Antistatic wig hairline and preparation method thereof

Abstract

The invention discloses an antistatic wig hairline and a preparation method thereof. The antistatic wig hairline is characterized by comprising regenerated polyester, a quantum dot-carbon nanotube composite antistatic agent, a phase-change flame-retardant microcapsule, a bioactive protein fiber reinforcement and a functional additive which are subjected to melt spinning to prepare the hairline, wherein the regenerated polyester, the quantum dot-carbon nanotube composite antistatic agent, the phase-change flame-retardant microcapsule, the bioactive protein fiber reinforcement and the functional additive are subjected to melt spinning. Wherein the antistatic agent is formed by compounding cadmium sulfide quantum dots and carboxylated single-walled carbon nanotubes, and has good stability; the phase-change flame-retardant microcapsules can enhance the flame retardance; the bioactive protein fiber reinforcement is composed of dopamine modified mulberry silk fibroin fibers. The invention solves the problem that the anti-static property of the wig is reduced after the wig is used for a long time and cleaned, improves the anti-static property, flame-retardant property and the like of the wig, and has higher practical value.

Description

Technical Field

[0001] The invention relates to the technical field of simulated wigs, and in particular to an antistatic wig hair and a preparation method thereof. Background Art

[0002] As a fashion accessory and a product used to compensate for hair loss and other problems, the demand for wigs in the market is gradually increasing. Currently, the wig hair on the market is mainly made of synthetic fiber materials or real human hair materials. No matter which one, it is easy to generate static electricity in a dry environment or after frequent friction with foreign objects such as clothing and scalp. The generation of static electricity will cause the hair to repel each other, thus affecting the shape of the wig. On the other hand, static electricity will also cause the wig hair to absorb dust, dandruff and other impurities, thus affecting the hygiene of the wig, and even causing damage to the wig and affecting the aging speed of the wig.

[0003] At present, in response to the problem of anti-static treatment of wigs, Patent No. (202210812184.6) discloses a flame-retardant anti-static recycled polyester wig fiber and its preparation method, which mainly uses recycled polyester as the main base material, supplemented by anti-static recycled polyester masterbatch containing biomass graphene to achieve the anti-static function of hair.

[0004] However, in the above scheme, although biomass graphene has good electrical conductivity and can improve the antistatic performance of the wig to a certain extent, in actual use, due to the limited dispersion stability of biomass graphene in the fiber, when the wig is used, when the wig is subjected to various external forces, such as combing and friction, the distribution of biomass graphene inside the fiber will change, causing some graphene to agglomerate and unable to form an effective conductive network, thereby reducing the antistatic performance. In addition, detergents, friction and other factors during the cleaning process may also destroy the combination of biomass graphene and fiber, causing it to fall off the fiber surface, so that the antistatic effect of the wig will gradually weaken during multiple cleanings. Summary of the invention

[0005] The present invention provides an antistatic wig hair and a preparation method thereof, which solves the problem in the prior art that after the wig hair is used for a long time and washed, the distribution position of biomass graphene in the fiber changes, thereby causing part of the graphene to agglomerate or fall off from the fiber, thereby reducing the antistatic performance of the fiber.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an antistatic wig hair, which is made by melt spinning the following components, including: recycled polyester, quantum dot-carbon nanotube composite antistatic agent, phase change flame retardant microcapsule, bioactive protein fiber reinforcement and functional additives; the quantum dot-carbon nanotube composite antistatic agent is composited by cadmium sulfide quantum dots and carboxylated single-walled carbon nanotubes through amidation reaction; the phase change flame retardant microcapsule is made of polyethylene glycol and phosphate flame retardant as core material and urea-formaldehyde resin as wall material; the bioactive protein fiber reinforcement is composed of dopamine-modified mulberry silk protein fiber.

[0007] The present invention is further configured such that the functional additive includes a photocatalytic self-cleaning nano-coating agent, the photocatalytic self-cleaning nano-coating agent includes a mixed solution made by mixing a silane coupling agent and an acrylic resin, titanium dioxide nanoparticles are dispersed in the mixed solution, and the titanium dioxide nanoparticles contain silver ions.

[0008] The present invention is further configured that the functional additive includes negative ion releasing microspheres, the particle size of the negative ion releasing microspheres is 50-100 microns, and the negative ion releasing microspheres are used to enable the wig hair to continuously release negative ions.

[0009] The present invention is further configured such that the functional additive includes a temperature-sensitive color-changing pigment solution, which can allow the wig hair to change color according to temperature changes.

[0010] The present invention is further configured such that, in the core material of the phase-change flame-retardant microcapsule, the mass ratio of the polyethylene glycol to the phosphate flame retardant is 3:1, and the urea-formaldehyde resin is wrapped around the core material by an in-situ polymerization method.

[0011] A method for preparing antistatic wig hair, which is used to prepare antistatic wig hair, comprises the following steps: S1. Raw material preparation: After the waste PET bottle flakes are recycled and regenerated, the recycled polyester is obtained as the matrix material through alcoholysis pretreatment, and then the quantum dot-carbon nanotube composite antistatic agent, phase change flame retardant microcapsule and bioactive protein fiber reinforcement are prepared respectively; S2. Preparation of functional additives: preparation of photocatalytic self-cleaning nano coating agent, negative ion releasing microspheres and thermosensitive color changing pigment solution; S3, preparation of layered materials: the recycled polyester is divided into three parts, and then all are melted through a twin-screw extruder, and then a quantum dot-carbon nanotube composite antistatic agent and a bioactive protein fiber reinforcement are added to the first part for stirring and ultrasonic dispersion to obtain a core layer material; Adding phase-change flame-retardant microcapsules into the second portion, stirring and ultrasonically dispersing the microcapsules to obtain a flame-retardant layer material; Adding a photocatalytic self-cleaning nano coating agent, negative ion releasing microspheres and a temperature-sensitive color-changing pigment solution into the third portion and stirring the mixture to obtain a functional layer material; S4, spinning: the three materials prepared in S3 are respectively injected into a coaxial composite spinning nozzle having at least three layers of sleeve structure, and the multi-layer composite spinning technology is used for spinning, wherein the three layers of sleeve correspond to the core layer material, the flame retardant layer material and the functional layer material from the inside to the outside, respectively, and the coaxial composite spinning nozzle composites the materials of each layer according to a preset structure, and extrude them from the nozzle to obtain a primary fiber with a layered structure; The cross section of the primary fiber is circular, and is sequentially provided with an antistatic layer, a flame retardant layer and an outer layer from the inside to the outside. The antistatic layer is made of a core layer material, the flame retardant layer is made of a flame retardant layer material, and the outer layer is made of a functional layer material.

