Pickering emulsion containing prickle pomace powder, preparation method and application of prickle pomace powder

Abstract

The present invention belongs to the technical field of cosmetics and discloses a Pickering emulsion containing pomace powder, a preparation method, and applications of the pomace powder. The Pickering emulsion containing pomace powder comprises, by mass percentage, 5.0% to 50.0% oil; 0.1% to 5.0% pomace powder; and water to 100%. The pomace powder can also be used as a solid emulsifier to prepare cosmetics. The present invention uses pomace powder, which is widely available, easily accessible, and environmentally friendly, as an emulsifier, reducing the use of traditional emulsifiers and making the product milder. Due to its good interfacial activity, the pomace powder can be adsorbed at the oil-water interface to form an oil-in-water emulsion, especially for non-polar oils and polar oils with a polarity index between 20 mN / m and 30 mN / m. At the same time, because the pomace powder contains active ingredients such as flavonoids, the oil-in-water formulation system using the pomace powder as a solid emulsifier has good antioxidant properties and has very high potential application value in the cosmetics field.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and particularly relates to a Pickering emulsion containing thorny fruit pomace powder, a preparation method and application of the thorny fruit pomace powder. Background Art

[0002] Emulsions in skincare products are considered thermodynamically unstable due to their large oil-water interface, necessitating the addition of emulsifiers during formulation. Traditional emulsifiers, primarily surfactants, effectively stabilize the oil-water interface. However, when used in cosmetic emulsions, they often pose a potential risk to the skin, potentially leading to allergic reactions and other issues.

[0003] Compared to traditional surfactants, Pickering emulsion is an innovative emulsification system that uses solid particles to replace conventional surfactants. The use of solid particles as emulsifiers in cosmetics can not only effectively construct an oil-water interface, but also significantly reduce the risk of skin irritation caused by traditional surfactants. Currently, there are some inorganic particles on the market, such as titanium dioxide, zinc oxide and microcrystalline cellulose, which are used as solid emulsifiers in cosmetics. Compared with inorganic particles, solid particles derived from plants are more environmentally friendly, sustainable and safer. They also contain active ingredients with skin care effects, which can have a beneficial care effect on the skin.

[0004] Prinus principis is a deciduous shrub found primarily in the Himalayas at altitudes between 1,000 and 3,000 meters. This species is well-known for its ability to produce prinus principis oil, which is comparable in composition to Mediterranean olive oil and has antioxidant and soothing properties. It is often used to treat skin problems and is widely used in skin care products, particularly for sensitive skin. However, for a long time, the prinus principis principis residue produced after oil extraction has been treated as waste. Currently, there is little information on the application of prinus principis principis pomace powder in the cosmetics field on the market. Chinese patent CN117100651A reports its application in cosmetics, which can effectively replace mineral powders in traditional skin care products or cosmetics, but there are currently no reports on its use as an emulsifier in skin care products. Therefore, as a plant powder with a wide source and in line with the trend of green and sustainable development, prinus principis principis principis pomace powder has great development potential as a solid particle emulsifier in skin care products. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a Pickering emulsion containing Psoralea prickle powder, a preparation method and application of the Psoralea prickle powder.

[0006] In a first aspect, the present invention provides a Pickering emulsion containing Psoralea utilis pomace powder. The Pickering emulsion comprises the following components by mass percentage:

[0007] Oil, 5.0%~50.0%;

[0008] Psoralea corylifolia pomace powder, 0.1%~5.0%;

[0009] Water, replenish to 100%.

[0010] The Pickering emulsion is an oil-in-water Pickering emulsion, and the pomace powder of the pruning needles is used as a solid emulsifier to emulsify the oil.

[0011] Preferably, the particle size of the Psoralea utilis pomace powder is 10 to 40 microns, and the powder is micronized Psoralea utilis pomace powder.

[0012] Preferably, the mass percentage of the Psoralea corylifolia pomace powder is 0.5% to 3.0%.

[0013] Preferably, the oil is a polar oil with a polarity index between 20 mN / m and 30 mN / m and / or a non-polar oil.

