Compound essence capable of expelling mites and inhibiting bacteria and preparation method of compound essence

Abstract

The invention discloses a compound essence capable of expelling mites and inhibiting bacteria and a preparation method of the compound essence capable of expelling mites and inhibiting bacteria. The essential oil is prepared from the following raw materials in parts by mass: 20-60 parts of peppermint essential oil, 5-15 parts of rosemary essential oil, 15-25 parts of bergamot essential oil, 5-15 parts of grapefruit essential oil, 28 parts of citron essential oil, 26 parts of rosa multiflora flower essential oil, 17 parts of salvia miltiorrhiza oil, 15 parts of pelargonium graveolens essential oil, 15 parts of cinnamomum camphora leaf oil, 14 parts of agilawood oil, 13 parts of European juniper fruit oil and 1-8 parts of cineole eucalyptus essential oil. The compound essence capable of expelling mites and inhibiting bacteria, prepared from the raw materials, is high in retention rate of active ingredients and small in pungent smell.

Description

Technical Field

[0001] This application relates to the field of natural plant fragrance products, and in particular to a compound fragrance for repelling mites and inhibiting bacteria, and its preparation method. Background Technology

[0002] The development of compound essential oil technology marks a crucial turning point in the essential oil industry, shifting from empirical to scientific applications. Its evolution closely aligns with the evolving needs of modern health. Traditional single essential oils, due to the limited mechanisms of action of their individual components, struggle to address complex health issues such as mood regulation and chronic fatigue. Compound essential oils achieve functional breakthroughs through the synergistic effects of multiple components. For example, combining lavender and sweet orange essential oils can alleviate anxiety and improve low mood, with a significantly better overall effect than the combination of single essential oils. The core technologies include pharmacological component analysis, molecular dynamics simulation, and stability verification. GC-MS detection is required to ensure the activity of components during storage and use, and toxicological assessments are used to control risks.

[0003] Currently, the global market for compound essential oils continues to expand at an annual growth rate of 10.4%, with applications covering areas such as workplace stress reduction, sleep management, and post-operative rehabilitation.

[0004] However, traditional compound essential oils have the problem of evaporation too quickly, which leads to the rapid loss of active ingredients. Some volatile substances may also produce an irritating odor, affecting the user experience and the duration of therapeutic effects. Summary of the Invention

[0005] To address the issues of excessively rapid evaporation of traditional compound essential oils, which leads to the rapid loss of active ingredients and the potential for some volatile substances to produce irritating odors, a compound fragrance with mite-repellent and antibacterial properties and its preparation method are provided.

[0006] The above-mentioned objective of this invention is achieved through the following technical solutions: A compound fragrance for repelling mites and inhibiting bacteria, composed of the following raw materials in parts by weight: 20-60 parts peppermint essential oil, 5-15 parts rosemary essential oil, 15-25 parts bergamot essential oil, 5-15 parts grapefruit essential oil, 28 parts citron essential oil, 26 parts rosehip essential oil, 17 parts tanshinone oil, 15 parts geranium essential oil, 15 parts linalool leaf oil, 14 parts agarwood oil, 13 parts juniper fruit oil, and 1-8 parts eucalyptus oil.

[0007] Through the above technical solution, menthol in peppermint essential oil and geraniol in citron essential oil form a three-dimensional network structure through hydrogen bonds, which inhibits volatilization; essential oil molecules undergo transesterification to generate large molecular terpene esters, which reduces vapor pressure; eucalyptol captures free radicals, delays the oxidative degradation of other essential oil components, and achieves long-lasting antibacterial effect.

[0008] Optionally, the ratio of peppermint essential oil to rosemary essential oil is 100:37.5 to 100:42.5.

[0009] Through the above technical solution, when the peppermint:rosemary ratio is 100:37.5 to 100:42.5, the molar ratio of menthol to rosmarinic acid is 1:0.1, which inhibits the mitochondrial complex enzyme III of dust mites, enhances the mite-repelling effect, shortens the intermolecular distance, increases the vapor diffusion activation energy, and slows down the reaction rate, thereby reducing volatilization loss.

