A compound plant essential oil composition with mosquito-repelling and itching-relieving effects, and a preparation method and application thereof

Abstract

The application discloses a compound plant essential oil composition with mosquito-repelling and itching-relieving effects and a preparation method and application thereof, and relates to the technical field of plant essential oil applications. The application is composed of the following components in volume percentage: lemon eucalyptus oil 45-55%, citronella oil 20-30%, peppermint oil 10-20% and lemon oil 5-15%, and the sum of the volume percentages of the above components is 100%. The four plant essential oils, i.e. lemon eucalyptus oil, citronella oil, peppermint oil and lemon oil, are compounded by scientific proportioning, wherein the lemon eucalyptus oil and the citronella oil are main mosquito-repelling components and synergize with each other to enhance the mosquito-repelling effect. Experiments show that, under the optimal proportioning, the mosquito-repelling effect of the composition of the application on Aedes albopictus can be sustained for more than 4 hours after the composition is applied to human arms, and is significantly better than that of single essential oil or the composition with non-optimal proportioning. The application realizes the mosquito-repelling function and also has good itching-relieving and soothing effects.

Description

Technical Field

[0001] This invention belongs to the field of plant essential oil application technology, specifically a compound plant essential oil composition with mosquito repellent and antipruritic effects, its preparation method and application. Background Technology

[0002] Mosquito bites not only cause discomfort such as skin redness, swelling, and itching, but are also a major transmission route for many mosquito-borne infectious diseases, including dengue fever, malaria, and Zika virus. Therefore, developing safe and effective mosquito repellent products is of significant public health importance.

[0003] Currently, mosquito repellent products on the market mainly fall into two categories: chemical repellents and plant-based repellents. Chemical repellents typically use ingredients such as DEET and IR3535, offering good mosquito-repelling effects. However, some consumers are concerned about potential skin irritation and environmental impacts from long-term use. Plant-based repellents primarily use natural plant essential oils such as citronella oil, eucalyptus oil, peppermint oil, and lemon oil as their active mosquito-repelling ingredients. These oils work by creating an odor barrier through evaporation, achieving a mosquito-repelling effect. Existing plant-based mosquito repellent products are mostly prepared using single plant essential oils or simple mixtures, and come in various forms including mosquito repellent sprays, liquids, creams, and roll-on oils.

[0004] However, existing plant-based mosquito repellent products still have the following shortcomings:

[0005] 1. Single plant essential oils have limited mosquito-repelling effects, a narrow mosquito-repelling spectrum, and a short duration of action;

[0006] 2. Most plant-based mosquito repellent products evaporate quickly, resulting in insufficient effective protection time;

[0007] 3. Existing plant-based mosquito repellent products mainly address the problem of mosquito repellency, but they do not improve symptoms such as redness, swelling, and itching after mosquito bites.

[0008] 4. Some compound product formulas lack scientific ratio design, and the synergistic effect between the components is not obvious;

[0009] 5. Existing natural mosquito repellent products struggle to achieve a balance between mosquito repellent effectiveness, pleasant scent, and skin compatibility.

[0010] Therefore, developing a pure natural plant essential oil composition that combines highly effective mosquito repellency with good antipruritic effects, and whose components have synergistic effects, has important practical significance and application value.

[0011] The information disclosed above in this background section is only for enhancing the understanding of the background section of this invention, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0012] The purpose of this invention is to provide a compound plant essential oil composition with mosquito repellent and antipruritic effects, its preparation method and application, in order to solve the problems of unstable mosquito repellent effect, short duration and lack of antipruritic function of existing natural mosquito repellent products.

[0013] To achieve the above objectives, the present invention provides the following technical solution: a compound plant essential oil composition with mosquito repellent and antipruritic effects, which is composed of the following components by volume percentage: 45% to 55% lemon eucalyptus oil, 20% to 30% citronella oil, 10% to 20% peppermint oil, and 5% to 15% lemon oil, wherein the sum of the volume percentages of the above components is 100%.

[0014] Preferably, it is composed of the following components by volume percentage: 50% lemon eucalyptus oil, 25% lemongrass oil, 15% peppermint oil, and 10% lemon oil.

[0015] Preferably, the lemon eucalyptus oil is an essential oil obtained by steam distillation of lemon eucalyptus; the lemongrass oil is an essential oil obtained by steam distillation of lemongrass; the peppermint oil is an essential oil obtained by steam distillation of peppermint; and the lemon oil is an essential oil obtained by pressing or distillation of lemon peel.

