A bacteriostatic functional fabric for ultraviolet-responsive directional sweat transport, and its preparation method and application

Abstract

The present invention discloses an antibacterial functional fabric for directionally transporting sweat in response to ultraviolet light, as well as a preparation method and application thereof. The antibacterial functional fabric comprises a fabric substrate covered with nano-ZnO, an STA coating and a PDMS coating sequentially arranged on the inner surface of the fabric substrate, and an STA coating arranged on the outer surface of the fabric substrate. The antibacterial functional fabric of the present invention is not subjected to ultraviolet light irradiation when the daily sweat volume is low, and the fabric is completely hydrophobic, maintaining a slightly moist state on the skin surface to maintain skin comfort. When it is required to be used in an environment with high sweat volume, ultraviolet light activation is used to transform the antibacterial functional fabric from a double-sided hydrophobic state to a Janus fabric with a hydrophobic inner surface and a hydrophilic outer surface, thereby achieving directionally transporting sweat. The antibacterial functional fabric provided by the present invention can select the required surface state according to the specific application, and has higher flexibility.

Description

Technical Field

[0001] The present invention relates to a light-responsive multifunctional fabric for human sweat management, and in particular to an antibacterial functional fabric for directionally transporting sweat in response to ultraviolet light, and a preparation method and application thereof. Background Art

[0002] Traditional fabrics primarily focus on comfort and breathability, but they have limitations in terms of functionality and applicability. Traditional fabrics have high surface tension and moisture absorption, which can leave the skin moist and create an ideal environment for bacterial invasion and growth. Furthermore, prolonged bacterial attachment can lead to bacterial skin infections.

[0003] A Janus structure refers to a material or structure with two or more distinct physical and chemical properties, symmetries, or functional characteristics. Integrating a Janus structure into a fabric creates a double-sided design, allowing for the integration of different functional materials and technologies to meet diverse demands for comfort, functionality, and technical performance.

[0004] In terms of fluid management, Janus fabric, through its ingenious design of alternating hydrophilic and hydrophobic layers on both sides, effectively transports sweat from the hydrophobic layer to the hydrophilic layer and prevents reverse transport, offering significant advantages in regulating the moisture content of human skin. Furthermore, by utilizing different materials on each side of the fabric, it achieves multifunctional integration, avoiding a single function. Furthermore, Janus fabric can incorporate various antibacterial substances, such as metal oxides, quaternary ammonium compounds, and nanomaterials, which bind to the fabric surface to inhibit the growth of bacteria in sweat.

[0005] Therefore, in order to manage sweat on the human body surface and the associated bacterial nuisance, it is particularly important to adopt a multifunctional fabric with adjustable sweat management and antibacterial properties. Summary of the Invention

[0006] To address the shortcomings of the existing technology, the first objective of the present invention is to provide an antibacterial functional fabric that responsively transports sweat in a targeted manner in response to ultraviolet light. The antibacterial functional fabric provided by the present invention can significantly alter its surface hydrophilicity or hydrophobicity upon exposure to ultraviolet light and in a dark, dark, or high-temperature environment, while simultaneously exhibiting multiple functions, including antibacterial and targeted sweat transport.

[0007] The second object of the present invention is to provide a method for preparing an antibacterial functional fabric that can directionally transport sweat in response to ultraviolet light.

[0008] A third object of the present invention is to provide an antibacterial functional fabric that directional transports sweat in response to ultraviolet light, for use in clothing that comes into contact with human skin. When the antibacterial functional fabric of the present invention is used, in low-perspiration environments, without ultraviolet light exposure, the fabric is completely hydrophobic, maintaining a slightly moist surface on the skin, thereby maintaining skin comfort. When used in high-perspiration environments, ultraviolet light is activated, transforming the antibacterial functional fabric from a double-sided hydrophobic state to a Janus fabric with a hydrophobic inner surface and a hydrophilic outer surface, achieving directional transport of sweat. Because its sustained effect fully meets the human sweating time, after a period of high sweating, the hydrophilic side gradually returns to a contact angle that meets the skin's slightly moist condition over a long period of time. Furthermore, the hydrophilic side can be converted to hydrophobic by exposure to dark or high-temperature environments. Therefore, the desired surface state can be selected according to the specific application, providing greater flexibility.

