Spinning solution, fibrous membrane and preparation method and application thereof

Abstract

The invention discloses a spinning solution, a fiber membrane and a preparation method and application thereof, and belongs to the technical field of beauty and skin care. The spinning solution is composed of polyvinyl butyral, vitamin E and a solvent, and according to the fiber membrane prepared through electrostatic spinning of the spinning solution, the oxidation resistance and moisture retention of vitamin E can be brought into full play, the utilization rate of vitamin E is increased, and the oxidation resistance effect and the moisture retention effect of the fiber membrane are enhanced.

Description

Technical Field

[0001] This application relates to the technical field of beauty and skin care, and more particularly, to a spinning solution, a fiber membrane, a preparation method thereof, and an application thereof. Background Art

[0002] Electrospinning technology has become one of the main ways to effectively prepare nanofiber materials due to its advantages such as simple manufacturing equipment, low spinning cost, a wide variety of spinnable substances, and controllable processes, and has good application prospects in the fields of biomedicine, filtration and protection, catalysis, energy, optoelectronics, food engineering, cosmetics, etc.

[0003] For example, when applied to the cosmetics field, generally, a spinning solution (also known as a facial mask solution) is electrospun into a nanofiber membrane using electrospinning equipment. Polymers are usually added to the spinning solution to form a film, and functional substances with characteristics such as antioxidant or moisturizing properties are also added to increase the functions of the fiber membrane.

[0004] However, after the current spinning solution is electrospun into a nanofiber membrane using electrospinning equipment, it will inhibit the exertion of the functional characteristics of the functional substances such as antioxidant and moisturizing properties, resulting in poor antioxidant and moisturizing effects of the nanofiber membrane. Summary of the Invention

[0005] Based on the above deficiencies, this application provides a spinning solution, a fiber membrane, a preparation method thereof, and an application thereof to improve the problem that antioxidant and moisturizing properties cannot be fully exerted in related technologies.

[0006] This application is implemented as follows:

[0007] In a first aspect, an example of this application provides a spinning solution, which is composed of polyvinyl butyral, vitamin E, and a solvent.

[0008] In the above implementation process, the spinning solution is composed of polyvinyl butyral and vitamin E dissolved in a solvent. Through the mutual cooperation of polyvinyl butyral and vitamin E, the antioxidant and moisturizing properties of vitamin E can be fully exerted in the fiber membrane obtained by electrospinning the spinning solution subsequently. In the spinning solution composed of polyvinyl butyral, vitamin E, and a solvent, if other functional substances are added or polyvinyl butyral is replaced with other polymers, the moisturizing and antioxidant properties of vitamin E will be affected.

[0009] Combined with the first aspect, in an optional implementation manner of this application, in the spinning solution, the mass percentage of polyvinyl butyral is 5%-15%.

[0010] Combined with the first aspect, in an optional implementation manner of this application, in the spinning solution, the mass percentage of vitamin E does not exceed 5%.

[0011] In the above implementation process, the mass percentage of polyvinyl butyral is 5%-15%, and the mass percentage of vitamin E does not exceed 5%. This can make the spinning solution have good film-forming properties and also fully exert the moisturizing and antioxidant properties of vitamin E in the fiber membrane prepared by electrospinning.

[0012] Combined with the first aspect, in an alternative embodiment of the present application, the solvent is selected from at least one of ethanol, isopropanol, n-butanol, and pentanol.

[0013] In the above implementation process, using one or more of ethanol, isopropanol, n-butanol, and pentanol as the solvent for polyvinyl butyral and vitamin E can obtain a uniformly mixed spinning solution, improving the stability of the electrospinning process and the final film-forming effect.

[0014] In the second aspect, an example of the present application provides a method for preparing a fiber membrane. The preparation method includes:

[0015] Performing electrospinning on the spinning solution provided in the first aspect to obtain a fiber membrane.

[0016] In the above implementation process, electrospinning the spinning solution composed of polyvinyl butyral, vitamin E, and a solvent provided in the first aspect, the combination of polyvinyl butyral and vitamin E in the spinning solution can obtain a fiber membrane with good film-forming properties, antioxidant properties, and moisturizing properties after electrospinning.

