Self-generating micro-current gel mask base material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of masks, in particular to a self-generating micro-current gel mask base material as well as a preparation method and application thereof. The invention discloses a self-generating micro-current gel mask base material. The self-generating micro-current gel mask base material comprises composite piezoelectric gauze and gel fiber nets arranged on the two faces of the composite piezoelectric gauze. The composite piezoelectric gauze is formed by weaving warp yarns made of composite piezoelectric yarns and weft yarns made of cotton yarns; and the gel fiber net is formed by spunlace of sodium carboxymethyl cellulose fibers. A base material of the self-generating micro-current gel mask is prepared from a gel fiber net and composite piezoelectric gauze through a spunlace process, the piezoelectric mask with a force-electricity response characteristic is prepared from the composite piezoelectric gauze, and mechanical stress generated by skin shaking is used for inducing the piezoelectric fiber surface to generate charges; and after a gel fiber net formed by the sodium carboxymethyl cellulose fiber absorbs the essence, the gel fiber net has the advantages of excellent biocompatibility and biodegradability.

Description

Technical Field

[0001] The invention relates to the technical field of facial masks, and in particular to a self-generated micro-current gel facial mask substrate and a preparation method and application thereof. Background Art

[0002] Microcurrent has been widely used in the field of medical cosmetology. According to the principle of bioelectricity, the metabolism and all activities of the human body in the life process will generate electricity. The electrocardiogram reflects the electric waves generated by the heartbeat, and the electroencephalogram reflects the brain waves generated by brain activity. Therefore, clinically, diseases are diagnosed by comparing the bioelectric response images under normal conditions. In order to restore the normal bioelectric activity of diseased cells or tissues, in addition to using drug treatment, microcurrents that imitate "bioelectricity" can also be used to promote the conversion of cell ions through activation and accelerate the restoration of normal physiological functions of cells.

[0003] In the field of beauty, the stimulation of microcurrent can expand the gap between cells and tissues, and stimulate cells to promote the synthesis of various energies. Adenosine triphosphate (also called ATP, which is an organic compound containing high-energy phosphate bonds, ATP is the direct source of energy for life activities) increases by 400%, amino acid transport is enhanced, and protein synthesis increases by 3040%. The adherent connective tissue fibers, muscle fibers, and nerve fibers are separated and rearranged after activity, thereby restoring their original biological activity and function, which can tighten the skin, reduce wrinkles, and even remove scars.

[0004] In this technical background, products such as micro-current beauty devices and micro-current facial masks have gradually appeared on the market in recent years. Micro-current beauty devices need to use conductive gel and other ingredients to generate micro-current, which is inconvenient to use. Existing micro-current facial masks on the market need to use an external power supply device to provide current. The power supply is limited, and the appearance of the mask is not beautiful enough. The weight has increased to a certain extent and is not light enough. In addition, this type of micro-current facial mask is also inconvenient in storage and use.

[0005] Compared with traditional piezoelectric materials (quartz crystal, barium titanate, piezoelectric ceramics, etc.), PVDF piezoelectric polymers have the characteristics of light weight, good flexibility, wide frequency response and large dynamic response range. After stretching and polarization treatment, PVDF film shows the strongest piezoelectric properties among polymers.

[0006] The current microcurrent mask has the following disadvantages:

[0007] 1. Micro-current masks with external power supply devices need to use an external power supply device to provide current. The power supply is limited, and the appearance of the mask is not beautiful enough. The weight has increased to a certain extent and is not light enough. In addition, this type of micro-current mask is also inconvenient in storage and use;

[0008] 2. The mask cloth with composite PVDF nanofiber membrane is often made by embedding the nanofiber membrane into the non-woven fabric material through physical or chemical bonding. The mask cloth has a complex structure and a multi-layer structure. It also requires the piezoelectric membrane and the conductive particles to be embedded in fixed grooves. The preparation process is complicated and there is a risk of easy falling off.

[0009] 3. Modified cellulose fiber mask cloth is often made by directly modifying the spunlace cellulose fiber non-woven fabric in an alkaline solution, which will reduce the strength of the modified membrane cloth, and often the liquid absorption and strength cannot be taken into account at the same time.

