Skin care product based on plant extracts and preparation method thereof

Abstract

The invention relates to the technical field of skin care products, in particular to a skin care product based on plant extracts and a preparation method of the skin care product. Comprising the following raw materials in parts by weight: 3-6 parts of evening primrose essential oil, 5-15 parts of a broad-leaved epiphyllum extract, 3-10 parts of a plumbago auriculata extract, 3-10 parts of a neroli extract, 3-10 parts of a rosemary extract, 3-10 parts of a rose extract, 0.5-2 parts of vitamin E and 0.1-1 part of sodium hyaluronate. According to the skin care product provided by the invention, the evening primrose essential oil, the broad-leaved epiphyllum extract, the plumbago auriculata extract, the orange flower extract, the rosemary extract, the rose flower extract, the vitamin E and the sodium hyaluronate are matched by weight, and all the raw materials have a synergistic effect, so that the prepared skin care product has the effects of moisturizing, controlling oil and inhibiting bacteria; the raw materials are natural in source, pollution-free and non-irritating, the safety and the efficacy of the product are well considered, and the skin care product is suitable for various skin types.

Description

Technical Field

[0001] The present invention relates to the technical field of skin care products, and in particular to a skin care product based on plant extracts and a preparation method thereof. Background Art

[0002] As people's living standards improve, the demand for skin care products is growing, and they also pay more attention to the naturalness and safety of skin care products. Most traditional skin care products contain a large number of chemical ingredients. Although they can play a skin care role to a certain extent, long-term use may cause irritation to the skin and trigger adverse reactions such as allergies, making it difficult to meet consumers' demand for natural and healthy skin care products. Plant extract skin care products have gradually become a hot spot in skin care product research and development due to their natural, safe and effective characteristics. However, the existing skin care products based on plant extracts are often not scientifically reasonable in their formulations, and cannot fully exert the synergistic effects of plant extracts, resulting in poor skin care effects; there are also problems in the preparation methods such as complex processes, high costs, and easy loss of effective ingredients, which limit the large-scale production and application of skin care products based on plant extracts. Therefore, it is of great practical significance to develop a skin care product based on plant extracts with a scientific and reasonable formulation and good skin care effects. Summary of the Invention

[0003] The first object of the present invention is to provide a skin care product based on plant extracts, which is compounded with pure natural plant extracts and has good skin care effects. The second object of the present invention is to provide a method for preparing the skin care product based on plant extracts.

[0004] The present invention provides a skin care product based on plant extracts. The skin care product comprises the following raw materials in parts by weight: 3-6 parts of evening primrose essential oil, 5-15 parts of epiphyllum extract, 3-10 parts of cyanus floret extract, 3-10 parts of orange blossom extract, 3-10 parts of rosemary extract, 3-10 parts of rose extract, 0.5-2 parts of vitamin E, and 0.1-1 parts of sodium hyaluronate.

[0005] Preferably, the evening primrose essential oil is prepared by the following method:

[0006] (1) Enzymatic pretreatment: Cellulase, pectinase, and papain were mixed uniformly in a mass ratio of (3-4):(2-3):1 to obtain a composite enzyme, and then the composite enzyme was mixed with evening primrose seeds in a mass ratio of 1:20-25, deionized water was added, and the pH value of the system was adjusted to 4.5-5.5, and enzymatic hydrolysis was carried out at 40-50°C for 3-4 hours;

[0007] (2) Cell wall breaking and strengthening treatment: then the temperature is raised to 55-60°C and maintained for 1-2 hours, followed by ultrasonic treatment for 10-15 minutes;

[0008] (3) Distillation extraction: The material after ultrasonic treatment is subjected to steam distillation to obtain the evening primrose essential oil.

[0009] Preferably, in step (1), the pH value of the system is adjusted using an acetic acid-sodium acetate buffer solution.

[0010] Preferably, the frequency of the ultrasonic treatment in step (2) is 35-45 kHz, and the power density is 1.5-2.5 W / mL.

[0011] Preferably, the steam distillation pressure in step (3) is 0.15-0.25 MPa.

