Essential oil composition, extraction method, use, plant mosquito repellent perfume, and preparation method

Abstract

The invention belongs to the technical field of mosquito repellent plant essential oil compositions, discloses an essential oil composition, an extraction method, purposes and plant mosquito repellent perfume, a preparation method, the essential oil composition, by weight, including 1 to 4 parts of rosewood essential oil, 1 to 4 parts of palm grass essential oil, 1 to 4 parts of parsley essential oil, 1 to 4 parts of red tangerine essential oil, 1 to 4 parts of jasmine essential oil. The invention discloses an essential oil composition, by the compounding of rosewood essential oil, palm grass essential oil, parsley essential oil, red tangerine essential oil and jasmine essential oil, can produce the effect of synergistically improving mosquito repellent efficacy, synergistically repelling mosquitoes;And the invention discloses an extraction method of an essential oil composition, by adding sodium stannate in a biphasic extraction system composed of β-cyclodextrin and sodium sulfate at a specific concentration, effectively improving the yield of the essential oil composition functional component, reducing impurities and avoiding the deterioration of the essential oil composition.

Description

Technical Field

[0001] The invention relates to the technical field of mosquito repellent plant essential oil compositions, and in particular to an essential oil composition, an extraction method, uses, a plant mosquito repellent perfume, and a preparation method. Background Art

[0002] Mosquito bites may cause a variety of diseases such as hepatitis, dengue fever, meningitis, etc., and may also cause parasitic diseases. The saliva or venom of mosquitoes contains a variety of antigenic components. When they invade human skin tissue, they may cause allergic reactions such as itching and rashes. In severe cases, they may cause headaches, fever and other general discomfort. For some people, mosquito bites may even cause symptoms such as systemic allergies or anaphylactic shock. The sweat discharged by the human body evaporates in the air, which is a major "signal" to attract mosquitoes. In addition, people who like to sweat have higher lactic acid levels in their blood and higher acidity in sweat, which is also attractive to mosquitoes.

[0003] Commonly used mosquito repellents on the market are mostly chemical synthetic substances, which not only irritate the skin but may also have certain effects on the nervous system. For example, DEET (N,N-diethyl-3-toluidine) may affect the human nervous system, such as headache, dizziness, coma and other symptoms, and also pollute the environment. While achieving the effect of repelling mosquitoes, it also causes harm to humans and may have adverse effects on the human respiratory tract.

[0004] In recent years, people have shown growing interest in using plant extracts to replace synthetic pesticides. They have significant broad-spectrum antimicrobial and antioxidant effects, and can have multiple effects on insects, such as attracting, repelling, repelling, inhibiting growth, and even poisoning. In addition, plant essential oils also emit a pleasant aroma, are safe for humans and animals, are not likely to induce drug resistance, and are environmentally friendly.

[0005] For example, prior art 1: Chinese patent application 202011069325.7 discloses a mosquito repellent essential oil; the mosquito repellent essential oil is composed of the following volume proportions: 15-25 parts of wormwood oil, 25-35 parts of calamus oil, 25-35 parts of patchouli oil, 25-35 parts of peppermint oil, 8-15 parts of prickly ash oil and 25-35 parts of perilla leaf oil; prior art 1 is prepared with six medicinal plant essential oils, namely wormwood oil, calamus oil, patchouli oil, peppermint oil, prickly ash oil and perilla leaf oil, which promote each other pharmacologically, have a synergistic effect, and have a significant effect of repelling mosquitoes.

[0006] Prior art 1 compounds six essential oils into a plant essential oil composition to achieve the effect of repelling mosquitoes. However, according to Table 1 of the specification of prior art 1, the technical solution of prior art 1 has a low repellency rate for Aedes albopictus and cannot achieve an ideal repellent effect.

[0007] Therefore, the technical problem to be solved by the present invention is to provide an essential oil composition to further improve the mosquito repellent effect of the essential oil composition. Summary of the invention

[0008] One of the purposes of the present invention is to provide an essential oil composition, which synergistically improves the mosquito repellent effect by compounding multiple plant essential oils.

[0009] Another object of the present invention is to provide a method for extracting an essential oil composition. The essential oil composition extracted by the extraction method has a higher content of mosquito repellent components, which can further improve the synergistic mosquito repellent effect of the essential oil composition.

[0010] At the same time, the present invention also provides a use of an essential oil composition, which can be used to prepare mosquito repellent products, such as mosquito repellent capsules, mosquito repellent patches, mosquito repellent perfumes, etc.

