Fabric with moisture absorption and sweat releasing function and preparation method thereof

Abstract

The application relates to the technical field of functional fabric, and particularly discloses a fabric with moisture absorption and sweat releasing functions and a preparation method thereof. Modified polylactic acid fibers, cotton fibers and polyamide fibers are blended to obtain blended yarn, and then weaving is carried out to obtain the fabric. After the fabric is treated by being immersed into a finishing liquid containing a softener and a dispersant, the fabric with the moisture absorption and sweat releasing functions is obtained. The introduced imidazole salt functional group with positive charges has broad-spectrum antibacterial properties and good biological safety. A large number of hydrophilic groups such as amino groups and imino groups are introduced on the surface of polylactic acid, so that the moisture absorption capacity of the polylactic acid fibers is effectively improved. The cotton fibers have good moisture absorption performance. The hydrophilic functional group amide bond in the polyamide fibers and the special hollow structure enable the polyamide to have excellent heat conduction, cool feeling, sweat absorption and quick drying effects. The fabric obtained after blending and weaving has excellent washing resistance, excellent moisture absorption, sweat releasing and antibacterial properties, and is comfortable to wear.

Description

Technical Field

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

[0002] With rapid economic development and a significant improvement in people's living standards, people's pursuit of quality of life is constantly increasing. Their demands for clothing fabrics are no longer limited to the basic functions of covering, warmth, and protection; increasingly, they are demanding greater functionality and comfort. The human body constantly generates heat, and whether in normal physical activity or hot weather, the body sweats. Excessive sweat, if not promptly removed, can easily breed bacteria, harming health. This necessitates clothing fabrics with excellent moisture-wicking and antibacterial properties, capable of quickly absorbing sweat from the skin's surface and transferring it to the outer surface of the fabric for evaporation, keeping the skin dry and comfortable while reducing bacterial growth.

[0003] Chinese patent CN111267428B discloses a moisture-wicking school uniform fabric and its preparation method. The moisture-wicking school uniform fabric includes a moisture-wicking outer layer and a moisture-absorbing inner layer. The raw material for preparing the moisture-wicking outer layer is a blend of spandex fiber and cotton fiber. The raw materials for preparing the moisture-absorbing inner layer are cotton fiber, polyester fiber, and flax fiber. This fabric has a short soaking time, fast water absorption rate, and sweat can be absorbed by the fabric in time and transported to the outside of the fabric to keep the skin dry. It has good moisture-wicking function and the preparation method is simple and easy to operate. However, the antibacterial effect of this fabric is not good.

[0004] Chinese patent CN107630258B discloses a cross-shaped permanent cooling antibacterial regenerated fiber. It uses pulp with a high degree of polymerization and a high viscosity and high degree of esterification spinning solution. After being extruded from a cross-shaped nozzle, the nascent filaments and finished fibers maintain the cross-shaped cross section created by the nozzle structure under the comfortable coagulation bath and stretching action. The cross-shaped cross section increases the breathability of the fiber fabric, but the moisture absorption performance is not good, which affects the comfort of the fiber fabric, and the antibacterial effect is average. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a fabric with moisture-wicking and perspiration-absorbing functions and a method for preparing the same, resulting in a fabric with excellent moisture-wicking and perspiration-absorbing functions and antibacterial properties.

[0006] To achieve the above objectives, this invention discloses a method for preparing a fabric with moisture-wicking and perspiration-absorbing functions, comprising the following steps:

[0007] Step (1): Graphene oxide is ultrasonically dispersed in thionyl chloride. After uniform dispersion, a reaction occurs. After the reaction, the mixture is filtered, washed with tetrahydrofuran, and dried at 70-80℃ for 12 hours to obtain acyl-chlorographene.

[0008] Step (2): Acyl-chlorinated graphene is ultrasonically dispersed in N,N-dimethylformamide. After uniform dispersion, tetraethylenepentamine is added, stirred and mixed, and a reaction occurs. After the reaction, the mixture is filtered, washed with ethanol, and dried under vacuum at 60°C for 8 hours to obtain amino-modified graphene.

[0009] Step (3): The amino-modified graphene was ultrasonically dispersed in anhydrous ethanol. After uniform dispersion, 4-(1H-imidazol-1-yl)benzaldehyde was added, stirred and mixed, and the reaction was carried out. After the reaction, the graphene was washed with anhydrous ethanol and dried under vacuum at 60°C for 12 hours to obtain imidazolium-modified graphene.

[0010] Step (4): Add brominated polylactic acid fiber to acetone, mix evenly, add imidazole modified graphene, react in a nitrogen atmosphere, wash with ethyl acetate after reaction, and vacuum dry at 60°C for 12 hours to obtain modified polylactic acid fiber.

[0011] Step (5): Blend modified polylactic acid fiber, cotton fiber and nylon fiber to obtain blended yarn, and then weave it to obtain fabric.