[0012] S5, stretching and heat setting treatment: the as-spun fibers obtained in S4 are stretched and heat-set by a stretching device and a heat setting device to obtain treated hair; S6, post-processing: performing plasma treatment on the hair treated in S5, wherein argon gas is used as the working gas during the plasma treatment; then immersing the plasma-treated hair in a photocatalytic self-cleaning nano-coating agent to form a nano-coating on the surface of the hair, thereby obtaining a finished hair; The present invention is further configured that, in S1, the preparation steps of the quantum dot-carbon nanotube composite antistatic agent are as follows: A1. Synthesis and preparation of cadmium sulfide quantum dots: under a nitrogen atmosphere, cadmium oleate and octadecene are added to a three-necked flask, slowly heated to 250-300°C to fully dissolve the cadmium oleate, and then pre-prepared sulfur powder is injected to obtain an octadecene solution. After the octadecene reaction is completed, the solution is naturally cooled to room temperature, and then excess ethanol is added to the reaction solution to precipitate the quantum dots. After multiple centrifugal separations and washings, impurities are removed to finally obtain pure cadmium sulfide quantum dots. The cadmium sulfide quantum dots are then added to an organic solvent to obtain a cadmium sulfide quantum dot solution. A2. Carboxylation of carbon nanotubes: firstly, concentrated sulfuric acid and concentrated nitric acid are mixed in a volume ratio of 3:1 to obtain a mixed acid solution, then single-walled carbon nanotubes are added to the mixed acid solution, and the mixed acid solution containing the single-walled carbon nanotubes is placed in an oil bath at 60-80° C. and stirred to oxidize the carbon atoms on the surface of the carbon nanotubes, and then the reaction is filtered and washed to obtain oxidized carbon nanotubes, and finally the oxidized carbon nanotubes are dried in an oven to obtain carboxylated carbon nanotubes; A3. Composite: Disperse the carboxylated carbon nanotubes in N,N-dimethylformamide, and then perform ultrasonic treatment to obtain a suspension. Then, add the cadmium sulfide quantum dot solution prepared in A1 to the suspension, and add 1-ethyl-3-carbodiimide and N-hydroxysuccinimide as catalysts. Then, place the suspension in an oil bath for stirring reaction. Wait for the reaction to end, and obtain a quantum dot-carbon nanotube composite antistatic agent by centrifugal separation and filtration.

[0013] The present invention is further configured that, in S2, the preparation process of the photocatalytic self-cleaning coating agent is as follows: B1. Preparation of nanoparticles: First, silver nitrate is dissolved in deionized water to obtain a silver nitrate solution for standby use, then tetrabutyl titanate is added dropwise into anhydrous ethanol and stirred evenly to obtain a tetrabutyl titanate solution, then the silver nitrate solution is added dropwise into the tetrabutyl titanate solution, and glacial acetic acid is added simultaneously until the pH value of the tetrabutyl titanate solution mixed with the silver nitrate solution reaches 2-3 to obtain an acidic solution, then the acidic solution is stirred and reacted at 60-80° C. for 4-6 hours to obtain a sol, and then the sol is calcined at a temperature of 500-600° C. for 2-3 hours to obtain nanoparticles; B2. Preparation of coating agent: Add the nanoparticles in B1 to a mixed solution containing a silane coupling agent and an acrylic resin, and disperse them by ultrasonication for 1-2 hours to obtain a coating agent.

[0014] The present invention is further configured that, in S2, the preparation process of the negative ion releasing microspheres is as follows: C1. Tourmaline powder treatment: ball-mill the tourmaline powder to a particle size of less than 1 micron, put it into a solution containing 1% silane coupling agent, and stir for 2 hours to obtain surface-modified tourmaline powder; C2, microsphere preparation: the tourmaline powder treated in C1 is mixed with the polyvinyl alcohol solution in a mass ratio of 1:2, and then a cross-linking agent is added and stirred to form a slurry; C3. Drying: The slurry in C2 is made into microspheres in an environment of 130° C. by spray drying.

[0015] The present invention is further configured that, in S2, the preparation process of the temperature-sensitive color-changing pigment solution is as follows: D1. Mixing color-changing materials: adding crystal violet lactone, bisphenol A and tetradecanol in a mass ratio of 1:3:6 into a three-necked flask, and then stirring at 90° C. to obtain a color-changing material; D2. Pigment preparation: Mix the color-changing material obtained in D1 with silicone oil and sodium carboxymethyl cellulose, and then stir evenly to obtain a pigment solution.

[0016] In summary, the beneficial effects of the present invention are: Compared with the prior art, the present application adds a quantum dot-carbon nanotube composite antistatic agent to the wig hair, wherein the quantum dots in the antistatic agent have strong conductivity and stable physical and chemical properties, and can form a charge conduction channel in the fiber, and the carboxylated single-walled carbon nanotubes have excellent conductivity and high surface area, which can enhance the dispersibility and stability of the quantum dots. When the two are compounded through an amidation reaction, the formed composite material can better form a conductive network in the wig hair, effectively avoiding the problems of agglomeration and uneven dispersion of traditional electrostatic materials due to external forces such as friction, combing, and washing, thereby ensuring that the wig maintains a stable antistatic effect during use, preventing the accumulation of static electricity and the adsorption of impurities such as dust and dandruff, thereby improving the use experience and sanitary conditions of the wig.

[0017] At the same time, the addition of phase-change flame-retardant microcapsules can improve the high-temperature resistance and flame-retardant properties of the hair. The phase-change flame-retardant material in the microcapsules can absorb or release heat at a certain temperature, thereby changing its physical state and achieving the effect of regulating the temperature. In a high-temperature environment, the phase-change material will absorb too much heat, prevent the wig hair from overheating, and reduce damage and aging caused by high temperatures. In addition, the flame-retardant component can also release chemicals that inhibit the spread of flames under high temperature conditions, improving the safety of the wig and making it safer when used in a wider range of environments.

[0018] In addition, the bioactive protein fiber reinforcement added to the hair, especially the dopamine-modified mulberry silk protein fiber, has the effect of strengthening the fiber structure. The mulberry silk protein fiber itself has good mechanical strength, softness and biocompatibility, and after being modified with dopamine, the interfacial properties of the mulberry silk protein fiber are enhanced, so that the wig maintains good toughness and durability during long-term wearing. In addition, dopamine modification makes the protein fiber have better UV resistance and bioactivity, further improving the service life and comfort of the wig. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of the hair of the present application.

[0020] Figure 2 It is a cross-sectional view of the hair of the present application.

[0021] Figure 3 It is the process flow chart of this application.

[0022] Reference numerals: 1, antistatic layer; 2, flame retardant layer; 3, outer layer. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention. Example

[0024] This embodiment discloses an antistatic wig hair, which is made by melt spinning the following components, including: recycled polyester, quantum dot-carbon nanotube composite antistatic agent, phase change flame retardant microcapsule, bioactive protein fiber reinforcement and functional additives; Among them, recycled polyester accounts for 75% of wig hair, which mainly comes from the recycling of waste PET bottle flakes. First, the waste PET bottle flakes are strictly screened to remove impurities and parts that do not meet the requirements. In this process, vibration screening and airflow screening technology are used to effectively remove larger impurities and non-PET materials. Then, the surface dirt is removed by using high-temperature water and weak acid detergent. Then wash to remove surface dirt, and then crush into suitable particles. Subsequently, at 185℃ and 0.6MPa, it is mixed with polyols and catalysts for 3.5 hours of alcoholysis reaction to convert it into a stable recycled polyester raw material. During the alcoholysis reaction, the reaction temperature is maintained at 185℃±5℃, the pressure is 0.6MPa±0.05MPa, and the reaction time is 3.5 hours to ensure that the alcoholysis reaction is complete.