[0010] To this end, the present application provides a self-generating microcurrent gel mask substrate and a preparation method and application thereof. Summary of the invention

[0011] The present application provides a self-generating microcurrent gel mask substrate, a preparation method and application thereof. The self-generating microcurrent gel mask substrate is made of a gel fiber net and a composite piezoelectric gauze through a hydroentanglement process. The composite piezoelectric gauze is used to make a piezoelectric mask with electromechanical response characteristics. The mechanical stress generated by skin shaking is used to induce the generation of charges on the surface of the piezoelectric fiber. The gel fiber net formed by sodium carboxymethyl cellulose fibers has the advantages of good fit, excellent water absorption, adsorption of skin oil, excellent biocompatibility and biodegradability after absorbing essence.

[0012] The technical solution adopted by this application to solve its technical problem is:

[0013] In a first aspect, the present application provides a self-generating micro-current gel mask substrate, comprising a composite piezoelectric gauze and a gel fiber mesh arranged on both sides of the composite piezoelectric gauze;

[0014] The composite piezoelectric gauze is formed by weaving warp yarns made of composite piezoelectric yarns and weft yarns made of cotton yarns;

[0015] The gel fiber web is formed by hydroentanglement of sodium carboxymethyl cellulose fibers.

[0016] In some embodiments, the composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on a conductive yarn by electrospinning.

[0017] In some embodiments, the conductive yarn is copper-plated polyester yarn, and the mass ratio of polyvinylidene fluoride to potassium sodium niobate piezoelectric ceramic powder on the composite piezoelectric yarn is 85:15.

[0018] In some embodiments, during the electrospinning process, the electrospinning liquid is placed in two spinning needle tubes respectively, and the copper-plated polyester yarn is subjected to conjugate electrospinning. The spinning voltage is 15 kv, the spinning flow rate is 1 mL / h, the spinning nozzle is 15 cm away from the central axis of the copper-plated polyester, and the metal disc speed is 500 RPM; after the electrospinning is completed, a composite piezoelectric yarn is obtained.

[0019] In some embodiments, the composite piezoelectric gauze has a gram weight of 15 g / m 2 .

[0020] In some embodiments, the weight of the gel fiber web is 20-30 g / m 2 .

[0021] In some embodiments, the sodium carboxymethyl cellulose fiber is obtained by modifying Tencel fiber, and the degree of substitution of the sodium carboxymethyl cellulose fiber is 0.2-0.25.

[0022] In some embodiments, the method for preparing the sodium carboxymethyl cellulose fiber comprises the following steps:

[0023] The tencel fiber is treated with alkali solution, then treated with chloroacetic acid solution, separated, neutralized with acid solution, washed and dried in sequence to obtain sodium carboxymethyl cellulose fiber.

[0024] In some embodiments, the temperature of the alkaline solution treatment is 30-40°C; the concentration of the chloroacetic acid solution is 10-15%, and the temperature of the chloroacetic acid solution treatment is 60-80°C.

[0025] In a second aspect, the present application provides a method for preparing a self-generated microcurrent gel mask substrate, comprising the following steps:

[0026] S1. Preparation of composite piezoelectric gauze

[0027] The composite piezoelectric gauze is formed by weaving warp yarn made of composite piezoelectric yarn and weft yarn made of cotton yarn.

[0028] The composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on conductive yarn through electrostatic spinning;

[0029] S2. Preparation of sodium carboxymethyl cellulose fibers

[0030] The tencel fiber is treated with alkali solution, then treated with chloroacetic acid solution, separated, then neutralized with acid solution, washed, and dried to obtain sodium carboxymethyl cellulose fiber;

[0031] S3. Preparation of self-generated microcurrent gel mask substrate

[0032] Take the composite piezoelectric gauze, attach the gel fiber net to both sides of the composite piezoelectric gauze through hydroentanglement, and obtain a self-generated micro-current gel mask substrate.

[0033] In a third aspect, the present application provides an application of a self-generating microcurrent gel mask substrate, wherein the self-generating microcurrent gel mask substrate is applied to a mask.

