CN115670982A - Essential oil-containing liquid crystal hand cream and preparation method thereof - Google Patents
Essential oil-containing liquid crystal hand cream and preparation method thereof Download PDFInfo
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- CN115670982A CN115670982A CN202211486756.2A CN202211486756A CN115670982A CN 115670982 A CN115670982 A CN 115670982A CN 202211486756 A CN202211486756 A CN 202211486756A CN 115670982 A CN115670982 A CN 115670982A
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Abstract
According to the liquid crystal type hand cream containing the essential oil and the preparation method thereof, parameters such as constant homogenizing speed, time, heating temperature and the like form a liquid crystal type with a hexagonal phase structure in a hand cream emulsion with a certain formula, and the quantity and the crystal form of crystals formed in the hand cream emulsion are adjusted through different essential oil adding modes and temperature reduction processes, so that the body feeling of the hand cream emulsion is adjusted. The liquid crystal type hand cream has good spreadability and air permeability, the body feeling is smoother due to the fact that a liquid crystal layer structure slides on the surface of skin, the number of white stripes of the liquid crystal type hand cream is obviously less than that of common hand cream in the smearing process, the liquid crystal type hand cream is completely absorbed within 3min after the product is smeared, and the liquid crystal type hand cream has a good moistening effect and is quick-drying after being smeared. The liquid crystal structure can slowly release the essential oil, can avoid volatilization of effective components of the hand cream, can also avoid the phenomenon that the essential oil is too fast permeated into the skin to cause discomfort of the skin, and in addition, the addition of the essential oil can well condition the skin and play an active role.
Description
Technical Field
The invention relates to a preparation method of hand cream, in particular to liquid crystal hand cream containing essential oil and a preparation method thereof, and belongs to the technical field of cosmetic preparation.
Background
With the increasing pursuit of health and the rapid development of dermatology, medical skin care products with higher safety and effectiveness have become an irresistible trend. The hands of people need to contact a lot of things every day, and the skin of the hands is very fragile, so that the protection of the skin of the hands is indispensable, and the requirement of people on beauty is met.
Because of the frequency of hand use, compared with other skin care products, special requirements are required for hand cream, such as fast absorption, nourishing without greasiness, ventilation, light weight and the like, certain efficacy is required, such as sun protection and the like, and corresponding hand care products are lacked in the market.
Therefore, there is a need to develop a liquid crystal type hand cream having efficacy and containing essential oils to meet the demand.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide liquid crystal type hand cream containing essential oil and a preparation method thereof.
In order to achieve the above object, the present invention adopts the following technical solutions:
a liquid crystal type hand cream containing essential oil comprises, by mass, 10% of squalane, 2% of shea butter, 3% of sweet almond oil, 2% of avocado oil, 4% of PE98 liquid crystal emulsifier, 0.5% of beeswax, 0.5% of xanthan gum, 9% of glycerol, 1.8% of essential oil and deionized water.
The preparation method comprises the following steps:
adding sweet almond oil, avocado oil, shea butter, beeswax and PE98 liquid crystal emulsifier into squalane, heating to 60-65 deg.C under stirring, dissolving completely, and heating to obtain phase A;
adding xanthan gum into glycerol, stirring for dispersing, adding essential oil and deionized water, heating in water bath, stirring to 70-75 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B;
adding the phase A into the phase B, maintaining the temperature at 70-75 ℃, homogenizing at a medium speed, stirring for 5-6min, and then cooling to room temperature to prepare a hexagonal phase structure liquid crystal type emulsion;
the essential oil is mixed into the phase A, the phase B or the phase AB mixed phase.
The above essential oils are mixed into phase B.
The speed of the medium-speed homogeneous stirring is 4000 to 5000r/min.
The heating mode in the step 1) comprises the following steps: heating in water bath, and directly heating.
Further, the heating mode in the step 1) is water bath heating.
The temperature reduction mode in the step 3) comprises the following steps: standing, stirring at low speed, and stirring in cold water bath at low speed.
Further, the temperature in the step 3) is lowered by standing.
