Pickering emulsion containing prinsepia utilis royle pomace powder, preparation method and application of prinsepia utilis royle pomace powder

Abstract

The invention belongs to the technical field of cosmetics, and discloses Pickering emulsion containing prinsepia utilis royle pomace powder, a preparation method and application of the prinsepia utilis royle pomace powder. The Pickering emulsion containing prinsepia utilis royle pomace powder comprises the following components in percentage by mass: 5.0%-50.0% of grease; 0.1%-5.0% of prinsepia utilis royle residue powder; the total percentage is 100%. The prinsepia utilis royle pomace powder as a solid emulsifier can also be used for preparing cosmetics. The prinsepia utilis royle pomace powder which is wide in source, easy to obtain and environmentally friendly is used as the emulsifier, use of a traditional emulsifier is reduced, and the product is milder; the prinsepia utilis royle pomace powder can be adsorbed on an oil-water interface due to good interfacial activity of the prinsepia utilis royle pomace powder to form an oil-in-water emulsion, especially for non-polar grease and polar grease with the polarity index of 20-30 mN / m; meanwhile, because the prinsepia utilis royle pomace powder contains active ingredients such as flavone, an oil-in-water formula system taking the prinsepia utilis royle pomace powder as a solid emulsifier has good oxidation resistance and has very high potential application value in the field of cosmetics.

Description

Technical Field

[0001] The present invention belongs to the technical field of cosmetics, and particularly relates to a Pickering emulsion containing pricklyash residue powder, a preparation method thereof, and the application of the pricklyash residue powder. Background Art

[0002] Emulsions in skin care products are regarded as a thermodynamically unstable system due to their large oil-water interface area. Therefore, emulsifiers are often added during the formulation process. Traditional emulsifiers are mainly surfactants. Although they can effectively stabilize the oil-water interface, when used in cosmetic emulsions, they often bring certain potential burdens to the skin, thereby causing problems such as allergic reactions.

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

[0004] Pricklyash is a deciduous shrub mainly found in the Himalayas at an altitude of 1000 - 3000 meters. This species is well-known for its ability to produce pricklyash oil, which is comparable to Mediterranean olive oil in its composition and has antioxidant, soothing, and other effects. It is often used to treat skin problems and is widely used in skin care products, especially in the field of sensitive skin care. However, for a long time, the pricklyash residue produced after oil extraction has been treated as waste. Currently, there is little information on the application of pricklyash residue powder in the cosmetics field. Chinese Patent CN117100651A reports its application in color cosmetics, which can effectively replace mineral powders in traditional skin care products or cosmetics. However, there is no report on its application 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, pricklyash residue powder has great potential for development as a solid particle emulsifier in skin care products. Summary of the Invention

[0005] In view of the above technical problems, the present invention provides a Pickering emulsion containing pricklyash residue powder, a preparation method thereof, and the application of the pricklyash residue powder.

[0006] In the first aspect of the present invention, a Pickering emulsion containing pricklyash residue powder is provided. The Pickering emulsion, by mass percentage, comprises the following components: Oil, 5.0% - 50.0%; Prinsepia utilis residue powder, 0.1% - 5.0%; Water, up to 100%.

[0007] The above Pickering emulsion is an oil-in-water Pickering emulsion, and Prinsepia utilis residue powder is used as a solid emulsifier to emulsify the oil.

[0008] Preferably, the particle size of Prinsepia utilis residue powder is 10 - 40 microns, which is micronized Prinsepia utilis residue powder.

[0009] Preferably, the mass percentage of Prinsepia utilis residue powder is 0.5% - 3.0%.

[0010] Preferably, the oil is a polar oil or / and a non-polar oil with a polarity index between 20 mN / m and 30 mN / m.

[0011] 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, polydimethylsiloxane, dimethicone, isopropyl stearate, triglyceride caprylic / capric acid, isopropyl isostearate or octyldodecanol, or a combination of any several. The oils here are for illustrative purposes, including but not limited to the foregoing examples, and may also include other polar oils with a polarity index between 20 mN / m and 30 mN / m.

