Antibacterial functional fabric capable of directionally transporting sweat in response to ultraviolet light as well as preparation method and application of antibacterial functional fabric

Abstract

The invention discloses a bacteriostatic functional fabric capable of directionally transporting sweat through ultraviolet light response and a preparation method and application thereof.The bacteriostatic functional fabric is composed of a fabric base material covered with nano ZnO, an STA coating, a PDMS coating and an STA coating arranged on the outer surface of the fabric base material, the STA coating and the PDMS coating are sequentially arranged on the inner surface of the fabric base material, and the STA coating is arranged on the outer surface of the fabric base material. When the amount of sweat is low in daily life, ultraviolet irradiation is not carried out, the fabric is completely in a hydrophobic state, and the surface of the skin is kept in a slightly wet state, so that the comfort of the skin is kept; when the antibacterial functional fabric needs to be applied to a high-sweat environment, ultraviolet light is utilized for activation, the antibacterial functional fabric is converted into a Janus fabric with a hydrophobic inner surface and a hydrophilic outer surface from a double-face hydrophobic state, directional transportation of sweat is achieved, the required surface state of the antibacterial functional fabric can be selected according to specific application, and the antibacterial functional fabric has higher flexibility.

Description

Technical Field

[0001] The 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 mainly focus on comfort and breathability, but they have certain limitations in terms of function and application scenarios. Traditional fabrics have high surface tension and moisture absorption capacity, which makes the skin easily exposed to moisture and provides an ideal environment for bacterial invasion and growth. In addition, long-term bacterial attachment can also lead to bacterial infection of human skin.

[0003] Janus structure refers to a structure or material with two or more different physical and chemical properties, symmetry or functional properties. Combining Janus structure with fabric makes it have the characteristics of double-sided design, and can combine different functional materials and technologies to meet the multiple needs of fabric in terms of comfort, functionality and technology.

[0004] In liquid management, Janus fabrics, through the clever design of alternating hydrophilic and hydrophobic layers on both sides, effectively transport sweat from the hydrophobic layer to the hydrophilic layer and prevent its reverse transport, which has significant advantages in regulating the humidity of human skin. In terms of function, by using different materials on both sides of the fabric, the purpose of multifunctional integration can be achieved to avoid the single function of the fabric. In addition, Janus fabrics can inhibit the growth of bacteria in sweat by adding different antibacterial substances such as metal oxides, quaternary ammonium salt compounds, nanomaterials, etc., which are combined on the surface of the fabric.

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

[0006] In view of the shortcomings of the prior art, the first object of the present invention is to provide an antibacterial functional fabric that can transport sweat in a directional manner in response to ultraviolet light. The antibacterial functional fabric provided by the present invention can significantly change the hydrophilicity or hydrophobicity of the surface through ultraviolet light irradiation and in a dark or high temperature environment, and has multiple functions such as antibacterial and directional transport.

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

[0008] The third object of the present invention is to provide an application of an antibacterial functional fabric for directional transport of sweat in response to ultraviolet light, and the antibacterial functional fabric is used in clothing that contacts human skin. When the antibacterial functional fabric of the present invention is used to form a fabric, when the amount of sweat is low in daily life, no ultraviolet light irradiation is performed, the fabric is completely hydrophobic, and the skin surface is kept slightly moist to maintain the comfort of the skin; when it is needed to be applied to a high sweat environment, ultraviolet light is activated to transform the antibacterial functional fabric from a double-sided hydrophobic state into a Janus fabric with a hydrophobic inner surface and a hydrophilic outer surface, so as to achieve directional transport of sweat. And when its continuous effect fully meets the sweating time of the human body, after experiencing a high sweating period, the hydrophilic side will gradually restore the contact angle for a long time, thereby meeting the slightly moist condition of the skin, and at the same time, through a dark light-proof environment or a high temperature environment, the hydrophilic side can also be converted into hydrophobic, so the required surface state can be selected according to the specific application, with higher flexibility.