[0009] In order to achieve the above object, the technical solution of the present invention is as follows:

[0010] The present invention discloses an antibacterial functional fabric for directionally transporting sweat in response to ultraviolet light. The antibacterial functional fabric comprises a fabric substrate covered with nano zinc oxide (ZnO), a stearic acid (STA) coating and a polydimethylsiloxane (PDMS) coating sequentially arranged on the inner surface of the fabric substrate, and a stearic acid (STA) coating arranged on the outer surface of the fabric substrate.

[0011] The antibacterial functional fabric provided by the present invention is covered with nano zinc oxide (ZnO) that is responsive to ultraviolet light and has excellent antibacterial properties. In addition, a double hydrophobic coating is provided on its inner surface (in the present invention, the inner surface refers to the surface that contacts the skin during application), which is sequentially provided with an STA coating and a PDMS coating. The outer surface is provided with only a single hydrophobic coating: the STA coating, forming coatings of different thicknesses on both sides, thereby achieving double-sided hydrophobicity of the fabric. Before responding to ultraviolet light, the fabric is completely hydrophobic, providing a comfortable microenvironment for the skin surface. After responding to ultraviolet light, ZnO, as a semiconductor material, has its own photocatalytic properties. When ZnO is exposed to ultraviolet light, photogenerated electrons and holes are generated on the ZnO surface. These excited electrons and holes can react with water molecules in the air, oxygen, or surface functional groups to form hydroxyl radicals (·OH), transforming the outer surface of the single-layer STA coating into a hydrophilic layer. On the inner surface, the hydrophobic layer is maintained due to the STA and PDMS double coating. Stearic acid provides the foundation for hydrophobicity, while PDMS further enhances the stability and durability of the coating, reinforcing the overall hydrophobic effect. This creates a wettability difference between the two surfaces, creating a surface energy gradient that provides a pathway and driving force for the directional transport of sweat. In the dark, oxygen atoms gradually replace the hydroxyl radicals adsorbed at the oxygen vacancies, causing them to revert from a hydrophilic state to a hydrophobic state. STA is further stabilized and the hydrophobicity is enhanced. High temperatures accelerate the desorption of hydroxyl radicals from the oxygen vacancies and the adsorption of oxygen by the oxygen vacancies. STA also promotes this oxidation kinetic process, causing the coating to revert from a hydrophilic state to a hydrophobic state.

[0012] In addition, due to the adsorption of the hydrophobic organic coating and the ZnO nanomaterial, the direct contact between the ZnO nanomaterial and the human skin is simply and conveniently isolated, avoiding the large-scale release of ZnO nanoparticles on the skin and causing irritation to the skin. PDMS / STA is safer and more comfortable for human skin due to its good biocompatibility and non-toxicity.

[0013] In this invention, the use of a stearic acid (STA) coating is key to achieving this hydrophilic-hydrophobic conversion. When ZnO and stearic acid are combined, the hydrophobic molecules of the stearic acid form a hydrophobic film on the ZnO surface. UV exposure can cause degradation or structural changes in the stearic acid surface, exposing the hydrophilic groups on the ZnO surface. If the chosen hydrophobic coating is very stable, completely covers the zinc oxide, and is not susceptible to decomposition or structural changes under UV conditions, the likelihood of a hydrophobic-hydrophobic conversion is minimized.

[0014] In a preferred embodiment, the fabric in the fabric substrate is selected from polyester fiber and cotton fabric.

[0015] The present invention discloses a method for preparing an antibacterial functional fabric capable of directionally transporting sweat in response to ultraviolet light. The method comprises the following steps: immersing a fabric substrate in a dopamine hydrochloride solution for polymerization to obtain a fabric substrate with polydopamine attached thereto; immersing the fabric substrate with polydopamine attached thereto in a mixed solution A containing a zinc source and urea for hydrothermal reaction to obtain a fabric substrate covered with nano zinc oxide (ZnO); immersing the fabric substrate covered with nano zinc oxide (ZnO) in a mixed solution B containing STA to obtain a fabric substrate with STA coatings on both surfaces; and finally coating a single surface of the fabric substrate with a mixed solution C containing PDMS to obtain the antibacterial functional fabric.

