An air freshener for removing odor and a method for preparing the same

Abstract

The application relates to the field of air purification, and particularly discloses a deodorizing air freshener and a preparation method thereof. The deodorizing air freshener comprises the following raw materials in percentage by weight: a deodorizing agent 2-10%, edible alcohol 10-20%, edible essence 0.1-2%, a propellant 0.1-5%, and the balance of pure water; the deodorizing agent comprises the following raw materials in percentage by weight: tea seed oil 13-17%, amino acid 20-30%, an adsorbent 10-20%, soybean seed extract 5-10%, a water-soluble zinc salt 2-5%, and water 30-40%. The deodorizing air freshener is green, environment-friendly, non-toxic, harmless, and free of secondary pollution, has high formaldehyde removal efficiency, and has the advantages of efficient purification, rapid deodorization, safety and no stimulation.

Description

Technical Field

[0001] This application relates to the field of air purification technology, and more specifically, to an odor-removing air freshener and its preparation method. Background Technology

[0002] With the improvement of people's living standards, interior decoration has become widespread in both urban and rural areas. However, various decoration materials used, such as plywood, paint, plastic products, and flooring, contain volatile harmful gases to varying degrees. The main toxic and harmful gases in indoor air pollution are formaldehyde, ammonia, and benzene. Indoor pollution has become a killer of human health.

[0003] Currently, most deodorizing and air fresheners on the market are processed separately, and they often rely on the adsorption properties of certain substances or use fragrance ingredients to mask odors, creating the illusion of removing formaldehyde or other unpleasant smells. For example, the invention patent document with application number CN031353835 discloses an air disinfecting and sterilizing freshener composed of the following ingredients by weight percentage: disinfectant 0.01%–2%, nonionic surfactant 1.5%–3%, polyol 1%–4%, natural organic acid 0.1%–1%, fragrance 0.3%–0.7%, emulsifying dispersant 0.3%–0.7%, plant ethanol extract 1%–2%, light-protecting stabilizer 0–0.4%, ethanol 0–4%, and water 82.2%–95.79%.

[0004] The aforementioned air fresheners contain surfactants, plant extracts, and fragrances. Surfactants can adsorb some odor molecules, but their adsorption and purification efficiency is low and they cannot completely eliminate odor molecules. The active ingredients in plant extracts can complex with odor molecules or produce a slight decomposition reaction, but they have drawbacks such as slow odor removal rate and low efficiency. Fragrance masking technology only uses a new scent to cover up unpleasant odors and does not have the effect of eliminating odors. Therefore, when air fresheners are used for indoor air purification and odor removal, not only are harmful and unpleasant odors such as formaldehyde, hydrogen sulfide, ammonia, and amines released into the space not removed, but harmful substances such as fragrances (most of which are derivatives of benzene) are absorbed into the human body, actually increasing the amount of harmful substances. Summary of the Invention

[0005] In order to eliminate odors at the source and improve the formaldehyde removal efficiency and durability of air fresheners, this application provides an odor-removing air freshener and its preparation method.

[0006] In a first aspect, this application provides an odor-removing air freshener, employing the following technical solution:

[0007] An air freshener for deodorizing, comprising the following raw materials by weight percentage: 2-10% deodorizing agent, 10-20% edible alcohol, 0.1-2% edible flavoring, 0.1-5% propellant, and the balance being pure water;

[0008] The deodorizing agent contains the following raw materials in weight percentage: 13-17% tea seed oil, 20-30% amino acids, 10-20% adsorbent, 5-10% soybean seed extract, 2-5% water-soluble zinc salt, and 30-40% water.

[0009] By adopting the above technical solution, an odor remover is prepared using amino acids, adsorbents, soybean seed extract, and tea seed oil. Tea seed oil contains various active ingredients, such as squalene and vitamin E, which have antioxidant properties. This helps protect the adsorbent material from oxidative damage, maintain its adsorption and decomposition of formaldehyde, and reduce the impact of the storage environment on the air freshener. Moreover, tea seed oil has strong permeability, which helps the effective ingredients in the odor remover to better penetrate into the treated material, improving adsorption efficiency. Certain components in soybean seed extract, such as isoflavones, have specific chemical structures that can provide additional adsorption sites, increase the interaction between formaldehyde molecules and the adsorbent, and thus improve the adsorption capacity. Furthermore, phytoestrogens and other components in soybean seed extract help enhance the stability of the odor remover, allowing it to maintain good adsorption performance under different environments. Tea seed oil and soybean seed extract are natural plant ingredients, safe and non-toxic, and will not cause harm to the human body or the environment.