[0011] Furthermore, the present invention provides a plant-based mosquito repellent perfume, which is prepared by compounding the essential oil composition of the present invention with menthanediol, and can further improve the mosquito repellent effect and prolong the durability of the repellent effect of the plant-based mosquito repellent perfume.

[0012] Furthermore, the present invention provides a method for preparing a plant mosquito repellent perfume, which has a simple process and can be used for batch production.

[0013] To achieve the above object, the present invention provides an essential oil composition, which comprises, by weight, 1 to 4 parts of rosewood essential oil, 1 to 4 parts of palm grass essential oil, 1 to 4 parts of parsley essential oil, 1 to 4 parts of tangerine essential oil, and 1 to 4 parts of jasmine essential oil.

[0014] Furthermore, by weight, it includes 1 to 2 parts of rosewood essential oil, 1 to 2 parts of palm grass essential oil, 1 to 2 parts of parsley essential oil, 1 to 2 parts of tangerine essential oil, and 1 to 2 parts of jasmine essential oil.

[0015] The present invention provides a method for extracting an essential oil composition, wherein the essential oil composition is obtained by composite extraction of rosewood roots, rose grass leaves, parsley seeds, red orange peels, and jasmine flowers, and comprises the following steps:

[0016] Step 1: Crush rosewood roots, rose grass leaves, parsley seeds, red orange peels, and jasmine flowers into particles;

[0017] Step 2: Add 40% ethanol to the particles and soak for 24 hours, and filter to obtain a filtrate;

[0018] Step 3: adding a two-phase aqueous system consisting of β-cyclodextrin, sodium sulfate and sodium stannate to the filtrate for extraction, and separating and obtaining dextrin encapsulation;

[0019] Step 4: adding anhydrous ethanol to the dextrin encapsulation product and stirring to release the capsule core, separating and performing reduced pressure distillation to obtain the essential oil composition;

[0020] Wherein, in the two-phase aqueous system, the concentration of β-cyclodextrin is 35-45%, the concentration of sodium sulfate is 10-15%, and the concentration of sodium stannate is 1-5%.

[0021] Preferably, the specific operation of step 3 is: adding a two-phase aqueous system consisting of β-cyclodextrin, sodium sulfate and sodium stannate to the filtrate, stirring evenly and then standing and extracting at 25-30°C for 25-30 minutes, then obtaining a β-cyclodextrin phase, and centrifuging the β-cyclodextrin phase to obtain a dextrin encapsulated product.

[0022] Preferably, the specific operation of step 4 is: adding anhydrous ethanol to the dextrin encapsulation product and stirring to release the capsule core, then centrifuging to obtain anhydrous ethanol phase, and distilling the obtained anhydrous ethanol phase at 40° C. and a pressure of -0.07 MPa to -0.09 MPa to obtain the essential oil composition.

[0023] Furthermore, in the two-phase aqueous system, the concentration of β-cyclodextrin is 35-40%, the concentration of sodium sulfate is 10-13%, and the concentration of sodium stannate is 3-5%.

[0024] According to experiments, when the concentration of β-cyclodextrin in the aqueous two-phase system is too high, the yield of the essential oil composition will decrease, and when the concentration of β-cyclodextrin is too low, the essential oil composition will deteriorate; and when the concentration of β-cyclodextrin is 35-40%, the yield of the essential oil composition can be greatly improved, but the deterioration is not avoided. The addition of sodium stannate in the present invention can effectively avoid the deterioration of the essential oil composition and improve the yield of the essential oil composition;

[0025] Similarly, the concentration of sodium sulfate also affects the yield of the essential oil composition. Studies have shown that the yield of the essential oil composition is highest when the concentration of sodium sulfate is 5-10%. However, the essential oil composition extracted within this range has a low purity, resulting in a significant decrease in the mosquito repellent effect of the extracted essential oil composition due to the presence of impurities. The present invention improves the purity of the essential oil composition by adding sodium stannate and complexing impurities with sodium stannate, thereby effectively improving the mosquito repellent effect of the essential oil composition.

[0026] The present invention also provides a use of the essential oil composition for preparing a mosquito repellent product.

[0027] The present invention further provides a plant mosquito repellent perfume, which comprises, by weight percentage, 5-10% of the essential oil composition as described above, 20-30% of menthyl glycol, 1-5% of propylene glycol, 1-5% of PEG40, 30-40% of ethanol, and the remainder of water.

