Moisture-absorbing and sweat-releasing type anti-ultraviolet functional fabric and preparation method thereof

Abstract

The application provides a moisture absorption and sweat releasing type anti-ultraviolet functional fabric and a preparation method thereof, and relates to the technical field of fabrics.The preparation steps comprise the following steps: adding amino carbon black, a dispersing agent and an antioxidant to nylon 66 master batches, extruding after mixing, and obtaining black color master batches; spinning to obtain yarn; weaving to obtain fabric gray cloth; carrying out surface activation treatment, immersing in a Tris-HCl buffer solution containing dopamine hydrochloride, then slowly adding a TNTs dispersion liquid; obtaining a PDA / TNTs biomimetic modification fabric after stirring and reacting at room temperature; then washing the biomimetic modification fabric, immersing in an alkaline buffer solution containing an amino-terminated monomethyl ether polyethylene glycol, and carrying out water washing, drying and setting after reaction, so that the moisture absorption and sweat releasing type anti-ultraviolet functional fabric is obtained.The fabric prepared by the application not only effectively solves the problems of inorganic particle agglomeration and fiber photoaging, but also has excellent and durable anti-ultraviolet protection performance and moisture absorption, sweat releasing and moisture conducting functions.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, specifically to a moisture-wicking, UV-resistant functional fabric and its preparation method. Background Technology

[0002] Moisture-wicking and UV-resistant fabrics are in high demand in outdoor sportswear. Currently, common preparation methods involve melting and incorporating UV-resistant inorganic powders (such as titanium dioxide (TiO2), zinc oxide, and nano-carbon black) into the fibers during the spinning stage, or adhering functional powders to the fabric surface through a finishing resin coating. However, these technologies face the following bottlenecks in actual production and application: First, when inorganic UV-resistant particles are directly added to the matrix resin, the inorganic nanoparticles are prone to agglomeration, easily clogging filters and spinnerets in actual melt spinning production, leading to high breakage rates and low spinning yields. This also causes stress concentration, resulting in a sharp decrease in the breaking strength of the formed fibers. Furthermore, unencapsulated TiO2 particles undergo photocatalysis under UV irradiation, generating highly reactive free radicals that accelerate the degradation of polyamide (such as nylon 66) fiber structures. Secondly, if organic UV inhibitors or free radical quenchers (such as polydopamine) are introduced during the spinning stage, these organic compounds often cannot withstand the high melt spinning temperatures (above 260°C) of nylon 66, resulting in severe thermal degradation and carbonization. Thirdly, while conventional finishing coating methods avoid the high spinning temperatures, the surface of nylon fibers that have not undergone plasma activation modification is chemically inert, making it difficult for functional coatings to form strong chemical bonds. This causes the UV-resistant particles to easily detach during daily washing, resulting in extremely poor wash resistance. Simultaneously, resin coatings fixed with crosslinking agents significantly increase the fabric's bending stiffness, leading to a stiff hand feel and easily clogging the fabric's breathable pores, causing the fabric to lose its necessary breathability and moisture-wicking functions. Based on this, the present invention provides a moisture-wicking, UV-resistant functional fabric and its preparation method. Summary of the Invention

[0003] The purpose of this invention is to provide a moisture-wicking and UV-resistant functional fabric and its preparation method, aiming to solve the technical problems of organic functional materials such as polydopamine being unable to withstand the high temperature of melt spinning, inorganic UV-resistant particles easily accelerating fiber aging, and traditional finishing coatings having a stiff feel and poor washability.

[0004] On one hand, the present invention provides a moisture-wicking and UV-resistant functional fabric, the steps of which include: (1) Add 5-10 parts of ammoniated carbon black to 90-95 parts of nylon 66 masterbatch, and add 0.5-2 parts of dispersant and 0.2-0.8 parts of antioxidant. After mixing, extrude the mixture through a twin-screw extruder to obtain black masterbatch. (2) The black masterbatch is melt-spun, cooled and stretched to make yarn; the yarn is used as the outer yarn and the spandex core yarn to prepare core-spun yarn through machine wrapping process, and then woven to obtain fabric greige. (3) The fabric blank is placed in a low-temperature plasma treatment machine for surface activation treatment, then immersed in a Tris-HCl buffer solution containing dopamine hydrochloride, and then TNTs dispersion is slowly added dropwise; under the condition of air introduction, the reaction is stirred at room temperature to obtain PDA / TNTs biomimetic modified fabric. (4) After washing the biomimetic modified fabric, it is immersed in a weak alkaline buffer solution containing terminal amino monomethyl ether polyethylene glycol and reacted at 50-60℃ for 4-6 hours. Then, it is washed, dried and shaped to obtain a moisture-wicking and UV-resistant functional fabric.