[0012] The evening primrose essential oil provided by the present invention can fully destroy the cell structure of evening primrose seeds through a specific enzyme combination and enzymatic hydrolysis conditions, combined with ultrasonic-assisted treatment, so that the effective ingredients are more easily released. Compared with traditional extraction methods, the extraction efficiency of the evening primrose essential oil is significantly improved. During the entire extraction process, the enzymatic hydrolysis temperature is controlled at 40-60°C and the distillation pressure is moderate, which effectively reduces the extraction temperature, avoids the loss of heat-sensitive components in the evening primrose essential oil due to high temperature, and retains the active ingredients and natural quality of the essential oil to the greatest extent.

[0013] The method for preparing the plant extract-based skin care product provided by the present invention comprises the following steps:

[0014] S1. Epiphyllum, rosemary, blue snow flower, and orange flower were respectively added to an ethanol solution for extraction, filtered, and the filtrate was concentrated under reduced pressure to obtain an epiphyllum extract, a rosemary extract, a blue snow flower extract, and an orange flower extract, respectively;

[0015] S2. Sodium hyaluronate was added to deionized water and stirred to prepare a sodium hyaluronate solution having a mass fraction of 1%-5%;

[0016] S3. According to the formula ratio, epiphyllum extract, rosemary extract, blue snow flower extract, orange flower extract, rose extract, evening primrose essential oil and vitamin E are weighed in sequence, mixed evenly, and then added to the sodium hyaluronate solution, stirred and mixed at 30-50°C for 30-60 minutes to obtain a skin care product.

[0017] Preferably, the preparation process of the Epiphyllum cyrtonema extract in step S1 is as follows: take fresh Epiphyllum cyrtonema, wash it, dry it and chop it, add ethanol solution at a mass ratio of 1:8-1:10, reflux extract at 78-85°C for 8-10 hours, filter, and concentrate the filtrate under reduced pressure to obtain the Epiphyllum cyrtonema extract.

[0018] Preferably, the preparation process of the blue snow flower extract in step S1 is as follows: take the flowers and stems and leaves of fresh blue snow flower, wash them, dry them and chop them, add ethanol solution at a mass ratio of 1:8-1:10, stir and extract at 45-65°C for 6-8 hours, filter, and concentrate the filtrate under reduced pressure to obtain the blue snow flower extract.

[0019] Preferably, the preparation process of the orange flower extract in step S1 is as follows: take fresh orange flower, add ethanol solution at a mass ratio of 1:8-1:10, perform microwave-assisted extraction at 55-75° C. for 30-50 minutes, filter, and concentrate the filtrate under reduced pressure to obtain the orange flower extract.

[0020] Preferably, the preparation process of the rosemary extract in step S1 is as follows: dry rosemary is taken, crushed and then passed through a 40-60 mesh sieve, an ethanol solution is added at a mass ratio of 1:8-1:10, reflux extraction is carried out at 78-85° C. for 3-5 hours, filtered, and the filtrate is concentrated under reduced pressure to obtain the rosemary extract.

[0021] The evening primrose essential oil added to the skin care product provided by the present invention works synergistically with the blue snow flower extract, the epiphyllum extract, and the rose extract to form a thin oil film on the skin surface, thereby reducing the evaporation of skin moisture and playing a role in locking in moisture and moisturizing. At the same time, it can also enhance the stability of skin cell membranes, improve the barrier function of the skin, and help maintain the moisture content of the skin; the added rosemary extract and the orange blossom extract work synergistically to regulate the oil secretion balance of the skin, shrink pores, reduce the discharge channels of oil, and reduce the oil secretion amount of oily skin without causing excessive irritation to the skin; the added evening primrose essential oil works synergistically with the rosemary extract and the rose extract to have antibacterial and anti-inflammatory effects, thereby helping to prevent and improve skin problems caused by bacterial infection, and simultaneously relieve skin inflammation, thus helping to maintain skin health.