[0010] Optionally, the raw materials may also include 0.1 to 2 parts by weight of polyglycerol-3 diisostearate.

[0011] Through the above technical solution, polyglycerol-3 molecules form a dense monolayer through hydrogen bonds and van der Waals forces, which blocks the outward diffusion of volatile components and prolongs the effective mite-repelling and antibacterial time.

[0012] Optionally, the raw materials may also include 1 to 6 parts by weight of isopropyl myristate.

[0013] Through the above technical solution, isopropyl myristate, as an amphiphilic molecule, anchors essential oil components at its hydrophobic end and forms hydrogen bonds with the hydroxyl groups of cellulose fibers at its hydrophilic end, reducing the interfacial tension between oil and fiber, promoting the uniform dispersion of essential oil, allowing antibacterial components to remain on the fabric surface for a longer time, improving the contact efficiency with bacteria, and enhancing the antibacterial effect.

[0014] Optionally, agarwood oil and tanshinone oil are distributed in the essential oil in microcapsule form, the core material of the essential oil is a blend of agarwood oil and tanshinone oil, and the wall material is a sodium alginate-chitosan complex.

[0015] Through the above technical solution, the sodium alginate-chitosan complex forms a dense microcapsule wall through electrostatic self-assembly, binding with Ca... 2+ Cross-linking and curing form a pH-responsive sustained-release structure. The microcapsules slowly release active ingredients in a humid environment, prolonging the antibacterial effect. The wall material blocks highly volatile components, reducing the rate of volatilization loss.

[0016] Optionally, the microencapsulation preparation method of agarwood oil and tanshinone oil is as follows: Agarwood oil and tanshinone oil are mixed at a mass ratio of 1:1.2 as core material, and mixed with sodium alginate-chitosan complex at a mass ratio of 1:4. The mixture is homogenized under high pressure in a 50°C water bath to form a nanoemulsion; then CaCl2 solution is added, and the mixture is stirred and solidified to generate a liquid microcapsule suspension.

[0017] Through the above technical solution, high-pressure homogenization disperses the core material into droplets, increases the surface area of ​​the wall material, improves the encapsulation rate, and CaCl2 solution penetrates the sodium alginate layer to form a "chitosan-calcium alginate" double-wall structure. The microcapsules preferentially disintegrate in a high-humidity environment, releasing active ingredients to the mite breeding area, thus achieving targeted release.

[0018] Optionally, the mass ratio of sodium alginate to chitosan is 3:1.

[0019] Through the above technical solution, the mass ratio of sodium alginate to chitosan is 3:1, which balances the charge density of the amino groups of chitosan and the carboxyl groups of sodium alginate, forming a stable polyelectrolyte network. Chitosan fills the network pores of sodium alginate, reducing the permeability of the wall material, blocking small molecule volatiles, and avoiding irritation caused by initial sudden release.

[0020] The second objective of this invention is achieved through the following technical solution: The above-mentioned method for preparing a compound fragrance for repelling mites and inhibiting bacteria includes the following steps: S1: Weigh the raw materials; S2: Use peppermint oil as the base oil, and add other essential oils and additives in sequence, stirring for 10-20 minutes after each addition. Filter after completion. S3: In a dark environment with a temperature of 25±2℃ and a humidity of ≤30%, age the mixed essential oils for 18 to 24 hours.

[0021] Through the above technical solution, aging at 25±2℃ in the dark promotes the hydrogen bonding between essential oil molecules, avoids high-temperature oxidation and decomposition, stabilizes the mite-repelling and antibacterial components, and prevents premature volatilization and loss of effectiveness.