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

[0010] The antibacterial functional fabric provided by the present invention is covered with nano zinc oxide (ZnO) which is UV-responsive and has excellent antibacterial properties. In addition, a double hydrophobic coating is arranged on its inner surface (the inner surface in the present invention refers to the surface in contact with the skin during application), which is sequentially STA coating and PDMS coating, and only a single hydrophobic coating is arranged on the outer surface: STA coating, forming coatings of different thicknesses on both sides, thereby achieving double-sided hydrophobicity of the fabric. Before the UV light response, the fabric is completely in a hydrophobic state, providing a comfortable microenvironment for the skin surface, and after the UV light response, 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 surface of ZnO. These excited electrons and holes can react with water molecules, oxygen or surface functional groups in the air to form hydroxyl radicals (·OH), thereby converting the outer surface containing a single layer of STA coating into a hydrophilic layer. On the inner surface, due to the setting of STA and PDMS double coating, stearic acid provides basic hydrophobic properties, and PDMS further enhances the stability and durability of the coating, thereby reinforcing the effect of the entire hydrophobic layer. Therefore, the hydrophobicity will be maintained, thereby constructing a double-sided wettability difference. The surface energy gradient formed provides a path and power for the directional transport of sweat. In a dark and light-proof environment, oxygen atoms can gradually replace the hydroxyl radicals adsorbed at the oxygen vacancy, thereby restoring it from a hydrophilic state to a hydrophobic state, and STA will be further stabilized and the hydrophobicity will be enhanced. Under high temperature conditions, the desorption of hydroxyl radicals from oxygen vacancies and the adsorption of oxygen by oxygen vacancies can be accelerated. At the same time, STA can also promote this oxidation kinetic process, thereby restoring it from a hydrophilic state to a hydrophobic state.

[0011] 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.

[0012] In the present invention, the use of stearic acid (STA) coating is the key to achieve the conversion of hydrophilicity and hydrophobicity. When ZnO is compounded with stearic acid, the hydrophobic molecules of stearic acid will form a hydrophobic film on the surface of ZnO. Ultraviolet irradiation may cause the degradation of the stearic acid surface or change its morphological structure, so that the hydrophilic groups on the surface of ZnO are exposed. If the selected hydrophobic coating is very stable and completely covers the zinc oxide, and is not easy to decompose or change its structure under ultraviolet conditions, then the possibility of hydrophilicity and hydrophobicity conversion is very small.

[0013] In a preferred embodiment, the fabric in the fabric substrate is selected from polyester fiber and cotton fabric.

[0014] The invention discloses a method for preparing an antibacterial functional fabric capable of transporting sweat in a directional manner 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; then 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); then 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.

[0015] The preparation method of the present invention first immerses the fabric substrate in a dopamine hydrochloride solution, so that the dopamine hydrochloride solution self-polymerizes on the surface of the fabric substrate to form polydopamine (PDA). PDA forms a layer of polydopamine film on the fabric substrate through chemical bonds with the fabric surface through some functional groups and hydrogen bonds, thereby enhancing its adhesion and further improving its hydrophilicity. At the same time, the addition of PDA acts as an intermediate layer to chelate zinc ions as a growth site, in-situ growth and anchoring of zinc oxide, and the introduction of phenolic hydroxyl and amine groups provides a reducing environment, so that metal ions can be reduced to metal nanoparticles on the surface. Subsequently, in the hydrothermal process, Zn² is provided by a zinc source. + ions, urea provides ammonia (NH 3 ) and hydroxide ions (OH - ), which increases the alkalinity of the solution and promotes the formation of zinc hydroxide, which is further converted into ZnO. ZnO nanoparticles provide a solid foundation for light response and antibacterial effects. Then, by immersing in a mixed solution B containing STA, a fabric substrate with STA coating on both surfaces 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 surface 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. Through single-sided coating, coatings of different thicknesses on both sides are achieved, thereby achieving double-sided hydrophobicity of the fabric.