[0005] Further, in step (1), the preparation method of the aminated carbon black includes: dispersing nano carbon black in N,N-dimethylformamide after mixed acid oxidation treatment, adding hexamethylenediamine and condensing agent, reacting under nitrogen protection, centrifuging, washing and drying to obtain aminated carbon black with surface rich in active amino groups.

[0006] Furthermore, the mass-to-volume ratio of the nano-carbon black, N,N-dimethylformamide, and hexamethylenediamine is 10g:200mL:3-5g.

[0007] Further, in step (3), the conditions for the low-temperature plasma treatment are: under an oxygen atmosphere, the treatment power is 150-200W, the gas pressure is 30-50Pa, and the treatment time is 60-120 seconds.

[0008] Further, in step (4), the preparation method of the TNTs dispersion includes: adding anatase titanium dioxide powder to NaOH solution, hydrothermally reacting at 120-130℃ for 20-24h, then washing with 0.1mol / L HCl until neutral, filtering, and calcining at 350-400℃ for 2-4h to obtain TiO2 nanotube TNTs; ultrasonically dispersing them in deionized water to obtain the TNTs dispersion.

[0009] Further, in step (4), the pH value of the Tris-HCl buffer solution is 8.2-8.5; the ratio of the amount of buffer solution, dopamine hydrochloride and TNTs is 1000 mL: (2-4) g: (3-5) g; and the reaction time at room temperature is 12-24 hours.

[0010] Further, in step (4), the molecular weight of the terminal amino monomethyl ether polyethylene glycol is 1000-2000; and the mass concentration in the weakly alkaline buffer solution is 10-15 g / L.

[0011] Further, in step (4), the weakly alkaline buffer solution is a phosphate buffer solution with pH=8.0; the drying and shaping temperature is 100-110℃.

[0012] Further, in step (1), the dispersant is N,N'-ethylene bis-stearamide or polyamide wax, and its addition amount is 0.5-2 parts; the antioxidant is a mixture of hindered phenolic antioxidant 1098 and phosphite antioxidant 168 in a mass ratio of 1:1, and its addition amount is 0.2-0.8 parts.

[0013] On the other hand, the present invention also provides a moisture-wicking and UV-resistant functional fabric, which is prepared using the aforementioned preparation method.

[0014] The beneficial effects of this invention are as follows: 1. This invention involves amination of nano-carbon black to enrich the surface of the carbon black with active amino groups. These amino groups can form excellent interfacial compatibility and micro-crosslinking with the end groups of nylon 66 molecular chains during melt blending, which greatly improves the dispersion state of inorganic carbon black particles in nylon macromolecules. This solves the problem of inorganic powder agglomeration and damage to fiber strength in conventional solution dyeing, and significantly improves the overall mechanical properties of the fabric.

[0015] 2. This invention combines plasma activation with PDA / TNTs biomimetic modification to construct a robust organic / inorganic composite UV-resistant layer on the surface of nylon fibers. This core-shell UV-resistant system places stable UV-absorbing carbon black inside the fiber, while placing photocatalytically active TiO2 nanotubes (TNTs) on the outer surface of the fiber. At the same time, dopamine (PDA) not only acts as a strong adhesive to firmly anchor TNTs to the fabric surface in the form of chemical bonds, solving the problem of poor wash resistance of conventional finishing coatings, but also utilizes its strong free radical quenching ability rich in quinone groups to efficiently capture and isolate free radicals generated by TNTs due to photocatalysis, solving the defect of fiber photoaging caused by single blend spinning, and achieving an extremely high and long-lasting UPF protection value.