[0010] The amino group in amino acid molecules can react with formaldehyde to produce hydroxyl derivatives and water. This not only effectively removes formaldehyde, but the resulting products are also non-toxic, harmless, and environmentally friendly, without causing secondary pollution. Water-soluble zinc salts have a strong ability to deodorize and remove odors. They can permanently remove harmful substances by chemically bonding with odor-causing factors such as formaldehyde and through oxidation-reduction reactions. In addition, water-soluble zinc salts have good water solubility and biodegradability, making them relatively safe and environmentally friendly.

[0011] Adsorbents typically have a large specific surface area and abundant pore structure, enabling them to efficiently adsorb formaldehyde molecules and odorous gases from the air. Through physical adsorption, formaldehyde molecules are fixed on the surface of the packing material, thereby achieving the purpose of purifying the air.

[0012] Therefore, by using ingredients such as amino acids, tea seed oil, adsorbents, and soybean seed extract as raw materials for deodorizers, the deodorizers made can eliminate odors at the source, achieve deodorization in a very short time, and the ingredients are non-toxic, harmless, and will not cause secondary indoor pollution.

[0013] Optionally, the deodorizing air freshener comprises the following raw materials in weight percentage: 10% deodorizer, 10% edible alcohol, 2% edible flavoring, 5% propellant, with the balance being pure water, and the deodorizer comprises the following raw materials in weight percentage: 16% tea seed oil, 20% amino acids, 20% adsorbent, 8% soybean seed extract, 4% water-soluble zinc salt, and 31% water.

[0014] Optionally, the mass ratio of amino acids to adsorbent in the deodorizing agent is 1:1.

[0015] By adopting the above technical solution and using appropriate proportions of amino acids and adsorbents, it is possible to adsorb and decompose harmful and odorous gases such as formaldehyde, thereby achieving a better air purification effect.

[0016] Optionally, the mass ratio of tea seed oil to soybean seed extract in the deodorizing agent is 1.75-2:1.

[0017] By adopting the above technical solution, the natural antioxidants contained in tea seed oil, such as tea polyphenols, have strong reducing properties and can undergo an oxidation-reduction reaction with formaldehyde, converting it into harmless substances. Furthermore, tea seed oil's good permeability and adsorption properties allow it to penetrate into the material, adsorbing and removing formaldehyde. Soybean seed extract contains soy protein, soy isoflavones, and other substances with certain active amino and hydroxyl functional groups, which can undergo nucleophilic addition reactions with the carbonyl groups in formaldehyde to generate stable addition products, thereby reducing the formaldehyde concentration. The above-mentioned amounts of tea seed oil and soybean seed extract can work synergistically, with their active ingredients complementing and enhancing each other. Tea seed oil is mainly responsible for reducing and adsorbing formaldehyde, while soybean seed extract mainly reduces its concentration through addition reactions with formaldehyde. This synergistic effect can more comprehensively remove formaldehyde from indoor air and improve the purification effect.

[0018] Optionally, the deodorizing agent contains tea seed oil and soybean seed extract in a mass ratio of 2:1.

[0019] By adopting the above technical solution, the more precise addition of tea seed oil and soybean seed extract can achieve better adsorption and elimination of formaldehyde.

[0020] Optionally, the amino acid is at least one selected from methionine, lysine, glutamic acid, threonine, and tyrosine.

[0021] By employing the above technical solutions, methionine exhibits excellent formaldehyde capture effects, reacting chemically with formaldehyde to form stable compounds, thereby fixing the formaldehyde and preventing its release into the air. Lysine possesses strong adsorption capacity, adsorbing formaldehyde molecules from the air onto its surface, thus purifying the air and effectively adsorbing and reducing formaldehyde release. Glutamic acid, through contact with formaldehyde, promotes its conversion into harmless substances while releasing minimal secondary pollution. Tyrosine, through an electrochemical reaction, reduces formaldehyde to methanol, achieving the goal of capturing and eliminating formaldehyde.

[0022] Optionally, the amino acids include methionine and lysine in a mass ratio of 1:1.

[0023] By adopting the above technical solution, methionine can react chemically with formaldehyde, thereby effectively fixing formaldehyde, preventing its release, and reducing its concentration. Lysine has a strong adsorption capacity. The two work synergistically. Methionine first reacts with formaldehyde to form a stable compound, reducing the concentration of free formaldehyde, while lysine further captures and fixes residual formaldehyde molecules through adsorption, thereby enhancing the overall formaldehyde purification effect.

[0024] Optionally, the water-soluble zinc salt is selected from at least one of zinc sulfate, zinc chloride, zinc nitrate, zinc lactate, zinc amino acid, zinc ricinoleate, and zinc gluconate.

