Shower gel with whitening and skin tendering effects and preparation method thereof
By combining ginger grass roots, striped seaweed, tamarind bark/root, Mediterranean cypress cones and lemon bark leaf extract with surfactant, shower gel that has both whitening and moisturizing effects is prepared, which solves the problem that existing shower gel cannot take into account both whitening and moisturizing, and achieves a safe and gentle cleansing and nourishing effect.
Patent Information
- Application Number
- CN202510756969.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-09
- Publication Date
- 2025-08-15
AI Technical Summary
Existing shower gels cannot take into account the effects of whitening and moisturizing, and at the same time, sebum can easily be taken away during the cleaning process, causing dryness and tightness of the skin.
The shower gel is prepared through specific extraction and mixing processes to ensure the safe and gentle ingredients of the ingredients are prepared by specific extraction and mixing processes.
It achieves a strong whitening effect while cleaning, moisturizing and water-locking, improving skin elasticity, avoiding tightness after cleaning, and has good application prospects.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of daily chemical products, in particular to a shower gel with skin whitening and tenderizing effects and a preparation method thereof. Background Art
[0002] Shower gel, also known as bath milk, is a liquid cleanser used in the shower and is a common modern cleaning product. Its invention primarily sought to replace the feel and effectiveness of traditional soap. Shower gel doesn't feel as harsh on the skin as soap, overcoming the drawbacks of soap, such as its high pH, drying and degreasing properties, and low lather. It gently moisturizes the skin without causing irritation, making it a popular choice among consumers.
[0003] Shower gels typically contain both cleansing and skincare ingredients, effectively cleansing the skin while also providing moisturizing, nourishing, soothing, and emollient benefits. With the development of society and people's pursuit of a better quality of life, there are increasing demands for the functionality and efficacy of shower gels, requiring them to effectively whiten, brighten, and moisturize the skin while cleansing. However, current shower gels on the market fail to achieve both whitening and emollient benefits, resulting in limitations in their use. Furthermore, current shower gels remove sebum while cleansing, leaving the skin dry and tight.
[0004] Therefore, developing a shower gel that is both whitening and moisturizing and has no irritation and safe ingredients is a technical problem that needs to be solved urgently. Summary of the Invention
[0005] In view of this, the present invention provides a shower gel with skin whitening and tenderizing effects and a preparation method thereof.
[0006] The technical solution of the present invention is achieved as follows:
[0007] A shower gel with skin whitening and tendering effects, comprising, by weight percentage, 2-15% of an effective composition and the remainder of auxiliary materials;
[0008] The efficacy composition comprises the following raw materials in parts by weight: 2-4 parts of Elytium wilfordii root extract, 3-5 parts of Porphyra yezoensis extract, 3-5 parts of Terminalia sericea bark / root extract, 1-3 parts of Cupressus truncatus cone extract, 1-2 parts of Lemongrass citronella leaf extract, and 4-6 parts of lemongrass leaf oil;
[0009] The auxiliary materials include the following raw materials in parts by weight: 1-3 parts of surfactant, 4-6 parts of moisturizer, 0.3-0.5 parts of thickener, 0.06-0.08 parts of pH regulator, 0.05-0.08 parts of chelating agent, 0.03-0.05 parts of preservative and 90-100 parts of water.
[0010] Furthermore, the surfactant is cocamidopropyl betaine; the moisturizer is glycerin or butylene glycol; the thickener is xanthan gum, guar gum or hydroxypropyl methylcellulose; and the preservative is phenoxyethanol.
[0011] Furthermore, the preparation of the Elytium truncatum root extract comprises: crushing the Elytium truncatum root and adding it to an ethanol solution, extracting it by ultrasonic hypoxia, centrifuging it, collecting the supernatant, passing it through an ultrafiltration membrane with a molecular weight cutoff of less than 2000Da, and drying it to obtain the Elytium truncatum root extract;
[0012] The solid-liquid ratio of the Elytium grass root to the ethanol solution is 1:15-25 g / mL; the volume concentration of the ethanol solution is 40-60%; and the ultrasonic low-oxygen extraction is performed at an oxygen content of less than 4%, 20-30 kHz, and 40-50° C. for 1-2 hours.