[0014] More preferably, the polar oil with a polarity index between 20 mN / m and 30 mN / m is any one of cetearyl ethylhexanoate, ethylhexyl palmitate, isopropyl palmitate, isopropyl myristate, dimethicone, dipolysiloxane, isopropyl stearate, caprylic / capric triglyceride, isopropyl isostearate, or octyldodecanol, or any combination thereof. The oils and fats mentioned here are illustrative, including but not limited to the aforementioned examples, and may also include other polar oils and fats with a polarity index between 20 mN / m and 30 mN / m.

[0015] More preferably, the non-polar oil is squalane, mineral oil or C 12 -C 14 Any one of the isoparaffins, or any combination of several thereof. The oils and fats herein are for illustration only, including but not limited to the aforementioned examples, and may also include other non-polar oils and fats.

[0016] In the present invention, the polarity classification of oils and fats is based on (1) Qiu Bingyi, Gao Zhihong. Modern Cosmetic Science and Technology [M]. China Light Industry Press, 2016. Volume 1, pages 355-356; (2) "A short textbook of cosmetology", published on December 31, 1998, author KF de Polo, publisher Verlag fur Chemische Industrie H. Ziolkowsky KG, Germany. Pages 150-152. Among them, the polarity index of non-polar oils and fats is greater than 30 mN / m. In the present invention, non-polar oils and fats are referred to as Class I oils and fats; polar oils and fats with a polarity index between 20 mN / m and 30 mN / m are referred to as Class II oils and fats; PPG-15 stearyl alcohol ether is referred to as Class III oils and fats due to its larger polarity of 4.6 mN / m.

[0017] In a second aspect, the present invention provides a method for preparing a Pickering emulsion containing Psoralea utilis pomace powder, comprising the following steps:

[0018] Step S1, weighing the pruinosa pomace powder according to a predetermined ratio, adding it into water and mixing and stirring to obtain phase A;

[0019] Step S2, weighing oil according to a predetermined ratio as phase B;

[0020] Step S3: mixing phase A and phase B, and homogenizing them to obtain Pickering emulsion containing Psoralea utilis pomace powder (hereinafter referred to as Pickering emulsion).

[0021] The third aspect of the present invention provides the use of Psoralea corylifolia pomace powder in the preparation of cosmetics.

[0022] Preferably, the cosmetics are skin care product dosage forms such as skin care lotion, skin care cream, sunscreen, etc.

[0023] Preferably, the mass percentage of the Psoralea corylifolia pomace powder in the cosmetic is 1.0% to 3.0%, and the mass percentage of the internal phase is 10% to 40%.

[0024] Preferably, the skin care lotion comprises the following components by mass percentage:

[0025] Oil, 10.0%~40.0%;

[0026] Psoralea corylifolia pomace powder, 1.0%~3.0%;

[0027] Moisturizer, 2.0%~20.0%;

[0028] Thickener, 0.1%~0.7%;

[0029] p-Hydroxyacetophenone, 0.1%~0.5%;

[0030] Water, replenish to 100%.

[0031] Preferably, the skin cream comprises the following components by mass percentage:

[0032] Oil, 10.0%~40.0%;

[0033] Psoralea corylifolia pomace powder, 1.0%~3.0%;

[0034] Moisturizer, 2.0%~20.0%;

[0035] Thickener, 0.1%~0.7%;

[0036] p-Hydroxyacetophenone, 0.1%~0.5%;

[0037] Arginine, 0.1%~0.7%;

[0038] Water, replenish to 100%.

[0039] Compared with the prior art, the present invention has at least the following beneficial effects:

[0040] The Pickering emulsion containing Psoralea utilis pomace powder disclosed herein uses Psoralea utilis pomace powder as a solid emulsifier and can be prepared by simple homogenization, resulting in a simple process. The emulsion exhibits an emulsifying effect on various oil types, particularly polar and non-polar oils with a polarity index between 20 mN / m and 30 mN / m. The micronized Psoralea utilis pomace powder used as a solid emulsifier not only conforms to green, environmentally friendly, and sustainable trends, but also imparts excellent antioxidant properties to the emulsion.

