Lightweight moisture-conducting functional fabric and preparation method thereof

Abstract

The invention discloses a light-weight moisture-conducting functional fabric and a preparation method thereof, and relates to the technical field of textile, the light-weight moisture-conducting functional fabric comprises an inner layer and an outer layer, the inner layer is obtained by blending polyester fibers and nylon special-shaped section fibers, and the outer layer is obtained by blending modified polypropylene fibers and hollow polyester fibers; the modified polypropylene fiber is obtained by mixing polypropylene slices and modified jade powder, melting, spinning and stretching; the prepared fabric has the light weight characteristic and the one-way moisture guiding capacity, sweat can be rapidly discharged out of the body, dry and comfortable isolation between the skin and the outside is achieved, and multiple health protection functions such as lasting antibiosis, efficient ultraviolet resistance and contact cool feeling are organically integrated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textiles, in particular to a lightweight moisture-conducting functional fabric and a preparation method thereof. BACKGROUND

[0002] With the development of social economy and the improvement of people's living standards, consumers' requirements for clothing fabrics have not been limited to basic shielding and warmth retention functions, but increasingly pursue the unity of comfort, functionality and health. Especially in the fields of sports and outdoor, leisure and fitness, and special professional clothing, developing textiles with lightweight, excellent moisture and heat comfort, and multi-functional composite has become an inevitable trend of industry technology development.

[0003] At present, in order to realize the moisture management function of the fabric, i.e. the so-called "moisture absorption and sweat release", the industry generally adopts the design idea of double-layer or multi-layer composite structure. The basic principle is to use the difference in water affinity between the inner and outer layers of the fabric to build a one-way "moisture pump" to quickly conduct the sweat on the skin surface to the outer layer of the fabric and evaporate quickly, thereby keeping the skin dry. However, the existing technology still has many deficiencies: first, many one-way moisture-conducting fabrics only rely on the hydrophilic and hydrophobic properties of the fibers themselves or realize it through post-finishing, and their moisture-conducting efficiency is limited. When a large amount of sweat is produced, it may still cause a sticky feeling, and the functional additives of post-finishing have poor washing fastness, and the functionality will decrease significantly with the increase of wearing and washing times. Second, the market demand for functional fabrics is increasingly diversified, and the single moisture-conducting function cannot meet the composite demand of consumers for antibacterial and deodorant, anti-ultraviolet, cool comfort and other functions.

[0004] In order to endow the fabric with the above-mentioned composite functions, the existing technology usually adopts the method of adding functional powder to the polymer melt in the spinning process. For example, by adding nano-silver, zinc oxide, etc. to achieve antibacterial effect; by adding titanium oxide, zinc oxide or ultraviolet absorber to achieve anti-ultraviolet effect; by adding mineral powder such as jade, mica to achieve cool feeling. However, this simple physical blending method has serious technical bottlenecks. On the one hand, most functional inorganic powders have poor interfacial compatibility with non-polar or weakly polar polymer matrix such as polypropylene and polyester, which makes it difficult for the powder to disperse uniformly in the melt and easy to agglomerate, which not only weakens its functional effect, but also seriously affects the stability of spinning and the mechanical properties of the final fiber, and even leads to broken filaments. On the other hand, the combination between the powder and the polymer is only physical, and the binding force is weak. During the subsequent stretching, weaving and daily use and washing process, the functional powder is easy to fall off from the fiber, resulting in poor durability of the function.

[0005] Especially worth mentioning is that polypropylene (PP) fiber is an ideal raw material for preparing lightweight functional fabric due to its low density (it is the lightest among all conventional fibers), good chemical stability, low cost and other advantages.

[0006] CN113844122A discloses a moisture-conducting and sweat-releasing school uniform fabric and a preparation method thereof, comprising the following raw materials and their weight fractions: pure cotton fiber 20-50% by mass; polypropylene fiber 20-60% by mass; polyester 10-30% by mass; bamboo charcoal fiber 10-20% by mass; natural fiber 10-20% by mass; flax fiber 10-35% by mass. The invention can effectively accelerate the speed of sweat absorption and drying when the school uniform is worn on the student, avoid the school uniform adhering to the student's skin when the student is sweating, improve the comfort of the student when wearing the school uniform in a state of heavy sweating, and also keep the skin surface dry, thereby reducing bacterial growth and preventing the phenomenon of odor caused by slow evaporation of sweat.

[0007] However, polypropylene is a highly crystalline non-polar polymer, which lacks active groups on its molecular chain, resulting in low surface energy and strong chemical inertness. There are fundamental difficulties in dyeing and functional modification by conventional chemical methods. How to effectively functionalize polypropylene and integrate various stable and durable functions (such as hydrophilic and moisture-conducting, antibacterial, and anti-ultraviolet) in one is a technical problem that needs to be solved in the field of functional textiles.

[0008] Therefore, it is of great market value and practical significance to develop a high-performance fabric that can effectively solve the problem of interface compatibility between functional powder and polypropylene matrix, stably combine various functional groups on the additive through chemical grafting method, and ultimately prepare a multifunctional fabric integrating lightweight, efficient one-way moisture-conducting, durable antibacterial, anti-ultraviolet, and cooling. SUMMARY

[0009] In order to solve the problems existing in the prior art, the purpose of the present application is to provide a lightweight moisture-conducting functional fabric and a preparation method thereof. The fabric not only has lightweight characteristics and one-way moisture-conducting ability, but also can quickly remove sweat from the body, realize dry isolation of the skin from the outside world, and organically integrate multiple health protection functions such as durable antibacterial, efficient anti-ultraviolet, and contact cooling.