[0034] The beneficial effects of this application are:

[0035] 1. The self-generating microcurrent gel mask substrate described in the present application may adopt a three-layer structure, with a composite piezoelectric gauze in the middle and gel fiber nets on the upper and lower layers. The composite piezoelectric gauze is locked in the middle by interweaving the gaps in the gel fiber net.

[0036] 2. The self-generating microcurrent gel mask substrate described in the present application, the composite piezoelectric yarn in the composite piezoelectric gauze is obtained by electrospinning polyvinylidene fluoride (PVDF) and potassium sodium niobate piezoelectric ceramic powder (KNN) on the surface of the conductive yarn, and the piezoelectric activity of the composite piezoelectric gauze is stable; the sodium carboxymethyl cellulose fiber in the gel fiber net is a low-substitution fiber, which has a certain transparency after absorbing water and can still maintain its fibrous shape after dehydration and drying.

[0037] 3. The preparation method described in this application uses a water-based modification method without using organic solvents, thereby reducing environmental pollution and modification costs; the gel fiber web is directly attached to the gauze interlayer by water thorns, and the strength of the self-generated microcurrent gel mask base material is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Figure 1 This is a schematic structural diagram of the self-generating micro-current gel mask substrate described in this application;

[0040] Among them: 1. composite piezoelectric gauze; 2. gel fiber net; 21. gel fiber. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0042] As used herein, "and / or" includes the term of any and all combinations of one or more associated listed items. The terms used herein are only used to describe specific embodiments and are not intended to limit the present invention. As used herein, the singular forms "a", "an", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It is further understood that "including", when used in this specification, specifies the stated features, integers, steps, operations, elements and / or compositions, but does not exclude the existence or addition of one or more other features, integers, steps, operations, elements, compositions and / or combinations thereof.

[0043] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs. It is further understood that terms, such as defined in commonly used dictionaries, are interpreted in accordance with their meanings in the context of the relevant art and are not in an idealized or overly formal sense unless explicitly so defined herein.

[0044] The exemplary invention described herein may appropriately lack any one or more element limitations that are not specifically disclosed herein. Therefore, the terms "comprise", "include", "contain", etc. should be understood broadly and non-restrictively. In addition, the terminology used herein is used as a description, not a limitation, and it is unintentional to use these terminology expressions that do not include any equivalent characteristics, but only describe some of their characteristics, but various modifications are possible within the scope of the present invention according to the rights. Therefore, although the present invention has been specifically disclosed by preferred embodiments and optional features, the modifications disclosed herein to embody the changes of the present invention may be recorded by those skilled in the art, and such modifications and changes will be considered to be within the scope of the present invention.

[0045] A self-generated micro-current gel mask substrate, comprising a composite piezoelectric gauze and a gel fiber net arranged on both sides of the composite piezoelectric gauze;

[0046] The composite piezoelectric gauze is formed by weaving warp yarns made of composite piezoelectric yarns and weft yarns made of cotton yarns;

[0047] The gel fiber web is formed by hydroentanglement of sodium carboxymethyl cellulose fibers.

[0048] In some embodiments, the composite piezoelectric gauze has a gram weight of 15 g / m 2 The weight of the gel fiber web is 20-30 g / m 2 .

[0049] In some embodiments, the sodium carboxymethyl cellulose fiber is obtained by modifying Tencel fiber, and the degree of substitution of the sodium carboxymethyl cellulose fiber is 0.2-0.25.

[0050] In some embodiments, the composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on a conductive yarn by electrostatic spinning. The conductive yarn is a copper-plated polyester yarn, and the mass ratio of polyvinylidene fluoride to potassium sodium niobate piezoelectric ceramic powder on the composite piezoelectric yarn is 85:15.

[0051] The preparation method of the self-generated micro-current gel mask substrate comprises the following steps:

[0052] S1. Preparation of composite piezoelectric gauze

[0053] The composite piezoelectric gauze is formed by weaving warp yarn made of composite piezoelectric yarn and weft yarn made of cotton yarn.

