A plant deodorant and preparation method thereof

Abstract

The present invention relates to the technical field of deodorant, disclose a kind of plant deodorant and preparation method thereof, its raw material includes 10-20 parts of plant essential oil, 1-3 parts of pinene, 1-3 parts of sabinene, 1-3 parts of linalool, 1-3 parts of myrcene, 1-3 parts of α-terpineol, 5-8 parts of polyethylene glycol monooleate, 2-5 parts of preservative, 5-10 parts of core-shell nano microspheres, 70-80 parts of deionized water by weight; the core-shell nano microspheres are prepared by using nano zinc oxide particles as core layer and trivalent iron ions as shell layer. In the present invention, plant deodorant not only contains active ingredients reacting with odor molecules, but also converts malodorous substances into odorless substances, effectively improves deodorization efficiency, and purifies the environment; and the compounding of plant essential oil and spices makes the fragrance more fresh and natural, and can also improve the persistence of fragrance retention, and achieve the effect of efficient and rapid deodorization.

Description

Technical Field

[0001] The present invention relates to the technical field of deodorants, in particular to a plant deodorant and a preparation method thereof. Background Art

[0002] At present, the garbage deodorants available on the market mainly include chemical deodorants, microbial deodorants and plant deodorants. Chemical deodorants are expensive and easy to cause secondary pollution; although microbial deodorants are low-cost, they are difficult to achieve fast and efficient deodorization effects due to the difficulty of mixed fermentation of microorganisms, unstable products, and certain adaptability and growth cycles; plant deodorants refer to deodorants processed with natural plant extracts or natural plant extracts as the main raw materials. They are harmless and non-toxic to humans and animals, can be completely degraded by organisms, are non-toxic, and have no secondary pollution. The natural ingredients separated and extracted from natural plants have antibacterial, bactericidal and deodorizing effects, and can adsorb, cover, and decompose the odors of inorganic substances such as ammonia and hydrogen sulfide and organic substances such as low-molecular fatty acids, amines, aldehydes, ketones, ethers, and halogenated hydrocarbons, or collide with odor molecules and react to cause the odor molecules to change their original molecular structure and lose the odor, thereby achieving the effect of removing odors.

[0003] However, most of the existing plant deodorants are oils or juices extracted from plants with special fragrances, and are blended by adding essences and pigments. The smell is mainly diluted by the fragrance emitted from the deodorant, thereby covering people's sense of smell and achieving the illusion of no smell. For example, the Chinese invention patent with publication number CN112007195A discloses a plant deodorant, the formula ingredients include plant mixed essential oils, cosolvents, penetrants, emulsifiers, stabilizer pure water; the mass percentage of each component is: plant composite essential oil 3%-10%, cosolvent 2%-10%, penetrant 0.5%-10%, emulsifier 5%-15%, stabilizer 0.1%-2%, pure water 60%-85%. The deodorant has a low content of effective active ingredients and cannot deodorize fundamentally, and the deodorizing effect is poor. Therefore, it is urgent to develop a plant deodorant with low production cost, which can deodorize fundamentally by reacting with odor molecules, rather than deodorizing by masking method. It is efficient and fast. Summary of the invention

[0004] In order to solve the technical problem that plant deodorants cannot remove odors fundamentally, the present invention provides a plant deodorant and a preparation method thereof, which can not only release natural fragrance, but also contain effective ingredients that react with odor molecules to convert them into odorless substances, which can remove odors fundamentally and achieve the effect of efficient and rapid deodorization.

[0005] The specific technical scheme of the present invention is: a plant deodorant, wherein the raw materials thereof include, by weight, 10 to 20 parts of plant essential oil, 1 to 3 parts of pinene, 1 to 3 parts of sabinene, 1 to 3 parts of linalool, 1 to 3 parts of myrcene, 1 to 3 parts of α-terpineol, 5 to 8 parts of polyethylene glycol monooleate, 2 to 5 parts of preservatives, 5 to 10 parts of core-shell nano-microspheres, and 70 to 80 parts of deionized water; the core-shell nano-microspheres are prepared by using nano zinc oxide particles as the core layer and trivalent iron ions as the shell layer.