[0010] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: A lightweight moisture-conducting functional fabric, comprising an inner layer and an outer layer, wherein the inner layer is obtained by blending polyester fiber and nylon profiled cross-section fiber, and the outer layer is obtained by blending modified polypropylene fiber and hollow polyester fiber.

[0011] Preferably, the modified polypropylene fiber is prepared by the following method steps: (1) Disperse the jade powder into an aqueous ethanol solution, adjust the pH of the system, then add 3-[3-carboxyallylamido]propyltriethoxysilane, reflux, filter, wash, and dry the product to obtain a pretreated jade powder; Functionalize the surface of the jade powder with a silane coupling agent: The main component of the jade powder is silicate, and its surface is rich in hydroxyl groups. In an acid-catalyzed aqueous ethanol solution, the ethoxyl groups (-OC2H5) in the 3-[3-carboxyallylamido]propyltriethoxysilane molecule hydrolyze into silanol groups (-Si-OH), which then undergo dehydration condensation with the hydroxyl groups on the surface of the jade powder to form very stable and hydrolysis-resistant silicon-oxygen-silicon (-Si-O-Si-) covalent bonds. This process successfully "grafts" an organic molecule onto the surface of the inorganic powder, introducing a carbon-carbon double bond for subsequent graft polymerization and a carboxyl group for esterification.

[0012] Preferably, in step (1), the jade is subjected to ultrafine pulverization to obtain a jade powder with a particle size of 5-20 μm.

[0013] Preferably, in step (1), the volume ratio of ethanol to deionized water in the aqueous ethanol solution is 85-95:5-15; the amount ratio of the jade powder, the aqueous ethanol solution, and 3-[3-carboxyallylamido]propyltriethoxysilane is 10 g:80-100 mL:0.5-3.5 g; the pH of the system is adjusted to 4-5 with glacial acetic acid; and the reflux reaction conditions are reflux at 65-80°C for 3-7 h.

[0014] (2) Disperse the pretreated jade powder into deionized water, ultrasonically treat, then add 3-sulfopropyl methacrylate potassium, stir to dissolve, slowly add potassium persulfate, and heat under a nitrogen atmosphere to react, then cool, suction filter, wash, and dry the product to obtain sulfonated jade powder; Radical graft polymerization on the surface of the pretreated jade powder: In an aqueous solution, potassium persulfate decomposes upon heating to generate sulfate radicals (SO4· - ), which initiate chain polymerization of 3-sulfopropyl methacrylate potassium (SPM) monomers in the solution. As the reaction proceeds, long chains of polymers containing a large number of sulfonic acid groups grow and firmly graft onto the surface of the jade powder, ultimately obtaining sulfonated jade powder coated with a hydrophilic polymer layer.

[0015] Preferably, in step (2), the amount ratio of the pretreated jade powder, deionized water, 3-sulfopropyl methacrylate potassium, and potassium persulfate is 10 g:100-120 mL:1-4 g:0.01-0.1 g; the ultrasonic treatment is for 15-30 min; and the heating reaction conditions are heating to 70-85°C for 5-8 h.

[0016] (3) Dispersing the sulfonated jade powder in deionized water, adding a silver nitrate aqueous solution in the dark, stirring and dispersing, and then slowly adding a newly prepared ascorbic acid aqueous solution under stirring. After the addition is complete, the reaction is carried out in the dark, and the product is centrifuged, washed, and dried to obtain silver-loaded jade powder; Nanosilver loaded on the powder surface: The second step grafted polymer chain carries a large amount of sulfonate anions (-SO3 - ), these groups have strong cation capture ability. When silver nitrate solution is added, positively charged silver ions (Ag + ) are adsorbed and concentrated on the sulfonate sites on the powder surface through electrostatic attraction. The subsequent addition of ascorbic acid, a mild reducing agent, reduces these "anchored" silver ions in situ into uncharged zero-valent silver atoms. These silver atoms rapidly aggregate into nano-sized particles, physically depositing and immobilizing them on and near the surface of the polymer chains, thus imparting the jade powder with its excellent antibacterial properties.

[0017] Preferably, in step (3), the dosage ratio of sulfonated jade powder, deionized water, silver nitrate aqueous solution, and ascorbic acid aqueous solution is 10 g: 80-100 mL: 10-20 mL: 5-10 mL; the concentration of the silver nitrate aqueous solution is 1-5 wt %; the concentration of the ascorbic acid aqueous solution is 4-10 wt %; and the reaction conditions in the dark are 25-35 ° C for 2-4 h.

[0018] (4) Dispersing the silver-loaded jade powder in DMF, adding UV-13 and 4-dimethylaminopyridine under nitrogen protection and stirring, cooling the system, then adding dicyclohexylcarbodiimide, stirring to react, filtering the product, washing, and drying to obtain modified jade powder; The UV absorber molecules are covalently bonded to the powder surface: Dicyclohexylcarbodiimide (DCC) first reacts with the carboxyl groups introduced in the first step to form a highly reactive intermediate. With the synergistic effect of the catalyst 4-dimethylaminopyridine (DMAP), the hydroxyl groups on the UV absorber UV-13 molecules act as nucleophiles, attacking the reactive intermediate to form a stable ester bond. Through this reaction, the UV-13 molecules are successfully bonded to the jade powder surface, endowing the final product with UV-absorbing properties.