[0054] The composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on conductive yarn through electrostatic spinning;

[0055] S2. Preparation of sodium carboxymethyl cellulose fibers

[0056] The tencel fiber is treated with alkali solution, then treated with chloroacetic acid solution, separated, then neutralized with acid solution, washed, and dried to obtain sodium carboxymethyl cellulose fiber;

[0057] S3. Preparation of self-generated microcurrent gel mask substrate

[0058] Take the composite piezoelectric gauze, attach the gel fiber net to both sides of the composite piezoelectric gauze through hydroentanglement, and obtain a self-generated micro-current gel mask substrate.

[0059] In some embodiments, in step S1, during the electrospinning process, the electrospinning liquid is respectively placed in two spinning needle tubes, and the copper-plated polyester yarn is subjected to conjugate electrospinning, the spinning voltage is 15kv, the spinning flow rate is 1mL / h, the spinning nozzle is 15cm away from the central axis of the copper-plated polyester, and the metal disc speed is 500RPM; after the electrospinning is completed, a composite piezoelectric yarn is obtained; the mass ratio of polyvinylidene fluoride to potassium sodium niobate piezoelectric ceramic powder on the composite piezoelectric yarn is 85:15.

[0060] Specifically, the preparation process of the electrospinning solution is as follows:

[0061] 0.85 g of PVDF powder was dissolved in a mixed solution of DMF and acetone, wherein the volume ratio of DMF and acetone was 1:1 and the mass fraction of PVDF was 8.5%. Then 0.15 g of nano potassium sodium niobate ceramic particles (particle size 5-10 nm) were added, and the mixed solution was placed on a magnetic stirrer and stirred at room temperature for 24 hours to obtain a homogeneous electrospinning solution.

[0062] In this application, the electrospinning process uses a high voltage electric field to charge and deform a polymer solution or melt, and forms a jet stream under the action of the electric field force. After the solvent evaporates and the stream solidifies, it is collected on a receiving device to form a fiber. Moreover, both PVDF and KNN have good piezoelectric properties, that is, they can generate electric charge when subjected to mechanical stress. By coating these two materials on conductive yarns through electrospinning technology, composite piezoelectric yarns with stable piezoelectric activity can be prepared.

[0063] In step S1, the electrospinning technology can ensure the uniform distribution of PVDF and KNN on the conductive yarn, thereby improving the piezoelectric stability and service life of the composite piezoelectric yarn. Compared with other physical or chemical bonding methods, the electrospinning technology is easier to operate, and the prepared composite piezoelectric yarn structure is more stable and not easy to fall off. Through conjugate electrospinning, two or more spinning solutions with different properties can be spun out simultaneously to form a composite material with an oriented structure. This composite material combines the advantages of each component material and has better comprehensive performance. The oriented structure improves the mechanical properties of the fiber.

[0064] Therefore, the composite piezoelectric yarn prepared by electrospinning combines the conductivity of the conductive yarn with the piezoelectricity of PVDF and KNN, and can effectively generate microcurrent under mechanical stress such as skin shaking, promoting cell metabolism and physiological function recovery. The composite piezoelectric yarn can be used in the mask substrate to give the mask substrate the characteristics of self-generated microcurrent, thus playing a unique role in the beauty field, such as tightening the skin and reducing wrinkles.

[0065] In some embodiments, in step S2, the preparation process of sodium carboxymethyl cellulose fiber is as follows: the Tencel fiber is placed in a sodium hydroxide solution with a mass concentration of 10-15%, and soaked at 30-40°C for 20-40 minutes; the Tencel fiber is taken out and soaked in a chloroacetic acid solution with a mass concentration of 10-15%, and the soaking conditions are a reaction temperature of 60-80°C and a reaction time of 30-60 minutes, and then centrifuged; the centrifuged Tencel fiber is washed with an acetic acid solution with a mass concentration of 5%, and the pH of the Tencel fiber is washed to 5-7, and then dried to obtain sodium carboxymethyl cellulose fiber with a degree of substitution of 0.2-0.25.