[0012] The fabric is immersed in a finishing solution at a temperature of 50-60℃ for 2-3 hours. After immersion, it is dried at 60-70℃ for 1-2 hours, washed, and then dried at 65-75℃ for 2-3 hours to obtain a fabric with moisture-wicking properties.

[0013] Preferably, the mass ratio of graphene oxide to sulfoxide in step (1) is 100:(35000-40000).

[0014] Preferably, the reaction temperature in step (1) is 70-75℃ and the reaction time is 12-15h.

[0015] Preferably, in step (2), the mass ratio of acyl-chlorographene, N,N-dimethylformamide and tetraethylenepentamine is 100:(30000-35000):(42-55).

[0016] Preferably, the reaction temperature in step (2) is 85-95℃ and the reaction time is 18-24h.

[0017] Preferably, in step (3), the mass ratio of amino-modified graphene, anhydrous ethanol and 4-(1H-imidazol-1-yl)benzaldehyde is 100:(3200-4000):(50-75).

[0018] Preferably, the reaction temperature in step (3) is 30-35℃ and the reaction time is 12-15h.

[0019] Preferably, the preparation method of brominated polylactic acid fiber in step (4) includes the following steps:

[0020] S1. Mix polylactic acid fiber and sodium hydroxide solution in a mass ratio of 100:(420-550) evenly, and hydrolyze. After hydrolysis, wash with deionized water and dry at 50°C for 6 hours to obtain hydrolyzed polylactic acid fiber.

[0021] S2. After the hydrolyzed polylactic acid fiber and acetic acid are mixed evenly, pyridine and α-bromopropionyl bromide are added. The reaction occurs in a nitrogen atmosphere. After the reaction, the mixture is washed with deionized water and dried at 50°C for 6 hours to obtain brominated polylactic acid fiber.

[0022] Furthermore, the sodium hydroxide solution in S1 is an aqueous sodium hydroxide solution with a concentration of 0.01 mol / L.

[0023] Furthermore, the hydrolysis temperature in S1 is 37°C, and the hydrolysis time is 150 hours.

[0024] Furthermore, the mass ratio of hydrolyzed polylactic acid cellulose, acetate, pyridine and α-bromopropionyl bromide in S2 is 100:(4800-5200):(1.2-1.8):(9-12).

[0025] Furthermore, the reaction temperature in S2 is 25-35℃, and the reaction time is 18-24h.

[0026] Preferably, in step (4), the mass ratio of brominated polylactic acid fiber, acetone and imidazole modified graphene is 100:(1200-1500):(24-35).

[0027] Preferably, the reaction temperature in step (4) is 60-65℃ and the reaction time is 12-15h.

[0028] Preferably, in step (5), the mass ratio of modified polylactic acid fiber, cotton fiber and nylon fiber is 100:(105-142):(58-75). During the weaving process, the blended yarn is used as the warp and weft yarns and the weaving is carried out by the shuttle weaving process. The warp density is 152-160 yarns / inch and the weft density is 60-68 yarns / inch.

[0029] Preferably, the preparation method of the finishing agent in step (5) includes the following steps:

[0030] The finishing agent is obtained by mixing deionized water, softener and dispersant in a mass ratio of 100:(7-12):(0.5-1.2).

[0031] Preferably, the softener comprises a silicone softener.

[0032] Furthermore, the softener comprises diamino-terminated polydimethylsiloxane.

[0033] Preferably, the dispersant is vinyl bis-stearamide.

[0034] In this invention, graphene oxide is modified with sulfoxide to obtain acyl-chlorographene. The acyl chloride groups on the surface of the acyl-chlorographene react with the amino groups on tetraethylenepentamine, introducing a large number of unreacted amino and imino groups, as well as amide groups obtained after the reaction, onto the graphene surface, resulting in amino-modified graphene. The amino groups on the surface of the amino-modified graphene react with the aldehyde groups on 4-(1H-imidazol-1-yl)benzaldehyde, introducing a Schiff base and an imidazolium ring, resulting in imidazolium-modified graphene. Polylactic acid fibers are hydrolyzed using sodium hydroxide aqueous solution to obtain hydrolyzed polylactic acid fibers, which are then mixed with acetic acid, pyridine, and α-bromopropionyl bromide. Bromine atoms are introduced into the end groups of polylactic acid (PLA) fibers to obtain brominated PLA fibers. The brominated PLA fibers react with the imidazole rings on imidazole-modified graphene to introduce imidazole salts. Graphene and PLA undergo a grafting reaction to obtain modified PLA fibers. The modified PLA fibers, cotton fibers, and nylon fibers are then blended to obtain blended yarns, which are then woven to obtain fabrics. The fabrics are then immersed in a finishing solution containing softeners and dispersants. The softeners added to the finishing agents and the organosilicon segments introduced during the reaction help improve the hand feel of the fabrics. After drying, washing, and rinsing, a fabric with moisture-wicking properties is obtained.