[0019] Preferably, in step (4), the amount ratio of silver-loaded jade powder, DMF, UV-13, 4-dimethylaminopyridine, and dicyclohexylcarbodiimide is 10 g: 80-100 mL: 1-4 g: 0.05-0.5 g: 0.5-1 g; the system is cooled to 0-5°C, and the stirring reaction conditions are 25-35°C and the stirring reaction is carried out for 18-36 hours.

[0020] (5) Mixing polypropylene chips and modified jade powder, adding them into a melt spinning machine for melt spinning, and stretching to obtain modified polypropylene fibers; Preferably, in step (5), the usage ratio of polypropylene chips and modified jade powder is 100g:6~15g; and the melt spinning temperature is 260~280℃.

[0021] Preferably, the nylon special-shaped cross-section fiber is prepared by the following method steps: nylon slices are placed in a screw extruder for melting, the discharge amount of the melt is controlled by a metering pump, and the nylon special-shaped cross-section fiber is spun through a special-shaped spinneret; the special-shaped spinneret has a cross-shaped, Y-shaped, W-shaped or T-shaped special-shaped cross-section.

[0022] The present invention also claims protection for a method for preparing the lightweight moisture-conducting functional fabric, comprising the following steps: mixing polyester fiber and nylon special-section fiber in a ratio of 6~7:3~4 and spinning the mixture to form a blended yarn, and weaving the blended yarn into an inner layer through a loom; mixing modified polypropylene fiber and hollow polyester fiber in a ratio of 6~7:3~4 and spinning the mixture to form a blended yarn, and weaving the blended yarn into an outer layer through a loom; connecting the inner layer and the outer layer by a knot warp to obtain the lightweight moisture-conducting functional fabric.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. The lightweight moisture-conducting functional fabric designed by the present invention achieves unidirectional moisture conduction and wearing comfort through its unique double-layer structure. The inner layer uses nylon special-section fibers, which utilize the capillary effect generated by their physical groove structure to absorb sweat and moisture from the skin surface and efficiently transfer them. The outer layer is mainly composed of modified polypropylene fibers. The polypropylene matrix maintains a high degree of hydrophobicity, which can prevent the intrusion of external water and the back-seepage of internal moisture. The modified jade powder evenly dispersed inside the fiber has hydrophilic sites on its surface that can quickly capture and forcibly spread moisture from the inner layer, greatly increasing the evaporation area. Assisted by the lightweight and specific surface area advantages of the hollow polyester fiber, it ultimately forms an efficient moisture management system of "strong dehumidification in the inner layer and quick-drying resistance in the outer layer", ensuring that the human body remains dry at all times.

[0024] 2. The application provides a preparation method of modified jade powder, and the reaction sequence is the key to ensure the successful combination of multiple functions. The process first introduces "double bonds" for subsequent graft polymerization and "carboxyl groups" for final esterification through a one-time introduction of a silane coupling agent; then, the double bond is used for the graft polymerization of sulfonate monomers, which introduces strong hydrophilic groups while retaining the weak carboxyl groups. The next step is the most critical: using the huge difference in acidity between the sulfonic acid group (strong acid) and the carboxyl group (weak acid) to achieve "selective anchoring" of silver ions, that is, silver ions will preferentially and firmly bind to ionized sulfonate, thereby being reduced in situ, which ensures silver loading efficiency and perfectly avoids the consumption of carboxyl groups, which are essential for subsequent esterification reactions. The superiority of this sequence lies in its avoidance of the fatal process defect of the "esterification first, then silver loading" scheme, which cannot be performed in aqueous phase due to the hydrophobicity of the product, and is the best path to achieve efficient bonding of all functional groups without interference.

[0025] 3. The application provides a modified jade powder. First, the micron-sized particle size of jade powder and its inherent specific heat capacity characteristics give the fiber an instantaneous and long-lasting cool feeling experience when it comes into contact with the skin. Second, the large number of grafted sulfonic acid groups as strong polar hydrophilic sites greatly improve the moisture conductivity of the originally hydrophobic polypropylene fiber and ensure uniform distribution of the powder in the polypropylene melt as a dispersing agent. Third, the in-situ generated nano-silver particles as a safe and efficient broad-spectrum antibacterial agent are firmly anchored on the surface of the powder, giving the fiber long-lasting and washable antibacterial and odor-resistant functions. Finally, the UV-13 molecules connected by covalent bonds give the fiber excellent ultraviolet resistance, effectively shielding UVA and UVB. The synergistic effect of these four functions (cooling, moisture conductivity, antibacterial, and ultraviolet resistance) enables the functional fabric to achieve superior overall performance. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, the following embodiments will be further described. Of course, the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0027] Unless otherwise specified, the chemical reagents and materials in the present application are purchased through market channels or synthesized from raw materials purchased through market channels.

[0028] Hollow polyester fiber filament specification: DTY 75D / 72F; Polyester fiber filament specification: DTY 75D / 144F; The polypropylene chip is purchased from Luoyang Branch of China Petroleum Chemical Industry Co., Ltd., and the model is PPH-Y35X.

