A composite fabric t-shirt with antibacterial and moisture absorption and perspiration functions and a preparation method thereof

Abstract

The application discloses a kind of composite fabric T-shirt with antibacterial and moisture absorption and perspiration function and preparation method thereof, and relates to the technical field of fabric production.The application includes the preparation of temperature-sensitive antibacterial microcapsule, the preparation of functionalized skin slice, the preparation of conductive core layer slice, skin-core composite spinning, weaving and post-processing.The application is provided with temperature-sensitive sophoridine microcapsule through skin-core composite spinning structure, in the use process, the characteristics of volume phase transition of temperature-sensitive polymer at 32-34 ℃ are utilized, so that the microcapsule locks antibacterial component in normal state to reduce loss, and sophoridine is released quickly to kill bacteria when body temperature rises or sweats.The composite fabric can quickly guide sweat from the skin surface to the outside of the fabric and evaporate, avoid the feeling of wet, hot and sticky, and the core layer carbon nanotube conductive network can also timely guide away static charge generated by friction, reduce dust adsorption and keep the fabric clean and breathable.

Description

Technical Field

[0001] This invention relates to the field of fabric production technology, specifically to a composite fabric T-shirt with both antibacterial and moisture-wicking functions and its preparation method. Background Technology

[0002] As people's requirements for clothing comfort, health and functionality continue to improve, composite fabrics with both antibacterial and moisture-wicking properties are increasingly used in sportswear, outdoor clothing and everyday casual wear. Among various functional textiles, composite fabrics with both antibacterial and moisture-wicking properties have seen explosive growth in demand in recent years due to their ability to significantly improve wearing comfort and health protection in fields such as sportswear, outdoor adventure equipment, medical protective textiles and high-end business casual wear.

[0003] While traditional polyester fibers offer advantages such as high strength, good shape retention, and ease of care, their dense molecular structure and low polarity result in low natural moisture regain and poor hydrophilicity. This makes it difficult for sweat to evaporate quickly during wear, leading to a stuffy and sticky feeling. Furthermore, synthetic fiber fabrics are prone to bacterial growth in humid and hot environments, causing odors and skin health problems. Therefore, we propose a more convenient and practical composite fabric T-shirt that combines antibacterial and moisture-wicking functions to meet these needs. Summary of the Invention

[0004] The purpose of this invention is to provide a composite fabric T-shirt with both antibacterial and moisture-wicking functions, and a method for preparing the same, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing the same, comprising the following preparation steps: S1. Preparation of thermosensitive antibacterial microcapsules: N-isopropylacrylamide, N,N'-methylenebisacrylamide, and matrine were added to deionized water at a mass ratio of 1:(0.08-0.12):(0.3-0.5) to prepare an aqueous solution. An emulsifier was added under a nitrogen atmosphere, and after emulsification, the temperature was lowered. An initiator was added to react, and the solution was dialyzed and freeze-dried to obtain thermosensitive matrine microcapsules with a volume phase transition temperature of 32-34℃. S2. Preparation of functionalized skin slices: Polyethylene terephthalate slices, polyethylene glycol 600, flame retardant, nano titanium dioxide, and thermosensitive matrine microcapsules are mixed in a high-speed mixer for 5-8 minutes at a mass ratio of 1:(0.12-0.18):(0.08-0.12):(0.02-0.05):(0.06-0.10). The mixture is then melt-blended, extruded, and water-cooled into pellets by a twin-screw extruder at 250-265℃ to obtain functionalized skin slices. S3. Preparation of conductive core layer slices: Polyethylene terephthalate slices, carbon nanotubes, nano zinc oxide, and dispersant polyvinyl butyral are mixed in a high-speed mixer at a mass ratio of 1:(0.06-0.10):(0.02-0.04):(0.02-0.03). The mixture is then melt-blended, extruded, and water-cooled into pellets using a twin-screw extruder to obtain conductive core layer slices. S4. Sheath-core composite spinning: Functionalized sheath slices and conductive core slices are dried separately and used as raw materials for sheath and core. They are then spun through a sheath-core composite spinneret to obtain modified polyester fibers. S5. Weaving and finishing: Modified polyester fibers are spun and woven into knitted fabrics, which are then treated with hot water and dried to produce composite fabrics with flame retardant, UV protection, antistatic, antibacterial and moisture-wicking functions.