[0041] The invention uses thorn pomace powder, which is widely available, easily obtainable, and environmentally friendly, as an emulsifier, thereby reducing the use of traditional emulsifiers and making the product milder. The thorn pomace powder can be adsorbed at the oil-water interface due to its good interfacial activity to form an oil-in-water emulsion, especially for non-polar oils and polar oils with a polarity index between 20 mN / m and 30 mN / m. At the same time, the thorn pomace powder contains active ingredients such as flavonoids. Therefore, the oil-in-water formulation system using the thorn pomace powder as a solid emulsifier has good antioxidant properties and has very high potential application value in the field of cosmetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 are microscopic photographs of the emulsions in Examples 1 to 10 of the present invention;

[0043] Figure 2 is a particle size distribution diagram of the original Psoralea utilis pomace powder and the micronized Psoralea utilis pomace powder in Test Example 2 of the present invention;

[0044] Figure 3 is an electron microscope photograph of the micronized Psoralea corylifolia pomace powder in Test Example 3 of the present invention;

[0045] Figure 4 is an interfacial tension diagram of different oil and water phases stabilized by micronized Psoralea corylifolia pomace powder in Test Example 4 of the present invention;

[0046] Figure 5 This is a fluorescence microscope photograph of the emulsion in Test Example 5 of the present invention;

[0047] Figure 6 This is a graph showing the DPPH radical scavenging rate in Test Example 6 of the present invention;

[0048] Figure 7 These are microscope photographs of the skin care lotions and creams in Application Examples 1 to 9 of the present invention.

[0049] Figure 8 This is a graph showing the DPPH radical scavenging rate in Test Example 8 of the present invention. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments. However, the following examples are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0051] Unless otherwise specified, the raw materials and materials used in the examples of the present invention were purchased through general commercial channels.

[0052] The sources of the raw materials, materials and instruments involved in the following examples / application examples or comparative examples are as follows:

[0053] The original unprocessed Psoralea corylifolia pomace powder has a particle size of 30 to 200 μm and is prepared by the same method as Preparation Example 1 of CN 117100651 A;

[0054] Micronized Psoralea corylifolia pomace powder, with a particle size of 10 to 40 μm, prepared by the same method as Example 4 of CN 117100651 A;

[0055] Mineral oil, CAS: 8042-47-5, trade name white oil, was purchased from China National Petroleum Corporation;

[0056] Squalane, CAS: 111-01-3, trade name Exolive, purchased from Caroi'line Company;

[0057] Caprylic / capric triglyceride, CAS: 65381-09-1, trade name TEGOSOFT C, purchased from Evonik;

[0058] Octyldodecanol, CAS: 5333-42-6, trade name TEGOSOFT G20, purchased from Evonik;

[0059] PPG-15 stearyl ether, CAS: 25231-21-4, trade name TEGOSOFT E, purchased from Evonik;

[0060] Ethylhexyl palmitate, CAS: 29806-73-3, trade name TEGOSOFT OP, purchased from Evonik;

[0061] Polydimethylsiloxane, CAS: 63148-62-9, trade name BELSIL DM 10, purchased from Wacker;

[0062] Xanthan gum, CAS: 11138-66-2, trade name GRINDSTED Xanthan 200, purchased from Danisco;

[0063] Carbomer, CAS: 9003-01-4, trade name Carbopol Ultrez 30, purchased from Lubrizol;

[0064] Glycerol, CAS: 56-81-5, trade name Moon K Glycerin, purchased from Procter & Gamble;

[0065] 1,2-Pentanediol, CAS: 5343-92-0, trade name Purolan PD-LO N, purchased from Lanxess;

[0066] p-Hydroxyacetophenone, CAS: 99-93-4, trade name SymSave H, purchased from Symrise;

[0067] Arginine, CAS: 74-79-3, trade name BINACTI AR, purchased from Zibon;

[0068] Congo red, CAS: 573-58-0, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0069] Nile Red, CAS: 7385-67-3, purchased from Sigma Aldrich;

[0070] Purified water was prepared in the laboratory using the Elix® Advantage (Merck) water purification system, with a resistivity greater than 15 MΩ.cm;

[0071] Ball mill, model TJX-410, was purchased from Tianjin Dongfang Tianjing Technology Development Co., Ltd.

