Gemini quaternary ammonium salt cationic surface active agent and preparation and application thereof

Abstract

The invention belongs to the technical field of daily chemical industry, and particularly relates to a Gemini quaternary ammonium salt cationic surfactant as well as preparation and application thereof. The Gemini quaternary ammonium salt cationic surface active agent is designed and synthesized aiming at the defect that a traditional zwitterionic surface active agent compound type solubilizer is poor in solubilizing effect or poor in formula stability, the synthesis condition is mild, and the large-scale production potential is achieved. The Gemini quaternary ammonium salt is compounded with the anionic surfactant to obtain the composite solubilizer, and by virtue of the electrostatic interaction of two quaternary ammonium cations of the Gemini quaternary ammonium salt and the anionic surfactant, the molecular arrangement is tighter, and the surface activity efficiency is synergistically improved. The composite solubilizer is excellent in solubilizing effect and good in formula compatibility and storage stability, and the solubility and dispersity of oil-soluble essence and insoluble animal and plant extracts in water can be improved. The water-based aromatherapy liquid is applied to preparation of water-based aromatherapy liquid, can overcome the defect that traditional fire-free aromatherapy is inflammable, and is soft and harmonious in fragrance and better in stability.

Description

Technical Field

[0001] This invention belongs to the field of daily chemical technology, specifically relating to a Gemini quaternary ammonium salt cationic surfactant and its preparation and application. Background Technology

[0002] Flameless diffusers, as a mainstream product in the global aromatherapy market, rely heavily on volatile solvent systems for their core carrier technology. They typically use organic solvents such as isoalkanes, DPM / DPMA / MMB / ACM as fragrance carriers, combined with porous media like reeds, crystals, or plaster as diffusers. Through capillary action, the continuous and slow release of fragrance molecules is achieved via the capillary network within the porous diffuser material. However, due to the extensive use of organic solvents as fragrance carriers, flameless diffusers are highly flammable, especially in enclosed spaces where the volatile concentration is high. Exposure to open flames or high temperatures can easily cause flash fires, significantly limiting their application scenarios.

[0003] Water-based flameless aromatherapy products are gaining increasing prominence in the aromatherapy market due to their core advantages such as safety, environmental friendliness, and ease of use, especially in homes, offices, and cars. Despite the rapid growth of the water-based aromatherapy market, it still faces four key issues that hinder its further popularization: (1) short fragrance retention time; (2) poor solubility and stability of essential oils; (3) risk of microbial contamination; and (4) insufficient environmental adaptability. Among these, the solubility and stability of essential oils are particularly prominent, directly affecting the aroma release effect and shelf life of the aromatherapy products. Traditional methods using anionic and cationic surfactants as a compound solubilizer attempt to improve solubility, but generally suffer from unsatisfactory solubilization effects or poor formulation stability, failing to fundamentally solve the above problems.

[0004] Therefore, this invention aims to synthesize Gemini quaternary ammonium salt cationic surfactants through molecular structure design. With its unique molecular configuration, it can improve the solubility and dispersibility of oil-soluble fragrances and various poorly soluble plant and animal extracts in water, while enhancing the storage stability of the formula. This will specifically address the core technical bottleneck of water-based flameless aromatherapy and promote its market penetration. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention addresses the unsatisfactory solubilizing effect or poor formulation stability of traditional anionic and cationic surfactant compound solubilizers. A Gemini quaternary ammonium salt cationic surfactant is designed and synthesized from a molecular structure perspective. The synthesis conditions are relatively mild, and it has the potential for large-scale production. This Gemini is then compounded with anionic surfactants to obtain composite solubilizers. Utilizing the electrostatic interaction between the two quaternary ammonium cations in the Gemini quaternary ammonium salt cationic surfactant and the anionic surfactant, the intermolecular arrangement of the composite solubilizer is more compact, synergistically improving the surface activity efficiency of the solubilizer. This composite solubilizer exhibits excellent solubilizing effect, good formulation compatibility, and long-term storage stability, and can be used to improve the solubility and dispersibility of oil-soluble fragrances and various poorly soluble plant and animal extracts in water.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A first aspect of the present invention provides a Gemini quaternary ammonium salt cationic surfactant having a structure as shown in Formula 1: ; In the formula, R1 is a C2-C8 alkyl group and R2 is a C2-C4 alkyl group.