[0022] In summary, the present invention has the following advantages:

[0023] The skin care product provided by the present invention is prepared by mixing evening primrose essential oil, epiphyllum extract, blue snow flower extract, orange flower extract, rosemary extract, rose extract, vitamin E and sodium hyaluronate in a weight ratio. The raw materials act synergistically, so that the prepared skin care product has the effects of moisturizing, oil control and antibacterial. The raw materials are naturally polluted and non-irritating, and the safety and efficacy of the product are well taken into account. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular also includes the plural. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] A skin care product based on plant extracts is made from the following raw materials in parts by weight: 6 parts of evening primrose essential oil, 10 parts of epiphyllum extract, 10 parts of blue snow flower extract, 8 parts of orange flower extract, 8 parts of rosemary extract, 5 parts of rose extract, 0.5 parts of vitamin E, and 0.5 parts of sodium hyaluronate.

[0029] Wherein evening primrose essential oil is prepared by the following method:

[0030] (1) Enzymatic pretreatment: Cellulase, pectinase, and papain were mixed in a mass ratio of 4:3:1 to obtain a composite enzyme, and then the composite enzyme was mixed with evening primrose seeds in a mass ratio of 1:20, deionized water (the mass of deionized water was twice the mass of evening primrose seeds) was added, and the pH value was adjusted to 5.0 with an acetic acid-sodium acetate buffer solution system, and enzymatic hydrolysis was carried out at 45°C for 4 hours;

[0031] (2) Cell wall breaking and strengthening treatment: the temperature was then raised to 55°C and maintained for 1.5 hours, followed by ultrasonic treatment for 10 minutes at an ultrasonic frequency of 40 kHz and a power density of 2.0 W / mL;

[0032] (3) Distillation extraction: The material after ultrasonic treatment is subjected to steam distillation at a distillation pressure of 0.2 MPa to obtain evening primrose essential oil.

[0033] The preparation process of the above-mentioned skin care product is specifically as follows:

[0034] S1. Epiphyllum, rosemary, blue snow flower, and orange flower were respectively added to ethanol solution for extraction, filtered, and the filtrate was concentrated under reduced pressure to obtain Epiphyllum extract, rosemary extract, blue snow flower extract, and orange flower extract, as follows:

[0035] The preparation process of the epiphyllum extract is as follows: fresh epiphyllum is taken, washed, dried and chopped, and a 90% ethanol solution by volume is added at a mass ratio of 1:10, refluxed and extracted at 80° C. for 8 hours, filtered, and the filtrate is concentrated under reduced pressure to obtain the epiphyllum extract;

[0036] The preparation process of the blue snow flower extract is as follows: fresh blue snow flower flowers and stems and leaves are taken, washed, dried and chopped, and a 90% ethanol solution is added at a mass ratio of 1:10, and the mixture is stirred and extracted at 55°C for 6 hours, filtered, and the filtrate is concentrated under reduced pressure to obtain the blue snow flower extract;

[0037] The preparation process of orange blossom extract is as follows: fresh orange blossom is taken, added to a 90% ethanol solution by volume at a mass ratio of 1:10, subjected to microwave-assisted extraction at 70° C. for 30 minutes, filtered, and the filtrate is concentrated under reduced pressure to obtain the orange blossom extract;

[0038] The preparation process of rosemary extract is as follows: take dried rosemary, grind it and pass it through a 40-mesh sieve, add a 90% ethanol solution with a volume fraction of 1:10 at a solid-liquid ratio, reflux extract at 80°C for 5 hours, filter, and concentrate the filtrate under reduced pressure to obtain the rosemary extract.

[0039] S2. Sodium hyaluronate was added to deionized water and stirred to prepare a 1% sodium hyaluronate solution by mass;

[0040] S3. According to the formula ratio, weigh the epiphyllum extract, rosemary extract, blue snow flower extract, orange flower extract, rose extract, evening primrose essential oil and vitamin E in sequence, mix them evenly, and then add them to the sodium hyaluronate solution prepared in step S2, stir and mix at 40°C for 30 minutes to obtain a skin care product.

[0041] The rose extract in the present invention is a commercially available product (CAS: 90106-38-0).