The invention has the advantages that:
according to the liquid crystal type hand cream containing the essential oil and the preparation method thereof, parameters such as constant homogenizing speed, time, heating temperature and the like form a liquid crystal type with a hexagonal phase structure in a hand cream emulsion with a certain formula, and the quantity and the crystal form of crystals formed in the hand cream emulsion are adjusted through different essential oil adding modes and temperature reduction processes, so that the body feeling of the hand cream emulsion is adjusted.
Compared with the lamellar liquid crystal formed in the liquid crystal product, the liquid crystal with the hexagonal phase structure has the following advantages:
1) The hexagonal liquid crystal structure has more water content than lamellar liquid crystal, has stronger moisturizing performance, is suitable for various skin types, and is particularly suitable for dry skin;
2) The hexagonal phase liquid crystal structure is more stable in a system with higher water content than the lamellar crystal structure;
3) The hexagonal liquid crystal has better biocompatibility, can improve the stability of the essential oil, prolong the release time of the essential oil, ensure that the essential oil is slowly and efficiently absorbed by the skin, and realize the activity effect to the maximum extent;
4) The emulsion system of the hexagonal liquid crystal has moderate viscosity, easy dispersion, good transdermal absorption of nutrient substances and maximum exertion of the product efficacy.
The liquid crystal hand cream has good spreadability and air permeability, the body feeling is smoother due to the fact that a liquid crystal layer structure slides on the surface of the skin, the number of white stripes of the liquid crystal hand cream is obviously less than that of a common hand cream in the smearing process, the liquid crystal hand cream is completely absorbed within 3min after the product is smeared, and the liquid crystal hand cream has an excellent moistening effect and is quick-drying after being smeared. The liquid crystal structure can slowly release the essential oil, can avoid volatilization of effective components of the hand cream, can also avoid the phenomenon that the essential oil is too fast permeated into the skin to cause discomfort of the skin, and in addition, the addition of the essential oil can well condition the skin and play an active role.
Drawings
FIG. 1 is a photograph of the emulsion prepared in example 1 in bright and dark fields of a polarizing microscope (FIG. a is a photograph of a liquid crystal structure at 200 times in dark field, and FIG. b is a photograph of an emulsification system structure at 600 times in bright field).
FIG. 2 is a photograph of the emulsion prepared in example 2 in bright and dark fields of a polarizing microscope (FIG. c is a photograph of a liquid crystal structure at 200 times in dark field, and FIG. d is a photograph of an emulsification system structure at 600 times in bright field).
FIG. 3 is a bright field and dark field photograph of the emulsion prepared in example 3 under a polarizing microscope (FIG. e is a photograph of a liquid crystal structure at 200 times under a dark field, and FIG. f is a photograph of an emulsification system structure at 600 times under a bright field).
FIG. 4 is a photograph of the emulsion prepared in example 4 in bright and dark fields of a polarizing microscope (FIG. g is a photograph of a liquid crystal structure at 200 times in dark field, and FIG. h is a photograph of an emulsification system structure at 600 times in bright field).
FIG. 5 is a photograph of the emulsion prepared in example 5 in bright and dark fields of a polarizing microscope (FIG. m is a photograph of a liquid crystal structure at 200 times in the dark field, and FIG. n is a photograph of an emulsification system structure at 600 times in the bright field).
FIG. 6 is a photograph of the emulsion prepared in example 6 in bright and dark fields of a polarization microscope (FIG. p is a photograph of a liquid crystal structure at 200 times under dark field, and FIG. q is a photograph of an emulsification system structure at 600 times under bright field).
FIG. 7 is a bright field and dark field photograph of the emulsion prepared in comparative example 1 in a polarizing microscope (FIG. s is a photograph of a liquid crystal structure at 200 times in the dark field, and FIG. t is a photograph of an emulsification system structure at 600 times in the bright field).
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
A liquid crystal type hand cream containing essential oil comprises, by mass, 10% of squalane, 2% of shea butter, 3% of sweet almond oil, 2% of avocado oil, 4% of PE98 liquid crystal emulsifier, 0.5% of beeswax, 0.5% of xanthan gum, 9% of glycerol, 1.8% of essential oil and deionized water.