[0025] This recycling method not only reduces costs, but also reduces the pollution of waste polyester to the environment. Recycled polyester provides basic mechanical properties for wig hair. The ester bond in its molecular structure gives the hair a certain strength, while the flexibility of the molecular chain ensures the flexibility of the hair, making the wig not easy to break during daily combing and wearing, and can maintain a good shape.

[0026] The quantum dot-carbon nanotube composite antistatic agent accounts for 4% of the total mass. It is composed of cadmium sulfide quantum dots and carboxylated single-walled carbon nanotubes through an amidation reaction. It is used to form a conductive network in the wig hair, effectively avoiding the agglomeration and uneven dispersion problems that may occur in traditional electrostatic materials under external forces such as friction, combing, and washing.

[0027] Specifically, the particle size of cadmium sulfide quantum dots is controlled at 3-5 nanometers and is prepared by hot injection. The single-walled carbon nanotubes are carboxylated to have carboxyl functional groups on their surface, increasing the binding sites with quantum dots. The above two are compounded through an amidation reaction. The amidation reaction is a catalyst that causes the carboxyl group to dehydrate and condense with the amino group on the surface of the quantum dots to form a stable amide bond, allowing the two to be tightly combined. Inside the wig hair, the composite antistatic agent builds a three-dimensional conductive network. When the wig rubs against external objects to generate static electricity, the quantum confinement effect of the quantum dots makes it easier for electrons to jump from one quantum dot to another, achieving rapid migration of electrons. The carbon nanotubes, with their extremely high aspect ratio and excellent conductivity, enable electrons to be quickly conducted, neutralize charges, and avoid static electricity accumulation, thereby allowing the wig hair to achieve more efficient and lasting antistatic performance, which is an effect that is difficult to achieve with a single antistatic agent in the prior art. At the same time, the common antistatic agents in the prior art often simply form a conductive layer on the surface of the material, which is easily ineffective due to factors such as friction and washing. The composite antistatic agent integrates the antistatic performance into the internal structure of the hair through compounding at the molecular level, greatly improving the stability and durability of the antistatic effect.

[0028] At the same time, phase change flame retardant microcapsules are also added, which account for 6% of the wig hair. Polyethylene glycol and phosphate flame retardants are mixed in a mass ratio of 3:1 as the core material, and urea-formaldehyde resin is used as the wall material. The two are prepared by in-situ polymerization; specifically, the particle size of the microcapsules is 3-8 microns. When the wig hair encounters high temperature close to the critical value of combustion, polyethylene glycol will undergo a solid-liquid phase change. Polyethylene glycol molecules are closely arranged in the solid state, and the intermolecular force is strong; when the temperature rises to the phase change temperature, the molecules obtain enough energy to overcome the intermolecular force and change from solid to liquid. This process requires the absorption of a large amount of heat, like a small "heat sponge", thereby significantly reducing the surface temperature of the hair and slowing down the combustion rate. At the same time, phosphate flame retardants decompose at high temperatures. In the gas phase, the free radical scavenger produced by the decomposition can combine with highly active free radicals produced in the combustion reaction, such as hydroxyl radicals and hydrogen radicals. These free radicals are the key to maintaining the chain transmission of the combustion reaction. After the scavenger combines with them, the chain transmission of the combustion reaction is interrupted and the combustion is inhibited. In the condensed phase, the carbonized layer formed by the decomposition of phosphate flame retardants is a dense carbonaceous structure with good heat insulation and oxygen isolation properties. It can block the transfer of heat and oxygen inward, further preventing the spread of combustion. With this dual flame retardant mechanism, the limiting oxygen index of the wig hair reaches 56%, and the vertical burning test reaches the highest level of UL94V-0. Compared with traditional flame retardants, the phase change flame retardant microcapsules in this application can not only activate the flame retardant mechanism in time at high temperatures, but also greatly improve the flame retardant efficiency through the synergistic effect of phase change endothermic and chemical flame retardancy. Traditional flame retardants usually work passively after combustion occurs, and the flame retardant effect is limited. The intelligent phase change characteristics of this microcapsule enable it to actively respond to high temperature threats, significantly improving the flame retardant safety of wigs.

[0029] The wig hair also contains bioactive protein fiber reinforcement, which accounts for 3% of the wig hair and is composed of dopamine-modified mulberry silk protein fibers.

[0030] Specifically, silk fibroin fibers are extracted from mulberry silk, and then modified with dopamine and stretched 1.6 times. When extracting silk fibroin fibers from mulberry silk, the silk is placed in a 0.8% by mass sodium carbonate solution and boiled for 45 minutes. The alkaline environment produced by the hydrolysis of sodium carbonate can dissolve the sericin wrapped outside the silk fibroin, thereby separating pure silk fibroin fibers. The dried silk fibroin fibers are then soaked in a Tris-HCl buffer solution containing 2.5% dopamine. In a weakly alkaline environment of pH=8.5, the phenolic hydroxyl groups in dopamine are oxidized, inducing a self-polymerization reaction, and forming a polydopamine coating about 8 nanometers thick on the fiber surface. The polydopamine coating contains rich functional groups such as phenolic hydroxyl groups and amino groups. These functional groups can form hydrogen bonds or other interactions with the molecules of the wig matrix material, thereby improving the compatibility between the fiber and the matrix and making the two more closely combined. The fibers are then stretched 1.6 times, which orients the fiber molecular chains along the stretching direction. The originally disordered molecular chains become orderly, which improves the orientation of the molecular chains. The interaction between the molecular chains is enhanced, thereby enhancing the mechanical properties of the fibers. This not only makes the wig feel softer and smoother, and the friction coefficient with real hair reaches 0.28, which is close to the touch of real hair, but also enhances the overall strength of the wig and reduces the breakage of hair when combing. Compared with traditional wig reinforcement materials, bioactive protein fiber reinforcements are derived from natural biomaterials, have good biocompatibility, and will not cause adverse reactions such as allergies to the human body. At the same time, its unique modification and stretching treatment method greatly enhances the strength while improving the feel, which is difficult to achieve at the same time with other reinforcement materials in the prior art, bringing a qualitative improvement to the user experience of the wig.

[0031] At the same time, functional additives are added to the wig hair, which can give the wig hair some unique functional properties.