[0006] The plant essential oil is extracted from natural plants in the present invention, has no toxic and side effects on human body and animals, no secondary pollution, is non-toxic and harmless, and belongs to a pure natural environmentally friendly deodorizing product. The plant essential oil can emit a light floral fragrance and fruity fragrance, thereby weakening the odor of the odor. In addition, the compounding of several spices such as pinene, sabinene, linalool, myrcene, and alpha-terpineol makes the fragrance more fresh and natural, and can also improve the persistence of the fragrance. In addition, the core-shell nano microsphere can fundamentally remove the odor, and nano zinc oxide can adsorb odor molecules such as ammonia, hydrogen sulfide, formaldehyde, and mercaptan. After improving the adsorption of odor molecules, zinc oxide can also react with hydrogen sulfide in a non-catalytic gas-solid two-phase reaction, and hydrogen sulfide gas in the air can be removed, and trivalent iron ions can react with mercaptan to convert malodorous substances into odorless substances. Therefore, the plant deodorant can fundamentally deodorize by reacting with odor molecules while emitting a fresh, natural, and long-lasting fragrance, effectively improving the deodorization efficiency and purifying the environment.

[0007] Preferably, the plant essential oil is one or more of cinnamon oil, lemon oil, sweet orange oil and lime oil.

[0008] Preferably, the preservative is one or more of sodium benzoate, carbolic acid, methylchloroisothiazolinone and parabens.

[0009] Preferably, the method for preparing the core-shell nanospheres comprises the following steps:

[0010] (1) Add zinc sulfate to a potassium carbonate aqueous solution, stir at room temperature to obtain a suspension, centrifuge to obtain a precipitate I, then disperse it in an EDTA aqueous solution, ultrasonicate at 40-50° C. for 30-50 min, centrifuge and wash with water to obtain a precipitate II; dry and grind the precipitate II, disperse it in a mixed solvent of diethyl hydroxymethylphosphonate and vinyltrimethylsilane, stir and react at 300-350° C. for 1-2 h under an inert atmosphere, cool, add ether, filter the precipitate, wash with anhydrous ethanol, dry and grind to obtain nano zinc oxide particles;

[0011] (2) Dispersing nano zinc oxide particles in an aqueous solution of ferric sulfate, stirring and reacting at 30-40°C for 60-90 minutes, filtering, adding the precipitate to N,N-dimethylformamide, then adding thionyl chloride, heating to 40-45°C for 1-2 hours, and performing vacuum distillation after the reaction is completed; after cooling, adding the obtained product dropwise to a mixed solution of yucca saponin, dichloromethane, ethanol, and triethylamine, stirring and reacting for 30-60 minutes while adding dropwise, and then centrifuging, washing, and drying to obtain core-shell nanospheres.

[0012] The nano zinc oxide particles prepared by the present invention have a small particle size and a large specific surface area, and the surface is modified with EDTA, which can better complex trivalent iron ions as a core layer, improve binding and load uniformity. Moreover, after the carboxyl groups on EDTA are chlorinated to improve the reaction activity, they can better undergo grafting reaction with yucca saponin, so that many long branched chain structures are grafted on the surface of the nano zinc oxide particles. Yucca saponin is composed of sapogenins and sugars, uronic acid or other organic acids, and has a strong adsorption capacity for odor. It can not only combine with ammonia, but also combine with hydrogen sulfide or other organic gases, convert malodorous substances into odorless substances, and can effectively reduce the odor concentration. The long branched chain structure formed by yucca saponin can first combine with odor molecules, and coupled with the large specific surface area of ​​the nano zinc oxide particles and the further deodorizing effect of zinc oxide and trivalent iron ions, more efficient deodorization is achieved, and the deodorization rate is improved.

[0013] Preferably, in step (1), the molar ratio of zinc sulfate to potassium carbonate is 1-1.5:1; the concentration of the potassium carbonate aqueous solution is 0.2-0.4 mg / mL; the mass ratio of precipitate I to EDTA is 1:5-7, and the concentration of the EDTA aqueous solution is 2-3 mg / mL.

[0014] Preferably, in step (1), the mass ratio of the precipitate II to the mixed solvent is 0.1:8-12; and the mass ratio of the diethyl hydroxymethylphosphonate to vinyltrimethylsilane is 1:1-2.

[0015] Preferably, in step (2), the mass volume ratio of the nano zinc oxide particles to ferric sulfate is 1:4-5, the concentration of the ferrous nitrate aqueous solution is 8-10 mg / mL; the mass ratio of the nano zinc oxide particles to yucca saponin is 1:3-6.

[0016] Preferably, in step (2), the mass volume ratio of the precipitate, N,N-dimethylformamide and thionyl chloride is 1 g:150 mL:2-3 g; the mass volume ratio of the yucca saponin, dichloromethane, ethanol and triethylamine is 1 g:20-50 mL:5-15 mL:0.1-0.4 g.