[0035] The graphene used in this invention possesses excellent antibacterial properties, capable of rapidly and efficiently killing bacteria by cutting and disrupting cell membranes, thus achieving an antibacterial effect. Polylactic acid fiber is a novel biodegradable fiber combining the advantages of both natural and synthetic fibers, exhibiting moisture-wicking and quick-drying properties, as well as a skin-friendly, slightly acidic, and skin-friendly characteristic. Cotton fiber has excellent moisture absorption properties, and fabrics woven from it are comfortable to wear. Nylon fiber has a low initial modulus, high moisture regain, and high thermal conductivity. Nylon fabrics possess excellent characteristics such as a soft hand feel, good skin-friendliness, and a cool touch. The hydrophilic functional groups (amide bonds) and unique hollow structure of nylon give it excellent thermal conductivity and quick-drying properties.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] This invention utilizes small-sized graphene oxide. Modification of the graphene oxide effectively prevents its aggregation, allowing it to be uniformly dispersed in the fabric. The introduced positively charged imidazole salt functional groups attract negatively charged bacterial cell walls under electrostatic force, altering cell wall permeability and causing cell membrane charge imbalance, effectively killing bacteria. It exhibits broad-spectrum antibacterial properties and good biocompatibility. The introduced Schiff base also possesses excellent antibacterial efficacy. The abundant hydroxyl, amino, and amide functional groups on the fiber facilitate intermolecular forces, strengthening the bonds between fibers and improving the fabric's mechanical properties. The introduction of numerous hydrophilic groups such as amino and imino groups on the polylactic acid surface effectively improves the moisture absorption capacity of the polylactic acid fiber. The introduction of these hydrophilic groups further enhances the fabric's moisture-wicking ability. Utilizing the rapid heat dissipation inherent in graphene, the synergistic effect further improves the fabric's moisture-wicking efficiency. Compared to ordinary physical additives, it offers advantages such as washability and environmental friendliness. The resulting fabric has excellent moisture-wicking properties and is comfortable to wear. Attached Figure Description

[0038] Figure 1 This is a flowchart of the process for preparing a fabric with moisture-wicking function in this invention;

[0039] Figure 2 This is a line graph showing the test results of the water absorption rate of the fabrics with moisture-wicking function prepared in Examples 1-4 and Comparative Examples 1-2 of the present invention.

[0040] Figure 3 This is a line graph showing the test results of the water droplet diffusion time of the fabrics with moisture-wicking function prepared in Examples 1-4 and Comparative Examples 1-2 of the present invention.

[0041] Figure 4 This is a line graph showing the test results of the wicking height of the fabrics with moisture-wicking function prepared in Examples 1-4 and Comparative Examples 1-2 of the present invention. Detailed Implementation

[0042] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0043] Example 1

[0044] A method for preparing a fabric with moisture-wicking and perspiration-absorbing functions includes the following steps:

[0045] Step (1): Graphene oxide is ultrasonically dispersed in thionyl chloride, wherein the mass ratio of graphene oxide to thionyl chloride is 100:35000. After uniform dispersion, it is reacted at 70°C for 15 hours. After the reaction, it is filtered, washed with tetrahydrofuran, and dried at 70°C for 12 hours to obtain acyl-chlorographene.

[0046] Step (2): Acyl-chlorographene is ultrasonically dispersed in N,N-dimethylformamide. After uniform dispersion, tetraethylenepentamine is added, wherein the mass ratio of acyl-chlorographene, N,N-dimethylformamide and tetraethylenepentamine is 100:30000:42. The mixture is stirred and reacted at 85°C for 24 hours. After the reaction, the mixture is filtered, washed with ethanol, and dried under vacuum at 60°C for 8 hours to obtain amino-modified graphene.

[0047] Step (3): The amino-modified graphene was ultrasonically dispersed in anhydrous ethanol. After uniform dispersion, 4-(1H-imidazol-1-yl)benzaldehyde was added, wherein the mass ratio of amino-modified graphene, anhydrous ethanol and 4-(1H-imidazol-1-yl)benzaldehyde was 100:3200:50. The mixture was stirred and reacted at 30°C for 15 h. After the reaction, the graphene was washed with anhydrous ethanol and dried under vacuum at 60°C for 12 h to obtain imidazolium-modified graphene.

[0048] Step (4): Add brominated polylactic acid fiber to acetone, mix evenly, and then add imidazole modified graphene. The mass ratio of brominated polylactic acid fiber, acetone and imidazole modified graphene is 100:1200:24. The reaction occurs in a nitrogen atmosphere at a temperature of 60°C for 15 hours. After the reaction, wash with ethyl acetate and vacuum dry at 60°C for 12 hours to obtain modified polylactic acid fiber.