[0025] By employing the above-mentioned technical solutions, zinc amino acid reacts with odor-causing factors through chemical bonding, oxidation-reduction, and other chemical reactions, thereby achieving the effect of rapidly and permanently removing various odor molecules from the environment; zinc ricinoleate reacts with odor molecules (such as methanethiol, hydrogen sulfide, ammonia, etc.) to generate odorless zinc salt complexes, thus efficiently removing unpleasant odors and effectively preventing them from being emitted into the surrounding environment; zinc lactate and zinc sulfate can effectively react with harmful gases such as formaldehyde, reducing their concentration in the air; zinc chloride has good odor absorption capacity; and zinc gluconate, through its water solubility and chelating ability, can adsorb and neutralize odor molecules in the air, while also reacting with harmful gases such as formaldehyde, rapidly converting them into harmless substances, thereby purifying the air.

[0026] Optionally, the water-soluble zinc salt comprises zinc amino acid and zinc lactate in a mass ratio of 1:0.3-0.5.

[0027] By adopting the above technical solution, zinc amino acid has high activity and excellent deodorization effect, which can quickly remove formaldehyde and other harmful substances in the air and generate non-toxic and harmless hydroxyl derivatives and water. Zinc lactate has good water solubility and chelating ability, which can adsorb and neutralize odor molecules and other harmful substances. Zinc amino acid removes formaldehyde directly through chemical reaction, while zinc lactate reduces the release and diffusion of formaldehyde through adsorption and chelation. The two have complementary mechanisms, thus producing a certain synergistic effect.

[0028] Optionally, the edible flavoring is at least one of orange flavoring, apple flavoring, mango flavoring, and strawberry flavoring.

[0029] Optionally, the adsorbent is polyacrylonitrile-based carbon nanofibers supported on porous calcium phosphate.

[0030] By adopting the above technical solution, using polyacrylonitrile as the substrate of carbon nanofibers, carbon nanofibers are obtained. These are the third form of carbon material after powdered and granular materials. Carbon nanofibers have a large specific surface area, abundant and well-developed pore structure, small pore size, narrow pore size distribution, large adsorption capacity, and fast adsorption speed, thus exhibiting superior adsorption performance. They can effectively remove volatile harmful gases from the air and also have a good removal effect on inhalable particles. However, they easily reach adsorption saturation, which may cause secondary pollution. Therefore, porous calcium phosphate is loaded onto the carbon nanofibers. Porous calcium phosphate has a high specific surface area and a special physical structure, enabling it to adsorb and remove odor molecules from the air, showing good adsorption effects on formaldehyde and odors, thereby increasing the adsorption capacity of carbon nanofibers and improving air quality.

[0031] Optionally, the preparation method of the polyacrylonitrile-based carbon nanofibers supported on porous calcium phosphate is as follows: calcium hydroxide is added to water with a mass of 2, stirred and dispersed, then phosphoric acid is added, stirred evenly, then calcium carbonate is added, stirred and dispersed to obtain the treatment solution.

[0032] Polyacrylonitrile nanofibers were immersed in a treatment solution, filtered, pre-oxidized by heating, carbonized by heating again, cooled to room temperature, and ground to a particle size of <200 mesh.

[0033] By adopting the above technical solution, calcium hydroxide and phosphoric acid are used as raw materials for calcium phosphate, and calcium carbonate is used as a pore-forming agent. Under the high temperature conditions of carbonation, calcium carbonate is decomposed to produce carbon dioxide and calcium oxide. The carbon dioxide gas released by the reaction has the function of forming pores, while calcium oxide can increase the calcium-to-phosphorus ratio of porous calcium phosphate. It can be used as an additive for calcium phosphate sintering, forming a solid solution with calcium phosphate, preventing crystal transformation, inhibiting grain growth, making the porous calcium phosphate particles smaller, increasing the specific surface area, and improving the adsorption effect of odor gases.

[0034] Optionally, the raw materials for the polyacrylonitrile-based carbon nanofibers include polyacrylonitrile and cobalt acetate in a mass ratio of 1:0.05-0.125.

[0035] By employing the above-mentioned technical solution, cobalt acetate, after being mixed with polyacrylonitrile and electrospun, can form a cobalt catalyst during the pre-oxidation and carbonization of polyacrylonitrile nanofibers. This catalyst exhibits good catalytic stability, while the polyacrylonitrile nanofibers undergo cyclization, dehydrogenation, and oxidation. During this process, some non-carbon elements, such as hydrogen and oxygen, are removed, forming carbon-based nanofibers. However, a certain amount of nitrogen is still present, which is beneficial for the dispersion and anchoring of cobalt. The graphite carbon layer surrounding the cobalt, combined with nitrogen-doped atoms, forms catalytic active centers conducive to oxygen molecule activation, thereby improving the catalytic and oxidation efficiency of the material for gases such as formaldehyde. Therefore, cobalt acetate can work in conjunction with nitrogen- and carbon-containing nanofibers formed by polyacrylonitrile. The high specific surface area and microporous structure are beneficial for the transport of substances and the exposure of active sites during the formaldehyde reaction, thus promoting the catalytic performance of gases such as formaldehyde and preventing the desorption of formaldehyde and other substances adsorbed onto porous calcium phosphate supported on polyacrylonitrile nanofibers.