[0022] In summary, this application has at least the following beneficial effects: 1: The aging process generates large molecular weight esters, reducing the escape of small molecules and preventing premature volatilization; 2: Microencapsulation technology and phase change microspheres physically block the volatilization channels, increasing the retention rate of active ingredients and prolonging the effective antibacterial time; 3: Specific essential oil ratios dually inhibit the nervous system of mites, combined with the intelligent release mechanism of microcapsules to achieve rapid knockdown and long-lasting protection. Detailed Implementation

[0023] raw material: Peppermint essential oil, rosemary essential oil, bergamot essential oil, grapefruit essential oil, citron essential oil, rosehip essential oil, tanshinone oil, geranium essential oil, linalool leaf oil, agarwood oil, juniper fruit oil, and eucalyptus oil were all purchased from Shanghai Yunfeng Fragrance & Flavor Co., Ltd. Polyglycerol-3 diisostearate and isopropyl myristate were purchased from Jiangsu Runfeng Synthetic Technology Co., Ltd. The 0.1 mol / L CaCl2 solution was commercially available. 1% acetic acid aqueous solution was purchased from Beijing Boao Tuoda Technology Co., Ltd. Sodium alginate powder, chitosan powder, and oleyl alcohol polyether-10 emulsifier were all purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0024] Preparation Example 1 A sodium alginate-chitosan complex is prepared as follows: Weigh 210g of sodium alginate powder, add sodium alginate powder to 50℃ preheated deionized water at a ratio of 1% (w / v), and stir magnetically at 300rpm for 30min in a 50℃ water bath until the solution is clear and free of particles. Let stand for 1h to remove bubbles. Weigh 70g of chitosan powder and add it to a 1% (w / v) aqueous solution of acetic acid. Stir at 200 rpm for 2 hours at 25±2℃ until the solution is clear. Remove undissolved impurities by passing the solution through a 0.45μm filter membrane.

[0025] The prepared sodium alginate solution and chitosan solution were mixed at a mass ratio of 3:1. The chitosan solution was slowly added dropwise to the sodium alginate solution at a rate of 1 mL / min, while stirring continuously at 200 rpm until the solution changed from transparent to uniform milky white, thus obtaining the sodium alginate-chitosan complex.

[0026] Preparation Example 2 A sodium alginate-chitosan complex is prepared as follows: Weigh 210g of sodium alginate powder, add sodium alginate powder to 50℃ preheated deionized water at a ratio of 1% (w / v), and stir magnetically at 300rpm for 30min in a 50℃ water bath until the solution is clear and free of particles. Let stand for 1h to remove bubbles. Weigh 105g of chitosan powder and add it to a 1% (w / v) aqueous acetic acid solution. Stir at 200rpm for 2 hours at 25±2℃ until the solution is clear. Remove undissolved impurities by passing the solution through a 0.45μm filter membrane.

[0027] The prepared sodium alginate solution and chitosan solution were mixed at a mass ratio of 2:1. The chitosan solution was slowly added dropwise to the sodium alginate solution at a rate of 1 mL / min, while stirring continuously at 200 rpm until the solution changed from transparent to uniform milky white, thus obtaining the sodium alginate-chitosan complex.

[0028] Preparation Example 3 A liquid microcapsule suspension is prepared by the following method: 85g of agarwood oil and 70g of tanshinone oil were mixed at a mass ratio of 1:1.2, and 2g of oleyl alcohol polyether-10 emulsifier was added. The mixture was stirred at 500rpm for 10min in a 50℃ water bath to form a uniform oil phase. 155g of deionized water was added to initially emulsify the mixture into a crude emulsion as the core material. The sodium alginate-chitosan composite obtained in Example 1 was used as the wall material. The core material and wall material were mixed at a mass ratio of 1:4 and stirred at 200 rpm for 5 minutes. The mixture was then added to an 80 MPa high-pressure homogenizer and circulated 3 times at 50°C to form a stable nanoemulsion. Add 0.1 mol / L CaCl2 solution to the nanoemulsion at a volume ratio of 1:10, stir at 200 rpm for 30 min, and centrifuge at 8000 rpm for 10 min to obtain a liquid microcapsule suspension.