[0049] The preparation method of brominated polylactic acid fiber includes the following steps:

[0050] S1. Polylactic acid fiber with a mass ratio of 100:420 and sodium hydroxide aqueous solution with a concentration of 0.01mol / L are mixed evenly and hydrolyzed at 37°C for 150h. After hydrolysis, the mixture is washed with deionized water and dried at 50°C for 6h to obtain hydrolyzed polylactic acid fiber.

[0051] S2. After the hydrolyzed polylactic acid fiber and acetic acid are mixed evenly, pyridine and α-bromopropionyl bromide are added. The mass ratio of hydrolyzed polylactic acid fiber, acetic acid, pyridine and α-bromopropionyl bromide is 100:4800:1.2:9. The reaction is carried out at 25°C for 24 hours in a nitrogen atmosphere. After the reaction, the fiber is washed with deionized water and dried at 50°C for 6 hours to obtain brominated polylactic acid fiber.

[0052] Step (5): Blend modified polylactic acid fiber, cotton fiber and nylon fiber with a mass ratio of 100:105:58 to obtain blended yarn. Use the blended yarn as warp and weft yarns and weave it through a shuttle weaving process to obtain fabric.

[0053] The blended yarn has a yarn count of 38S (English count), a warp density of 152 ends / inch, and a weft density of 60 ends / inch.

[0054] Step (6): Mix deionized water, softener bisamino-terminated polydimethylsiloxane and dispersant vinyl bisstearamide in a mass ratio of 100:7:0.5 to obtain a finishing agent. Then immerse the fabric in the finishing solution for soaking treatment. The soaking temperature is 50℃ and the soaking time is 3h. After soaking treatment, dry at 60℃ for 2h, wash, and then dry at 65℃ for 3h to obtain a fabric with moisture-wicking function.

[0055] Example 2

[0056] A method for preparing a fabric with moisture-wicking and perspiration-absorbing functions includes the following steps:

[0057] Step (1): Graphene oxide is ultrasonically dispersed in thionyl chloride, wherein the mass ratio of graphene oxide to thionyl chloride is 100:38000. After uniform dispersion, it is reacted at 72°C for 14 hours. After the reaction, it is filtered, washed with tetrahydrofuran, and dried at 75°C for 12 hours to obtain acyl-chlorographene.

[0058] Step (2): Acyl-chlorographene is ultrasonically dispersed in N,N-dimethylformamide. After uniform dispersion, tetraethylenepentamine is added, wherein the mass ratio of acyl-chlorographene, N,N-dimethylformamide and tetraethylenepentamine is 100:32000:50. The mixture is stirred and reacted at 90°C for 22 hours. After the reaction, the mixture is filtered, washed with ethanol, and dried under vacuum at 60°C for 8 hours to obtain amino-modified graphene.

[0059] Step (3): The amino-modified graphene was ultrasonically dispersed in anhydrous ethanol. After uniform dispersion, 4-(1H-imidazol-1-yl)benzaldehyde was added, wherein the mass ratio of amino-modified graphene, anhydrous ethanol and 4-(1H-imidazol-1-yl)benzaldehyde was 100:3600:60. The mixture was stirred and reacted at 32°C for 14 h. After the reaction, the graphene was washed with anhydrous ethanol and vacuum dried at 60°C for 12 h to obtain imidazolium-modified graphene.

[0060] Step (4): Add brominated polylactic acid fiber to acetone, mix evenly, and then add imidazole modified graphene. The mass ratio of brominated polylactic acid fiber, acetone and imidazole modified graphene is 100:1350:30. The reaction takes place in a nitrogen atmosphere at a temperature of 62°C for 14 hours. After the reaction, wash with ethyl acetate and vacuum dry at 60°C for 12 hours to obtain modified polylactic acid fiber.

[0061] The preparation method of brominated polylactic acid fiber includes the following steps:

[0062] S1. Mix polylactic acid fiber with a mass ratio of 100:500 and sodium hydroxide aqueous solution with a concentration of 0.01mol / L evenly, and hydrolyze at 37℃ for 150h. After hydrolysis, wash with deionized water and dry at 50℃ for 6h to obtain hydrolyzed polylactic acid fiber.

[0063] S2. After the hydrolyzed polylactic acid fiber and acetic acid are mixed evenly, pyridine and α-bromopropionyl bromide are added. The mass ratio of hydrolyzed polylactic acid fiber, acetic acid, pyridine and α-bromopropionyl bromide is 100:5000:1.5:11. The reaction is carried out at 30°C for 22 hours in a nitrogen atmosphere. After the reaction, the fiber is washed with deionized water and dried at 50°C for 6 hours to obtain brominated polylactic acid fiber.

[0064] Step (5): Blend modified polylactic acid fiber, cotton fiber and nylon fiber in a mass ratio of 100:120:64 to obtain blended yarn. Use the blended yarn as warp and weft yarns and weave it through a shuttle weaving process to obtain fabric.