[0017] In a second aspect, the present invention also provides a method for preparing the above-mentioned plant deodorant, comprising the following steps:

[0018] S1: Dispersing 5-10 parts of core-shell nanospheres in a mixture of 10-20 parts of plant essential oil and 2-4 parts of castor oil, and ultrasonicating for 20-30 minutes to obtain a mixture A;

[0019] S2: adding 1 to 3 parts of pinene, 1 to 3 parts of sabinene, 1 to 3 parts of linalool, 1 to 3 parts of myrcene, 1 to 3 parts of α-terpineol, and 2 to 5 parts of preservatives to 70 to 80 parts of deionized water, and stirring for 20 to 30 minutes to obtain a mixture B;

[0020] S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 5 to 8 parts of polyethylene glycol monooleate and continue stirring for 10 to 20 minutes to obtain a plant deodorant.

[0021] The core-shell nano-microspheres in the present invention are dispersed in the mixed oil to form an oil-coated structure. Yucca saponin has a fat-soluble group and can produce good affinity with oil substances. Adding a small amount of castor oil with a slightly larger specific gravity than plant essential oils is conducive to the formation of the oil-coated structure. Plant essential oils are all volatile oils, and castor oil is a slightly volatile oil. The oil-coated structure formed in this way can better expose the core-shell nano-microspheres when the mixed oil evaporates. When sprayed in the air or left to stand, the odorous substances have sufficient contact time with the core-shell nano-microspheres, which is conducive to better exerting its adsorption and decomposition of odor and improving deodorization efficiency. Moreover, mixing in steps can improve the dispersibility of the oil-coated structure and improve the stability of the plant deodorant.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) Plant essential oils are extracted from natural plants, have no toxic side effects on humans and animals, no secondary pollution, are non-toxic and harmless, and can have a light floral and fruity aroma. Combined with the compounding of spices, the fragrance is more fresh and natural, and can also improve the durability of the fragrance;

[0024] (2) The core-shell nanoparticles contain active ingredients that react with odor molecules, converting malodorous substances into odorless substances, effectively improving deodorization efficiency and purifying the environment;

[0025] (3) Through further optimization of the formula and preparation method, the plant deodorant can not only better exert the adsorption and decomposition effect of the active ingredients, thereby deodorizing fundamentally, but also emit a fresh, natural, and long-lasting fragrance, achieving the effect of efficient and rapid deodorization. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments.

[0027] Overall embodiment

[0028] A plant deodorant, the raw materials of which include 10-20 parts of plant essential oil, 1-3 parts of pinene, 1-3 parts of sabinene, 1-3 parts of linalool, 1-3 parts of myrcene, 1-3 parts of α-terpineol, 5-8 parts of polyethylene glycol monooleate, 2-5 parts of preservative, 5-10 parts of core-shell nano-microspheres, and 70-80 parts of deionized water by weight. The plant essential oil is one or more of cinnamon oil, lemon oil, sweet orange oil, and lime oil; the preservative is one or more of sodium benzoate, carbolic acid, methylchloroisothiazolinone, and parabens.

[0029] The preparation method of core-shell nanoparticles comprises the following steps:

[0030] (1) adding zinc sulfate to a potassium carbonate aqueous solution with a concentration of 0.2-0.4 mg / mL, wherein the molar ratio of zinc sulfate to potassium carbonate is 1-1.5:1, stirring at room temperature to obtain a suspension, centrifuging to obtain a precipitate I, and then dispersing it in an EDTA aqueous solution with a concentration of 2-3 mg / mL, wherein the mass ratio of the precipitate I to EDTA is 1:5-7, ultrasonicating at 40-50° C. for 30-50 min, centrifuging and washing with water to obtain a precipitate II; drying and grinding the precipitate II, dispersing it in a mixed solvent with a mass ratio of diethyl hydroxymethylphosphonate and vinyltrimethylsilane of 1:1-2, wherein the mass ratio of the precipitate II to the mixed solvent is 0.1:8-12, stirring and reacting at 300-350° C. under inert atmosphere protection for 1-2 h, cooling, adding ether, filtering the precipitate, and then washing with anhydrous ethanol, drying, and grinding to obtain nano zinc oxide particles;

[0031] (2) dispersing nano zinc oxide particles in an aqueous solution of ferric sulfate at a concentration of 8 to 10 mg / mL, wherein the mass ratio of the nano zinc oxide particles to the ferric sulfate is 1:4 to 5, and stirring the mixture at 30 to 40° C. for 60 to 90 minutes; after filtering, adding the precipitate to N,N-dimethylformamide, and then adding thionyl chloride, wherein the mass volume ratio of the precipitate to N,N-dimethylformamide to thionyl chloride is 1 g:150 mL:2 to 3 g, and adding The mixture is heated to 40-45° C. for 1-2 hours, and distilled under reduced pressure after the reaction is completed. After cooling, the obtained product is added dropwise to a mixed solution of yucca saponin, dichloromethane, ethanol, and triethylamine in a mass volume ratio of 1 g: 20-50 mL: 5-15 mL: 0.1-0.4 g, and stirred for 30-60 minutes while adding dropwise. The mass ratio of the nano zinc oxide particles to yucca saponin is 1: 3-6. After centrifugation, washing, and drying, core-shell nano-microspheres are obtained.

