Fresh fragrance incense type long-acting electric mosquito-repellent liquid and preparation method thereof

Abstract

The application relates to the technical field of electric heating mosquito-repellent liquid, and particularly discloses a fresh and fragrant incense type long-acting electric heating mosquito-repellent liquid and a preparation method thereof. The preparation raw materials of the fresh and fragrant incense type long-acting electric heating mosquito-repellent liquid include pyrethroid insecticides 0.68-0.86 parts, an incense compound 2-4.5 parts, stabilizers 0.6-0.8 parts, soothing aids 0.05-0.1 parts and solvents 92-93.84 parts; the preparation raw materials of the incense compound include plant essential oils and a compatible agent, the mass ratio of the plant essential oils to the compatible agent is (1.5-3.0):(0.5-1.5), and the compatible agent includes polyglyceryl-6 caprylate and alkyl polyglycoside with a mass ratio of 1:(0.3-0.5). The application can effectively improve the compatibility of incense components and insecticidal components in the mosquito-repellent liquid, and realizes the dual functions of efficient mosquito repellence and fresh incense.

Description

Technical Field

[0001] This invention relates to the field of electric mosquito repellent liquid technology, and in particular to a fresh and fragrant long-lasting electric mosquito repellent liquid and its preparation method. Background Technology

[0002] Electric mosquito repellent liquid, a common indoor hygiene and insecticidal product, uses an electric heater to continuously evaporate the liquid, achieving the effect of repelling and killing mosquitoes. It is widely used in homes, bedrooms, and offices. As consumers' demands for quality of life increase, products with only mosquito-repelling functions are no longer sufficient to meet market needs. Multi-functional products that combine air freshening, fragrance creation, and even mood-soothing properties are becoming an important development trend.

[0003] To meet the demand of some consumers for scent improvement, some technologies have been developed to combine aromatherapy ingredients with electric mosquito repellent liquid. A common approach is to directly add fragrances or natural essential oils to the base of the mosquito repellent liquid. However, this method of directly adding essential oils often leads to poor compatibility between aromatherapy and insecticidal ingredients. Some products with added natural essential oils experience layering or precipitation due to ingredient incompatibility, or the insecticidal ingredients may decompose, reducing the mosquito-repelling effect. Summary of the Invention

[0004] In order to improve the compatibility of the fragrance and insecticidal components in mosquito repellent liquid and achieve the dual functions of highly effective mosquito repellency and refreshing fragrance, this application provides a refreshing and fragrant long-lasting electric mosquito repellent liquid and its preparation method.

[0005] Firstly, this application provides a refreshing and fragrant long-lasting electric mosquito repellent liquid, which adopts the following technical solution: A refreshing and fragrant long-lasting electric mosquito repellent liquid comprises the following ingredients in parts by weight: Pyrethroid insecticide 0.68-0.86 parts, aromatherapy compound 2-4.5 parts, stabilizer 0.6-0.8 parts, soothing agent 0.05-0.1 parts, solvent 92-93.84 parts; The raw materials for preparing the aromatherapy complex include plant essential oils and compatibilizers, wherein the mass ratio of the plant essential oils to the compatibilizers is (1.5-3.0):(0.5-1.5). The compatibilizer comprises polyglycerol-6 octanoate and alkyl glycoside in a mass ratio of 1:(0.3-0.5).

[0006] By employing the above-mentioned technical solutions, pyrethroid insecticides exhibit contact, stomach poison, and neurotoxic effects against mosquitoes. Plant essential oils can be used as synergists in combination with pyrethroid insecticides, further enhancing their efficacy and reducing the likelihood of using chemical insecticides or synergists, thereby reducing environmental pollution and delaying the development of mosquito resistance. Simultaneously, the synergistic effect of pyrethroid insecticides and aromatherapy complexes allows electric mosquito repellent liquids to effectively repel and kill mosquitoes while creating a fresh and fragrant aromatherapy atmosphere, meeting consumers' dual needs for mosquito repellency and scent improvement. Polyglycerol-6 octanoate and alkyl glycosides, acting as compatibilizers, are combined in a specific mass ratio to enhance the compatibility between plant essential oils and pyrethroid insecticides, contributing to microemulsion formation and improving the stability of the mosquito repellent liquid. Both polyglycerol-6 octanoate and alkyl glycosides have dual hydrophilic and lipophilic properties. The hydrophilic group can interact with the polar components in plant essential oils, while the hydrophobic group can interact with non-polar components such as insecticides. This acts as a bridge between plant essential oils and insecticides, reducing the surface tension between different components and allowing them to mix evenly. This effectively solves the problem of poor compatibility between aromatherapy ingredients and insecticide ingredients.