[0007] The Gemini quaternary ammonium salt cationic surfactant prepared in this invention contains quaternary ammonium groups and short-chain alkyl chains in its molecular structure, meaning it simultaneously possesses hydrophilic and lipophilic groups. This promotes the solubility and dispersibility of oil-soluble fragrances and various poorly soluble plant and animal extracts in water. Furthermore, the presence of the two quaternary ammonium groups lays the foundation for its excellent solubilizing properties when compounded with anionic surfactants.

[0008] Preferably, the Gemini quaternary ammonium salt cationic surfactant is selected from at least one of the following compounds: .

[0009] The second aspect of this invention also provides a method for preparing the Gemini quaternary ammonium salt cationic surfactant described in the first aspect, specifically comprising the following steps: dissolving raw material A (as shown in Formula 2) in acetonitrile in a container equipped with a reflux device, and preheating to 50-70°C; simultaneously dissolving raw material B (as shown in Formula 3) in acetonitrile, and then adding it to the container to undergo a quaternization reaction with raw material A; after the reaction is completed, the product solution is purified to obtain a white solid product, which is the Gemini quaternary ammonium salt cationic surfactant. ; In the formula, R1 is a C2-C8 alkyl group and R2 is a C2-C4 alkyl group.

[0010] Preferably, the molar ratio of raw material A to raw material B is 1:2-2.2.

[0011] Preferably, raw material B is added dropwise over a period of 20-40 minutes; the quaternization reaction is carried out under stirring for 1-3 hours at a stirring speed of 400-600 rpm.

[0012] Preferably, the specific purification method is as follows: the product is subjected to reduced pressure rotary evaporation at 50-70℃ to remove organic solvents, washed with ethanol 3-5 times and rotary evaporated again, and then the product is dried at 60℃ for 24-72 h to remove residual raw materials.

[0013] A third aspect of the present invention also provides a composite solubilizer, the composite solubilizer comprising the Gemini quaternary ammonium salt cationic surfactant and the anionic surfactant described in the first aspect.

[0014] Preferably, the anionic surfactant includes sulfonate, sulfate, carboxylate, or phosphate anionic surfactants.

[0015] More preferably, the sulfonate anionic surfactant includes at least one of C10-C14 linear alkylbenzene sulfonate sodium salt; the sulfate anionic surfactant includes at least one of C12-C16 alkyl sulfate sodium salt; the carboxylate anionic surfactant includes at least one of sodium laurylate, sodium stearate, and C12-14 alkyl ether carboxylate sodium salt; and the phosphate ester anionic surfactant includes at least one of C12-C18 fatty alcohol phosphate ester salt.

[0016] Preferably, in the composite solubilizer, based on the total weight of the composite solubilizer, the weight percentages of each component are as follows: Anionic surfactants: 20%-80%; Cationic surfactants: 20%-80%.

[0017] A fourth aspect of the present invention also provides a water-based slow-release aromatherapy liquid, wherein the water-based slow-release aromatherapy liquid comprises the composite solubilizer, aroma-releasing component, ethanol and water described in the third aspect; Based on the total weight of the aromatherapy liquid, the weight percentages of each component are as follows: compound solubilizer 1-20%, fragrance-releasing component 1-10%, ethanol 0-15%, and water to make up to 100%.

[0018] Preferably, the fragrance-releasing component is a fragrance or essential oil.

[0019] More preferably, the fragrance-releasing components include osmanthus fragrance, rose fragrance, sandalwood fragrance, freesia fragrance, bluebell fragrance, lemon essential oil, bergamot essential oil, basil essential oil, citrus essential oil, and tea tree essential oil.

[0020] Furthermore, the composite solubilizer prepared by this invention can be used to improve the solubility and dispersibility of oil-soluble fragrances and various poorly soluble plant and animal extracts in water.

[0021] The fifth aspect of the present invention also provides a method for preparing the water-based slow-release aromatherapy liquid described in the fourth aspect, specifically including the following steps: after mixing the composite solubilizer, the aroma-releasing component and ethanol, add water of 1 / 5 to 1 / 3 of the total water volume, continue stirring until there are no obvious solubilizer particles in the solution, the solution is clear and there is no significant turbidity, and finally add the remaining water to obtain the target system.