[0012] More preferably, the non-polar oil is any one of squalane, mineral oil or C 12 -C 14 isoparaffin, or a combination of any several. The oils here are for illustrative purposes, including but not limited to the foregoing examples, and may also include other non-polar oils.

[0013] In the present invention, the polarity classification of the oil refers to (1) Qiu Bingyi, Gao Zhihong. Modern Cosmetics Science and Technology [M]. China Light Industry Press, 2016. Pages 355 - 356 of the upper volume; (2) "A short textbook of cosmetology", published on December 31, 1998, author K.F. de Polo, publisher Verlag fur Chemische Industrie H.Ziolkowsky KG, Germany. Pages 150 - 152. Among them, the polarity index of non-polar oils is greater than 30 mN / m. In the present invention, non-polar oils are referred to as type I oils; polar oils with a polarity index between 20 mN / m and 30 mN / m are referred to as type II oils; PPG-15 stearyl ether has a relatively large polarity, 4.6 mN / m, and is referred to as type III oil.

[0014] In the second aspect of the present invention, a method for preparing a Pickering emulsion containing pricklyash peel residue powder is provided, comprising the following steps: Step S1, weighing pricklyash peel residue powder according to a predetermined ratio, adding it to water and mixing and stirring to obtain phase A; Step S2, weighing oil and fat as phase B according to a predetermined ratio; Step S3, mixing phase A and phase B and performing homogenization treatment to obtain a Pickering emulsion containing pricklyash peel residue powder (hereinafter referred to as Pickering emulsion).

[0015] In the third aspect of the present invention, the application of pricklyash peel residue powder in the preparation of cosmetics is provided.

[0016] Preferably, the cosmetics are skin care lotion, skin care cream, sunscreen and other skin care product dosage forms.

[0017] Preferably, the mass percentage of pricklyash peel residue powder in the cosmetics is 1.0% - 3.0%, and the mass percentage of the internal phase is 10% - 40%.

[0018] Preferably, by mass percentage, the skin care lotion comprises the following components: Oil and fat, 10.0% - 40.0%; Pricklyash peel residue powder, 1.0% - 3.0%; Humectant, 2.0% - 20.0%; Thickener, 0.1% - 0.7%; p-Hydroxyacetophenone, 0.1% - 0.5%; Water, make up to 100%.

[0019] Preferably, by mass percentage, the skin care cream comprises the following components: Oil and fat, 10.0% - 40.0%; Pricklyash peel residue powder, 1.0% - 3.0%; Humectant, 2.0% - 20.0%; Thickener, 0.1% - 0.7%; p-Hydroxyacetophenone, 0.1% - 0.5%; Arginine, 0.1% - 0.7%; Water, make up to 100%.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects: The Pickering emulsion containing pricklyash fruit pomace powder disclosed in the present invention uses pricklyash fruit pomace powder as a solid emulsifier and can be prepared only by ordinary homogenization, with a simple process. Moreover, it has an emulsifying effect on different types of oils, especially polar oils and non-polar oils with a polar index between 20 mN / m and 30 mN / m; the micronized pricklyash fruit pomace powder as a solid emulsifier not only conforms to the trend of green environmental protection and sustainability, but also endows the emulsion with good antioxidant properties.

[0021] The present invention uses pricklyash fruit pomace powder, which is widely sourced, easily obtainable and environmentally friendly, as an emulsifier, reducing the use of traditional emulsifiers and making the product milder; due to its good interfacial activity, pricklyash fruit pomace powder can be adsorbed on the oil-water interface to form an oil-in-water emulsion, especially for non-polar oils and polar oils with a polar index between 20 mN / m and 30 mN / m; at the same time, since pricklyash fruit pomace powder itself contains active ingredients such as flavonoids, the oil-in-water formulation system with pricklyash fruit pomace powder as a solid emulsifier has good antioxidant properties and has very high potential application value in the cosmetic field. Brief Description of the Drawings