[0065] The blended yarn has a yarn count of 42S (English count), a warp density of 155 yarns / inch, and a weft density of 64 yarns / inch.

[0066] Step (6): Mix deionized water, softener bisamino-terminated polydimethylsiloxane and dispersant vinyl bisstearamide in a mass ratio of 100:10:0.9 to obtain a finishing agent. Then, immerse the fabric in the finishing solution for soaking treatment. The soaking temperature is 55℃ and the soaking time is 2.5h. After soaking treatment, dry at 65℃ for 1.5h, wash, and then dry at 70℃ for 2.5h to obtain a fabric with moisture-wicking function.

[0067] Example 3

[0068] A method for preparing a fabric with moisture-wicking and perspiration-absorbing functions includes the following steps:

[0069] Modified polylactic acid fibers were prepared using the same method as in Example 2;

[0070] Step (1): Blend modified polylactic acid fiber, cotton fiber and nylon fiber with a mass ratio of 100:132:70 to obtain blended yarn. Use the blended yarn as warp and weft yarns and weave it through a shuttle weaving process to obtain fabric.

[0071] The blended yarn has a yarn count of 40S (English count), a warp density of 158 yarns / inch, and a weft density of 66 yarns / inch.

[0072] Step (2): Mix deionized water, softener bisamino-terminated polydimethylsiloxane and dispersant vinyl bisstearamide in a mass ratio of 100:10:0.9 to obtain a finishing agent. Then, immerse the fabric in the finishing solution for soaking treatment. The soaking temperature is 55℃ and the soaking time is 2.5h. After soaking treatment, dry at 65℃ for 1.5h, wash, and then dry at 70℃ for 2.5h to obtain a fabric with moisture-wicking function.

[0073] Example 4

[0074] A method for preparing a fabric with moisture-wicking and perspiration-absorbing functions includes the following steps:

[0075] Step (1): Graphene oxide is ultrasonically dispersed in thionyl chloride, wherein the mass ratio of graphene oxide to thionyl chloride is 100:40000. After uniform dispersion, it is reacted at 75°C for 12 hours. After the reaction, it is filtered, washed with tetrahydrofuran, and dried at 80°C for 12 hours to obtain acyl-chlorographene.

[0076] Step (2): Acyl-chlorographene is ultrasonically dispersed in N,N-dimethylformamide. After uniform dispersion, tetraethylenepentamine is added, wherein the mass ratio of acyl-chlorographene, N,N-dimethylformamide and tetraethylenepentamine is 100:35000:55. The mixture is stirred and reacted at 95°C for 18 hours. After the reaction, the mixture is filtered, washed with ethanol, and dried under vacuum at 60°C for 8 hours to obtain amino-modified graphene.

[0077] Step (3): The amino-modified graphene was ultrasonically dispersed in anhydrous ethanol. After uniform dispersion, 4-(1H-imidazol-1-yl)benzaldehyde was added, wherein the mass ratio of amino-modified graphene, anhydrous ethanol and 4-(1H-imidazol-1-yl)benzaldehyde was 100:4000:75. The mixture was stirred and reacted at 35°C for 12 hours. After the reaction, the graphene was washed with anhydrous ethanol and dried under vacuum at 60°C for 12 hours to obtain imidazolium-modified graphene.

[0078] Step (4): Add brominated polylactic acid fiber to acetone, mix evenly, and then add imidazole modified graphene. The mass ratio of brominated polylactic acid fiber, acetone and imidazole modified graphene is 100:1500:35. The reaction takes place in a nitrogen atmosphere at a temperature of 65°C for 12 hours. After the reaction, wash with ethyl acetate and vacuum dry at 60°C for 12 hours to obtain modified polylactic acid fiber.

[0079] The preparation method of brominated polylactic acid fiber includes the following steps:

[0080] S1. Polylactic acid fiber with a mass ratio of 100:550 and sodium hydroxide aqueous solution with a concentration of 0.01mol / L are mixed evenly and hydrolyzed at 37°C for 150h. After hydrolysis, the fiber is washed with deionized water and dried at 50°C for 6h to obtain hydrolyzed polylactic acid fiber.

[0081] S2. After mixing the hydrolyzed polylactic acid fiber and acetic acid evenly, pyridine and α-bromopropionyl bromide are added. The mass ratio of hydrolyzed polylactic acid fiber, acetic acid, pyridine and α-bromopropionyl bromide is 100:5200:1.8:12. The mixture is reacted at 35°C for 18 hours under a nitrogen atmosphere. After the reaction, the mixture is washed with deionized water and dried at 50°C for 6 hours to obtain brominated polylactic acid fiber.