[0029] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) ultrafine grinding jade to obtain jade powder with a particle size of 5-20 μm, dispersing 10 g of the jade powder into 80-100 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 85-95:5-15), adjusting the pH of the system to 4-5 by using glacial acetic acid, then adding 0.5-3.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane, and refluxing at 65-80 °C for 3-7 h, filtering, washing and drying the product to obtain pretreated jade powder; (2) dispersing 10 g of the pretreated jade powder into 100-120 mL of deionized water, ultrasonically treating for 15-30 min, then adding 1-4 g of 3-sulfopropyl methacrylate potassium, stirring to dissolve, slowly adding 0.01-0.1 g of potassium persulfate, and reacting at 70-85 °C for 5-8 h under a nitrogen atmosphere, cooling, suction filtering, washing and drying the product to obtain sulfonated jade powder; (3) dispersing 10 g of the sulfonated jade powder into 80-100 mL of deionized water, adding 10-20 mL of a 1-5 wt% silver nitrate aqueous solution under light shielding, stirring and dispersing, then slowly adding 5-10 mL of a freshly prepared 4-10 wt% ascorbic acid aqueous solution under stirring, reacting at 25-35 °C for 2-4 h after the dropping is completed, centrifuging, washing and drying the product to obtain silver-loaded jade powder; (4) dispersing 10 g of the silver-loaded jade powder into 80-100 mL of DMF, adding 1-4 g of UV-13 and 0.05-0.5 g of 4-dimethylaminopyridine under stirring and nitrogen protection, cooling the system to 0-5 °C, then adding 0.5-1 g of dicyclohexyl carbodiimide, and stirring at 25-35 °C for 18-36 h, suction filtering, washing and drying the product to obtain modified jade powder; (5) mixing 100 g of polypropylene chips and 6-15 g of the modified jade powder, and melt spinning at 260-280 °C by using a melt spinning machine to obtain modified polypropylene fibers; (6) melting nylon chips in a screw extruder, controlling the discharge amount of the melt by using a metering pump, and spinning into the nylon profiled cross-section fiber through a profiled spinneret; the profiled spinneret has a cross-shaped or Y-shaped or W-shaped or T-shaped profiled cross-section.

[0030] (7) mixing polyester fibers and the nylon profiled cross-section fiber according to a ratio of 6-7:3-4, and spinning to obtain a blended yarn, and weaving the blended yarn into an inner layer; mixing the modified polypropylene fibers and the hollow polyester fibers according to a ratio of 6-7:3-4, and spinning to obtain a blended yarn, and weaving the blended yarn into an outer layer; connecting the inner layer and the outer layer by using binding warp to obtain the lightweight moisture-conducting functional fabric.

[0031] The application will be further described below by specific examples.

[0032] Example 1

[0033] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) The jade is subjected to ultrafine pulverization treatment to obtain a jade powder with a particle size of 10-20 μm. 10 g of the jade powder is dispersed in 90 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 95:5), the pH of the system is adjusted to 4.5 by glacial acetic acid, then 3.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane is added, and reflux reaction is carried out at 80°C for 3 h. The product is filtered, washed and dried to obtain a pretreated jade powder; (2) 10 g of the pretreated jade powder is dispersed in 110 mL of deionized water, and ultrasonic treatment is carried out for 20 min. Then 4 g of 3-sulfonic acid propyl potassium methacrylate is added and dissolved by stirring, 0.1 g of potassium persulfate is slowly added, and the temperature is raised to 85°C under a nitrogen atmosphere for reaction for 5 h. The product is cooled, suction filtered, washed and dried to obtain sulfonated jade powder; (3) 10 g of the sulfonated jade powder is dispersed in 90 mL of deionized water, 20 mL of a 3 wt% silver nitrate aqueous solution is added under light shielding, and then dispersed by stirring. Then 10 mL of a freshly prepared 6 wt% ascorbic acid aqueous solution is slowly added under stirring, and after the dropwise addition is completed, reaction is carried out at 35°C under light shielding for 2 h. The product is centrifuged, washed and dried to obtain silver-loaded jade powder; (4) 10 g of the silver-loaded jade powder is dispersed in 90 mL of DMF, 4 g of UV-13 and 0.5 g of 4-dimethylaminopyridine are added under stirring and nitrogen protection, the system is cooled to 2°C, then 1 g of dicyclohexyl carbodiimide is added, and stirring reaction is carried out at 35°C for 18 h. The product is suction filtered, washed and dried to obtain modified jade powder; (5) 100 g of polypropylene chips and 15 g of the modified jade powder are mixed, and then fed into a melt spinning machine to be melt spun at 270°C. After stretching, modified polypropylene fibers are obtained; (6) Nylon chips are fed into a screw extruder to be melted. The discharge amount of the melt is controlled by a metering pump, and the nylon profiled cross-section fibers are prepared by spinning through a Y-shaped profiled spinneret; (7) Polyester fibers and the nylon profiled cross-section fibers are mixed at a ratio of 6:4, and then spun to prepare a blended yarn. The blended yarn is woven into an inner layer by a weaving machine. Modified polypropylene fibers and hollow polyester fibers are mixed at a ratio of 6:4, and then spun to prepare a blended yarn. The blended yarn is woven into an outer layer by a weaving machine. The inner layer and the outer layer are connected by a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0034] Example 2