[0072] Mixer, EUROSTAR 20 model, purchased from IKA, Germany;

[0073] Homogenizer (used in the examples), model T 25, purchased from IKA, Germany;

[0074] Homogenizer (used in the application examples), Primix MARK II Model 2.5, purchased from PRIMIX, Japan;

[0075] Weighing balance, model ME204E, purchased from Mettler, Switzerland;

[0076] Dynamic particle image analyzer, model QPi027, purchased from Sympatec, Germany;

[0077] Scanning electron microscope, FEIQ45 model, purchased from Thermo Fisher Scientific, USA;

[0078] Optical microscope, model DM2700 M, purchased from Leica Microsystems, Germany;

[0079] Drop shape analyzer, model DSA25, purchased from Krugman GmbH, Germany;

[0080] Fluorescence microscope, Axioscope 5, purchased from Zeiss, Germany;

[0081] The full-wavelength microplate reader, Multiskan Sky High, was purchased from Thermo Fisher Scientific, USA.

[0082] <Examples 1 to 10 and Comparative Example 1>

[0083] According to Table 1 below, the Pickering emulsions containing Psoralea utilis pomace powder of Examples 1 to 10 and the emulsion of Comparative Example 1 were prepared by the following preparation methods:

[0084] Step S1, weighing the Psoralea corylifolia pomace powder, adding it into purified water and stirring and mixing it, wherein the stirring rate is 500 rpm / min and the stirring time is 10 min;

[0085] Step S2, weighing oil as phase B;

[0086] Step S3: mixing phase A and phase B to obtain an oil-water mixture, and homogenizing the obtained oil-water mixture at a speed of 7000 r / min for 5 minutes to obtain a Pickering emulsion containing the pomace powder of the utilitarian fruit.

[0087] Table 1 Formula table of Examples 1 to 10 and Comparative Example 1

[0088]

[0089] <Application Examples 1~5>

[0090] Prepare skin care lotion, the formula is referred to Table 2. In Table 2, phase B is the internal phase, and the other phases are continuous phases.

[0091] The preparation method is as follows:

[0092] Step S1: weighing the micronized Psoralea utilis pomace powder, xanthan gum, and glycerin according to the formula in Table 2, adding them into purified water and stirring them (stirring speed 900 r / min) to obtain a uniform phase A, and heating them to 70° C. to 80° C.;

[0093] Step S2: Weigh different oils according to the formula in Table 2 to obtain phase B, and heat to 70°C-80°C;

[0094] Step S3, mixing phase A and phase B at 70° C. to obtain an oil-water mixture, and homogenizing the obtained oil-water mixture at a speed of 5000 r / min for 5 minutes to obtain a uniform emulsion;

[0095] Step S4, stirring the emulsion at a speed of 50 r / min and cooling it to 40° C., adding phase C, and continuing stirring and cooling it to room temperature to obtain the Pickering skin care lotion containing pomace powder of the black thorn.

[0096] Table 2 Formulations for Application Examples 1 to 5

[0097]

[0098] In Table 2, the oils are Class II oils (ethylhexyl palmitate, caprylic / capric triglyceride, and dimethicone) and Class I oils (squalane), the moisturizers are glycerin and 1,2-pentanediol, and the thickener is xanthan gum.

[0099] <Application Examples 6-9 and Comparative Example 2>

[0100] Prepare skin cream, the formula of which is shown in Table 3. In Table 3, phase B is the inner phase and the other phases are continuous phases.