[0007] Preferably, the plant essential oils include lemongrass essential oil, lavender essential oil and bergamot essential oil in a weight ratio of (1-1.2):(0.5-0.8):1.

[0008] By employing the above technical solutions, lemongrass essential oil, with its natural insect-repelling properties, enhances the mosquito-repelling effect of electric mosquito repellent liquid; lavender essential oil has soothing and sleep-aiding effects, helping users relax and improve sleep quality while repelling mosquitoes; bergamot essential oil has a fresh and gentle fruity aroma, effectively improving indoor odors and creating a fresh and fragrant atmosphere. The combination of these three ingredients allows the electric mosquito repellent liquid to possess multiple functions, including mosquito repellent, soothing, and air quality improvement, avoiding the incompatibility issues between aromatherapy and insecticidal components caused by directly adding essential oils, thus meeting consumers' higher demands for quality of life.

[0009] Preferably, the polyglycerol-6 octanoate has an HLB value of 6-8.

[0010] By adopting the above technical solution and using polyglycerol-6 octanoate with an HLB value of 6-8 as a compatibilizer, the plant essential oils in the aromatherapy complex can be better compatible with pyrethroid insecticides and other ingredients, avoiding problems such as stratification, precipitation, or decomposition of the insecticide ingredients, thus ensuring the mosquito repellent effect.

[0011] Preferably, the alkyl glycoside includes one or more of APG0810, APG0814, and APG1214.

[0012] By adopting the above technical solution, the alkyl glycoside has a hydrophilic end of the glycoside and a hydrophobic fatty alkyl chain of suitable length, which has good surface activity and emulsifying properties. It works synergistically with polyglycerol-6 octanoate, thereby helping to form microemulsions and giving mosquito repellent liquid good storage stability.

[0013] Preferably, the pyrethroid insecticide is a compound of chlorpyrifos and permethrin crude oil in a weight ratio of (4.3-4.7):(2-2.5).

[0014] By adopting the above technical solution, the compounding of chlorpyrifos and permethrin crude oil has a good synergistic effect on repelling and killing mosquitoes and flies.

[0015] Preferably, the stabilizer includes one or both of BX composite stabilizer and 264 antioxidant.

[0016] More preferably, the stabilizer comprises a BX composite stabilizer and a 264 antioxidant in a mass ratio of 0.5:0.3.

[0017] By adopting the above technical solution and the above stabilizer compound, the components in the electric mosquito repellent liquid can be effectively prevented from being oxidized, thereby improving the stability and service life of the mosquito repellent liquid.

[0018] Preferably, the soothing agent includes one or more of chamomile extract, gentian extract, and peppermint extract.

[0019] By employing the above-mentioned technical solutions, chamomile extract possesses anti-inflammatory and soothing properties, helping to relax the mind and body and reduce anxiety; gentian extract has a calming and sedative effect, relieving tension; and peppermint extract provides a cooling sensation, effectively relieving fatigue. The soothing agents work synergistically with the aromatherapy complex, enabling the electric mosquito repellent liquid to repel mosquitoes while simultaneously creating a fresh and fragrant atmosphere using the aroma of plant essential oils. The soothing agents further enhance the mood-soothing effect.

[0020] Preferably, the solvent is a mixture of n-tetradecane and IP2838 solvent in a weight ratio of (74-75):(18-18.84).

[0021] Secondly, this application provides a method for preparing a refreshing and fragrant long-lasting electric mosquito repellent liquid, which adopts the following technical solution: A method for preparing a refreshing and fragrant long-lasting electric mosquito repellent liquid includes the following steps: S1. Mix the plant essential oil with the compatibilizer and stir well to form an aromatherapy complex; S2. Add pyrethroid insecticide and stabilizer to the solvent, stir until the pyrethroid insecticide is completely dissolved, add aroma compound, continue stirring, add soothing agent, stir, homogenize and filter to obtain mosquito repellent liquid; fill the mosquito repellent liquid into containers, seal and obtain fresh and fragrant long-lasting electric mosquito repellent liquid.

[0022] Preferably, the viscosity of the refreshing and fragrant long-lasting electric mosquito repellent liquid is ≤10 mPa・s.