[0032] Among them, the functional additives include a photocatalytic self-cleaning nano-coating agent, which accounts for 1.5% of the total mass of the wig hair, including titanium dioxide nanoparticles doped with silver ions, the particle size of the titanium dioxide nanoparticles is 22-28 nanometers, and the silver ion doping amount is 2% of the mass of titanium dioxide, which is prepared by a sol-gel method combined with a calcination treatment. The sol-gel method is to dissolve precursors such as tetrabutyl titanate in an organic solvent, add water and a catalyst under stirring conditions, and cause the precursor to undergo hydrolysis and polycondensation reactions to form a sol. In this process, the silver ions in the silver nitrate are uniformly dispersed in the sol system. As the reaction proceeds, the sol gradually transforms into a gel, and after drying and calcination, titanium dioxide nanoparticles doped with silver ions with a specific crystal structure are formed. The doping of silver ions introduces impurity energy levels in the lattice of titanium dioxide, broadens the response range of titanium dioxide to light, enables it to absorb more wavelengths of light, and improves the photocatalytic efficiency. The nanoparticles are dispersed in a mixed solution containing 1.2% silane coupling agent and 6% acrylic resin. Under light conditions, titanium dioxide nanoparticles doped with silver ions absorb photon energy, and electrons jump from the valence band to the conduction band, generating electron-hole pairs. Holes have strong oxidizing properties and can oxidize and decompose organic pollutants such as oil and sweat adsorbed on the surface of hair, converting them into harmless substances such as carbon dioxide and water. The siloxane group at one end of the silane coupling agent can undergo a condensation reaction with the hydroxyl group on the surface of the nanoparticles, and the organic functional group at the other end can react with the group on the surface of the hair, thereby enhancing the adhesion between the nanoparticles and the surface of the hair. Acrylic resin, as a film-forming substance, forms a continuous and stable coating on the surface of the hair, protecting the nanoparticles from continuing to play a role, realizing the self-cleaning function of the wig, reducing the number of cleaning times, and extending the service life. Compared with traditional cleaning methods or self-cleaning materials, this photocatalytic self-cleaning nano-coating agent uses solar energy to drive the cleaning process, without the need for additional chemical cleaning agents or complex operations. It is not only environmentally friendly, but also has a long-lasting and stable cleaning effect, thereby significantly improving the self-cleaning performance and bringing great convenience to the daily maintenance of the wig.

[0033] At the same time, the functional additives also include negative ion-releasing microspheres, which account for 2.5% of the weight of the wig hair. They are made of tourmaline powder and polyvinyl alcohol in a mass ratio of 1:2, and 0.6% cross-linking agent is added. The microspheres with a particle size of 50-100 microns are made by spray drying. The spray drying method is to spray the mixed slurry into a hot air flow through a nozzle and dry it into microspheres instantly. This method can accurately control the particle size of the microspheres. These microspheres continuously release negative ions, and the amount of negative ions released reaches 2300 / cm³. Negative ions can not only neutralize the positive charge on the surface of the wig hair, further enhance the antistatic effect, but also combine with harmful gases such as formaldehyde and benzene, dust, smoke and other particles in the air. After the negative ions combine with the harmful gas molecules, the chemical properties of the harmful gases are changed, making them easier to be adsorbed or decomposed; combining with the particles causes the particles to condense and settle, thereby purifying the air, improving the microenvironment around the wearer, and benefiting health. Compared with traditional air purification methods or additives, negative ion releasing microspheres are directly integrated into the hair of the wig, continuously releasing negative ions, which can enhance the anti-static properties of the wig while purifying the air.

[0034] In addition, the functional additives also include a thermochromic pigment solution, and the amount of thermochromic pigment added is 2%. It is composed of crystal violet lactone, bisphenol A and tetradecanoic acid in a mass ratio of 1:3:6 to form a thermochromic system, which is mixed with 35% silicone oil and 1.5% sodium carboxymethyl cellulose to form a pigment solution. At room temperature, crystal violet lactone is colorless. When the temperature rises to 28-33°C, the lactone ring of crystal violet lactone opens and reacts with bisphenol A to form a color-developing substance with a conjugated structure, so that the wig hair appears colored, and tetradecanoic acid plays a role in controlling the color change temperature range. Silicone oil has good fluidity and lubricity, which can reduce the interaction between pigment molecules, improve the dispersion of pigments, and make the color more evenly distributed in the hair. Sodium carboxymethyl cellulose is used as a thickener to adjust the viscosity of the solution, ensure that the pigment is evenly distributed in the wig hair, achieve a stable thermochromic effect, add fashion and fun to the wig, and meet the personalized needs of consumers. Compared with traditional wig dyeing methods, temperature-sensitive color-changing pigments bring dynamic color-changing effects to wigs, breaking through the limitations of traditional wig fixed colors.

[0035] Compared with traditional wig hair, the data comparison results are as follows:

[0036] Embodiment 2 like Figure 1-3 As shown, this embodiment discloses a method for preparing an antistatic wig hair, which is used to prepare an antistatic wig hair, comprising the following steps: S1. Raw material preparation: After the waste PET bottle flakes are recycled and regenerated, the recycled polyester is obtained as the matrix material through alcoholysis pretreatment, and then the quantum dot-carbon nanotube composite antistatic agent, phase change flame retardant microcapsule and bioactive protein fiber reinforcement are prepared respectively; Specifically, the preparation process of recycled polyester is as follows: After screening, cleaning and crushing, the waste PET bottle flakes are mixed with polyols and catalysts for reaction at 185°C and 0.6MPa for 3.5 hours to generate ethylene terephthalate by alcoholysis. Recycled polyester is used as the matrix material, providing about 75% of the raw materials in subsequent spinning. Its ester bond structure gives the hair basic mechanical strength, and the alcoholysis regeneration process reduces the crystallization defects of the material, increasing the elongation at break to 28%.

[0037] Meanwhile, in S1, the preparation steps of the quantum dot-carbon nanotube composite antistatic agent are as follows: A1. Synthesis and preparation of cadmium sulfide quantum dots: under nitrogen protection atmosphere, add cadmium oleate and octadecene into a three-necked flask, slowly heat to 250-300°C, fully dissolve the cadmium oleate, and within this temperature range, the particle size of the quantum dots can be effectively controlled at 3-5 nanometers. Then inject the pre-configured octadecene solution containing sulfur powder, let it react for 15 minutes, then naturally cool to room temperature, add excess ethanol to the reaction solution to precipitate the quantum dots, centrifuge at 8000r / min for 10 minutes, wash repeatedly 3 times, and finally obtain pure cadmium sulfide quantum dots, remove impurities, and finally obtain pure cadmium sulfide quantum dots; then add the cadmium sulfide quantum dots into an organic solvent to obtain a cadmium sulfide quantum dot solution; among them, the quantum dot particle size can be accurately controlled at 3-4 nanometers by hot injection method, ensuring that it has good optical and electrical properties, laying the foundation for subsequent composite with carbon nanotubes.

[0038] A2. Carboxylation of carbon nanotubes: First, concentrated sulfuric acid and concentrated nitric acid are mixed in a volume ratio of 3:1 to obtain a mixed acid solution, and then single-walled carbon nanotubes are added to the mixed acid solution. The mixed acid solution containing single-walled carbon nanotubes is placed in an oil bath at 60-80°C and refluxed for 5 hours to oxidize the carbon atoms on the surface of the carbon nanotubes. After waiting for the reaction to end, it is diluted with deionized water, and the carbon nanotubes are collected by filtration. The filtrate is washed repeatedly until the filtrate is neutral, and then dried in an oven at 60°C for 15 hours to obtain carboxylated carbon nanotubes. Among them, the strong oxidizing property of the mixed acid introduces carboxyl functional groups on the surface of the carbon nanotubes, greatly increasing the active sites for combining with quantum dots, which is beneficial to the subsequent composite reaction.