[0016] 3. This invention creatively utilizes the activity of the polydopamine-modified layer to further chemically graft terminal amino monomethyl ether polyethylene glycol (mPEG-NH2) through Michael addition or Schiff base reaction. The introduction of flexible hydrophilic long chains of polyethylene glycol not only endows the slightly hydrophobic base fabric with superior instantaneous moisture absorption and strong capillary wicking ability, but also breaks through the micropore blockage and stiff feel caused by traditional resin coating crosslinking, so that the fabric can maintain its softness, lightness and breathability while possessing strong protective functions. Detailed Implementation

[0017] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] It should also be noted that Nylon 66, grade 3010N, was purchased from Mitsubishi Corporation of Japan. Nano carbon black, grade MA-100, purchased from Shanghai Shengqi International Trade Co., Ltd. The spandex core yarn is made of 40D spandex yarn produced by Shaoxing Miaohua Technology Co., Ltd. Example 1

[0019] This embodiment provides a method for preparing a moisture-wicking, UV-resistant functional fabric, which specifically includes the following steps: (1) Preparation of black masterbatch 95 parts of nylon 66 masterbatch were mixed with 5 parts of aminoated carbon black, and 0.8 parts of dispersant N,N'-ethylene bis-stearamide and 0.4 parts of antioxidant (hindered phenolic antioxidant 1098 and phosphite antioxidant 168 were compounded at a mass ratio of 1:1) were added. The above raw materials were mixed in a high-speed mixer at 800 rpm for 15 minutes, and then passed through a twin-screw extruder at 240°C in zone 1, 250°C in zone 2, 255°C in zone 3, 260°C in zone 4, and 265°C at the die head, with a screw speed of 300 rpm. The mixture was melt-blended, extruded, water-cooled, and pelletized to obtain black masterbatch. The preparation method of the aminated carbon black is as follows: 10g of nano-carbon black is added to 200mL of mixed acid (concentrated sulfuric acid:concentrated nitric acid = 3:1, volume ratio), and ultrasonically oxidized at 60℃ for 4 hours. After centrifugation and washing until neutral, carbon black oxide is obtained after drying. The carbon black oxide is dispersed in 200mL of N,N-dimethylformamide, 4g of hexamethylenediamine and 0.5g of condensing agent N,N'-dicyclohexylcarbodiimide (DCC) are added, and the mixture is refluxed at 80℃ for 12 hours under nitrogen protection. After centrifugation, washing with ethanol three times, and vacuum drying at 60℃, aminated carbon black with active amino groups on the surface is obtained. (2) Preparation of yarn and core-spun yarn Black masterbatch was vacuum dried at 120℃ and -0.1MPa for 8 hours, then spun using a melt spinning machine at 275℃, cooling air temperature of 20℃, and air velocity of 0.5m / s. After cooling and drafting to a draft ratio of 4.2, a 70D / 48F black yarn was produced. This yarn was used as the outer covering yarn, with 40D spandex as the core yarn. A core-spun fabric was prepared using an air-spun yarn machine at a twist of 1000T / m and a winding speed of 400m / min. The core-spun yarn was then knitted into a plain weave fabric on a circular knitting machine at a gauge of 28 gauges / inch, with a weight of approximately 180g / m².2 ; (3) PDA / TNTs biomimetic modification The raw fabric was cut into 30cm×30cm pieces and placed in a low-temperature plasma treatment machine for surface activation treatment in an oxygen atmosphere. The power was 180W, the pressure was 40Pa, and the treatment time was 90 seconds. The treated fabric was immediately immersed in a Tris-HCl buffer solution containing dopamine hydrochloride (pH 8.5, volume 1000mL, dopamine hydrochloride 3g), followed by the slow addition of a TNT dispersion (containing 4g TNTs). The reaction was carried out with magnetic stirring for 18 hours at a flow rate of 1L / min and a room temperature of 25℃, allowing dopamine to self-polymerize to form polydopamine and coat the TNTs, thus forming a PDA / TNTs biomimetic modification layer on the fabric surface. The TNTs dispersion was prepared as follows: 5g of anatase titanium dioxide powder was added to 80mL of 10M NaOH solution and stirred for 30 minutes. The mixture was then transferred to a 100mL high-pressure reactor lined with polytetrafluoroethylene (PTFE) and subjected to hydrothermal reaction at 125℃ for 22 hours. After natural cooling, the product was acid-washed with 0.1M HCl to pH=7, washed with deionized water, filtered, and calcined in a muffle furnace at 380℃ for 3 hours with a heating rate controlled at 5℃ / min to obtain TiO2 nanotubes (TNTs, outer diameter 10nm, inner diameter 4nm, length 100-300nm). 4g of TNTs were ultrasonically dispersed in 200mL of deionized water at a power of 200W for 30 minutes to obtain the TNTs dispersion. (4) Hydrophilic modification and shaping The biomimetic modified fabric was washed three times with deionized water and then immersed in a weakly alkaline buffer solution (pH=8.0 phosphate buffer, volume 1L, mPEG-NH2 concentration 12g / L) containing terminal amino monomethyl ether polyethylene glycol (mPEG-NH2, molecular weight 1500). The mixture was reacted at 55℃ for 5 hours with an oscillation frequency of 100rpm. After the reaction, the fabric was washed three times with deionized water and once with ethanol, and finally dried and set in a 105℃ oven for 20 minutes to obtain a moisture-wicking, UV-resistant functional fabric. Example 2