[0023] By adopting the above technical solution to control the viscosity of mosquito repellent liquid, the liquid can have good fluidity, ensuring that it can evaporate smoothly in the electric heater, effectively playing its role in repelling mosquitoes and providing aromatherapy, and avoiding the effect of poor evaporation due to excessive viscosity.

[0024] This application has the following beneficial effects: 1. Pyrethroid insecticides have contact, stomach, and neurotoxic effects on mosquitoes. Combining plant essential oils as synergists with pyrethroid insecticides further enhances their efficacy, reducing the need for chemical insecticides or synergists, thus minimizing environmental pollution and delaying the development of mosquito resistance. Simultaneously, the synergistic effect of pyrethroid insecticides and aromatherapy complexes allows electric mosquito repellent liquids to effectively repel and kill mosquitoes while creating a fresh and fragrant aromatherapy atmosphere, meeting consumers' dual needs for mosquito repellency and scent improvement. Polyglycerol-6-octanoate and alkyl glycosides, acting as compatibilizers, when combined in a specific mass ratio, enhance the compatibility between plant essential oils and pyrethroid insecticides, contributing to microemulsion formation and improving the stability of the mosquito repellent liquid. Both polyglycerol-6 octanoate and alkyl glycosides have dual hydrophilic and lipophilic properties. The hydrophilic group can interact with the polar components in plant essential oils, while the hydrophobic group can interact with non-polar components such as insecticides. This acts as a bridge between plant essential oils and insecticides, reducing the surface tension between different components and allowing them to mix evenly. This effectively solves the problem of poor compatibility between aromatherapy ingredients and insecticide ingredients.

[0025] 2. Lemongrass essential oil has natural insect-repelling properties, enhancing the mosquito-repelling effect of electric mosquito repellent liquid; lavender essential oil has soothing and sleep-aiding effects, helping users relax and improve sleep quality while repelling mosquitoes; bergamot essential oil has a fresh and gentle fruity scent, effectively improving indoor odors and creating a fresh and fragrant atmosphere. The combination of these three ingredients allows the electric mosquito repellent liquid to have multiple functions, including mosquito repellent, soothing, and air quality improvement, avoiding the incompatibility issues between aromatherapy and insecticidal ingredients that can occur when essential oils are added directly, thus meeting consumers' higher demands for quality of life. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the embodiments.

[0027] Example 1 The preparation method of a refreshing and fragrant long-lasting electric mosquito repellent liquid includes the following steps: S1. Weigh out the plant essential oil and compatibilizer according to a mass ratio of 1.5:0.5; the plant essential oil is a blend of lemongrass essential oil, lavender essential oil and bergamot essential oil in a mass ratio of 1:0.5:1; the compatibilizer is a blend of polyglycerol-6 octanoate and alkyl glycoside in a mass ratio of 1:0.3; the polyglycerol-6 octanoate has an HLB value of 6 and was purchased from Shandong Binzhou Jinsheng New Material Technology Co., Ltd., CAS No. 51033-35-3; the alkyl glycoside is specifically selected as APG0814.

[0028] Plant essential oils are mixed with a compatibilizer and stirred at 50°C for 20 minutes to form an aromatherapy complex.

[0029] S2. Weigh the raw materials according to the following weight proportions: 0.68 parts of pyrethroid insecticide, 2 parts of aromatherapy complex, 0.6 parts of stabilizer, 0.05 parts of soothing agent, and 92 parts of solvent. The pyrethroid insecticide is a compound of chlorpyrifos and permethrin crude oil in a weight ratio of 4.3:2. The stabilizer includes BX composite stabilizer and 264 anti-aging agent in a mass ratio of 0.5:0.3. BX composite stabilizer is specifically an antioxidant composite stabilizer. The soothing agent is specifically gentian extract. The solvent is a compound of n-tetradecane and IP2838 solvent in a weight ratio of 74:18. IP2838 solvent is specifically isoparaffin solvent 2838.

[0030] Add pyrethroid insecticides and stabilizers to the solvent, and stir for 25 minutes at 35°C and 300 rpm to ensure complete dissolution of the pyrethroid insecticides. Add the aromatherapy complex and continue stirring for 30 minutes. Add gentian extract and stir for 15 minutes at 25°C and 250 rpm. Homogenize for 10 minutes using a high-pressure homogenizer, controlling the system viscosity to ≤10 mPa·s. Filter through a 200-mesh filter to remove impurities and obtain mosquito repellent liquid. Fill the mosquito repellent liquid into containers to obtain a refreshing and fragrant long-lasting electric mosquito repellent liquid.