[0022] Furthermore, the water-based slow-release fragrance liquid prepared by this invention can be used as a flameless fragrance liquid, a deodorizing (odor) spray fragrance liquid, etc.

[0023] Compared with the prior art, the beneficial effects of the present invention are: This invention addresses the shortcomings of traditional cationic and anionic surfactant-based solubilizers, which suffer from unsatisfactory solubilization effects or poor formulation stability. It synthesizes a Gemini quaternary ammonium salt cationic surfactant through molecular structure design, employing mild synthesis conditions and possessing large-scale production potential. This surfactant is then compounded with anionic surfactants to prepare a composite solubilizer. Utilizing the electrostatic interaction between the two quaternary ammonium cations in the Gemini quaternary ammonium salt cationic surfactant and the anionic surfactant, the composite solubilizer molecules are more tightly packed, synergistically enhancing surface activity efficiency. This composite solubilizer exhibits excellent solubilization effects, good formulation compatibility, and long-term storage stability, improving the solubility and dispersibility of oil-soluble fragrances and various poorly soluble plant and animal extracts in water. Its application in the preparation of water-based aromatherapy liquids overcomes the flammability drawbacks of traditional flameless aromatherapy products, producing a softer, more harmonious fragrance and significantly optimizing the sensory experience; furthermore, its superior stability greatly expands its practical application scenarios.

[0024] Specifically, the present invention has the following advantages: (1) The Gemini quaternary ammonium salt cationic surfactant prepared by the present invention contains two quaternary ammonium salt groups in its molecular structure, has excellent solubilizing effect, and the synthesis conditions are relatively mild, and it has the potential for large-scale production.

[0025] (2) The composite solubilizer prepared by the Gemini quaternary ammonium salt cationic surfactant of the present invention has the functions of solubilization, anti-oxidation and antibacterial. It has excellent solubilization effect, good formulation compatibility and long-term storage stability, and can overcome the shortcomings of the traditional anionic and cationic surfactant compound solubilizers, which have unsatisfactory solubilization effect or poor formulation stability.

[0026] (3) The water-based fragrance release liquid prepared by the Gemini quaternary ammonium salt cationic surfactant of the present invention uses water as a solvent, and the solution has high transparency, good stability and no flammability risk. Attached Figure Description

[0027] Figure 1 The Gemini quaternary ammonium salt cationic surfactants prepared in Examples 1-4.

[0028] Figure 2 To compare the solubilizing effect of the composite solubilizers in Examples 5-8 with the traditional "quaternary ammonium salt cationic surfactant + anionic surfactant" compound solubilizers.

[0029] Figure 3 To compare the solubilizing effect of the composite solubilizers in Examples 11-14 with those of traditional composite solubilizers or anionic surfactants as solubilizers.

[0030] Figure 4 The results show the stability test results of the water-based fragrance release liquid prepared using the composite solubilizers in Examples 5 and 7. Detailed Implementation

[0031] The specific embodiments of the present invention will be further described below. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods, and the experimental materials used in the following embodiments are all available through conventional commercial channels.

[0033] Example 1: Preparation of Gemini quaternary ammonium salt cationic surfactant 1 0.05 mol of 1,6-dibromohexane and 30 mL of acetonitrile were added to a three-necked flask equipped with a reflux evaporator. (The purpose of reflux is to allow the acetonitrile to condense and return to the flask, as the reaction temperature is 60°C and the boiling point of acetonitrile is around 81°C.) The mixture was slowly heated to 60°C in an oil bath and stirred at this temperature for 10 min. Then, 0.11 mol of N,N-dimethylbutylamine in acetonitrile solution (solvent volume 30 mL) was added dropwise through a constant pressure dropping funnel over a period of 30 min. The mixture was then stirred at 400 rpm for 2 h to carry out the quaternization reaction. After the reaction was complete, the product solution was subjected to rotary evaporation under reduced pressure at 65°C to remove the organic solvent. The product was then washed three times with anhydrous ethanol, followed by rotary evaporation under reduced pressure. Finally, the product was transferred to an oven and dried at 60°C for 72 h to remove residual raw materials, yielding a white solid product. Figure 1), namely 1,6-bis(bromo(butyl)dimethyl-λ5-azanonyl)hexane, whose structure is shown below: .