[0017] Combined with the second aspect, in an alternative embodiment of the present application, the method for electrospinning the spinning solution includes:

[0018] Placing the spinning solution in the liquid storage device of a portable electrospinning device to prepare a fiber membrane at a target position.

[0019] Optionally, the target position is the skin surface.

[0020] In the above implementation process, using a portable electrospinning device to electrospin the spinning solution can directly prepare a fiber membrane on the skin surface such as the face. The fiber membrane has good film-forming properties, antioxidant properties, and moisturizing properties, has a high utilization rate of the functional ingredient vitamin E, is prepared immediately for use, and can avoid the problems of deterioration and transfer caused by prefabricated facial masks, making it convenient to use.

[0021] Combined with the second aspect, in an alternative embodiment of the present application, the parameters of electrospinning include: the electrospinning voltage is 4-20 kV, the electrospinning distance is 3-18 cm, and the jet flow rate is 10-600 μL / min.

[0022] In the above implementation process, an electrospinning solution provided by the first aspect is electrospun using a portable electrospinning device at a spinning voltage of 4 - 20 kV, a spinning distance of 3 - 18 cm, and a jet flow rate of 10 - 600 μL / min. The electrospinning solution has good film-forming properties, which can fully exert the antioxidant and moisturizing properties of vitamin E, enabling the fiber membrane to have good antioxidant and moisturizing effects.

[0023] In the third aspect, an example of the present application provides a fiber membrane prepared according to the preparation method provided by the second aspect.

[0024] In the above implementation process, the fiber membrane prepared according to the preparation method provided by the second aspect has good antioxidant and moisturizing effects.

[0025] Combined with the third aspect, in an alternative embodiment of the present application, the scavenging rate of the fiber membrane for free radicals is not less than 90%.

[0026] In the above implementation process, the scavenging rate of the fiber membrane for free radicals is not less than 90%, having good antioxidant effects.

[0027] In the fourth aspect, an example of the present application provides an application of a fiber membrane in a facial mask.

[0028] In the above implementation process, the fiber membrane prepared according to the preparation method provided by the second aspect has good antioxidant and moisturizing effects and a high utilization rate of vitamin E. Moreover, compared with traditional facial mask fabrics, the fiber membrane prepared by electrospinning has smaller fiber pore sizes and higher porosity, can effectively retain the moisture required by human skin, and improve the antioxidant capacity of human skin, achieving the effects of moisturizing and preventing skin aging. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0030] Figure 1 It is a comparison chart of the free radical scavenging rate provided by a test example of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will describe the implementation solutions of the present application in detail in combination with the embodiments. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present application and should not be regarded as limiting the scope of the present application. For those not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. For the reagents or instruments not specified for the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0032] Facial masks are one of the most widely used personal care products, which can prevent moisture evaporation and accelerate the penetration and absorption of nutrients.

[0033] Currently, conventional facial masks are applied by matching a base fabric with essence. The base fabric is usually non-woven fabric. However, due to the nature of its material, non-woven fabric has relatively thick fibers and large pore sizes, resulting in a poor wrapping and fitting experience. Moreover, traditional facial masks form prefabricated facial masks by adding essence to the base fabric, which causes many problems during use. For example, the nutrients in the essence are prone to deterioration, losing their effectiveness; at the same time, the nutrient solution directly accumulates on the skin surface, unable to achieve the slow release of active ingredients and being unfavorable for skin absorption. Additionally, facial masks in the state of adsorbing the nutrient solution are difficult to unfold and cannot be accurately attached to the user's face, affecting the user's experience.

[0034] Electrospun fiber membranes have small fiber pore sizes and high porosity. Their good air permeability does not affect the normal breathing of the skin, while isolating external pollutants. The membranes are thin and have a uniform texture, capable of highly conforming to the human face and being convenient to use.

[0035] To meet the changing needs of people for skin care products, the inventors have tried to prepare facial masks using the electrospinning process.

[0036] When preparing fiber membranes through the electrospinning process, polymers facilitating film formation and functional substances capable of exerting functions need to be added to the spinning solution. Vitamin E has antioxidant and moisturizing properties and is usually added as a functional substance to the spinning solution.

[0037] However, the inventors have found that in the spinning solutions of the prior art, the polymers and other functional additives in the spinning solution will affect the exertion of the antioxidant and moisturizing properties of vitamin E, resulting in a low utilization rate of vitamin E.

