CN111228187A

CN111228187A - Whitening and moisturizing emulsion suitable for oily skin and preparation method thereof

Info

Publication number: CN111228187A
Application number: CN202010264764.7A
Authority: CN
Inventors: 王跃
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-06-05

Abstract

The invention discloses a whitening and moisturizing emulsion suitable for oily skin and a preparation method thereof, wherein the whitening and moisturizing emulsion comprises stearic acid, glycerol, titanium dioxide, anhydrous sodium carbonate, sodium hyaluronate and other components; meanwhile, the plant extracting solution comprises an extracting solution B, and the extracting solution B is obtained by ultrasonic alcohol extraction of strawberries and calotropis gigantea leaves. The components of the skin-care lotion are properly mixed, the prepared skin-care lotion has excellent whitening, oil control and moisturizing performances, can effectively maintain the water-oil balance of skin, keep the skin fresh and moist, effectively absorb grease on the surface of the skin and realize lasting oil control, has excellent anti-aging and anti-inflammatory effects, can ensure the vitality of the skin, avoids inflammation pocks and has high practicability.

Description

Whitening and moisturizing emulsion suitable for oily skin and preparation method thereof

Technical Field

The invention relates to the technical field of cosmetics, in particular to a whitening and moisturizing emulsion suitable for oily skin and a preparation method thereof.

Background

Along with the gradual improvement of living standard of people and the continuous progress of society, cosmetics become indispensable daily necessities in modern life, and cosmetics prepared from natural plant raw materials which are harmless to human health and have beauty and health care effects attract wide attention, and green natural cosmetics are the development direction of the cosmetic industry.

The lotion has good skin moistening effect and moisturizing effect, is particularly suitable for dry spring and autumn, can be used in winter if the skin is neutral, and can isolate the external dry climate besides the skin moisturizing effect when used in spring and autumn, thereby preventing the skin from losing too fast moisture and avoiding the skin from drying and cracking and peeling, and being a necessary skin care product when going out in dry season.

In the existing market, the types and brands of the emulsion are various, but the products generally have the problems of poor moisture retention and poor oil control effect persistence, and have high skin irritation and poor practicability when being applied.

Aiming at the problem, a whitening and moisturizing emulsion suitable for oily skin and a preparation method thereof are designed, which are one of the technical problems to be solved urgently.

Disclosure of Invention

The invention aims to provide a whitening and moisturizing emulsion suitable for oily skin and a preparation method thereof, and aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the whitening and moisturizing emulsion suitable for oily skin comprises the following raw materials: 8-10 parts of stearic acid, 18-22 parts of glycerol, 4-8 parts of titanium dioxide, 2-3 parts of anhydrous sodium carbonate, 2-3 parts of cetyl alcohol, 4-5 parts of triethanolamine, 10-15 parts of sodium hyaluronate, 3-5 parts of preservative, 3-4 parts of essence, 10-20 parts of plant extract and 8-12 parts of modified starch.

The invention discloses a whitening and moisturizing emulsion suitable for oily skin and a preparation method thereof, wherein the whitening and moisturizing emulsion comprises stearic acid, glycerol, titanium dioxide, anhydrous sodium carbonate, sodium hyaluronate and other components; meanwhile, the plant extract liquid comprises an extract liquid B, the extract liquid B is obtained by extracting strawberries and calotropis gigantea leaves with ultrasonic alcohol, the extract liquid B contains a large amount of strawberry polyphenols, and the strawberry polyphenols can be used as a chemical sunscreen agent to absorb ultraviolet light energy and convert the ultraviolet light energy into heat energy or harmless low-energy radiation, so that the skin is protected.

The plant extract also comprises a ilex chinensis leaf extract which contains β -hydroxy acid, has excellent lipid solubility, can be combined with skin surface layers rich in grease, ensures natural falling of skin surface layer cells and regeneration of new cells, promotes removal of aged cutin in pores, and has a certain anti-aging effect, and the grifola frondosa extract contains baicalein and radix et rhizoma rhei aglycone which have higher anti-oxidation activity, can effectively reduce generation of skin free radicals and remove generated free radicals, can make pigmentation and chloasma on the surface of the skin disappear, has a certain whitening and anti-aging effect, and can be used as a chemical sunscreen component to absorb ultraviolet rays to play a role in sunscreen and whitening.

The extracting solution A is obtained by ultrasonic water extraction of ginkgo leaves and verbena, contains flavonoid compounds extracted from the ginkgo leaves and the verbena, and can be matched with the strawberry polyphenol and the scutellaria baicalensis extracting solution in the extracting solution B to have the effects of sun screening and whitening; meanwhile, the flavonoid compound also has strong antibacterial and bacteriostatic effects, and can ensure that the skin surface is clean to the greatest extent; the extracting solution B is obtained by ultrasonic alcohol extraction of strawberries and calotropis gigantea leaves, and the extracting solution B comprises strawberry polyphenol extracted from strawberries, so that the strawberry polyphenol has a relatively excellent inhibiting effect on tyrosinase, and the tyrosinase is one of melanin reasons, so that the whitening effect of the emulsion is obviously improved after the extracting solution B is added; the extract B also comprises a calotropis gigantea leaf extract which has excellent antioxidant activity, can remove free radicals on the surface of skin, has certain anti-inflammatory and skin healing promoting effects, and can prevent the occurrence of acne and skin inflammation while controlling oil.