[0006] Furthermore, the emulsifier is sodium dodecyl sulfate, and the amount used is 0.5-0.8% by mass of the aqueous solution; the initiator is potassium persulfate, and the amount used is 1.5-2.0% by mass of the aqueous solution.

[0007] Furthermore, the emulsification conditions are as follows: emulsification at 60-70℃ and 400-600r / min for 30-40 minutes, followed by cooling to 0-5℃; the initiator reaction conditions are as follows: continued stirring reaction at 0-5℃ for 5-6 hours; and the dialysis is performed using a dialysis bag with a molecular weight cutoff of 14000, with dialysis in deionized water for 40-50 hours.

[0008] Furthermore, the drying conditions for the functionalized skin layer slices and the conductive core layer slices are as follows: the functionalized skin layer slices are dried at 260-270℃ for 4-6 hours, and the conductive core layer slices are dried at 275-285℃ for 5-7 hours.

[0009] Furthermore, the mass ratio of the skin layer to the core layer in the skin-core composite spinneret is 35:65 to 45:55; the spinneret orifice is one of a cross-shaped, Y-shaped, or trilobal irregular cross section, and the length-to-diameter ratio of the spinneret orifice is 2.5:1-3.5:1; the spinning temperature is 275-285℃, and the winding speed is 2000-3200m / min.

[0010] Furthermore, after the nascent fibers exit the spinneret, they are asymmetrically cooled using a side-blowing method, with an air temperature of 15-20℃, an air velocity of 0.3-0.6m / s, and a relative humidity of 65-75%. Subsequently, they undergo two-stage hot stretching, with the first stage temperature at 80-90℃ and the second stage temperature at 120-140℃, resulting in a total stretching ratio of 3.0-4.5 times. After stretching, they are heat-set at a temperature of 140-160℃ for 3-5 minutes.

[0011] Furthermore, the spinning process involves spinning modified polyester fibers into 32S-40S single yarns through processes such as opening, carding, drawing, roving, and spinning. The weaving process utilizes a weft knitting circular knitting machine to produce a knitted fabric with a weight of 160-200 g / m². The hot water treatment temperature is 85-90℃ for 10-15 minutes, and the drying temperature is 60-70℃.

[0012] Furthermore, a composite fabric T-shirt with both antibacterial and moisture-wicking functions is obtained by using any one of the methods described above for preparing a composite fabric with both antibacterial and moisture-wicking functions.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This composite fabric T-shirt, which combines antibacterial and moisture-wicking functions, and its preparation method utilize a core-skin composite spinning structure combined with thermosensitive matrine microcapsules. During use, the thermosensitive polymer undergoes a volume phase transition at 32-34℃, allowing the microcapsules to lock in antibacterial components under normal conditions to reduce loss. When body temperature rises or sweating occurs, matrine is rapidly released to kill bacteria. Simultaneously, hydrophilic modification of the skin layer and a cross-shaped or Y-shaped spinneret design create highly efficient moisture-wicking grooves on the fiber surface, significantly shortening the sweat diffusion path. This composite fabric can quickly guide sweat from the skin surface to the outside of the fabric for evaporation, avoiding a damp and sticky feeling. The conductive network of carbon nanotubes in the core layer can also promptly dissipate static charges generated by friction, reducing dust adsorption and keeping the fabric clean and breathable.

[0014] At the same time, it avoids the defects of traditional finished fabrics, such as stiffness and poor washability, and also has long-lasting and safe antibacterial protection capabilities, meeting the dual needs of high-performance sports and outdoor clothing for comfort and health. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0016] Example 1

[0017] A composite fabric T-shirt with both antibacterial and moisture-wicking functions, and its preparation method, comprising the following steps:

[0018] S1. Preparation of thermosensitive antibacterial microcapsules: N-isopropylacrylamide, N,N'-methylenebisacrylamide, and matrine were added to deionized water at a mass ratio of 1:0.1:0.4 to prepare an aqueous solution with a monomer concentration of 10 wt%. 0.65 wt% sodium dodecyl sulfate was added under a nitrogen atmosphere, and emulsification was carried out at 65℃ and 500 r / min for 35 min. The temperature was then lowered to 3℃, and 1.75 wt% potassium persulfate was added. The reaction was continued at 3℃ with stirring for 5.5 h. After the reaction, the mixture was dialyzed in deionized water for 45 h using a dialysis bag with a molecular weight cutoff of 14000. Finally, it was freeze-dried to obtain thermosensitive matrine microcapsules with a volume phase transition temperature of 32-34℃.