[0016] In a preferred embodiment, the fabric substrate is first immersed in anhydrous ethanol and pure water in sequence, then ultrasonically cleaned for 10-20 minutes, and then dried at 50-60° C. for 10-30 minutes. The chemical agent residue on the surface of the fabric substrate itself is removed by the pre-treatment cleaning step.

[0017] In a preferred embodiment, the dopamine hydrochloride solution is composed of dopamine hydrochloride and tris(hydroxymethylaminomethane) hydrochloride (tris) solution, wherein the concentration of dopamine hydrochloride in the dopamine hydrochloride solution is 1-3 mg / mL, and the mass volume ratio of tris(hydroxymethylaminomethane) to water is 3.94-7.88 g:500 mL.

[0018] Further preferably, the pH of the tris (hydroxymethyl)aminomethane hydrochloride) solution is 8-9.

[0019] In a preferred embodiment, the polymerization temperature is room temperature and the polymerization time is 20-24 hours.

[0020] 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.

[0021] In a preferred embodiment, 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.

[0022] 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.

[0023] In a preferred embodiment, after the hydrothermal reaction is completed, a drying treatment is performed, and the drying treatment temperature is 40-80° C. and the time is 20-40 minutes.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Preferably, the coating is carried out by spraying with a spray gun.

[0029] In a preferred solution, 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 antibacterial functional fabric is activated by ultraviolet light to transform from a double-sided hydrophobic state to a Janus fabric with a hydrophobic inner surface and a hydrophilic outer surface.

[0030] 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.

[0031] Beneficial Effects The present invention provides an antibacterial functional fabric that can transport sweat in a directional manner by ultraviolet response, and has both hydrophilic and hydrophobic properties. The required surface state can be selected according to the specific application, and has higher flexibility. When the antibacterial functional fabric of the present invention is used, the fabric is completely hydrophobic when the daily sweat volume is low, and no ultraviolet light is irradiated. The fabric is completely hydrophobic, and the skin surface is kept slightly moist to maintain the comfort of the skin; when it is needed to be applied to a high sweat environment, 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, so as to achieve directional transport of sweat. And when its continuous effect fully meets the human body sweating time, after experiencing a high sweating period, the hydrophilic side will gradually restore the contact angle for a long time, thereby meeting the skin slightly moist conditions, and at the same time, the hydrophilic side can also be converted into hydrophobic through a dark light-proof environment or a high temperature environment. And based on the excellent antibacterial properties of ZnO, it can effectively prevent bacteria from gathering in sweat and provide a dry and comfortable microenvironment.

[0032] 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

[0033] Figure 1 A schematic diagram of the structure of the antibacterial functional fabric provided by the present invention; Figure 2 It is a schematic diagram of the preparation process of the present invention; 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; Figure 4 This is a schematic diagram of the fiber directional transport principle in Example 1 of the present invention; Figure 5 This is a photo of the directional transport of a 9μL droplet in Example 1 of the present invention; Figure 6The plate coating photos of Staphylococcus aureus and Escherichia coli cultured on the original fabric and Janus fabric prepared in Example 1 of the present invention; Figure 7 This is the recovery diagram of the present invention in a dark and light-proof environment in Example 1; Figure 8 This is a high temperature recovery diagram in Example 1 of the present invention; Fig. 9 This is a graph of the air permeability performance of the present invention before and after ultraviolet light exposure in Example 1. DETAILED DESCRIPTION

[0034] The present invention will be further described in conjunction with the following examples. It should be understood that these examples are only used 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 can make similar improvements and extensions without departing from the core content of the present invention, and these modifications are still within the scope of protection of the appended claims of the present application.