[0028] Furthermore, the present invention provides a method for preparing the above-mentioned plant mosquito repellent perfume, comprising the following steps:

[0029] Step A: adding menthanediol to ethanol to obtain solution A;

[0030] Step B: adding the essential oil composition, propylene glycol, PEG40 and water into solution A and stirring evenly to obtain the plant mosquito repellent perfume.

[0031] Beneficial Effects

[0032] Compared with the prior art, the present invention has at least the following advantages:

[0033] (1) The present invention discloses an essential oil composition, which can produce a synergistic effect of improving mosquito repellent efficacy and synergistically repelling mosquitoes by compounding rosewood essential oil, palm grass essential oil, parsley essential oil, red tangerine essential oil and jasmine essential oil;

[0034] (2) The present invention discloses a method for extracting an essential oil composition, which effectively improves the yield of effective components of the essential oil composition while reducing impurities and avoiding the deterioration of the essential oil composition by adding sodium stannate to a two-phase extraction system composed of β-cyclodextrin and sodium sulfate at a specific concentration;

[0035] (3) The present invention provides a plant-based mosquito repellent perfume. The mosquito repellent perfume prepared by compounding the essential oil composition of the present invention with menthanediol can further improve the mosquito repellent effect and prolong the durability of the repellent effect of the plant-based mosquito repellent perfume. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0037] In order to explain the technical content of the present invention in detail, further description is given below in conjunction with the implementation modes.

[0038] Unless otherwise specified, the parts are parts by weight and the % are percentages by weight.

[0039] The essential oil composition is prepared according to the formula table of Table 1. In the embodiments and comparative examples of the formula table of Table 1, the rosewood essential oil, palm grass essential oil, parsley essential oil, red orange essential oil, jasmine essential oil, citrus essential oil, kiana oil, and thyme essential oil are extracted separately by the following extraction method:

[0040] Step 1: Grind a single raw material (rosewood root, kiana wood, palm grass leaf, parsley seed, thyme leaf, red orange peel, lemon peel or jasmine flower) into particles;

[0041] Step 2: Add 40% ethanol to the particles and soak for 24 hours, and filter to obtain a filtrate;

[0042] Step 3: adding a two-phase aqueous system consisting of β-cyclodextrin and sodium sulfate to the filtrate, stirring evenly and then standing at 25° C. for extraction for 30 minutes to obtain a β-cyclodextrin phase, and centrifuging the β-cyclodextrin phase to obtain a dextrin encapsulation product;

[0043] Step 4: adding anhydrous ethanol to the dextrin encapsulation product and stirring to release the capsule core, and then centrifuging to obtain anhydrous ethanol phase, and distilling the obtained anhydrous ethanol phase at 40° C. and a pressure of -0.08 MPa to obtain essential oil;

[0044] Wherein, in the two-phase aqueous system, the concentration of β-cyclodextrin is 50%, and the concentration of sodium sulfate is 25%.

[0045] Table 1 Essential oil composition formula

[0046]

[0047]

[0048] Example 4

[0049] The formula of the essential oil composition is the same as that of Example 1, except that the rosewood essential oil, palm grass essential oil, parsley essential oil, red tangerine essential oil, and jasmine essential oil are obtained by composite extraction using the following extraction method:

[0050] Step 1: Crush rosewood roots, rose grass leaves, parsley seeds, red orange peels, and jasmine flowers into particles;

[0051] Step 2: Add 40% ethanol to the particles and soak for 24 hours, and filter to obtain a filtrate;

[0052] Step 3: adding a two-phase aqueous system consisting of β-cyclodextrin, sodium sulfate and sodium stannate to the filtrate, stirring evenly and standing at 25° C. for extraction for 30 minutes to obtain a β-cyclodextrin phase, and centrifuging the β-cyclodextrin phase to obtain a dextrin encapsulation product;

[0053] Step 4: adding anhydrous ethanol to the dextrin encapsulation product and stirring to release the capsule core, and then centrifuging to obtain anhydrous ethanol phase, and distilling the obtained anhydrous ethanol phase at 40° C. and a pressure of −0.08 MPa to obtain an essential oil composition;

[0054] Wherein, in the two-phase aqueous system, the concentration of β-cyclodextrin is 40%, the concentration of sodium sulfate is 12%, and the concentration of sodium stannate is 3%.

