Plant composition with soothing and repairing effects as well as preparation method and application thereof

Abstract

The invention provides a plant composition with soothing and repairing effects as well as a preparation method and application thereof. The plant composition is prepared from the following components in percentage by mass: 0.1 to 2 percent of radix gentianae extract, 0.1 to 1 percent of alpine astragalus flower / leaf / stem extract, 0.1 to 5 percent of summer mentha haplocalyx extract, 1 to 10 percent of paeonia lactiflora root extract, 1 to 10 percent of oat extract, 0.1 to 1 percent of 1, 2-hexanediol, 0.1 to 1 percent of p-hydroxyacetophenone, 10 to 50 percent of butanediol and the balance of water. Through cooperation of all the components, the effects of immediate relieving, anti-inflammation and red fading and long-acting barrier repairing can be achieved in a multi-target mode. Human body efficacy tests prove that the composition can significantly increase the moisture content of skin cuticle, reduce the transpedermis water loss rate, reduce skin heme and facial red regions and effectively improve skin sensitivity, redness, dryness and other problems, and human body patch tests show that the composition is high in safety and free of irritation.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to a plant composition with soothing and repairing effects, its preparation method, and its application. Background Technology

[0002] Skin sensitivity, redness, and dryness are extremely common in daily life. With increasing environmental pollution, a faster pace of life, and greater attention to skincare, these skin problems are becoming increasingly prominent. Skin sensitivity not only manifests as reduced tolerance to external stimuli, leading to discomfort such as redness, itching, and stinging, but also affects the skin's appearance, causing redness, dryness, and flaking, significantly impacting quality of life and self-confidence. For example, during seasonal changes, drastic fluctuations in temperature and humidity can make many people's skin sensitive and fragile, resulting in redness, dryness, and peeling, severely affecting daily work and social interactions. Therefore, addressing these skin problems is urgent and has become a pressing challenge for the skincare industry. Summary of the Invention

[0003] This invention aims to address the problems of existing soothing and repairing cosmetics, such as poor immediate soothing effect, limited anti-inflammatory and redness-reducing ability, and inability to achieve long-term barrier repair. By carefully selecting and formulating a variety of plant extracts and other effective ingredients, it achieves multi-target action, providing the skin with comprehensive care that includes immediate soothing, anti-inflammatory and redness-reducing, and long-term barrier repair. It effectively improves skin sensitivity, redness, dryness, and other problems, meeting consumers' demand for highly effective and safe skincare products.

[0004] A plant composition with soothing and repairing effects, comprising the following components in weight percentages: 0.1-2% gentian root extract, 0.1-1% astragalus flower / leaf / stem extract, 0.1-5% peppermint extract, 1-10% peony root extract, 1-10% oat extract, 0.1-1% 1,2-hexanediol, 0.1-1% p-hydroxyacetophenone, 10-50% butylene glycol, and the balance being water.

[0005] Beneficial effects In this invention, gentian root extract is rich in active substances such as gentiopicroside and gentiopicrin, which have a powerful soothing effect on sensitive skin and can effectively relieve redness and discomfort caused by external stimuli. Astragalus flower / leaf / stem extract contains various bioactive components that can enhance the skin's self-repair ability and assist other ingredients in exerting anti-inflammatory effects. Peppermint extract has cooling and soothing properties, instantly relieving the burning sensation of the skin, while its antioxidant components help reduce inflammatory responses. Paeonia root extract is rich in paeoniflorin and other components, possessing excellent anti-inflammatory and antioxidant effects, effectively reducing the release of inflammatory factors in the skin and improving skin redness. Oat extract contains various nutrients such as oat β-glucan, which not only provides long-lasting moisturizing but also promotes skin cell metabolism, enhances skin barrier function, and achieves long-lasting barrier repair. 1,2-Hexanediol and p-hydroxyacetophenone, as safe preservatives, ensure the stability of the composition while having low skin irritation. Butylene glycol acts as a good moisturizer and solvent, helping to dissolve and penetrate other ingredients. Detailed Implementation

[0006] The market currently offers a wide variety of soothing and repairing cosmetics, but they generally suffer from some drawbacks. Many products do not provide immediate soothing effects, often requiring prolonged use to see noticeable results. When skin experiences sudden sensitivity, they fail to effectively alleviate discomfort in a timely manner. For example, some products do not quickly reduce stinging and redness after use.