[0036] Optionally, the propellant is one of nitrogen, propane, n-butane, isobutane, and dimethyl ether.

[0037] Secondly, this application provides a method for preparing an odor-removing air freshener, employing the following technical solution:

[0038] A method for preparing an odor-removing air freshener includes the following steps:

[0039] Add edible alcohol, deodorizing agent and edible flavoring to the reaction vessel in sequence, stir at 50-60 r / min until completely dissolved to obtain the base solution;

[0040] Add pure water to the base solution and stir at 50-60 r / min for 10-12 min to obtain the material solution;

[0041] After the liquid material passes the test, it is passed through a 200-mesh screen, filled, sealed with an aerosol valve, and propellant is injected to obtain the finished product.

[0042] By adopting the above technical solution, the formula is simple and easy to operate, with high cost performance. The amino acid deodorizer is well compatible with water and propellant, effectively removing odor molecules such as formaldehyde, acetaldehyde, toluene, amines (nicotine in cigarettes), sulfur-containing compounds (allicin in garlic and onions), and acids (isovaleric acid and butyric acid in human sweat). This invention has a good deodorizing effect, with a measured acetaldehyde removal rate of over 90% and an ammonia removal rate of over 98%. It can be used for air purification in environments such as new cars, newly renovated rooms, new wardrobes, and offices. The water-based formula eliminates odors at the source, achieving deodorization in a very short time, and is highly efficient and long-lasting.

[0043] In summary, this application has the following beneficial effects:

[0044] 1. Since the deodorizer in this application uses amino acids as the main component, and is compounded with adsorbents, tea seed oil and other ingredients to obtain a new type of deodorizing and formaldehyde-removing agent, the ingredients are non-toxic and harmless, and will not produce secondary indoor pollution. Through adsorption, penetration and other effects, the surface activity is increased, so that the active ingredients can comprehensively and quickly capture volatile pollutants and odor gases such as formaldehyde, sulfides, benzene series and ammonia, and complex and lock the gases, and then completely decompose them.

[0045] 2. In this application, porous calcium phosphate supported on polyacrylonitrile-based carbon nanofibers is preferably used as an adsorbent, which can increase the adsorption capacity for gases such as formaldehyde, accelerate the purification and decomposition rate, and improve the purification efficiency. At the same time, cobalt acetate is used in the preparation of polyacrylonitrile nanofibers. After pre-oxidation and treatment, polyacrylonitrile-based carbon nanofibers containing cobalt catalyst can be obtained, thereby effectively catalyzing the degradation of adsorbed gases such as formaldehyde, improving the degradation efficiency, and improving air quality.

[0046] 3. The ingredients in this application are non-toxic, harmless, mild and non-irritating, improve indoor air quality, and will not produce secondary pollution. The acute oral toxicity test results show that the LDm of the product in SPF-grade KM mice is greater than 5000 mg / kg·BW, which is practically non-toxic. Multiple skin irritation tests show that the product in this application is non-irritating in multiple skin irritation tests on New Zealand rabbits. Detailed Implementation

[0047] The following embodiments provide a further detailed description of this application.

[0048] Examples of Adsorbent Preparation 1-5

[0049] Preparation Example 1: (1) 2g of polyacrylonitrile was dissolved in 18g of DMF to obtain a polyacrylonitrile solution. The polyacrylonitrile solution was used as a spinning solution for electrospinning. The solution was vacuum dried at 50°C overnight. The solvent DMF was removed to obtain polyacrylonitrile nanofibers. The receiving distance during electrospinning was 18cm, the positive electrode voltage was 20kV, the roller speed was 140r / min, the ambient temperature was 25°C, the humidity was 25%, and the feed speed was 0.08mm / min. The polyacrylonitrile was selected from Guangdong Wengjiang Chemical Reagent, model PA98862, with a molecular weight of 150000.

[0050] (2) Add 0.03 mol of calcium hydroxide to twice its mass of water, stir and disperse at 1000 r / min for 30 min, add phosphoric acid dropwise at 600 r / min, stir for 30 min, add calcium carbonate, disperse at 1000 r / min for 30 min to obtain the treatment solution, the molar ratio of phosphoric acid to calcium hydroxide is 3:3, and the amount of calcium carbonate is 17% of the total weight of calcium hydroxide and phosphoric acid; (3) Place polyacrylonitrile nanofibers in the treatment solution, soak at room temperature for 24 h, filter and place in a muffle furnace, introduce oxygen, heat to 280℃ at 1℃ / min, keep at temperature for 2 h, cool naturally to room temperature, then place in a quartz boat, place the quartz boat in a tube furnace, heat to 650℃ at 1℃ / min under nitrogen atmosphere, keep at temperature for 1 h, then heat to 950℃ at 1℃ / min, carbonize for 60 min, cool to room temperature, and grind to <200 mesh.