[0034] Example 2: Preparation of Gemini quaternary ammonium salt cationic surfactant 2 0.05 mol of 1,8-dibromooctane and 50 mL of acetonitrile were added to a three-necked flask equipped with a reflux reflux apparatus. The mixture was slowly heated to 60 °C in an oil bath and stirred at this temperature for 10 min. Then, a solution of 0.10 mol of N,N-dimethylbutylamine in acetonitrile (solvent volume 30 mL) was added dropwise through a constant pressure dropping funnel over a period of 30 min. The mixture was then stirred at 500 rpm for 2 h to carry out the quaternization reaction. After the reaction was complete, the product solution was subjected to rotary evaporation under reduced pressure at 60 °C to remove the organic solvent. The product was then washed three times with anhydrous ethanol, followed by another rotary evaporation under reduced pressure. Finally, the product was transferred to an oven and dried at 60 °C for 72 h to remove residual raw materials, yielding a white solid product. Figure 1 ), namely 1,8-bis(bromo(butyl)dimethyl-λ5-azanonyl)octane, whose structure is shown below: .

[0035] Example 3: Preparation of Gemini quaternary ammonium salt cationic surfactant 3 0.05 mol of 1,6-dibromohexane and 30 mL of acetonitrile were added to a three-necked flask equipped with a reflux reflux apparatus. The mixture was slowly heated to 50 °C in an oil bath and stirred at this temperature for 15 min. Then, a solution of 0.12 mol of N,N-dimethylethylamine in acetonitrile (solvent volume 30 mL) was added dropwise through a constant pressure dropping funnel over a period of 20 min. The mixture was then stirred at 600 rpm for 1.5 h to carry out the quaternization reaction. After the reaction was complete, the product solution was subjected to rotary evaporation under reduced pressure at 55 °C to remove the organic solvent. The product was then washed five times with anhydrous ethanol, followed by another rotary evaporation under reduced pressure. Finally, the product was transferred to an oven and dried at 50 °C for 72 h to remove residual raw materials, yielding a white solid product. Figure 1 ), namely 1,6-bis(bromo(ethyl)dimethyl-λ5-azanonyl)hexane, whose structure is shown below: .

[0036] Example 4: Preparation of Gemini quaternary ammonium salt cationic surfactant 4 0.05 mol of 1,8-dibromooctane and 50 mL of acetonitrile were added to a three-necked flask equipped with a reflux reflux apparatus. The mixture was slowly heated to 55 °C in an oil bath and stirred at this temperature for 10 min. Then, a solution of 0.12 mol of N,N-dimethylethylamine in acetonitrile (solvent volume 30 mL) was added dropwise through a constant pressure dropping funnel over a period of 30 min. The mixture was then stirred at 600 rpm for 2 h to carry out the quaternization reaction. After the reaction was complete, the product solution was subjected to rotary evaporation under reduced pressure at 55 °C to remove the organic solvent. The product was then washed three times with anhydrous ethanol, followed by another rotary evaporation under reduced pressure. Finally, the product was transferred to an oven and dried at 50 °C for 48 h to remove residual raw materials, yielding a white solid product. Figure 1 ), namely 1,8-bis(bromo(ethyl)dimethyl-λ5-azanonyl)octane, whose structure is shown below: .

[0037] Examples 5-8: Preparation of Composite Solubilizers According to the weight proportions in Table 1, accurately weigh the Gemini quaternary ammonium salt cationic surfactants 1-4 and the anionic surfactant sodium dodecylbenzenesulfonate prepared in Examples 1-4, and obtain the composite solubilizer after the raw materials are thoroughly mixed.

[0038] Table 1 Formulation of the composite solubilizers in Examples 5-8 Note: The numbers in Table 1 are parts by mass (Examples 5-8 are illustrated in g).

[0039] Example 9: Preparation of Water-Based Slow-Release Aromatherapy Liquid This embodiment provides a water-based slow-release aromatherapy liquid. Based on the total mass, the formulation of the water-based slow-release aromatherapy liquid is as follows: 2% aroma-releasing component, 1.6% compound solubilizer, 4% anhydrous ethanol, and the balance is water (to bring the total to 100%).

[0040] The fragrance-releasing component is osmanthus fragrance, and the composite solubilizer is the solubilizer in Example 7.