[0066] In the application, during the alkali treatment, the hydroxide ions in the alkali solution can react with the groups in the fiber to increase the hydrophilicity and reactivity of the fiber. The alkali solution treatment opens the molecular chain structure of the Tencel fiber, providing better reaction conditions for the subsequent chloroacetic acid solution treatment, making the reaction more uniform and sufficient; the chloroacetic acid solution treatment can introduce carboxymethyl groups on the Tencel fiber to obtain sodium carboxymethyl cellulose fiber, and the sodium carboxymethyl cellulose fiber has good water absorption and biocompatibility, and is suitable for products such as facial masks that require good fit and water absorption;

[0067] Centrifugation is to separate the fiber from the reaction solution by physical means; acid solution neutralization is to adjust the pH value of the fiber to avoid the influence of residual alkali solution on subsequent use; washing is to remove impurities attached to the fiber; drying is to remove moisture from the fiber to make it reach a stable state. Therefore, through the above-mentioned treatment process, it is ensured that the obtained sodium carboxymethyl cellulose fiber has stable chemical and physical properties, which is suitable for the subsequent preparation of facial mask substrates.

[0068] Through step S2, the modification is carried out by a water-based method without using organic solvents, thereby reducing environmental pollution and modification costs; the water absorption of sodium carboxymethyl cellulose fiber is better than that of original Tencel fiber, which enables the mask to better absorb and retain the essence when used, and the sodium carboxymethyl cellulose fiber has better biocompatibility, reducing the risk of irritation and allergies to the facial skin.

[0069] Specifically, Tencel fiber is a cellulose fiber, which is a type of regenerated fiber. The Tencel fiber can be directly commercially available or can be obtained according to existing conventional processes.

[0070] In some embodiments, in step S3, the composite piezoelectric gauze is used as an interlayer, and sodium carboxymethyl cellulose fibers are attached to both sides of the composite piezoelectric gauze by hydroentanglement to obtain the composite piezoelectric gauze and a gel fiber mesh arranged on both sides of the composite piezoelectric gauze.

[0071] Specifically, the sodium carboxymethyl cellulose fiber obtained in step S2 is subjected to opening, cleaning and combing processes to obtain a fiber web, and two layers of fiber web are laid on both sides of the composite piezoelectric gauze layer before entering the hydroentanglement process. The hydroentanglement pressure is 40 MPa, and a gel fiber web is formed on both sides of the composite piezoelectric gauze.

[0072] In this application, the purpose of hydroentanglement is to evenly adhere the gel fiber web to both sides of the composite piezoelectric gauze through the action of high-pressure water flow, thereby reinforcing the bond between the two and forming a complete self-generated micro-current gel mask substrate; the technical principle involved in hydroentanglement is to use high-pressure water flow to impact the fiber material, so that the fibers are entangled and entangled with each other, thereby achieving the effect of bonding and reinforcement. In this process, the high-speed impact of the water flow enables the gel fiber web to be tightly attached to the surface of the composite piezoelectric gauze; and the water flow impact during the hydroentanglement process will also cause the fibers to rearrange and orient, making the arrangement between the fibers more orderly, thereby improving the overall strength and performance of the mask substrate;

[0073] Therefore, the hydroentanglement treatment makes the bond between the gel fiber net and the composite piezoelectric gauze tighter and less likely to fall off, thereby improving the performance and stability of the product, increasing the overall strength of the substrate, and making the mask substrate more durable during use. Moreover, the mask substrate treated with the hydroentanglement process has a smoother surface and a softer touch, which improves user comfort.

[0074] The application of the self-generating micro-current gel mask substrate described above is to apply the self-generating micro-current gel mask substrate to a mask, specifically, the self-generating micro-current gel mask substrate is used as a substrate and combined with essence to prepare a mask.

[0075] Example 1

[0076] The preparation method of the self-generated micro-current gel mask substrate comprises the following steps:

[0077] S1. Preparation of composite piezoelectric gauze

[0078] The composite piezoelectric gauze is formed by weaving warp yarn made of composite piezoelectric yarn and weft yarn made of cotton yarn.

[0079] The composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on copper-plated polyester yarn through electrospinning;

[0080] During the electrospinning process, the electrospinning liquid was placed in two spinning needle tubes respectively, and the copper-plated polyester yarn was subjected to conjugate electrospinning. The spinning voltage was 15kv, the spinning flow rate was 1mL / h, the spinning nozzle was 15cm away from the central axis of the copper-plated polyester, and the metal disc speed was 500RPM. After the electrospinning was completed, a composite piezoelectric yarn was obtained. The mass ratio of polyvinylidene fluoride to potassium sodium niobate piezoelectric ceramic powder on the composite piezoelectric yarn was 85:15.