[0020] This embodiment provides a method for preparing a moisture-wicking, UV-resistant functional fabric, which specifically includes the following steps: (1) Preparation of black masterbatch 90 parts of nylon 66 masterbatch were mixed with 10 parts of aminoated carbon black, and 0.5 parts of dispersant N,N'-ethylene bis-stearamide and 0.2 parts of antioxidant (hindered phenolic antioxidant 1098 and phosphite antioxidant 168 were compounded at a mass ratio of 1:1) were added. The above raw materials were mixed in a high-speed mixer at 800 rpm for 15 minutes, and then passed through a twin-screw extruder at 240°C in zone 1, 250°C in zone 2, 255°C in zone 3, 260°C in zone 4, and 265°C at the die head, with a screw speed of 300 rpm. The mixture was melt-blended, extruded, water-cooled, and pelletized to obtain black masterbatch. The preparation method of the aminated carbon black is as follows: 10g of nano-carbon black is added to 200mL of mixed acid (concentrated sulfuric acid:concentrated nitric acid = 3:1, volume ratio), and ultrasonically oxidized at 60℃ for 4 hours. After centrifugation and washing until neutral, carbon black oxide is obtained after drying. The carbon black oxide is dispersed in 200mL of N,N-dimethylformamide, 3g of hexamethylenediamine and 0.5g of condensing agent N,N'-dicyclohexylcarbodiimide (DCC) are added, and the mixture is refluxed at 80℃ for 12 hours under nitrogen protection. After centrifugation, washing with ethanol three times, and vacuum drying at 60℃, aminated carbon black with active amino groups on the surface is obtained. (2) Preparation of yarn and core-spun yarn Black masterbatch was vacuum dried at 120℃ and -0.1MPa for 8 hours, then spun using a melt spinning machine at 275℃, cooling air temperature of 20℃, and air velocity of 0.5m / s. After cooling and drafting to a draft ratio of 4.2, a 70D / 48F black yarn was produced. This yarn was used as the outer covering yarn, with 40D spandex as the core yarn, and core-spun yarn was prepared using an air-wrapping machine at a twist of 1000T / m and a winding speed of 400m / min. The core-spun yarn was then knitted into a plain weave fabric on a circular knitting machine at a gauge of 28 gauges / inch, with a weight of approximately 180g / m². 2 ; (3) PDA / TNTs biomimetic modification The raw fabric was cut into 30cm×30cm pieces and placed in a low-temperature plasma treatment machine for surface activation treatment in an oxygen atmosphere. The power was 150W, the pressure was 30Pa, and the treatment time was 60 seconds. The treated fabric was immediately immersed in a Tris-HCl buffer solution containing dopamine hydrochloride (pH 8.2, volume 1000mL, dopamine hydrochloride 2g), followed by the slow addition of a TNT dispersion (containing 3g TNTs). The reaction was carried out with magnetic stirring for 12 hours at a flow rate of 1L / min and a room temperature of 25℃, allowing dopamine to self-polymerize to form polydopamine and coat the TNTs, thus forming a PDA / TNTs biomimetic modification layer on the fabric surface. The TNTs dispersion was prepared as follows: 5g of anatase titanium dioxide powder was added to 80mL of 10M NaOH solution and stirred for 30 minutes. The mixture was then transferred to a 100mL high-pressure reactor lined with polytetrafluoroethylene (PTFE) and subjected to hydrothermal reaction at 120℃ for 24 hours. After natural cooling, the product was acid-washed with 0.1M HCl to pH=7, washed with deionized water, filtered, and calcined in a muffle furnace at 350℃ for 4 hours with a heating rate controlled at 5℃ / min to obtain TiO2 nanotubes (TNTs, outer diameter 10nm, inner diameter 4nm, length 100-300nm). 3g of TNTs was ultrasonically dispersed in 200mL of deionized water at a power of 200W for 30 minutes to obtain the TNTs dispersion. (4) Hydrophilic modification and shaping The biomimetic modified fabric was washed three times with deionized water and then immersed in a weakly alkaline buffer solution (pH=8.0 phosphate buffer, volume 1L, mPEG-NH2 concentration 10g / L) containing terminal amino monomethyl ether polyethylene glycol (mPEG-NH2, molecular weight 1000). The mixture was reacted at 50℃ for 4 hours with an oscillation frequency of 100rpm. After the reaction, the fabric was washed three times with deionized water and once with ethanol, and finally dried and set in a 100℃ oven for 20 minutes to obtain a moisture-wicking, UV-resistant functional fabric. Example 3