[0013] Furthermore, the preparation of the Porphyra yezoensis extract comprises: crushing the Porphyra yezoensis, adding the Porphyra yezoensis into water, performing ultrasonic extraction, collecting the supernatant, and concentrating the supernatant under reduced pressure to obtain the Porphyra yezoensis extract;
[0014] The material-liquid ratio of Porphyra yezoensis to water is 1:10-15 g / mL; the frequency of the ultrasonic extraction is 30-40 kHz, the temperature is 50-60° C., and the time is 2-4 hours.
[0015] Furthermore, the preparation of the Terminalia sericea bark / root extract includes: crushing the Terminalia sericea bark / root, placing it in a supercritical CO2 extraction device, extracting it at 40-50°C and 30-40MPa for 40-60 minutes, and concentrating the extract under reduced pressure to obtain the Terminalia sericea bark / root extract.
[0016] Furthermore, the preparation of the Mediterranean cedar cone extract includes: crushing fresh Mediterranean cedar cones, adding them to a phosphate buffer, ultrasonically treating them, then treating them at medium temperature and high pressure, centrifuging them, passing the supernatant through an ultrafiltration membrane with a molecular weight cutoff of less than 3000Da, and drying them to obtain the Mediterranean cedar cone extract;
[0017] The solid-liquid ratio of the Mediterranean cypress cones to the phosphate buffer is 1:8-10 g / mL; the concentration of the phosphate buffer is 0.1-0.2 mol / L, and the pH is 7.5-8.0; the ultrasonic treatment is carried out at 20-30 kHz and 40-50° C. for 40-50 min; and the medium-temperature and high-pressure treatment is carried out at 2-4 MPa and 80-90° C. for 6-10 min.
[0018] Furthermore, the preparation of the lemon bark leaf extract comprises: crushing the lemon bark leaf, adding it to deionized water, performing hot-pressing distillation extraction, and concentrating the extract under reduced pressure to obtain the lemon bark leaf extract;
[0019] The material-liquid ratio of the lemon bark leaf to deionized water is 1:8-12 g / mL; the hot-pressed distillation extraction is performed at 0.2-0.3 MPa and a temperature of 100-110° C. for 40-50 minutes.
[0020] A method for preparing a shower gel with skin whitening and tenderizing effects, the specific preparation steps comprising:
[0021] (1) adding a surfactant and a chelating agent into water, heating and stirring to obtain an aqueous phase;
[0022] (2) adding a moisturizing agent and a thickener to lemongrass leaf oil, heating and stirring to obtain an oil phase;
[0023] (3) Add the oil phase to the water phase, homogenize, cool to room temperature, add Elytium wilfordii root extract, Porphyra yezoensis extract, Terminalia sericea bark / root extract, Cupressus truncatus cone extract, and Lemon Balm leaf extract and continue stirring, then add pH adjuster and preservative, stir evenly to obtain the target shower gel.
[0024] Furthermore, in step (1), the heating and stirring is carried out at 60-70°C and 100-200 rpm for 40-60 min; and in step (2), the heating and stirring is carried out at 70-80°C and 250-350 rpm for 30-50 min.
[0025] Furthermore, in step (3), the homogenization is carried out at 2000-3000 rpm for 5-10 minutes; and the stirring time is continued for 20-30 minutes.
[0026] Compared with the prior art, the present invention has the following beneficial effects:
[0027] 1. The extracts of the functional composition in the shower gel of the present invention are scientifically compounded and work together to make the shower gel have a strong whitening effect while maintaining cleanliness. The raw materials of the present invention are mild and safe, have no irritation to the skin, can nourish and moisturize the skin, and lock in moisture, and are very practical.
[0028] 2. The active substances obtained from the extracts of the present invention through a specific extraction method are highly stable, can inhibit melanin production, promote melanin degradation, achieve whitening effects, and can also enhance the elasticity and moisturizing ability of the skin, avoiding the uncomfortable feeling of tight skin after cleansing, and have good application prospects. DETAILED DESCRIPTION
[0029] In order to better understand the technical content of the present invention, specific examples are provided below to further illustrate the present invention.
[0030] Unless otherwise specified, the experimental methods used in the examples of the present invention are all conventional methods.