[0022] Figure 1 are microscope photos of the emulsions in Examples 1 to 10 of the present invention; Figure 2 are particle size distribution diagrams of the original pricklyash fruit pomace powder and micronized pricklyash fruit pomace powder in Test Example 2 of the present invention; Figure 3 are electron microscope photos of the micronized pricklyash fruit pomace powder in Test Example 3 of the present invention; Figure 4 are interfacial tension diagrams of different oils and aqueous phases stabilized by the micronized pricklyash fruit pomace powder in Test Example 4 of the present invention; Figure 5 are fluorescence microscope photos of the emulsions in Test Example 5 of the present invention; Figure 6 are DPPH radical scavenging rate diagrams in Test Example 6 of the present invention; Figure 7 are microscope photos of the skin care lotions and skin care creams in Application Examples 1 to 9 of the present invention.

[0023] Figure 8 are DPPH radical scavenging rate diagrams in Test Example 8 of the present invention. Detailed Description of the Invention

[0024] The technical solutions of the present invention will be further described below in conjunction with the drawings and through specific embodiments. However, the following examples are only simple examples of the present invention and do not represent or limit the scope of the protection of the present invention. The scope of protection of the present invention is subject to the claims.

[0025] Unless otherwise specified, the raw materials and materials used in the embodiments of the present invention are purchased through general commercial channels.

[0026] The source information of the relevant raw materials, materials and instruments involved in the following examples / application examples or comparative examples is as follows: Raw untreated pricklyash fruit residue powder with a particle size between 30 and 200 microns, prepared in the same manner as Preparation Example 1 of CN 117100651 A; Micronized pricklyash fruit residue powder with a particle size between 10 and 40 microns, prepared in the same manner as Example 4 of CN 117100651 A; Mineral oil, CAS: 8042-47-5, trade name white oil, purchased from PetroChina Company Limited; Squalane, CAS: 111-01-3, trade name Exolive, purchased from Caroi'line Company; Caprylic / capric triglyceride, CAS: 65381-09-1, trade name TEGOSOFT C, purchased from Evonik Company; Octyldodecanol, CAS: 5333-42-6, trade name TEGOSOFT G20, purchased from Evonik Company; PPG-15 stearyl ether, CAS: 25231-21-4, trade name TEGOSOFT E, purchased from Evonik Company; Ethylhexyl palmitate, CAS: 29806-73-3, trade name TEGOSOFT OP, purchased from Evonik Company; Polydimethylsiloxane, CAS: 63148-62-9, trade name BELSIL DM 10, purchased from Wacker Company; Xanthan gum, CAS: 11138-66-2, trade name GRINDSTED Xanthan 200, purchased from Danisco Company; Carbomer, CAS: 9003-01-4, trade name Carbopol Ultrez 30, purchased from lubrizol Company; Glycerin, CAS: 56-81-5, trade name Moon K Glycerin, purchased from P&G Company; 1,2-Pentanediol, CAS: 5343-92-0, trade name Purolan PD-LO N, purchased from Lanxess Company; p-Hydroxyacetophenone, CAS: 99-93-4, trade name SymSave H, purchased from Symrise Company; Arginine, CAS: 74-79-3, trade name BINACTI AR, purchased from Zibon; Congo red, CAS: 573-58-0, purchased from Sinopharm Chemical Reagent Co., Ltd.; Nile red, CAS: 7385-67-3, purchased from Sigma Aldrich; Purified water was prepared in the laboratory using an Elix® Advantage (Merck) water purification system, with a resistivity greater than 15 MΩ.cm; Ball mill, model TJX-410, purchased from Tianjin Dongfang Tianjing Technology Development Co., Ltd.; Stirrer, model EUROSTAR 20, purchased from IKA Germany; Homogenizer (used in the examples), model T 25, purchased from IKA Germany; Homogenizer (used in the application examples), Primix MARK II Model 2.5, purchased from PRIMIX Japan; Weighing balance, model ME204E, purchased from Mettler Toledo Switzerland; Dynamic particle image analyzer, model QPi027, purchased from Sympatec Germany; Scanning electron microscope, model FEIQ45, purchased from Thermo Fisher Scientific USA; Optical microscope, model DM2700 M, purchased from Leica Germany; Drop shape analyzer, model DSA25, purchased from Krüss Germany; Fluorescence microscope, model Axioscope 5, purchased from Carl Zeiss Germany; Full wavelength microplate reader, Multiskan Sky High, purchased from Thermo Fisher Scientific USA.