[0055] Example 5

[0056] The formula of the essential oil composition is the same as that of Example 1, except that the rosewood essential oil, palm grass essential oil, parsley essential oil, red tangerine essential oil, and jasmine essential oil are obtained by composite extraction using the following extraction method:

[0057] Step 1: Crush rosewood roots, rose grass leaves, parsley seeds, red orange peels, and jasmine flowers into particles;

[0058] Step 2: Add 40% ethanol to the particles and soak for 24 hours, and filter to obtain a filtrate;

[0059] Step 3: adding a two-phase aqueous system consisting of β-cyclodextrin and sodium sulfate to the filtrate, stirring evenly and then standing at 25° C. for extraction for 30 minutes to obtain a β-cyclodextrin phase, and centrifuging the β-cyclodextrin phase to obtain a dextrin encapsulation product;

[0060] Step 4: adding anhydrous ethanol to the dextrin encapsulation product and stirring to release the capsule core, and then centrifuging to obtain anhydrous ethanol phase, and distilling the obtained anhydrous ethanol phase at 40° C. and a pressure of −0.08 MPa to obtain an essential oil composition;

[0061] Wherein, in the two-phase aqueous system, the concentration of β-cyclodextrin is 40%, and the concentration of sodium sulfate is 12%.

[0062] Performance Testing

[0063] Test method: The test was conducted in accordance with the national standard GB / T 13917.9-2009 Indoor efficacy test and evaluation of public health insecticides for pesticide registration Part 9: Evaluation method for repellents.

[0064] Attack power test: 300 test insects are placed in a mosquito cage, and the tester's back of the hand is exposed to 40mm×40mm of skin, and the rest is tightly covered. Put your hand into the mosquito cage and stay there for 2 minutes, observe closely, and if you find a mosquito landing, shake your arm to drive it away before its mouthparts pierce the skin, it is counted as one test insect landing. If more than 30 test insects land on the tester and the test insects, the attack power is qualified, and this person and the mosquitoes in this cage can be used for repellent test.

[0065] Repellency test: Select 4 or more testers with qualified attack power (half male and half female, and should not drink alcohol, tea or coffee before and during the test, and should not use products containing fragrances). Draw a 50mm×50mm skin area on the back of each hand, and one of them is charged with 1.5mg / cm 2 (paste repellent) or 1.5uL / cm 2Apply the repellent to be tested evenly with a dose of (liquid repellent), expose 40mm×40mm of the skin, cover the rest tightly, and use the other hand as a blank control. Apply the repellent for 2 hours, put the hand into a mosquito cage with qualified attack power for 2 minutes, and observe whether there are mosquitoes coming to land and suck blood. Then test it every 1 hour. As long as there is a mosquito coming to suck blood, the repellent is judged to be ineffective. Record the effective protection time (h) of the repellent. Perform a control test on the control hand each time. The test insects with qualified attack power can continue the test. If the test insects with unqualified attack power need to be replaced with qualified test insects for testing.

[0066] The essential oil compositions of Examples 1-5 and Comparative Examples 1-8 were tested according to the above test method. The results are shown in Table 2.

[0067] Table 2 Results of the repellent efficacy of the essential oil compositions of Examples 1-5 and Comparative Examples 1-8 on Aedes albopictus

[0068]

[0069] According to the results in Table 2, we can see that:

[0070] According to Examples 1-5, the present invention can effectively improve the mosquito repellent effect by compounding rosewood essential oil, palm grass essential oil, parsley essential oil, red orange essential oil and jasmine essential oil; wherein Example 4 has a more significant improvement in the mosquito repellent effect compared with Examples 1 and 5. Combined with the data in Table 3, it can be seen that the reason for the improvement is that Example 4 adds a certain concentration of sodium stannate on the basis of a two-phase extraction system composed of low-concentration β-cyclodextrin and sodium sulfate, which improves the yield of the essential oil while stabilizing the essential oil composition and removing impurities, thereby effectively improving the mosquito repellent effect of the essential oil composition; According to the results in Table 3, although Example 5 uses a two-phase extraction system composed of low-concentration β-cyclodextrin and sodium sulfate to extract the essential oil composition, which can effectively improve the yield of the essential oil composition, the essential oil composition extracted is deteriorated and has a large impurity content due to the too low concentration, which affects the mosquito repellent effect of the essential oil composition.

[0071] According to the data comparison of Example 1 and Comparative Examples 1-5, when using the same weight of essential oil composition, the mosquito repellent effect of the compound of rosewood essential oil, palmarosa essential oil, parsley essential oil, red tangerine essential oil and jasmine essential oil is significantly improved compared with the compound of rosewood essential oil, palmarosa essential oil, parsley essential oil, red tangerine essential oil and jasmine essential oil, and the protection time is increased by 28.5%-100%.