[0007] Some products have limited anti-inflammatory and redness-reducing abilities, only able to alleviate mild inflammatory reactions, and are unlikely to achieve ideal improvement for more severe skin redness. While some products contain anti-inflammatory ingredients, due to unreasonable formulations or insufficient ingredient concentrations, they cannot fundamentally inhibit the release of inflammatory factors, leading to persistent skin redness.

[0008] Some products fail to provide long-lasting barrier repair. The skin barrier is a crucial protective structure; damage to it leads to increased moisture loss and decreased resistance to external stimuli. However, many existing soothing and repairing cosmetics only improve skin hydration in the short term, failing to fundamentally repair a damaged skin barrier, making skin problems prone to recurrence. For example, some products may provide temporary relief from dryness, but over time, the skin returns to a dry and dehydrated state.

[0009] Based on this, one embodiment of the present invention provides a plant composition with soothing and repairing effects, comprising the following components in the indicated weight percentages: 0.1-2% gentian root extract, 0.1-1% astragalus flower / leaf / stem extract, 0.1-5% peppermint extract, 1-10% peony root extract, 1-10% oat extract, 0.1-1% 1,2-hexanediol, 0.1-1% p-hydroxyacetophenone, 10-50% butylene glycol, and the balance being water.

[0010] Achieving synergistic effects across multiple targets is the key challenge of this invention. Skin sensitivity, redness, and dryness involve multiple physiological processes and signaling pathways. To achieve a synergistic effect of immediate soothing, anti-inflammatory and redness-reducing properties, and long-lasting barrier repair, precise ingredient selection and optimized formulation are necessary. Different ingredients may interact, and inappropriate combinations can lead to weakened efficacy or even negative effects. For example, some plant extracts may have soothing or anti-inflammatory effects when used alone, but when mixed together, they may undergo chemical reactions, reducing their individual activity. This invention, through repeated experiments, screened a large number of plant extracts and other ingredients to select gentian root extract, astragalus flower / leaf / stem extract, peppermint extract, peony root extract, and oat extract, and finely optimized their mass percentage ranges. Through a unique formulation design, each ingredient can act on different targets, synergistically improving skin problems comprehensively. For example, the soothing effect of gentian root extract combined with the anti-inflammatory effect of peony root extract can quickly relieve skin sensitivity and redness; the long-lasting moisturizing and barrier repair effects of oat extract work synergistically with other ingredients to achieve lasting repair of the skin barrier, thus successfully overcoming technical difficulties and providing consumers with an efficient soothing and repairing solution.

[0011] Gentian root extract is rich in active substances such as gentiocarbazone and gentiopicrin, possessing powerful soothing properties that effectively relieve redness and discomfort caused by external stimuli. Astragalus flower / leaf / stem extract contains various bioactive components that enhance the skin's self-repair ability and assist other ingredients in exerting anti-inflammatory effects. Peppermint extract has cooling and soothing properties, instantly relieving burning sensations, while its antioxidant components help reduce inflammatory responses. Paeonia root extract is rich in paeoniflorin and other components, exhibiting excellent anti-inflammatory and antioxidant effects, effectively reducing the release of inflammatory factors and improving skin redness. Oat extract contains various nutrients such as oat beta-glucan, providing long-lasting hydration, promoting skin cell metabolism, enhancing skin barrier function, and achieving long-lasting barrier repair. 1,2-Hexanediol and p-hydroxyacetophenone serve as safe preservatives, ensuring the stability of the composition while minimizing skin irritation. Butylene glycol acts as a good moisturizer and solvent, aiding in the dissolution and penetration of other ingredients.

[0012] Understandably, the extract of Astragalus alpine flowers / leaves / stems is a mixture extracted from the flowers, leaves, and stems of the legume Astragalus alpineus L.

[0013] In some embodiments, the mass ratio of gentian root extract, alpine astragalus flower / leaf / stem extract and peppermint extract is 1:(0.2-0.6):(2-3).

[0014] In some embodiments, the preparation method of gentian root extract is as follows: Raw material pretreatment: Take dried gentian root, pulverize it to 20-40 mesh, and soak it in a 5% (w / w) β-cyclodextrin aqueous solution for 30 minutes. The mass ratio of β-cyclodextrin to gentian root is 1:10. This forms an inclusion preprotection system to prevent the oxidation of gentiopicroside.