[0042] Example 2

[0043] A skin care product based on plant extracts is made from the following raw materials in parts by weight: 5 parts of evening primrose essential oil, 15 parts of epiphyllum extract, 8 parts of blue snow flower extract, 6 parts of orange blossom extract, 10 parts of rosemary extract, 3 parts of rose extract, 1.5 parts of vitamin E, and 1 part of sodium hyaluronate.

[0044] The rest of the technical solutions are consistent with those in Example 1.

[0045] Example 3

[0046] A skin care product based on plant extracts is made from the following raw materials in parts by weight: 3 parts of evening primrose essential oil, 5 parts of epiphyllum extract, 3 parts of blue snow flower extract, 3 parts of orange flower extract, 3 parts of rosemary extract, 10 parts of rose extract, 2 parts of vitamin E, and 1 part of sodium hyaluronate.

[0047] The rest of the technical solutions are consistent with those in Example 1.

[0048] Example 4

[0049] A skin care product based on plant extracts is made from the following raw materials in parts by weight: 4 parts of evening primrose essential oil, 8 parts of epiphyllum extract, 10 parts of blue snow flower extract, 10 parts of orange flower extract, 10 parts of rosemary extract, 10 parts of rose extract, 0.5 parts of vitamin E, and 0.1 parts of sodium hyaluronate.

[0050] The rest of the technical solutions are consistent with those in Example 1.

[0051] Example 5

[0052] A skin care product based on plant extracts is consistent with the technical solution in Example 1, except that the preparation method of evening primrose essential oil used in this embodiment is different from that in Example 1, as follows:

[0053] (1) Enzymatic pretreatment: Cellulase, pectinase, and papain were mixed in a mass ratio of 3:2:1 to obtain a composite enzyme, and then the composite enzyme was mixed with evening primrose seeds in a mass ratio of 1:20, deionized water (the mass of deionized water was twice the mass of evening primrose seeds) was added, and the pH value was adjusted to 5.0 with an acetic acid-sodium acetate buffer solution system, and enzymatic hydrolysis was carried out at 45°C for 4 hours;

[0054] (2) Cell wall breaking and strengthening treatment: the temperature was then raised to 60°C and maintained for 2 hours, followed by ultrasonic treatment for 10 minutes at an ultrasonic frequency of 40 kHz and a power density of 2.0 W / mL;

[0055] (3) Distillation extraction: The material after ultrasonic treatment is subjected to steam distillation at a distillation pressure of 0.2 MPa to obtain evening primrose essential oil.

[0056] Example 6

[0057] A skin care product based on plant extracts. The technical solution in this embodiment is basically the same as that in Example 1, except that: in the preparation process of the skin care product in this embodiment, in step S2, sodium hyaluronate is added to deionized water and stirred evenly to prepare a sodium hyaluronate solution with a mass fraction of 3%.

[0058] Comparative Example 1

[0059] A skin care product. The technical solution of this comparative example is basically the same as that of Example 1, except that the preparation method of evening primrose essential oil in this comparative example is different from that in Example 1, as follows:

[0060] (1) Cellulase and pectinase were mixed in a mass ratio of 1:1 to obtain a composite enzyme, and then the composite enzyme was mixed with evening primrose seeds in a mass ratio of 1:20, deionized water (the mass of the deionized water was 2 times the mass of the evening primrose seeds) was added, and the pH value was adjusted to 5.0 with an acetic acid-sodium acetate buffer solution system, and enzymolysis was carried out at 45°C for 4 hours;

[0061] (2) Cell wall breaking and strengthening treatment: the temperature was then raised to 55°C and maintained for 1.5 hours, followed by ultrasonic treatment for 10 minutes at an ultrasonic frequency of 40 kHz and a power density of 2.0 W / mL;

[0062] (3) Distillation extraction: The material after ultrasonic treatment is subjected to steam distillation at a distillation pressure of 0.2 MPa to obtain evening primrose essential oil.