[0021] This embodiment provides a method for preparing a moisture-wicking, UV-resistant functional fabric, which specifically includes the following steps: (1) Preparation of black masterbatch 95 parts of nylon 66 masterbatch were mixed with 5 parts of aminoated carbon black, and 2 parts of dispersant polyamide wax and 0.8 parts of antioxidant (hindered phenolic antioxidant 1098 and phosphite antioxidant 168 were compounded in a 1:1 mass ratio) were added. The above raw materials were mixed in a high-speed mixer at 800 rpm for 15 minutes, and then passed through a twin-screw extruder at 240°C in zone 1, 250°C in zone 2, 255°C in zone 3, 260°C in zone 4, and 265°C at the die head, with a screw speed of 300 rpm. The mixture was melt-blended, extruded, water-cooled, and pelletized to obtain black masterbatch. The preparation method of the aminated carbon black is as follows: 10g of nano-carbon black is added to 200mL of mixed acid (concentrated sulfuric acid:concentrated nitric acid = 3:1, volume ratio), and ultrasonically oxidized at 60℃ for 4 hours. After centrifugation and washing until neutral, carbon black oxide is obtained after drying. The carbon black oxide is dispersed in 200mL of N,N-dimethylformamide, 5g of hexamethylenediamine and 0.5g of condensing agent N,N'-dicyclohexylcarbodiimide (DCC) are added, and the mixture is refluxed at 80℃ for 12 hours under nitrogen protection. After centrifugation, washing with ethanol three times, and vacuum drying at 60℃, aminated carbon black with active amino groups on the surface is obtained. (2) Preparation of yarn and core-spun yarn Black masterbatch was vacuum dried at 120℃ and -0.1MPa for 8 hours, then spun using a melt spinning machine at 275℃, cooling air temperature of 20℃, and air velocity of 0.5m / s. After cooling and drafting to a draft ratio of 4.2, a 70D / 48F black yarn was produced. This yarn was used as the outer covering yarn, with 40D spandex as the core yarn, and core-spun yarn was prepared using an air-wrapping machine at a twist of 1000T / m and a winding speed of 400m / min. The core-spun yarn was then knitted into a plain weave fabric on a circular knitting machine at a gauge of 28 gauges / inch, with a weight of approximately 180g / m². 2 ; (3) PDA / TNTs biomimetic modification The raw fabric was cut into 30cm×30cm pieces and placed in a low-temperature plasma treatment machine for surface activation treatment in an oxygen atmosphere at a power of 200W, a pressure of 50Pa, and a treatment time of 120 seconds. The treated fabric was immediately immersed in a Tris-HCl buffer solution containing dopamine hydrochloride (pH 8.5, volume 1000mL, 4g dopamine hydrochloride), followed by the slow addition of a TNT dispersion (containing 5g TNTs). The reaction was carried out under magnetic stirring for 24 hours at a flow rate of 1L / min and a room temperature of 25℃, allowing dopamine to self-polymerize to form polydopamine and coat the TNTs, thus forming a PDA / TNTs biomimetic modification layer on the fabric surface. The TNTs dispersion was prepared as follows: 5g of anatase titanium dioxide powder was added to 80mL of 10M NaOH solution and stirred for 30 minutes. The mixture was then transferred to a 100mL high-pressure reactor lined with polytetrafluoroethylene (PTFE) and subjected to hydrothermal reaction at 130℃ for 20 hours. After natural cooling, the product was acid-washed with 0.1M HCl to pH=7, washed with deionized water, filtered, and calcined in a muffle furnace at 400℃ for 2 hours, with a heating rate controlled at 5℃ / min, to obtain TiO2 nanotubes (TNTs, outer diameter 10nm, inner diameter 4nm, length 100-300nm). 5g of TNTs were ultrasonically dispersed in 200mL of deionized water at 200W for 30 minutes to obtain the TNTs dispersion. (4) Hydrophilic modification and shaping The biomimetic modified fabric was washed three times with deionized water and then immersed in a weakly alkaline buffer solution (pH=8.0 phosphate buffer, volume 1L, mPEG-NH2 concentration 15g / L) containing amino-terminated monomethyl ether polyethylene glycol (mPEG-NH2, molecular weight 2000). The mixture was reacted at 60℃ for 6 hours with an oscillation frequency of 100rpm. After the reaction, the fabric was washed three times with deionized water and once with ethanol, and finally dried and set in a 110℃ oven for 20 minutes to obtain a moisture-wicking, UV-resistant functional fabric.