[0039] A3, composite: disperse the carboxylated carbon nanotubes in N, N-dimethylformamide, and then perform ultrasonic treatment to uniformly disperse them to obtain a suspension, then add the cadmium sulfide quantum dot solution prepared in A1 to the suspension, and add 1-ethyl-3-carbodiimide and N-hydroxysuccinimide as catalysts, and then place the suspension in an oil bath for stirring reaction; wait for the reaction to end, and obtain a quantum dot-carbon nanotube composite antistatic agent by centrifugal separation and filtration. Among them, 1-ethyl-3-carbodiimide and N-hydroxysuccinimide as catalysts can effectively promote the amidation reaction between carboxylated carbon nanotubes and quantum dots, so that the two are firmly combined to form a stable composite structure, build an efficient three-dimensional conductive network for wig hair, and significantly improve the antistatic performance.

[0040] The composite antistatic agent prepared as described above can effectively avoid the problem of graphene agglomeration due to external forces such as friction, combing, and washing, thereby ensuring the antistatic performance of the wig hair during long-term use.

[0041] At the same time, the preparation process of phase change flame retardant microcapsules is as follows: first, polyethylene glycol and phosphate flame retardant are added to a three-necked flask in a mass ratio of 3:1, and stirred evenly in a water bath at 90°C to fully mix the two to form a uniform phase change flame retardant material, providing a stable core material for the subsequent preparation of microcapsules. Then, microcapsules are prepared. In another container, urea and formaldehyde are added to water, the pH value is adjusted to 8.5 with sodium hydroxide solution, and the reaction is carried out at 45°C for 45 minutes to obtain urea-formaldehyde resin prepolymer. The phase change flame retardant material is heated to a liquid state, added to an aqueous solution containing sodium dodecylbenzene sulfonate, and stirred at high speed to form an emulsion. Urea-formaldehyde resin prepolymer is then added, the pH value is adjusted to 4.5 with acetic acid, and the reaction is carried out at 55°C for 2.5 hours. After the reaction is completed, the intelligent phase change flame retardant microcapsules are obtained by filtering, washing, and drying in an oven at 50°C. The in-situ polymerization method allows urea-formaldehyde resin to polymerize on the surface of phase change flame retardant material droplets to form wall material, effectively wrapping the core material and controlling the particle size of the microcapsule to 3-8 microns, ensuring the stable release of the flame retardant at high temperature, realizing intelligent flame retardant function and improving the safety of the wig.

[0042] The preparation process of the bioactive protein fiber reinforcement is as follows: extract silk fibroin fiber from mulberry silk, put the mulberry silk into a sodium carbonate solution with a mass fraction of 0.8%, and boil it for 45 minutes. Then rinse it repeatedly with deionized water until the pH value is close to 7, dry it in an oven at 70°C for 18 hours, remove the sericin, and obtain pure silk fibroin fiber. The sodium carbonate solution can efficiently dissolve sericin and achieve the separation of silk fibroin fibers, providing basic materials for subsequent modification and reinforcement.

[0043] Then the silk fibroin fibers were modified by soaking the dried silk fibroin fibers in a tris(hydroxymethyl)aminomethane hydrochloride) buffer solution containing 2.5% dopamine and stirring at room temperature for 18 hours. After rinsing with deionized water, the fibers were stretched 1.6 times on a stretching machine. Dopamine self-polymerizes under weak alkaline conditions to form a polydopamine coating about 8 nanometers thick, which significantly improves the compatibility between the fiber and the matrix; the stretching treatment increases the orientation of the fiber molecular chain and enhances the mechanical properties, thereby improving the feel of the wig, making it softer and smoother, and the friction coefficient with real human hair reaches 0.28, while enhancing the overall strength of the wig and reducing breakage during combing.

[0044] S2. Preparation of functional additives: preparation of photocatalytic self-cleaning nano-coating agent, negative ion releasing microspheres and thermosensitive color-changing pigment solution.

[0045] Specifically, the preparation process of the photocatalytic self-cleaning coating agent is as follows: B1. Preparation of nanoparticles: First, dissolve silver nitrate in deionized water to obtain a silver nitrate solution for standby use, and at the same time, add tetrabutyl titanate dropwise into anhydrous ethanol and stir evenly to obtain a tetrabutyl titanate solution, then add the silver nitrate solution dropwise into the tetrabutyl titanate solution, and at the same time add glacial acetic acid until the pH value of the tetrabutyl titanate solution mixed with the silver nitrate solution reaches 2-3 to obtain an acidic solution, and then stir the acidic solution in a water bath at 60-80°C for 4-6 hours to obtain a sol, and then transfer the sol to a crucible, and calcine in a muffle furnace at a temperature of 500-600°C for 2-3 hours to obtain nanoparticles; the sol-gel method is combined with calcination treatment to accurately control the particle size of the nanoparticles at 22-28 nanometers to improve its photocatalytic activity. The doping of silver ions can introduce impurity energy levels in the lattice of titanium dioxide, broaden its response range to light, and improve the separation efficiency of photogenerated carriers.

[0046] B2. Preparation of coating agent: Add the nanoparticles in B1 to a mixed solution containing a silane coupling agent and an acrylic resin, and ultrasonicate for 1-2 hours to uniformly disperse the nanoparticles in the solution to form a photocatalytic self-cleaning nano coating agent.

[0047] Among them, the silane coupling agent enhances the adhesion between the nanoparticles and the hair surface, and the acrylic resin, as a film-forming material, ensures the stability and uniformity of the coating. Under light conditions, the nanoparticles generate electron-hole pairs, and the holes oxidize and decompose the organic pollutants adsorbed on the hair surface. The decomposition rate can reach 86%, realizing the self-cleaning function of the wig, reducing the number of washing times and extending the service life. Under the action of light, the nanoparticles absorb photon energy and generate electron-hole pairs. The holes have strong oxidizing properties and can oxidize and decompose organic pollutants such as oil and sweat adsorbed on the hair surface into harmless substances such as carbon dioxide and water. One end of the silane coupling agent can react with the hydroxyl group on the surface of the nanoparticles, and the other end can combine with the group on the surface of the hair, so that the nanoparticles are firmly attached to the hair; the continuous film formed by the acrylic resin protects the nanoparticles, allowing them to continue to play a photocatalytic role and keep the wig clean.

[0048] Meanwhile, in S2, the preparation process of anion-releasing microspheres is as follows: C1. Tourmaline powder treatment: Grind the tourmaline powder balls into a ball mill until the particle size is less than 1 micron, then put them into a solution containing 1% silane coupling agent, stir and react for 2 hours, and perform surface modification on the tourmaline powder to improve its compatibility with polymers. Tourmaline is a natural mineral with spontaneous polarization characteristics and can continuously release negative ions.