[0031] Example 2 The preparation method of a refreshing and fragrant long-lasting electric mosquito repellent liquid includes the following steps: S1. Weigh the plant essential oil and compatibilizer according to a mass ratio of 2.5:1; the plant essential oil is a blend of lemongrass essential oil, lavender essential oil and bergamot essential oil in a mass ratio of 1.1:0.7:1; the compatibilizer is a blend of polyglycerol-6 octanoate and alkyl glycoside in a mass ratio of 1:0.4; the polyglycerol-6 octanoate has an HLB value of 7 and was purchased from Shandong Binzhou Jinsheng New Material Technology Co., Ltd., CAS No. 51033-35-3; the alkyl glycoside is specifically selected as APG1214.

[0032] Plant essential oils are mixed with a compatibilizer and stirred at 50°C for 20 minutes to form an aromatherapy complex.

[0033] S2. Weigh the raw materials according to the following weight proportions: 0.77 parts of pyrethroid insecticide, 3.5 parts of aromatherapy compound, 0.7 parts of stabilizer, 0.08 parts of soothing agent, and 93 parts of solvent. The pyrethroid insecticide is a compound of chlorpyrifos and permethrin crude oil in a weight ratio of 4.5:2.3. The stabilizer includes BX compound stabilizer and 264 anti-aging agent in a weight ratio of 0.5:0.3. BX compound stabilizer is specifically an antioxidant compound stabilizer. The soothing agent is specifically peppermint extract. The solvent is a compound of n-tetradecane and IP2838 solvent in a weight ratio of 74.5:18.5. IP2838 solvent is specifically isoparaffin solvent 2838.

[0034] Add pyrethroid insecticides and stabilizers to the solvent, and stir for 25 minutes at 35°C and 300 rpm to ensure complete dissolution of the pyrethroid insecticides. Add the aromatherapy complex and continue stirring for 30 minutes. Add peppermint extract and stir for 15 minutes at 25°C and 250 rpm. Homogenize for 10 minutes using a high-pressure homogenizer, controlling the system viscosity to ≤10 mPa·s. Filter through a 200-mesh filter to remove impurities and obtain mosquito repellent liquid. Fill the mosquito repellent liquid into containers to obtain a refreshing and fragrant long-lasting electric mosquito repellent liquid.

[0035] Example 3 The preparation method of a refreshing and fragrant long-lasting electric mosquito repellent liquid includes the following steps: S1. Weigh the plant essential oil and compatibilizer according to a mass ratio of 3.0:1.5; the plant essential oil is a blend of lemongrass essential oil, lavender essential oil and bergamot essential oil in a mass ratio of 1.2:0.8:1; the compatibilizer is a blend of polyglycerol-6 octanoate and alkyl glycoside in a mass ratio of 1:0.5; the polyglycerol-6 octanoate has an HLB value of 8 and was purchased from Shandong Binzhou Jinsheng New Material Technology Co., Ltd., CAS No. 51033-35-3; the alkyl glycoside is specifically selected as APG0810.

[0036] Plant essential oils are mixed with a compatibilizer and stirred at 50°C for 20 minutes to form an aromatherapy complex.

[0037] S2. Weigh the raw materials according to the following weight proportions: 0.86 parts of pyrethroid insecticide, 4.5 parts of aromatherapy compound, 0.8 parts of stabilizer, 0.1 parts of soothing agent, and 93.74 parts of solvent. The pyrethroid insecticide is a compound of chlorpyrifos and permethrin crude oil in a weight ratio of 4.7:2.5. The stabilizer includes BX composite stabilizer and 264 anti-aging agent in a weight ratio of 0.5:0.3. BX composite stabilizer is specifically an antioxidant composite stabilizer. The soothing agent is specifically chamomile extract. The solvent is a compound of n-tetradecane and IP2838 solvent in a weight ratio of 75:18.74. IP2838 solvent is specifically isoparaffin solvent 2838.