[0022] Comparative Example 1 The only difference from Example 1 is step (1): "5 parts of aminated carbon black" is replaced with "5 parts of untreated raw nano carbon black", while the other components and preparation conditions are exactly the same.

[0023] The original nano-carbon black is used directly without undergoing mixed acid oxidation and hexamethylenediamine grafting reaction. The remaining steps (2), (3), and (4) are the same as in Example 1.

[0024] Comparative Example 2 The only difference from Example 1 is step (3): After the fabric is cut, it is not subjected to surface activation treatment by a low-temperature plasma treatment machine, but is directly immersed in a Tris-HCl buffer solution containing dopamine hydrochloride. The other conditions are exactly the same as in Example 1. The remaining steps (1), (2), and (4) are the same as in Example 1.

[0025] Comparative Example 3 The only difference from Example 1 is step (3): after immersion in a Tris-HCl buffer solution containing dopamine hydrochloride, no TNT dispersion is added; the polydopamine layer is formed solely by the self-polymerization of dopamine. The remaining conditions are exactly the same as in Example 1. The remaining steps (1), (2), and (4) are the same as in Example 1.

[0026] Comparative Example 4 The only difference from Example 1 is step (4): After washing, the biomimetic modified fabric is not immersed in a weakly alkaline buffer solution containing terminal amino monomethyl ether polyethylene glycol, but is directly washed with water and then dried and shaped in an oven at 105°C for 20 minutes, i.e., the hydrophilic modification step of mPEG-NH2 is not performed. The remaining steps (1), (2), and (3) are the same as in Example 1.

[0027] Comparative Example 5 The only difference from Example 1 is the change in the order of steps: steps (3) and (4) are swapped, as follows: First, the plasma-activated fabric is directly immersed in a weakly alkaline buffer solution containing mPEG-NH2 (pH 8.0, 12 g / L, 55°C for 5 hours), allowing mPEG-NH2 to adhere to the fabric surface through physical adsorption or weak interaction; then, the fabric is immersed in a Tris-HCl buffer solution containing dopamine hydrochloride, TNTs dispersion is added dropwise, and the mixture is stirred at room temperature for 18 hours with air to perform PDA / TNTs biomimetic modification; finally, the fabric is washed, dried, and shaped. The remaining conditions and steps are exactly the same as in Example 1.

[0028] Experimental Example 1: The performance of the fabrics prepared in Examples 1-3 and Comparative Examples 1-5 was tested, and the results are shown in Table 1: 1. Breaking strength (warp / weft): The test was conducted according to GB / T 3923.1-2013 "Textiles - Tensile properties of fabrics - Part 1: Determination of breaking strength and elongation at break (strip method)". Five strips were cut from the warp and weft directions of each fabric. The sample size was 50 mm wide and 200 mm long. The strips were equilibrated for 24 hours at a temperature of (20±2)℃ and a relative humidity of (65±4)%. The tensile speed was 100 mm / min. The two ends of the sample were clamped flat in the upper and lower clamps to ensure that the sample was not skewed. The instrument was started and the sample was stretched until it broke. The breaking strength (N) and elongation at break (%) were recorded. The arithmetic mean of the five tests in the warp and weft directions was calculated.