[0081] The preparation process of the electrospinning solution is as follows: 0.85 g of PVDF powder is dissolved in a mixed solution of DMF and acetone, wherein the volume ratio of DMF and acetone is 1:1, the mass fraction of PVDF is 8.5%, and then 0.15 g of nano potassium sodium niobate ceramic particles (particle size 5 nm) are added, and the mixed solution is placed on a magnetic stirrer and stirred at room temperature for 24 hours to obtain a homogeneous electrospinning solution.

[0082] S2. Preparation of sodium carboxymethyl cellulose fibers

[0083] The tencel fiber is treated with alkali solution, then treated with chloroacetic acid solution, separated, then neutralized with acid solution, washed, and dried to obtain sodium carboxymethyl cellulose fiber;

[0084] The specific process is to dissolve 3kg of sodium hydroxide in 27kg of water and use it after the temperature drops to room temperature; place 1kg of Tencel fiber in the prepared alkali solution at 40 degrees for 20 minutes, then take out the fiber and squeeze it into 11kg;

[0085] Dissolve 1kg of chloroacetic acid in 9kg of water, add the alkalized fiber into the prepared chloroacetic acid solution, stir thoroughly, control the temperature at 60℃ for 30min, and centrifuge at 40hz for 15min;

[0086] The centrifuged fibers were added into a 5% acid washing solution until the pH value was 5-7, and then washed once with water and centrifuged and dried. The tested fiber substitution degree was 0.2.

[0087] S3. Preparation of self-generated microcurrent gel mask substrate

[0088] The sodium carboxymethyl cellulose fibers obtained in step S2 are subjected to opening, cleaning and combing processes to obtain a fiber web, and two layers of fiber web are laid on both sides of the composite piezoelectric gauze layer before entering a hydroentanglement process. The hydroentanglement pressure is 40 MPa, and a gel fiber web is formed on both sides of the composite piezoelectric gauze. Specifically, 20 g of the composite piezoelectric gauze is used as an interlayer, and a 50 g self-generated micro-current gel mask substrate is made by a hydroentanglement process;

[0089] The performance of the self-generated microcurrent gel mask substrate was tested, the liquid absorption capacity was 8 times, the transparency was 50%, and the transverse and longitudinal strength after water absorption was 110 / 86 (N / 5cm).

[0090] Example 2

[0091] The preparation method of the self-generated micro-current gel mask substrate comprises the following steps:

[0092] S1. Preparation of composite piezoelectric gauze

[0093] The composite piezoelectric gauze is formed by weaving warp yarn made of composite piezoelectric yarn and weft yarn made of cotton yarn.

[0094] The composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on copper-plated polyester yarn through electrospinning;

[0095] The electrospinning process was consistent with that in Example 1;

[0096] S2. Preparation of sodium carboxymethyl cellulose fibers

[0097] The tencel fiber is treated with alkali solution, then treated with chloroacetic acid solution, separated, then neutralized with acid solution, washed, and dried to obtain sodium carboxymethyl cellulose fiber;

[0098] The specific process is to dissolve 4.5kg of sodium hydroxide in 25.5kg of water and use it after the temperature drops to room temperature; place 1kg of Tencel fiber in the prepared alkali solution at 40 degrees for 20 minutes, then take out the fiber and squeeze it into 11kg;

[0099] Dissolve 1.5 kg of chloroacetic acid in 8.5 kg of water, add the alkalized fiber into the prepared chloroacetic acid solution, stir thoroughly, control the temperature at 60°C to react for 30 minutes, and centrifuge at 40 Hz for 15 minutes;

[0100] The centrifuged fiber was added to a 5% acid wash solution until the pH value was 5-7, then washed with water and centrifuged and dried. The fiber substitution degree was tested to be 0.23.

