as follows: 9 kg of Fraxinus chinensis bark and 12 kg of Salix babylonica were mixed and pulverized to obtain powder. 450 L of water was added to the powder, and the mixture was extracted by ultrasonication. The supernatant was collected by centrifugation and freeze-dried to obtain the extract. Silver nitrate solution was added to the extract to obtain the reaction system. The pH of the reaction system was adjusted to 8, and the reaction was carried out at 60℃ for 15 min to obtain the final product. The final concentration of silver nitrate in the reaction system was 1 mM, and the final concentration of the extract was 30 mg / mL.

[0032] The preparation process of the surface deodorizing and disinfecting spray in Example 3 is as follows: The formulated amounts of acacia extract, linalool, biosynthesized nano-silver, hydroxypropyl-β-cyclodextrin, and citric acid are dissolved in water to obtain mixed liquid one. The formulated amounts of methyl 1-hydroxypiperidine-2-carboxylate, ethanol, glycerol, fatty alcohol polyoxyethylene ether, and isopropanol are mixed evenly to obtain mixed liquid two. Mixed liquid two is slowly added to mixed liquid one, stirred evenly, filtered, and then poured into an aerosol can. The valve is sealed, and dimethyl ether is added. The amount of dimethyl ether added is 60% of the total mass of the surface deodorizing and disinfecting spray in Example 3.

[0033] Comparative Example 1 The surface deodorizing disinfectant of Comparative Example 1 is largely the same as that of Example 1. The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 omits methyl 1-hydroxypiperidine-2-carboxylate.

[0034] Comparative Example 2 The surface deodorizing disinfectant of Comparative Example 2 is largely the same as that of Example 1. The difference between Comparative Example 2 and Example 1 is that Comparative Example 2 omits the use of biosynthesized nano-silver.

[0035] Comparative Example 3 The surface deodorizing disinfectant of Comparative Example 3 is largely the same as that of Example 1. The difference between Comparative Example 3 and Example 1 is that the white willow is omitted in Comparative Example 3 and replaced with the same mass of Qinpi.

[0036] Comparative Example 4 The surface deodorizing disinfectant of Comparative Example 4 is largely the same as that of Example 1. The difference between Comparative Example 4 and Example 1 is that Comparative Example 4 omits the Qinpi (a type of bark) and replaces it with the same mass of Bailiu (another type of bark).

[0037] Comparative Example 5 The surface deodorizing disinfectant of Comparative Example 5 is largely the same as that of Example 1. The difference between Comparative Example 5 and Example 1 is that the amount of methyl 1-hydroxypiperidine-2-carboxylate added in Comparative Example 5 is 2 kg.

[0038] Experimental Example 1 Antibacterial performance test According to Appendix C of GB / T15979-2012 "Hygienic Standard for Disposable Sanitary Products", the microbial strains are: Escherichia coli, Candida albicans, Staphylococcus aureus and Pseudomonas aeruginosa. The test conditions are as per Appendix C4. The test liquid is a 1:100 dilution of the sample. Examples 1-3 and Comparative Examples 1-5 were tested, and the test results are shown in Table 1.

[0039] Table 1. Antibacterial performance tests of disinfectants in Examples 1-3 and Comparative Examples 1-5

[0040] As shown in Table 1, the antibacterial performance of Comparative Example 5 was significantly lower than that of Examples 1-3, indicating that the active components can only exert a synergistic antibacterial effect under specific ratios. The antibacterial effects of Comparative Examples 1 and 2 were significantly weaker than those of Examples 1-3, confirming that the combination of methyl 1-hydroxypiperidine-2-carboxylate and biosynthesized nanosilver is the key bactericidal component.

[0041] Experimental Example 2 Skin irritation test Twenty-four guinea pigs were used (three guinea pigs per group for Examples 1-3 and Comparative Examples 1-5). Twenty-four hours before the experiment, the hair on both sides of the spine on the back of the guinea pigs was removed with a depilatory agent (without damaging the skin). This area was used as the test and observation site. The hair removal area was approximately 3 cm × 3 cm on both the left and right sides. 0.5 mL of the undiluted solution from Examples 1-3 and Comparative Examples 1-5 was applied directly to one side of the intact skin (2.5 cm × 2.5 cm), then covered with a layer of non-irritating plastic film or oil paper, and secured with non-irritating adhesive tape. The other side of the skin served as a blank control. The application time was 4 hours. After the experiment, the residual undiluted solution was removed with warm water. Local skin reactions were observed 1 hour, 24 hours, and 48 hours after removing the undiluted solution. Details are shown in Table 2.

[0042] According to the "Disinfection Technical Specifications" (2002), a complete skin irritation test was scored using the skin irritation reaction intensity scale: no erythema - 0 points, mild erythema - 1 point (barely visible), obvious erythema - 2 points, moderate to severe erythema - 3 points, purplish-red erythema with eschar formation - 4 points; no edema - 0 points, mild edema - 1 point (clearly defined skin elevation), moderate edema - 2 points (edema elevation of about 1 mm), severe edema - 3 points (edema elevation of more than 1 mm, with an expanded area), and extreme edema - 4 points (elevation of more than 1 mm, with a wide area). The intensity of skin irritation can be evaluated based on the total score of erythema and edema. Specific evaluation criteria may vary depending on different test requirements or institutions, but they can generally be divided as follows: no irritation - total score between 0 and 0.4 points, mild irritation - total score between 0.5 and 1.9 points, moderate irritation - total score between 2.0 and 5.9 points, and strong irritation - total score between 6.0 and 8.0 points.