[0027] <Examples 1 - 10 and Comparative Example 1> According to Table 1 below, Pickering emulsions containing Prinsepia utilis Royle pomace powder in Examples 1 - 10 and the emulsion of Comparative Example 1 were prepared. The preparation method is as follows: Step S1: Weigh Prinsepia utilis Royle pomace powder and add it to purified water for stirring and mixing to obtain Phase A, with a stirring rate of 500 rpm / min and a stirring time of 10 min; Step S2: Weigh the oil as Phase B; Step S3: Mix Phase A and Phase B to obtain an oil - water mixture, and homogenize the obtained oil - water mixture at a speed of 7000 r / min for 5 min to obtain a Pickering emulsion containing Prinsepia utilis Royle pomace powder.

[0028] Table 1 Formulation table of Examples 1 - 10 and Comparative Example 1

[0029] <Application Examples 1 - 5> Prepare a skin care lotion, and the formula refers to Table 2. In Table 2, Phase B is the internal phase, and the other phases are the continuous phases.

[0030] The preparation method is as follows: Step S1, weigh the micronized Prinsepia utilis Royle fruit residue powder, xanthan gum, and glycerol of the present invention according to the formula described in Table 2, add them to purified water and perform stirring treatment (stirring speed: 900 r / min) to obtain a uniform Phase A, and heat it to 70°C - 80°C; Step S2, weigh different oils and fats respectively according to the formula described in Table 2 to obtain Phase B, and heat it to 70°C - 80°C; Step S3, mix Phase A and Phase B at 70°C - 80°C to obtain an oil - water mixture, and homogenize the obtained oil - water mixture at a speed of 5000 r / min for 5 min to obtain a uniform emulsion; Step S4, stir and cool the above - mentioned emulsion at a speed of 50 r / min, cool it to 40°C, add Phase C, and continuously stir and cool to room temperature to obtain a Pickering skin care lotion containing Prinsepia utilis Royle fruit residue powder.

[0031] Table 2 Formula Table of Application Examples 1 - 5

[0032] In Table 2, the oils and fats are Class II oils and fats (ethylhexyl palmitate, triglyceride of caprylic / capric acid, polydimethylsiloxane) and Class I oil and fat (squalane), the moisturizers are glycerol and 1,2 - pentanediol, and the thickener is xanthan gum.

[0033] <Application Examples 6 - 9 and Comparative Example 2> Prepare a skin care cream, and the formula refers to Table 3. In Table 3, Phase B is the internal phase, and the other phases are the continuous phases.

[0034] The preparation method is as follows: Step S1, weigh the micronized Prinsepia utilis Royle fruit residue powder, carbomer, and glycerol of the present invention according to the formula described in Table 3, add them to purified water and perform stirring treatment (stirring speed: 900 r / min) to obtain a uniform Phase A, and heat it to 70°C - 80°C; Step S2, weigh different oils and fats respectively according to the formula described in Table 3 to obtain Phase B, and heat it to 70°C - 80°C; Step S3, mix Phase A and Phase B at 70°C - 80°C to obtain an oil - water mixture, and homogenize the obtained oil - water mixture at a speed of 6000 r / min for 5 min to obtain a uniform emulsified sample; Step S4: Stir and cool the above emulsified sample at a speed of 50 r / min until the temperature drops to 40 °C, then add Phase C and Phase D in sequence, and continue to stir and cool to room temperature to obtain the Pickering skin care cream containing the powder of Prinsepia utilis Royle residue.