[0019] S2. Preparation of functionalized skin slices: PET slices, polyethylene glycol 600, flame retardant, nano titanium dioxide, and the thermosensitive matrine microcapsules prepared above are mixed in a high-speed mixer at a mass ratio of 1:0.15:0.10:0.035:0.08 for 6.5 min. The mixture is then melt-blended, extruded, and water-cooled into pellets by a twin-screw extruder at 258°C to obtain functionalized skin slices.

[0020] S3. Preparation of conductive core layer slices: PET slices, carbon nanotubes, nano zinc oxide, and polyvinyl butyral are mixed in a high-speed mixer at a mass ratio of 1:0.08:0.03:0.025, and then melt-blended, extruded, and water-cooled into pellets to obtain conductive core layer slices.

[0021] S4, core-sheath composite spinning: functionalized sheath chips were dried at 265℃ for 5 hours, and conductive core chips were dried at 280℃ for 6 hours. A core-sheath composite spinneret was used, with a sheath-to-core mass ratio of 40:60. The spinneret orifice had a Y-shaped cross-section (length-to-diameter ratio 3.0:1). The spinning temperature was 280℃, and the winding speed was 2600 m / min. After the nascent fibers exited the spinneret, they were asymmetrically cooled by side-blowing air (air temperature 18℃, air velocity 0.45 m / s, relative humidity 70%). Subsequently, two-stage hot stretching was performed: the first stage at 85℃ and the second stage at 130℃, with a total stretching ratio of 3.8 times. The heat setting temperature was 150℃ for 4 minutes.

[0022] S5. Weaving and Finishing: Modified polyester fibers are spun into 36S single yarn through processes such as opening, carding, drawing, roving, and spinning. This yarn is then woven into a knitted fabric with a weight of 180g / m² using a weft knitting circular knitting machine. The fabric is then treated with hot water at 88℃ for 12 minutes and subsequently dried at 65℃ to obtain a composite fabric with flame-retardant, UV-protective, antistatic, antibacterial, and moisture-wicking properties.

[0023] Example 2

[0024] A composite fabric T-shirt with both antibacterial and moisture-wicking functions, and its preparation method, comprising the following steps:

[0025] S1. Preparation of thermosensitive antibacterial microcapsules: N-isopropylacrylamide, N,N'-methylenebisacrylamide, and matrine were added to deionized water at a mass ratio of 1:0.08:0.3 to prepare an aqueous solution with a monomer concentration of 8 wt%. 0.5 wt% sodium dodecyl sulfate was added under a nitrogen atmosphere, and emulsification was carried out at 60℃ and 400 r / min for 30 min, followed by cooling to 0℃. 1.5 wt% potassium persulfate was added, and the reaction was carried out at 0℃ for 5 h. Dialysis was performed using a dialysis bag with a molecular weight cutoff of 14000 for 40 h, followed by freeze-drying to obtain thermosensitive matrine microcapsules with a phase transition temperature of 32-34℃.

[0026] S2. Preparation of functionalized skin slices: PET slices, polyethylene glycol 600, flame retardant, nano titanium dioxide, and the above microcapsules are mixed at high speed for 5 minutes in a mass ratio of 1:0.12:0.08:0.02:0.06. The mixture is then melt-blended, extruded, and water-cooled into pellets using a twin-screw extruder at 250°C.

[0027] S3. Preparation of conductive core layer slices: PET slices, carbon nanotubes, nano zinc oxide, and polyvinyl butyral are mixed at high speed in a mass ratio of 1:0.06:0.02:0.02, then melt-blended, extruded, and water-cooled into pellets using a twin-screw extruder.

[0028] S4, core-sheath composite spinning: sheath chips dried at 260℃ for 4 hours, core chips dried at 275℃ for 5 hours. Sheath-to-core mass ratio 35:65, spinneret orifice cross-section (length-to-diameter ratio 2.5:1). Spinning temperature 275℃, winding speed 2000 m / min. Asymmetrical side-blowing cooling (air temperature 15℃, air velocity 0.3 m / s, RH 65%). Two-stage heat stretching: 80℃ + 120℃, total stretch 3.0 times; heat setting at 140℃ for 5 minutes.