[0038] Add pyrethroid insecticides and stabilizers to the solvent, and stir for 25 minutes at 35°C and 300 rpm to ensure complete dissolution of the pyrethroid insecticides. Add the aromatherapy complex and continue stirring for 30 minutes. Add chamomile extract and stir for 15 minutes at 25°C and 250 rpm. Homogenize for 10 minutes using a high-pressure homogenizer, controlling the system viscosity to ≤10 mPa·s. Filter through a 200-mesh filter to remove impurities and obtain mosquito repellent liquid. Fill the mosquito repellent liquid into containers to obtain a refreshing and fragrant long-lasting electric mosquito repellent liquid.

[0039] Example 4 The difference between this embodiment and Embodiment 3 is that lemongrass essential oil and other essential oils are replaced with peppermint oil.

[0040] Example 5 The difference between this embodiment and Embodiment 3 is that the mass of chlorpyrifos is replaced with permethrin crude oil.

[0041] Example 6 The difference between this embodiment and Embodiment 3 is that polyglycerol-6 octanoate with an HLB value of 14 is used.

[0042] Example 7 The difference between this embodiment and Embodiment 3 is that the alkyl glycoside APG0810 is replaced by a methyl glycoside.

[0043] Comparative Example 1 A refreshing and fragrant long-lasting electric mosquito repellent liquid differs from Example 3 in that it replaces polyglycerol-6 octanoate with fatty acid polyoxyethylene ether by mass.

[0044] Comparative Example 2 A refreshing and fragrant long-lasting electric mosquito repellent liquid differs from Example 3 in that the polyglycerol-6 octanoate is replaced by APG0810.

[0045] Comparative Example 3 A refreshing and fragrant long-lasting electric mosquito repellent liquid differs from Example 3 in that the aromatherapy complex is replaced by plant essential oils. The plant essential oils are a blend of lemongrass essential oil, lavender essential oil, and bergamot essential oil in a mass ratio of 1.2:0.8:1. Performance testing

[0046] The mosquito repellent effects of the mosquito repellent liquids prepared in each embodiment and comparative example were tested according to the closed cylinder method in GB / T 13917.10-2009. The test results are recorded in Table 1.

[0047] The mosquito repellent liquids prepared in Examples 1-7 and Comparative Examples 1-3 were stored at room temperature for 6 months, and the layering and precipitation phenomena of the mosquito repellent liquids were observed. In addition, the mosquito repellent liquids prepared in Examples 1-7 and Comparative Examples 1-3 were centrifuged at 3000 r / min for 30 minutes, and the layering and precipitation phenomena of the mosquito repellent liquids were observed. The results are recorded in Table 1.

[0048] Table 1

[0049] Based on the comparison between Example 3 and Example 5 and the data in Table 1, it can be seen that the mosquito repellent effect of the mosquito repellent liquid in Example 5 is significantly worse than that in Example 3. The reason for this may be that the mosquito repellent liquid in Example 5 uses permethrin crude oil insecticide alone, which has a poor mosquito repellent effect. In contrast, the mosquito repellent liquid using a mixture of permethrin and permethrin crude oil has a better synergistic effect in repelling and killing mosquitoes and flies.

[0050] Based on the comparison between Example 3 and Example 6 and the data in Table 1, it can be seen that: Example 6 uses polyglycerol-6 octanoate with an HLB value of 14, which will reduce the compatibility of plant essential oils and other ingredients in the aromatherapy complex, which may cause the mosquito repellent liquid to separate into layers, and may also decompose the insecticidal ingredients, reduce the mosquito repellent effect, and fail to guarantee the stability and effectiveness of the mosquito repellent liquid.

[0051] Based on the comparison between Example 3 and Example 7 and the data in Table 1, it can be seen that the methyl glycoside in Example 7 has poor compatibility with polyglycerol-6 octanoate, making it difficult to form a microemulsion with plant essential oils. This damages the stability of the aromatherapy and insecticidal components, leading to a deterioration of the mosquito repellent liquid. It is not conducive to the stable and continuous evaporation of the mosquito repellent liquid, thereby reducing its effective action time and range.

[0052] Based on the comparison between Example 3 and Comparative Example 1, and the data in Table 1, it can be seen that: Comparative Example 1, which uses fatty acid polyoxyethylene ether and alkyl glycoside as compatibilizers, may result in a deterioration in the mosquito repellent liquid due to decreased compatibility between the aromatherapy and insecticidal components. This is because the specific mass ratio of polyglycerol-6-octanoate and alkyl glycoside as compatibilizers effectively promotes the integration of plant essential oils with other components, ensuring the stability of the mosquito repellent liquid system. However, fatty acid polyoxyethylene ether may not form an effective synergistic effect with alkyl glycosides, making it difficult to maintain good compatibility between the aromatherapy and insecticidal components. This may lead to stratification and precipitation in the mosquito repellent liquid, or even decomposition of the insecticidal components, reducing the mosquito-repelling effect.