[0016] The present invention also provides a method for preparing the compound plant essential oil composition as described above, comprising the following steps: weighing lemon eucalyptus oil, lemongrass oil, peppermint oil and lemon oil according to the volume percentage, placing them in a mixing container, and stirring and mixing at room temperature until the components are evenly mixed to obtain the compound plant essential oil composition.

[0017] Preferably, the stirring speed is 200-600 rpm and the stirring time is 10-30 minutes.

[0018] The present invention also provides the use of the compound plant essential oil composition as described above in the preparation of mosquito repellent products.

[0019] The present invention also provides the use of the compound plant essential oil composition as described above in the preparation of antipruritic products.

[0020] The present invention also provides the use of the compound plant essential oil composition as described above in the preparation of mosquito repellent and anti-itch care products.

[0021] Preferably, the application includes using the compound plant essential oil composition as an active ingredient, with or without the addition of excipients, to prepare mosquito repellent sprays, mosquito repellent roll-on oils, mosquito repellent creams, skin care oils, mosquito repellent lotions, or other mosquito repellent care products.

[0022] The present invention also provides a mosquito repellent and anti-itch product comprising the compound plant essential oil composition described above.

[0023] Preferably, the product is in the form of mosquito repellent spray, mosquito repellent roll-on oil, mosquito repellent cream, skin oil, or mosquito repellent lotion.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This invention scientifically combines four plant essential oils—lemon eucalyptus oil, citronella oil, peppermint oil, and lemon oil—in a balanced ratio. Lemon eucalyptus oil and citronella oil serve as the main mosquito-repellent components, synergistically enhancing their mosquito-repellent effect. Experiments show that, under optimal ratios, the composition of this invention, when applied to the human arm, provides mosquito repellency against Aedes albopictus for over 4 hours, significantly superior to single essential oils or compositions with suboptimal ratios. When the proportion of lemon eucalyptus oil is reduced to 45%, the mosquito-repellent duration is shortened to 3.5 hours; when the proportion is increased to 55%, the mosquito-repellent duration is only about 3 hours. This demonstrates that the components can achieve optimal synergistic effects within a specific ratio range.

[0026] 2. This invention, while achieving mosquito repellent function, also has a good antipruritic and soothing effect. Menthol in peppermint oil produces a cooling sensation, reducing itching and discomfort caused by mosquito bites through a cooling sensation transfer mechanism. Experiments show that spraying the composition of this invention immediately after a mosquito bite significantly relieves or eliminates itching within approximately 2-3 minutes.

[0027] 3. This invention enhances the longevity of mosquito repellent effect by combining citronella oil and lemon eucalyptus oil, effectively solving the problems of rapid evaporation and insufficient effective protection time of existing plant-based mosquito repellent products; by improving the overall smell with lemon oil, the product has a fresh and pleasant natural lemon aroma, while promoting the volatilization and diffusion of active ingredients, thus improving the comfort and acceptability of the product.

[0028] 4. This invention uses all natural plant essential oils as active ingredients, without adding any chemically synthesized mosquito repellents. It is gentle and non-irritating to human skin, easily degrades in the environment, and is safe for non-target organisms. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] Example 1:

[0031] This embodiment provides a compound plant essential oil composition with mosquito-repellent and antipruritic effects, the components and volume percentages of which are as follows:

[0032] Lemon eucalyptus oil: 50%

[0033] Citronella oil: 25%

[0034] Peppermint oil: 15%

[0035] Lemon oil: 10%

[0036] Preparation method: Weigh the above four plant essential oils according to volume percentage, place them in a mixing container, and stir and mix at 400 rpm for 20 minutes at room temperature until all components are mixed evenly to obtain a compound plant essential oil composition.

[0037] Example 2:

[0038] This embodiment provides a compound plant essential oil composition with mosquito-repellent and antipruritic effects, the components and volume percentages of which are as follows:

[0039] Lemon eucalyptus oil: 45%

[0040] Lemongrass oil: 30%

[0041] Peppermint oil: 15%

[0042] Lemon oil: 10%

[0043] The preparation method is the same as in Example 1.