The preparation method comprises the following steps:
1) Adding sweet almond oil, avocado oil, shea butter, beeswax and PE98 liquid crystal emulsifier into squalane, heating to 60-65 deg.C under stirring, dissolving completely, and heating to obtain phase A;
the heating mode can adopt water bath heating and direct heating, and preferably adopts water bath heating.
2) Adding xanthan gum into glycerol, stirring for dispersing, adding essential oil and deionized water, heating in water bath, stirring to 70-75 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B;
3) Adding the phase A into the phase B, maintaining the temperature of 70-75 ℃, uniformly stirring at a medium speed of 4000-5000 r/min for 5-6min, and then cooling to room temperature to prepare a liquid crystal type emulsion with a hexagonal phase structure;
the temperature reduction method can be selected from standing, low-speed stirring, and low-speed stirring in cold water bath, preferably standing temperature reduction.
The essential oil is mixed into the phase A, the phase B or the phase AB.
Example 1
1) Adding sweet almond oil, avocado oil, shea butter, beeswax and PE98 liquid crystal emulsifier into squalane, heating in water bath to 60 deg.C under stirring, dissolving completely, and heating while maintaining the temperature to obtain phase A.
2) Adding xanthan gum into glycerol, stirring for dispersion, adding essential oil, adding deionized water, heating in water bath under stirring to 70 deg.C, and keeping the temperature and heating to obtain phase B.
3) Adding the phase A into the phase B, maintaining the temperature at 70 ℃, homogenizing at a medium speed, stirring for 5min, and then standing and cooling to room temperature to prepare a hexagonal phase structure liquid crystal type emulsion; the medium-speed homogeneous stirring speed is 4000r/min.
As shown in FIG. 1, the prepared hexagonal phase structure liquid crystal type emulsion is photographed in bright field and dark field of a polarizing microscope, wherein a is a photograph of a liquid crystal structure 200 times under dark field, and b is a photograph of an emulsification system structure 600 times under bright field.
And (3) performance detection:
| index name | Index requirement | Product(s) |
| Color | Milky white color | Light yellow |
| Fragrance | Meets the requirements of regulated odor type | Meets the requirements |
| Paste body | Fine, smooth and uniform | Qualified |
| Heat resistance | Keeping the temperature at (40 +/-1) ℃ for 24h, and recovering the room temperature without oil-water separation | Without oil-water stratification |
| Cold-resistant | Keeping the temperature at (-8 +/-2) DEG C for 24h, and having no obvious character difference after recovering the room temperature and before the experiment | Without obvious change |
| Degree of centrifugation | 2000r/min, centrifuging for 1h, and observing whether layering, emulsion breaking and other phenomena exist | No delamination, emulsion breaking display |
Yellowing of the product may be due to deterioration of the essential oil, as the deterioration of the raw material may cause a change in the appearance of the product.
Sensory detection:
therefore, the essential oil in the implementation is added into the phase B, and the prepared emulsion has small liquid crystal structure and more liquid crystal structures. Has good body feeling and use effect, and has balanced and excellent glossiness, transparency, spreadability, absorbability, greasy feeling, white stripes, air permeability and light texture.
Example 2
1) Adding sweet almond oil, avocado oil, shea butter, beeswax, PE98 liquid crystal emulsifier and essential oil into squalane, heating to 65 deg.C under stirring, dissolving completely, and heating to obtain phase A.
2) Adding xanthan gum into glycerol, stirring for dispersion, adding deionized water, heating in water bath, stirring to 75 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B.
3) Adding the phase A into the phase B, maintaining the temperature at 75 ℃, homogenizing at a medium speed, stirring for 6min, and then standing and cooling to room temperature to prepare a liquid crystal type emulsion with a hexagonal phase structure; the medium-speed homogenizing and stirring speed is 5000r/min.
As shown in FIG. 2, the prepared hexagonal phase structure liquid crystal type emulsion is photographed in bright field and dark field of a polarizing microscope, wherein, a photograph c is a photograph of a liquid crystal structure 200 times under dark field, and a photograph d is a photograph of an emulsification system structure 600 times under bright field.