[0035] Table 3 Formulation Tables of Application Examples 6 - 9 and Comparative Example 2

[0036] In Table 3, the oils and fats are Class II oils and fats (ethylhexyl palmitate, triglyceride of caprylic / capric acid) and Class I oils and fats (squalane), the moisturizers are glycerol and 1,2 - pentanediol, the thickener is carbomer, and arginine is the pH regulator.

[0037] <Test Example 1> In this test example, the microstructure of the emulsion was tested.

[0038] Put a small amount of the emulsion on a microscope slide and gently cover it with a coverslip. Observe the sample using an optical microscope. All samples were observed at room temperature, and representative pictures were taken. The results are shown in Table 4 below and Figure 1 . Among them Figure 1 , 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.

[0039] Table 4 Emulsification Situation Table

[0040] Combined with the emulsification situation in Table 4 and Figure 1 the microscope results, it can be seen from Examples 1 - 6 and Comparative Example 1 that 1.0% of the micronized powder of Prinsepia utilis Royle residue ( Figure 1 a~ Figure 1 f) has an emulsifying effect on Class I oils and fats (mineral oil, squalane) and Class II oils and fats (triglyceride of caprylic / capric acid, octyldodecanol) within the range of 5.0 - 50.0% in mass content. Among them, the emulsified particles of mineral oil and squalane are finer and more uniform. On the contrary, in Comparative Example 1, the Class III oil and fat PPG - 15 stearyl ether with a higher polarity was used. Due to poor emulsification, the oil and fat still exist in a layered state in the system, and emulsified particles could not be observed under the microscope, so its microscope picture is not shown.

[0041] In addition, it can be seen from Examples 7 - 10 that for the oil and fat squalane (50.0%), obvious emulsified particles ( Figure 1 g~ Figure 1 j) can be observed for micronized powder of Prinsepia utilis Royle residue with different contents (0.5% - 3.0%), and the emulsifying effect is good.

[0042] <Test Example 2> This test example conducts particle size testing on the powder of Prinsepia utilis Royle residue powder.

[0043] The particle sizes of the original untreated Prinsepia utilis Royle residue powder and micronized Prinsepia utilis Royle residue powder were measured using the QPi027 device from Sympatec GmbH, Germany. The test range for all test powders was M5, the flow cell size was 0.5 mm, the powder optical concentration was 0.11%, the test time was 60 s, and the data processing mode was EQPC. The results are shown in Figure 2 , it can be seen that the particle size of the micronized Prinsepia utilis Royle residue powder becomes significantly smaller and more uniform, and the particle size of the micronized Prinsepia utilis Royle residue powder mainly concentrates between 10 and 40 microns.

[0044] <Test Example 3> This test example observes the morphology of the micronized Prinsepia utilis Royle residue powder.

[0045] The micronized Prinsepia utilis Royle residue powder sample was first sputter-coated with platinum, dried for 10 minutes, and then placed in the electron microscope. The observation distance was 5 mm, the working voltage was 5 kv, and the magnification was 1000 times for observation. The results are shown in Figure 3 . From Figure 3 it can be seen that the particle size corresponds to the Figure 2 data, and the particle size concentrates between 10 - 40 microns. In addition, from Figure 3 it can be seen that there is a phenomenon of powder agglomeration under the electron microscope. This is because as a by-product of pressing Prinsepia utilis Royle oil, there is still oil residue in the Prinsepia utilis Royle residue powder. Therefore, under the electron microscope, the micronized Prinsepia utilis Royle residue powder still has an agglomeration phenomenon.

[0046] <Test Example 4> This test example conducts interfacial tension testing.