[0015] Extraction with a compound solvent: Add the extraction solvent at a material-to-liquid ratio of 1g:25mL. The extraction solvent is a mixture of ethanol, water, and glycerol with a volume ratio of 40:55:5. The solvent system can dissolve both fat-soluble and water-soluble active ingredients simultaneously, and glycerol can enhance the stability of the active ingredients.

[0016] Ultrasonic-microwave synergistic extraction: Extraction was performed at 35℃ under nitrogen protection, with a microwave power of 180W and an ultrasonic power of 80W for 40 minutes. Rapid heating via microwaves broke down cell walls, while ultrasound enhanced mass transfer, thus increasing the extraction rate of gentiopicrin.

[0017] Gradient purification: The extract was centrifuged at 4000 r / min for 15 min, and the supernatant was passed through an AB-8 macroporous resin column at a flow rate of 2 BV / h. First, impurities were eluted with a 30% (v / v) ethanol aqueous solution, and then eluted with a 70% (v / v) ethanol aqueous solution. The eluent was collected. Low-temperature concentration and drying: The eluent was concentrated under reduced pressure at 45°C and -0.08 MPa to a solid content of 20%, and then freeze-dried at -40°C and 10 Pa to obtain gentian root extract.

[0018] In some embodiments, the purity of gentiopicrin in the gentian root extract obtained by the above method is ≥18%.

[0019] In some embodiments, the preparation method of the extract of Astragalus membranaceus flower / leaf / stem is as follows: Raw material pretreatment: Take fresh alpine astragalus flowers / leaves / stems, wash them, quickly freeze them at -20℃ for 3 hours, and then grind them to 60 mesh to obtain powder. This method can preserve the active ingredients of the fresh sample and avoid the degradation of flavonoids caused by sun drying.

[0020] Synergistic enzymatic hydrolysis and extraction: Add acetate-sodium acetate buffer (pH 5.5) at a material-to-liquid ratio of 1g:30mL, along with 0.3% cellulase and 0.2% pectinase (by weight of the powder). Hydrolyze at 45℃ for 60 minutes to obtain the enzymatic hydrolysate. This process disrupts the plant cell wall structure and promotes the release of active ingredients.

[0021] Dynamic countercurrent extraction: Propylene glycol (10% by volume of the enzymatic hydrolysate) was added to the hydrolysate, and dynamic countercurrent extraction was performed three times at 50℃ and 150 rpm for 30 min each time to obtain the extract. During this process, propylene glycol enhances the solubility and stability of astragaloside A.

[0022] Membrane separation and purification: The extract is filtered through a ceramic membrane with a pore size of 0.1 μm to remove impurities, and then concentrated through a nanofiltration membrane with a molecular weight cutoff of 1000 Da to remove small molecule impurities, thus obtaining a concentrated solution.

[0023] Spray drying: 0.5% maltodextrin by mass of the concentrate is added to the concentrate as a carrier, and spray drying is carried out at an inlet air temperature of 120°C and an outlet air temperature of 60°C to obtain a powdered extract.

[0024] In some embodiments, the extracts of Astragalus membranaceus flowers / leaves / stems obtained by the above methods contain flavonoids ≥25% and astragaloside A ≥3.8%.

[0025] In some embodiments, the preparation method of peppermint extract is as follows: Raw material pretreatment: Take fresh summer peppermint leaves, wash and drain them, cut them into 1cm pieces, and soak them in a 0.1% ascorbic acid aqueous solution for 10 minutes. This method can inhibit the oxidation of rosmarinic acid.

[0026] Subcritical CO2 extraction-ethanol desorption: The raw material was loaded into the extraction vessel, and ethanol at a mass percentage of 5% of the raw material was added as an entrainer. Extraction was carried out for 90 min at an extraction pressure of 15 MPa, a temperature of 35 °C, and a CO2 flow rate of 20 L / h. After extraction, desorption was carried out in the desorption vessel under reduced pressure at a pressure of 5 MPa and a temperature of 45 °C to obtain the crude extract.