[0044] Example 3:

[0045] This embodiment provides a compound plant essential oil composition with mosquito-repellent and antipruritic effects, the components and volume percentages of which are as follows:

[0046] Lemon eucalyptus oil: 55%

[0047] Citronella oil: 20%

[0048] Peppermint oil: 15%

[0049] Lemon oil: 10%

[0050] The preparation method is the same as in Example 1.

[0051] I. Mosquito Repellent Effect Test

[0052] Experimental Method: The human arm mosquito repellency test was conducted. One hundred laboratory-bred Aedes albopictus mosquitoes were placed in a mosquito cage. The subject's arm was evenly coated with the test sample and then placed inside the mosquito cage for observation. The time of first noticeable failure and the number of bites were recorded.

[0053] The experimental results are shown in the table below:

[0054] Example 1 50 / 25 / 15 / 10 Approximately 4 hours 4 Example 2 45 / 30 / 15 / 10 Approximately 3.5 hours 6 Example 3 55 / 20 / 15 / 10 Approximately 3 hours 11

[0055] Example 1 maintained good mosquito-repellent effect for 4 hours after the start of the test, with only 4 bites. Example 2 showed obvious bites after about 3.5 hours, with a total of 6 bites. Example 3 showed obvious bites after about 3 hours, with a total of 11 bites.

[0056] The experimental results show that both too low and too high a proportion of lemon eucalyptus oil will lead to a decrease in mosquito repellent effect. Example 1 has the best mosquito repellent effect, indicating that the components can form the best synergistic effect when the proportion range is 50 / 25 / 15 / 10.

[0057] II. Antipruritic effect test

[0058] Experimental method: After being bitten by Aedes albopictus, the subjects applied the compound plant essential oil composition of Example 1 of this invention to the bite site and recorded the time for relief of itching.

[0059] Test results: The itching sensation in the subjects was significantly reduced or disappeared within about 2 to 3 minutes after spraying.

[0060] The results showed that the antipruritic effect was consistent with the mechanism by which menthol in peppermint oil produces a cooling sensation and diverts the itching sensation. Itching after mosquito bites is related to local nerve stimulation and histamine response; the cooling sensation can effectively relieve itching discomfort. This indicates that in addition to its mosquito-repellent function, the present invention also has a good antipruritic and soothing effect.

[0061] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above description is illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A compound plant essential oil composition with mosquito-repellent and antipruritic effects, characterized in that: It is composed of the following components by volume percentage: 45%–55% lemon eucalyptus oil, 20%–30% lemongrass oil, 10%–20% peppermint oil, and 5%–15% lemon oil, with the sum of the volume percentages of the above components being 100%.

2. The compound plant essential oil composition with mosquito-repellent and antipruritic effects according to claim 1, characterized in that: It consists of the following components by volume percentage: 50% lemon eucalyptus oil, 25% lemongrass oil, 15% peppermint oil, and 10% lemon oil.

3. A compound plant essential oil composition with mosquito-repellent and antipruritic effects according to claim 1 or 2, characterized in that: The lemon eucalyptus oil is an essential oil obtained by steam distillation of lemon eucalyptus; the lemongrass oil is an essential oil obtained by steam distillation of lemongrass; the peppermint oil is an essential oil obtained by steam distillation of peppermint; and the lemon oil is an essential oil obtained by pressing or distillation of lemon peel.

4. A method for preparing the compound plant essential oil composition according to any one of claims 1 to 3, characterized in that, Includes the following steps: After weighing lemon eucalyptus oil, lemongrass oil, peppermint oil and lemon oil according to the stated volume percentages, place them in a mixing container and stir and mix them at room temperature until all components are evenly mixed to obtain the composite plant essential oil composition.

5. The preparation method according to claim 4, characterized in that, The stirring speed is 200-600 rpm, and the stirring time is 10-30 minutes.

6. The use of the compound plant essential oil composition according to any one of claims 1 to 3 in the preparation of mosquito repellent products.

7. The use of the compound plant essential oil composition according to any one of claims 1 to 3 in the preparation of antipruritic products.

8. The use of the compound plant essential oil composition according to any one of claims 1 to 3 in the preparation of mosquito repellent and antipruritic care products.

9. A mosquito repellent and anti-itch product, characterized in that, It comprises the compound plant essential oil composition as described in any one of claims 1 to 3.

10. The mosquito repellent and antipruritic product according to claim 9, characterized in that, The product is available in the form of mosquito repellent spray, mosquito repellent roll-on oil, mosquito repellent cream, skin oil, or mosquito repellent lotion.