[0031] Unless otherwise specified, the materials, reagents, etc. used in the examples of the present invention can be obtained from commercial sources.
[0032] The pH adjuster of the present invention is citric acid.
[0033] Example 1
[0034] A shower gel with skin whitening and tendering effects, comprising, by weight, 5% of an effective composition and 95% of auxiliary materials;
[0035] The efficacy composition comprises the following raw materials in parts by weight: 3 parts of Elytium wilfordii root extract, 4 parts of Porphyra yezoensis extract, 4 parts of Terminalia sericea bark / root extract, 2 parts of Cupressus thunbergii cone extract, 1.5 parts of Lemongrass citronella leaf extract, and 5 parts of Lemongrass citronella leaf oil;
[0036] The auxiliary materials include the following raw materials in parts by weight: 2 parts of cocamidopropyl betaine, 5 parts of butylene glycol, 0.4 parts of hydroxypropyl methylcellulose, 0.07 parts of pH regulator, 0.07 parts of disodium EDTA, 0.04 parts of phenoxyethanol and 95 parts of water.
[0037] The preparation method of the above-mentioned shower gel with skin whitening and tendering effects comprises the following specific steps:
[0038] (1) Preparation of Elytrinum truncatum root extract: The Elytrinum truncatum root was crushed and added to a 50% v / v ethanol solution at a solid-liquid ratio of 1:15-25 g / mL. The mixture was extracted at 25 kHz and 45°C for 1-2 h at an oxygen content of less than 4%. The supernatant was collected by centrifugation and passed through an ultrafiltration membrane with a molecular weight cutoff of less than 2000 Da, and dried to obtain the Elytrinum truncatum root extract.
[0039] (2) Preparation of Porphyra yezoensis extract: Porphyra yezoensis was crushed and added to water at a solid-liquid ratio of 1:13 g / mL. Ultrasonic extraction was performed at 35 kHz and 55°C for 3 h. The supernatant was collected and concentrated under reduced pressure to obtain the Porphyra yezoensis extract.
[0040] (3) Preparation of the Terminalia sericea bark / root extract: The Terminalia sericea bark / root was crushed and placed in a supercritical CO2 extraction apparatus. The extraction was performed at 45°C and 35 MPa for 50 min, and the extract was concentrated under reduced pressure to obtain the Terminalia sericea bark / root extract.
[0041] (4) Preparation of the Mediterranean Cupressus cone extract: Fresh Mediterranean Cupressus cones were crushed and added to 0.1 mol / L phosphate buffer (pH = 7.5-8.0) at a solid-liquid ratio of 1:9 g / mL. The mixture was ultrasonically treated at 25 kHz and 45°C for 45 min, then at 3 MPa and 85°C for 8 min. The mixture was centrifuged, and the supernatant was passed through an ultrafiltration membrane with a molecular weight cutoff of less than 3000 Da and dried to obtain the Mediterranean Cupressus cone extract.
[0042] (5) Preparation of Lemon Bahao Leaf Extract: The lemon Bahao leaf was crushed and added to deionized water at a solid-liquid ratio of 1:10 g / mL, and subjected to hot-pressed distillation extraction, specifically: extraction at 0.25 MPa and 105°C for 45 min, and the extract was concentrated under reduced pressure to obtain the lemon Bahao leaf extract;
[0043] (6) Add cocamidopropyl betaine and disodium EDTA to water and stir at 65°C and 150 rpm for 50 min to obtain an aqueous phase;
[0044] (7) Butanediol and hydroxypropyl methylcellulose were added to lemongrass leaf oil and stirred at 75°C and 300 rpm for 40 min to obtain an oil phase;
[0045] (8) The oil phase was added to the aqueous phase and homogenized at 2500 rpm for 8 min. The mixture was cooled to room temperature. The root extract of Elytium wilfordii, the extract of Porphyra yezoensis, the bark / root extract of Terminalia sericea, the cone extract of Cupressus sylvestris, and the leaf extract of Lemon Basil were added and the mixture was stirred for 25 min. Then, citric acid and phenoxyethanol were added and stirred evenly to obtain the target shower gel.