The invention also adds modified starch comprising porous starch, zein, chitosan and other components, wherein the porous starch is prepared from corn starch, complex enzyme, octenyl succinic anhydride,The aluminum sulfate is prepared by reaction, when in preparation, the corn starch is pretreated by using complex enzyme, the starch is disordered and forms a porous structure, and the specific surface area is increased; after enzymolysis, the porous starch is esterified by utilizing octenyl succinic anhydride and Al in aluminum sulfate is combined³⁺The esterified porous starch is crosslinked, so that the hydroxyl on the surface of the starch is shielded, and the hydrophobicity of the porous starch is improved; meanwhile, after esterification treatment, the long-chain ester group replaces hydrophilic hydroxyl, so that the lipophilic property of the starch granules is improved, and the oil absorption property of the starch granules is improved along with the improvement of the hydrophobic property; the prepared porous starch is of a porous structure, is excellent in hydrophobic oil absorption performance, can effectively improve the oil control and oil absorption effects of the product after being added, and can ensure fresh and moist skin during use due to the hydrophobic performance.

The invention also adds the components such as zein, chitosan and the like, and utilizes the interaction between the chitosan and the zein to form colloid particles of the zein wrapped by the chitosan, the colloid particles not only can play a loading role on the porous starch, but also can play a certain slow release role, so that the obtained emulsion is ensured to have an excellent long-acting oil control effect, and simultaneously, the colloid particles can be used as an emulsion oil-water interface emulsion stabilizer to greatly enhance the emulsion stability.

According to an optimized technical scheme, the plant extracting solution comprises the following raw materials: according to weight, the Chinese ilex leaf extract is 6-10 parts, the scutellaria baicalensis extract is 5-9 parts, the extract A10-15 parts and the extract B10-15 parts;

the extracting solution A is obtained by ultrasonic water extraction of ginkgo leaves and verbena; the extracting solution B is obtained by ultrasonic alcohol extraction of strawberry and calotropis gigantea leaves.

According to an optimized technical scheme, the modified starch comprises the following raw materials in parts by weight: 10-20 parts of porous starch, 10-18 parts of zein, 20-30 parts of ethanol, 8-14 parts of chitosan and 20-30 parts of acetic acid.

According to an optimized technical scheme, the porous starch is prepared by reacting corn starch, complex enzyme, octenyl succinic anhydride and aluminum sulfate.

According to the optimized technical scheme, the complex enzyme comprises α -amylase and glucose saccharifying enzyme, and the volume ratio of α -amylase to glucose saccharifying enzyme is 1 (3-4).

In an optimized technical scheme, the preservative is sorbic acid.

A preparation method of whitening and moisturizing emulsion suitable for oily skin comprises the following steps:

1) preparing materials;

2) preparing a plant extracting solution:

a) collecting folium Ilicis Purpureae, naturally air drying, freezing with liquid nitrogen, standing at (-10) - (-20) deg.C, placing in distilled water, heating to 40-70 deg.C under nitrogen protection, soaking at constant temperature, and collecting distillate to obtain folium Ilicis Purpureae extract;

b) cleaning Scutellariae radix, oven drying, pulverizing into coarse powder, decocting in water for three times, filtering each time to obtain filtrate, mixing, and stirring to obtain Scutellariae radix extractive solution;

c) cleaning folium Ginkgo and herba Verbenae with hot water, soaking in sodium chloride solution, taking out, draining, oven drying, pulverizing, and sieving to obtain mixed material; adding distilled water into the mixed material, extracting with water under ultrasound, and filtering to obtain filtrate; taking filter residue, adding distilled water, repeating the ultrasonic water extraction step, filtering, mixing the filtrates obtained by filtering twice, and centrifuging to obtain an extracting solution A;

d) taking strawberries, cleaning, slicing, airing, pulping in a pulping machine, freeze-drying, and grinding to obtain strawberry powder; taking calotropis gigantea leaves, airing and crushing to obtain calotropis gigantea powder; mixing strawberry powder and calotropis gigantea powder, stirring, adding ethanol for dissolving, and performing ultrasonic extraction to obtain an extracting solution B;