[0063] Comparative Example 2

[0064] A skin care product is prepared from the following raw materials in parts by weight: 6 parts evening primrose essential oil, 8 parts orange blossom extract, 8 parts rosemary extract, 5 parts rose extract, 0.5 parts vitamin E, and 0.5 parts sodium hyaluronate. The remaining technical solutions are consistent with those in Example 1.

[0065] Comparative Example 3

[0066] A skin care product is prepared from the following raw materials in parts by weight: 6 parts evening primrose essential oil, 10 parts epiphyllum extract, 10 parts cyanus floret extract, 8 parts rosemary extract, 5 parts rose extract, 0.5 parts vitamin E, and 0.5 parts sodium hyaluronate. The remaining technical solutions are consistent with those in Example 1.

[0067] Comparative Example 4

[0068] A skin care product is prepared from the following raw materials in parts by weight: 10 parts of Epiphyllum scabra extract, 10 parts of Cercidiphyllum cyanus extract, 8 parts of Orange Flower extract, 8 parts of Rosemary extract, 5 parts of Rose Flower extract, 0.5 parts of Vitamin E, and 0.5 parts of Sodium Hyaluronate. The remaining technical solutions are the same as those in Example 1.

[0069] Comparative Example 5

[0070] A skin care product. The technical solution of this comparative example is basically the same as that of Example 1, except that: in the preparation process of the skin care product of this comparative example, in step S2, sodium hyaluronate is added to deionized water and stirred evenly to prepare a sodium hyaluronate solution with a mass fraction of 8%.

[0071] Test 1: Moisturizing test

[0072] The moisturizing efficacy of the skin care products in Examples 1-6 and Comparative Examples 1-5 was tested and verified. The moisturizing function of the 11 groups of products was evaluated by measuring the moisture content of the back of the hand. The test process is as follows:

[0073] Subject Selection: Fifty-five healthy volunteers aged 18-35 with no history of skin disease were selected as subjects, divided into groups of five. The subjects were treated with the skin care products of Examples 1-6 and Comparative Examples 1-5. All subjects did not use any moisturizing skin care products within 24 hours prior to testing and avoided contact with irritants and strenuous exercise during the testing period.

[0074] Basic data collection: The subjects entered a constant temperature and humidity test environment (temperature 22±2°C, relative humidity 40%±5%) and sat quietly for 30 minutes. After the skin condition stabilized, a skin moisture tester was used to measure the initial skin moisture content of a specific area on the back of the subject's left hand (area approximately 2cm×2cm). Each area was measured three times, and the average value was taken as the basic data.

[0075] Product application: Each subject evenly applies one of the products on the back of the left hand, with an application amount of 0.5g, ensuring that the application area is consistent with the measurement area.

[0076] Measurements at different time points: 1 hour, 2 hours, 4 hours, 8 hours, and 12 hours after applying the product, use the skin moisture tester to measure the skin moisture content of the same area again. Measure each area 3 times, take the average value and record the data.

[0077] Data processing and analysis: Statistical analysis was performed on the skin moisture data of the 11 groups of skin care products at different time points. The moisture content of each group of skin care products at each time point was calculated, and the moisturizing function of the 11 groups of skin care products was evaluated. The test results are shown in Table 1.

[0078] Table 1 Skin moisture content after using different skin care products

[0079]

[0080] As can be seen from Table 1, the skin care products provided by Examples 1-6 of the present invention have a small change in moisture content within 8 hours of application, and can still have a moisturizing effect within 12 hours, among which the skin care product prepared by Example 6 of the present invention has the best moisturizing effect. From the data analysis of Example 1, Comparative Example 1 and Comparative Example 4, it can be seen that the evening primrose essential oil provided by the present invention can significantly improve the timeliness of the skin moisturizing of the skin care product. In Comparative Example 2, blue snow flower extract and epiphyllum extract are not added, and its moisturizing effect is slightly worse than that of Example 1, especially from the perspective of long-term moisturizing. The blue snow flower extract and epiphyllum extract added to the skin care product provided by the present invention can significantly improve the moisturizing effect of the skin care product.