[0032] The preparation method of the above-mentioned plant deodorant comprises the following steps:

[0033] S1: Dispersing 5-10 parts of core-shell nanospheres in a mixture of 10-20 parts of plant essential oil and 2-4 parts of castor oil, and ultrasonicating for 20-30 minutes to obtain a mixture A;

[0034] S2: adding 1 to 3 parts of pinene, 1 to 3 parts of sabinene, 1 to 3 parts of linalool, 1 to 3 parts of myrcene, 1 to 3 parts of α-terpineol, and 2 to 5 parts of preservatives to 70 to 80 parts of deionized water, and stirring for 20 to 30 minutes to obtain a mixture B;

[0035] S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 5 to 8 parts of polyethylene glycol monooleate and continue stirring for 10 to 20 minutes to obtain a plant deodorant.

[0036] Example 1

[0037] A plant deodorant, whose raw materials, measured by weight, include 8 parts of cinnamon oil, 5 parts of lemon oil, 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, 6 parts of polyethylene glycol monooleate, 3 parts of preservative (methylchloroisothiazolinone), 7 parts of core-shell nano-microspheres, and 76 parts of deionized water.

[0038] The preparation method of core-shell nanoparticles comprises the following steps:

[0039] (1) 0.02 g of zinc sulfate was added to 46 mL of a 0.3 mg / mL potassium carbonate aqueous solution, and the suspension was stirred at room temperature. After centrifugation, precipitate I was obtained, which was then dispersed in 72 mL of a 2.5 mg / mL EDTA aqueous solution, ultrasonicated at 40° C. for 45 min, and then centrifuged and washed with water to obtain precipitate II; after drying and grinding, precipitate II was dispersed in a mixed solvent of 11 g of diethyl hydroxymethylphosphonate and vinyltrimethylsilane in a mass ratio of 1:2, stirred at 320° C. for 2 h under nitrogen atmosphere protection, cooled, added with ether, and the precipitate was filtered, and then washed with anhydrous ethanol, dried, and ground to obtain nano zinc oxide particles;

[0040] (2) Disperse the nano zinc oxide particles in 93 mL of 8 mg / mL ferric sulfate aqueous solution, stir and react at 40°C for 75 min; after filtering, add the precipitate to 30 mL of N,N-dimethylformamide, add 0.4 g of thionyl chloride, heat to 40°C for 1.5 h, and distill under reduced pressure after the reaction is completed; after cooling, add the obtained product dropwise to a mixed solution of 0.75 g of yucca saponin, 25 mL of dichloromethane, 5 mL of ethanol, and 0.15 g of triethylamine, stir and react for 40 min while adding dropwise, and then centrifuge, wash, and dry to obtain core-shell nanospheres.

[0041] The preparation method of the above-mentioned plant deodorant comprises the following steps:

[0042] S1: Disperse 7 parts of core-shell nanospheres in a mixture of 8 parts of cinnamon oil, 5 parts of lemon oil and 2 parts of castor oil, and perform ultrasonic treatment for 20 minutes to obtain a mixture A;

[0043] S2: Add 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, and 3 parts of a preservative (methylchloroisothiazolinone) to 76 parts of deionized water, and stir for 20 minutes to obtain a mixture B;

[0044] S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 6 parts of polyethylene glycol monooleate and continue stirring for 15 minutes to obtain a plant deodorant.

[0045] Example 2

[0046] A plant deodorant, whose raw materials, measured by weight, include 2 parts of cinnamon oil, 10 parts of lemon oil, 5 parts of sweet orange oil, 2 parts of pinene, 1 part of sabinene, 1 part of linalool, 1 part of myrcene, 3 parts of alpha-terpineol, 7 parts of polyethylene glycol monooleate, 3 parts of preservative (methylchloroisothiazolinone), 8 parts of core-shell nano-microspheres, and 80 parts of deionized water.