[0027] Molecular distillation purification: The crude extract is separated by molecular distillation to remove high-boiling-point impurities. The distillation temperature is 80℃ and the vacuum degree is 5Pa. In some examples, this increases the purity of menthol to ≥30%.

[0028] Aqueous dispersion: The purified crude extract was mixed with 1,2-propanediol at a mass ratio of 1:4, and Tween-80 at 0.3% of the crude extract mass was added. The mixture was stirred at 1000 r / min for 30 min to obtain peppermint extract. This forms a stable aqueous dispersion system, which facilitates subsequent composition formulation.

[0029] In some embodiments, the preparation method of peony root extract is as follows: Raw material pretreatment: Take dried peony root, pulverize it to 30 mesh, soak it in 80℃ hot water for 20 minutes, filter it, and obtain solid raw material. This removes surface starchy impurities and reduces interference in subsequent extraction.

[0030] Semi-bionic extraction: Two simulated body fluids were added sequentially at a material-to-liquid ratio of 1g:28mL. First stage: Add hydrochloric acid aqueous solution with pH 2 (which can simulate gastric juice), stir and extract at 37℃ for 40 minutes; The second stage involves adjusting the pH to 7.4 (to simulate intestinal fluid), adding sodium bile acid at 0.1% of the raw material's mass, and extracting at 40°C with stirring for 60 minutes to obtain the extract. This effectively promotes the dissolution and absorption of paeoniflorin.

[0031] Flocculation purification: Cool the extract to room temperature, add 0.2% (by mass) of chitosan, stir well and let stand for 2 hours. Flocculation can remove impurities such as proteins and tannins. Filter the supernatant through a 300-mesh filter cloth to obtain the filtrate.

[0032] Concentration and drying: The filtrate was concentrated under reduced pressure at 50°C and -0.09 MPa to a thick paste, and then freeze-dried at -35°C and 15 Pa to obtain peony root extract.

[0033] In some embodiments, the paeoniflorin content in the peony root extract obtained by the above method is ≥22%.

[0034] In some embodiments, the oat extract is prepared as follows: Raw material pretreatment: Take defatted oat flour, pass it through an 80-mesh sieve, soak it in a 5% (v / v) ethanol aqueous solution for 20 minutes to remove fat-soluble impurities, and filter to obtain solid raw material.

[0035] Dual-enzyme synergistic extraction: Add sodium dihydrogen phosphate-disodium hydrogen phosphate buffer at pH 6 at a material-to-liquid ratio of 1g:35mL, add α-amylase at 0.4% of the solid raw material mass, and enzymatically hydrolyze at 70℃ for 30min (degrading starch); cool to 50℃, add alkaline protease at 0.3% of the solid raw material mass, and enzymatically hydrolyze for 90min to obtain the enzymatic hydrolysate; hydrolyze oat protein to generate small molecule peptides.

[0036] Ultrasonic-assisted extraction: Add 15% glycerol (by mass) to the enzymatic hydrolysate and extract for 50 min at 45℃ and 100W ultrasonic power to obtain the extract. This promotes the dissolution of β-glucan, and glycerol can protect β-glucan from degradation.

[0037] Membrane separation and fractionation: The extract was centrifuged at 5000 r / min for 20 min, and the supernatant was passed through an ultrafiltration membrane with a molecular weight cutoff of 5000 Da. The permeate (containing oat peptides) and the retentate (containing β-glucan) were collected and combined, then concentrated through a nanofiltration membrane to a solid content of 15% to obtain the concentrate.

[0038] Low-temperature drying: The concentrate was vacuum dried at 40°C and a vacuum degree of -0.08 MPa to obtain oat extract.

[0039] In some embodiments, the oat extract obtained by the above method contains ≥18% β-glucan and ≥12% oat polypeptide.

[0040] Another embodiment of the present invention provides a method for preparing the above-mentioned plant composition with soothing and repairing effects, comprising the following steps: (1) Mix butanediol with water and stir for 8-12 minutes at 45-55℃ and 300-350 r / min to obtain a mixed solvent; (2) Add 1,2-hexanediol and p-hydroxyacetophenone to the mixed solvent, and heat to 58-62℃ and keep warm for 4-6 min; (3) Cool down to 38-42℃, add gentian root extract, alpine astragalus flower / leaf / stem extract and summer peppermint extract in sequence, and stir at 400-450r / min for 18-22min; (4) Continue to cool down to 33-37℃, add peony root extract and oat extract, and stir at 200-250 r / min for 13-17 min; (5) After filtration through a 300-400 mesh filter cloth, the mixture is allowed to stand and cool to room temperature to obtain the composition.