[0082] Step (5): Blend modified polylactic acid fiber, cotton fiber and nylon fiber in a mass ratio of 100:142:75 to obtain blended yarn. Use the blended yarn as warp and weft yarns and weave it through a shuttle weaving process to obtain fabric.

[0083] The blended yarn has a yarn count of 40S (English count), a warp density of 160 ends / inch, and a weft density of 68 ends / inch.

[0084] Step (6): Mix deionized water, softener bisamino-terminated polydimethylsiloxane and dispersant vinyl bisstearamide in a mass ratio of 100:12:1.2 to obtain a finishing agent. Then, immerse the fabric in the finishing solution for soaking treatment. The soaking temperature is 60℃ and the soaking time is 2h. After soaking treatment, dry at 70℃ for 1h, wash, and then dry at 75℃ for 2h to obtain a fabric with moisture-wicking function.

[0085] Comparative Example 1

[0086] A method for preparing a fabric with moisture-wicking and perspiration-absorbing functions includes the following steps:

[0087] Step (1): Graphene oxide is ultrasonically dispersed in N,N-dimethylformamide, and γ-aminopropyltriethoxysilane is added and stirred. The mass ratio of graphene oxide, N,N-dimethylformamide and γ-aminopropyltriethoxysilane is 100:32000:50. The reaction is carried out at 90°C for 22 h. After the reaction, the mixture is filtered, washed with ethanol, and dried under vacuum at 60°C for 8 h to obtain amino-modified graphene.

[0088] Step (2): The amino-modified graphene was ultrasonically dispersed in anhydrous ethanol. After uniform dispersion, 4-(1H-imidazol-1-yl)benzaldehyde was added, wherein the mass ratio of amino-modified graphene, anhydrous ethanol and 4-(1H-imidazol-1-yl)benzaldehyde was 100:3600:60. The mixture was stirred and reacted at 32°C for 14 hours. After the reaction, the graphene was washed with anhydrous ethanol and dried under vacuum at 60°C for 12 hours to obtain imidazolium-modified graphene.

[0089] Step (3): Add brominated polylactic acid fiber to acetone, mix evenly, and then add imidazole modified graphene. The mass ratio of brominated polylactic acid fiber, acetone and imidazole modified graphene is 100:1350:30. The reaction takes place in a nitrogen atmosphere at a temperature of 62°C for 14 hours. After the reaction, wash with ethyl acetate and vacuum dry at 60°C for 12 hours to obtain modified polylactic acid fiber.

[0090] The preparation method of brominated polylactic acid fiber includes the following steps:

[0091] S1. Mix polylactic acid fiber with a mass ratio of 100:500 and sodium hydroxide aqueous solution with a concentration of 0.01mol / L evenly, and hydrolyze at 37℃ for 150h. After hydrolysis, wash with deionized water and dry at 50℃ for 6h to obtain hydrolyzed polylactic acid fiber.

[0092] S2. After the hydrolyzed polylactic acid fiber and acetic acid are mixed evenly, pyridine and α-bromopropionyl bromide are added. The mass ratio of hydrolyzed polylactic acid fiber, acetic acid, pyridine and α-bromopropionyl bromide is 100:5000:1.5:11. The reaction is carried out at 30°C for 22 hours in a nitrogen atmosphere. After the reaction, the fiber is washed with deionized water and dried at 50°C for 6 hours to obtain brominated polylactic acid fiber.

[0093] Step (4): Blend modified polylactic acid fiber, cotton fiber and nylon fiber with a mass ratio of 100:132:70 to obtain blended yarn. Use the blended yarn as warp and weft yarns and weave it through a shuttle weaving process to obtain fabric.

[0094] The blended yarn has a yarn count of 40S (English count), a warp density of 158 yarns / inch, and a weft density of 66 yarns / inch.

[0095] Step (5): Mix deionized water, softener bisamino-terminated polydimethylsiloxane and dispersant vinyl bisstearamide in a mass ratio of 100:10:0.9 to obtain a finishing agent. Then, immerse the fabric in the finishing solution for soaking treatment. The soaking temperature is 55℃ and the soaking time is 2.5h. After soaking treatment, dry at 65℃ for 1.5h, wash, and then dry at 70℃ for 2.5h to obtain a fabric with moisture-wicking function.

[0096] Comparative Example 2

[0097] A method for preparing a fabric with moisture-wicking and perspiration-absorbing functions includes the following steps:

[0098] Step (1): Graphene oxide is ultrasonically dispersed in thionyl chloride, wherein the mass ratio of graphene oxide to thionyl chloride is 100:38000. After uniform dispersion, it is reacted at 72°C for 14 hours. After the reaction, it is filtered, washed with tetrahydrofuran, and dried at 75°C for 12 hours to obtain acyl-chlorographene.