[0047] The preparation method of core-shell nanoparticles comprises the following steps:

[0048] (1) 0.02 g of zinc sulfate was added to 46 mL of a 0.3 mg / mL potassium carbonate aqueous solution, and the suspension was stirred at room temperature. After centrifugation, precipitate I was obtained, which was then dispersed in 72 mL of a 2.5 mg / mL EDTA aqueous solution, ultrasonicated at 40° C. for 45 min, and then centrifuged and washed with water to obtain precipitate II; after drying and grinding, precipitate II was dispersed in a mixed solvent of 11 g of diethyl hydroxymethylphosphonate and vinyltrimethylsilane in a mass ratio of 1:2, stirred at 320° C. for 2 h under nitrogen atmosphere protection, cooled, added with ether, and the precipitate was filtered, and then washed with anhydrous ethanol, dried, and ground to obtain nano zinc oxide particles;

[0049] (2) Disperse the nano zinc oxide particles in 93 mL of 8 mg / mL ferric sulfate aqueous solution, stir and react at 40°C for 75 min; after filtering, add the precipitate to 30 mL of N,N-dimethylformamide, add 0.4 g of thionyl chloride, heat to 40°C for 1.5 h, and distill under reduced pressure after the reaction is completed; after cooling, add the obtained product dropwise to a mixed solution of 0.75 g of yucca saponin, 25 mL of dichloromethane, 5 mL of ethanol, and 0.15 g of triethylamine, stir and react for 40 min while adding dropwise, and then centrifuge, wash, and dry to obtain core-shell nanospheres.

[0050] The preparation method of the above-mentioned plant deodorant comprises the following steps:

[0051] S1: 8 parts of core-shell nanospheres were dispersed in a mixture of 2 parts of cinnamon oil, 10 parts of lemon oil, 5 parts of sweet orange oil and 3 parts of castor oil, and ultrasonicated for 30 minutes to obtain a mixture A;

[0052] S2: adding 2 parts of pinene, 1 part of sabinene, 1 part of linalool, 1 part of myrcene, 3 parts of α-terpineol, and 3 parts of preservatives to 80 parts of deionized water, stirring for 20 minutes, to obtain a mixture B;

[0053] S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 7 parts of polyethylene glycol monooleate and continue stirring for 20 minutes to obtain a plant deodorant.

[0054] Example 3

[0055] A plant deodorant, whose raw materials, measured by weight, include 8 parts of cinnamon oil, 5 parts of lemon oil, 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, 6 parts of polyethylene glycol monooleate, 3 parts of preservative (methylchloroisothiazolinone), 7 parts of core-shell nano-microspheres, and 76 parts of deionized water.

[0056] The preparation method of core-shell nanoparticles comprises the following steps:

[0057] (1) 0.024 g of zinc sulfate was added to 34.5 mL of a 0.4 mg / mL potassium carbonate aqueous solution, and the suspension was obtained by stirring at room temperature. After centrifugation, precipitate I was obtained, which was then dispersed in 56.7 mL of a 3 mg / mL EDTA aqueous solution, ultrasonicated at 50° C. for 30 min, and then centrifuged and washed with water to obtain precipitate II; after drying and grinding, precipitate II was dispersed in a mixed solvent of 11 g of diethyl hydroxymethylphosphonate and vinyltrimethylsilane in a mass ratio of 1:2, stirred at 340° C. under nitrogen atmosphere for reaction for 1 h, cooled, added with ether, and the precipitate was filtered, and then washed with anhydrous ethanol, dried, and ground to obtain nano zinc oxide particles;

[0058] (2) Disperse the nano zinc oxide particles in 71 mL of 9 mg / mL ferric sulfate aqueous solution, stir and react at 30°C for 85 min; after filtering, add the precipitate to 30 mL of N,N-dimethylformamide, add 0.6 g of thionyl chloride, heat to 45°C for 2 h, and distill under reduced pressure after the reaction is completed; after cooling, add the obtained product dropwise to a mixed solution of 0.8 g of yucca saponin, 30 mL of dichloromethane, 5 mL of ethanol, and 0.24 g of triethylamine, stir and react for 50 min while adding dropwise, and then centrifuge, wash, and dry to obtain core-shell nanospheres.

[0059] The preparation method of the above-mentioned plant deodorant comprises the following steps:

[0060] S1: Disperse 7 parts of core-shell nanospheres in a mixture of 8 parts of cinnamon oil, 5 parts of lemon oil and 2 parts of castor oil, and perform ultrasonic treatment for 30 minutes to obtain a mixture A;

[0061] S2: Add 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, and 3 parts of a preservative (methylchloroisothiazolinone) to 76 parts of deionized water, and stir for 20 minutes to obtain a mixture B;

[0062] S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 6 parts of polyethylene glycol monooleate and continue stirring for 10 minutes to obtain a plant deodorant.

[0063] Comparative Example 1

[0064] The difference from Example 1 is that no core-shell nanospheres are added to the plant deodorant.

[0065] A plant deodorant, whose raw materials, measured by weight, include 8 parts of cinnamon oil, 5 parts of lemon oil, 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of alpha-terpineol, 6 parts of polyethylene glycol monooleate, 3 parts of a preservative (methylchloroisothiazolinone), and 76 parts of deionized water.