[0016] The preparation method of the present invention first immerses the fabric substrate in a dopamine hydrochloride solution, causing the dopamine hydrochloride solution to self-polymerize into polydopamine (PDA) on the fabric substrate surface. PDA forms a polydopamine film on the fabric substrate through chemical bonds with the fabric surface through certain functional groups and hydrogen bonding, thereby enhancing its adhesion and further increasing its hydrophilicity. Simultaneously, the addition of PDA acts as an intermediate layer to chelate zinc ions and provide growth sites, allowing in-situ growth and anchoring of zinc oxide. The introduced phenolic hydroxyl and amino groups provide a reducing environment, allowing metal ions to be reduced to metal nanoparticles on the surface. Subsequently, during the hydrothermal process, Zn² is provided by a zinc source. + Ions, urea provides ammonia (NH3) and hydroxide ions (OH - ), which increases the alkalinity of the solution, promotes the formation of zinc hydroxide, and further converts it into ZnO. ZnO nanoparticles provide a solid foundation for light response and antibacterial effects. Then, by immersing the fabric substrate in a mixed solution B containing STA, a double-surface STA-coated fabric substrate is obtained. STA is a long-chain fatty acid. This long-chain structure gives it strong hydrophobicity, which can significantly reduce the contact between water and the surface of the object, thereby providing hydrophobic properties. The carboxyl group (-COOH) in the stearic acid molecule can chemically react or physically adsorb with the surfaces of metals, metal oxides, etc. to form a hydrophobic coating. Finally, the PDMS coating is set in the form of single-sided coating. The presence of silicon-oxygen bonds and methyl groups in the PDMS molecules makes its surface strongly hydrophobic. By single-sided coating, coatings of different thicknesses on both sides are achieved, realizing double-sided hydrophobicity of the fabric.

[0017] In a preferred embodiment, the fabric substrate is first soaked in anhydrous ethanol and then in pure water, and then ultrasonically cleaned for 10-20 minutes, and then dried at 50-60° C. for 10-30 minutes. The pre-treatment cleaning step removes chemical residues on the surface of the fabric substrate itself.

[0018] In a preferred embodiment, the dopamine hydrochloride solution is composed of dopamine hydrochloride and tris(hydroxymethylaminomethane) hydrochloride (tris) solution. In the dopamine hydrochloride solution, the concentration of dopamine hydrochloride is 1-3 mg / mL, and the mass volume ratio of tris(hydroxymethylaminomethane) to water is 3.94-7.88 g:500 mL.

[0019] More preferably, the pH of the tris (hydroxymethyl)aminomethane hydrochloride) solution is 8-9.

[0020] In a preferred embodiment, the polymerization temperature is room temperature and the polymerization time is 20-24 hours.

[0021] In a preferred embodiment, in the mixed solution A containing a zinc source and urea, the zinc source is selected from at least one of zinc nitrate hexahydrate, zinc acetate, and zinc sulfate.

[0022] In a preferred embodiment, in the mixed solution A containing the zinc source and urea, the mass volume ratio of the zinc source to water is 0.38-1.15 g:50 mL, and the mass volume ratio of urea to water is 0.15-0.45 g:50 mL.

[0023] In a preferred embodiment, the temperature of the hydrothermal reaction is 110-135° C., and the time of the hydrothermal reaction is 10-15 h.

[0024] In a preferred embodiment, after the hydrothermal reaction is completed, a drying treatment is performed, wherein the drying treatment temperature is 40-80° C. and the drying time is 20-40 minutes.

[0025] In the actual operation process, the fabric substrate and the mixed solution A are added to the reactor for hydrothermal reaction. After the hydrothermal reaction is completed, the reactor is cooled to room temperature and placed in an electric blast oven for drying at a temperature of 50°C for 20-40 minutes to obtain a super-hydrophilic fabric substrate with in-situ grown ZnO nanoparticles.