[0072] According to the data comparison of Example 1, Comparative Examples 1-5 and Comparative Examples 6-8, when using the same weight of essential oil compositions, the technical scheme of replacing rosewood essential oil with kiwi oil having a similar effect to rosewood essential oil in Comparative Example 6, the technical scheme of replacing tangerine essential oil with lemon essential oil in Comparative Example 7, and the technical scheme of replacing parsley essential oil with thyme essential oil in Comparative Example 8 all cannot significantly improve the mosquito repellent effect of the essential oil composition, and the mosquito repellent effects shown by Comparative Examples 6-8 are similar to those shown by Comparative Examples 1-5, indicating that the present invention uses rosewood essential oil, palm grass essential oil, parsley essential oil, tangerine essential oil and jasmine essential oil in a compound to produce a synergistic effect of improving the mosquito repellent effect.

[0073] Essential oil yield

[0074] During the essential oil extraction process of the essential oil composition of Example 1, Example 4, and Example 5, the volume and mass concentration were recorded and calculated according to the following calculation method, and the essential oil yield of Example 1, Example 4, and Example 5 was finally obtained.

[0075] Calculation method of essential oil yield

[0076] Compared with R = V t / V b .

[0077] Where: V t , V b are the volumes of the upper and lower phases, respectively (mL).

[0078] Two-phase water partition coefficient of essential oil K = C t / C b .

[0079] Where: C t , C b are the mass concentrations of the upper and lower phase essential oils, mg / mL, respectively.

[0080] Essential oil yield (%) = RK / (1+RK)×100%.

[0081] The essential oil yields of Example 1, Example 4, and Example 5 were calculated according to the above essential oil yield calculation method. The results are shown in Table 3, where the essential oil yield obtained in Example 1 is the average essential oil yield of all individually extracted essential oils;

[0082] Table 3 Essential oil extraction yield results of Example 1, Example 4, and Example 5

[0083] Group Essential oil yield% Example 1 89.26 Example 4 96.37 Example 5 95.11

[0084] According to the results in Table 3:

[0085] In Examples 4 and 5, a two-phase aqueous extraction system composed of low concentrations of β-cyclodextrin and sodium sulfate is used to extract the essential oil composition, which can effectively improve the yield of the essential oil composition compared to Example 1 which uses a two-phase aqueous extraction system composed of higher concentrations of β-cyclodextrin and sodium sulfate.

[0086] However, since Example 5 only uses a two-phase aqueous extraction system composed of low-concentration β-cyclodextrin and sodium sulfate, the essential oil composition obtained has more impurities and is easy to deteriorate, so its stability and purity are affected, resulting in a significant decrease in the mosquito repellent effect, which is significantly worse than the technical solution of Example 1.

[0087] In Example 4, after the addition of sodium stannate, not only the high yield advantage brought by the two-phase aqueous extraction system composed of low concentrations of β-cyclodextrin and sodium sulfate is improved, but also the impurities in the essential oil composition are reduced and the stability of the essential oil composition is improved. It is speculated that sodium stannate plays the role of a stabilizer and a complexing agent in the two-phase aqueous extraction system composed of low concentrations of β-cyclodextrin and sodium sulfate, effectively stabilizes the extracted essential oil composition and complexes other impurities to improve the purity of the extracted essential oil composition, thereby greatly improving the mosquito repellent effect of the essential oil composition.

[0088] Application Examples

[0089] A plant mosquito repellent perfume is prepared by the following steps:

[0090] Step A: adding 25 parts of menthanediol to 40 parts of ethanol to obtain solution A;

[0091] Step B: Add 10 parts of the essential oil composition of Example 4, 2 parts of propylene glycol, 3 parts of PEG40 and 20 parts of water into solution A and stir evenly to obtain the plant mosquito repellent perfume.

[0092] The prepared plant mosquito repellent perfume contains, by weight percentage, 10% of the essential oil composition of Example 4, 25% of menthanediol, 2% of propylene glycol, 3% of PEG40, 40% of ethanol, and 20% of water.

[0093] Performance Testing

[0094] Test method: The test was conducted in accordance with the national standard GB / T 13917.9-2009 Indoor efficacy test and evaluation of public health insecticides for pesticide registration Part 9: Evaluation method for repellents.