[0038] Therefore, the examples of this application provide a spinning solution to improve the exertion degree of the antioxidant and moisturizing properties of vitamin E and increase the utilization rate of vitamin E.

[0039] The spinning solution provided by the examples of this application is composed of polyvinyl butyral, vitamin E, and a solvent.

[0040] In the spinning solution, the combination of polyvinyl butyral and vitamin E can improve the film-forming property of the spinning solution during the electrospinning process, enabling the antioxidant and moisturizing properties of vitamin E in the prepared fiber membrane to be fully exerted, increasing the utilization rate of vitamin E, and enhancing the antioxidant and moisturizing effects of the fiber membrane.

[0041] Since in the spinning solution provided by the examples of the present application, no other functional substances are added except vitamin E, and no other polymers are added except polyvinyl butyral, the antioxidant and moisturizing properties of vitamin E in the fiber membrane can be fully exerted by the combination of polyvinyl butyral and vitamin E.

[0042] For example, if in the spinning solution, in addition to vitamin E, a second functional substance such as hyaluronic acid is added, the exertion degree of the antioxidant and moisturizing properties of vitamin E in the fiber membrane prepared from the spinning solution will be reduced, and the antioxidant and moisturizing effects of the fiber membrane will be weakened.

[0043] For example, if in the spinning solution, other polymers are used to replace polyvinyl butyral, for example, polyacrylonitrile is used to replace polyvinyl butyral, and electrospinning is carried out with a spinning solution composed of polyacrylonitrile, vitamin E and a solvent, in the prepared fiber membrane, the exertion degree of the antioxidant and moisturizing properties of vitamin E is relatively low, and the antioxidant and moisturizing effects of the fiber membrane will be weakened.

[0044] For another example, if in the spinning solution, in addition to polyvinyl butyral and vitamin E, a third spinning component is added, for example, the spinning solution is composed of polyvinyl butyral, polydimethylsiloxane, vitamin E and a solvent, in the fiber membrane prepared by electrospinning the spinning solution, the exertion degree of the antioxidant and moisturizing properties of vitamin E is poor, and the antioxidant and moisturizing effects of the fiber membrane will be weakened.

[0045] The spinning solution provided by the examples of the present application can fully exert the antioxidant and moisturizing properties of vitamin E in the prepared fiber membrane by the combination of polyvinyl butyral and vitamin E, improve the utilization rate of vitamin E, and enhance the antioxidant and moisturizing effects of the fiber membrane.

[0046] The present application does not limit the specific type of the solvent. In one possible embodiment, the solvent can be selected from at least one of ethanol, isopropanol, n-butanol and pentanol.

[0047] Exemplarily, the solvent can be selected from ethanol.

[0048] Furthermore, the present application does not limit the specific ratio of polyvinyl butyral in the spinning solution.

[0049] In one possible embodiment, in the spinning solution, the mass percentage of polyvinyl butyral is 5%-15%.

[0050] The mass percentage of polyvinyl butyral being 5%-15% can improve the spinning film-forming property of the spinning solution, improve the film-forming effect, and improve the exertion degree of the antioxidant and moisturizing properties of vitamin E.

[0051] Exemplarily, the mass percentage of polyvinyl butyral may be one of 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%, or within the range between any two of them.

[0052] Furthermore, the present application does not limit the specific ratio of vitamin E in the spinning solution, and relevant personnel can make corresponding selections according to needs.

[0053] In a possible embodiment, in the spinning solution, the mass percentage of vitamin E does not exceed 5%.

[0054] The mass percentage of vitamin E not exceeding 5% means that the mass percentage of vitamin E is greater than 0 and less than or equal to 5%.

[0055] When the mass percentage of vitamin E does not exceed 5%, the antioxidant and moisturizing properties of vitamin E can be maximally exerted, enhancing the antioxidant and moisturizing effects of the fiber membrane.

[0056] Exemplarily, in the spinning solution, the mass percentage of vitamin E may be one of 0.01%, 0.05%, 0.1%, 0.5%, 1%, 2%, 3%, 4% or 5%, or within the range between any two of them.