[0041] In some embodiments, in step (3), the three extracts are added at intervals of 3-5 minutes, and nitrogen is used for protection during stirring to prevent the plant extracts from oxidizing and becoming inactive.

[0042] Another embodiment of the present invention provides a cosmetic product comprising the above-mentioned plant composition with soothing and repairing effects.

[0043] In some embodiments, the plant composition accounts for 5-30% of the cosmetic by mass.

[0044] Optionally, the cosmetic product may be a serum, lotion, cream, or mask.

[0045] The following are examples and comparative examples.

[0046] Example 1 The preparation method of the composition in this embodiment is as follows: (1) Mix butanediol with water and stir for 10 min at 50°C and 300 r / min to obtain a mixed solvent; (2) Add 1,2-hexanediol and p-hydroxyacetophenone to the mixed solvent, and heat to 60°C and keep warm for 5 min; (3) Cool down to 40°C, and add gentian root extract, alpine astragalus flower / leaf / stem extract and summer peppermint extract in sequence. The three extracts are added at intervals of 4 min, and stirred at 400 r / min for 20 min. (4) Continue cooling to 35°C, add peony root extract and oat extract, and stir at 200 r / min for 15 min; (5) After filtering through a 300-mesh filter cloth and cooling to room temperature, the composition is obtained.

[0047] The preparation methods for gentian root extract, alpine astragalus flower / leaf / stem extract, peppermint extract, peony root extract, and oat extract shall be carried out in accordance with the contents recorded above, and will not be repeated here.

[0048] The other embodiments and comparative examples differ from Example 1 in that the components of the compositions are different, as shown in Table 1. The content of each component in the table represents the mass percentage of that component in the composition.

[0049] Table 1

[0050] Test case (1) Moisture content of the stratum corneum: A skin moisture meter is used, which utilizes the principle of capacitance. By applying a weak electric field to the skin surface and measuring the change in the skin's impedance to the electric field, the moisture content of the stratum corneum can be calculated. Before the test, ensure that the subject's face is clean and free of makeup residue. The probe of the meter is gently pressed vertically onto different areas of the subject's face, such as the forehead, cheeks, and chin. Each area is measured three times, and the average value is taken as the moisture content data for that area.

[0051] (2) Transepidermal water loss rate: The transepidermal water loss rate (TEBFR) meter is used to calculate the transepidermal water loss rate by measuring the rate of water evaporation from the skin surface, based on the principle of water evaporation. During the test, the probe of the instrument is placed on the test area of ​​the subject's clean face and kept stable. After the instrument reading stabilizes, the data is recorded. Each area is measured three times, and the average value is taken.

[0052] (3) Skin hemoglobin: Using a skin hemoglobin analyzer, the skin's hemoglobin content is accurately measured by detecting the absorption and reflection of light at specific wavelengths. Before the test, the subject needs to rest for 20 minutes in a quiet environment with suitable temperature and humidity to stabilize their skin condition. The analyzer's probe is placed firmly against the subject's facial test area, and measurements are taken three times for each area, with the average value recorded.

[0053] (4) Facial red area: A skin detection system is used to capture high-quality facial images. Professional image analysis software is then used to precisely analyze the facial red areas in the images, calculating the area and degree of redness. Subjects sit in front of the detection system, adjusting their posture and facial expressions as instructed, and facial images are captured. The software's analysis function then yields data on the facial red areas.

[0054] (5) Safety: Closed patch test: 30 participants, skin reaction observed after 48 hours of application, rated according to the "Cosmetic Safety Technical Specifications" (level 0-4). The test results are shown in Table 2.

[0055] In Table 2, the data before use represents the test data before using the compositions of the examples and comparative examples, i.e., blank control data.

[0056] Table 2

[0057] The security test results are shown in Table 3.