[0041] The preparation method of the water-based slow-release aromatherapy liquid is as follows: after mixing rose fragrance, compound solubilizer and anhydrous ethanol evenly, add water for 1 / 5 of the total water volume, continue stirring until there are no obvious solubilizer particles in the solution, the solution is clear and there is no significant turbidity, and finally add the remaining water to obtain the target system.

[0042] Example 10: Preparation of water-based slow-release aromatherapy liquid This embodiment provides a water-based slow-release aromatherapy liquid. Based on total mass, the formulation of the water-based slow-release aromatherapy liquid is as follows: 2% fragrance-releasing component, 1.7% compound solubilizer, 4% anhydrous ethanol, and the balance being water (to bring the total to 100%). The fragrance-releasing component is osmanthus fragrance, and the composite solubilizer is the solubilizer in Example 5.

[0043] The preparation method of the water-based slow-release aromatherapy liquid is as follows: After mixing rose fragrance, compound solubilizer and anhydrous ethanol evenly, add water for 1 / 5 of the total water volume, continue stirring until there are no obvious solubilizer particles in the solution, the solution is clear and there is no significant turbidity, and finally add the remaining water to obtain the target system.

[0044] Examples 11-14: Preparation of Composite Solubilizers According to the weight proportions in Table 2, accurately weigh the Gemini quaternary ammonium salt cationic surfactants 1-4 and the anionic surfactant sodium dodecyl sulfate prepared in Examples 1-4, and obtain the composite solubilizer after the raw materials are thoroughly mixed.

[0045] Table 2 Formulation table of composite solubilizers in Examples 11-14 Note: The numbers in Table 2 are parts by mass (Examples 11-14 are illustrated in g).

[0046] Comparative Example 1: This comparative example uses a commercially available solubilizer: a composite solubilizer is prepared by compounding a conventional ionic surfactant, hexadecyltrimethylammonium bromide, with sodium dodecylbenzenesulfonate. The mass ratio of hexadecyltrimethylammonium bromide to sodium dodecylbenzenesulfonate is 1:1.2.

[0047] Comparative Example 2: This comparative example uses sodium dodecyl sulfate, a common anionic surfactant, as a solubilizer.

[0048] Comparative Example 3: This comparative example uses a conventional ionic surfactant, dodecyl dimethyl benzyl ammonium chloride, to prepare a composite solubilizer by compounding with sodium dodecyl sulfate. The mass ratio of dodecyl dimethyl benzyl ammonium chloride to sodium dodecyl sulfate is 1:7.

[0049] Experimental example: The following experiments demonstrate the solubilizing effect of the composite solubilizer obtained by combining Gemini quaternary ammonium salt cationic surfactant and anionic surfactant, as well as the stability of the water-based fragrance release liquid.

[0050] (1) The solubilizing effect of the composite solubilizers in Examples 5-8 and 11-14, as well as the solubilizers in Comparative Examples 1-3, was tested: the amounts of the fragrance-releasing component (osmanthus fragrance or rose fragrance), anhydrous ethanol, and water were controlled as fixed quantities, while the amount of solubilizer was controlled as a variable. The solubilizer was gradually added until the solution was completely clear and transparent. Specifically, by mass, the fragrance-releasing component was 0.2 g, anhydrous ethanol was 0.4 g, water was 9 g, and the amount of composite solubilizer was a variable. The solubilizing effect was evaluated by comparing the amount of solubilizer used when the water-based aromatherapy solution was just clear and transparent; the less solubilizer used, the better the solubilizing effect. The test results are shown in […]. Figure 2 , Figure 3 The numbers in the figure represent the actual amount of the composite solubilizer used, in grams.

[0051] like Figure 2 As shown, compared with Comparative Example 1, the composite solubilizers prepared in this invention (Examples 5-8) exhibit superior solubilizing effects. In particular, the solubilizing effects of Examples 7 and 8 are significantly better than those of commercially available solubilizers (Comparative Example 1), with a significant reduction in solubilizer usage of approximately 30%. This is attributed to the bisquaternary ammonium salt groups in the cationic surfactants. During compounding, the two quaternary ammonium salt groups interact electrostatically with the anionic surfactants, resulting in a more compact arrangement of surfactant molecules, which enhances the surface activity of the composite solubilizer and improves its solubilizing effect.

