Natural plant air freshener based on agilawood essential oil and preparation method thereof

Abstract

The invention belongs to the technical field of air fresheners, and particularly relates to a natural plant air freshener based on agilawood essential oil and a preparation method of the natural plant air freshener. In the air freshener disclosed by the invention, the agilawood essential oil, the synergistic plant essential oil, the natural solvent and the antioxidant are all natural-sourced components, are friendly to human bodies and the environment, and are non-toxic and harmless. The embodiment verifies that the selected slow-release carrier can effectively prolong the fragrance holding time, after the agilawood essential oil and the synergistic plant essential oil are combined, the oxidation resistance of the agilawood essential oil can be effectively improved, and the air freshener has the effects of removing peculiar smell, inhibiting escherichia coli / staphylococcus aureus and relieving anxiety.

Description

Technical Field

[0001] The present invention belongs to the technical field of air fresheners, and particularly relates to a natural plant air freshener based on agarwood essential oil and a preparation method thereof. Background Art

[0002] Air fresheners first appeared abroad in the early 1970s and are mainly used in cars, bedrooms or living rooms at home, hotels, restaurants, and other public entertainment places. The basic preparation principle is to mix essence, deodorant, bactericidal and disinfectant agents with components such as water, thickener, preservative, emulsifier, etc. to form a solid jelly-like substance. As the water volatilizes, components such as essence slowly disperse into the air to achieve the purpose of making the air fragrant and fresh.

[0003] Most air fresheners on the market rely on chemically synthesized essences and volatile organic compounds (VOCs), but these substances have problems such as pungent odors, sensitization risks, and environmental pollution. Although natural plant essential oil-based air fresheners perform better in terms of safety, they generally have a short fragrance retention time and relatively single functions, mainly limited to covering up odors. Agarwood essential oil shows significant development potential due to its unique woody aroma and antibacterial and sedative effects. However, when used alone, agarwood essential oil is not only costly but also has a relatively fast volatilization rate. Therefore, there is an urgent need to develop a formula that combines agarwood essential oil with other natural ingredients to synergistically enhance the effects, in order to achieve multiple functions such as long-lasting air purification, antibacterial and bacteriostatic effects, and mood regulation, thereby improving the overall performance and user experience of air fresheners. Summary of the Invention

[0004] The purpose of the present invention is to provide an agarwood air freshener that is natural, environmentally friendly, has a long-lasting fragrance, and combines air purification and health effects, and solves the health risks of chemically synthesized air fresheners and the problem of single functions of natural essential oil-based products.

[0005] The present invention provides a natural air freshener based on agarwood essential oil, and the air freshener comprises the following components: 30%wt - 50%wt of agarwood essential oil, 10%wt - 20%wt of synergistic plant essential oil, 25%wt - 40%wt of natural solvent, 5%wt - 10%wt of sustained-release carrier, 0.5%wt - 2%wt of antioxidant; the synergistic plant essential oil is two or more of tea tree essential oil, lavender essential oil, and lemon essential oil; the sustained-release carrier is single-6-O-amino-β-cyclodextrin.

[0006] Preferably, the synergistic plant essential oil is lemon essential oil and tea tree essential oil; or lemon essential oil and lavender essential oil; or lemon essential oil, tea tree essential oil, and lavender essential oil.

[0007] Preferably, the natural solvent is ethanol or propylene glycol.

[0008] Preferably, the antioxidant is vitamin E or rosemary extract.

[0009] Preferably, the air freshener is of spray type.

[0010] The present invention also provides a method for preparing the air freshener described in the above technical solution, the method comprising the following steps: The agarwood essential oil is mixed with the synergistic plant essential oil, and stirred at a constant temperature of 40°C to 50°C for 20 to 30 minutes to obtain an essential oil mixture; mono-6-O-amino-β-cyclodextrin is mixed with a natural solvent to obtain a carrier solution; the essential oil mixture is added to the carrier solution, and primary stirring is performed, and then an antioxidant is added, and secondary stirring is performed for 10 to 15 minutes. After filling, the solution is stored away from light.

[0011] Preferably, the constant temperature stirring condition is 300-500 rpm.

[0012] Preferably, the primary stirring condition is 400-600 rpm, and the primary stirring time is 30-60 min.

[0013] Preferably, the secondary stirring condition is 300-500 rpm, and the secondary stirring time is 10-15 min.

[0014] Beneficial effects of the present invention: In the air freshener of the present invention, the agarwood essential oil, the synergistic plant essential oil, the natural solvent and the antioxidant are all ingredients of natural origin, friendly to the human body and the environment, and non-toxic and harmless. It has been verified by the examples that the slow-release carrier selected by the present invention can effectively prolong the fragrance retention time, and the combination of the agarwood essential oil and the synergistic plant essential oil can effectively improve its antioxidant performance. The air freshener provided by the present invention has the functions of removing odor, inhibiting Escherichia coli / Staphylococcus aureus and relieving anxiety. DETAILED DESCRIPTION

[0015] In order to further illustrate the present invention, the scheme provided by the present invention is described in detail below in conjunction with embodiments, but they should not be understood as limiting the protection scope of the present invention.