[0029] S5, weaving and finishing: spun into 32S single yarn, woven into 160g / m² knitted fabric on a weft-knitting circular knitting machine. Treated with 85℃ hot water for 15 minutes, then dried at 60℃.

[0030] Example 3

[0031] A composite fabric T-shirt with both antibacterial and moisture-wicking functions, and its preparation method, comprising the following steps:

[0032] S1. Preparation of thermosensitive antibacterial microcapsules: N-isopropylacrylamide, N,N'-methylenebisacrylamide, and matrine were added to deionized water at a mass ratio of 1:0.10:0.4 to prepare an aqueous solution with a monomer concentration of 10 wt%. 0.65 wt% sodium dodecyl sulfate was added under a nitrogen atmosphere, and emulsification was carried out at 65℃ and 500 r / min for 35 min, followed by cooling to 3℃. 1.75 wt% potassium persulfate was added, and the reaction was carried out at 3℃ for 5.5 h. After dialyzing for 45 h, the mixture was freeze-dried to obtain thermosensitive matrine microcapsules with a phase transition temperature of 32-34℃.

[0033] S2. Preparation of functionalized skin slices: PET slices, polyethylene glycol 600, flame retardant, nano titanium dioxide, and the above microcapsules are mixed at high speed for 6.5 min in a mass ratio of 1:0.15:0.10:0.035:0.08, then melt-blended, extruded, and water-cooled pelletized using a twin-screw extruder at 258°C.

[0034] S3. Preparation of conductive core layer slices: PET slices, carbon nanotubes, nano zinc oxide, and polyvinyl butyral are mixed at high speed in a mass ratio of 1:0.08:0.03:0.025, and then melt-blended, extruded, and water-cooled into pellets using a twin-screw extruder.

[0035] S4, core-sheath composite spinning: sheath chips dried at 265℃ for 5 hours, core chips dried at 280℃ for 6 hours. Sheath-to-core mass ratio 40:60, spinneret orifice with Y-shaped cross-section (length-to-diameter ratio 3.0:1). Spinning temperature 280℃, winding speed 2600 m / min. Asymmetrical side-blowing cooling (air temperature 18℃, air velocity 0.45 m / s, RH 70%). Two-stage hot stretching: 85℃ + 130℃, total stretch 3.8 times; heat setting at 150℃ for 4 minutes.

[0036] S5, weaving and finishing: spun into 36S single yarn, woven into 180g / m² knitted fabric on a weft-knitting circular knitting machine. Treated with hot water at 88℃ for 12 minutes, then dried at 65℃.

[0037] Example 4

[0038] A composite fabric T-shirt with both antibacterial and moisture-wicking functions, and its preparation method, comprising the following steps:

[0039] S1. Preparation of thermosensitive antibacterial microcapsules: N-isopropylacrylamide, N,N'-methylenebisacrylamide, and matrine were added to deionized water at a mass ratio of 1:0.12:0.5 to prepare an aqueous solution with a monomer concentration of 12wt%. 0.8wt% sodium dodecyl sulfate was added under a nitrogen atmosphere, and emulsification was carried out at 70℃ and 600 r / min for 40 min, followed by cooling to 5℃. 2.0wt% potassium persulfate was added, and the reaction was carried out at 5℃ for 6 h. After dialyzing for 50 h, the mixture was freeze-dried to obtain thermosensitive matrine microcapsules with a phase transition temperature of 32-34℃.

[0040] S2. Preparation of functionalized skin slices: PET slices, polyethylene glycol 600, flame retardant, nano titanium dioxide, and the above microcapsules are mixed at high speed for 8 minutes in a mass ratio of 1:0.18:0.12:0.05:0.10. The mixture is then melt-blended, extruded, and water-cooled into pellets by a twin-screw extruder at 265°C.

[0041] S3. Preparation of conductive core layer slices: PET slices, carbon nanotubes, nano zinc oxide, and polyvinyl butyral are mixed at high speed in a mass ratio of 1:0.10:0.04:0.03, and then melt-blended, extruded, and water-cooled into pellets using a twin-screw extruder.