And (3) performance detection:
| index name | Index requirement | Product(s) |
| Color | Milky white color | Light yellow |
| Fragrance | Meets the requirements of regulated odor type | Meets the requirements |
| Paste body | Fine, smooth and uniform | Qualified |
| Heat resistance | Keeping the temperature at (40 +/-1) ℃ for 24h, and recovering the room temperature without oil-water separation | Without oil-water stratification |
| Cold-resistant | Keeping the temperature at (-8 +/-2) DEG C for 24h, and having no obvious character difference after recovering the room temperature and before the experiment | Without obvious change |
| Degree of centrifugation | 2000r/min, centrifuging for 1h, and observing whether layering, emulsion breaking and other phenomena exist | No delamination, emulsion breaking display |
Yellowing of the product may be due to deterioration of the essential oil, as the deterioration of the raw material may cause a change in the appearance of the product.
Sensory detection:
it can be seen that the difference between this embodiment and embodiment 1 is: by adding essential oil to item A, an emulsion is obtained with a smaller number of liquid crystal structures than in the emulsion of example 1. The spreading property and the burden (light feeling) are improved correspondingly by the reduction in the number of liquid crystal structures as compared with the emulsion of example 1 in the body feeling, while the greasy feeling is enhanced and the air permeability is reduced.
Example 3
1) Adding sweet almond oil, avocado oil, shea butter, beeswax and PE98 liquid crystal emulsifier into squalane, heating to 65 deg.C under stirring, dissolving completely, and heating to obtain phase A.
2) Adding xanthan gum into glycerol, stirring for dispersion, adding deionized water, heating in water bath, stirring to 70 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B.
3) And (3) after the phase A and the phase B reach the required temperature respectively, adding the phase A into the phase B, maintaining the temperature at 705 ℃, firstly homogenizing and stirring at low speed for 3min, then adding essential oil (phase C), homogenizing at high speed for 3min, and then standing and cooling to room temperature to obtain the liquid crystal type emulsion with the hexagonal phase structure.
The high-speed homogenizing stirring speed is 6000r/min, and the low-speed stirring speed is 3000r/min.
As shown in FIG. 3, the prepared hexagonal phase structure liquid crystal type emulsion is photographed in bright field and dark field of a polarizing microscope, wherein a photograph e is a photograph of a liquid crystal structure 200 times under dark field, and a photograph f is a photograph of an emulsification system structure 600 times under bright field.
It can be seen that the difference between this embodiment and embodiments 1 and 2 is: the essential oil is the last phase added. The liquid crystal structure and number were slightly inferior to those of examples 1, 2, 4, and 5, but better than that of example 6. The appearance is that the transparency is improved in body feeling, but the white stripes are increased, the absorption capacity of the skin is weakened, the greasy feeling is enhanced, and the air permeability is poor.
And (3) performance detection:
| index name | Index requirement | Product(s) |
| Color | Milky white color | Milky white color |
| Fragrance | Meets the requirements of regulated odor type | Meets the requirements |
| Paste body | Fine, smooth and uniform | Qualified |
| Heat resistance | Keeping the temperature at (40 +/-1) ℃ for 24h, and recovering the room temperature without oil-water separation | Without oil-water stratification |
| Cold-resistant | Keeping the temperature at (-8 +/-2) DEG C for 24h, and no obvious character difference exists between the room temperature and the room temperature before the experiment | Without obvious change |
| Degree of centrifugation | 2000r/min, centrifuging for 1h, and observing whether layering, emulsion breaking and other phenomena exist | No delamination, emulsion breaking display |
Yellowing of the product may be due to deterioration of the essential oil, as the deterioration of the raw material may cause a change in the appearance of the product.
Sensory detection:
example 4
1) Adding sweet almond oil, avocado oil, shea butter, beeswax and PE98 liquid crystal emulsifier into squalane, heating in water bath to 65 deg.C under stirring, dissolving completely, and heating to obtain phase A.