[0026] In a preferred embodiment, the STA-containing mixed solution B consists of STA and ethanol, wherein the mass volume ratio of STA to ethanol is 0.025-0.1 g:30-50 mL.

[0027] In the actual operation process, the fabric substrate covered with nano-ZnO is completely immersed in the mixed solution B containing STA, and is dried after being immersed for multiple times, so that both surfaces of the fabric substrate covered with nano-ZnO are evenly covered with the STA coating.

[0028] In a preferred embodiment, the PDMS-containing mixed solution C consists of PDMS prepolymer, curing agent, and n-hexane, wherein the mass ratio of PDMS prepolymer to curing agent is 8-12:1, and the mass ratio of PDMS prepolymer to n-hexane is 0.03-0.12 g:10 g.

[0029] Preferably, the coating is carried out by spraying with a spray gun.

[0030] In a preferred embodiment, the antibacterial functional fabric is irradiated with ultraviolet light for 10-40 minutes, and the power of the ultraviolet light is 200-500 W. The ultraviolet light is activated to transform the antibacterial functional fabric from a double-sided hydrophobic state to a Janus fabric with a hydrophobic inner surface and a hydrophilic outer surface.

[0031] The present invention also provides an application of an antibacterial functional fabric that can directionally transport sweat in response to ultraviolet light, and the antibacterial functional fabric is used in clothing that comes into contact with human skin.

[0032] Beneficial effects

[0033] The present invention provides an antibacterial functional fabric that can transport sweat in a targeted manner in response to ultraviolet light. It possesses both hydrophilic and hydrophobic properties, allowing for the desired surface state to be selected based on specific applications, offering greater flexibility. When fabrics formed using the antibacterial functional fabric of the present invention are exposed to low daily sweat levels and are not exposed to ultraviolet light, the fabric remains completely hydrophobic, maintaining a slightly moist surface on the skin, thereby maintaining skin comfort. When applied to high sweat levels, ultraviolet light is activated, transforming the antibacterial functional fabric from a double-sided hydrophobic state to a Janus fabric with a hydrophobic inner surface and a hydrophilic outer surface, achieving directional transport of sweat. Because its sustained effect fully meets the human sweating time, after a period of high sweating, the hydrophilic side gradually returns to a contact angle that satisfies the skin's slightly moist condition over a prolonged period. Furthermore, the hydrophilic side can be converted to hydrophobic by exposure to dark or high-temperature environments. Furthermore, the excellent antibacterial properties of ZnO effectively prevent bacteria from accumulating in sweat, providing a dry and comfortable microenvironment.

[0034] The technical solution provided by the present invention is highly operable, simple and environmentally friendly, and has a wider range of applicable scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of the antibacterial functional fabric provided by the present invention;

[0036] Figure 2 Schematic diagram of the preparation process of the present invention;

[0037] Figure 3 The contact angle photos of the super-hydrophobic part and the contact angle photos of the super-hydrophilic part before and after the ultraviolet response in Example 1 of the present invention are shown;

[0038] Figure 4 This is a schematic diagram of the fiber directional transport principle in Example 1 of the present invention;

[0039] Figure 5This is a photo of the directional transport of a 9µL droplet in Example 1 of the present invention;

[0040] Figure 6 This is a photo of a plate coating of Staphylococcus aureus and Escherichia coli cultured on the original fabric and Janus fabric prepared in Example 1 of the present invention;

[0041] Figure 7 This is the recovery diagram of the present invention in a dark and light-proof environment in Example 1;

[0042] Figure 8 This is a high temperature recovery diagram in Example 1 of the present invention;

[0043] Figure 9 This is a graph showing the air permeability performance of the present invention before and after ultraviolet light irradiation in Example 1. DETAILED DESCRIPTION

[0044] The present invention will be further described with reference to the following examples. It should be understood that these examples are intended only to illustrate the specific embodiments of the present invention and are not intended to limit the scope of the present invention. After reading this specification, those skilled in the art may make similar improvements and extensions without departing from the core content of the present invention, and these modifications should still fall within the scope of the claims appended hereto.