[0042] S4, core-sheath composite spinning: sheath chips dried at 270℃ for 6 hours, core chips dried at 285℃ for 7 hours. Sheath-to-core mass ratio 45:55, spinneret with a trilobal cross-section (length-to-diameter ratio 3.5:1), spinning temperature 285℃, winding speed 3200 m / min. Asymmetrical side-blowing cooling (air temperature 20℃, air velocity 0.6 m / s, RH 75%). Two-stage heat stretching: 90℃ + 140℃, total stretch 4.5 times; heat setting at 160℃ for 3 minutes.

[0043] S5, weaving and finishing: spun into 40S single yarn, woven into 200g / m² knitted fabric on a weft-knitting circular knitting machine. Treated with 90℃ hot water for 10 minutes, then dried at 70℃.

[0044] Comparative Example

[0045] Comparative Example 1 (Thermosensitive Antibacterial Microcapsules) Preparation method: Basically the same as in Example 3, except that thermosensitive matrine microcapsules are not added to the functionalized skin slices. The raw material ratio for the skin is: polyethylene terephthalate slices: polyethylene glycol 600: flame retardant: nano titanium dioxide = 1:0.15:0.10:0.035. The remaining steps (the microcapsule preparation step is skipped; conductive core layer slicing, skin-core composite spinning, weaving, and post-treatment) are consistent with Example 3.

[0046] Application: To verify the key role of thermosensitive matrine microcapsules in antibacterial properties and intelligent release effects.

[0047] Comparative Example 2 (Ordinary circular cross-section fiber, non-irregular cross-section) Preparation method: It is basically the same as in Example 3, except that in the core-sheath composite spinning, the spinneret is replaced with a regular circular cross-section (length-to-diameter ratio 1:1) instead of a Y-shaped irregular cross-section. All other parameters (core-sheath mass ratio 40:60, spinning temperature 280℃, winding speed 2600m / min, cooling and stretching conditions, etc.) remain unchanged.

[0048] Application: To verify the effect of irregular cross-section structures on improving moisture absorption and wicking (wicking height, moisture evaporation rate).

[0049] Comparative Example 3 (conventional blended antibacterial fibers, non-core-sheath structure and no temperature-sensitive release) Preparation method: Instead of using core-sheath composite spinning, the functionalized sheath slices (containing temperature-sensitive microcapsules) and conductive core slices from Example 3 were premixed in a high-speed mixer at a mass ratio of 40:60, and then melt-spun using a single screw (ordinary circular spinneret, aspect ratio 1:1). The remaining spinning, stretching, weaving, and post-treatment conditions were the same as in Example 3. This comparative example is equivalent to uniformly distributing the antibacterial and conductive components throughout the entire fiber cross-section, without separate sheath / core functional zones.

[0050] Application: To verify the contribution of the core-shell structure and functional zoning design to the antibacterial durability, antistatic properties and synergistic effect of moisture absorption and perspiration wicking.

[0051] Comparative Example 4 (without asymmetric cooling, using symmetrical uniform cooling) Preparation method: It is basically the same as in Example 3, except that in the core-sheath composite spinning, the cooling method after the nascent fiber exits the spinneret is changed from asymmetrical side-blowing cooling to symmetrical ring-blowing cooling. The cooling conditions are: air temperature 18℃, air speed 0.45m / s, relative humidity 70%, and other parameters (spinneret Y-shaped cross section, core-sheath mass ratio 40:60, spinning temperature 280℃, winding speed 2600m / min, two-stage hot stretching and heat setting, etc.) remain unchanged.

[0052] Application: Used to verify the promoting effect of asymmetric cooling process on fiber cross-sectional irregularity and surface microgroove formation, thereby illustrating its effect on wicking and moisture-wicking properties.

[0053] Antibacterial rate test: According to the test method GB / T20944.3, the inhibition rate was calculated by comparing the number of Escherichia coli colonies cultured on agar medium for 16 hours. The sample and control sample were added to the inoculation solution containing Staphylococcus aureus (ATCC6538) and shaken at 24℃±1℃ for 18 hours. The number of colonies before and after shaking was measured and the inhibition rate was calculated. The test was repeated 3 times and the average value was taken. An inhibition rate of ≥90% was judged to have antibacterial effect. The antibacterial performance of the examples and comparative examples was analyzed.