[0051] Preparation Example 2: (1) 2g of polyacrylonitrile was dissolved in 18g of DMF to obtain a polyacrylonitrile solution. The polyacrylonitrile solution was used as a spinning solution for electrospinning. The solution was dried under vacuum at 50°C overnight to remove the solvent DMF and obtain polyacrylonitrile nanofibers. The receiving distance during electrospinning was 18cm, the positive electrode voltage was 20kV, the roller speed was 140r / min, the ambient temperature was 25°C, the humidity was 25%, and the feed speed was 0.08mm / min. The polyacrylonitrile was selected from Guangdong Wengjiang Chemical Reagent, model PA98862, with a molecular weight of 150000.

[0052] (2) Place the polyacrylonitrile nanofibers into a muffle furnace, introduce oxygen, raise the temperature to 280°C at 1°C / min, hold the temperature for 2 hours, cool naturally to room temperature, then place them in a quartz boat, place the quartz boat into a tube furnace, raise the temperature to 650°C at 1°C / min under a nitrogen atmosphere, hold for 1 hour, then raise the temperature to 950°C at 1°C / min, carbonize for 60 minutes, cool to room temperature, and grind to <200 mesh.

[0053] Preparation Example 3: (1) 0.03 mol of calcium hydroxide was added to twice its mass of water, and after stirring and dispersing at 1000 r / min for 30 min, phosphoric acid was added dropwise at 600 r / min, and after stirring for 30 min, calcium carbonate was added and dispersed at 1000 r / min for 30 min to obtain the treatment solution. The molar ratio of phosphoric acid to calcium hydroxide was 3:3, and the amount of calcium carbonate used was 17% of the total weight of calcium hydroxide and phosphoric acid.

[0054] (2) The treatment liquid was dried in an oven at 120°C until it was no longer flowing. Then it was placed in a muffle furnace, oxygen was introduced, and the temperature was increased to 280°C at 1°C / min. The temperature was kept constant for 2 hours, and the temperature was increased to 950°C and kept for 60 minutes.

[0055] Preparation Example 4: The difference from Preparation Example 1 is that the spinning solution also contains a cobalt acetate solution. The cobalt acetate solution is prepared by mixing 0.1 g of cobalt acetate and 2 mL of DMF. The mass ratio of cobalt acetate to polyacrylonitrile is 0.05:1. The cobalt acetate solution is added to the polyacrylonitrile solution and homogenized for 30 min to obtain the spinning solution.

[0056] Preparation Example 5: The difference from Preparation Example 1 is that the spinning solution also contains a cobalt acetate solution. The cobalt acetate solution is prepared by mixing 0.25g of cobalt acetate and 5ml of DMF. The mass ratio of cobalt acetate to polyacrylonitrile is 0.125:1. The cobalt acetate solution is added to the polyacrylonitrile solution and homogenized for 30min to obtain the spinning solution.

[0057] Example

[0058] Example 1: An odor-removing air freshener, with the following raw material percentages: 10% odor remover, 10% edible alcohol, 2% edible flavoring, and 5% propellant, supplemented with pure water to 100%. The propellant is nitrogen, the edible alcohol concentration is 95%, and the edible flavoring is apple flavoring. The raw material amounts of the odor remover are shown in Table 1. In Table 1, the adsorbent is activated carbon powder, the water-soluble zinc salt includes zinc amino acid and zinc lactate in a mass ratio of 1:0.5, the amino acid includes methionine and lysine in a mass ratio of 1:1, and the soybean seed extract is selected from Xi'an Feida Biotechnology, with a soybean isoflavone content of 40%.

[0059] The preparation method of the above-mentioned odor-removing air freshener includes the following steps:

[0060] Tea seed oil and soybean seed extract were stirred at 500 r / min for 30 min to prepare solution A; amino acids, water-soluble zinc salt, adsorbent and water were mixed and stirred at 500 r / min for another 30 min to prepare solution B; solution A was added to solution B and stirred at 2000 r / min for 10 min to prepare deodorizer.

[0061] Add edible alcohol, deodorizing agent and edible flavoring to the reaction vessel in sequence, stir at 50 r / min until completely dissolved to obtain the base solution;

[0062] Add sterile pure water to the base solution and continue stirring at 50 r / min for 10 min to obtain the material solution;

[0063] After the liquid material passes the test, a 200-mesh screen is used to fill it into an aerosol can. The aerosol valve is then installed, sealed, and nitrogen is introduced to obtain the finished product.