[0066] The preparation method of the above-mentioned plant deodorant comprises the following steps:

[0067] S1: 8 parts of cinnamon oil and 5 parts of lemon oil were stirred and mixed for 20 minutes to obtain a mixture A;

[0068] S2: Add 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, and 3 parts of a preservative (methylchloroisothiazolinone) to 76 parts of deionized water, and stir for 20 minutes to obtain a mixture B;

[0069] S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 6 parts of polyethylene glycol monooleate and continue stirring for 15 minutes to obtain a plant deodorant.

[0070] Comparative Example 2

[0071] The difference from Example 1 is that EDTA is not added during the preparation of the core-shell nanospheres.

[0072] The preparation method of core-shell nanoparticles comprises the following steps:

[0073] (1) 0.02 g of zinc sulfate was added to 46 mL of a 0.3 mg / mL potassium carbonate aqueous solution, and the suspension was obtained by stirring at room temperature. After centrifugation, precipitate I was obtained, which was then dispersed in 72 mL of water, ultrasonicated at 40° C. for 45 min, and then centrifuged and washed with water to obtain precipitate II; after drying and grinding, precipitate II was dispersed in a mixed solvent of 11 g of diethyl hydroxymethylphosphonate and vinyltrimethylsilane in a mass ratio of 1:2, stirred at 320° C. for 2 h under nitrogen atmosphere protection, cooled, added with ether, and the precipitate was filtered, and then washed with anhydrous ethanol, dried, and ground to obtain nano zinc oxide particles;

[0074] (2) Disperse the nano zinc oxide particles in 93 mL of 8 mg / mL ferric sulfate aqueous solution, stir and react at 40°C for 75 min; after filtering, add the precipitate to 30 mL of N,N-dimethylformamide, add 0.4 g of thionyl chloride, heat to 40°C for 1.5 h, and distill under reduced pressure after the reaction is completed; after cooling, add the obtained product dropwise to a mixed solution of 0.75 g of yucca saponin, 25 mL of dichloromethane, 5 mL of ethanol, and 0.15 g of triethylamine, stir and react for 40 min while adding dropwise, and then centrifuge, wash, and dry to obtain core-shell nanospheres.

[0075] Comparative Example 3

[0076] The difference from Example 1 is that yucca saponin is not added during the preparation of core-shell nanospheres.

[0077] A plant deodorant, whose raw materials, measured by weight, include 8 parts of cinnamon oil, 5 parts of lemon oil, 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, 6 parts of polyethylene glycol monooleate, 3 parts of preservative (methylchloroisothiazolinone), 7 parts of core-shell nano-microspheres, and 76 parts of deionized water.

[0078] The preparation method of core-shell nanoparticles comprises the following steps:

[0079] (1) 0.02 g of zinc sulfate was added to 46 mL of a 0.3 mg / mL potassium carbonate aqueous solution, and the suspension was stirred at room temperature. After centrifugation, precipitate I was obtained, which was then dispersed in 72 mL of a 2.5 mg / mL EDTA aqueous solution, ultrasonicated at 40° C. for 45 min, and then centrifuged and washed with water to obtain precipitate II; after drying and grinding, precipitate II was dispersed in a mixed solvent of 11 g of diethyl hydroxymethylphosphonate and vinyltrimethylsilane in a mass ratio of 1:2, stirred at 320° C. for 2 h under nitrogen atmosphere protection, cooled, added with ether, and the precipitate was filtered, and then washed with anhydrous ethanol, dried, and ground to obtain nano zinc oxide particles;

[0080] (2) Disperse the nano zinc oxide particles in 93 mL of 8 mg / mL ferric sulfate aqueous solution, stir and react at 40°C for 75 min; then filter and add the precipitate into 30 mL of N,N-dimethylformamide, add 0.4 g of thionyl chloride, heat to 40°C and react for 1.5 h. After the reaction is completed, distill under reduced pressure; cool and centrifuge, wash and dry to obtain core-shell nanospheres.

[0081] The preparation method of the above-mentioned plant deodorant comprises the following steps:

[0082] S1: Disperse 7 parts of core-shell nanospheres and 7 parts of yucca saponin in a mixture of 8 parts of cinnamon oil, 5 parts of lemon oil and 2 parts of castor oil, and perform ultrasonic treatment for 20 minutes to obtain a mixture A;

[0083] S2: Add 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, and 3 parts of a preservative (methylchloroisothiazolinone) to 76 parts of deionized water, and stir for 20 minutes to obtain a mixture B;

[0084] S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 6 parts of polyethylene glycol monooleate and continue stirring for 15 minutes to obtain a plant deodorant.