[0049] C2. Preparation of microspheres: Mix the tourmaline powder treated in C1 with the polyvinyl alcohol solution in a mass ratio of 1:2, then add 0.6% of a cross-linking agent, which may be glutaraldehyde, and stir to form a slurry; C3. Drying: The slurry in C2 is made into microspheres in an environment of 130° C. by spray drying.

[0050] Among them, the spray drying method allows the slurry to be quickly dried into microspheres, and the particle size of the microspheres is controlled at 60-80 microns, ensuring the continuous and stable release of negative ions. The amount of negative ions released reaches 2300 / cm³, which not only further enhances the anti-static effect, but also purifies the air and improves the microenvironment around the wearer. Negative ions can neutralize the positive charge on the surface of the wig hair, further reducing the possibility of static electricity accumulation. At the same time, the negative ions released into the air can combine with harmful gases and dust in the air to make them settle, which plays a role in purifying the air and creating a healthier environment for the wearer.

[0051] The preparation process of the thermochromic pigment solution is as follows: D1. Mixing color-changing materials: adding crystal violet lactone, bisphenol A and tetradecanol in a mass ratio of 1:3:6 into a three-necked flask, and then stirring at 90° C. to obtain a color-changing material; D2. Pigment preparation: Mix the color-changing material obtained in D1 with silicone oil and sodium carboxymethyl cellulose, and then stir evenly to obtain a pigment solution.

[0052] Among them, silicone oil improves the fluidity and dispersibility of the pigment, and sodium carboxymethyl cellulose adjusts the viscosity of the solution to ensure that the pigment is evenly distributed in the wig hair. In the temperature range of 28-33°C, as the temperature changes, the color of the wig hair changes significantly, adding fashion and interest to the wig. Crystal violet lactone has a lactone structure at room temperature and is colorless; when the temperature rises, it reacts with bisphenol A, the lactone ring opens, and a conjugated system is formed to develop color. Tetradecanol is used as a solvent and temperature regulator to control the color change temperature range. Silicone oil reduces the interaction force between pigment molecules, making it easier to disperse; sodium carboxymethyl cellulose increases the viscosity of the solution, prevents pigment precipitation, ensures uniform distribution in the wig hair, achieves a stable temperature-sensitive color change effect, and meets the personalized needs of consumers.

[0053] S3, preparation of layered materials: Divide the recycled polyester into three parts, then melt them all through a twin-screw extruder, then add quantum dot-carbon nanotube composite antistatic agent and bioactive protein fiber reinforcement to the first part for stirring and ultrasonic dispersion to obtain the core layer material. Specifically, high-speed stirring allows the components to be fully mixed macroscopically, and ultrasonic dispersion further breaks up the agglomerates, ensuring that the composite antistatic agent and bioactive protein fiber reinforcement are evenly dispersed in the recycled polyester matrix to form a core layer material with antistatic and good feel. In addition, in a molten state, high-speed stirring allows the components to be preliminarily mixed, and the high-frequency vibration generated by ultrasonic dispersion can break up the agglomeration of the composite antistatic agent and the bioactive protein fiber reinforcement, so that they are evenly distributed in the recycled polyester in the form of single particles or fibers, ensuring the uniformity of the core layer performance.

[0054] Phase change flame retardant microcapsules are added to the second portion for stirring and ultrasonic dispersion to obtain a flame retardant layer material; specifically, the intelligent phase change flame retardant microcapsules are evenly distributed in the matrix through stirring and ultrasonic dispersion, providing reliable flame retardant properties for the wig. High-speed stirring and ultrasonic dispersion can make the intelligent phase change flame retardant microcapsules evenly dispersed in the recycled polyester melt, avoid microcapsule agglomeration, and ensure that the flame retardant effect can be evenly exerted during combustion.

[0055] Add photocatalytic self-cleaning nano coating agent, negative ion releasing microspheres and thermochromic pigment solution into the third portion and stir to obtain a functional layer material.

[0056] In the above steps, all prepared materials are divided into three parts and layered. The first part of the material is added with quantum dot-carbon nanotube composite antistatic agent and bioactive protein fiber reinforcement, and ultrasonic dispersion is performed to obtain the core layer material. The core layer material forms an antistatic layer 1 in the center of the final fiber to ensure that the wig can resist static electricity accumulation, and the bioactive protein fiber reinforcement modifies the mulberry silk protein fiber by dopamine, which enhances the flexibility and durability of the fiber. The second part of the material is added with phase change flame retardant microcapsules to obtain flame retardant layer materials. The function of the phase change material is to absorb heat in a high temperature environment to prevent the wig hair from overheating or damage caused by high temperature. At the same time, the flame retardant components in the microcapsules can release chemicals that inhibit the spread of flames when contacted with a fire source, greatly improving the safety of the wig. The third part of the material is added with a photocatalytic self-cleaning nano coating agent, anion-releasing microspheres and a thermosensitive color-changing pigment solution to obtain a functional layer material. The functional layer can not only provide a self-cleaning effect, but also allow the wig to continuously release negative ions during use, alleviating the wearer's discomfort from static electricity. At the same time, the thermosensitive color-changing effect provides a unique visual experience.

[0057] S4, spinning: the three materials prepared in S3 are respectively injected into a coaxial composite spinning nozzle having at least three layers of sleeve structure, and the multi-layer composite spinning technology is used for spinning, wherein the three layers of sleeve correspond to the core layer material, the flame retardant layer material and the functional layer material from the inside to the outside, respectively, and the coaxial composite spinning nozzle composites the materials of each layer according to a preset structure, and extrude them from the nozzle to obtain a primary fiber with a layered structure; like Figure 1-2 As shown, the cross-section of the primary fiber is circular, and it is arranged from the inside to the outside in sequence as an antistatic layer 1, a flame retardant layer 2 and an outer layer 3, the antistatic layer 1 is made of a core layer material, the flame retardant layer 2 is made of a flame retardant layer material, and the outer layer 3 is made of a functional layer material.

[0058] The wig hair prepared by multi-layer composite spinning technology through a coaxial composite spinning nozzle has a multi-layer composite structure. This multi-layer composite structure consists of a core layer, an intermediate flame retardant layer 2 and an outer functional layer, achieving the effect of functional integration and performance optimization. The principle is that different functional layers are isolated from each other and synergistically enhanced, and each functional material plays a role in its own layer, reducing mutual interference, while cooperating with each other to improve the overall performance.