[0035] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) The jade is subjected to ultrafine pulverization treatment to obtain a jade powder with a particle size of 10-20 μm. 10 g of the jade powder is dispersed in 90 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 95:5), the pH of the system is adjusted to 4.5 by glacial acetic acid, then 2.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane is added, and reflux reaction is carried out at 75°C for 4 h. The product is filtered, washed and dried to obtain a pretreated jade powder; (2) 10 g of the pretreated jade powder is dispersed in 110 mL of deionized water, and ultrasonic treatment is carried out for 20 min. Then 3 g of 3-sulfopropyl methacrylate potassium is added and dissolved by stirring, 0.08 g of potassium persulfate is slowly added, and reaction is carried out at 80°C for 6 h under a nitrogen atmosphere. The product is cooled, suction filtered, washed and dried to obtain sulfonated jade powder; (3) 10 g of the sulfonated jade powder is dispersed in 90 mL of deionized water, 18 mL of a 3wt% silver nitrate aqueous solution is added under light shielding, and stirring and dispersion are carried out. Then 8 mL of a freshly prepared 6wt% ascorbic acid aqueous solution is slowly added under stirring, and reaction is carried out at 30°C for 3 h after the dropwise addition is completed. The product is centrifuged, washed and dried to obtain silver-loaded jade powder; (4) 10 g of the silver-loaded jade powder is dispersed in 90 mL of DMF, 3 g of UV-13 and 0.4 g of 4-dimethylaminopyridine are added under nitrogen protection and stirring, the system is cooled to 2°C, then 0.8 g of dicyclohexyl carbodiimide is added, and stirring reaction is carried out at 30°C for 24 h. The product is suction filtered, washed and dried to obtain modified jade powder; (5) 100 g of polypropylene chips and 12 g of the modified jade powder are mixed, and are fed into a melt spinning machine to be melt spun at 270°C. Stretching is carried out to obtain modified polypropylene fibers; (6) Nylon chips are fed into a screw extruder to be melted. The discharge amount of the melt is controlled by a metering pump, and the nylon profiled cross-section fiber is prepared by spinning through a Y-shaped profiled spinneret; (7) Polyester fibers and the nylon profiled cross-section fiber are mixed at a ratio of 6:4 to be spun into blended yarn, and the blended yarn is woven into an inner layer by a weaving machine. Modified polypropylene fibers and hollow polyester fibers are mixed at a ratio of 6:4 to be spun into blended yarn, and the blended yarn is woven into an outer layer by a weaving machine. The inner layer and the outer layer are connected by a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0036] Example 3

[0037] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) The jade is subjected to ultrafine pulverization treatment to obtain a jade powder with a particle size of 10-20 μm. 10 g of the jade powder is dispersed in 90 mL of an ethanol aqueous solution (volume ratio of ethanol to deionized water is 95:5), the pH of the system is adjusted to 4.5 with glacial acetic acid, then 1.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane is added, and reflux reaction is carried out at 70°C for 5 h. The product is filtered, washed and dried to obtain a pretreated jade powder; (2) 10 g of the pretreated jade powder is dispersed in 110 mL of deionized water, and ultrasonic treatment is carried out for 20 min. Then 2 g of 3-sulfopropyl potassium methacrylate is added, and stirring is carried out to dissolve it. 0.04 g of potassium persulfate is slowly added, and the temperature is increased to 75°C under a nitrogen atmosphere to react for 6 h. The product is cooled, suction filtered, washed and dried to obtain a sulfonated jade powder; (3) 10 g of the sulfonated jade powder is dispersed in 90 mL of deionized water, and 14 mL of a 3 wt% silver nitrate aqueous solution is added under light shielding. Stirring and dispersion are carried out, then 6 mL of a freshly prepared 6 wt% ascorbic acid aqueous solution is slowly added under stirring. After dropwise addition is completed, reaction is carried out at 30°C under light shielding for 3 h. The product is centrifuged, washed and dried to obtain a silver-loaded jade powder; (4) 10 g of the silver-loaded jade powder is dispersed in 90 mL of DMF, and 2 g of UV-13 and 0.2 g of 4-dimethylaminopyridine are added under stirring and nitrogen protection. The system is cooled to 2°C, then 0.7 g of dicyclohexyl carbodiimide is added, and stirring reaction is carried out at 30°C for 30 h. The product is suction filtered, washed and dried to obtain a modified jade powder; (5) 100 g of polypropylene chips and 9 g of the modified jade powder are mixed, and are added to a melt spinning machine to be melt spun at 270°C. Stretching is carried out to obtain a modified polypropylene fiber; (6) Nylon chips are put into a screw extruder to be melted. The discharge amount of the melt is controlled by a metering pump, and the nylon profiled cross-section fiber is prepared by spinning through a Y-shaped profiled spinneret; (7) Polyester fibers and the nylon profiled cross-section fiber are mixed at a ratio of 6:4 to be spun into a blended yarn. The blended yarn is woven into an inner layer by a weaving machine. Modified polypropylene fibers and hollow polyester fibers are mixed at a ratio of 6:4 to be spun into a blended yarn. The blended yarn is woven into an outer layer by a weaving machine. The inner layer and the outer layer are connected by a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0038] Example 4