[0085] Comparative Example 4

[0086] The difference from Example 1 is that during the preparation of the core-shell nanospheres, too much yucca saponin is added.

[0087] The preparation method of core-shell nanoparticles comprises the following steps:

[0088] (1) 0.02 g of zinc sulfate was added to 46 mL of a 0.3 mg / mL potassium carbonate aqueous solution, and the suspension was stirred at room temperature. After centrifugation, precipitate I was obtained, which was then dispersed in 72 mL of a 2.5 mg / mL EDTA aqueous solution, ultrasonicated at 40° C. for 45 min, and then centrifuged and washed with water to obtain precipitate II; after drying and grinding, precipitate II was dispersed in a mixed solvent of 11 g of diethyl hydroxymethylphosphonate and vinyltrimethylsilane in a mass ratio of 1:2, stirred at 320° C. for 2 h under nitrogen atmosphere protection, cooled, added with ether, and the precipitate was filtered, and then washed with anhydrous ethanol, dried, and ground to obtain nano zinc oxide particles;

[0089] (2) Disperse the nano zinc oxide particles in 93 mL of 8 mg / mL ferric sulfate aqueous solution, stir and react at 40°C for 75 min; after filtering, add the precipitate to 30 mL of N,N-dimethylformamide, add 0.4 g of thionyl chloride, heat to 40°C for 1.5 h, and distill under reduced pressure after the reaction is completed; after cooling, add the obtained product dropwise to a mixed solution of 1.5 g of yucca saponin, 25 mL of dichloromethane, 5 mL of ethanol, and 0.15 g of triethylamine, stir and react for 70 min while adding dropwise, and then centrifuge, wash, and dry to obtain core-shell nanospheres.

[0090] Comparative Example 5

[0091] The difference from Example 1 is that castor oil is not added during the preparation of the plant deodorant.

[0092] The preparation method of the above-mentioned plant deodorant comprises the following steps:

[0093] S1: Disperse 7 parts of core-shell nanospheres in a mixture of 8 parts of cinnamon oil and 5 parts of lemon oil, and perform ultrasonic treatment for 20 minutes to obtain a mixture A;

[0094] S2: Add 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, and 3 parts of a preservative (methylchloroisothiazolinone) to 76 parts of deionized water, and stir for 20 minutes to obtain a mixture B;

[0095] S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 6 parts of polyethylene glycol monooleate and continue stirring for 15 minutes to obtain a plant deodorant.

[0096] Comparative Example 6

[0097] The difference from Example 1 is that during the preparation of the plant deodorant, no oil-encapsulated structure is formed.

[0098] The preparation method of the above-mentioned plant deodorant comprises the following steps:

[0099] 7 parts of core-shell nanospheres, 8 parts of cinnamon oil, 5 parts of lemon oil, 1 part of pinene, 2 parts of sabinene, 1 part of linalool, 2 parts of myrcene, 2 parts of α-terpineol, 3 parts of preservative (methylchloroisothiazolinone), and 6 parts of polyethylene glycol monooleate are added to 76 parts of deionized water and stirred for 40 minutes to obtain a plant deodorant.

[0100] The deodorizing effect of the plant deodorants in Examples 1-3 and Comparative Examples 1-6 was tested. After 30 minutes, samples were taken and the odor concentration was recorded. The specific results are shown in Table 1.

[0101] Table 1

[0102]

[0103]

[0104] It can be known that the plant deodorant in the present invention can achieve efficient and rapid deodorization effect, and the fragrance is persistent and residual, and the environmental purification is better. Comparative Examples 1, 5-6 show that it is not possible to deodorize fundamentally without adding core-shell nano microspheres, and no good oil-coated structure is formed during the preparation process. The core-shell nano microspheres cannot be retained in the air for a longer time when sprayed, which also damages the deodorization effect. Comparative Examples 2-4 show that EDTA plays an important role in forming the structure of core-shell nano microspheres, and yucca saponin does not form a long branched chain structure on the core-shell nano microspheres, so the synergistic effect of yucca saponin and zinc oxide particles cannot be brought into play. The specific surface area of ​​zinc oxide particles is large and also has an adsorption effect on odor molecules. In addition, the modification of trivalent iron ions on the surface of zinc oxide particles can make the deodorization effect more efficient and rapid. In addition, yucca saponin is a macromolecule containing both water-soluble groups and fat-soluble groups. Adding too much will cause it to form a dense coating layer on the nanospheres, causing it to be miscible with water and also unable to form a good oil-coated structure.

[0105] The raw materials and equipment used in the present invention, unless otherwise specified, are all commonly used raw materials and equipment in the art; the methods used in the present invention, unless otherwise specified, are all conventional methods in the art.