2) Adding xanthan gum into glycerol, stirring for dispersing, adding deionized water, heating in water bath, stirring to 75 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B.
3) Adding essential oil (phase C) into phase A, and slightly stirring.
4) Adding the phase A into the phase B, maintaining the temperature at 75 ℃, homogenizing at a medium speed, stirring for 5min, then stirring at a low speed, and cooling to room temperature to obtain a liquid crystal type emulsion with a hexagonal phase structure; the speed of the medium-speed homogenizing and stirring is 4500r/min, and the speed of the low-speed homogenizing and stirring is 100r/min.
As shown in FIG. 4, the prepared hexagonal phase structure liquid crystal type emulsion is photographed in bright field and dark field of a polarizing microscope, wherein a picture g is a photograph of a liquid crystal structure 200 times under dark field, and a picture h is a photograph of an emulsification system structure 600 times under bright field.
And (3) performance detection:
yellowing of the product may be due to deterioration of the essential oil, as the deterioration of the raw material may cause a change in the appearance of the product.
Sensory detection:
the essential oils in this example were added to phase A as in example 1, in the same order of addition, and mixed and then cooled to room temperature by low speed stirring.
The appearance was decreased spreadability and air permeability in body feeling compared to the emulsion of example 1.
Example 5
1) Adding sweet almond oil, avocado oil, shea butter, beeswax and PE98 liquid crystal emulsifier into squalane, heating in water bath to 65 deg.C under stirring, dissolving completely, and heating to obtain phase A.
2) Adding xanthan gum into glycerol, stirring for dispersing, adding deionized water, heating in water bath, stirring to 75 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B.
3) Adding the essential oil into the phase A again, and slightly stirring and uniformly mixing.
4) And adding the phase A into the phase B, maintaining the temperature at 75 ℃, homogenizing at a medium speed, stirring for 6min, and then standing and cooling to room temperature to obtain the liquid crystal type emulsion with the hexagonal phase structure.
The medium-speed homogenizing and stirring speed is 4500r/min.
As shown in FIG. 5, in order to take photographs of the hexagonal phase structure liquid crystal type emulsion prepared in bright field and dark field of a polarizing microscope, the picture m is a photograph of the liquid crystal structure 200 times in the dark field, and the picture n is a photograph of the emulsification system structure 600 times in the bright field.
And (3) performance detection:
| index name | Index requirement | Product(s) |
| Color | Milky white color | Light yellow |
| Fragrance | Meets the requirements of regulated odor type | Meets the requirements |
| Paste body | Fine, smooth and uniform | Qualified |
| Heat resistance | Keeping the temperature at (40 +/-1) ℃ for 24h, and recovering the room temperature without oil-water separation | Without oil-water stratification |
| Cold-resistant | Keeping the temperature at (-8 +/-2) DEG C for 24h, and having no obvious character difference after recovering the room temperature and before the experiment | Without obvious change |
| Degree of centrifugation | 2000r/min, centrifuging for 1h, and observing whether layering, emulsion breaking and other phenomena exist | No delamination, emulsion breaking display |
Yellowing of the product may be due to deterioration of the essential oil, as the deterioration of the raw material may cause a change in the appearance of the product.
Sensory detection:
the essential oil in this example was added to the same as in example 4, and the temperature drop pattern in step 4) was changed to the same standing as in example 1, unlike example 4.
The amount of liquid crystal in this example was increased as compared with the emulsion in example 4. The appearance of the emulsion is that the transparency, the spreadability, the absorbability, the greasiness and the air permeability are improved in the body sense, so that the temperature drop mode has great influence on the formation of liquid crystal and has certain influence on the use property of the emulsion.
Example 6
1) Adding sweet almond oil, avocado oil, shea butter, beeswax and PE98 liquid crystal emulsifier into squalane, heating in water bath to 65 deg.C under stirring, dissolving completely, and heating to obtain phase A.
2) Adding xanthan gum into glycerol, stirring for dispersing, adding deionized water, heating in water bath, stirring to 75 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B.