[0035] Example 1 The present invention provides a method for preparing an antibacterial functional fabric for directional transport of sweat in response to ultraviolet light, such as Figure 2 As shown, the specific steps are as follows: S1, cut 2×2 polyester fibers, put them into 50mL ethanol and pure water for 10 minutes of ultrasound, clean them, take out the fibers with tweezers, place them on a 10×10cm acrylic substrate and dry them in a 50℃ oven; S2. Prepare a dopamine hydrochloride solution with a concentration of 2 mg / mL. First, prepare tris buffer, that is, weigh 7.88g of tris, add 100mL of ultrapure water, and then dilute to 500mL, prepare NaOH solution to adjust the pH value of the tris solution to 8.5, prepare a suitable acid-base environment for the subsequent addition of dopamine hydrochloride, and finally add 0.1g of dopamine hydrochloride. Put the cleaned polyester fiber into the dopamine solution, polymerize at room temperature for 24 hours, and then put it in an oven to dry, and the pretreatment is completed; S3, prepare the hydrothermal synthesis solution, weigh 0.75g and 0.3g of Zn(NO 3 ) 2 6H 2 O and urea were mixed evenly on a magnetic stirrer and then placed in a polytetrafluoroethylene high-pressure reactor together with polyester fibers to which polydopamine had been attached. The reaction temperature was 120°C and the reaction time was 13 hours. After the reaction, the excess material on the surface was washed with ultrapure water and the fiber was placed in an oven for drying again. S4, prepare STA mixed solution, take 0.0712g stearic acid particles and dissolve them in 50mL anhydrous ethanol; prepare PDMS mixed solution, pre-prepare PDMS prepolymer and curing agent with a mass ratio of 10:1, and then take 0.06g PDMS and dissolve it in 20g n-hexane solution; S5. After the two mixed solutions are prepared, the ZnO-covered fabric is immersed in the STA mixed solution. After being immersed on both sides for multiple times, it is taken out and dried. Then, the PDMS solution is sprayed on one side of the fabric with a spray gun in small amounts and multiple times. S6. Take out the prepared double-sided hydrophobic fabric, put it into a UV irradiation machine, and irradiate it on one side for 20 minutes, so as to finally obtain a Janus fabric with a double-sided hydrophilic-hydrophobic gradient.

[0036] The relevant performance tests are as follows 1) Hydrophilicity and hydrophobicity test The present invention provides a functional fabric that can transport sweat and inhibit bacteria in a directional manner with 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 the UV light response, the contact angle of the ZnO / STA side of the sample was measured to be 133.6°, which has good hydrophobic properties. After 20 minutes of UV light response, the contact angle of the ZnO / STA side of the sample was measured to be 0°, which has super hydrophilicity.

[0037] 2) Directional transport performance test The present invention provides a functional fabric that can transport sweat and inhibit bacteria in a directional manner with intelligent response to ultraviolet light. Based on the characteristics of the present invention, after the hydrophilic and hydrophobic states on one side change after light response, a difference in hydrophilic and hydrophobic states 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 in the direction from low surface energy to high surface energy. Figure 4 As shown: simulated sweat was applied to the Janus fabric to simulate the normal perspiration of the fabric. 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 on the hydrophobic side, and the transmission speed was recorded to be within 8 seconds. When dripped in the opposite direction, the fabric effectively blocked the transport of liquid and quickly expanded on the surface, as shown in Figure 1. Figure 5 shown.

[0038] 3) Antibacterial performance test 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. The antibacterial property of the present invention is due to the ZnO-NPs grown on a polyester fiber substrate through hydrothermal synthesis. The surface of ZnO nanoparticles usually carries a certain positive charge, which enables them to interact with the negatively charged bacterial cell wall through electrostatic interaction. This charge interaction can promote the combination of ZnO particles and bacteria, further increasing the antibacterial effect.

[0039] For Gram-negative and Gram-positive bacteria, we selected the target species, namely Escherichia coli and Staphylococcus aureus. Figure 6 As shown, the sample has very good antibacterial effect on both bacteria.

[0040] 4) Reply performance test The Janus fabric has the properties of dark recovery and high temperature recovery, such as Figure 7 As shown in FIG. 1 , 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.