[0058] Table 3

[0059] The results above show that the plant composition of the present invention can significantly increase the moisture content of the stratum corneum, reduce transepidermal water loss, reduce skin hemoglobin and facial redness, effectively improve skin sensitivity, redness, dryness and other problems, and has higher safety.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0061] For those skilled in the art, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A plant-based composition with soothing and repairing effects, characterized in that, The product consists of the following components in the indicated mass percentages: 0.1-2% gentian root extract, 0.1-1% astragalus flower / leaf / stem extract, 0.1-5% peppermint extract, 1-10% peony root extract, 1-10% oat extract, 0.1-1% 1,2-hexanediol, 0.1-1% p-hydroxyacetophenone, 10-50% butylene glycol, and the balance being water.

2. The plant composition with soothing and repairing effects as described in claim 1, characterized in that, The mass ratio of the gentian root extract, the alpine astragalus flower / leaf / stem extract and the peppermint extract is 1:(0.2-0.6):(2-3).

3. The plant composition with soothing and repairing effects as described in claim 1 or 2, characterized in that, The preparation method of gentian root extract is as follows: Raw material pretreatment: Take dried gentian root, crush it to 20-40 mesh, soak it in 5% β-cyclodextrin aqueous solution for 30 min, the mass ratio of β-cyclodextrin to gentian root is 1:10; Compound solvent extraction: Add extraction solvent at a material-to-liquid ratio of 1g:25mL. The extraction solvent is a mixture of ethanol, water and glycerol with a volume ratio of 40:55:

5. Ultrasonic-microwave synergistic extraction: Extraction was carried out at 35℃, under nitrogen protection, with microwave power of 180W and ultrasonic power of 80W for 40 minutes. Gradient purification: The extract was centrifuged at 4000 r / min for 15 min, and the supernatant was passed through an AB-8 macroporous resin column at a flow rate of 2 BV / h. First, impurities were eluted with a 30% (v / v) ethanol aqueous solution, and then eluted with a 70% (v / v) ethanol aqueous solution. The eluent was collected. Low-temperature concentration and drying: The eluent was concentrated under reduced pressure at 45°C and -0.08 MPa to a solid content of 20%, and then freeze-dried at -40°C and 10 Pa to obtain gentian root extract.

4. The plant composition with soothing and repairing effects as described in claim 1 or 2, characterized in that, The preparation method of extracts from the flowers, leaves, and stems of Astragalus membranaceus in alpine regions is as follows: Raw material pretreatment: Take fresh alpine Astragalus flowers / leaves / stems, wash them, freeze them quickly at -20℃ for 3 hours, and grind them to 60 mesh to obtain powder; Synergistic enzymatic hydrolysis-extraction: Add acetate-sodium acetate buffer solution at pH 5.5 at a material-to-liquid ratio of 1g:30mL, add cellulase at 0.3% of powder mass and pectinase at 0.2% of powder mass, and enzymatically hydrolyze at 45℃ for 60min to obtain enzymatic hydrolysate; Dynamic countercurrent extraction: 10% propylene glycol (by volume of the enzymatic hydrolysate) was added to the enzymatic hydrolysate, and dynamic countercurrent extraction was performed three times at 50℃ and 150 r / min for 30 min each time to obtain the extract. Membrane separation and purification: The extract is filtered through a ceramic membrane with a pore size of 0.1 μm to remove impurities, and then concentrated through a nanofiltration membrane with a molecular weight cutoff of 1000 Da to remove small molecule impurities, thus obtaining a concentrated solution; Spray drying: 0.5% maltodextrin by mass of the concentrate is added to the concentrate as a carrier, and spray drying is carried out at an inlet air temperature of 120°C and an outlet air temperature of 60°C to obtain a powdered extract.

5. The plant composition with soothing and repairing effects as described in claim 1 or 2, characterized in that, The preparation method of peppermint extract is as follows: Raw material pretreatment: Take fresh summer mint leaves, wash and drain them, cut them into 1cm pieces, and soak them in a 0.1% ascorbic acid aqueous solution for 10 minutes; Subcritical CO2 extraction-ethanol desorption: The raw material was loaded into the extraction vessel, and ethanol at a mass percentage of 5% of the raw material was added as an entrainer. Extraction was carried out for 90 min at an extraction pressure of 15 MPa, a temperature of 35 °C, and a CO2 flow rate of 20 L / h. After extraction, desorption was carried out in a desorption vessel under reduced pressure at a pressure of 5 MPa and a temperature of 45 °C to obtain the crude extract. Molecular distillation purification: The crude extract is separated by molecular distillation to remove high-boiling-point impurities. The distillation temperature is 80℃ and the vacuum degree is 5Pa. Aqueous phase dispersion: The purified crude extract was mixed with 1,2-propanediol at a mass ratio of 1:4, and Tween-80 at a mass percentage of 0.3% of the crude extract was added. The mixture was stirred at 1000 r / min for 30 min to obtain the peppermint extract.