3) Adding essential oil into the phase A after the phase A and the phase B reach the required temperature respectively, and slightly stirring and uniformly mixing.
4) Adding the phase A into the phase B, maintaining the temperature at 75 ℃, homogenizing at a medium speed, stirring for 6min, then stirring at a medium speed in a normal temperature water bath, and cooling to room temperature to obtain a liquid crystal type emulsion with a hexagonal phase structure; the speed of the medium-speed homogeneous stirring is 4500r/min.
The low-speed homogenizing and stirring speed is 50-100 r/min.
As shown in FIG. 6, the prepared hexagonal phase structure liquid crystal type emulsion is photographed in bright field and dark field of a polarizing microscope, wherein a picture p is a photograph of a liquid crystal structure 200 times under dark field, and a picture q is a photograph of an emulsification system structure 600 times under bright field.
And (3) performance detection:
| index name | Index requirement | Product(s) |
| Color | Milky white color | Light yellow |
| Fragrance | Meets the requirements of regulated odor type | Meets the requirements |
| Paste body | Fine, smooth and uniform | Qualified |
| Heat resistance | Keeping the temperature at (40 +/-1) ℃ for 24h, and recovering the room temperature without oil-water separation | Without oil-water stratification |
| Cold-resistant | Keeping at (-8 + -2) deg.C for 24h, and mixing with the filtrate after recovering to room temperatureNo obvious character difference before test | Without obvious change |
| Degree of centrifugation | 2000r/min, centrifuging for 1h, and observing whether layering, emulsion breaking and other phenomena exist | No delamination, emulsion breaking display |
Yellowing of the product may be due to deterioration of the essential oil, as the deterioration of the raw material may cause a change in the appearance of the product.
Sensory detection:
the essential oil in this example was added in the same manner as in example 4, but the temperature drop in step 4) was changed to cold water bath low-speed stirring and dropping, and as a result, the number of liquid crystals was significantly reduced, and the liquid crystals were not distributed uniformly and varied in size, unlike in example 4.
Compared with the emulsion of example 4, the emulsion exhibited a reduced absorbability in body feeling, improved greasy feeling, white streaks, and reduced light texture.
Comparative example 1
1) Adding sweet almond oil, avocado oil, shea butter, beeswax, and PE98 liquid crystal emulsifier into squalane, heating in water bath under stirring to 70 deg.C, dissolving completely, adding essential oil, and heating to 88 deg.C to obtain phase A.
2) Adding xanthan gum into glycerol, stirring for dispersing, adding deionized water, heating in water bath, stirring to 88 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B.
3) Adding the phase A into the phase B, keeping the temperature at 88 ℃, uniformly stirring for 15min at the rotating speed of 3000-4000 r/min, then cooling to 50-55 ℃, and uniformly stirring for 5min at the rotating speed of 1000-1500 r/min to prepare the lamellar structure liquid crystal type emulsion.
As shown in FIG. 7, the prepared emulsion is photographed in bright field and dark field of a polarization microscope, wherein a picture s is a photograph of a liquid crystal structure at 200 times under dark field, and a picture t is a photograph of an emulsification system structure at 600 times under bright field.
The process parameters used in this comparative example did not result in a corresponding liquid crystal structure.
And (3) performance detection:
| index name | Index requirement | Product(s) |
| Color | Milky white color | Milky white color |
| Fragrance | Meets the requirements of the regulated odor type | Meets the requirements |
| Paste body | Fine, smooth and uniform | Qualified |
| Heat resistance | Keeping the temperature at (40 +/-1) ℃ for 24h, and recovering the room temperature without oil-water separation | No oil stratification by water |
| Cold-resistant | Keeping the temperature at (-8 +/-2) DEG C for 24h, and having no obvious character difference after recovering the room temperature and before the experiment | Without obvious change |
| Degree of centrifugation | 2000r/min, centrifuging for 1h, and observing whether layering, emulsion breaking and other phenomena exist | Without the phenomena of layering, emulsion breaking and the like |
Sensory detection:
the raw materials used in the invention are as follows:
the squalane can endow the emulsion with good sunscreen effect, wherein the squalane is nonpolar oil and is easy to form a liquid crystal film with a uniform structure at an oil-water interface when contacting with a water phase. The squalane is derived from olive oil, and is a natural skin caring oil. Has good oxidation resistance and thermal stability. Squalane is a lipid closest to sebum of a human body, has strong affinity, can be integrated with the skin lipid membrane of the human body, forms a natural barrier on the surface of the skin, can inhibit the peroxidation of skin lipid, can effectively permeate into the skin, promotes the proliferation of skin basal cells, and has obvious physiological effects on delaying skin aging, improving and eliminating chloasma; squalane can also open skin pores, promote blood circulation, promote cell metabolism, and help repair damaged cells.