[0052] like Figure 3 As shown, compared with Comparative Examples 2 and 3, the composite solubilizers prepared in this invention (Examples 11-14) exhibit significantly better solubilizing effects. When using the anionic surfactant sodium dodecyl sulfate alone, or a composite solubilizer formulated with it and the traditional cationic surfactant dodecyl dimethyl benzyl ammonium chloride, as a solubilizer for water-based fragrance liquids, the solubilizing effect is limited. However, when the Gemini quaternary ammonium salt of this invention is used in combination with anionic surfactants, an excellent synergistic solubilizing effect is achieved. In contrast, the amount of solubilizer used in water-based fragrance liquids in Examples 11-14 is significantly reduced, with the overall solubilizer usage reduced to 25%, demonstrating a significant synergistic solubilizing effect.

[0053] (2) Stability Test: The stability of the water-based slow-release fragrance liquids in Examples 9 (No. ①) and 10 (No. ②) was tested at low temperature (5 ℃) and high temperature (45 ℃), respectively. Specifically, the solution state changes of these two water-based slow-release fragrance liquids after 24 hours of storage at high and low temperatures were tested. If the clear and transparent water-based slow-release fragrance liquid at room temperature turns white and cloudy or exhibits oil-water separation at high and low temperatures, it indicates that the solubilizer is greatly affected by temperature, limiting the actual application scenarios of the product. The stability test results are shown in […]. Figure 4 .

[0054] like Figure 4As shown, the water-based slow-release aromatherapy liquids prepared using the solubilizers in Examples 5 and 7 maintained good stability at both high temperature (45°C) and low temperature (5°C), and the solutions remained clear and transparent without any oil-water separation.

[0055] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A Gemini quaternary ammonium salt cationic surfactant, characterized in that, The Gemini quaternary ammonium salt cationic surfactant has the structure shown in Formula 1: ； In the formula, R1 is a C2-C8 alkyl group and R2 is a C2-C4 alkyl group.

2. The Gemini quaternary ammonium salt cationic surfactant according to claim 1, characterized in that, The Gemini quaternary ammonium cationic surfactant is selected from at least one of the following compounds: 。 3. The method for preparing the Gemini quaternary ammonium salt cationic surfactant according to claim 1, characterized in that, Includes the following steps: In a container equipped with a reflux reflux device, raw material A (as shown in Formula 2) is dissolved in acetonitrile and preheated to 50-70°C; simultaneously, raw material B (as shown in Formula 3) is dissolved in acetonitrile and then added to the container to undergo a quaternization reaction with raw material A; after the reaction is complete, the product solution is purified to obtain a white solid product, which is the Gemini quaternary ammonium salt cationic surfactant. ； In the formula, R1 is a C2-C8 alkyl group and R2 is a C2-C4 alkyl group.

4. The method for preparing the Gemini quaternary ammonium salt cationic surfactant according to claim 3, characterized in that, The molar ratio of raw material A to raw material B is 1:2-2.

2.

5. A composite solubilizer, characterized in that, The composite solubilizer includes the Gemini quaternary ammonium salt cationic surfactant and the anionic surfactant as described in claim 1 or 2.

6. The composite solubilizer according to claim 5, characterized in that, The anionic surfactants include sulfonates, sulfates, carboxylates, or phosphate salts.

7. A composite solubilizer according to claim 5, characterized in that, In composite solubilizers, based on the total weight of the composite solubilizer, the weight percentages of each component are as follows: Anionic surfactants: 20%-80%; Cationic surfactants: 20%-80%.

8. A water-based slow-release aromatherapy liquid, characterized in that, The water-based slow-release aromatherapy liquid comprises the composite solubilizer, aroma-releasing component, ethanol, and water as described in any one of claims 5-7; Based on the total weight of the aromatherapy liquid, the weight percentages of each component are as follows: compound solubilizer 1-20%, fragrance-releasing component 1-10%, ethanol 0-15%, and water to make up to 100%.

9. The water-based slow-release aromatherapy liquid according to claim 8, characterized in that, The fragrance-releasing component is a fragrance or essential oil.

10. The method for preparing the water-based slow-release aromatherapy liquid according to claim 8 or 9, characterized in that, Includes the following steps: After mixing the compound solubilizer, aroma-releasing component and ethanol, add 1 / 5 to 1 / 3 of the total water volume and continue stirring until there are no obvious solubilizer particles in the solution, the solution is clear and there is no significant turbidity. Finally, add the remaining water to obtain the target system.

Images