[0101] The preparation method is as follows:

[0102] Step S1, weighing the micronized Psoralea utilis pomace powder, carbomer, and glycerin according to the formula described in Table 3, adding them into purified water and stirring them (stirring speed 900 r / min) to obtain a uniform phase A, and heating them to 70° C. to 80° C.;

[0103] Step S2: Weigh different oils according to the formula in Table 3 to obtain phase B, and heat to 70°C-80°C;

[0104] Step S3, mixing phase A and phase B at 70° C. to obtain an oil-water mixture, and homogenizing the obtained oil-water mixture at a speed of 6000 r / min for 5 minutes to obtain a uniform emulsified sample;

[0105] Step S4, stirring the emulsified sample at a speed of 50 r / min and cooling it to 40° C., adding phase C and phase D in sequence, and continuing stirring and cooling to room temperature to obtain Pickering skin care cream containing pomace powder of Psoralea corylifolia.

[0106] Table 3 Formulations of Application Examples 6-9 and Comparative Example 2

[0107]

[0108] In Table 3, the oils are Class II oils (ethylhexyl palmitate, caprylic / capric triglyceride) and Class I oils (squalane), the moisturizers are glycerol and 1,2-pentanediol, the thickener is carbomer, and arginine is the pH adjuster.

[0109] <Test Example 1>

[0110] This test example conducts emulsion microstructure testing.

[0111] A small amount of emulsion was placed on a microscope slide and covered with a cover glass. The samples were observed using an optical microscope. All samples were observed at room temperature and representative images were taken. The results are shown in Table 4 and Figure 1 .in Figure 1 In the examples, a is Example 1, b is Example 2, c is Example 3, d is Example 4, e is Example 5, f is Example 6, g is Example 7, h is Example 8, i is Example 9, and j is Example 10.

[0112] Table 4 Emulsification status

[0113]

[0114] Combined with the emulsification situation in Table 4 and Figure 1 From the microscopic results of Examples 1-6 and Comparative Example 1, it can be seen that 1.0% of the micronized Psoralea corylifolia pomace powder ( Figure 1 a~ Figure 1 f) Emulsification was effective for both Class I oils (mineral oil, squalane) and Class II oils (caprylic / capric triglyceride, octyldodecanol) within a mass content range of 5.0-50.0%. The mineral oil and squalane emulsified particles were finer and more uniform. In contrast, in Comparative Example 1, using the more polar Class III oil PPG-15 stearyl ether, emulsification was poor, with the oil remaining separated into separate layers. Emulsified particles could not be observed under a microscope, and therefore the microscopic image is not shown.

[0115] In addition, from Examples 7 to 10, it can be seen that for oil squalane (50.0%), different contents (0.5%-3.0%) of micronized squalane powder can be observed to have obvious emulsified particles ( Figure 1 g~ Figure 1 j), good emulsification effect.

[0116] <Test Example 2>

[0117] This test example tests the particle size of the pomace powder of the thorny tree.

[0118] The particle size of the original untreated and micronized pomace powder of P. utilis was measured using a QPi027 instrument from Sympatec GmbH, Germany. All powders tested were measured using an M5 range, a 0.5 mm flow cell, a powder optical density of 0.11%, a 60-second test time, and EQPC data processing. The results are shown in Table 1. Figure 2 It can be seen that the particle size of the micronized Psoralea corylifolia pomace powder becomes significantly smaller and more uniform. After micronization, the particle size of the Psoralea corylifolia pomace powder is mainly concentrated between 10 and 40 microns.

[0119] <Test Example 3>

[0120] This test example observes the morphology of the micronized Psoralea corylifolia pomace powder.

[0121] The micronized purpurogenous pomace powder sample was first sprayed with platinum, dried for 10 minutes and then placed in an electron microscope with an observation distance of 5 mm, an operating voltage of 5 kV, and a magnification of 1000 times for observation. Figure 3 .from Figure 3 It can be seen that the particle size and Figure 2 The data correspond to the particle size concentration between 10-40 microns. Figure 3 It can be seen that the powder has agglomeration under the electron microscope. This is because the purpurogenous pomace powder is a by-product of squeezing purpurogenous fruit oil, and there is still oil residue. Therefore, under the electron microscope, the micronized purpurogenous pomace powder still has agglomeration.

[0122] <Test Example 4>

[0123] This test example performs an interfacial tension test.