[0046] Example 2
[0047] A shower gel with skin whitening and tendering effects, comprising, by weight, 2% of an effective composition and 98% of auxiliary materials;
[0048] The efficacy composition comprises the following raw materials in parts by weight: 2 parts of Elytium wilfordii root extract, 3 parts of Porphyra yezoensis extract, 3 parts of Terminalia sericea bark / root extract, 1 part of Cupressus truncatus cone extract, 1 part of Lemongrass leaf extract, and 4 parts of Lemongrass leaf oil;
[0049] The auxiliary materials include the following raw materials in parts by weight: 1 part of cocamidopropyl betaine, 4 parts of butylene glycol, 0.3 parts of hydroxypropyl methylcellulose, 0.06 parts of pH regulator, 0.05 parts of disodium EDTA, 0.03-0.05 parts of phenoxyethanol and 90 parts of water.
[0050] The preparation method of the above-mentioned shower gel with skin whitening and tendering effects comprises the following specific steps:
[0051] (1) Preparation of Elytrinum truncatum root extract: The Elytrinum truncatum root was crushed and added to a 40% v / v ethanol solution at a solid-liquid ratio of 1:15 g / mL. The mixture was extracted at 20 kHz and 40°C for 1 h at an oxygen content of less than 4%. The supernatant was collected by centrifugation and passed through an ultrafiltration membrane with a molecular weight cutoff of less than 2000 Da, and dried to obtain the Elytrinum truncatum root extract.
[0052] (2) Preparation of Porphyra yezoensis extract: Porphyra yezoensis was crushed and added to water at a solid-liquid ratio of 1:10 g / mL. Ultrasonic extraction was performed at 30 kHz and 50°C for 2 h. The supernatant was collected and concentrated under reduced pressure to obtain the Porphyra yezoensis extract.
[0053] (3) Preparation of the Terminalia sericea bark / root extract: The Terminalia sericea bark / root was crushed and placed in a supercritical CO2 extraction apparatus. The extraction was performed at 40°C and 30 MPa for 40 min, and the extract was concentrated under reduced pressure to obtain the Terminalia sericea bark / root extract.
[0054] (4) Preparation of the Mediterranean Cupressus cone extract: Fresh Mediterranean Cupressus cones were crushed and added to 0.1 mol / L phosphate buffer (pH = 7.5-8.0) at a solid-liquid ratio of 1:8 g / mL. The mixture was ultrasonically treated at 20-30 kHz and 40°C for 40 min, then at 2 MPa and 80°C for 6 min. The mixture was centrifuged and the supernatant was passed through an ultrafiltration membrane with a molecular weight cutoff of less than 3000 Da and dried to obtain the Mediterranean Cupressus cone extract.
[0055] (5) Preparation of Lemon Bahao Leaf Extract: The lemon Bahao leaf was crushed and added to deionized water at a solid-liquid ratio of 1:8 g / mL, and subjected to hot-pressed distillation extraction, specifically: extraction at 0.2 MPa and 100°C for 40 min, and the extract was concentrated under reduced pressure to obtain the lemon Bahao leaf extract;
[0056] (6) adding cocamidopropyl betaine and disodium EDTA into water and stirring at 60° C. and 100 rpm for 40 min to obtain an aqueous phase;
[0057] (7) Butanediol and hydroxypropyl methylcellulose were added to lemongrass leaf oil and stirred at 70°C and 250 rpm for 30 min to obtain an oil phase;
[0058] (8) The oil phase was added to the aqueous phase and homogenized at 2000 rpm for 5 min. The mixture was cooled to room temperature. The root extract of Elytium wilfordii, the extract of Porphyra yezoensis, the bark / root extract of Terminalia sericea, the cone extract of Cupressus sylvestris, and the leaf extract of Lemon Basil were added and the mixture was stirred for 20 min. Then, citric acid and phenoxyethanol were added and stirred evenly to obtain the target shower gel.