Shea butter is a pure natural green plant source solid oil, can promote epidermal cell regeneration, and has skin nutrition effect. The shea butter has the indexes close to those of sebum secretion oil of human body, contains rich non-saponification components, is easy to be absorbed by human body, can prevent drying and cracking, and further recovers and maintains the natural elasticity of skin. Also has anti-inflammatory effect.
Sweet almond oil, a neutral base oil. Has regulating effect on pimple skin, and protecting sensitive skin of rich hand. It can be blended with any vegetable oil, has good skin-friendly property, light and soft texture, and is moistened without greasiness, and also has effect of isolating ultraviolet rays.
Avocado (avocado) pear oil has moisturizing and lipid properties, contains a relatively high amount of vitamin D, and is suitable for dry, fragile, sunburn and swollen skin, and increases skin elasticity, water loss and lack of elasticity. Is suitable for neutral and dry skin and mixed dry skin. The avocado oil added into the base oil can enhance the effect of skin on absorbing essential oil, and is a good natural antioxidant. And has good permeability and improved skin elasticity.
Beeswax (beeswax), the main chemical components include: esters (70% -72%) formed from alkanol and alkanoic acid, free fatty acid (14% -15%), hydrocarbons (12%) mainly containing saturated hydrocarbon, and also partial free fatty alcohols, water and minerals, and small amount of flavonoids, vitamins and pigments. Has the functions of active ammonia removal, bacteriostasis and corrosion prevention, and has the characteristics of natural good adhesion, permeability, emulsibility, smoothness and the like.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalents or equivalent changes fall within the protection scope of the present invention.
Claims (8)
1. The liquid crystal type hand cream containing essential oil is characterized by comprising, by mass, 10% of squalane, 2% of shea butter, 3% of sweet almond oil, 2% of avocado oil, 4% of PE98 liquid crystal emulsifier, 0.5% of beeswax, 0.5% of xanthan gum, 9% of glycerol, 1.8% of essential oil and deionized water.
2. The method for preparing a hand cream according to claim 1, characterized by comprising the steps of:
adding sweet almond oil, avocado oil, shea butter, beeswax and PE98 liquid crystal emulsifier into squalane, heating to 60-65 deg.C under stirring, dissolving completely, and heating to obtain phase A;
adding xanthan gum into glycerol, stirring for dispersing, adding essential oil and deionized water, heating in water bath, stirring to 70-75 deg.C, dissolving completely, and heating while maintaining the temperature to obtain phase B;
adding the phase A into the phase B, homogenizing and stirring at a medium speed of 70-75 ℃ for 5-6min, and then cooling to room temperature to prepare a liquid crystal type emulsion with a hexagonal phase structure;
the essential oil is mixed into the phase A, the phase B or the phase AB mixed phase.
3. The method of claim 2, wherein the essential oil is mixed into phase B.
4. The preparation method according to claim 2, wherein the medium-speed homogeneous stirring speed is 4000 to 5000r/min.
5. The method according to claim 2, wherein the heating in step 1) comprises: heating in water bath, and directly heating.
6. The method according to claim 5, wherein the heating in step 1) is performed by water bath heating.
7. The method according to claim 2, wherein the step 3) comprises the following steps: standing, stirring at low speed, and stirring in cold water bath at low speed.
8. The method according to claim 7, wherein the temperature in the step 3) is lowered by standing.
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