[0029] Preparation Example 4 A liquid microcapsule suspension, the preparation method of which differs from that of preparation 3 in that the sodium alginate-chitosan complex obtained in preparation example 2 is used as the wall material.

[0030] Preparation Example 5 A liquid microcapsule suspension, the preparation method of which differs from preparation 3 in that the core material and the wall material are mixed at a mass ratio of 1:3.

[0031] Example 1 A compound fragrance for repelling mites and inhibiting bacteria is prepared from the following raw materials in the indicated mass fractions: 150g peppermint essential oil, 60g rosemary essential oil, 100g bergamot essential oil, 50g grapefruit essential oil, 140g citron essential oil, 130g rosehip essential oil, 85g tanshinone oil, 75g geranium essential oil, 75g linalool leaf oil, 70g agarwood oil, 65g juniper fruit oil, and 20g eucalyptus oil (eucalyptus oil type).

[0032] A compound fragrance for repelling mites and inhibiting bacteria is prepared as follows: S1: Weigh the raw materials in a constant temperature and humidity environment (temperature 20±2℃, humidity ≤40%) to avoid moisture absorption or volatilization. S2: Add peppermint oil as a base oil, then add tanshinone oil, geranium essential oil, agarwood oil, citron fruit oil, bergamot fruit oil, grapefruit fruit oil, rosemary fruit oil, rosehip fruit oil, camphor leaf oil, juniper fruit oil, and eucalyptus oil (eucalyptus oil type) in sequence. Add one ingredient at a time, and stir at 300 rpm for 5 minutes after each addition, controlling the mixing temperature at 25±2℃ to obtain the mixed essential oil. S3: The essential oil was filtered using a 0.22μm polyethersulfone (PES) organic filter membrane at a pressure of 0.2MPa to obtain the filtered essential oil. S4: In a light-proof environment with a temperature of 25±2℃ and a humidity of ≤30%, the mixed essential oils are aged for 24 hours, and mixed by shaking at 300rpm for 5 minutes every 6 hours to obtain a compound fragrance that repels mites and inhibits bacteria.

[0033] Comparative Example 1 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 1 in that it does not contain eucalyptus oil of the eucalyptus oil type in its raw materials.

[0034] Comparative Example 2 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 1 in that the S4 aging process is not performed after S3 in the preparation method, and the compound fragrance is obtained directly after filtration.

[0035] Example 2 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 1 in that the amount of rosemary essential oil in the raw materials is 25g.

[0036] Example 3 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 1 in that the raw materials contain 5g of polyglycerol-3 diisostearate, and in step S2 of the preparation method, after all other raw materials are added, polyglycerol-3 diisostearate is added and stirred at 300rpm for 5min to obtain a mixed essential oil.

[0037] Example 4 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 1 in that the raw materials also include 15g of isopropyl myristate, and in step S2 of the preparation method, after all other raw materials are added, isopropyl myristate is added and stirred at 300rpm for 5min to obtain a mixed essential oil.

[0038] Example 5 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 1 in that the raw materials also include 5g of polyglycerol-3 diisostearate and 15g of isopropyl myristate. In step S2 of the preparation method, after all other raw materials are added, polyglycerol-3 diisostearate is added first, followed by isopropyl myristate. Each addition is followed by stirring at 300 rpm for 5 minutes to obtain a mixed essential oil.

[0039] Example 6 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 5 in that agarwood oil and tanshinone oil are no longer added in S2, and other raw materials are mixed in the original order. After filtration in S3, the liquid microcapsule suspension obtained in Preparation Example 3 is added, and the mixture is stirred at 300 rpm for 5 minutes after addition, followed by aging in S4.

[0040] Example 7 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 5 in that agarwood oil and tanshinone oil are no longer added in S2, and other raw materials are mixed in the original order. After filtration in S3, the liquid microcapsule suspension obtained in Preparation Example 4 is added, and the mixture is stirred at 300 rpm for 5 minutes. Then, it is aged in S4.