[0059] Example 3
[0060] A shower gel with skin whitening and tendering effects, comprising, by weight, 10% of an effective composition and 90% of auxiliary materials;
[0061] The efficacy composition comprises the following raw materials in parts by weight: 4 parts of Elytium wilfordii root extract, 5 parts of Porphyra yezoensis extract, 5 parts of Terminalia sericea bark / root extract, 3 parts of Cupressus thunbergii cone extract, 2 parts of Lemongrass citronella leaf extract, and 6 parts of Lemongrass leaf oil;
[0062] The auxiliary materials include the following raw materials in parts by weight: 3 parts of cocamidopropyl betaine, 6 parts of butylene glycol, 0.5 parts of hydroxypropyl methylcellulose, 0.08 parts of citric acid, 0.08 parts of disodium EDTA, 0.05 parts of phenoxyethanol and 100 parts of water.
[0063] The preparation method of the above-mentioned shower gel with skin whitening and tendering effects comprises the following specific steps:
[0064] (1) Preparation of Elytrinum truncatum root extract: The Elytrinum truncatum root was crushed and added to a 60% v / v ethanol solution at a solid-liquid ratio of 1:25 g / mL. The mixture was extracted at 30 kHz and 50°C for 2 h at an oxygen content of less than 4%. The supernatant was collected by centrifugation and passed through an ultrafiltration membrane with a molecular weight cutoff of less than 2000 Da, and dried to obtain the Elytrinum truncatum root extract.
[0065] (2) Preparation of Porphyra yezoensis extract: Porphyra yezoensis was crushed and added to water at a solid-liquid ratio of 1:15 g / mL. Ultrasonic extraction was performed at 40 kHz and 60°C for 4 h. The supernatant was collected and concentrated under reduced pressure to obtain the Porphyra yezoensis extract.
[0066] (3) Preparation of the Terminalia sericea bark / root extract: The Terminalia sericea bark / root was crushed and placed in a supercritical CO2 extraction apparatus. The extraction was performed at 50°C and 40 MPa for 60 min, and the extract was concentrated under reduced pressure to obtain the Terminalia sericea bark / root extract.
[0067] (4) Preparation of the Mediterranean Cupressus cone extract: Fresh Mediterranean Cupressus cones were crushed and added to 0.2 mol / L phosphate buffer (pH = 7.5-8.0) at a solid-liquid ratio of 1:10 g / mL. The mixture was ultrasonically treated at 20-30 kHz and 50°C for 50 min, then at 4 MPa and 90°C for 10 min. The mixture was centrifuged and the supernatant was passed through an ultrafiltration membrane with a molecular weight cutoff of less than 3000 Da and dried to obtain the Mediterranean Cupressus cone extract.
[0068] (5) Preparation of Lemon Bamao Leaf Extract: The lemon Bamao leaf was crushed and added to deionized water at a solid-liquid ratio of 1:12 g / mL, and subjected to hot-pressed distillation extraction, specifically, extraction at 0.3 MPa and 110°C for 50 min, and the extract was concentrated under reduced pressure to obtain the lemon Bamao leaf extract;
[0069] (6) adding cocamidopropyl betaine and disodium EDTA into water and stirring at 70° C. and 200 rpm for 60 min to obtain an aqueous phase;
[0070] (7) Butanediol and hydroxypropyl methylcellulose were added to lemongrass leaf oil and stirred at 80°C and 350 rpm for 50 min to obtain an oil phase;
[0071] (8) The oil phase was added to the aqueous phase and homogenized at 3000 rpm for 10 min. The mixture was cooled to room temperature. The root extract of Elytium wilfordii, the extract of Porphyra yezoensis, the bark / root extract of Terminalia sericea, the cone extract of Cupressus sylvestris, and the leaf extract of Lemon Basil were added and the mixture was stirred for 30 min. Then, a pH adjuster and phenoxyethanol were added and the mixture was stirred evenly to obtain the target shower gel.
[0072] Comparative Example 1
[0073] The difference from Example 1 is that the functional composition lacks the Elytium wilfordii root extract, and the amount of the missing substance is distributed to other substances according to the proportion of other functional composition substances. The rest is consistent with Example 1.
[0074] Comparative Example 2
[0075] The difference from Example 1 is that the functional composition lacks the Porphyra yezoensis extract, and the amount of the missing substance is distributed to other substances according to the proportion of other functional composition substances. Other aspects are consistent with Example 1.
[0076] Comparative Example 3
[0077] The difference from Example 1 is that the functional composition lacks the Terminalia sericea bark / root extract, and the amount of the missing substance is distributed to other substances according to the proportion of other functional composition substances. The rest is consistent with Example 1.