[0124] The interfacial tension was measured using a drop shape analyzer (DSA25) with a hanging drop module. Different oils were added to the sample pool, and a drop of micronized prickly pear pomace powder dispersion diluted with purified water (1.0wt%) was suspended on the needle of the injection device and injected into a glass dish containing the oil phase. The temperature was controlled at 25±0.5℃ for 1800 seconds. The changes in the droplet radius and shape were recorded, and the interfacial tension changes were calculated using the software Advance. The needle diameter and the density of the oil-water phase were taken into account in the calculation. The initial interfacial tension is the interfacial tension at the moment the dispersion just contacts the oil phase, and the final interfacial tension is the interfacial tension at the adsorption equilibrium of the micronized prickly pear pomace powder at the oil-water interface after the dispersion enters the oil phase. The results are shown in Figure 4 .

[0125] Initial interfacial tension is related to the polarity of the oil. The lower the polarity of the oil, the greater the interfacial tension with the water phase. As the micronized purpurogenous pomace powder gradually adsorbs on the oil-water interface, the interfacial tension begins to decrease and reaches equilibrium. The difference between the initial and final interfacial tensions is related to the emulsification ability of the micronized purpurogenous pomace powder for different oils. Figure 4 It can be seen that the interfacial tension of mineral oil, squalane and caprylic / capric triglyceride is reduced most significantly, while the interfacial tension of PPG-15 stearyl ether is reduced the least, which is consistent with the final emulsification effect.

[0126] <Test Example 5>

[0127] This test example uses a microscope to observe the emulsion fluorescence.

[0128] To observe the arrangement of the pomace powder at the oil-water interface and its distribution in the continuous phase, fluorescence observation was performed on an emulsion (Example 8) containing 3% micronized pomace powder as a solid emulsifier and squalane as the oil phase. The experimental process is as follows:

[0129] According to the formulation of Example 8, Nile red was added to the oil phase squalane and stirred to uniformly dye. The micronized purpureus pomace powder was dispersed in water, Congo red was added and stirred to uniformly dye. The emulsion was then prepared according to the preparation method of Example 8 and used for later use. The emulsion samples were observed and photographed using a fluorescence microscope (Zeiss Axiscope 5). Under the fluorescence microscope, Nile red (excitation wavelength: 450-500 nm, emission wavelength: >528 nm) appeared green; Congo red (excitation wavelength: 552 nm, emission wavelength: 636 nm) appeared red. Figure 5 As shown, Figure 5 The interior of the emulsified particles in a is green, which is squalane stained with Nile red, indicating that the emulsion is an oil-in-water emulsion; Figure 5In b, the emulsified particle interface and the particles in the continuous phase are red, which is the micronized pomace powder stained with Congo red, indicating that the micronized pomace powder is adsorbed at the oil-water interface and plays the role of a solid emulsifier, and the large amount of micronized pomace powder in the continuous phase also helps stabilize the system, which is consistent with the mechanical barrier theory and three-dimensional viscoelastic particle network mechanism of the Pickering emulsion system stability.

[0130] <Test Example 6>

[0131] This test example conducts a DPPH free radical scavenging rate test.

[0132] The DPPH free radical scavenging test was used to test the antioxidant properties of the Pickering emulsion formulation containing only water, squalane, and micronized P. prickle pomace powder.

[0133] In the experiment, DPPH powder was weighed and dissolved in ethanol (0.1 mg / mL) to obtain an ethanol solution, which was used as a control to measure Ai. All emulsions (Example 2 and Examples 7 to 10) were diluted 10 times with purified water for subsequent testing. The diluted emulsion was mixed with ethanol as a blank control to measure A0; at the same time, the diluted emulsion was mixed with the DPPH ethanol solution and stored in a dim environment (25±0.5°C) for 30 minutes. The absorbance at a wavelength of 517 nm was measured by an enzyme reader (Multiskan Sky High). A j To determine the inhibition or scavenging ability of the sample. Using the same method, the above five emulsions were tested respectively. The test results are shown in Figure 6 .