[0041] Example 8 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 5 in that agarwood oil and tanshinone oil are no longer added in S2, and other raw materials are mixed in the original order. After filtration in S3, the liquid microcapsule suspension obtained in Preparation Example 5 is added, and the mixture is stirred at 300 rpm for 5 minutes after addition, followed by aging in S4.

[0042] Example 9 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 5 in that the raw materials contain 100g of peppermint essential oil, 25g of rosemary essential oil, 75g of bergamot essential oil, 25g of grapefruit essential oil, and 5g of eucalyptus oil.

[0043] Example 10 A compound fragrance for repelling mites and inhibiting bacteria, which differs from Example 5 in that the raw materials contain 300g of peppermint essential oil, 75g of rosemary essential oil, 125g of bergamot essential oil, 75g of grapefruit essential oil, and 40g of eucalyptus oil.

[0044] The early volatilization rate, half-knock time, and sustained antibacterial rate of the compound flavors of Examples 1-10 and Comparative Examples 1-2 were tested.

[0045] According to ISO 16000-6 (static headspace method), a static headspace-GC / MS gas chromatography-mass spectrometry system was used. The system was placed in a constant temperature oven at 40℃ for 24 hours to detect the residual rate of volatile components and to conduct early volatilization rate detection. The test results are shown in Table 1.

[0046] According to the "Evaluation of Anti-mite Performance of Textiles" (GB / T 24253-2009), house dust mites were used as test mites. The test was conducted according to the inhibition method. The time when half of the mites were knocked down was recorded. Mites that were lying on their backs and unable to turn over were considered knocked down. The half knockdown time was obtained. The test results are shown in Table 1.

[0047] According to the standard "Evaluation of antimicrobial properties of antimicrobial finished textiles" (ISO 20743:2013), Staphylococcus aureus was used as the test species. The plate count method was used to count the number of colonies and obtain the 72-hour continuous antimicrobial rate. The test results are shown in Table 1.

[0048] Table 1. Detection results of compound flavorings Referring to Table 1, Compared with Comparative Example 1, the early volatility and half-knockout time of Example 1 were less than those of Comparative Example 1, and the sustained antibacterial rate of Example 1 was greater than that of Comparative Example 1. The difference between Example 1 and Comparative Example 1 is that eucalyptol-type eucalyptus essential oil was added to Example 1. Eucalyptol captures free radicals and delays the oxidative degradation of other essential oil components, achieving rapid repellency and long-lasting antibacterial effect. Therefore, it can be seen that the addition of eucalyptol-type eucalyptus essential oil is necessary.

[0049] Compared with Comparative Example 1 and Comparative Example 2, the early volatility and half-knock time of the compound fragrance in Example 1 were less than those of the compound fragrance in Comparative Example 2, and the sustained antibacterial rate of the compound fragrance in Example 1 was greater than that of the compound fragrance in Comparative Example 2. The difference between Example 1 and Comparative Example 2 is that Comparative Example 2 does not undergo aging treatment. During aging, different essential oil components gradually diffuse through Brownian motion, eliminating local concentration gradients and forming a thermodynamically stable homogeneous system. Highly polar and non-polar components adjust the dielectric constant through intermolecular forces, reducing the risk of phase separation, and the components work synergistically. Therefore, the addition of eucalyptol-type eucalyptus essential oil is necessary.

[0050] Comparing Example 1 and Example 2, the early volatility and half-downtime of the compound fragrance in Example 1 are less than those in Example 2, and the sustained antibacterial rate of the compound fragrance in Example 1 is greater than that in Example 2. The difference between Example 1 and Example 2 is that in Example 1, the ratio of peppermint essential oil to rosemary essential oil is 100:40, and the molar ratio of menthol to rosmarinic acid is 1:0.1. This inhibits the mitochondrial complex enzyme III of dust mites, enhances the mite-repelling effect, shortens the intermolecular distance, increases the vapor diffusion activation energy, and slows down the reaction rate, thereby reducing volatilization loss. Therefore, the ratio of peppermint essential oil to rosemary essential oil of 100:40 is superior.