[0078] Comparative Example 4
[0079] The difference from Example 1 is that the functional composition lacks the Mediterranean cypress cone extract, and the amount of the missing substance is distributed to other substances according to the proportion of other functional composition substances. The rest is consistent with Example 1.
[0080] Comparative Example 5
[0081] The difference from Example 1 is that the functional composition lacks lemon bark leaf extract, and the amount of the missing substance is distributed to other substances according to the proportion of other functional composition substances. The rest is consistent with Example 1.
[0082] Comparative Example 6
[0083] The difference from Example 1 is that the extraction method of the extract is water extraction, and the rest is the same as Example 1.
[0084] Effect verification
[0085] Test Example 1
[0086] The shower gels prepared in Examples 1-3 of the present invention and Comparative Examples 1-6 were subjected to human evaluation tests;
[0087] Experimental method: A total of 90 volunteers, 45 men and 45 women, aged 20-35 years old, were selected and randomly divided into 9 groups, with 10 people in each group. Each group used the shower gel prepared in Examples 1-3 and Comparative Examples 1-6, respectively, once a day, with the dosage and the time of staying on the skin remaining basically the same each time, for 1 month.
[0088] The volunteers scored the whitening effect and skin elasticity from 1 to 10 points, and the average value was taken for each group. The test results are shown in Table 1.
[0089] Table 1
[0090]
[0091]
[0092] As can be seen from Table 1, the shower gels prepared in Examples 1-3 of the present invention have good skin whitening and rejuvenation effects, while the shower gels prepared in Comparative Examples 1-5 lack one of the extracts, and the effects are reduced, indicating that the components of the present invention are compatible with each other and synergistically enhance the effect.
[0093] Test Example 2
[0094] The skin moisture content of volunteers (Test Example 1) before and after using the shower gels of Examples 1-3 and Comparative Examples 1-6 was tested using a skin moisture content tester. The test area was the inner side of the right upper arm. The growth rate of the skin moisture content was calculated and the average value was taken. The test results are shown in Table 2.
[0095] Increase rate of skin moisture content = (skin moisture content after using the sample for 1 month - skin moisture content before using the sample) / skin moisture content before using the sample × 100%
[0096] Table 2
[0097]
[0098]
[0099] As can be seen in Table 2, the shower gels prepared in Examples 1-3 of the present invention exhibit excellent moisturizing and skin-rejuvenating properties, preventing the uncomfortable sensation of skin tightness after cleansing. Comparative Examples 1-5, lacking one of the extracts, exhibit reduced moisturizing properties, demonstrating that the components of the present invention are compatible and synergistic.
[0100] In addition, the shower gel prepared by the present invention has shown negative reactions after safety performance evaluation, which shows that the components of the present invention are mild and safe and will not cause irritation or allergic reactions to the skin.
[0101] 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, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A shower gel with skin whitening and tendering effects, characterized in that: Calculated by weight, it includes 2-15% of the efficacy composition and the balance of excipients; The efficacy composition comprises the following raw materials in parts by weight: 2-4 parts of Elytium wilfordii root extract, 3-5 parts of Porphyra yezoensis extract, 3-5 parts of Terminalia sericea bark / root extract, 1-3 parts of Cupressus truncatus cone extract, 1-2 parts of Lemongrass citronella leaf extract, and 4-6 parts of lemongrass leaf oil; The auxiliary materials include the following raw materials in parts by weight: 1-3 parts of surfactants, 4-6 parts of humectants, 0.3-0.5 parts of thickeners, 0.06-0.08 parts of pH adjusters, 0.05-0.08 parts of chelating agents, 0.03-0.05 parts of preservatives and 90-100 parts of water.
2. The shower gel with skin whitening and tenderizing effect according to claim 1, characterized in that: The surfactant is cocamidopropyl betaine; the moisturizer is glycerin or butylene glycol; the thickener is xanthan gum, guar gum or hydroxypropyl methylcellulose; and the preservative is phenoxyethanol.