3) preparing modified starch:

a) placing corn starch in a buffer solution, performing ultrasonic dispersion, adding a complex enzyme for enzymolysis, adding hydrochloric acid after the enzymolysis is finished, adjusting the pH, adding sodium hydroxide to neutralize the hydrochloric acid, performing vacuum filtration, washing, drying, crushing and sieving to obtain the enzymolysis starch;

b) placing the enzymatic starch in a water bath at 35-40 ℃, stirring, slowly dropwise adding octenyl succinic anhydride during stirring, reacting and keeping the pH at 8-8.5, washing after the reaction is finished, performing suction filtration, and drying to obtain esterified starch; dissolving esterified starch in distilled water, adding an aluminum sulfate solution, stirring for reaction, keeping the pH value at 4 during the reaction, washing with water after the reaction is finished, and drying to obtain porous starch;

c) dissolving zein in ethanol, stirring at normal temperature, adding porous starch, and continuously stirring to obtain solution C;

d) dissolving chitosan in acetic acid, stirring, slowly adding solution C, stirring, adding into high-shear homogeneous emulsifier, homogenizing and emulsifying for 5-8min, standing for 10-16min, standing, stirring at room temperature, removing ethanol, and centrifuging to obtain modified starch;

4) taking stearic acid, glycerol and titanium dioxide, heating in a water bath, heating, mixing and stirring until the stearic acid, the glycerol and the titanium dioxide are melted to obtain a material D; dissolving anhydrous sodium carbonate, cetyl alcohol and triethanolamine in distilled water, heating to 60-90 deg.C, and stirring to obtain material E;

5) and (3) slowly dripping the material E and the modified starch into the material D, keeping the temperature at 75-80 ℃, stirring, neutralizing and emulsifying, adding the extracting solution A and the extracting solution B, continuing stirring, adding the scutellaria baicalensis extracting solution and the folium ilicis chinensis extracting solution, continuing stirring, adding the sodium hyaluronate aqueous solution, stirring, slowly cooling to 40-50 ℃ after stirring, adding the preservative and the essence, and uniformly mixing to obtain the moisturizing emulsion.

The optimized technical scheme comprises the following steps:

1) preparing materials:

a) weighing folium Ilicis Purpureae, Scutellariae radix, folium Ginkgo, herba Verbenae, sodium chloride, Calotropis procera leaf, strawberry and ethanol;

b) weighing corn starch, buffer solution, complex enzyme, hydrochloric acid, octenyl succinic anhydride, sodium hydroxide, aluminum sulfate, zein, chitosan and acetic acid for later use;

c) weighing stearic acid, glycerol, titanium dioxide, anhydrous sodium carbonate, cetyl alcohol, triethanolamine, sodium hyaluronate, preservative and essence for later use;

2) preparing a plant extracting solution:

a) naturally air drying folium Ilicis Purpureae, freezing with liquid nitrogen at (-40) - (-50) deg.C for 10-20min, standing at (-10) - (-20) deg.C for 4-6 hr, placing in distilled water, heating to 40-70 deg.C under nitrogen protection, soaking at constant temperature for 1-2 hr, and collecting distillate to obtain folium Ilicis Purpureae extract;

b) cleaning Scutellariae radix, oven drying, pulverizing into coarse powder, decocting in water for three times at 40-70 deg.C for 4-5 hr, filtering to obtain filtrate, mixing, and stirring for 10-15min to obtain Scutellariae radix extractive solution;

c) cleaning folium Ginkgo and herba Verbenae with 40-50 deg.C hot water, soaking in sodium chloride solution at 90-100 deg.C for 15-20min, taking out, draining, oven drying at 70-80 deg.C, pulverizing, and sieving with 60 mesh sieve to obtain mixed material; adding 8-10 times of distilled water into the mixed material, extracting with ultrasonic wave at 50-65kHz for 16-18min at 40-50 deg.C to obtain filtrate, filtering to obtain filter residue, adding 4 times of distilled water into the filter residue, repeating the ultrasonic water extraction step for 5-8min, filtering, mixing the filtrates, and centrifuging to obtain extractive solution A;

a) taking strawberries, cleaning, slicing, airing, pulping in a pulping machine, freeze-drying for 8-10h, and grinding to obtain strawberry powder; taking calotropis gigantea leaves, airing and crushing to obtain calotropis gigantea powder; mixing and stirring strawberry powder and calotropis gigantea powder for 15-25min, adding ethanol for dissolving, soaking at room temperature for 2-3d, and performing ultrasonic extraction under the conditions that the ultrasonic power is 600-700W, the ultrasonic time is 30-40min, and the ultrasonic temperature is 40-50 ℃ to obtain an extracting solution B;