[0101] S3. Preparation of self-generated microcurrent gel mask substrate

[0102] The sodium carboxymethyl cellulose fibers obtained in step S2 are subjected to opening, cleaning and combing processes to obtain a fiber web, and two layers of fiber web are laid on both sides of the composite piezoelectric gauze layer before entering a hydroentanglement process. The hydroentanglement pressure is 40 MPa, and a gel fiber web is formed on both sides of the composite piezoelectric gauze. Specifically, 20 g of the composite piezoelectric gauze is used as an interlayer, and a 50 g self-generated micro-current gel mask substrate is made by a hydroentanglement process;

[0103] Testing the performance of the self-generated microcurrent gel mask substrate, the liquid absorption capacity is 9.8 times, the transparency is 60%, and the transverse and longitudinal strength after water absorption is 98 / 67 (N / 5cm);

[0104] Example 3

[0105] The preparation method of the self-generated micro-current gel mask substrate comprises the following steps:

[0106] S1. Preparation of composite piezoelectric gauze

[0107] The composite piezoelectric gauze is formed by weaving warp yarn made of composite piezoelectric yarn and weft yarn made of cotton yarn.

[0108] The composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on copper-plated polyester yarn through electrospinning;

[0109] The electrospinning process was consistent with that in Example 1;

[0110] S2. Preparation of sodium carboxymethyl cellulose fibers

[0111] The tencel fiber is treated with alkali solution, then treated with chloroacetic acid solution, separated, then neutralized with acid solution, washed, and dried to obtain sodium carboxymethyl cellulose fiber;

[0112] The specific process is to dissolve 4.5kg of sodium hydroxide in 25.5kg of water and use it after the temperature drops to room temperature; place 1kg of Tencel fiber in the prepared alkali solution at 30 degrees for 40 minutes, then take out the fiber and squeeze it into 11kg;

[0113] Dissolve 1.5 kg of chloroacetic acid in 8.5 kg of water, add the alkalized fiber into the prepared chloroacetic acid solution, stir thoroughly, control the temperature at 80°C to react for 30 minutes, and centrifuge at 40 Hz for 15 minutes;

[0114] The centrifuged fiber was added to a 5% acid wash solution until the pH value was 5-7, then washed with water and centrifuged and dried. The fiber substitution degree was tested to be 0.25.

[0115] S3. Preparation of self-generated microcurrent gel mask substrate

[0116] The sodium carboxymethyl cellulose fibers obtained in step S2 are subjected to opening, cleaning and combing processes to obtain a fiber web, and two layers of fiber web are laid on both sides of the composite piezoelectric gauze layer before entering a hydroentanglement process. The hydroentanglement pressure is 40 MPa, and a gel fiber web is formed on both sides of the composite piezoelectric gauze. Specifically, 20 g of the composite piezoelectric gauze is used as an interlayer, and a 50 g self-generated micro-current gel mask substrate is made by a hydroentanglement process;

[0117] The performance of the self-generated microcurrent gel mask substrate was tested, and the liquid absorption capacity was 11.5 times, the transparency was 65%, and the transverse and longitudinal strength after water absorption was 88 / 59 (N / 5cm).

[0118] The performance tests involved in the embodiments are carried out as follows:

[0119] The method for testing water absorption is: immerse the test sample in water, take it out after it is fully moistened, and weigh it when there is no obvious water droplet falling from the test sample. The water absorption rate of the test sample = the weight of the water-containing test sample / the weight of the test sample.

[0120] The method for transparency testing is: immerse the test sample in water, take it out after it is fully moistened, and when there is no obvious water droplet falling from the test sample, test it with a visible light transmittance tester.

[0121] The test method for the transverse and longitudinal strength after water absorption is: cut the test sample into a 5*20cm shape and immerse it in water. Take it out after it is fully moistened. When there is no obvious water droplet falling from the test sample, use a strength machine to test the breaking strength of the sample.

[0122] The self-generated micro-current gel mask substrates of Examples 1-3 were soaked in water for 1 min and then taken out. The short-circuit current was measured using an electrometer (Keithley, 6514). The results are as follows:

[0123] Example 1: 2.76μA, Example 2: 3.37μA, Example 3: 4.15μA.