3. The shower gel with skin whitening and tenderizing effect according to claim 1, characterized in that: The preparation of the Elytrinum truncatum root extract comprises: crushing the Elytrinum truncatum root into an ethanol solution, extracting the mixture by ultrasonic hypoxia, centrifuging, collecting the supernatant, filtering the supernatant through an ultrafiltration membrane with a molecular weight cutoff of less than 2000 Da, and drying the supernatant to obtain the Elytrinum truncatum root extract; The solid-liquid ratio of the Elytium grass root to the ethanol solution is 1:15-25 g / mL; the volume concentration of the ethanol solution is 40-60%; and the ultrasonic low-oxygen extraction is performed at an oxygen content of less than 4%, 20-30 kHz, and 40-50° C. for 1-2 hours.
4. The shower gel with skin whitening and tenderizing effect according to claim 1, characterized in that: The preparation of the Porphyra yezoensis extract comprises the following steps: crushing the Porphyra yezoensis, adding the Porphyra yezoensis into water, performing ultrasonic extraction, collecting the supernatant, and concentrating the supernatant under reduced pressure to obtain the Porphyra yezoensis extract; The material-liquid ratio of Porphyra yezoensis to water is 1:10-15 g / mL; the frequency of the ultrasonic extraction is 30-40 kHz, the temperature is 50-60° C., and the time is 2-4 hours.
5. The shower gel with skin whitening and tendering effect according to claim 1, characterized in that: The preparation of the Terminalia sericea bark / root extract comprises the following steps: crushing the Terminalia sericea bark / root, placing the crushed Terminalia sericea bark / root in a supercritical CO2 extraction device, extracting the crushed Terminalia sericea bark / root at 40-50°C and 30-40 MPa for 40-60 minutes, and concentrating the extract under reduced pressure to obtain the Terminalia sericea bark / root extract.
6. The shower gel with skin whitening and tendering effect according to claim 1, characterized in that: The preparation of the Mediterranean cedar cone extract comprises: crushing fresh Mediterranean cedar cones, adding them to a phosphate buffer, ultrasonically treating them, then treating them at medium temperature and high pressure, centrifuging them, passing the supernatant through an ultrafiltration membrane with a molecular weight cut-off of less than 3000 Da, and drying them to obtain the Mediterranean cedar cone extract; The solid-liquid ratio of the Mediterranean cypress cones to the phosphate buffer is 1:8-10 g / mL; the concentration of the phosphate buffer is 0.1-0.2 mol / L, and the pH is 7.5-8.0; the ultrasonic treatment is carried out at 20-30 kHz and 40-50° C. for 40-50 min; and the medium-temperature and high-pressure treatment is carried out at 2-4 MPa and 80-90° C. for 6-10 min.
7. The shower gel with skin whitening and tendering effect according to claim 1, characterized in that: The preparation of the lemon bark leaf extract comprises: crushing the lemon bark leaf, adding it to deionized water, performing hot-pressing distillation extraction, and concentrating the extract under reduced pressure to obtain the lemon bark leaf extract; The material-liquid ratio of the lemon bark leaf to deionized water is 1:8-12 g / mL; the hot-pressed distillation extraction is performed at 0.2-0.3 MPa and a temperature of 100-110° C. for 40-50 minutes.
8. The method for preparing a shower gel with skin whitening and tendering effects according to claim 1, wherein: The specific preparation steps include: (1) adding a surfactant and a chelating agent into water, heating and stirring to obtain an aqueous phase; (2) adding a moisturizing agent and a thickener to lemongrass leaf oil, heating and stirring to obtain an oil phase; (3) Add the oil phase to the water phase, homogenize, cool to room temperature, add Elytium wilfordii root extract, Porphyra yezoensis extract, Terminalia sericea bark / root extract, Cupressus truncatus cone extract, and Lemon Balm leaf extract and continue stirring, then add pH adjuster and preservative, stir evenly to obtain the target shower gel.
9. The preparation method according to claim 8, wherein In step (1), the heating and stirring is carried out at 60-70° C. and 100-200 rpm for 40-60 min; in step (2), the heating and stirring is carried out at 70-80° C. and 250-350 rpm for 30-50 min.
10. The preparation method according to claim 8, characterized in that In step (3), the homogenization is carried out at 2000-3000 rpm for 5-10 minutes; and the stirring time is continued for 20-30 minutes.