[0059] The core layer is based on recycled polyester, with quantum dots-carbon nanotubes composite antistatic agent and bioactive protein fiber reinforcement added, which has excellent antistatic performance, good hand feel, and certain strength and toughness. In terms of antistatic, the quantum dots-carbon nanotubes composite antistatic agent forms a three-dimensional conductive network in the matrix. The quantum dots have high electron mobility due to the quantum confinement effect, and the carbon nanotubes have a high aspect ratio and excellent conductivity. The two work together to enable electrons to conduct quickly and neutralize charges. In terms of hand feel improvement, the silk protein fiber in the bioactive protein fiber reinforcement is itself flexible and biocompatible. After dopamine modification and stretching treatment, it is tightly bonded to the matrix, and the fiber molecular chains are arranged in an orderly manner. The polydopamine coating can also form hydrogen bonds with skin moisture, bringing a touch similar to that of real human hair. The principle of strength enhancement is that the stretching treatment increases the orientation of the fiber molecular chain and enhances the intermolecular force, so that it can withstand some external stress.

[0060] The middle flame retardant layer 2 is composed of recycled polyester and intelligent phase change flame retardant microcapsules, achieving efficient flame retardancy and intelligent response. The polyethylene glycol in the intelligent phase change flame retardant microcapsules undergoes a solid-liquid phase change at 40-60°C, absorbing a large amount of heat to reduce the surface temperature of the hair, slowing down the combustion rate, and the phase change is reversible. Phosphate flame retardants decompose at high temperatures, produce free radical capture agents in the gas phase to interrupt the combustion chain transmission, and form a carbonized layer in the condensed phase to block heat and oxygen. The urea-formaldehyde resin wall material wraps the core material, and the microcapsule particle size is evenly dispersed in the matrix to ensure stable flame retardancy.

[0061] The outer functional layer contains a photocatalytic self-cleaning nano coating agent, negative ion releasing microspheres and a thermochromic pigment, which has the effects of self-cleaning, negative ion releasing and thermochromic. Photocatalytic self-cleaning is because Ag-TiO2 nanoparticles generate electron-hole pairs under light, and the holes oxidize and decompose organic pollutants. Silver ion doping broadens the light response range and improves the carrier separation efficiency. Silane coupling agents and acrylic resins ensure the attachment and stability of nanoparticles. The tourmaline powder in the negative ion releasing microspheres spontaneously polarizes and releases negative ions, neutralizing the positive charge of hair and purifying the air. The crystal violet lactone in the thermochromic pigment reacts with bisphenol A to develop color when the temperature rises, tetradecanol adjusts the color change temperature, and silicone oil and sodium carboxymethyl cellulose ensure uniform distribution of the pigment, making the color change effect stable and obvious.

[0062] At the same time, in terms of preparation technology, multi-layer composite spinning technology is adopted. During the spinning process, each layer of material is injected simultaneously through a specially designed independent channel of the nozzle, and compounded in an orderly manner in the nozzle to form a wig primary fiber with a layered structure. This spinning method can accurately control the thickness and position of each layer, ensure the clear boundaries between the layers, and further ensure the independence and stability of the functions of each layer. At the same time, when preparing the layered materials, the materials of each layer are subjected to high-speed stirring and ultrasonic dispersion treatment, so that the functional materials in each layer are evenly dispersed in the matrix, laying the foundation for the full play of the functions of each layer.

[0063] Moreover, there is a synergistic effect between the layers. From the antistatic point of view, the negative ion-releasing microspheres in the outer functional layer continuously release negative ions, which can neutralize the static electricity generated by friction in the core layer. The conductive network formed by the quantum dot-carbon nanotube composite antistatic agent in the core layer enables electrons to conduct quickly, and the presence of negative ions further reduces the possibility of static electricity accumulation. The synergistic effect of the two significantly enhances the antistatic performance of the wig hair.

[0064] S5, stretching and heat setting treatment: the spun fibers obtained in S4 are stretched and heat set by stretching equipment and heat setting equipment to obtain the treated hair. Specifically, the spun spun fibers are stretched, the stretching multiple is set to 4 times, and the stretching temperature is 130°C. Stretching orients the fiber molecular chains and improves the strength and tensile properties of the fibers. During the stretching process, the fiber molecular chains are rearranged along the stretching direction under the action of force, and the interaction force between molecules is enhanced, thereby improving the strength and tensile properties of the fibers, making the wig hair tougher and less prone to deformation. After stretching, heat setting is performed at 190°C for 1.5 minutes. Heat setting eliminates the internal stress inside the fiber, stabilizes the morphology and structure of the fiber, and improves the dimensional stability of the wig hair. During the heat setting process, under the action of high temperature, the molecular chain segments inside the fiber obtain sufficient energy for rearrangement, eliminate the internal stress generated during the stretching process, make the fiber structure more stable, and not easily deformed due to external force or temperature changes in subsequent use.

[0065] S6, post-treatment: Plasma treatment is performed on the hair treated in S5, wherein argon is used as the working gas during the plasma treatment process; then the hair treated with plasma is immersed in a photocatalytic self-cleaning nano-coating agent to form a nano-coating on the surface of the hair to obtain the finished hair. Specifically, argon is used as the working gas, and the hair after heat setting is subjected to plasma treatment, with a power of 150W and a treatment time of 2 minutes. Plasma treatment introduces a large number of active groups on the surface of the hair, improves the surface hydrophilicity and roughness, and enhances the adhesion between the photocatalytic self-cleaning nano-coating agent and the hair. The high-energy particles in the plasma bombard the surface of the hair, causing the surface molecular chains to break to produce active groups, increase the surface roughness and hydrophilicity, so that the photocatalytic self-cleaning nano-coating agent can better adhere to the hair, and improve the stability and self-cleaning effect of the coating. The hair is immersed in a photocatalytic self-cleaning nano-coating agent so that the surface of the hair is evenly covered with a layer of nano-coating. Then it is dried in a 90°C oven for 15 minutes to solidify the coating and form a stable self-cleaning functional layer, further enhancing the self-cleaning effect of the wig. Drying in an oven allows the solvent in the coating to evaporate and the film-forming substances such as acrylic resin to solidify, forming a compact and stable nano coating, enhancing the photocatalytic performance and durability of the photocatalytic self-cleaning nano coating agent, and ensuring the long-term effectiveness of the self-cleaning function.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. An antistatic wig hair, characterized in that: It is made by melt spinning of the following components, including: recycled polyester, quantum dot-carbon nanotube composite antistatic agent, phase change flame retardant microcapsule, bioactive protein fiber reinforcement and functional additives; the quantum dot-carbon nanotube composite antistatic agent is composited by cadmium sulfide quantum dots and carboxylated single-walled carbon nanotubes through amidation reaction; the phase change flame retardant microcapsule is made of polyethylene glycol and phosphate flame retardant as core material and urea-formaldehyde resin as wall material; the bioactive protein fiber reinforcement is composed of dopamine-modified mulberry silk protein fiber.

2. The antistatic wig hair according to claim 1, characterized in that: The functional additive comprises a photocatalytic self-cleaning nano coating agent, which comprises a mixed solution prepared by mixing a silane coupling agent and an acrylic resin, wherein titanium dioxide nanoparticles are dispersed in the mixed solution, and the titanium dioxide nanoparticles contain silver ions.

3. The antistatic wig hair according to claim 1, characterized in that: The functional additives include negative ion releasing microspheres, the particle size of which is 50-100 microns, and are used to enable the wig hair to continuously release negative ions.