[0064] Table 1. Raw material formulations of the deodorizing agents in Examples 1-6

[0065] wt / % Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Tea seed oil 16 13 17 15.2 14 16 amino acids 20 25 30 20 20 30 Adsorbent 20 15 10 20 20 10 Soybean seed extract 8 10 5 8 8 8 Water-soluble zinc salts 4 2 5 4 4 4 water 36 35 33 32.8 34 32

[0066] Example 2: An odor-removing air freshener, with the following raw material percentages: 10% odor remover, 13% edible alcohol, 1% edible flavoring, and 3% propellant, supplemented with pure water to 100%. The propellant is nitrogen, the edible alcohol concentration is 95%, and the edible flavoring is apple flavoring. The raw material amounts of the odor remover are shown in Table 1. In Table 1, the adsorbent is activated carbon powder, the water-soluble zinc salt includes zinc amino acid and zinc lactate in a mass ratio of 1:0.5, the amino acid includes methionine and lysine in a mass ratio of 1:1, and the soybean seed extract is selected from Xi'an Feida Biotechnology, with a soybean isoflavone content of 40%.

[0067] The preparation method of the above-mentioned odor-removing air freshener includes the following steps:

[0068] Tea seed oil and soybean seed extract were stirred at 500 r / min for 30 min to prepare solution A; amino acids, water-soluble zinc salt, adsorbent and water were mixed and stirred at 500 r / min for another 30 min to prepare solution B; solution A was added to solution B and stirred at 2000 r / min for 10 min to prepare deodorizer.

[0069] Add edible alcohol, deodorizing agent and edible flavoring to the reaction vessel in sequence, stir at 60 r / min until completely dissolved to obtain the base solution;

[0070] Add sterile pure water to the base solution and continue stirring at 60 r / min for 12 min to obtain the material solution;

[0071] After the liquid material passes the test, a 200-mesh screen is used to fill it into an aerosol can. The aerosol valve is then installed, sealed, and nitrogen is introduced to obtain the finished product.

[0072] Examples 3-6: An odor-removing air freshener, which differs from Example 1 in that the amount of raw materials used in the odor-removing agent is shown in Table 1.

[0073] Example 7: An odor-removing air freshener, which differs from Example 1 in that the water-soluble zinc salt is zinc lactate.

[0074] Example 8: An odor-removing air freshener, which differs from Example 1 in that the water-soluble zinc salt is zinc sulfate.

[0075] Example 9: An odor-removing air freshener, which differs from Example 1 in that the amino acid in both examples is methionine.

[0076] Example 10: An odor-removing air freshener, which differs from Example 1 in that the amino acid is glutamic acid.

[0077] Example 11: An odor-removing air freshener, which differs from Example 1 in that the adsorbent is polyacrylonitrile-based carbon nanofibers supported on porous calcium phosphate, and is prepared according to Example 1 of adsorbent preparation.

[0078] Example 12: An odor-removing air freshener, which differs from Example 1 in that the adsorbent is polyacrylonitrile-based carbon nanofibers, and is prepared by Example 2.

[0079] Example 13: An odor-removing air freshener, which differs from Example 1 in that the adsorbent is porous calcium phosphate and is prepared by Preparation Example 3.

[0080] Example 14: An odor-removing air freshener, which differs from Example 11 in that the adsorbent is polyacrylonitrile-based carbon nanofibers supported on porous calcium phosphate, and is prepared by Example 4.

[0081] Example 15: An odor-removing air freshener, which differs from Example 11 in that the adsorbent is polyacrylonitrile-based carbon nanofibers supported on porous calcium phosphate, and is prepared by Example 5.

[0082] Comparative Example

[0083] Comparative Example 1: An odor-removing air freshener, which differs from Example 1 in that water is used in an equal amount to replace tea seed oil in the adsorbent.

[0084] Comparative Example 2: An odor-removing air freshener, which differs from Example 1 in that an equal amount of soybean seed extract is used instead of tea seed oil in the adsorbent.

[0085] Comparative Example 3: An odor-removing air freshener, which differs from Example 1 in that an equal amount of tea seed oil is used instead of amino acids.

[0086] Comparative Example 4: An odor-removing air freshener, which differs from Example 1 in that it uses an equal amount of tea seed oil instead of water-soluble zinc salt.

[0087] Performance testing

[0088] The odor-removing air freshener prepared in Example 1 was subjected to acute oral toxicity tests and multiple skin irritation tests. The test methods are as follows:

[0089] I. Acute oral toxicity test

[0090] (1) Test substance: ① Test substance: the original deodorizing air freshener prepared in Example 1; ② Test solution: weigh 5g of the test substance, add sterile water to make up to 20ml, mix well and test.

[0091] (2) Experimental animals and housing environment: ① Experimental animals: SPF grade KM mice, 5 females and 5 males, weighing 18-22g; ② Feed source: feed was purchased from Guangdong Provincial Medical Experimental Animal Center; ③ Housing environment: temperature 20-26℃, relative humidity 40-70%.