[0095] Attack power test: 300 test insects are placed in a mosquito cage, and the tester's back of the hand is exposed to 40mm×40mm of skin, and the rest is tightly covered. Put your hand into the mosquito cage and stay there for 2 minutes, observe closely, and if you find a mosquito landing, shake your arm to drive it away before its mouthparts pierce the skin, it is counted as one test insect landing. If more than 30 test insects land on the tester and the test insects, the attack power is qualified, and this person and the mosquitoes in this cage can be used for repellent test.

[0096] Repellency test: Select 4 or more testers with qualified attack power (half male and half female, and should not drink alcohol, tea or coffee before and during the test, and should not use products containing fragrances). Draw a 50mm×50mm skin area on the back of each hand, and one of them is charged with 1.5mg / cm 2 (paste repellent) or 1.5uL / cm 2 Apply the repellent to be tested evenly with a dose of (liquid repellent), expose 40mm×40mm of the skin, cover the rest tightly, and use the other hand as a blank control. Apply the repellent for 2 hours, put the hand into a mosquito cage with qualified attack power for 2 minutes, and observe whether there are mosquitoes coming to land and suck blood. Then test it every 1 hour. As long as there is a mosquito coming to suck blood, the repellent is judged to be ineffective. Record the effective protection time (h) of the repellent. Perform a control test on the control hand each time. The test insects with qualified attack power can continue the test. If the test insects have unqualified attack power, they need to be replaced with qualified test insects for the test.

[0097] The plant mosquito repellent perfume obtained in the application example was tested according to the above test method, and the results are shown in Table 4;

[0098] Table 4 The results of the plant mosquito repellent perfume obtained by using the example of Aedes albopictus repellent

[0099]

[0100] According to the results in Table 4, the plant mosquito repellent perfume prepared by the present invention has a significant effect of repelling Aedes albopictus. The mosquito repellent perfume prepared by compounding the essential oil composition of the present invention with menthanediol can further improve the mosquito repellent effect and prolong the durability of the repellent effect of the plant repellent perfume.

[0101] The embodiments presented herein are only embodiments selected according to the combination of all possible embodiments. The appended claims should not be limited by the embodiments describing the present invention. Some numerical ranges used in the claims include sub-ranges therein, and the changes in these ranges should also be covered by the appended claims.

Claims

1. A mosquito repellent essential oil composition, characterized in that: By weight, it includes 2 parts of rosewood essential oil, 3 parts of palm grass essential oil, 1 part of parsley essential oil, 4 parts of red tangerine essential oil, and 3 parts of jasmine essential oil; The rosewood essential oil, palm grass essential oil, parsley essential oil, red tangerine essential oil, and jasmine essential oil are obtained by composite extraction through the following extraction method: Step 1: Crush rosewood roots, rose grass leaves, parsley seeds, red orange peels, and jasmine flowers into particles; Step 2: Add 40% ethanol to the particles and soak for 24 hours, then filter to obtain a filtrate; Step 3: adding a two-phase aqueous system consisting of β-cyclodextrin, sodium sulfate and sodium stannate to the filtrate, stirring evenly and standing at 25° C. for extraction for 30 minutes to obtain a β-cyclodextrin phase, and centrifuging the β-cyclodextrin phase to obtain a dextrin encapsulation product; Step 4: adding anhydrous ethanol to the dextrin encapsulation product and stirring to release the capsule core, and then centrifuging to obtain anhydrous ethanol phase, and distilling the obtained anhydrous ethanol phase at 40° C. and a pressure of −0.08 MPa to obtain an essential oil composition; Wherein, in the aqueous two-phase system, the concentration of β-cyclodextrin is 40%, the concentration of sodium sulfate is 12%, and the concentration of sodium stannate is 3%.

2. A use of the mosquito repellent essential oil composition as claimed in claim 1 to prepare a mosquito repellent product.

3. A plant mosquito repellent perfume, characterized in that: Calculated by weight percentage, it comprises 5-10% of the essential oil composition as claimed in claim 1, 20-30% of menthanediol, 1-5% of propylene glycol, 1-5% of PEG40, 30-40% of ethanol, and the balance of water.

4. A method for preparing the plant mosquito repellent perfume as claimed in claim 3, characterized in that: The steps include: Step A: adding menthanediol to ethanol to obtain solution A; Step B: adding the essential oil composition, propylene glycol, PEG40 and water into solution A and stirring evenly to obtain the plant mosquito repellent perfume.

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