3) preparing modified starch:

a) placing corn starch in buffer solution, performing ultrasonic dispersion for 5-8min, adding complex enzyme, performing enzymolysis for 20-30min at 50-55 deg.C, adding hydrochloric acid, adjusting pH to 3, reacting for 15min, adding sodium hydroxide to neutralize hydrochloric acid, vacuum filtering, washing, drying, pulverizing, and sieving with 80 mesh sieve to obtain enzymolysis starch;

b) placing the enzymatic starch in a water bath at 35-40 ℃, stirring for 50-60min, slowly dropwise adding octenyl succinic anhydride while stirring, reacting and keeping the pH at 8-8.5, washing after the reaction is finished, performing suction filtration, and drying to obtain esterified starch; dissolving esterified starch in distilled water, adding aluminum sulfate solution, stirring for reaction, keeping pH at 4 during reaction, washing with water after reaction, and drying at 50-55 deg.C for 20-24 hr to obtain porous starch;

c) dissolving zein in ethanol, stirring at the normal temperature of 400-500rpm for 20-30min, adding porous starch, and continuously stirring for 20-30min to obtain a solution C;

d) dissolving chitosan and acetic acid, stirring for 5-6h at the stirring speed of 900-1000rpm, slowly adding the solution C after stirring, continuously stirring for 10-20min, then placing in a high-shear homogeneous emulsifier, homogenizing and emulsifying for 5-8min, standing for 10-16min, stirring for 10-25min at normal temperature after standing, removing ethanol, and centrifuging to obtain modified starch;

4) heating stearic acid, glycerol and titanium dioxide in a water bath, keeping the temperature at 60-90 ℃, mixing and stirring until the stearic acid, the glycerol and the titanium dioxide are melted to obtain a material D; dissolving anhydrous sodium carbonate, cetyl alcohol and triethanolamine in distilled water, heating to 60-90 deg.C, and stirring for 20-30min to obtain material E;

5) slowly dripping the material E and the modified starch into the material D, keeping the temperature at 75-80 ℃, stirring for neutralization emulsification, stirring for 2-3h, adding the extracting solution A and the extracting solution B, continuously stirring for 1-1.5h, adding the scutellaria baicalensis extracting solution and the ilex chinensis leaf extracting solution, continuously stirring for 40-50min, adding the sodium hyaluronate aqueous solution, stirring for 20-30min, slowly cooling to 40-50 ℃ after stirring, adding the preservative and the essence, and uniformly mixing to obtain the moisturizing emulsion.

According to an optimized technical scheme, in the step a) of the step 3), the buffer solution is a mixed solution of citric acid and disodium hydrogen phosphate.

Compared with the prior art, the invention has the beneficial effects that:

the invention discloses a whitening and moisturizing emulsion suitable for oily skin, which has reasonable process design and proper component proportion, the prepared emulsion has excellent whitening, oil control and moisturizing performances, can effectively maintain the water-oil balance of the skin, keep the skin fresh and moist, effectively absorb grease on the surface of the skin and realize lasting oil control, and the emulsion also has excellent anti-aging and anti-inflammatory effects, can ensure the vitality of the skin and avoid inflammation pocks and has higher practicability.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

s1: preparing materials:

s2: preparing a plant extracting solution:

taking folium Ilicis Purpureae, naturally air drying, freezing with liquid nitrogen at (-40) deg.C for 10min, standing at (-10) deg.C for 4 hr after freezing, placing in distilled water, heating to 40 deg.C under nitrogen protection, soaking at constant temperature for 1 hr, and collecting distillate to obtain folium Ilicis Purpureae extract;

cleaning Scutellariae radix, oven drying, pulverizing into coarse powder, decocting in water for three times at 40 deg.C for 4 hr, filtering to obtain filtrate, mixing, and stirring for 10min to obtain Scutellariae radix extractive solution;

cleaning folium Ginkgo and herba Verbenae with 40 deg.C hot water, soaking in sodium chloride solution at 90 deg.C for 15min, taking out, draining, oven drying at 70 deg.C, pulverizing, and sieving with 60 mesh sieve to obtain mixed material; adding 8 times of distilled water into the mixed material, performing water extraction under ultrasonic waves with ultrasonic frequency of 50kHz and extraction time of 16min at 40 ℃, filtering to obtain filtrate, taking filter residue, adding 4 times of distilled water, repeating the ultrasonic water extraction step with extraction time of 5min, filtering, mixing the filtrate obtained by filtering twice, and centrifuging to obtain extract A;

taking strawberries, cleaning, slicing, airing, pulping in a pulping machine, freeze-drying for 8 hours, and grinding to obtain strawberry powder; taking calotropis gigantea leaves, airing and crushing to obtain calotropis gigantea powder; mixing strawberry powder and calotropis gigantea powder, stirring for 15min, adding ethanol for dissolving, soaking at room temperature for 2d, and performing ultrasonic extraction under the condition of ultrasonic power of 600W for 30min at 40 deg.C to obtain extractive solution B;

s3: preparing modified starch:

placing corn starch in buffer solution, performing ultrasonic dispersion for 5min, adding complex enzyme, performing enzymolysis for 20min at 50 deg.C, adding hydrochloric acid, adjusting pH to 3, reacting for 15min, adding sodium hydroxide to neutralize hydrochloric acid, vacuum filtering, washing, drying, pulverizing, and sieving with 80 mesh sieve to obtain enzymolysis starch; wherein the buffer solution is a mixed solution of citric acid and disodium hydrogen phosphate;