[0054] For the wicking height test, according to the test method: FZ / T01071-2008 (Test Method for Capillary Effect of Textiles), the sample (300mm × 25mm in the warp direction) is vertically immersed in distilled water, with the lower end submerged by 20mm. The height (mm) of water rising along the sample is measured after 30 minutes in an environment of 20℃±2℃ and humidity of 65%±3%. Five samples are tested for each type of fabric, and the arithmetic mean is taken. The higher the value, the stronger the moisture wicking / absorption and perspiration wicking ability.

[0055] Volume resistivity testing was conducted according to the test method GB / T15662-2018 (Test Method for Volume Resistivity of Conductive and Antistatic Fabrics). Under conditioned conditions of 20℃±2℃ and 40%±2% relative humidity, a 100V voltage was applied to the sample using a three-electrode system. After stabilizing for 60 seconds, the surface resistance was measured, and the volume resistivity (unit: Ω·cm) was calculated. Five tests were performed for each fabric type, and the average value was taken. Lower volume resistivity indicates better antistatic performance (≤10 Ω·cm). 9 Ω·cm is a reference value for antistatic textiles).

[0056] The moisture evaporation rate was determined according to GB / T 21655.1-2008 (Evaluation of the moisture absorption and quick-drying properties of textiles - Part 1: Single-item combination test method). Under an environment of 20℃±2℃ and 65%±3% relative humidity, 0.2mL of distilled water was added to the surface of the sample, and the time (min) required for complete evaporation of the moisture was recorded. The evaporation rate (g / h) was calculated. Each group of samples was tested 5 times and the average value was taken. The higher the evaporation rate, the faster the fabric dries.

[0057] The average of the three test results was taken, and the following data was obtained and compiled into the table below: Example 1 99.1 162 <![CDATA[3.8×10 6 ]]> 0.31 Example 2 97.2 135 <![CDATA[3.6×10 6 ]]> 0.28 Example 3 98.6 156 <![CDATA[2.9×10 6 ]]> 0.34 Example 4 98.7 148 <![CDATA[2.5×10 6 ]]> 0.36 Comparative Example 1 89.4 130 <![CDATA[2.4×10 6 ]]> 0.32 Comparative Example 2 88.5 82 <![CDATA[2.2×10 6 ]]> 0.19 Comparative Example 3 90.6 96 <![CDATA[1.2×10 6 ]]> 0.22 Comparative Example 4 91.2 118 <![CDATA[2.4×10 6 ]]> 0.25 Comparative data leads to the conclusion that this composite fabric T-shirt, which combines antibacterial and moisture-wicking functions, and its preparation method utilize a core-skin composite spinning structure combined with thermosensitive matrine microcapsules. During use, the volume phase transition of the thermosensitive polymer at 32-34℃ allows the microcapsules to lock in antibacterial components under normal conditions to reduce loss. When body temperature rises or sweating occurs, matrine is rapidly released to kill bacteria. Simultaneously, hydrophilic modification of the skin layer and a cross-shaped or Y-shaped spinneret design create highly efficient moisture-wicking grooves on the fiber surface, significantly shortening the sweat diffusion path. This composite fabric can quickly guide sweat from the skin surface to the outside of the fabric for evaporation, avoiding a damp and sticky feeling. The conductive network of carbon nanotubes in the core layer can also promptly dissipate static charges generated by friction, reducing dust adsorption and keeping the fabric clean and breathable.