[0106] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. Application of core-shell nanoparticles in plant deodorants, characterized in that: The raw materials of the plant deodorant include 5 to 10 parts by weight of core-shell nano-microspheres; The preparation of core-shell nanoparticles includes: (1) Add zinc sulfate to a potassium carbonate aqueous solution, stir and centrifuge to obtain precipitate I, disperse it in an EDTA aqueous solution, ultrasonicate at 40-50°C, and centrifuge to obtain precipitate II; dry and grind precipitate II, disperse it in a mixed solvent of diethyl hydroxymethylphosphonate and vinyltrimethylsilane, stir at 300-350°C under an inert atmosphere, cool, add ether, filter and precipitate, and obtain nano zinc oxide particles; (2) Dispersing nano zinc oxide particles in an aqueous solution of ferric sulfate, stirring at 30-40°C, filtering, adding the precipitate to N,N-dimethylformamide, adding thionyl chloride, reacting at 40-45°C, and distilling under reduced pressure; After cooling, the obtained product was added dropwise to a mixed solution of yucca saponin, dichloromethane, ethanol and triethylamine, and stirred for reaction while adding dropwise. After centrifugation, core-shell nanospheres were obtained.

2. The use according to claim 1, characterized in that: In step (1), ultrasonic treatment is performed at 40-50° C. for 30-50 min; the reaction is stirred at 300-350° C. for 1-2 h in an inert atmosphere; in step (2), the reaction is stirred at 30-40° C. for 60-90 min; and the reaction is performed at 40-45° C. for 1-2 h.

3. The use according to claim 1, characterized in that: In step (1), the molar ratio of zinc sulfate to potassium carbonate is 1-1.5:1; the concentration of the potassium carbonate aqueous solution is 0.2-0.4 mg / mL; the mass ratio of precipitate I to EDTA is 1:5-7, and the concentration of the EDTA aqueous solution is 2-3 mg / mL.

4. The use according to claim 1 or 3, characterized in that: In step (1), the mass ratio of the precipitate II to the mixed solvent is 0.1:8-12; the mass ratio of the diethyl hydroxymethylphosphonate to vinyltrimethylsilane is 1:1-2.

5. The use according to claim 1, characterized in that: In step (2), the mass ratio of the nano zinc oxide particles to ferric sulfate is 1:4-5, and the concentration of the ferric sulfate aqueous solution is 8-10 mg / mL; the mass ratio of the nano zinc oxide particles to yucca saponin is 1:3-6.

6. The use according to claim 1 or 5, characterized in that: In step (2), the mass volume ratio of the precipitate, N,N-dimethylformamide, and thionyl chloride is 1 g:150 mL:2-3 g; the mass volume ratio of the yucca saponin, dichloromethane, ethanol, and triethylamine is 1 g:20-50 mL:5-15 mL:0.1-0.4 g.

7. A plant deodorant, characterized in that: The raw materials include, by weight, 10-20 parts of plant essential oil, 2-4 parts of castor oil, 1-3 parts of pinene, 1-3 parts of sabinene, 1-3 parts of linalool, 1-3 parts of myrcene, 1-3 parts of α-terpineol, 5-8 parts of polyethylene glycol monooleate, 2-5 parts of preservatives, 5-10 parts of core-shell nano-microspheres, and 70-80 parts of deionized water; the core-shell nano-microspheres are the core-shell nano-microspheres in the application according to any one of claims 1 to 6.

8. The plant deodorant according to claim 7, characterized in that: The plant essential oil is one or more of cinnamon oil, lemon oil, sweet orange oil and lime oil.

9. The plant deodorant according to claim 7, characterized in that: The preservative is one or more of sodium benzoate, carbolic acid, methylchloroisothiazolinone and p-hydroxybenzoate.

10. A method for preparing a plant deodorant as claimed in any one of claims 7 to 9, characterized in that: The steps include: S1: Disperse 5-10 parts of core-shell nanospheres in a mixture of 10-20 parts of plant essential oil and 2-4 parts of castor oil, and perform ultrasonic treatment for 20-30 minutes to obtain a mixture A; S2: adding 1-3 parts of pinene, 1-3 parts of sabinene, 1-3 parts of linalool, 1-3 parts of myrcene, 1-3 parts of α-terpineol, and 2-5 parts of preservatives to 70-80 parts of deionized water, and stirring for 20-30 minutes to obtain a mixture B; S3: Add mixture A dropwise into mixture B while stirring. After the addition is complete, add 5 to 8 parts of polyethylene glycol monooleate and continue stirring for 10 to 20 minutes to obtain a plant deodorant.

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