[0099] Step (2): Acyl-chlorographene is ultrasonically dispersed in N,N-dimethylformamide. After uniform dispersion, tetraethylenepentamine is added, wherein the mass ratio of acyl-chlorographene, N,N-dimethylformamide and tetraethylenepentamine is 100:32000:50. The mixture is stirred and reacted at 90°C for 22 hours. After the reaction, the mixture is filtered, washed with ethanol, and dried under vacuum at 60°C for 8 hours to obtain amino-modified graphene.

[0100] Step (3): The amino-modified graphene was ultrasonically dispersed in anhydrous ethanol. After uniform dispersion, 4-(1H-imidazol-1-yl)benzaldehyde was added, wherein the mass ratio of amino-modified graphene, anhydrous ethanol and 4-(1H-imidazol-1-yl)benzaldehyde was 100:3600:60. The mixture was stirred and reacted at 32°C for 14 h. After the reaction, the graphene was washed with anhydrous ethanol and vacuum dried at 60°C for 12 h to obtain imidazolium-modified graphene.

[0101] Step (4): Add polylactic acid fiber to acetone, mix evenly, and then add imidazole modified graphene. The mass ratio of polylactic acid fiber, acetone and imidazole modified graphene is 100:1350:30. The reaction takes place in a nitrogen atmosphere at a temperature of 62°C for 14 hours. After the reaction, wash with ethyl acetate and vacuum dry at 60°C for 12 hours to obtain modified polylactic acid fiber.

[0102] Step (5): Blend modified polylactic acid fiber, cotton fiber and nylon fiber in a mass ratio of 100:132:70 to obtain blended yarn. Use the blended yarn as warp and weft yarns and weave it through a shuttle weaving process to obtain fabric.

[0103] The blended yarn has a yarn count of 40S (English count), a warp density of 158 yarns / inch, and a weft density of 66 yarns / inch.

[0104] Step (6): Mix deionized water, softener bisamino-terminated polydimethylsiloxane and dispersant vinyl bisstearamide in a mass ratio of 100:10:0.9 to obtain a finishing agent. Then, immerse the fabric in the finishing solution for soaking treatment. The soaking temperature is 55℃ and the soaking time is 2.5h. After soaking treatment, dry at 65℃ for 1.5h, wash, and then dry at 70℃ for 2.5h to obtain a fabric with moisture-wicking function.

[0105] The graphene oxide used in the embodiments and comparative examples of this invention is multilayer graphene oxide, purchased from Suzhou Hengqiu Technology Co., Ltd. (purity > 95wt%, thickness 3.4-8nm, sheet diameter 10-50μm); polylactic acid fiber is purchased from Jiangyin Gaoxin Chemical Fiber Co., Ltd., 5.56dtex; cotton fiber is purchased from Xinxiang Xincheng Cotton Products Co., Ltd.; nylon fiber is single-pore hollow, grade 28T12-2H9B, linear density 2.8tex / 12F, purchased from Toray Industries, Inc., Japan; unless otherwise specified, all raw materials used are commercially available.

[0106] The fabrics with moisture-wicking and perspiration-absorbing functions prepared in Examples 1-4 and Comparative Examples 1-2 were subjected to relevant performance tests, and the specific tests are as follows:

[0107] (1) Moisture absorption performance test: The moisture absorption performance of the fabric was tested according to the national standard GB / T21655.1-2008 "Evaluation of moisture absorption and quick-drying properties of textiles - Part 1: Single combination test method". The water absorption rate, water droplet diffusion time and wicking height of the fabric were tested respectively. Each group was tested three times. The specific test results are shown in Table 1:

[0108] Table 1

[0109]

[0110] According to the experimental test results in Table 1, the fabric prepared in this embodiment of the invention has excellent moisture absorption properties. The introduction of a large number of hydrophilic groups such as amino and imino groups on the surface of polylactic acid effectively improves the moisture absorption capacity of polylactic acid fibers. Cotton fibers also have excellent moisture absorption properties. The hydrophilic functional groups amide bonds and the special hollow structure in nylon fibers give nylon excellent thermal conductivity and quick-drying properties. The introduction of a large number of hydrophilic groups further improves the fabric's moisture absorption and wicking capabilities. Utilizing the rapid heat dissipation properties of graphene itself, the fabric's moisture absorption and wicking efficiency is further enhanced through a synergistic effect. Comparative Example 1 showed a significant decrease in moisture absorption performance, with a water absorption rate of 318%, a drip diffusion time of 2.5 s, and a wicking height of 115 mm.

[0111] (2) Antibacterial performance test: The antibacterial performance was quantitatively tested according to the national standard GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Shaking method". The washing fastness tester was used to test the antibacterial performance of the fabric against Escherichia coli and Staphylococcus aureus before washing and after 50 washes. Each group was tested three times, and the inhibition rate was calculated. The specific test results are shown in Table 2.