placing the enzymatic starch in a water bath at 35 ℃, stirring for 50min, slowly dropwise adding octenyl succinic anhydride during stirring, reacting and keeping the pH at 8, washing after the reaction is finished, performing suction filtration, and drying to obtain esterified starch; dissolving esterified starch in distilled water, adding an aluminum sulfate solution, stirring for reaction, keeping the pH value at 4 during the reaction, washing with water after the reaction is finished, and drying at 50 ℃ for 20 hours to obtain porous starch;

dissolving zein in ethanol, and stirring at normal temperature for 20min at the stirring speed of 400rpm to obtain a solution C;

dissolving chitosan and acetic acid, stirring for 5h at the stirring speed of 900rpm, slowly adding the solution C after stirring, continuously stirring for 10min, adding porous starch, continuously stirring for 20min, then placing in a high-shear homogeneous emulsifier, homogenizing and emulsifying for 5min, standing for 10min, stirring for 10min at normal temperature after standing, removing ethanol, and centrifuging to obtain modified starch;

s4: taking stearic acid, glycerol and titanium dioxide, heating in a water bath, keeping the temperature at 60 ℃, and mixing and stirring until the stearic acid, the glycerol and the titanium dioxide are melted to obtain a material D; dissolving anhydrous sodium carbonate, cetyl alcohol and triethanolamine in distilled water, heating to 60 deg.C, and stirring for 20min to obtain material E;

s5: and (3) slowly dropwise adding the material E and the modified starch into the material D, keeping the temperature at 75 ℃, stirring for neutralization and emulsification, stirring for 2 hours, adding the extracting solution A and the extracting solution B, continuing stirring for 1 hour, adding the scutellaria baicalensis extracting solution and the ilex chinensis leaf extracting solution, continuing stirring for 40 minutes, adding the sodium hyaluronate aqueous solution, stirring for 20 minutes, slowly cooling to 40 ℃ after stirring, adding the preservative and the essence, and uniformly mixing to obtain the moisturizing emulsion.

In this example, the moisturizing emulsion comprises the following raw materials: 8 parts of stearic acid, 18 parts of glycerol, 4 parts of titanium dioxide, 2 parts of anhydrous sodium carbonate, 2 parts of hexadecanol, 4 parts of triethanolamine, 10 parts of sodium hyaluronate, 3 parts of preservative, 3 parts of essence, 10 parts of plant extract and 8 parts of modified starch.

The plant extract comprises the following raw materials: according to weight, the Chinese ilex leaf extract liquid comprises 6 parts of Chinese ilex leaf extract liquid, 5 parts of scutellaria baicalensis extract liquid, 10 parts of extract liquid A and 10 parts of extract liquid B; the modified starch comprises the following raw materials in parts by weight: 10 parts of porous starch, 10 parts of zein, 20 parts of ethanol, 8 parts of chitosan and 20 parts of acetic acid.

The complex enzyme comprises α -amylase and glucose saccharifying enzyme, wherein the volume ratio of α -amylase to glucose saccharifying enzyme is 1: 3, and the preservative is sorbic acid.

Example 2:

s1: preparing materials:

s2: preparing a plant extracting solution:

taking folium Ilicis Purpureae, naturally air drying, freezing with liquid nitrogen at (-45) 5 deg.C for 15min, freezing, standing at (-15) deg.C for 5 hr, placing in distilled water, heating to 60 deg.C under nitrogen protection, soaking at constant temperature for 1.5 hr, and collecting distillate to obtain folium Ilicis Purpureae extract;

cleaning Scutellariae radix, oven drying, pulverizing into coarse powder, decocting in water for three times at 65 deg.C for 4.5 hr, filtering to obtain filtrate, mixing, and stirring for 12min to obtain Scutellariae radix extractive solution;

cleaning folium Ginkgo and herba Verbenae with 45 deg.C hot water, soaking in sodium chloride solution at 95 deg.C for 18min, taking out, draining, oven drying at 75 deg.C, pulverizing, and sieving with 60 mesh sieve to obtain mixed material; adding 9 times of distilled water into the mixed material, performing water extraction under ultrasonic waves, wherein the ultrasonic frequency is 58kHz, the extraction time is 17min, the extraction temperature is 45 ℃, filtering to obtain a filtrate, taking filter residues, adding 4 times of distilled water, repeating the ultrasonic water extraction step, wherein the extraction time is 6min, filtering, mixing the filtrate obtained by filtering twice, and centrifuging to obtain an extracting solution A;

taking strawberries, cleaning, slicing, airing, pulping in a pulping machine, freeze-drying for 9 hours, and grinding to obtain strawberry powder; taking calotropis gigantea leaves, airing and crushing to obtain calotropis gigantea powder; mixing strawberry powder and Calotropis gigantea powder, stirring for 20min, adding ethanol for dissolving, soaking at room temperature for 2.5d, and performing ultrasonic extraction at ultrasonic power of 650W for 35min at ultrasonic temperature of 45 deg.C to obtain extractive solution B;

s3: preparing modified starch:

placing corn starch in buffer solution, performing ultrasonic dispersion for 6min, adding complex enzyme, performing enzymolysis for 25min at 52 deg.C, adding hydrochloric acid, adjusting pH to 3, reacting for 15min, adding sodium hydroxide to neutralize hydrochloric acid, vacuum filtering, washing, drying, pulverizing, and sieving with 80 mesh sieve to obtain enzymolysis starch; wherein the buffer solution is a mixed solution of citric acid and disodium hydrogen phosphate;

placing the enzymatic starch in a 38 ℃ water bath, stirring for 55min, slowly dropwise adding octenyl succinic anhydride during stirring, reacting and keeping the pH at 8, washing after the reaction is finished, performing suction filtration, and drying to obtain esterified starch; dissolving esterified starch in distilled water, adding an aluminum sulfate solution, stirring for reaction, keeping the pH value at 4 during the reaction, washing with water after the reaction is finished, and drying at 53 ℃ for 22 hours to obtain porous starch;

dissolving zein in ethanol, and stirring at normal temperature for 25min at the rotation speed of 450rpm to obtain a solution C;

dissolving chitosan and acetic acid, stirring for 5.5h at the stirring speed of 950rpm, slowly adding the solution C after stirring, continuously stirring for 15min, adding porous starch, continuously stirring for 25min, then placing in a high-shear homogeneous emulsifier, homogenizing and emulsifying for 7min, standing for 15min, stirring for 20min at normal temperature after standing, removing ethanol, and centrifuging to obtain modified starch;

s4: taking stearic acid, glycerol and titanium dioxide, heating in a water bath, keeping the temperature at 75 ℃, mixing and stirring until the stearic acid, the glycerol and the titanium dioxide are melted to obtain a material D; dissolving anhydrous sodium carbonate, cetyl alcohol and triethanolamine in distilled water, heating to 75 deg.C, and stirring for 25min to obtain material E;

s5: and (3) slowly dropwise adding the material E and the modified starch into the material D, keeping the temperature at 78 ℃, stirring for neutralization and emulsification, stirring for 2.5 hours, then adding the extracting solution A and the extracting solution B, continuing to stir for 1.2 hours, then adding the scutellaria baicalensis extracting solution and the ilex chinensis leaf extracting solution, continuing to stir for 45 minutes, adding the sodium hyaluronate aqueous solution, stirring for 25 minutes, slowly cooling to 45 ℃ after stirring, adding the preservative and the essence, and uniformly mixing to obtain the moisturizing emulsion.

In this example, the moisturizing emulsion comprises the following raw materials: 9 parts of stearic acid, 20 parts of glycerol, 6 parts of titanium dioxide, 2.5 parts of anhydrous sodium carbonate, 2.5 parts of hexadecanol, 4.5 parts of triethanolamine, 12 parts of sodium hyaluronate, 4 parts of preservative, 3.5 parts of essence, 15 parts of plant extract and 10 parts of modified starch.

The plant extract comprises the following raw materials: 8 parts of Chinese ilex leaf extract, 7 parts of scutellaria baicalensis extract, 12 parts of extract A and 12 parts of extract B by weight; the modified starch comprises the following raw materials in parts by weight: by weight, 15 parts of porous starch, 15 parts of zein, 25 parts of ethanol, 12 parts of chitosan and 25 parts of acetic acid.

The complex enzyme comprises α -amylase and glucose saccharifying enzyme, wherein the volume ratio of α -amylase to glucose saccharifying enzyme is 1: 3.5, and the preservative is sorbic acid.

Example 3:

s1: preparing materials:

s2: preparing a plant extracting solution:

taking folium Ilicis Purpureae, naturally air drying, freezing with liquid nitrogen at (-50) deg.C for 20min, freezing, standing at (-20) deg.C for 6 hr, standing in distilled water, heating to 70 deg.C under nitrogen protection, soaking at constant temperature for 2 hr, and collecting distillate to obtain folium Ilicis Purpureae extract;

cleaning Scutellariae radix, oven drying, pulverizing into coarse powder, decocting in water at 70 deg.C for 5 hr for three times, filtering to obtain filtrate, mixing, and stirring for 15min to obtain Scutellariae radix extractive solution;

cleaning folium Ginkgo and herba Verbenae with 50 deg.C hot water, soaking in sodium chloride solution at 100 deg.C for 20min, taking out, draining, oven drying at 80 deg.C, pulverizing, and sieving with 60 mesh sieve to obtain mixed material; adding 10 times of distilled water into the mixed material, performing water extraction under ultrasonic waves, wherein the ultrasonic frequency is 65kHz, the extraction time is 18min, the extraction temperature is 50 ℃, filtering to obtain a filtrate, taking filter residues, adding 4 times of distilled water, repeating the ultrasonic water extraction step, the extraction time is 8min, filtering, mixing the filtrate obtained by filtering twice, and centrifuging to obtain an extracting solution A;