[0043] Table 2 Skin irritation intensity test of disinfectants in Examples 1-3 and Comparative Examples 1-5

[0044] Table 2 shows the skin irritation results, with Comparative Example 5 exhibiting moderate irritation. As can be seen from Tables 1 and 2, only when the active ingredients are in a specific ratio can synergistic antibacterial activity be maintained while avoiding skin irritation.

[0045] Experimental Example 3 Odor removal test Odor removal tests were conducted using the surface deodorizing disinfectant solutions from Examples 1-3 and Comparative Examples 1-5. The specific method was as follows: At a distance of 10-20 cm from the odor substance, the spray nozzle was pressed and sprayed evenly 3-5 times, with a single spray amount of 0.10-0.12 g. Records were recorded after each spraying, and the odor removal effect was tested after 30 minutes. The test results are shown in Table 3. Odor intensity was rated as follows: no odor - 1, slight odor - 2, odorous but not irritating - 3, irritating odor - 4, strong irritating odor - 5, unbearable odor - 6.

[0046] Table 3. Odor removal test results of disinfectant solutions in Examples 1-3 and Comparative Examples 1-5

[0047] As shown in Table 3, the deodorization effects of Examples 1-3 are significantly better than those of Comparative Examples 1-5. Comparative Example 1 has the weakest deodorization effect, indicating that methyl 1-hydroxypiperidine-2-carboxylate can effectively remove odors from the human body, toilets, and garbage by combining with other substances in the active ingredient.

[0048] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the content of the present invention's specification shall also be included within the scope of protection of the present invention.

Claims

1. A surface deodorizing disinfectant, characterized in that, By mass percentage, it includes the following components: 0.1-10% active ingredient, 0.5-5% deodorizing synergist, 0.1-3% surfactant, 1-10% solvent, 0.01-0.05% pH adjuster, and the balance being deionized water; The active components, calculated by weight, include 3-20 parts glycerol, 5-30 parts ethanol, 1-2 parts Abrus precatorius extract, 0.8-1.5 parts methyl 1-hydroxypiperidine-2-carboxylate, 0.5-5 parts linalool, and 10-15 parts biosynthesized nano-silver.

2. The surface deodorizing disinfectant according to claim 1, characterized in that, The preparation method of the Abrus precatorius extract is as follows: Abrus precatorius powder is stirred evenly in a 90% (v / v) ethanol aqueous solution, stirred at 40-50°C for 2-5 h, filtered to obtain a primary filtrate and a primary filter residue; the primary filter residue is stirred evenly in a 75% (v / v) ethanol aqueous solution, stirred at 60-70°C for 2-5 h, filtered to obtain a secondary filtrate and a secondary filter residue; the primary and secondary filtrates are combined, concentrated and dried to obtain the Abrus precatorius extract.

3. The surface deodorizing disinfectant according to claim 1, characterized in that, The preparation method of the biosynthetic nano-silver is as follows: Fraxinus bark and white willow are mixed and pulverized to obtain powder. Water is added to the powder, ultrasonic extraction is performed, and the supernatant is collected by centrifugation. The supernatant is then freeze-dried to obtain an extract. Silver nitrate solution is added to the extract to obtain a reaction system. The reaction is carried out at 55-60 °C for 15-30 min to obtain the nano-silver.

4. The surface deodorizing disinfectant according to claim 3, characterized in that, The mass ratio of Qinpi (Fraxinus bark) to Bailiu (White Willow) is 3:3-5; 20-30 mL of water is added for each gram of the powder.

5. The surface deodorizing disinfectant according to claim 3, characterized in that, The final concentration of silver nitrate in the reaction system is 1–2 mM, and the final concentration of the extract is 10–30 mg / mL.

6. The surface deodorizing disinfectant according to claim 3, characterized in that, The pH of the reaction system is 7-8.

7. The surface deodorizing disinfectant according to claim 1, characterized in that, The active components, calculated by weight, include 3-10 parts glycerol, 10-30 parts ethanol, 1-2 parts Abrus precatorius extract, 0.8-1.2 parts methyl 1-hydroxypiperidine-2-carboxylate, 0.5-5 parts linalool, and 12-15 parts biosynthesized nano-silver.

8. The surface deodorizing disinfectant according to claim 1, characterized in that, The deodorizing synergist is cyclodextrin, the surfactant is a nonionic surfactant, the solvent is isopropanol, and the pH adjuster is citric acid or sodium citrate.

9. A surface deodorizing and disinfecting spray, characterized in that, It includes a propellant and the surface deodorizing disinfectant as described in any one of claims 1 to 8.

10. A method for preparing a surface deodorizing and disinfecting spray as described in claim 9, characterized in that, The process includes the following steps: dissolving the prescribed amounts of Abrus precatorius extract, linalool, biosynthetic nano-silver, deodorizing synergist, and pH adjuster in water to obtain mixed liquid one; mixing the prescribed amounts of methyl 1-hydroxypiperidine-2-carboxylate, ethanol, glycerol, surfactant, and solvent evenly to obtain mixed liquid two; slowly adding mixed liquid two to mixed liquid one, stirring evenly, filtering, filling into an aerosol can, sealing the valve, and filling with propellant.

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