[0134] The lower the absorbance, the stronger the inhibition or scavenging ability. The DPPH scavenging activity was calculated using formula 1:

[0135] Clearance rate = (A i -( A j -A0)) / A i * 100% (1)

[0136] Where Ai represents the absorbance of the control group without sample, A0 represents the absorbance of the negative blank control group without DPPH, and Aj represents the absorbance of the solution containing sample.

[0137] In Examples 2 and 7-10, the effects of different contents of micronized purpurogenous pomace powder on the formulation, especially the effect on DPPH radical scavenging rate, were investigated. In Examples 2 and 7-10, the contents of micronized purpurogenous pomace powder were 1.0%, 0.5%, 1.5%, 2.0%, and 3.0%, respectively. Figure 6The results show that Example 7, containing 0.5% micronized P. prisma powder, has the lowest DPPH radical scavenging rate (68.05%), while Example 10, containing 3.0% micronized P. prisma powder, has the highest DPPH radical scavenging rate (91.71%). This demonstrates that the addition of P. prisma powder to the system imparts excellent antioxidant properties to the oil-in-water Pickering emulsion; as the content of micronized P. prisma powder in the example formulations increases, the DPPH radical scavenging rate gradually increases.

[0138] <Test Example 7>

[0139] This test case performs microstructure testing on the skin care lotion and skin care cream in the corresponding use case.

[0140] Place a small amount of skin care lotion or cream on a microscope slide and cover it with a cover slip. Observe the sample using an optical microscope. All samples were observed at room temperature and representative images were taken. Figure 7 .in Figure 7 A to E correspond to application examples 1 to 5, and F to I correspond to application examples 6 to 9.

[0141] Combine Figure 7 From the microscopic results of Application Examples 1-5, it can be seen that 1.0% of the micronized pomace powder ( Figure 7 A~ Figure 7 D) and 3.0% micronized pomace powder ( Figure 7 E) It has a good emulsifying effect on Class I oils (squalane) and Class II oils (ethylhexyl palmitate, caprylic / capric triglyceride, polydimethylsiloxane) with a mass content within the range of 10.0~40.0%. Among them, the emulsified particles of the skin care lotion with 10.0% squalane are the finest and most uniform.

[0142] Combine Figure 7 From the microscopic results of Application Examples 6-9, it can be seen that 1.0% of the micronized Psoralea corylifolia pomace powder ( Figure 7 F~ Figure 7 H) and 3.0% micronized pomace powder ( Figure 7 I) Excellent emulsification of both Class I oils (squalane) and Class II oils (ethylhexyl palmitate and caprylic / capric triglyceride) within a mass content range of 10.0-40.0% was achieved, with distinct emulsified particles observed. Comparative Example 2 lacked an emulsifier, and therefore, no emulsified particles could be observed under a microscope. Therefore, the microscopic image is not shown.

[0143] <Test Example 8>

[0144] This test example conducts a DPPH free radical scavenging rate test.

[0145] The DPPH free radical scavenging rate experiment was used to test the antioxidant performance of the formula of Application Example 6 and Comparative Example 2, wherein the Application Example and Comparative Example were diluted 80 times respectively, and the other experimental conditions and methods were the same as those of Test Example 6. Figure 8 .

[0146] Application Example 6 and Comparative Example 2 investigated the effect of 1.0% micronized pomace powder on the same formula, especially the effect on DPPH radical scavenging rate. As shown in Table 3, except for the addition of 1.0% micronized pomace powder to the formula of Application Example 6, the types and contents of the other ingredients are the same as those in Comparative Example 2. Figure 8 It can be seen that the DPPH radical scavenging rate of Application Example 6 (58.69%) is much higher than that of Comparative Example 2 (19.93%). This shows that the addition of Psoralea utilis pomace powder to the formula system brings good antioxidant properties to the Pickering oil-in-water skin cream.

[0147] In summary, as a natural plant powder, the pomace powder of the thorny tree is added to the cosmetic formula. In addition to acting as a solid emulsifier, it also brings excellent antioxidant properties to the formula and has good application prospects in the cosmetic field.

[0148] The applicant declares that the above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the scope of protection and disclosure of the present invention.