[0057] Exemplarily, in the spinning solution, the mass percentage of polyvinyl butyral is 5% and the mass percentage of vitamin E is 0.1%.

[0058] Exemplarily, in the spinning solution, the mass percentage of polyvinyl butyral is 10% and the mass percentage of vitamin E is 5%.

[0059] Exemplarily, in the spinning solution, the mass percentage of polyvinyl butyral is 15% and the mass percentage of vitamin E is 1.1%.

[0060] Furthermore, the present application also provides a method for preparing a spinning solution, including:

[0061] Mix the weighed polyvinyl butyral with a solvent and stir at room temperature until dissolved. Then add the weighed vitamin E, stir and disperse evenly, and let it stand.

[0062] Furthermore, the present application also provides a method for preparing a fiber membrane using the spinning solution.

[0063] The method for preparing the fiber membrane includes:

[0064] Perform electrospinning using the spinning solution to obtain a fiber membrane.

[0065] The present application does not limit the specific electrospinning process, and relevant personnel can make corresponding selections according to needs.

[0066] In a possible embodiment, a portable electrospinning device can be used to perform electrospinning on a spinning solution.

[0067] Using the portable spinning device, a fiber membrane can be directly prepared at the target position. By directly preparing the fiber membrane on the skin surface such as the face and applying it immediately after preparation, the probability of vitamin E in the fiber membrane deteriorating can be reduced, the utilization rate of vitamin E can be increased, the damage to the membrane structure caused by transferring the fiber membrane can be avoided, the fiber membrane can be made to fit the human skin more closely, and the antioxidant and moisturizing effects of the fiber membrane on the human skin can be enhanced.

[0068] Furthermore, the present application does not limit the specific model of the portable spinning device, and relevant personnel can make corresponding selections according to needs.

[0069] Furthermore, the present application does not limit the specific parameters of electrospinning using the portable electrospinning device. In a possible embodiment, the parameters of electrospinning include: the spinning voltage is 4 - 20 kV, the spinning distance is 3 - 18 cm, and the jet flow rate is 10 - 600 μL / min.

[0070] Exemplarily, when using the portable spinning device to perform electrospinning on the spinning solution, the spinning voltage can be adjusted to any one of 4 kV, 5 kV, 6 kV, 7 kV, 8 kV, 9 kV, 10 kV, 11 kV, 12 kV, 13 kV, 14 kV, 15 kV, 16 kV, 17 kV, 18 kV or 19 kV or within the range between any two of them.

[0071] Exemplarily, when using the portable spinning device to perform electrospinning on the spinning solution, the spinning distance can be adjusted to any one of 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, 9 cm, 10 cm, 11 cm, 12 cm, 13 cm, 14 cm, 15 cm, 16 cm, 17 cm or 18 cm or within the range between any two of them.

[0072] Exemplarily, when using the portable spinning device to perform electrospinning on the spinning solution, the jet flow rate can be adjusted to any one of 10 μL / min, 20 μL / min, 30 μL / min, 40 μL / min, 50 μL / min, 60 μL / min, 70 μL / min, 80 μL / min, 90 μL / min, 100 μL / min, 200 μL / min, 300 μL / min, 400 μL / min, 500 μL / min or 600 μL / min or within the range between any two of them.

[0073] Exemplarily, when electrospinning a spinning solution using a portable electrospinning device, the spinning voltage can be adjusted to 4 kV, the spinning distance can be adjusted to 3 cm, and the jet flow rate can be adjusted to 10 μL / min.

[0074] Exemplarily, when electrospinning a spinning solution using a portable electrospinning device, the spinning voltage can be adjusted to 20 kV, the spinning distance can be adjusted to 18 cm, and the jet flow rate can be adjusted to 600 μL / min.

[0075] Furthermore, the examples of the present application also provide a fiber membrane prepared according to the above preparation method.

[0076] The fiber membrane provided by the examples of the present application has smaller fiber pore sizes and higher porosities, as well as good antioxidant and moisturizing effects, can effectively retain the moisture required by human skin, and improve the antioxidant capacity of human skin.

[0077] Furthermore, the clearance rate of the fiber membrane provided by the examples of the present application for 1,1-diphenyl-2-picrylhydrazyl is not less than 90%.