4. The antistatic wig hair according to claim 1, characterized in that: The functional additives include a temperature-sensitive color-changing pigment solution, which can allow the wig hair to change color according to temperature changes.

5. The antistatic wig hair according to claim 1, characterized in that: In the core material of the phase-change flame-retardant microcapsule, the mass ratio of the polyethylene glycol to the phosphate flame retardant is 3:1, and the urea-formaldehyde resin is wrapped around the core material by an in-situ polymerization method.

6. A method for preparing an antistatic wig hair, which is used to prepare the antistatic wig hair according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Raw material preparation: After the waste PET bottle flakes are recycled and regenerated, the recycled polyester is obtained as the matrix material through alcoholysis pretreatment, and then the quantum dot-carbon nanotube composite antistatic agent, phase change flame retardant microcapsule and bioactive protein fiber reinforcement are prepared respectively; S2. Preparation of functional additives: preparation of photocatalytic self-cleaning nano coating agent, negative ion releasing microspheres and thermosensitive color changing pigment solution; S3, preparation of layered materials: the recycled polyester is divided into three parts, and then all are melted through a twin-screw extruder, and then a quantum dot-carbon nanotube composite antistatic agent and a bioactive protein fiber reinforcement are added to the first part for stirring and ultrasonic dispersion to obtain a core layer material; Adding phase-change flame-retardant microcapsules into the second portion, stirring and ultrasonically dispersing the microcapsules to obtain a flame-retardant layer material; Adding a photocatalytic self-cleaning nano coating agent, negative ion releasing microspheres and a temperature-sensitive color-changing pigment solution into the third portion and stirring the mixture to obtain a functional layer material; S4, spinning: the three materials prepared in S3 are respectively injected into a coaxial composite spinning nozzle having at least three layers of sleeve structure, and the multi-layer composite spinning technology is used for spinning, wherein the three layers of sleeve correspond to the core layer material, the flame retardant layer material and the functional layer material from the inside to the outside, respectively, and the coaxial composite spinning nozzle composites the materials of each layer according to a preset structure, and extrude them from the nozzle to obtain a primary fiber with a layered structure; The cross section of the primary fiber is circular, and it is sequentially provided with an antistatic layer (1), a flame retardant layer (2) and an outer layer (3) from the inside to the outside, the antistatic layer (1) is made of a core layer material, the flame retardant layer (2) is made of a flame retardant layer material, and the outer layer (3) is made of a functional layer material; S5, stretching and heat setting treatment: the as-spun fibers obtained in S4 are stretched and heat-set by a stretching device and a heat setting device to obtain treated hair; S6, post-processing: plasma treatment is performed on the hair treated in S5, wherein argon gas is used as the working gas during the plasma treatment; the hair treated with plasma is then immersed in a photocatalytic self-cleaning nano-coating agent to form a nano-coating on the surface of the hair to obtain a finished hair.

7. The method for preparing antistatic wig hair according to claim 6, characterized in that: In S1, the preparation steps of the quantum dot-carbon nanotube composite antistatic agent are as follows: A1. Synthesis and preparation of cadmium sulfide quantum dots: under a nitrogen atmosphere, cadmium oleate and octadecene are added to a three-necked flask, slowly heated to 250-300°C to fully dissolve the cadmium oleate, and then pre-prepared sulfur powder is injected to obtain an octadecene solution. After the octadecene reaction is completed, the solution is naturally cooled to room temperature, and then excess ethanol is added to the reaction solution to precipitate the quantum dots. After multiple centrifugal separations and washings, impurities are removed to finally obtain pure cadmium sulfide quantum dots. The cadmium sulfide quantum dots are then added to an organic solvent to obtain a cadmium sulfide quantum dot solution. A2. Carboxylation of carbon nanotubes: firstly, concentrated sulfuric acid and concentrated nitric acid are mixed in a volume ratio of 3:1 to obtain a mixed acid solution, then single-walled carbon nanotubes are added to the mixed acid solution, and the mixed acid solution containing the single-walled carbon nanotubes is placed in an oil bath at 60-80° C. and stirred to oxidize the carbon atoms on the surface of the carbon nanotubes, and then the reaction is completed, filtered and washed to obtain oxidized carbon nanotubes, and finally the oxidized carbon nanotubes are dried in an oven to obtain carboxylated carbon nanotubes; A3. Composite: Disperse the carboxylated carbon nanotubes in N,N-dimethylformamide, and then perform ultrasonic treatment to obtain a suspension. Then, add the cadmium sulfide quantum dot solution prepared in A1 to the suspension, and add 1-ethyl-3-carbodiimide and N-hydroxysuccinimide as catalysts. Then, place the suspension in an oil bath for stirring reaction. Wait for the reaction to end, and obtain a quantum dot-carbon nanotube composite antistatic agent by centrifugal separation and filtration.

8. The method for preparing antistatic wig hair according to claim 6, characterized in that: In S2, the preparation process of the photocatalytic self-cleaning coating agent is as follows: B1. Preparation of nanoparticles: First, silver nitrate is dissolved in deionized water to obtain a silver nitrate solution for standby use, then tetrabutyl titanate is added dropwise into anhydrous ethanol and stirred evenly to obtain a tetrabutyl titanate solution, then the silver nitrate solution is added dropwise into the tetrabutyl titanate solution, and glacial acetic acid is added simultaneously until the pH value of the tetrabutyl titanate solution mixed with the silver nitrate solution reaches 2-3 to obtain an acidic solution, then the acidic solution is stirred and reacted at 60-80° C. for 4-6 hours to obtain a sol, and then the sol is calcined at a temperature of 500-600° C. for 2-3 hours to obtain nanoparticles; B2. Preparation of coating agent: Add the nanoparticles in B1 to a mixed solution containing a silane coupling agent and an acrylic resin, and disperse them by ultrasonication for 1-2 hours to obtain a coating agent.

9. The method for preparing antistatic wig hair according to claim 6, characterized in that: In S2, the preparation process of the negative ion releasing microspheres is as follows: C1. Tourmaline powder treatment: ball-mill the tourmaline powder to a particle size of less than 1 micron, put it into a solution containing 1% silane coupling agent, and stir for 2 hours to obtain surface-modified tourmaline powder; C2, microsphere preparation: the tourmaline powder treated in C1 is mixed with the polyvinyl alcohol solution in a mass ratio of 1:2, and then a cross-linking agent is added and stirred to form a slurry; C3. Drying: The slurry in C2 is made into microspheres in an environment of 130° C. by spray drying.

10. The method for preparing antistatic wig hair according to claim 6, characterized in that: In S2, the preparation process of the temperature-sensitive color-changing pigment solution is as follows: D1. Mixing color-changing materials: adding crystal violet lactone, bisphenol A and tetradecanol in a mass ratio of 1:3:6 into a three-necked flask, and then stirring at 90° C. to obtain a color-changing material; D2. Pigment preparation: Mix the color-changing material obtained in D1 with silicone oil and sodium carboxymethyl cellulose, and then stir evenly to obtain a pigment solution.

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