[0045] Example 1

[0046] The present invention provides a method for preparing an antibacterial functional fabric that can transport sweat in a directional manner in response to ultraviolet light, such as Figure 2 The specific steps are as follows:

[0047] S1. Cut a 2×2 square of polyester fiber and place it in 50 mL of ethanol and then pure water for 10 minutes of ultrasonic treatment. After cleaning, remove the fiber with tweezers, place it on a 10×10 cm acrylic substrate, and dry it in a 50°C oven.

[0048] S2. Prepare a 2mg / mL dopamine hydrochloride solution. First, prepare a tris buffer solution by weighing 7.88g of tris, adding 100mL of ultrapure water, and then diluting to 500mL. Prepare a NaOH solution and adjust the pH of the tris solution to 8.5 to create a suitable acid-base environment for the subsequent addition of dopamine hydrochloride. Finally, add 0.1g of dopamine hydrochloride. Place the cleaned polyester fiber in the dopamine solution, polymerize at room temperature for 24 hours, and then dry in an oven. The pretreatment is complete.

[0049] S3. Prepare a hydrothermal synthesis solution by weighing 0.75 g and 0.3 g of Zn(NO3)2·6H2O and urea, respectively. Mix them evenly on a magnetic stirrer and place them together with polyester fibers to which polydopamine has been attached in a polytetrafluoroethylene autoclave. The reaction temperature is 120°C and the reaction time is 13 h. After the reaction, use ultrapure water to wash away excess surface substances and place them in an oven for further drying.

[0050] S4. Prepare the STA mixed solution by dissolving 0.0712 g of stearic acid granules in 50 mL of anhydrous ethanol. Prepare the PDMS mixed solution by pre-mixing PDMS prepolymer and curing agent at a mass ratio of 10:1, and then dissolve 0.06 g of PDMS in 20 g of n-hexane solution.

[0051] S5. After the two mixed solutions are prepared, immerse the ZnO-covered fabric in the STA mixed solution. After dipping both sides several times, take it out and dry it. Then use a spray gun to spray the PDMS solution on one side of the fabric in small amounts and multiple times.

[0052] S6. Take out the prepared double-sided hydrophobic fabric, put it into a UV irradiation machine, and irradiate one side for 20 minutes, finally obtaining a Janus fabric with a double-sided hydrophilic-hydrophobic gradient.

[0053] Related performance tests are as follows

[0054] 1) Hydrophilicity and hydrophobicity test

[0055] The present invention provides a functional fabric that can transport sweat and inhibit bacteria in a directional manner with an intelligent response to ultraviolet light. Based on the characteristics of the present invention, its hydrophilic and hydrophobic properties change before and after ultraviolet light response, such as Figure 3 Before UV light response, the contact angle of the ZnO / STA side of the sample was measured to be 133.6°, indicating good hydrophobicity. However, after 20 minutes of UV light response, the contact angle of the ZnO / STA side of the sample was measured to be 0°, indicating superhydrophilicity.

[0056] 2) Directional transport performance test

[0057] The present invention provides a functional fabric that intelligently responds to ultraviolet light, transports sweat in a directional manner, and inhibits bacteria. Based on the characteristics of the present invention, after the hydrophilicity and hydrophobicity on one side change in response to light, a difference in hydrophilicity and hydrophobicity is generated on both sides of the fabric. Therefore, a gradient difference in surface energy is generated on both sides, driving the liquid to move from low surface energy to high surface energy. Figure 4As shown: Simulated sweat was applied to the Janus fabric, simulating its normal human perspiration. The double-sided hydrophobic fabric was placed in a UV irradiator for 20 minutes, and after one side was converted to a hydrophilic state, it was fixed on a fixture. Simulated sweat was dripped onto the hydrophobic side, and the transmission speed was recorded within 8 seconds. When dripped in the opposite direction, the fabric effectively blocked the transport of liquid, and it quickly spread across the surface, as shown in the figure. Figure 5 shown.