[0078] Furthermore, the examples of the present application provide an application of a fiber membrane in a facial mask.

[0079] The fiber membrane provided by the examples of the present application has smaller fiber pore sizes and higher porosities, has good antioxidant and moisturizing effects, can fit well with the human body, can effectively retain the moisture required by human skin, and improve the antioxidant capacity of human skin.

[0080] Furthermore, applying the fiber membrane provided by the examples of the present application to the surface of human skin can increase the skin moisture content by more than 40%.

[0081] The spinning solution and fiber membrane of the present application are further described in detail below in conjunction with examples.

[0082] Example 1

[0083] Example 1 provides a fiber membrane obtained by the following method:

[0084] Preparation of the spinning solution:

[0085] (1) Raw material preparation: Weigh 86% ethanol, 13% polyvinyl butyral, and 1% vitamin E by mass percentage;

[0086] (2) Place the ethanol weighed in step (1) in a beaker;

[0087] (3) Place the polyvinyl butyral weighed in step (1) into the beaker in step (2), and stir at room temperature until completely dissolved;

[0088] (4) Add the vitamin E weighed in step (1) to the beaker in step (3), stir at room temperature until completely dissolved, and let stand to obtain a spinning solution.

[0089] Electrospinning:

[0090] (5) Add the spinning solution prepared in step (4) to a liquid storage device, place the liquid storage device in a portable electrospinning device, turn on the switch, push the liquid storage device, and prepare a nanofiber membrane at a specified position; spinning parameters: spinning voltage is 10 kV, spinning distance is 5 cm, and jet flow rate is 100 μL / min.

[0091] Comparative Example 1

[0092] Comparative Example 1 provides an electrospun fiber membrane, which is different from Example 1 in that: by mass percentage, the spinning solution consists of 87% ethanol and 13% polyvinyl butyral, and does not contain vitamin E.

[0093] Comparative Example 2

[0094] Comparative Example 2 provides an electrospun fiber membrane, which is different from Example 1 in that: by mass percentage, the spinning solution consists of 86% N,N-dimethylformamide, 13% polyacrylonitrile, and 1% vitamin E.

[0095] Comparative Example 3

[0096] Comparative Example 3 provides an electrospun fiber membrane, which is different from Example 1 in that: by mass percentage, the spinning solution consists of 85.7% ethanol, 13% polyvinyl butyral, 1% vitamin E, and 0.3% hyaluronic acid.

[0097] Comparative Example 4

[0098] Comparative Example 4 provides an electrospun fiber membrane, which is different from Example 1 in that: by mass percentage, the spinning solution consists of 80.7% ethanol, 13% polyvinyl butyral, 5% polydimethylsiloxane, 1% vitamin E, and 0.3% hyaluronic acid.

[0099] Test Example

[0100] Perform antioxidant tests and moisturizing efficacy tests on the fiber membranes provided in Example 1 and Comparative Examples 1-4.

[0101] Among them, the antioxidant test method includes:

[0102] 1,1-Diphenyl-2-picrylhydrazyl (DPPH) is a solution for testing free radical scavenging activity. When an antioxidant is present in the DPPH solution, the DPPH free radicals are scavenged, causing the color of the solution to fade. The ability of the sample to scavenge DPPH free radicals can be reflected by the degree of decrease in absorbance (fading color). The stronger the ability of the sample to scavenge DPPH free radicals, the better the antioxidant effect.

[0103] Take 50 mg of each of the fiber membranes provided in Example 1 and Comparative Examples 1-4, and place them separately in 4 mL of 0.1 mmol / L DPPH solution. Let the reaction complete by standing in the dark for 30 min. After the reaction is completed, measure the absorbance of all samples at 517 nm, denoted as A; take 50 mg of each of the fiber membranes provided in Example 1 and Comparative Examples 1-4, and place them separately in 4 mL of absolute ethanol solution. After standing in the dark for 30 min, measure the absorbance of all samples at 517 nm, denoted as A 对照 ; Set 4 mL of 0.1 mmol / L DPPH solution as the blank group, measure the absorbance value of the blank group at 517 nm as the blank, denoted as A 空白 . Calculate the free radical scavenging rate (SC%) according to the following formula:

[0104]

[0105] The test results are as Figure 1 shown.