Claims

1. A Pickering emulsion containing Psoralea utilis pomace powder, characterized in that: Calculated by mass percentage, it includes the following components: Oil, 5.0%~50.0%; Psoralea corylifolia pomace powder, 0.5%~3.0%; Water, replenish to 100%; The Pickering emulsion is used in skin care products; The purpurogenous fruit pomace powder is used as a solid emulsifier to emulsify the oil, and the oil is a non-polar oil and / or a polar oil with a polarity index between 20 mN / m and 30 mN / m. The polar oil with a polarity index between 20 mN / m and 30 mN / m is any one or more of cetearyl ethylhexanoate, ethylhexyl palmitate, isopropyl palmitate, isopropyl myristate, polydimethylsiloxane, isopropyl stearate, caprylic / capric triglyceride or octyldodecanol; the non-polar oil is squalane, mineral oil or C 12 -C 14 Any one or more of isoparaffins; The Pickering emulsion has antioxidant properties.

2. The Pickering emulsion containing Psoralea utilis pomace powder according to claim 1, wherein The particle size of the thorn fruit pomace powder is 10 to 40 microns.

3. A method for preparing the Pickering emulsion containing Psoralea utilis pomace powder according to claim 1 or 2, characterized in that: The following steps are involved: Step S1, weighing the pruinosa pomace powder according to a predetermined ratio, adding it into water and mixing and stirring to obtain phase A; Step S2, weighing oil according to a predetermined ratio as phase B; Step S3: mixing the phase A and the phase B, and performing homogenization treatment to obtain a Pickering emulsion containing the pomace powder of the utilitarian fruit.

4. A use of Psoralea corylifolia pomace powder as a solid emulsifier in the preparation of cosmetics, characterized in that: The prune thorn pomace powder is the prune thorn pomace powder according to claim 1.

5. Use of the purpurogenous pomace powder as claimed in claim 4 as a solid emulsifier in the preparation of cosmetics, characterized in that: The mass percentage of the pomace powder of the blackthorn thorn in cosmetics is 1.0% to 3.0%, and the mass percentage of the internal phase is 10% to 40%.

6. Use of the purpurogenous pomace powder as claimed in claim 4 as a solid emulsifier in the preparation of cosmetics, characterized in that: The cosmetic is a skin care lotion, which comprises the following components by mass percentage: Oil, 10.0%~40.0%; Psoralea corylifolia pomace powder, 1.0%~3.0%; Moisturizer, 2.0%~20.0%; Thickener, 0.1%~0.7%; p-Hydroxyacetophenone, 0.1%~0.5%; Water, replenish to 100%; Wherein, the oil is a non-polar oil and / or a polar oil with a polarity index between 20 mN / m and 30 mN / m. The polar oil with a polarity index between 20 mN / m and 30 mN / m is any one or more of cetearyl ethylhexanoate, ethylhexyl palmitate, isopropyl palmitate, isopropyl myristate, polydimethylsiloxane, isopropyl stearate, caprylic / capric triglyceride or octyldodecanol; the non-polar oil is squalane, mineral oil or C 12 -C 14 Any one or more of the isoparaffins.

7. Use of the purpurogenous pomace powder as claimed in claim 4 as a solid emulsifier in the preparation of cosmetics, characterized in that: The cosmetic is a skin care cream, which comprises the following components by mass percentage: Oil, 10.0%~40.0%; Psoralea corylifolia pomace powder, 1.0%~3.0%; Moisturizer, 2.0%~20.0%; Thickener, 0.1%~0.7%; p-Hydroxyacetophenone, 0.1%~0.5%; Arginine, 0.1%~0.7%; Water, replenish to 100%; Wherein, the oil is a non-polar oil and / or a polar oil with a polarity index between 20 mN / m and 30 mN / m. The polar oil with a polarity index between 20 mN / m and 30 mN / m is any one or more of cetearyl ethylhexanoate, ethylhexyl palmitate, isopropyl palmitate, isopropyl myristate, polydimethylsiloxane, isopropyl stearate, caprylic / capric triglyceride or octyldodecanol; the non-polar oil is squalane, mineral oil or C 12 -C 14 Any one or more of the isoparaffins.

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