[0029] 2. UV Protection Performance: Referring to GB / T 18830-2009 "Evaluation of UV Protection Performance of Textiles", four representative samples, each no smaller than 50mm × 50mm, were cut from each fabric sample, avoiding obvious defects and fabric edges. The samples were clamped in the sample holder of the UV spectrophotometer, ensuring the fabric was flat and wrinkle-free. The test wavelength range was set to 290nm–400nm. Transmittance was measured at at least five different locations on each sample, and the transmittance at each wavelength was recorded. The UPF value was calculated according to the standard formula, and the arithmetic mean of the four samples was taken as the final result, rounded to the nearest integer. 3. Washing resistance: The product was subjected to 50 consecutive standard washes according to GB / T 8629-2017 "Test Procedures for Household Washing and Drying of Textiles". The UPF value was then determined after the washes. 4. Moisture wicking performance: Tested according to GB / T 21655.1-2023 "Evaluation of moisture wicking and quick-drying properties of textiles - Part 1: Single-item combination test method". The main test indicators include: Water droplet diffusion time (s): Record the time required for a water droplet to spread completely on the fabric surface. The shorter the time, the better the moisture absorption. Data were tested before washing and after 50 standard washes.

[0030] Cubic height (cm): The height of the warp capillary effect of the test fabric within 30 minutes. The higher the height, the stronger the sweat-wicking and moisture-wicking ability.

[0031] The test results are shown in Table 1 below: Table 1 Example 1 315 258 135 128 3.2 4.5 14.8 Example 2 302 245 122 115 3.8 5 14.2 Example 3 321 265 148 141 2.8 4 15.2 Comparative Example 1 212 185 105 98 3.3 4.6 14.5 Comparative Example 2 310 255 131 45 3.2 15 14.6 Comparative Example 3 318 260 88 82 3 4.2 14.9 Comparative Example 4 316 262 136 129 10.5 12.5 9.5 Comparative Example 5 312 256 132 120 19.5 23.5 7.5 As can be seen from the foregoing, the tensile strength of Example 1 is significantly higher than that of Comparative Example 1. This is because Comparative Example 1 uses untreated raw nano-carbon black, which is prone to agglomeration in nylon 66 melt, leading to stress concentration points during spinning, increasing the breakage rate, and thus significantly reducing the overall tensile strength of the fabric. In contrast, this invention uses aminated carbon black, whose surface active amino groups can form good compatibility and micro-crosslinks with the end groups of nylon 66 macromolecules, which not only greatly improves the dispersibility of inorganic powders but also avoids the decrease in fiber strength.

[0032] Comparative Example 2 omitted the low-temperature plasma activation step. Although its initial UPF value and water droplet diffusion time were acceptable, after 50 standard washes, the UPF value plummeted to 45, and the water droplet diffusion time increased to 15.0 seconds. This demonstrates that the surface of the fabric without plasma activation is chemically inert, and polydopamine (PDA) and subsequent grafts can only adhere through physical adsorption, resulting in extremely poor wash resistance. This invention introduces oxygen- and nitrogen-containing polar groups through plasma activation, promoting the formation of strong covalent and hydrogen bonds between the PDA layer and the fabric, thus endowing the fabric with excellent and durable wash resistance.

[0033] Comparative Example 3, without the addition of TNT dispersion, achieved a relatively high UPF value of 88 thanks to its internal 5% carbon black concentration, but this was still far lower than the 135 of Example 1. This indicates that while internal carbon black alone provides basic protection, achieving high-intensity outdoor extreme UV protection requires the synergistic UV-resistant system described in Example 1. Simultaneously, the PDA layer of this invention effectively quenches the free radicals generated by TNTs, achieving an extremely high UPF value while preventing fiber aging.

[0034] Comparative Example 4, without mPEG-NH2 hydrophilic modification, possessed some water absorption capacity due to the inherent hydrophilicity of PDA and TNTs (drip diffusion time 10.5 seconds), but it still lagged significantly behind the instantaneous absorption and high wicking capacity of the examples. Comparative Example 5, with a reversed reaction order, failed to effectively fix mPEG due to the lack of PDA as a grafting bridge, resulting in poor hydrophilicity (drip diffusion time 19.5 seconds).

[0035] In contrast, Examples 1-3 of this invention first form an active intermediate layer containing abundant quinone / phenolic hydroxyl groups by in-situ coating TNTs with dopamine, and then chemically graft the terminal amino groups of mPEG-NH2 onto the outermost layer using Michael addition or Schiff base reaction, thereby giving the fabric good instant water absorption (drip diffusion time of 2.8~3.8 seconds before washing) and excellent capillary wicking ability (wicking height of 14.2~15.2cm).