[0106] Among them, the test method for the moisturizing effect includes:

[0107] Clean the inner side of the forearm of both hands before the experiment. Randomly set a test area of 3 cm x 3 cm on the inner sides of the left and right arms, with at least 1 cm interval between each test area. Use a capacitance method skin moisture tester to measure each area 3 times, and calculate the initial value of the skin moisture content of each test area on average; soak different samples in physiological saline for 10 min and then take them out, and apply them to the test areas on the inner sides of the left and right arms. After applying for 20 min, remove the samples, and immediately use a capacitance method skin moisture tester to measure the skin moisture content of the test area and the control area. Measure each area 3 times, and calculate the skin moisture content after removing the samples of each test area on average. The control area is not applied with the sample, denoted as the blank control.

[0108] The test results are shown in Table 1.

[0109] Table 1

[0110]

[0111] Result analysis:

[0112] From Figure 1It can be seen that the free radical scavenging rate of the fiber membrane provided in the example of the present application reaches 99.42%. The free radical scavenging rate of the fiber membrane in Comparative Example 1 is only 32.11%, that in Comparative Example 2 is only 44.14%, that in Comparative Example 3 is only 73.78%, and that in Comparative Example 4 is only 65.45%.

[0113] The results of the free radical scavenging rate test show that by combining polyvinyl butyral with vitamin E in the present application, the antioxidant property of vitamin E can be fully exerted. If polyacrylonitrile is combined with vitamin E, it will affect the exertion of the antioxidant property of vitamin E. Without adding other substances to the spinning solution, the antioxidant property of vitamin E can be fully exerted. If other functional substances are added to the spinning solution, it will affect the exertion of the antioxidant property of vitamin E.

[0114] As shown in Table 1, after applying the fiber membrane for 20 minutes, the skin moisture content reaches 55.2%, which is higher than 12.2% of the blank control group, 37.4% of Comparative Example 1, 41.6% of Comparative Example 2, 49.8% of Comparative Example 3, and 50.0% of Comparative Example 4. The increase in skin moisture content before and after applying the fiber membrane provided in Example 1 is 41.8%, and the increased value is much higher than 1.2% of the blank control group, 23.8% of Comparative Example 1, 22.2% of Comparative Example 2, 34.6% of Comparative Example 3, and 27.3% of Comparative Example 4.

[0115] The results of the skin moisture content test show that by combining polyvinyl butyral with vitamin E in the present application, the moisturizing property of vitamin E can be fully exerted. If polyacrylonitrile is combined with vitamin E, it will affect the exertion of the moisturizing property of vitamin E. Without adding other substances to the spinning solution, the moisturizing property of vitamin E can be fully exerted. If other functional substances are added to the spinning solution, it will affect the exertion of the moisturizing property of vitamin E.

[0116] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A spinning solution, characterized in that, The spinning solution is composed of polyvinyl butyral, vitamin E and a solvent.

2. The spinning solution according to claim 1, wherein, In the spinning solution, the mass percentage of the polyvinyl butyral is 5% - 15%.

3. The spinning solution according to claim 1, characterized in that, In the spinning solution, the mass percentage of the vitamin E does not exceed 5%.

4. The spinning solution according to claim 1, wherein, The solvent is selected from at least one of ethanol, isopropanol, n-butanol and pentanol.

5. A method for preparing a fiber membrane, characterized in that, The preparation method includes: Electrospinning is carried out using the spinning solution according to any one of claims 1 - 4 to obtain the fiber membrane.

6. The preparation method according to claim 5, wherein, The method for electrospinning the spinning solution includes: Placing the spinning solution in the liquid storage device of a portable electrospinning device to prepare the fiber membrane at a target position; Optionally, the target position is the skin surface.

7. The preparation method according to claim 6, characterized in that, The parameters of electrospinning include: the spinning voltage is 4 - 20 kV, the spinning distance is 3 - 18 cm, and the jet flow rate is 10 - 600 μL / min.

8. A fiber membrane, characterized in that, Prepared according to the preparation method of any one of claims 5 - 7.

9. The fiber membrane according to claim 8, wherein, The scavenging rate of the fiber membrane for free radicals is not less than 90%.

10. Use of the fiber membrane according to claim 8 or 9 in a facial mask.

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