6. The plant composition with soothing and repairing effects as described in claim 1 or 2, characterized in that, The preparation method of peony root extract is as follows: Raw material pretreatment: Take dried peony root, crush it to 30 mesh, soak it in 80℃ hot water for 20 minutes, filter it, and obtain solid raw material; Semi-bionic extraction: Two simulated body fluids were added sequentially at a material-to-liquid ratio of 1g:28mL. First stage: Add hydrochloric acid aqueous solution with pH 2, stir and extract at 37℃ for 40 min; Second stage: Adjust the pH to 7.4, add sodium bile acid at a mass percentage of 0.1% of the raw material, stir and extract at 40℃ for 60 min to obtain the extract; Flocculation purification: Cool the extract to room temperature, add 0.2% (by mass) of chitosan, stir well and let stand for 2 hours. Filter the supernatant through a 300-mesh filter cloth to obtain the filtrate. Concentration and drying: The filtrate was concentrated under reduced pressure at 50°C and -0.09 MPa to a thick paste, and then freeze-dried at -35°C and 15 Pa to obtain peony root extract.

7. The plant composition with soothing and repairing effects as described in claim 1 or 2, characterized in that, The preparation method of oat extract is as follows: Raw material pretreatment: Take defatted oat flour, pass it through an 80-mesh sieve, soak it in a 5% (v / v) ethanol aqueous solution for 20 minutes to remove fat-soluble impurities, and filter to obtain solid raw material; Double-enzyme synergistic extraction: Add sodium dihydrogen phosphate-disodium hydrogen phosphate buffer at pH 6 at a material-liquid ratio of 1g:35mL, add α-amylase at 0.4% by weight of solid raw material, and enzymatically hydrolyze at 70℃ for 30min; cool to 50℃, add alkaline protease at 0.3% by weight of solid raw material, and enzymatically hydrolyze for 90min to obtain the enzymatic hydrolysate; Ultrasonic-assisted extraction: Glycerol at a mass percentage of 15% was added to the enzymatic hydrolysate, and the mixture was extracted at 45°C and 100W ultrasonic power for 50 minutes to obtain the extract. Membrane separation and fractionation: The extract was centrifuged at 5000 r / min for 20 min, and the supernatant was passed through an ultrafiltration membrane with a molecular weight cutoff of 5000 Da. The permeate and retentate were collected, combined, and then concentrated through a nanofiltration membrane to a solid content of 15% to obtain a concentrate. Low-temperature drying: The concentrate was vacuum dried at 40°C and a vacuum degree of -0.08 MPa to obtain oat extract.

8. A method for preparing a plant composition with soothing and repairing effects as described in any one of claims 1-7, characterized in that, Includes the following steps: (1) Mix butanediol with water and stir for 8-12 minutes at 45-55℃ and 300-350 r / min to obtain a mixed solvent; (2) Add 1,2-hexanediol and p-hydroxyacetophenone to the mixed solvent, and heat to 58-62℃ and keep warm for 4-6 min; (3) Cool down to 38-42℃, add gentian root extract, alpine astragalus flower / leaf / stem extract and summer peppermint extract in sequence, and stir at 400-450r / min for 18-22min; (4) Continue to cool down to 33-37℃, add peony root extract and oat extract, and stir at 200-250 r / min for 13-17 min; (5) After filtration through a 300-400 mesh filter cloth, the mixture is allowed to stand and cool to room temperature to obtain the composition.

9. The method for preparing the plant composition with soothing and repairing effects as described in claim 8, characterized in that, In step (3), the three extracts are added at intervals of 3-5 minutes, and nitrogen protection is used during the stirring process.

10. A cosmetic product, characterized in that, The plant composition having soothing and repairing effects as described in any one of claims 1-7.

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