[0058] At the same time, it avoids the defects of traditional finished fabrics, such as stiffness and poor washability, and also has long-lasting and safe antibacterial protection capabilities, meeting the dual needs of high-performance sports and outdoor clothing for comfort and health.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A method for preparing a composite fabric with both antibacterial and moisture-wicking functions, characterized in that: The preparation steps include the following: S1. Preparation of thermosensitive antibacterial microcapsules: N-isopropylacrylamide, N,N'-methylenebisacrylamide, and matrine were added to deionized water at a mass ratio of 1:(0.08-0.12):(0.3-0.5) to prepare an aqueous solution. An emulsifier was added under a nitrogen atmosphere, and after emulsification, the temperature was lowered. An initiator was added to react, and the solution was dialyzed and freeze-dried to obtain thermosensitive matrine microcapsules with a volume phase transition temperature of 32-34℃. S2. Preparation of functionalized skin slices: Polyethylene terephthalate slices, polyethylene glycol 600, flame retardant, nano titanium dioxide, and thermosensitive matrine microcapsules are mixed in a high-speed mixer for 5-8 minutes at a mass ratio of 1:(0.12-0.18):(0.08-0.12):(0.02-0.05):(0.06-0.10). The mixture is then melt-blended, extruded, and water-cooled into pellets by a twin-screw extruder at 250-265℃ to obtain functionalized skin slices. S3. Preparation of conductive core layer slices: Polyethylene terephthalate slices, carbon nanotubes, nano zinc oxide, and dispersant polyvinyl butyral are mixed in a high-speed mixer at a mass ratio of 1:(0.06-0.10):(0.02-0.04):(0.02-0.03). The mixture is then melt-blended, extruded, and water-cooled into pellets using a twin-screw extruder to obtain conductive core layer slices. S4. Sheath-core composite spinning: Functionalized sheath slices and conductive core slices are dried separately and used as raw materials for sheath and core. They are then spun through a sheath-core composite spinneret to obtain modified polyester fibers. S5. Weaving and finishing: Modified polyester fibers are spun and woven into knitted fabrics, which are then treated with hot water and dried to produce composite fabrics with flame retardant, UV protection, antistatic, antibacterial and moisture-wicking functions.

2. The method for preparing a composite fabric with both antibacterial and moisture-wicking functions according to claim 1, characterized in that: The emulsifier is sodium dodecyl sulfate, and the amount used is 0.5-0.8% by mass of the aqueous solution; the initiator is potassium persulfate, and the amount used is 1.5-2.0% by mass of the aqueous solution.

3. The method for preparing a composite fabric with both antibacterial and moisture-wicking functions according to claim 1, characterized in that: The emulsification conditions are as follows: emulsify at 60-70℃ and 400-600r / min for 30-40min, then cool to 0-5℃; the initiator reaction conditions are as follows: continue stirring and reacting at 0-5℃ for 5-6h; the dialysis is performed using a dialysis bag with a molecular weight cutoff of 14000, and dialysis is performed in deionized water for 40-50h.

4. The method for preparing a composite fabric with both antibacterial and moisture-wicking functions according to claim 1, characterized in that: The drying conditions for the functionalized skin layer slices and the conductive core layer slices are as follows: the functionalized skin layer slices are dried at 260-270℃ for 4-6 hours, and the conductive core layer slices are dried at 275-285℃ for 5-7 hours.

5. The method for preparing a composite fabric with both antibacterial and moisture-wicking functions according to claim 1, characterized in that: The mass ratio of the skin layer to the core layer in the skin-core composite spinneret is 35:65 to 45:55; the spinneret orifice has one of the following irregular cross-sections: cross-shaped, Y-shaped, and trilobal; the length-to-diameter ratio of the spinneret orifice is 2.5:1 to 3.5:1; the spinning temperature is 275-285℃; and the winding speed is 2000-3200m / min.

6. The method for preparing a composite fabric with both antibacterial and moisture-wicking functions according to claim 1, characterized in that: After the nascent fibers exit the spinneret, they are asymmetrically cooled using a side-blowing method. The air temperature is 15-20℃, the air velocity is 0.3-0.6m / s, and the relative humidity is 65-75%. Subsequently, they undergo two-stage hot stretching. The first stage temperature is 80-90℃, and the second stage temperature is 120-140℃, with a total stretching ratio of 3.0-4.5 times. After stretching, they are heat-set at a temperature of 140-160℃ for 3-5 minutes.

7. The method for preparing a composite fabric with both antibacterial and moisture-wicking functions according to claim 1, characterized in that: The spinning process is as follows: modified polyester fiber is spun into 32S-40S single yarn through opening, carding, drawing, roving, and spinning processes; the weaving is carried out using a weft knitting circular knitting machine to weave a knitted fabric with a weight of 160-200g / m²; the hot water treatment temperature is 85-90℃ and the time is 10-15min; the drying temperature is 60-70℃.

8. A composite fabric T-shirt with both antibacterial and moisture-wicking functions, characterized in that: A composite fabric T-shirt with both antibacterial and moisture-wicking functions is obtained by the method for preparing a composite fabric with both antibacterial and moisture-wicking functions as described in any one of claims 1-7.