[0051] Comparing Example 1 and Example 3, the early volatility and half-maximum knockdown time of the compound fragrance in Example 1 are greater than those of the compound fragrance in Example 3; the sustained antibacterial rate of the compound fragrance in Example 1 is less than that of the compound fragrance in Example 3. Compared with Example 1, Example 3 added polyglycerol-3 diisostearate. The polyglycerol-3 molecules form a dense monolayer through hydrogen bonds and van der Waals forces, which blocks the outward diffusion of volatile components and prolongs the effective mite-repelling and antibacterial time. Therefore, it can be seen that adding polyglycerol-3 diisostearate is superior.

[0052] Comparing Example 1 and Example 4, the early volatilization rate and half-maximum knockdown time of the compound fragrance in Example 1 are greater than those of the compound fragrance in Example 4; the sustained antibacterial rate of the compound fragrance in Example 1 is less than that of the compound fragrance in Example 4. Compared with Example 1, Example 4 added isopropyl myristate. As an amphiphilic molecule, isopropyl myristate anchors the essential oil components at its hydrophobic end and forms hydrogen bonds with the hydroxyl groups of cellulose fibers at its hydrophilic end, reducing the oil-fiber interfacial tension, promoting the uniform dispersion of essential oils, allowing the antibacterial components to remain on the fabric surface for a longer time, improving the contact efficiency with bacteria, and enhancing the antibacterial effect. Therefore, adding isopropyl myristate is superior.

[0053] Comparing Examples 3, 4, and 5, the early volatilization rate and half-maximum knockdown time of the compound fragrances in Examples 3 and 4 were greater than those in Example 5; the sustained antibacterial rate of the compound fragrances in Examples 3 and 4 was less than that of the compound fragrance in Example 5. Example 5 included polyglycerol-3 diisostearate and isopropyl myristate. Polyglycerol-3 diisostearate and isopropyl myristate formed mixed micelles, which formed a dense interfacial film that blocked the escape of volatile components. At the same time, isopropyl myristate was adsorbed on the surface of the droplets and delayed release. Therefore, it can be seen that the addition of both polyglycerol-3 diisostearate and isopropyl myristate is better.

[0054] Comparing Examples 5 and 6, the early volatilization rate and half-maximum knockdown time of the compound fragrance in Example 5 are greater than those of the compound fragrance in Example 6; the sustained antibacterial rate of the compound fragrance in Example 5 is less than that of the compound fragrance in Example 6. Compared with Example 5, Example 6 underwent microencapsulation treatment. The microcapsules slowly released the active ingredients in a humid environment, prolonging the antibacterial effect. The wall material blocked highly volatile components, reducing the volatilization loss rate. Therefore, microencapsulation is superior.

[0055] Comparing Examples 6, 7, and 8, the early volatilization rate and half-maximum knockdown time of the compound fragrances in Examples 7 and 8 were greater than those in Example 6; the sustained antibacterial rate of the compound fragrances in Examples 7 and 8 was less than that of the compound fragrance in Example 6. Compared to Example 7, the mass ratio of sodium alginate solution to chitosan in the microencapsulation treatment of Example 6 was 3:1. Compared to Example 8, the mass ratio of core material to core wall in the microencapsulation treatment of Example 6 was 1:4. The 3:1 mass ratio of sodium alginate to chitosan balances the charge density of the amino groups in chitosan and the carboxyl groups in sodium alginate, forming a stable polyelectrolyte network. Chitosan fills the network pores of sodium alginate, reducing the permeability of the wall material, blocking small molecule volatiles, and avoiding irritation caused by initial burst release. The 1:4 mass ratio of core material to core wall ensures that the core wall fully coats the core material droplets, reducing the escape of free active ingredients. Therefore, a 3:1 mass ratio of sodium alginate to chitosan and a 1:4 mass ratio of core material to core wall are superior.