[0047] The interfacial tension was measured using a Drop Shape Analyzer (DSA25) with a pendant drop module. Different oils were added to the sample cell, and a drop of the micronized Prinsepia utilis Royle residue powder dispersion (1.0 wt %) diluted with purified water was suspended on the needle tip of the injection device and injected into a glass dish containing the oil phase. The temperature was controlled at 25 ± 0.5 °C, and the time was 1800 s. The changes in the droplet radius and shape were recorded, and thus the interfacial tension changes were calculated through the software Advance, taking into account the needle diameter and the oil-water phase densities. The initial interfacial tension was the interfacial tension at the moment when the dispersion just contacted the oil phase, and the final interfacial tension was the interfacial tension at the adsorption equilibrium of the micronized Prinsepia utilis Royle residue powder at the oil-water interface after the micronized Prinsepia utilis Royle residue powder dispersion entered the oil phase. The results are shown in Figure 4 .

[0048] Initially, the interfacial tension is related to the polarity of the oil. The lower the polarity of the oil, the greater the interfacial tension with the aqueous phase. When the micronized Prinsepia utilis Royle powder gradually adsorbs at the oil-water interface, the interfacial tension begins to decrease and reaches equilibrium. The difference between the initial interfacial tension and the final interfacial tension is related to the emulsifying ability of the micronized Prinsepia utilis Royle powder for different oils. As Figure 4 can be seen, the interfacial tension of mineral oil, squalane, and caprylic / capric triglyceride decreases most significantly, while the interfacial tension of PPG-15 stearyl ether decreases the least, which is also consistent with the final emulsifying effect.

[0049] <Test Example 5> In this test example, the fluorescence of the emulsion was observed using a microscope.

[0050] To observe the arrangement of the Prinsepia utilis Royle powder at the oil-water interface and its distribution in the continuous phase, fluorescence observation was performed on the emulsion (Example 8) with 3% micronized Prinsepia utilis Royle powder as the solid emulsifier and squalane as the oil phase. The specific experimental process is as follows: According to the formula of Example 8, Nile red was added to the oil phase squalane and stirred evenly for staining. Congo red was added to the micronized Prinsepia utilis Royle powder dispersed in water and stirred evenly for staining. Then, the emulsion was prepared according to the preparation method of Example 8 and reserved. The above emulsion sample was 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) appears green; Congo red (excitation wavelength: 552 nm, emission wavelength: 636 nm) appears red. As Figure 5 shown, Figure 5 In a, the inside of the emulsifying particles is green, which is squalane stained with Nile red, indicating that this emulsion is an oil-in-water emulsion; Figure 5 In b, the particles at the interface of the emulsifying particles and in the continuous phase are red, which are micronized Prinsepia utilis Royle powder stained with Congo red, indicating that the micronized Prinsepia utilis Royle powder adsorbs at the oil-water interface and acts as a solid emulsifier. A large amount of micronized Prinsepia utilis Royle powder in the continuous phase also helps to stabilize the system, which is in line with the mechanical barrier theory and the three-dimensional viscoelastic particle network mechanism for the stability of the Pickering emulsion system.

[0051] <Test Example 6> In this test example, the DPPH free radical scavenging rate was measured.

[0052] The DPPH free radical scavenging rate experiment was used to test the antioxidant performance of the Pickering emulsion formula containing only water, squalane, and micronized Prinsepia utilis Royle powder.

[0053] In the experiment, DPPH powder was weighed and dissolved in ethanol (0.1 mg / mL) to obtain an ethanol solution. The absorbance Ai was measured as a control and used immediately. All emulsions (Examples 2 and 7 - 10) were diluted 10 times with purified water for subsequent testing. The above - diluted emulsions were mixed with ethanol as a blank control to measure A0. At the same time, the above - diluted emulsions were 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 using a microplate reader (Multiskan Sky High). A j to determine the inhibitory or scavenging ability of the samples. In the same way, the above 5 emulsions were tested respectively, and the test results are shown in Figure 6 .