[0112] Table 2

[0113]

[0114] According to the experimental test results in Table 2, the fabric prepared in the embodiments of the present invention has excellent antibacterial properties. This is mainly due to the excellent antibacterial properties of graphene, which can quickly and efficiently kill bacteria by cutting and destroying the cell membrane. The introduced positively charged imidazole salt functional groups attract the negatively charged bacterial cell walls under the action of electrostatic force, thereby changing the permeability of the bacterial cell walls, causing an imbalance in cell membrane charge, and effectively killing bacteria. The introduced Schiff base also has good antibacterial effects. In Comparative Example 1, γ-aminopropyltriethoxysilane was used to modify graphene oxide and introduce amino groups. Compared with the embodiment where acyl chloride was first introduced on the surface of graphene oxide and then amino groups were introduced through the reaction of tetraethylenepentamine and acyl chloride groups, fewer active sites were provided, resulting in a decrease in antibacterial properties. In Comparative Example 2, no imidazole salt was introduced, resulting in a decrease in antibacterial properties.

[0115] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A method for preparing a fabric with moisture-wicking and perspiration-absorbing function, characterized in that, Includes the following steps: Step (1): Graphene oxide is ultrasonically dispersed in thionyl chloride. After uniform dispersion, a reaction occurs. After the reaction, the mixture is filtered, washed with tetrahydrofuran, and dried to obtain acyl-chromium graphene. Step (2): Ultrasonically disperse acyl-chlorographene in N,N-dimethylformamide. After uniform dispersion, add tetraethylenepentamine, stir and mix, and react. After reaction, filter, wash with ethanol, and dry to obtain amino-modified graphene. Step (3): The amino-modified graphene is ultrasonically dispersed in anhydrous ethanol. After uniform dispersion, 4-(1H-imidazol-1-yl)benzaldehyde is added, stirred and mixed, and the reaction occurs. After the reaction, the graphene is washed with anhydrous ethanol and dried to obtain imidazolium-modified graphene. The mass ratio of amino-modified graphene, anhydrous ethanol and 4-(1H-imidazol-1-yl)benzaldehyde is 100:(3200-4000):(50-75), the reaction temperature is 30-35℃, and the reaction time is 12-15h. Step (4): Add brominated polylactic acid fiber to acetone, mix evenly, add imidazole modified graphene, and react in a nitrogen atmosphere. After the reaction, wash with ethyl acetate and dry to obtain modified polylactic acid fiber. The mass ratio of brominated polylactic acid fiber, acetone and imidazole modified graphene is 100:(1200-1500):(24-35), the reaction temperature is 60-65℃, and the reaction time is 12-15h. Step (5): Blend modified polylactic acid fiber, cotton fiber and nylon fiber to obtain blended yarn, and then weave it to obtain fabric. The fabric is immersed in a finishing solution for soaking treatment. After soaking, it is dried, washed, and dried again to obtain a fabric with moisture-wicking function.

2. The method for preparing a fabric with moisture-wicking function according to claim 1, characterized in that, In step (2), the mass ratio of acyl-chlorographene, N,N-dimethylformamide and tetraethylenepentamine is 100:(30000-35000):(42-55), the reaction temperature is 85-95℃, and the reaction time is 18-24h.

3. The method for preparing a fabric with moisture-wicking function according to claim 1, characterized in that, The preparation method of brominated polylactic acid fiber in step (4) includes the following steps: S1. Mix polylactic acid fiber and sodium hydroxide solution in a mass ratio of 100:(420-550) evenly, and hydrolyze. After hydrolysis, wash with deionized water and dry to obtain hydrolyzed polylactic acid fiber. S2. After the hydrolyzed polylactic acid fiber and acetic acid are mixed evenly, pyridine and α-bromopropionyl bromide are added. The reaction occurs in a nitrogen atmosphere. After the reaction, the mixture is washed with deionized water and dried to obtain brominated polylactic acid fiber.

4. The method for preparing a fabric with moisture-wicking function according to claim 1, characterized in that, In step (5), the mass ratio of modified polylactic acid fiber, cotton fiber and nylon fiber is 100:(105-142):(58-75). During the weaving process, the blended yarn is used as the warp and weft yarns and the weaving is carried out by the shuttle weaving process. The warp density is 152-160 yarns / inch and the weft density is 60-68 yarns / inch.

5. The method for preparing a fabric with moisture-wicking function according to claim 1, characterized in that, The preparation method of the finishing solution in step (5) includes the following steps: The finishing solution is obtained by mixing deionized water, softener and dispersant in a mass ratio of 100:(7-12):(0.5-1.2).

6. The method for preparing a fabric with moisture-wicking function according to claim 5, characterized in that, The softener includes silicone softener.

7. The method for preparing a fabric with moisture-wicking function according to claim 5, characterized in that, Dispersants include vinyl bis-stearamide.

8. A fabric with moisture-wicking function prepared by the method of any one of claims 1-7.

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