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention; those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention; and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A method for preparing a moisture-wicking, UV-resistant functional fabric, characterized in that the steps include... include: (1) Add 5-10 parts of ammoniated carbon black to 90-95 parts of nylon 66 masterbatch, and add 0.5-2 parts of dispersant and 0.2-0.8 parts of antioxidant. After mixing, extrude the mixture through a twin-screw extruder to obtain black masterbatch. (2) The black masterbatch is melt-spun, cooled and stretched to make yarn; the yarn is used as the outer yarn and the spandex core yarn to prepare core-spun yarn through machine wrapping process, and then woven to obtain fabric greige. (3) The fabric blank is placed in a low-temperature plasma treatment machine for surface activation treatment, then immersed in a Tris-HCl buffer solution containing dopamine hydrochloride, and then TNTs dispersion is slowly added dropwise; under the condition of air introduction, the reaction is stirred at room temperature to obtain PDA / TNTs biomimetic modified fabric. (4) After washing the biomimetic modified fabric, it is immersed in a weak alkaline buffer solution containing terminal amino monomethyl ether polyethylene glycol and reacted at 50-60℃ for 4-6 hours. Then, it is washed, dried and shaped to obtain a moisture-wicking and UV-resistant functional fabric.

2. The method for preparing a moisture-wicking, UV-resistant functional fabric according to claim 1, characterized in that, In step (1), the preparation method of the aminated carbon black includes: after the nano carbon black is oxidized by mixed acid, it is dispersed in N,N-dimethylformamide, hexamethylenediamine and condensing agent are added, the reaction is carried out under nitrogen protection, and the carbon black with surface rich in active amino groups is obtained by centrifugation, washing and drying.

3. The method for preparing a moisture-wicking, UV-resistant functional fabric according to claim 2, characterized in that, The mass-to-volume ratio of the nano-carbon black, N,N-dimethylformamide, and hexamethylenediamine is 10g:200mL:3-5g.

4. The method for preparing a moisture-wicking, UV-resistant functional fabric according to claim 1, characterized in that, In step (3), the conditions for the low-temperature plasma treatment are: under an oxygen atmosphere, the treatment power is 150-200W, the gas pressure is 30-50Pa, and the treatment time is 60-120 seconds.

5. The method for preparing a moisture-wicking, UV-resistant functional fabric according to claim 1, characterized in that, In step (4), the preparation method of the TNTs dispersion includes: adding anatase titanium dioxide powder to NaOH solution, hydrothermally reacting at 120-130℃ for 20-24h, then washing with 0.1mol / L HCl until neutral, filtering, and calcining at 350-400℃ for 2-4h to obtain TiO2 nanotube TNTs; ultrasonically dispersing them in deionized water to obtain the TNTs dispersion.

6. The method for preparing a moisture-wicking, UV-resistant functional fabric according to claim 1, characterized in that, In step (4), the pH value of the Tris-HCl buffer solution is 8.2-8.5; the ratio of the amount of buffer solution, dopamine hydrochloride and TNTs is 1000 mL: (2-4) g: (3-5) g; and the reaction time at room temperature is 12-24 hours.

7. The method for preparing a moisture-wicking, UV-resistant functional fabric according to claim 1, characterized in that, In step (4), the molecular weight of the terminal amino monomethyl ether polyethylene glycol is 1000-2000; and the mass concentration in the weakly alkaline buffer solution is 10-15 g / L.

8. The method for preparing a moisture-wicking, UV-resistant functional fabric according to claim 1, characterized in that, In step (4), the weakly alkaline buffer solution is a phosphate buffer solution with pH=8.0; the drying and shaping temperature is 100-110℃.

9. The method for preparing a moisture-wicking, UV-resistant functional fabric according to claim 1, characterized in that, In step (1), the dispersant is N,N'-ethylene bis-stearamide or polyamide wax, and its addition amount is 0.5-2 parts; the antioxidant is a mixture of hindered phenolic antioxidant 1098 and phosphite antioxidant 168 in a mass ratio of 1:1, and its addition amount is 0.2-0.8 parts.

10. A moisture-wicking, UV-resistant functional fabric, characterized in that, It is prepared using the preparation method according to any one of claims 1-9.