[0054] The lower the absorbance, the stronger the inhibitory or scavenging ability. The DPPH scavenging activity was calculated using Equation 1 Scavenging rate = (A i - ( A j - A0)) / A i * 100% (1) where Ai represents the absorbance of the control group without the sample, A0 represents the absorbance of the negative blank control group without DPPH, and Aj represents the absorbance of the solution containing the sample.

[0055] In Examples 2 and 7 - 10, the effects of different contents of micronized Prinsepia utilis Royle fruit pomace powder on the formula were investigated, especially on the DPPH radical scavenging rate. In Examples 2 and 7 - 10, the contents of micronized Prinsepia utilis Royle fruit pomace powder were 1.0%, 0.5%, 1.5%, 2.0%, and 3.0% in sequence. From Figure 6 the results, it can be seen that Example 7 contains 0.5% micronized Prinsepia utilis Royle fruit pomace powder, and its DPPH radical scavenging rate (68.05%) is the lowest; while Example 10 contains 3.0% micronized Prinsepia utilis Royle fruit pomace powder, and its DPPH radical scavenging rate (91.71%) is the highest. Therefore, it shows that the addition of Prinsepia utilis Royle fruit pomace powder in the system brings good antioxidant performance to the water - in - oil skin - care lotion; with the increase of the content of micronized Prinsepia utilis Royle fruit pomace powder in the Example formula, the DPPH radical scavenging rate gradually increases.

[0056] <Test Example 7> This test example conducts a microscopic structure test on the skin - care lotion and skin - care cream in the application example.

[0057] A small amount of skin - care lotion or skin - care cream was placed on a microscope slide and gently covered with a coverslip. The samples were observed using an optical microscope, and all samples were observed at room temperature and representative pictures were taken. The results are shown in Figure 7 . Among themFigure 7 Among A to E, they respectively correspond to Application Examples 1 to 5, and among F to I, they respectively correspond to Application Examples 6 to 9.

[0058] Combined with Figure 7 the microscopy results, it can be seen from Application Examples 1 - 5 that 1.0% of micronized Prinsepia utilis Royle fruit pomace powder ( Figure 7 A~ Figure 7 D) and 3.0% of micronized Prinsepia utilis Royle fruit pomace powder ( Figure 7 E) have good emulsifying effects on type I oils (squalane) and type II oils (ethylhexyl palmitate, triglyceride caprylate / caprate, polydimethylsiloxane) with mass contents in the range of 10.0 - 40.0%. Among them, the emulsifying particles of the skin care lotion with 10.0% squalane are the smallest and most uniform.

[0059] Combined with Figure 7 the microscopy results, it can be seen from Application Examples 6 - 9 that 1.0% of micronized Prinsepia utilis Royle fruit pomace powder ( Figure 7 F~ Figure 7 H) and 3.0% of micronized Prinsepia utilis Royle fruit pomace powder ( Figure 7 I) have good emulsifying effects on type I oils (squalane) and type II oils (ethylhexyl palmitate, triglyceride caprylate / caprate) with mass contents in the range of 10.0 - 40.0%. Obvious emulsifying particles can be observed. In Comparative Example 2, no emulsifying agent was involved, so emulsifying particles could not be observed under the microscope, and thus its microscopy image is not shown.

[0060] <Test Example 8> In this test example, the DPPH free radical scavenging rate was tested.

[0061] The DPPH free radical scavenging rate experiment was used to test the antioxidant performance of the formulations of Application Example 6 and Comparative Example 2. Among them, the application example and the comparative example were respectively diluted 80 times, and other experimental conditions and methods were the same as those in Test Example 6. The results are shown in Figure 8 .

[0062] For Application Example 6 and Comparative Example 2, the effect of 1.0% content of micronized Prinsepia utilis Royle fruit pomace powder on the same formulation was investigated, especially the effect on the DPPH free radical scavenging rate. It can be seen from Table 3 that in Application Example 6, except for 1.0% more micronized Prinsepia utilis Royle fruit pomace powder in the formulation than in Comparative Example 2, the types and contents of the remaining formulation components are the same; and from Figure 8 it can be seen that the DPPH free radical scavenging rate of Application Example 6 (58.69%) is much higher than that of Comparative Example 2 (19.93%). Therefore, it shows that the addition of Prinsepia utilis Royle fruit pomace powder in the formulation system brings good antioxidant performance to the water-in-oil skin care cream.