[0016] In the examples of the present invention, mono-6-O-amino-β-cyclodextrin was purchased from Xi'an Qiyue Biotechnology Co., Ltd. with a CAS number of 29390-67-8.

[0017] Unless otherwise specified, the materials used in the examples of the present invention are all conventional commercially available products.

[0018] Example 1 Take 40 g of agarwood essential oil, mix it with 5 g of lemon essential oil and 5 g of tea tree essential oil, stir at a constant temperature of 45 °C for 25 min to obtain an essential oil mixture; mix 6 g of mono-6-O-amino-β-cyclodextrin with 43 g of ethanol to obtain a carrier solution; slowly add the essential oil mixture to the carrier solution while stirring (stir at 500 rpm for 45 min), then add 1 g of vitamin E, adjust the stirring speed to 400 rpm and continue stirring for 10 min, and obtain an air freshener spray after filling.

[0019] Example 2 Take 30 g of agarwood essential oil, mix it with 10 g of lemon essential oil and 10 g of lavender essential oil, stir at a constant temperature of 45 °C for 30 min to obtain an essential oil mixture; mix 10 g of mono-6-O-amino-β-cyclodextrin with 39 g of ethanol to obtain a carrier solution; slowly add the essential oil mixture to the carrier solution while stirring (stir at 500 rpm for 45 min), then add 1 g of vitamin E, adjust the stirring speed to 400 rpm and continue stirring for 10 min, and obtain an air freshener spray after filling.

[0020] Example 3 Take 50 g of agarwood essential oil, mix it with 5 g of lemon essential oil, 5 g of tea tree essential oil and 5 g of lavender essential oil, stir at a constant temperature of 45 °C for 30 min to obtain an essential oil mixture; mix 10 g of mono-6-O-amino-β-cyclodextrin with 24 g of propylene glycol to obtain a carrier solution; slowly add the essential oil mixture to the carrier solution while stirring (stir at 500 rpm for 45 min), then add 1 g of vitamin E, adjust the stirring speed to 400 rpm and continue stirring for 10 min, and obtain an air freshener spray after filling.

[0021] Example 4 Take 40 g of agarwood essential oil, mix it with 5 g of lemon essential oil and 5 g of tea tree essential oil, stir at a constant temperature of 45 °C for 25 min to obtain an essential oil mixture; mix 6 g of mono-6-O-amino-β-cyclodextrin with 43 g of ethanol to obtain a carrier solution; slowly add the essential oil mixture to the carrier solution while stirring (stir at 500 rpm for 45 min), then add 1 g of rosemary extract, adjust the stirring speed to 400 rpm and continue stirring for 10 min, and obtain an air freshener spray after filling.

[0022] Comparative Example 1 The difference from Example 1 is that β-cyclodextrin is used as a sustained-release carrier, specifically as follows: Take 40 g of agarwood essential oil, mix it with 5 g of lemon essential oil and 5 g of tea tree essential oil, stir at a constant temperature of 45 °C for 25 min to obtain an essential oil mixture; mix 6 g of β-cyclodextrin with 43 g of ethanol to obtain a carrier solution; slowly add the essential oil mixture to the carrier solution while stirring (stir at 500 rpm for 45 min), then add 1 g of vitamin E, adjust the stirring speed to 400 rpm and continue stirring for 10 min, and obtain an air freshener spray after filling.

[0023] Comparative Example 2 The difference from Example 1 is that no sustained-release carrier is used, and the details are as follows: Take 40 g of agarwood essential oil, mix it with 5 g of lemon essential oil and 5 g of tea tree essential oil, stir at a constant temperature of 45 °C for 25 min to obtain an essential oil mixture; slowly add the essential oil mixture to 49 g of ethanol while stirring (stir at 500 rpm for 45 min), then add 1 g of vitamin E, adjust the stirring speed to 400 rpm and continue stirring for 10 min, and obtain an air freshener spray after filling.

[0024] Comparative Example 3 The difference from Example 1 is that no synergistic plant essential oil is used, and the details are as follows: Take 50 g of agarwood essential oil and stir at a constant temperature of 45 °C for 25 min; mix 6 g of mono-6-O-amino-β-cyclodextrin with 43 g of ethanol to obtain a carrier solution; slowly add the stirred agarwood essential oil to the carrier solution while stirring (stir at 500 rpm for 45 min), then add 1 g of vitamin E, adjust the stirring speed to 400 rpm and continue stirring for 10 min, and obtain an air freshener spray after filling.