[0081] Test 2: Oil Control Test

[0082] 55 volunteers with oily facial skin (aged 18-35) were selected and divided into 11 groups, with 5 people in each group. After cleansing their faces, 2 mL of the skin care products of Examples 1-6 and Comparative Examples 1-5 were applied to each group in a constant temperature and humidity environment. The initial value of the skin oil content (μg / cm2) was measured using a skin oil tester on two areas of the forehead. 2 ), the area without any skin care products was the control group, and the area with skin care products was the experimental group. 0.5 hours, 1 hour, 2 hours, 4 hours, and 8 hours after applying the skin care products, the oil content of the experimental group was measured again according to the measurement points and methods used in basic data collection. Each area was measured three times and the average was taken. The data of each measurement was recorded in detail, and the oil reduction rate within the corresponding time was calculated. Oil reduction rate = (blank group oil content - experimental group oil content) / blank group oil content × 100%. The test results are shown in Table 2:

[0083] Table 2 Oil reduction rate of different skin care products

[0084]

[0085]

[0086] The skin care products provided by Examples 1-6 of the present invention exhibited significant oil-control effects within four hours, and the oil-control effect lasted for up to eight hours. Comparative Examples 1-5 exhibited good oil-control effects within the first four hours, but lacked long-term oil-control effects, with the oil-control effect significantly declining after the eighth hour. In particular, the sodium hyaluronate concentration in Comparative Example 5 was higher than that in Example 1, yet the oil-control effect was worse. This suggests that excessively high sodium hyaluronate concentrations can affect the interactions and synergistic effects between ingredients, potentially preventing some ingredients from fully dissolving or dispersing. This can lead to a greasy or heavy feeling during use, slowing absorption, and thus limiting its effectiveness.

[0087] Through the five comparative examples, it can be found that different plant combinations will also affect the oil-control effect of the final extract, indicating that the oil-control effect of the skin care product provided by the present invention is achieved through the combined action of the extracts of all raw material components.

[0088] Test 3: Antibacterial effect test

[0089] The antibacterial effect of different skin care products was tested using the inhibition zone method: on a culture medium inoculated with the test strain, the skin care products prepared in quantitative Examples 1-6 and Comparative Examples 1-5 were applied, and the diffusion and osmotic effect of the skin care products in the agar culture medium was utilized. After a certain period of time, the sample penetration and diffusion reached a certain range. In the range reached by the antibacterial concentration, the growth of the indicator bacteria was inhibited, and a sterile transparent area was produced, which was called the inhibition zone. Under certain conditions and within a certain range, the diameter of the inhibition zone is a linear function of the logarithm of the sample concentration. Using this principle, the toxicity of the bactericide can be compared, or the content of the active ingredient in the sample can be determined. Three parallel experiments were performed for each group of skin care products. The final experimental result was the average value of the three parallel values (the diameter of the inhibition zone) as the final result. The test results are shown in Table 3.

[0090] Table 3 Antibacterial test

[0091] Group Propionibacterium acnes Staphylococcus aureus Example 1 22.7mm 16.42mm Example 2 22.1mm 16.61mm Example 3 19.8mm 15.38mm Example 4 21.9mm 16.12mm Example 5 20.3mm 15.89mm Comparative Example 1 16.5mm 11.91mm Comparative Example 2 15.7mm 11.87mm Comparative Example 3 14.3mm 10.99mm Comparative Example 4 13.1mm 12.5mm Comparative Example 5 14.9mm 13.78mm

[0092] Judgment criteria: Insensitive if the diameter of the inhibition zone is less than 8 mm, low sensitivity if 8-13 mm, moderate sensitivity if 13-19 mm, and high sensitivity if 19 mm or larger. Analysis of the data in Table 3 shows that the antibacterial effect of Comparative Example 4, which does not contain evening primrose essential oil, is significantly reduced compared to Example 1. This indicates that the addition of evening primrose essential oil in the present invention can enhance the antibacterial effect of the product and reduce skin problems (such as acne and allergies) caused by the growth of Propionibacterium acnes and Staphylococcus aureus.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A skin care product based on plant extracts, characterized in that, The invention comprises the following raw materials in parts by weight: 3-6 parts of evening primrose essential oil, 5-15 parts of epiphyllum extract, 3-10 parts of cyanus leucophyllum extract, 3-10 parts of orange blossom extract, 3-10 parts of rosemary extract, 3-10 parts of rose extract, 0.5-2 parts of vitamin E and 0.1-1 parts of sodium hyaluronate.