[0058] 3) Antibacterial performance test

[0059] The present invention provides a functional fabric that intelligently responds to ultraviolet light, transports sweat in a targeted manner, and inhibits bacteria. The antibacterial properties of this fabric are derived from ZnO nanoparticles grown on a polyester fiber substrate through hydrothermal synthesis. ZnO nanoparticles typically have a surface positive charge, enabling them to interact with the negatively charged bacterial cell wall through electrostatic interaction. This charge interaction promotes the binding of ZnO particles to bacteria, further enhancing the antibacterial effect.

[0060] For Gram-negative and Gram-positive bacteria, we selected target species, namely Escherichia coli and Staphylococcus aureus. Figure 6 As shown, the sample has a very good antibacterial effect on both bacteria.

[0061] 4) Reply performance test

[0062] The Janus fabric has the properties of darkness recovery and high temperature recovery, such as Figure 7 As shown in FIG, in a dark environment, the fabric can restore its original contact angle in about 10 days; Figure 8 As shown, by testing the recovery to the original contact angle at different temperatures, it can be clearly seen that with the increase of temperature, the required recovery time decreases.

[0063] 5) Air permeability test

[0064] Prepare the original fabric, the fabric without UV exposure, and the Janus fabric after UV exposure. Adjust the heating table to 37°C and the room temperature to 25°C. Weigh 50mL of ultrapure water into a beaker. After the water is heated to 37°C, start recording every 30 minutes. Figure 9 As shown in the figure, by comparing the water vapor permeability of the original fabric, hydrophobic fabric (fabric without UV light) and Janus fabric, the water vapor permeability of Janus fabric is significantly higher than that of the other two fabrics. This is because the different surface properties on its two sides optimize the passage path of water vapor; while the water vapor permeability of the hydrophobic fabric is slightly higher than the original fabric, which may be because the low surface energy reduces the retention of some liquid water on the surface and promotes the diffusion of water vapor.

[0065] Example 2

[0066] Other conditions in Example 2 were the same as those in Example 1, except that during the hydrophobic layer construction stage, the STA concentration for constructing the STA layer was 0.01 M, the mass ratio of PDMS to n-hexane solution was 0.12 g:20 g, the resulting contact angle was 134.2°, the UV irradiation time was 1 h, 5 µL of liquid was added dropwise, and the measured directional transport time was approximately 30 s.

[0067] Example 3

[0068] The other conditions in Example 2 were identical to those in Example 1, except that during the hydrophobic layer construction phase, the STA concentration was 0.0025 M, and the mass ratio of PDMS to n-hexane solution was 0.03 g:20 g. All other conditions were the same as in Example 1. The resulting contact angle was 130°, the UV irradiation time was 20 min, and the directional transport time measured was approximately 20 s after 5 µL of liquid was added.

[0069] Comparative Example 1

[0070] The other conditions in this comparative example were identical to those in Example 1, except that STA was used exclusively for double-sided impregnation to create the hydrophobic coating. Due to the porosity of the fabric, UV light penetrated through the pores and affected the other side, causing the hydrophobic coating on the other side to become unstable, with the hydrophobic angle dropping sharply and even becoming hydrophilic (<90°).

[0071] Comparative Example 2

[0072] The other conditions in this comparative example were the same as those in Example 1, except for the mass ratio of the PDMS layer: 0.3 g PDMS to 20 g n-hexane solution. All other conditions were the same as in Example 1. This comparative example did not experience a transition from a hydrophobic state to a superhydrophilic state after 1.5 hours of UV exposure. This is because the high concentration of the PDMS solution further reinforced the hydrophobicity of the ZnO / STA side by penetrating the pores.

[0073] Comparative Example 3

[0074] The other conditions in this comparative example were the same as those in Example 1, except for the mass ratio of the PDMS layer, which was 0.01 g PDMS to 20 g n-hexane solution. All other conditions were the same as in Example 1. After 10 minutes of UV irradiation, the backside hydrophobic angle also decreased significantly. This is because the hydrophobic layer is not stable enough, allowing UV light to pass through the pores of the fabric and continuously affect the backside.