[0025] Comparative Example 4 The difference from Example 1 is that tea tree essential oil and lavender essential oil are used as synergistic plant essential oils, and the details are as follows: Take 40 g of agarwood essential oil, mix it with 5 g of tea tree essential oil and 5 g of lavender essential oil, stir at a constant temperature of 45 °C for 25 min to obtain an essential oil mixture; mix 6 g of mono-6-O-amino-β-cyclodextrin with 43 g of ethanol to obtain a carrier solution; slowly add the essential oil mixture to the carrier solution while stirring (stir at 500 rpm for 45 min), then add 1 g of vitamin E, adjust the stirring speed to 400 rpm and continue stirring for 10 min, and obtain an air freshener spray after filling.

[0026] Test Example 1 Take the air fresheners of Examples 1 to 4 and Comparative Examples 1 to 2 as samples respectively, and detect their fragrance retention time and stability.

[0027] Closed Space Experiment Spray each group of samples evenly in each enclosed space, and use an odor detection instrument to detect and evaluate the odor intensity in each enclosed space at different times after spraying, and count the fragrance retention time.

[0028] Open space experiment Spray each group of samples evenly in several identical open spaces, and use an odor detection instrument to detect and evaluate the odor intensity in each area at different times after spraying, and count the fragrance retention time.

[0029] The fragrance retention times of each group of samples in the enclosed space and the open space are shown in Table 1.

[0030] Table 1 Fragrance retention time of air freshener

[0031] As can be seen from Table 1, the air freshener spray prepared by the present invention has a long-lasting fragrance retention. After the air fresheners of Examples 1 to 4 are sprayed in the enclosed space, the fragrance retention time can reach 6 days. After being sprayed in the open space, the fragrance retention time can also reach more than 48 hours; compared with Comparative Example 1 and Comparative Example 2, there is a significant improvement. It can be seen that the use of a sustained-release carrier in this application can effectively extend the fragrance retention time of the air freshener. When using single-6-O-amino-β-cyclodextrin as the sustained-release carrier, it is more conducive to extending the fragrance retention time than conventional β-cyclodextrin.

[0032] Test Example 2 Antibacterial experiment Take the air fresheners prepared in Examples 1 to 4 and Comparative Examples 3 to 4 as samples respectively, and detect their antibacterial effects according to the method recorded in (Lu Zheng. Research on the antibacterial effect of Artemisia argyi volatile oil air freshener [J]. Lishizhen Medicine and Materia Medica Research, 2011, 22(09): 2179-2180.). The results are shown in Table 2.

[0033] Table 2 Diameter of antibacterial zone of air freshener

[0034] As can be seen from Table 2, compared with the comparative examples, the diameters of the antibacterial zones of Examples 1 to 4 have increased significantly, indicating that the use of the synergistic plant essential oil in the present invention can synergistically act with agarwood essential oil to enhance its antibacterial ability; Comparative Example 4 did not use lemon essential oil, and the result was only a lower impact on the antibacterial effect against Enterococcus, indicating that the synergistic effect of lemon essential oil and agarwood essential oil is better than that of lavender essential oil, and it is more conducive to improving the antibacterial effect of agarwood essential oil.

[0035] Although the above embodiments have described the present invention in detail, they are only a part of the embodiments of the present invention, rather than all of them. People can also obtain other embodiments based on these embodiments without creative efforts, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A natural air freshener based on agarwood essential oil, characterized in that, The air freshener comprises the following components: 30%wt - 50%wt of agarwood essential oil, 10%wt - 20%wt of synergistic plant essential oil, 25%wt - 40%wt of natural solvent, 5%wt - 10%wt of sustained-release carrier, 0.5%wt - 2%wt of antioxidant; The synergistic plant essential oil is two or more of tea tree essential oil, lavender essential oil, and lemon essential oil; The sustained-release carrier is mono-6-O-amino-β-cyclodextrin.

2. The air freshener according to claim 1, wherein The synergistic plant essential oil is lemon essential oil and tea tree essential oil; or lemon essential oil and lavender essential oil; or lemon essential oil, tea tree essential oil, and lavender essential oil.

3. The air freshener according to claim 1, characterized in that, The natural solvent is ethanol or propylene glycol.

4. The air freshener according to claim 1, characterized in that, The antioxidant is vitamin E or rosemary extract.

5. The air freshener according to claim 1, characterized in that, The air freshener is of spray type.

6. The preparation method of the air freshener according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: Mix the agarwood essential oil with the synergistic plant essential oil, and stir at a constant temperature of 40°C - 50°C for 20 - 30 min to obtain an essential oil mixture; Mix mono-6-O-amino-β-cyclodextrin with the natural solvent to obtain a carrier solution; Add the essential oil mixture into the carrier solution, conduct primary stirring, then add the antioxidant, conduct secondary stirring for 10 - 15 min, and store in the dark after filling.

7. The method according to claim 6, wherein The conditions for the constant-temperature stirring are 300 - 500 rpm.

8. The method according to claim 6, characterized in that, The conditions for the primary stirring are 400 - 600 rpm, and the time for the primary stirring is 30 - 60 min.

9. The method according to claim 6, characterized in that The conditions for the secondary stirring are 300 - 500 rpm, and the time for the secondary stirring is 10 - 15 min.

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