2. The skin care product according to claim 1, characterized in that The evening primrose essential oil is prepared by the following method: (1) Enzymatic pretreatment: Cellulase, pectinase, and papain were mixed uniformly in a mass ratio of (3-4):(2-3):1 to obtain a composite enzyme, and then the composite enzyme was mixed with evening primrose seeds in a mass ratio of 1:20-25, deionized water was added, and the pH value of the system was adjusted to 4.5-5.5, and enzymatic hydrolysis was carried out at 40-50°C for 3-4 hours; (2) Cell wall breaking and strengthening treatment: then heating to 55-60°C and maintaining for 1-2 hours, followed by ultrasonic treatment for 10-15 minutes; (3) Distillation extraction: The material after ultrasonic treatment is subjected to steam distillation to obtain the evening primrose essential oil.

3. The skin care product according to claim 2, characterized in that In the step (1), the pH value of the system is adjusted using an acetic acid-sodium acetate buffer solution.

4. The skin care product according to claim 2, characterized in that The frequency of the ultrasonic treatment in step (2) is 35-45 kHz, and the power density is 1.5-2.5 W / mL.

5. The skin care product according to claim 2, characterized in that The steam distillation pressure in step (3) is 0.15-0.25 MPa.

6. A method for preparing a skin care product based on plant extracts according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Epiphyllum, rosemary, blue snow flower, and orange flower were respectively added to an ethanol solution for extraction, filtered, and the filtrate was concentrated under reduced pressure to obtain an epiphyllum extract, a rosemary extract, a blue snow flower extract, and an orange flower extract, respectively; S2. Sodium hyaluronate was added to deionized water and stirred to prepare a sodium hyaluronate solution having a mass fraction of 1%-5%; S3. According to the formula ratio, epiphyllum extract, rosemary extract, blue snow flower extract, orange flower extract, rose extract, evening primrose essential oil and vitamin E are weighed in sequence, mixed evenly, and then added to the sodium hyaluronate solution, stirred and mixed at 30-50°C for 30-60 minutes to obtain a skin care product.

7. The preparation method according to claim 6, characterized in that The preparation process of the epiphyllum extract in step S1 is as follows: take fresh epiphyllum, wash it, dry it and chop it, add ethanol solution at a mass ratio of 1:8-1:10, reflux extract at 78-85°C for 8-10 hours, filter, and concentrate the filtrate under reduced pressure to obtain the epiphyllum extract.

8. The preparation method according to claim 6, characterized in that The preparation process of the cyanus floret extract in step S1 is as follows: take the flowers and stems and leaves of fresh cyanus floret, wash them, dry them in the air and chop them, add ethanol solution at a mass ratio of 1:8-1:10, stir and extract at 45-65°C for 6-8 hours, filter, and concentrate the filtrate under reduced pressure to obtain the cyanus floret extract.

9. The preparation method according to claim 6, characterized in that The preparation process of the orange blossom extract in step S1 is as follows: taking fresh orange blossom, adding ethanol solution at a mass ratio of 1:8-1:10, performing microwave-assisted extraction at 55-75° C. for 30-50 minutes, filtering, and concentrating the filtrate under reduced pressure to obtain the orange blossom extract.

10. The preparation method according to claim 6, characterized in that The preparation process of the rosemary extract in step S1 is as follows: dried rosemary is taken, crushed and then passed through a 40-60 mesh sieve, an ethanol solution is added at a material-liquid ratio of 1:8-1:10, reflux extraction is carried out at 78-85° C. for 3-5 hours, filtered, and the filtrate is concentrated under reduced pressure to obtain the rosemary extract.

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