Claims

1. An antibacterial functional fabric for directional sweat transport in response to ultraviolet light, characterized by: The antibacterial functional fabric consists of a fabric substrate covered with nano-ZnO, a stearic acid STA coating and a polydimethylsiloxane PDMS coating sequentially arranged on the inner surface of the fabric substrate, and a stearic acid STA coating arranged on the outer surface of the fabric substrate; The fabric in the fabric substrate is selected from one of polyester fiber and cotton fabric; The preparation method of the antibacterial functional fabric is: The fabric substrate is immersed in a dopamine hydrochloride solution for polymerization to obtain a fabric substrate with polydopamine attached, and the fabric substrate with polydopamine attached is then immersed in a mixed solution A containing a zinc source and urea for hydrothermal reaction to obtain a fabric substrate covered with nano-ZnO, and the fabric substrate covered with nano-ZnO is then immersed in a mixed solution B containing STA to obtain a fabric substrate with STA coating on both surfaces, and finally a single surface of the fabric substrate is coated with a mixed solution C containing PDMS to obtain an antibacterial functional fabric; The PDMS-containing mixed solution C consists of PDMS prepolymer, curing agent and n-hexane; Prepare mixed solution B containing STA by dissolving 0.0712 g of stearic acid particles in 50 mL of anhydrous ethanol. Prepare mixed solution C containing PDMS by pre-mixing PDMS prepolymer and curing agent in a mass ratio of 10:1, and then dissolve 0.06 g of PDMS in 20 g of n-hexane solution. Alternatively, the STA concentration for constructing the STA layer is 0.01 M, and the mass ratio of PDMS to n-hexane solution is 0.12 g:20 g. Alternatively, the STA concentration for constructing the STA layer is 0.0025 M, and the mass ratio of PDMS to n-hexane solution is 0.03 g:20 g.

2. The antibacterial functional fabric for ultraviolet-responsive directional sweat transport according to claim 1, characterized in that: The fabric substrate is first soaked in anhydrous ethanol and pure water in sequence, and then ultrasonically cleaned for 10-20 minutes. The cleaned fabric substrate is then dried at 50-60° C. for 10-30 minutes.

3. The antibacterial functional fabric for directional sweat transport in response to ultraviolet light according to claim 1, characterized in that: The dopamine hydrochloride solution is composed of dopamine hydrochloride and tris solution. In the dopamine hydrochloride solution, the concentration of dopamine hydrochloride is 1-3 mg / mL, and the mass volume ratio of tris(hydroxymethyl)aminomethane to water is 3.94-7.88 g:500 mL; The pH of the tris solution is 8-9; The polymerization temperature is room temperature, and the polymerization time is 20-24 hours.

4. The antibacterial functional fabric for directional sweat transport in response to ultraviolet light according to claim 1, characterized in that: In the mixed solution A containing a zinc source and urea, the zinc source is selected from at least one of zinc nitrate hexahydrate, zinc acetate, and zinc sulfate; In the mixed solution A containing zinc source and urea, the mass volume ratio of zinc source to water is 0.38-1.15 g:50 mL, and the mass volume ratio of urea to water is 0.15-0.45 g:50 mL; The temperature of the hydrothermal reaction is 110-135°C, and the time of the hydrothermal reaction is 10-15h; After the hydrothermal reaction is completed, a drying treatment is performed. The drying treatment temperature is 40-80° C. and the time is 20-40 minutes.

5. The antibacterial functional fabric for directional sweat transport in response to ultraviolet light according to claim 1, characterized in that: The coating method is spraying with a spray gun.

6. The antibacterial functional fabric for directional sweat transport in response to ultraviolet light according to claim 1, characterized in that: The antibacterial functional fabric is irradiated with ultraviolet light for 10-40 minutes, wherein the power of the ultraviolet light is 200-500W.

7. The use of the antibacterial functional fabric for directional sweat transport in response to ultraviolet light according to claim 1, characterized in that: The antibacterial functional fabric is used in clothing that comes into contact with human skin.

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