[0053] Based on the comparison between Example 3 and Comparative Example 2, and the data in Table 1, it can be seen that: in Comparative Example 2, alkyl glycoside APG0810 was used alone as a compatibilizer, lacking the synergistic effect of polyglycerol-6-octanoate, which could not achieve the ideal compatibility effect. This could lead to the separation and precipitation of the aromatherapy and insecticidal components, reducing the mosquito-repellent effect. In contrast, in Example 3 of this invention, polyglycerol-6-octanoate and alkyl glycoside were combined in a specific mass ratio as a compatibilizer, which effectively promoted the integration of plant essential oils with other components, ensuring the stability of the mosquito repellent liquid system.

[0054] Based on the comparison between Example 3 and Comparative Example 3, and the data in Table 1, it can be seen that: Comparative Example 3 directly mixes plant essential oils with pyrethroid insecticides, resulting in poor compatibility between the two, leading to uneven fragrance and reduced mosquito repellent effect. In contrast, Example 3 of this application uses polyglycerol-6-octanoate and alkyl glycoside APG0810 as compatibility agents, effectively enhancing the compatibility between plant essential oils and pyrethroid insecticides, facilitating microemulsion formation, and thus improving the stability of the mosquito repellent liquid.

[0055] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A refreshing and fragrant long-lasting electric mosquito repellent liquid, characterized in that, Including the following parts by weight of raw materials: Pyrethroid insecticide 0.68-0.86 parts, aromatherapy compound 2-4.5 parts, stabilizer 0.6-0.8 parts, soothing agent 0.05-0.1 parts, solvent 92-93.84 parts; The raw materials for preparing the aromatherapy complex include plant essential oils and compatibilizers, wherein the mass ratio of the plant essential oils to the compatibilizers is (1.5-3.0):(0.5-1.5). The compatibilizer comprises polyglycerol-6 octanoate and alkyl glycoside in a mass ratio of 1:(0.3-0.5).

2. The refreshing and fragrant long-lasting electric mosquito repellent liquid according to claim 1, characterized in that, The plant essential oils include lemongrass essential oil, lavender essential oil and bergamot essential oil in a weight ratio of (1-1.2):(0.5-0.8):

1.

3. The refreshing and fragrant long-lasting electric mosquito repellent liquid according to claim 1, characterized in that, The HLB value of the polyglycerol-6 octanoate is 6-8.

4. The refreshing and fragrant long-lasting electric mosquito repellent liquid according to claim 1, characterized in that, The alkyl glycoside includes one or more of APG0810, APG0814, and APG1214.

5. The refreshing and fragrant long-lasting electric mosquito repellent liquid according to claim 1, characterized in that, The pyrethroid insecticide is a compound of chlorpyrifos and permethrin crude oil in a weight ratio of (4.3-4.7):(2-2.5).

6. The refreshing and fragrant long-lasting electric mosquito repellent liquid according to claim 1, characterized in that, The stabilizer includes one or both of BX composite stabilizer and 264 antioxidant.

7. The refreshing and fragrant long-lasting electric mosquito repellent liquid according to claim 1, characterized in that, The soothing agents include one or more of chamomile extract, gentian extract, and peppermint extract.

8. The refreshing and fragrant long-lasting electric mosquito repellent liquid according to claim 1, characterized in that, The solvent is prepared by compounding n-tetradecane and IP2838 solvent in a weight ratio of (74-75):(18-18.84).

9. A method for preparing a refreshing and fragrant long-lasting electric mosquito repellent liquid according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Mix the plant essential oil with the compatibilizer and stir well to form an aromatherapy complex; S2. Add pyrethroid insecticide and stabilizer to the solvent, stir until the pyrethroid insecticide is completely dissolved, add aroma compound, continue stirring, add soothing agent, stir, homogenize and filter to obtain mosquito repellent liquid; fill the mosquito repellent liquid into containers, seal and obtain fresh and fragrant long-lasting electric mosquito repellent liquid.

10. The method for preparing a refreshing and fragrant long-lasting electric mosquito repellent liquid according to claim 9, characterized in that, The viscosity of the fresh and fragrant long-lasting electric mosquito repellent liquid is ≤10 mPa・s.

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