taking strawberries, cleaning, slicing, airing, pulping in a pulping machine, freeze-drying for 10 hours, and grinding to obtain strawberry powder; taking calotropis gigantea leaves, airing and crushing to obtain calotropis gigantea powder; mixing strawberry powder and calotropis gigantea powder, stirring for 25min, adding ethanol for dissolving, soaking at room temperature for 3d, and performing ultrasonic extraction under the condition of ultrasonic power of 700W for 40min at 50 deg.C to obtain extractive solution B;

s3: preparing modified starch:

placing corn starch in buffer solution, performing ultrasonic dispersion for 8min, adding complex enzyme, performing enzymolysis for 30min at 55 deg.C, adding hydrochloric acid, adjusting pH to 3, reacting for 15min, adding sodium hydroxide to neutralize hydrochloric acid, vacuum filtering, washing, drying, pulverizing, and sieving with 80 mesh sieve to obtain enzymolysis starch; wherein the buffer solution is a mixed solution of citric acid and disodium hydrogen phosphate;

placing the enzymatic starch in a water bath at 40 ℃, stirring for 60min, slowly dropwise adding octenyl succinic anhydride during stirring, reacting and keeping the pH at 8.5, washing after the reaction is finished, performing suction filtration, and drying to obtain esterified starch; dissolving esterified starch in distilled water, adding an aluminum sulfate solution, stirring for reaction, keeping the pH value at 4 during the reaction, washing with water after the reaction is finished, and drying at 55 ℃ for 24 hours to obtain porous starch;

dissolving zein in ethanol, and stirring at normal temperature for 30min at the stirring speed of 500rpm to obtain a solution C;

dissolving chitosan and acetic acid, stirring for 6h at the stirring speed of 1000rpm, slowly adding the solution C after stirring, continuously stirring for 20min, adding porous starch, continuously stirring for 30min, then placing in a high-shear homogeneous emulsifier, homogenizing and emulsifying for 8min, standing for 16min, stirring for 25min at normal temperature after standing, removing ethanol, and centrifuging to obtain modified starch;

s4: taking stearic acid, glycerol and titanium dioxide, heating in a water bath, keeping the temperature at 90 ℃, and mixing and stirring until the stearic acid, the glycerol and the titanium dioxide are melted to obtain a material D; dissolving anhydrous sodium carbonate, cetyl alcohol and triethanolamine in distilled water, heating to 90 deg.C, and stirring for 30min to obtain material E;

s5: and (3) slowly dripping the material E and the modified starch into the material D, keeping the temperature at 80 ℃, stirring for neutralization and emulsification, stirring for 3 hours, adding the extracting solution A and the extracting solution B, continuously stirring for 1.5 hours, adding the scutellaria baicalensis extracting solution and the ilex chinensis leaf extracting solution, continuously stirring for 50 minutes, adding the sodium hyaluronate aqueous solution, stirring for 30 minutes, slowly cooling to 50 ℃ after stirring, adding the preservative and the essence, and uniformly mixing to obtain the moisturizing emulsion.

In this example, the moisturizing emulsion comprises the following raw materials: 10 parts of stearic acid, 22 parts of glycerol, 8 parts of titanium dioxide, 3 parts of anhydrous sodium carbonate, 3 parts of hexadecanol, 5 parts of triethanolamine, 15 parts of sodium hyaluronate, 5 parts of preservative, 4 parts of essence, 20 parts of plant extract and 12 parts of modified starch.

The plant extract comprises the following raw materials: 10 parts of Chinese ilex leaf extract, 9 parts of scutellaria baicalensis extract, 15 parts of extract A and 15 parts of extract B by weight; the modified starch comprises the following raw materials in parts by weight: by weight, 20 parts of porous starch, 18 parts of zein, 30 parts of ethanol, 14 parts of chitosan and 30 parts of acetic acid.

The complex enzyme comprises α -amylase and glucose saccharifying enzyme, wherein the volume ratio of α -amylase to glucose saccharifying enzyme is 1: 4, and the preservative is sorbic acid.

Experiment 1: safety test

The safety test site is Suzhou, 50 volunteers are selected as subjects in the experiment, wherein 3 subjects do not complete the experiment and withdraw, and the rest 47 subjects complete the trial experiment for 8 weeks as required;

the test samples of 47 subjects were the emulsion samples prepared in example 1, and were used 2-3 times per day, 0.30 ± 0.10g per person.

When in use, the skin of 4 patients has symptoms of local slight tightness, itching and the like, can be automatically removed, the continuous use is not influenced, and the other patients have no skin abnormal feeling, thereby having good use effect.

Experiment 2: oil control performance

The moisturizing emulsions prepared in examples 1 to 3 were taken as samples 1 to 3; and selecting 15 volunteers as a subject, dividing into three groups of 5 volunteers, and testing one group of samples by each group of volunteers.