[0041] 5) Air permeability test Prepare the original fabric, the fabric without UV light, and the Janus fabric after UV light, adjust the heating table to 37℃, control the room temperature at 25℃, weigh 50mL of ultrapure water into a beaker, and start recording every 30 minutes after the water temperature rises to 37℃. Fig. 9 As shown in the figure, by comparing the water vapor permeability of the original fabric, the hydrophobic fabric (the fabric not irradiated with UV light) and the Janus fabric, the water vapor permeability of the 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 hydrophobic fabric is slightly higher than the original fabric, which may be due to the low surface energy reducing the retention of some liquid water on the surface and promoting the diffusion of water vapor.

[0042] Example 2 The other conditions of Example 2 are the same as those of Example 1, except that in the hydrophobic layer construction stage, the STA concentration of the STA layer is 0.01 M, the mass ratio of PDMS to n-hexane solution is 0.12 g:20 g, the obtained contact angle is 134.2°, the UV irradiation time is 1 h, 5 µL of liquid is added dropwise, and the measured directional transport time is approximately 30 s.

[0043] Example 3 The other conditions of Example 2 are the same as those of Example 1, except that in the hydrophobic layer construction stage, the STA concentration of the STA layer is 0.0025M, the mass ratio of PDMS to n-hexane solution is 0.03g:20g, and the rest are the same as those of Example 1. The obtained contact angle is 130°, the UV irradiation time is 20min, 5µL of liquid is added dropwise, and the measured directional transport time is approximately 20s.

[0044] Comparative Example 1 The other conditions of this comparative example are the same as those of Example 1, except that only STA is used for double-sided impregnation when constructing the hydrophobic coating. Due to the influence of the fabric pores, when the ultraviolet light is irradiated, the ultraviolet light passes through the pores and affects the other side, causing the hydrophobic coating on the other side to be very unstable, and the hydrophobic angle drops sharply, and even turns into a hydrophilic angle (<90°).

[0045] Comparative Example 2 The other conditions of this comparative example are the same as those of Example 1, except for the mass ratio parameter of the PDMS layer, the mass ratio of PDMS to n-hexane solution is 0.3 g:20 g, and the rest are the same as those of Example 1. This comparative example did not show a transition from a hydrophobic state to a superhydrophilic state under ultraviolet light for 1.5 h, because the concentration of the PDMS solution was too high, and the hydrophobicity of the ZnO / STA side was further reinforced through the pores.

[0046] Comparative Example 3 The other conditions of this comparative example are the same as those of Example 1, except for the mass ratio parameter of the PDMS layer, the mass ratio of PDMS to n-hexane solution is 0.01 g:20 g, and the rest are the same as those of Example 1. After 10 minutes of ultraviolet irradiation, the back hydrophobic angle also decreases significantly, which is because the hydrophobic layer is not stable enough, and the ultraviolet light continues to affect the back side through the pores of the fabric.

Claims

1. An antibacterial functional fabric for directional transport of sweat in response to ultraviolet light, characterized in that: The antibacterial functional fabric consists of a fabric substrate covered with nano ZnO, a STA coating and a PDMS coating sequentially arranged on the inner surface of the fabric substrate, and a STA coating arranged on the outer surface of the fabric substrate.

2. The antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 1, characterized in that: The fabric in the fabric substrate is selected from polyester fiber and cotton fabric.

3. The method for preparing the antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 1 or 2, characterized in that: The fabric substrate is immersed in a dopamine hydrochloride solution for polymerization to obtain a fabric substrate with polydopamine attached, and then the fabric substrate with polydopamine attached is 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 then the fabric substrate covered with nano ZnO is 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.

4. The method for preparing an antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 3, 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.

5. The method for preparing an antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 3, 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.

6. The method for preparing an antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 3, 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, wherein the temperature of the drying treatment is 40-80° C. and the time is 20-40 minutes.

7. The method for preparing an antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 3, characterized in that: 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.

8. The method for preparing an antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 3, characterized in that: The PDMS-containing mixed solution C is composed 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; The coating method is spraying with a spray gun.

9. The method for preparing an antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 3, 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.

10. The use of the antibacterial functional fabric for directional transport of sweat in response to ultraviolet light according to claim 1 or 2, characterized in that: The antibacterial functional fabric is used in clothing that comes into contact with human skin.

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