[0039] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) The jade is subjected to ultrafine pulverization treatment to obtain a jade powder with a particle size of 10-20 μm. 10 g of the jade powder is dispersed in 90 mL of an ethanol aqueous solution (volume ratio of ethanol to deionized water is 95:5), the pH of the system is adjusted to 4.5 with glacial acetic acid, then 0.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane is added, and reflux reaction is carried out at 65°C for 7 h. The product is filtered, washed and dried to obtain a pretreated jade powder; (2) 10 g of the pretreated jade powder is dispersed in 110 mL of deionized water, and ultrasonic treatment is carried out for 20 min. Then 1 g of 3-sulfopropyl potassium methacrylate is added, and stirring is carried out to dissolve it. 0.01 g of potassium persulfate is slowly added, and reaction is carried out at 70°C for 8 h under a nitrogen atmosphere. The product is cooled, suction filtered, washed and dried to obtain a sulfonated jade powder; (3) 10 g of the sulfonated jade powder is dispersed in 90 mL of deionized water, and 10 mL of a 3 wt% silver nitrate aqueous solution is added under light shielding. Stirring and dispersion are carried out, then 5 mL of a freshly prepared 6 wt% ascorbic acid aqueous solution is slowly added under stirring. After dropwise addition is completed, reaction is carried out at 25°C for 4 h under light shielding. The product is centrifuged, washed and dried to obtain a silver-loaded jade powder; (4) 10 g of the silver-loaded jade powder is dispersed in 90 mL of DMF, and 1 g of UV-13 and 0.05 g of 4-dimethylaminopyridine are added under nitrogen protection and stirring. The system is cooled to 2°C, then 0.5 g of dicyclohexyl carbodiimide is added, and stirring reaction is carried out at 25°C for 36 h. The product is suction filtered, washed and dried to obtain a modified jade powder; (5) 100 g of polypropylene chips and 6 g of the modified jade powder are mixed, and are fed into a melt spinning machine to be melt spun at 270°C. Stretching is carried out to obtain a modified polypropylene fiber; (6) Nylon chips are fed into a screw extruder to be melted. The discharge amount of the melt is controlled by a metering pump, and the nylon profiled cross-section fiber is prepared by spinning through a Y-shaped profiled spinneret; (7) Polyester fibers and the nylon profiled cross-section fiber are mixed at a ratio of 6:4 to be spun into a blended yarn. The blended yarn is woven into an inner layer by a weaving machine. Modified polypropylene fibers and hollow polyester fibers are mixed at a ratio of 6:4 to be spun into a blended yarn. The blended yarn is woven into an outer layer by a weaving machine. The inner layer and the outer layer are connected by a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0040] Comparative Example 1

[0041] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) jadeite is subjected to ultrafine pulverization treatment to obtain jadeite powder with a particle size of 10-20 μm, 10 g of the jadeite powder is dispersed in 90 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 95:5), the pH of the system is adjusted to 4.5 with glacial acetic acid, then 3.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane is added, and reflux reaction is carried out at 80°C for 3 h, and the product is filtered, washed and dried to obtain pretreated jadeite powder; (2) 10 g of the pretreated jadeite powder is dispersed in 110 mL of deionized water, and ultrasonic treatment is carried out for 20 min, then 4 g of 3-sulfopropyl methacrylate potassium is added, stirring is performed to dissolve it, 0.1 g of potassium persulfate is slowly added, the temperature is increased to 85°C under a nitrogen atmosphere, and reaction is carried out for 5 h, and the product is cooled, suction filtered, washed and dried to obtain sulfonated jadeite powder; (3) 10 g of the sulfonated jadeite powder is dispersed in 90 mL of DMF, 4 g of UV-13 and 0.5 g of 4-dimethylaminopyridine are added under nitrogen protection and stirring, the system is cooled to 2°C, then 1 g of dicyclohexyl carbodiimide is added, and stirring reaction is carried out at 35°C for 18 h, and the product is suction filtered, washed and dried to obtain esterified jadeite powder; (4) 10 g of the esterified jadeite powder is dispersed in 90 mL of deionized water, 20 mL of 3wt% silver nitrate aqueous solution is added under light shielding, stirring and dispersion are performed, then 10 mL of 6wt% ascorbic acid aqueous solution prepared on site is slowly added under stirring, after dropwise addition is completed, reaction is carried out under light shielding at 35°C for 2 h, and the product is centrifuged, washed and dried to obtain modified jadeite powder; (5) 100 g of polypropylene chips and 15 g of the modified jadeite powder are mixed, and are added to a melt spinning machine to be melt spun at 270°C, and stretching is carried out to obtain modified polypropylene fibers; (6) nylon chips are put into a screw extruder to be melted, the discharge amount of the melt is controlled by a metering pump, and the nylon profiled cross-section fiber is prepared by spinning through a Y-shaped profiled spinneret; (7) polyester fibers and the nylon profiled cross-section fiber are mixed in a proportion of 6:4 to be spun into blended yarn, and the blended yarn is woven into an inner layer by a weaving machine; modified polypropylene fibers and hollow polyester fibers are mixed in a proportion of 6:4 to be spun into blended yarn, and the blended yarn is woven into an outer layer by a weaving machine; the inner layer and the outer layer are connected by a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0042] Comparative Example 2

[0043] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) jadeite is subjected to ultrafine pulverization treatment to obtain jadeite powder with a particle size of 10-20 μm, 10 g of the jadeite powder is dispersed in 90 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 95:5), the pH of the system is adjusted to 4.5 by glacial acetic acid, then 3.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane is added, and reflux reaction is carried out at 80°C for 3 h, and the product is filtered, washed and dried to obtain pretreated jadeite powder; (2) 10 g of the pretreated jadeite powder is dispersed in 110 mL of deionized water, and ultrasonic treatment is carried out for 20 min, then 4 g of 3-sulfopropyl potassium methacrylate is added, stirring is performed to dissolve it, 0.1 g of potassium persulfate is slowly added, and reaction is carried out at 85°C for 5 h under a nitrogen atmosphere, and the product is cooled, suction filtered, washed and dried to obtain sulfonated jadeite powder; (3) 10 g of the sulfonated jadeite powder is dispersed in 90 mL of deionized water, 20 mL of a 3wt% silver nitrate aqueous solution is added under light shielding, stirring and dispersion are performed, then 10 mL of a freshly prepared 6wt% ascorbic acid aqueous solution is slowly added under stirring, after dropwise addition is completed, reaction is carried out at 35°C for 2 h under light shielding, and the product is centrifuged, washed and dried to obtain silver-loaded jadeite powder; (4) 100 g of polypropylene chips and 15 g of the silver-loaded jadeite powder are mixed, and are fed into a melt spinning machine to be melt spun at 270°C, and are stretched to obtain modified polypropylene fibers; (5) nylon chips are fed into a screw extruder to be melted, the discharge amount of the melt is controlled by a metering pump, and the nylon profiled cross-section fiber is prepared by spinning through a Y-shaped profiled spinneret; (7) the polyester fiber and the nylon profiled cross-section fiber are mixed at a ratio of 6:4 to be spun into blended yarn, and the blended yarn is woven into an inner layer by a weaving machine; the modified polypropylene fiber and the hollow polyester fiber are mixed at a ratio of 6:4 to be spun into blended yarn, and the blended yarn is woven into an outer layer by a weaving machine; and the inner layer and the outer layer are connected by a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0044] Comparative Example 3