During the test, the subject uses the standard face cleanser to clean the face, the initial oil content is measured by using a skin oil tester after the face is cleaned and dried, 0.05g of the test sample is coated on the left face of each volunteer, the right face is not treated, and the final oil content (ug/cm) of the skin is measured by using the skin oil tester after 5h²) The data of each group were averaged, and the specific data are shown in the following table:

experiment 3: moisture retention property

In the test, the inner sides of the forearms of both hands of the subject were used as test areas, the initial moisture content of the left forearm and the right forearm was measured using a skin moisture content measuring instrument, and 0.05g of the sample was applied to the left forearm and the right forearmThe arm is not treated, and is used by testing once every 1 hr until 4 hr, and detecting with skin moisture content tester to obtain final moisture content (ug/cm)²) The data of each group were averaged, and the specific data are shown in the following table:

and (4) conclusion: the components of the skin-care lotion are properly mixed, the prepared skin-care lotion has excellent whitening, oil control and moisturizing performances, can effectively maintain the water-oil balance of skin, keep the skin fresh and moist, effectively absorb grease on the surface of the skin and realize lasting oil control, has excellent anti-aging and anti-inflammatory effects, can ensure the vitality of the skin, avoids inflammation pocks and has high practicability.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The whitening and moisturizing emulsion suitable for oily skin is characterized by comprising the following components in parts by weight: the moisturizing emulsion comprises the following raw materials: 8-10 parts of stearic acid, 18-22 parts of glycerol, 4-8 parts of titanium dioxide, 2-3 parts of anhydrous sodium carbonate, 2-3 parts of cetyl alcohol, 4-5 parts of triethanolamine, 10-15 parts of sodium hyaluronate, 3-5 parts of preservative, 3-4 parts of essence, 10-20 parts of plant extract and 8-12 parts of modified starch.

2. The whitening and moisturizing emulsion suitable for oily skin according to claim 1, characterized in that: the plant extract comprises the following raw materials: according to weight, the Chinese ilex leaf extract is 6-10 parts, the scutellaria baicalensis extract is 5-9 parts, the extract A10-15 parts and the extract B10-15 parts;

3. The whitening and moisturizing emulsion suitable for oily skin according to claim 1, characterized in that: the modified starch comprises the following raw materials in parts by weight: 10-20 parts of porous starch, 10-18 parts of zein, 20-30 parts of ethanol, 8-14 parts of chitosan and 20-30 parts of acetic acid.

4. The whitening and moisturizing emulsion suitable for oily skin according to claim 3, wherein: the porous starch is prepared by reacting corn starch, complex enzyme, octenyl succinic anhydride and aluminum sulfate.

5. The whitening and moisturizing emulsion for oily skin as claimed in claim 4, wherein the complex enzyme comprises α -amylase and glucolase, and the volume ratio of α -amylase to glucolase is 1 (3-4).

6. The whitening and moisturizing emulsion suitable for oily skin according to claim 1, characterized in that: the preservative is sorbic acid.

7. A preparation method of whitening and moisturizing emulsion suitable for oily skin is characterized by comprising the following steps: the method comprises the following steps:

1) preparing materials;

2) preparing a plant extracting solution:

3) preparing modified starch:

c) dissolving zein in ethanol, and stirring at normal temperature to obtain a solution C;

d) dissolving chitosan in acetic acid, stirring, slowly adding solution C, stirring, adding porous starch, stirring, adding into high-shear homogeneous emulsifier, homogenizing and emulsifying for 5-8min, standing for 10-16min, stirring at room temperature, removing ethanol, and centrifuging to obtain modified starch;

8. The preparation method of the whitening and moisturizing emulsion suitable for oily skin according to claim 7, characterized by comprising the following steps: the method comprises the following steps:

1) preparing materials:

2) preparing a plant extracting solution:

d) taking strawberries, cleaning, slicing, airing, pulping in a pulping machine, freeze-drying for 8-10h, and grinding to obtain strawberry powder; taking calotropis gigantea leaves, airing and crushing to obtain calotropis gigantea powder; mixing and stirring strawberry powder and calotropis gigantea powder for 15-25min, adding ethanol for dissolving, soaking at room temperature for 2-3d, and performing ultrasonic extraction under the conditions that the ultrasonic power is 600-700W, the ultrasonic time is 30-40min, and the ultrasonic temperature is 40-50 ℃ to obtain an extracting solution B;

3) preparing modified starch:

c) dissolving zein in ethanol, and stirring at the normal temperature for 20-30min at the stirring speed of 400-500rpm to obtain a solution C;

d) dissolving chitosan and acetic acid, stirring for 5-6h at the stirring speed of 900-1000rpm, slowly adding the solution C after stirring, continuously stirring for 10-20min, adding porous starch, continuously stirring for 20-30min, then placing in a high-shear homogeneous emulsifier, homogenizing and emulsifying for 5-8min, standing for 10-16min, stirring for 10-25min at normal temperature after standing, removing ethanol, and centrifuging to obtain modified starch;

9. The preparation method of the whitening and moisturizing emulsion suitable for oily skin according to claim 8, characterized by comprising the following steps: in the step a) of the step 3), the buffer solution is a mixed solution of citric acid and disodium hydrogen phosphate.