[0092] (3) Methods: ① Test method: Chapter 6, Section 2 of the 2015 edition of the Cosmetic Safety Technical Specifications; ② Dosage level: According to the method requirements, the single-dose limit method was adopted (i.e., 10 animals were given a dose of 5000 mg / kg body weight orally).

[0093] (4) Experimental Procedure: Before the experiment, the experimental animals were fasted overnight, but water intake was not restricted. During the experiment, the animals were weighed, randomly divided into groups, and administered one oral gavage at a dose of 0.2 ml / 10 g body weight. Fasting continued for 3 hours after gavage, followed by a normal diet. Individual and comprehensive records were kept for each animal after administration, observing the signs of poisoning and mortality for 14 days. Animal weight was measured on days 0, 7, and 14 after administration.

[0094] (5) Result evaluation: LD50 is calculated based on the data and judged according to the oral toxicity classification table. If there is no death within 14 days after a single oral gavage dose of 5000 mg / kg·BW, it can be determined that the LD50 is greater than 5000 mg / kg·BW.

[0095] (6) The test results are shown in Table 2.

[0096] Table 2. Results of Acute Oral Toxicity Tests for Deodorizing Air Fresheners

[0097]

[0098] Note: No obvious symptoms of poisoning or death were observed in any of the test animals during the 14-day observation period.

[0099] (7) Conclusion: Under the conditions of this experiment, the acute oral LD50 of the test substance to SPF-grade KM mice is >5000 mg / kg·BW, which is practically non-toxic.

[0100] II. Repeated skin irritation tests

[0101] (1) Test substance: The air freshener product prepared in Example 1,

[0102] (2) Experimental animals and rearing environment: ① Experimental animals: ordinary grade New Zealand rabbits, 4 females, weight range 2-2.2kg; ② Animal source: experimental animals were provided by Guangdong Provincial Medical Experimental Animal Center (Sanshui Base); ③ Feed source: purchased from Guangdong Provincial Medical Experimental Animal Center; rearing environment: temperature 20-26℃, relative humidity 40-70%.

[0103] (3) Test method: Chapter 6, Section 4 of the 2015 edition of the "Cosmetic Safety Technical Specifications".

[0104] (4) Experimental procedure: 24 hours before the experiment, the hair on both sides of the spine on the back of the rabbit was shaved. The area of ​​hair removal was about 3cm × 3cm on each side. The next day, 0.5ml of the test substance was applied to the skin on one side, and the hairless skin on the other side served as a negative control. The application was carried out once a day for 14 consecutive days. Before each application, the residual test substance was removed with water, and the results were observed and scored 1 hour later.

[0105] (5) Results evaluation: Observe the results 24 hours after each application and score the skin reaction according to the skin irritation response rating scale. Calculate the average score per animal per day using the following formula and determine the skin irritation intensity according to the skin irritation intensity grading standard table: Average score per animal per day = [(ΣErythema and edema score) / Number of test animals] / 14.

[0106] (6) The test results are shown in Table 3.

[0107] Table 3 Results of multiple skin irritation tests on deodorizing air fresheners

[0108]

[0109]

[0110] (7) Conclusion: Under the conditions of this experiment, the test substance showed no irritation in multiple skin irritation tests on New Zealand rabbits.

[0111] The deodorizing air fresheners prepared in the examples and comparative examples were subjected to formaldehyde and ammonia removal tests. The test results are recorded in Table 4. The test methods are as follows:

[0112] 1. Acetaldehyde removal rate: 300ml of sample was evenly sprayed three times onto three sheets of paper, each 1m in size. 2 After air drying on the base paper, place it in a 1.5m... 3 The test was conducted inside the test chamber, with the chamber's circulating fan turned on during the test, which lasted for 24 hours.

[0113] 2. Ammonia removal rate: 300ml of sample was evenly sprayed three times onto three sheets of 1m size. 2 After air drying on the base paper, place it in a 1.5m... 3 The test was conducted inside the test chamber, with the chamber's circulating fan turned on during the test, which lasted for 24 hours.

[0114] 3. Formaldehyde removal rate: 300ml of sample was evenly sprayed three times onto three sheets of paper, each 1m in size. 2 After air drying on the base paper, place it in a 1.5m... 3The test was conducted inside the test chamber, with the chamber's circulating fan turned on during the test, which lasted for 24 hours.

[0115] Table 4. Purification Test Results of Deodorizing Air Fresheners

[0116]

[0117] As can be seen from the data in Examples 1-5 and Table 4, the deodorizing agent made by using a specific amount of raw materials and using edible alcohol, pure water and other solvents can achieve the air purification effect in a very short time, eliminate odors from the source, and the ingredients are non-toxic and harmless, and will not produce secondary pollution.