[0045] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) jadeite is subjected to ultrafine pulverization treatment to obtain jadeite powder with a particle size of 10-20 μm, 10 g of the jadeite powder is dispersed in 90 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 95:5), the pH of the system is adjusted to 4.5 by glacial acetic acid, then 3.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane is added, and reflux reaction is carried out at 80°C for 3 h, and the product is filtered, washed and dried to obtain pretreated jadeite powder; (2) 10 g of the pretreated jade powder was dispersed in 90 mL of deionized water, 20 mL of 3 wt% silver nitrate aqueous solution was added under light protection, and then stirred and dispersed, followed by slowly adding 10 mL of freshly prepared 6 wt% ascorbic acid aqueous solution under stirring, and then the mixture was reacted at 35°C for 2 h under light protection. The product was centrifuged, washed, and dried to obtain the silver-loaded jade powder; (3) 10 g of the silver-loaded jade powder was dispersed in 90 mL of DMF, 4 g of UV-13 and 0.5 g of 4-dimethylaminopyridine were added under nitrogen protection and stirring, the system was cooled to 2°C, and then 1 g of dicyclohexyl carbodiimide was added. The mixture was stirred and reacted at 35°C for 18 h. The product was filtered, washed, and dried to obtain the modified jade powder; (4) 100 g of polypropylene chips and 15 g of the modified jade powder were mixed and fed into a melt spinning machine to be melt spun at 270°C, and then stretched to obtain the modified polypropylene fiber; (5) The nylon chips were fed into a screw extruder to be melted, the discharge amount of the melt was controlled by a metering pump, and then the nylon profiled cross-section fiber was prepared by using a Y-shaped profiled spinneret; (6) The polyester fiber and the nylon profiled cross-section fiber were mixed at a ratio of 6:4, and then spun to obtain a blended yarn. The blended yarn was woven into an inner layer by using a weaving machine. The modified polypropylene fiber and the hollow polyester fiber were mixed at a ratio of 6:4, and then spun to obtain a blended yarn. The blended yarn was woven into an outer layer by using a weaving machine. The inner layer and the outer layer were connected by using a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0046] Comparative Example 4

[0047] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps: (1) The jade was subjected to ultrafine pulverization treatment to obtain a jade powder with a particle size of 10-20 μm. 10 g of the jade powder was dispersed in 90 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water was 95:5), the pH of the system was adjusted to 4.5 by using glacial acetic acid, and then 3.5 g of 3-[3-carboxyallyl amido] propyl triethoxysilane was added. The mixture was refluxed at 80°C for 3 h. The product was filtered, washed, and dried to obtain a pretreated jade powder; (2) 100 g of polypropylene chips and 15 g of the modified jade powder were mixed and fed into a melt spinning machine to be melt spun at 270°C, and then stretched to obtain the modified polypropylene fiber; (3) The nylon chips were fed into a screw extruder to be melted, the discharge amount of the melt was controlled by a metering pump, and then the nylon profiled cross-section fiber was prepared by using a Y-shaped profiled spinneret; (4) the polyester fiber and the nylon special-shaped cross-section fiber are mixed in a ratio of 6:4 to be spun into a blended yarn, the blended yarn is woven into an inner layer by a weaving machine; the modified polypropylene fiber and the hollow polyester fiber are mixed in a ratio of 6:4 to be spun into a blended yarn, the blended yarn is woven into an outer layer by a weaving machine; the inner layer and the outer layer are connected by a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0048] The fabric prepared in Examples 1-4 and Comparative Examples 1-4 is subjected to performance testing, the cooling value of the fabric is detected at 5 min under the temperature (40±0.5) ℃ and humidity (90±3)% according to the method reported in the paper “Research on Test Method of Heat Dissipation Functional Fabric” by Chen Fengmei published in “China Textile Inspection” on pages 135-137 in February 2012; the water absorption rate is tested according to 8.1 of GB / T 21655.1-2023 “Textiles-Evaluation of Moisture Management-Part 1: Single Component Test Method”; the air permeability is tested by using a fabric air permeability tester according to GB / T 5453-1997 “Textiles-Determination of Air Permeability of Fabrics”; the ultraviolet transmittance is tested according to HG / T 4735-2014 “Textile Dyeing and Finishing Chemicals-Ultraviolet Resistance Finishing Agent-Determination of Ultraviolet Resistance Performance”; the antibacterial performance of the sample is tested by selecting Staphylococcus aureus according to GB / T 20944.3-2008 “Evaluation of Antibacterial Performance of Textiles-Part 3: Oscillation Method”; the specific data are shown in Table 1.