[0056] Comparing Examples 6, 9, and 10, the early volatility and half-maximum knockdown time of the compound fragrances of Examples 9 and 10 are greater than those of the compound fragrance of Example 6; the sustained antibacterial rate of the compound fragrances of Examples 9 and 10 is less than that of the compound fragrance of Example 6. Compared with Example 6, the raw materials of Example 9 contain 100g of peppermint essential oil, 25g of rosemary essential oil, 75g of bergamot essential oil, 25g of grapefruit essential oil, and 5g of eucalyptus oil. The raw materials of Example 10 contain 300g of peppermint essential oil, 75g of rosemary essential oil, 125g of bergamot essential oil, 75g of grapefruit essential oil, and 40g of eucalyptus oil. Both excessively high and low contents of peppermint essential oil, rosemary essential oil, bergamot essential oil, grapefruit essential oil, and eucalyptus oil will affect the overall volatility. Therefore, 150g of peppermint essential oil, 60g of rosemary essential oil, 100g of bergamot essential oil, 50g of grapefruit essential oil, and 20g of eucalyptus oil are preferred.

[0057] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of protection claimed by the present invention, they are protected by patent law.

Claims

1. A compound fragrance for repelling mites and inhibiting bacteria, characterized in that, It consists of the following parts by weight of raw materials: Peppermint essential oil 20-60 parts, rosemary essential oil 5-15 parts, bergamot essential oil 15-25 parts, grapefruit essential oil 5-15 parts, citron essential oil 28 parts, rose essential oil 26 parts, tanshinone oil 17 parts, geranium essential oil 15 parts, camphor leaf oil 15 parts, agarwood oil 14 parts, juniper fruit oil 13 parts, eucalyptus oil (eucalyptus oil type) 1-8 parts.

2. The compound fragrance for repelling mites and inhibiting bacteria according to claim 1, characterized in that, The ratio of peppermint essential oil to rosemary essential oil is 100:37.5 to 100:42.

5.

3. The compound fragrance for repelling mites and inhibiting bacteria according to claim 1, characterized in that, The raw materials also include 0.1 to 2 parts by weight of polyglycerol-3 diisostearate.

4. The compound fragrance for repelling mites and inhibiting bacteria according to claim 1, characterized in that, The raw materials also include 2 to 6 parts by weight of isopropyl myristate.

5. The compound fragrance for repelling mites and inhibiting bacteria according to claim 1, characterized in that, Agarwood oil and tanshinone oil are distributed in the essential oil in the form of microcapsules. The core material of the essential oil is a compound of agarwood oil and tanshinone oil, and the wall material is a sodium alginate-chitosan complex.

6. The compound fragrance for repelling mites and inhibiting bacteria according to claim 5, characterized in that, The microencapsulation preparation method of the agarwood oil and tanshinone oil is as follows: Agarwood oil and tanshinone oil were mixed at a mass ratio of 1:1.3 to 1:1.2 as the core material, and then mixed with sodium alginate-chitosan complex at a mass ratio of 1:

4. The mixture was homogenized under high pressure in a 50°C water bath to form a nanoemulsion. Subsequently, CaCl2 solution was added and stirred to solidify, generating a liquid microcapsule suspension.

7. The compound fragrance for repelling mites and inhibiting bacteria according to claim 5, characterized in that, The mass ratio of sodium alginate to chitosan is 3:

1.

8. The method for preparing the compound fragrance for repelling mites and inhibiting bacteria according to any one of claims 1 to 7, characterized in that, Includes the following steps, S1: Weigh the raw materials; S2: Use peppermint oil as the base oil, then add other essential oils and additives in sequence, stirring for 10-20 minutes after each addition, and then filter. S3: In a dark environment with a temperature of 25±2℃ and a humidity of ≤30%, age the mixed essential oils for 18~24 hours.

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