[0063] In summary, as a natural plant powder, the Prinsepia utilis Royle fruit pomace powder, when added to a cosmetic formulation, not only acts as a solid emulsifier but also imparts excellent antioxidant properties to the formulation, showing good application prospects in the field of cosmetics.

[0064] The applicant declares that the above description is only a specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A Pickering emulsion containing pricklyash residue powder, characterized in that, By mass percentage, it includes the following components: Oil and fat, 5.0% - 50.0%; Pricklyash fruit residue powder, 0.1% - 5.0%; Water, up to 100%.

2. The Pickering emulsion containing Prinsepia utilis Royle residue powder according to claim 1, characterized in that, The particle size of the pricklyash fruit residue powder is 10 - 40 microns.

3. The Pickering emulsion containing Prinsepia utilis Royle residue powder according to claim 1, characterized in that, The mass percentage of the pricklyash fruit residue powder is 0.5% - 3.0%.

4. The Pickering emulsion containing Prinsepia utilis Royle pomace powder according to claim 1, wherein, The oil and fat is polar oil and fat or / and non-polar oil and fat with a polarity index between 20 mN / m and 30 mN / m.

5. The Pickering emulsion containing pricklyash residue powder according to claim 4, characterized in that, The polar oils with a polar index between 20 mN / m and 30 mN / m are any one or more of cetearyl ethylhexanoate, ethylhexyl palmitate, isopropyl palmitate, isopropyl myristate, polydimethylsiloxane, dimethicone, isopropyl stearate, triglyceride of caprylic / capric acid, isopropyl isostearate, or octyldodecanol; the non-polar oils are any one or more of squalane, mineral oil, or C 12 -C 14 isoparaffin.

6. A method for preparing a Pickering emulsion containing pricklyash peel powder as described in any one of claims 1 to 5, characterized in that, It includes the following steps: Step S1, weigh the pricklyash fruit residue powder according to a predetermined ratio, add it to water and mix and stir to obtain phase A; Step S2, weigh the oil and fat according to a predetermined ratio as phase B; Step S3, mix phase A and phase B and perform homogenization treatment to obtain a Pickering emulsion containing pricklyash fruit residue powder.

7. Application of pricklyash fruit residue powder as a solid emulsifier in the preparation of cosmetics.

8. The application of the pricklyash fruit pomace powder as a solid emulsifier in the preparation of cosmetics according to claim 7, wherein The mass percentage of pricklyash fruit residue powder in the cosmetics is 1.0% - 3.0%, and the mass percentage of the internal phase is 10% - 40%.

9. The application of the Prinsepia utilis Royle residue powder as a solid emulsifier in the preparation of cosmetics according to claim 7, characterized in that, The cosmetic is a skin care lotion. By mass percentage, the skin care lotion includes the following components: Oil and fat, 10.0% - 40.0%; Pricklyash fruit residue powder, 1.0% - 3.0%; Humectant, 2.0% - 20.0%; Thickener, 0.1% - 0.7%; p-Hydroxyacetophenone, 0.1% - 0.5%; Water, up to 100%.

10. The application of the pricklypear pomace powder as a solid emulsifier in the preparation of cosmetics according to claim 7, characterized in that, The cosmetic is a skin care cream. By mass percentage, the skin care cream includes the following components: Oil and fat, 10.0% - 40.0%; Pricklyash fruit residue powder, 1.0% - 3.0%; Humectant, 2.0% - 20.0%; Thickener, 0.1% - 0.7%; p-Hydroxyacetophenone, 0.1% - 0.5%; Arginine, 0.1% - 0.7%; Water, up to 100%.

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