[0049] Table 1: Performance test results of the fabric

[0050] In the examples, the modified jade powder is subjected to the modification steps of “pretreatment-sulfonation-silver loading-esterification”; in Comparative Example 1, the modification steps of the modified jade powder are changed to “pretreatment-sulfonation-esterification-silver loading”; in Comparative Example 2, the jade powder is subjected to the modification treatment of “pretreatment-sulfonation-silver loading”; in Comparative Example 3, the jade powder is subjected to the modification treatment of “pretreatment-silver loading-esterification”; in Comparative Example 4, the jade powder is only subjected to pretreatment of silane coupling agent; the experimental data show that whether the modification sequence is changed or some modification steps are omitted, the performance of the finally prepared fabric is lost to some extent compared with the examples.

[0051] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent substitution or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A lightweight moisture-conducting functional fabric, characterized in that: The invention comprises an inner layer and an outer layer. The inner layer is obtained by blending polyester fiber and nylon special-section fiber, and the outer layer is obtained by blending modified polypropylene fiber and hollow polyester fiber.

2. The lightweight moisture-conducting functional fabric according to claim 1, characterized in that: The modified polypropylene fiber is prepared by the following method steps: (1) Dispersing jade powder in an ethanol aqueous solution, adjusting the pH of the system, then adding 3-[3-carboxyallylamide]propyltriethoxysilane, and reflux reaction to obtain pretreated jade powder; (2) Dispersing the pretreated jade powder into deionized water, ultrasonically treating it, then adding potassium 3-sulfopropyl methacrylate, stirring to dissolve it, slowly adding potassium persulfate, and heating the reaction under a nitrogen atmosphere to obtain sulfonated jade powder; (3) Dispersing the sulfonated jade powder in deionized water, adding a silver nitrate aqueous solution in the dark, stirring and dispersing, and then slowly adding a newly prepared ascorbic acid aqueous solution under stirring. After the addition is complete, the reaction is carried out in the dark to obtain silver-loaded jade powder; (4) Dispersing the silver-loaded jade powder in DMF, adding UV-13 and 4-dimethylaminopyridine under nitrogen protection and stirring, cooling the system, and then adding dicyclohexylcarbodiimide, stirring and reacting to obtain modified jade powder; (5) Mix the polypropylene chips and modified jade powder, add them into a melt spinning machine for melt spinning, and stretch to obtain modified polypropylene fibers.

3. The lightweight moisture-conducting functional fabric according to claim 1, characterized in that: In step (1), the volume ratio of ethanol to deionized water in the ethanol-water solution is 85-95:5-15; the amount ratio of jade powder, ethanol-water solution, and 3-[3-carboxyallylamide]propyltriethoxysilane is 10 g:80-100 mL:0.5-3.5 g; the pH of the system is adjusted to 4-5 with glacial acetic acid; and the reflux reaction conditions are 65-80° C. for 3-7 h.

4. The lightweight moisture-conducting functional fabric according to claim 1, characterized in that: In step (2), the ratio of the pretreated jade powder, deionized water, potassium 3-sulfonate propyl methacrylate, and potassium persulfate is 10 g: 100-120 mL: 1-4 g: 0.01-0.1 g; the ultrasonic treatment is performed for 15-30 min; and the temperature reaction condition is to heat the reaction to 70-85° C. and react for 5-8 h.

5. The lightweight moisture-conducting functional fabric according to claim 1, characterized in that: In step (3), the dosage ratio of sulfonated jade powder, deionized water, silver nitrate aqueous solution, and ascorbic acid aqueous solution is 10 g: 80-100 mL: 10-20 mL: 5-10 mL; the concentration of the silver nitrate aqueous solution is 1-5 wt %; the concentration of the ascorbic acid aqueous solution is 4-10 wt %; and the reaction conditions are light-proof reaction at 25-35 ° C for 2-4 h.

6. The lightweight moisture-conducting functional fabric according to claim 1, characterized in that: In step (4), the amount ratio of silver-loaded jade powder, DMF, UV-13, 4-dimethylaminopyridine, and dicyclohexylcarbodiimide is 10 g: 80-100 mL: 1-4 g: 0.05-0.5 g: 0.5-1 g; the system is cooled to 0-5°C, and the stirring reaction conditions are 25-35°C and the stirring reaction is carried out for 18-36 hours.

7. The lightweight moisture-conducting functional fabric according to claim 1, characterized in that: In step (5), the usage ratio of polypropylene chips and modified jade powder is 100g:6~15g; the temperature of melt spinning is 260~280℃.

8. The lightweight moisture-conducting functional fabric according to claim 1, characterized in that: In step (1), the jade is subjected to ultrafine grinding to obtain jade powder with a particle size of 5 to 20 μm.

9. The lightweight moisture-conducting functional fabric according to claim 1, characterized in that: The nylon special-section fiber is prepared by the following method steps: nylon slices are placed in a screw extruder for melting, the discharge of the melt is controlled by a metering pump, and the nylon special-section fiber is spun through a special-shaped spinneret to produce the nylon special-section fiber; the special-shaped spinneret has a cross-shaped, Y-shaped, W-shaped or T-shaped special-section.

10. A method for preparing the lightweight moisture-conducting functional fabric according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: mixing polyester fiber and nylon special-section fiber in a ratio of 6-7:3-4 and spinning the mixture to make a blended yarn, and weaving the blended yarn into an inner layer through a loom; mixing modified polypropylene fiber and hollow polyester fiber in a ratio of 6-7:3-4 and spinning the mixture to make a blended yarn, and weaving the blended yarn into an outer layer through a loom; and connecting the inner layer and the outer layer through a knotting warp to obtain the lightweight moisture-conducting functional fabric.

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