[0118] In Example 7, only zinc lactate was used as a water-soluble zinc salt, without the combination of zinc lactate and amino acid zinc. It can be seen that the purification effect of the deodorizing air freshener on aldehydes and ammonia is slightly reduced.

[0119] In Example 8, zinc sulfate was used as a water-soluble zinc salt. Compared with the combination of zinc lactate and zinc amino acid in Example 1, the deodorizing air freshener made by using zinc sulfate alone as a water-soluble zinc salt had a weaker purification effect on formaldehyde, acetaldehyde and ammonia.

[0120] In Example 9, methionine was used alone. Compared with Example 1, the deodorizing air freshener prepared in Example 8 had a reduced ability to purify and degrade harmful substances such as formaldehyde and acetaldehyde.

[0121] In Example 10, glutamic acid was used as the amino acid. Compared with methionine and lysine used in Example 1, the deodorizing air freshener prepared in Example 10 had a reduced ability to purify gases such as formaldehyde.

[0122] In Example 11, porous calcium phosphate supported on polyacrylonitrile-based carbon nanofibers was used as an adsorbent. Compared with activated carbon powder used as an adsorbent in Example 1, the deodorizing air freshener prepared in Example 11 had increased adsorption and degradation capabilities for gases such as formaldehyde and acetaldehyde.

[0123] In Example 12, polyacrylonitrile-based carbon nanofibers were used as adsorbents, and in Example 13, porous calcium phosphate was used as an adsorbent. As can be seen from the data in Table 4, Example 13 has a catalytic and degradation effect that is closer to that of Example 1, while the deodorizing air freshener in Example 12 has a significantly weakened ability to catalyze and degrade harmful gases.

[0124] In Examples 14 and 15, porous calcium phosphate was supported on polyacrylonitrile-based carbon nanofibers prepared in Examples 4 and 5, respectively. Cobalt acetate was also added during the preparation of polyacrylonitrile nanofibers. Compared with Example 11, the deodorizing air fresheners prepared in Examples 14 and 15 showed a significant increase in the purification and removal rate of polluting gases such as formaldehyde, acetaldehyde, and ammonia.

[0125] In Comparative Example 1, pure water was used to replace tea seed oil in the deodorizer. Compared with Example 1, the deodorizing air freshener prepared in Comparative Example 1 showed a significant reduction in its ability to purify formaldehyde, acetaldehyde, and ammonia.

[0126] In Comparative Example 2, soybean seed extract was used instead of tea seed oil. Compared with Example 1, the deodorizing air freshener product prepared in Comparative Example 2 had a slightly weaker ability to purify harmful gases such as formaldehyde.

[0127] In Comparative Example 3, an equal amount of camellia seed oil was used to remove amino acids, and in Comparative Example 4, an equal amount of camellia seed oil was used to replace water-soluble zinc salts. As can be seen from the data in Table 4, the deodorizing air fresheners prepared in Comparative Examples 3 and 4 showed a decrease in the purification and deodorization effects on gases such as formaldehyde.

[0128] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An odor-removing air freshener, characterized in that, The raw materials include the following weight percentages: deodorizer 2-10%, edible alcohol 10-20%, edible flavoring 0.1-2%, propellant 0.1-5%, and the balance being pure water; The deodorizing agent contains the following raw materials by weight percentage: 13-17% tea seed oil, 20-30% amino acids, 10-20% adsorbent, 5-10% soybean seed extract, 2-5% water-soluble zinc salt, and 30-40% water; The deodorizing agent contains tea seed oil and soybean seed extract in a mass ratio of 1.75-2:

1. The amino acid is at least one selected from methionine, lysine, glutamic acid, threonine, and tyrosine. The water-soluble zinc salt is selected from at least one of zinc sulfate, zinc chloride, zinc nitrate, zinc lactate, zinc amino acid, zinc ricinoleate, and zinc gluconate; The water-soluble zinc salt comprises zinc amino acid and zinc lactate in a mass ratio of 1:0.3-0.5; The adsorbent is porous calcium phosphate supported on polyacrylonitrile-based carbon nanofibers. The raw materials for the polyacrylonitrile-based carbon nanofibers include polyacrylonitrile and cobalt acetate in a mass ratio of 1:0.05-0.125; The propellant is one of nitrogen, propane, n-butane, isobutane, and dimethyl ether.

2. The method for preparing the odor-removing air freshener according to claim 1, characterized in that: Includes the following steps: Add edible alcohol, deodorizing agent and edible flavoring to the reaction vessel in sequence, stir at 50-60 r / min until completely dissolved to obtain the base solution; Add pure water to the base solution and stir at 50-60 r / min for 10-12 min to obtain the material solution; After the liquid material passes the test, it is passed through a 200-mesh screen, filled, sealed with an aerosol valve, and propellant is injected to obtain the finished product.

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