[0124] The raw materials or reagents used in the examples and comparative examples of the present invention are all purchased from mainstream manufacturers in the market. Those without indicating the manufacturer or concentration are all analytically pure raw materials or reagents that can be routinely obtained. As long as they can play the expected role, there is no special limitation.

[0125] The instruments and equipment used in this embodiment are all purchased from major manufacturers in the market, and there is no particular limitation as long as they can play the expected role. In this embodiment, if no specific technology or conditions are specified, the technology or conditions described in the literature in this field or the product instructions are used. The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A self-generating microcurrent gel mask substrate, characterized in that: It comprises a composite piezoelectric gauze and a gel fiber net arranged on both sides of the composite piezoelectric gauze; The composite piezoelectric gauze is formed by weaving warp yarns made of composite piezoelectric yarns and weft yarns made of cotton yarns; The gel fiber web is formed by hydroentanglement of sodium carboxymethyl cellulose fibers.

2. The self-generating micro-current gel mask substrate according to claim 1, characterized in that: The composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on conductive yarn through electrostatic spinning.

3. The self-generating micro-current gel mask substrate according to claim 2, characterized in that: The conductive yarn is copper-plated polyester yarn, and the mass ratio of polyvinylidene fluoride to potassium sodium niobate piezoelectric ceramic powder on the composite piezoelectric yarn is 85:

15.

4. The self-generating micro-current gel mask substrate according to claim 2, characterized in that: During the electrospinning process, the electrospinning liquid is placed in two spinning needle tubes respectively, and the copper-plated polyester yarn is subjected to conjugate electrospinning. The spinning voltage is 15 kV, the spinning flow rate is 1 mL / h, the spinning nozzle is 15 cm away from the central axis of the copper-plated polyester, and the metal disc speed is 500 RPM; after the electrospinning is completed, a composite piezoelectric yarn is obtained.

5. The self-generating micro-current gel mask substrate according to claim 1, characterized in that: The composite piezoelectric gauze has a gram weight of 15 g / m 2 .

6. The self-generating micro-current gel mask substrate according to claim 1, characterized in that: The weight of the gel fiber web is 20-30 g / m 2 .

7. The self-generating micro-current gel mask substrate according to claim 1, characterized in that: The sodium carboxymethyl cellulose fiber is obtained by modifying Tencel fiber, and the degree of substitution of the sodium carboxymethyl cellulose fiber is 0.2-0.

25.

8. The self-generating micro-current gel mask substrate according to claim 1, characterized in that: The preparation method of the sodium carboxymethyl cellulose fiber comprises the following steps: The tencel fiber is treated with alkali solution, then treated with chloroacetic acid solution, separated, neutralized with acid solution, washed and dried in sequence to obtain sodium carboxymethyl cellulose fiber.

9. The self-generating micro-current gel mask substrate according to claim 8, characterized in that: The temperature of the alkali solution treatment is 30-40°C; the concentration of the chloroacetic acid solution is 10-15%, and the temperature of the chloroacetic acid solution treatment is 60-80°C.

10. The method for preparing the self-generating micro-current gel mask substrate according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Preparation of composite piezoelectric gauze The composite piezoelectric gauze is formed by weaving warp yarn made of composite piezoelectric yarn and weft yarn made of cotton yarn. The composite piezoelectric yarn is obtained by coating polyvinylidene fluoride and potassium sodium niobate piezoelectric ceramic powder on conductive yarn through electrostatic spinning; S2. Preparation of sodium carboxymethyl cellulose fibers The tencel fiber is treated with alkali solution, then treated with chloroacetic acid solution, separated, then neutralized with acid solution, washed, and dried to obtain sodium carboxymethyl cellulose fiber; S3. Preparation of self-generated microcurrent gel mask substrate The sodium carboxymethyl cellulose fibers prepared in step S2 are combed to obtain a combed fiber web. Take the composite piezoelectric gauze, attach the gel fiber net to both sides of the composite piezoelectric gauze through hydroentanglement, and obtain a self-generated micro-current gel mask substrate.

11. An application of a self-generated micro-current gel mask substrate, characterized in that: Apply the self-generated microcurrent gel mask base material to the mask.

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