Lightweight moisture-conducting functional fabric and preparation method thereof

Abstract

The application discloses a light-weight moisture-conducting functional fabric and a preparation method thereof, and relates to the technical field of textiles.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 cross-section fibers, and the outer layer is obtained by blending modified polypropylene fibers and hollow polyester fibers; the modified polypropylene fibers are obtained by melting and spinning the mixture of polypropylene chips and modified jade powder and then stretching; the prepared fabric not only has the characteristics of light weight and one-way moisture-conducting capability, can quickly discharge sweat outside the body, realizes dry and cool isolation between the skin and the outside world, and has multiple health protection functions such as persistent antibacterial property, efficient ultraviolet resistance and contact cool feeling.

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 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:

[0011] 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.

[0012] Preferably, the modified polypropylene fiber is prepared by the following method steps:

[0013] (1) dispersing the jade powder into an ethanol aqueous solution, adjusting the pH of the system, then adding 3-[3-carboxyallylamido]propyl triethoxysilane, refluxing, filtering, washing, and drying to obtain a pretreated jade powder;

[0014] The silane coupling agent is used to functionalize the surface of the jade powder: the main component of the jade powder is silicate, and the surface is rich in hydroxyl groups. In an acid-catalyzed ethanol aqueous solution, the ethoxyl groups (-OC2H5) in the 3-[3-carboxyallylamido]propyl triethoxysilane molecule are hydrolyzed into silanol groups (-Si-OH), which then undergoes dehydration condensation reaction with the hydroxyl groups on the surface of the jade powder to form a very stable and hydrolysis-resistant silicon-oxygen-silicon (-Si-O-Si-) covalent bond. 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.

[0015] Preferably, in step (1), the jade is subjected to ultrafine pulverization to obtain a jade powder with a particle size of 5-20 μm.

[0016] Preferably, in step (1), the volume ratio of ethanol to deionized water in the ethanol aqueous solution is 85-95:5-15; the amount ratio of the jade powder, the ethanol aqueous solution, and 3-[3-carboxyallylamido]propyl triethoxysilane 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 refluxing reaction conditions are refluxing at 65-80 °C for 3-7 h.

[0017] (2) dispersing the pretreated jade powder into deionized water, ultrasonic treatment, then adding 3-sulfopropyl methacrylate potassium, stirring to dissolve, slowly adding potassium persulfate, and heating under a nitrogen atmosphere to react, and then cooling, suction filtering, washing, and drying to obtain sulfonated jade powder;

[0018] The surface of the pretreated jade powder is subjected to free radical graft polymerization: in an aqueous solution, potassium persulfate is heated to decompose to generate sulfate radicals (SO4· - ), which are highly active radicals that can 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.

[0019] 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.

[0020] (3) dispersing the sulfonated jade powder into deionized water, adding silver nitrate aqueous solution under light protection, stirring and dispersing, then slowly adding newly prepared ascorbic acid aqueous solution under stirring, after dropwise addition, reacting under light protection, centrifuging, washing and drying the product to obtain silver-loaded jade powder;

[0021] The nanosilver is loaded on the surface of the powder: the second step of grafting has a large number of sulfonic acid anions (-SO3 - ) on the polymer chain, which has a strong cation capturing ability. When the silver nitrate solution is added, the positively charged silver ions (Ag + ) are adsorbed and enriched on the sulfonic acid sites on the surface of the powder by electrostatic attraction. The subsequently added ascorbic acid acts as a mild reducing agent to reduce the "anchored" silver ions in situ to uncharged zero-valent silver atoms. These silver atoms quickly aggregate into nanoscale particles, which are physically deposited and immobilized on the surface and near the polymer chain, thereby endowing the jade powder with excellent antibacterial properties.

[0022] Preferably, in step (3), the amount ratio of the 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 light protection reaction condition is 2-4 h of light protection reaction at 25-35℃.

[0023] (4) dispersing the silver-loaded jade powder into DMF, adding UV-13 and 4-dimethylaminopyridine under nitrogen protection and stirring, cooling the system, then adding dicyclohexyl carbodiimide, stirring and reacting, and then extracting, washing and drying the product to obtain modified jade powder;

[0024] The UV absorber molecules are covalently bonded to the surface of the powder: dicyclohexyl carbodiimide (DCC) first reacts with the carboxyl groups introduced in the first step to form a highly active intermediate. Under the synergistic action of the catalyst 4-dimethylaminopyridine (DMAP), the hydroxyl groups on the UV-13 molecule act as nucleophiles to attack the above-mentioned active intermediate to form a stable ester bond. Through this reaction, the UV-13 molecules are successfully bonded to the surface of the jade powder, endowing the final product with the function of absorbing ultraviolet rays.

[0025] Preferably, in step (4), the amount ratio of the silver-loaded jade powder, DMF, UV-13, 4-dimethylaminopyridine and dicyclohexyl carbodiimide 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℃, and the stirring reaction condition is 18-36 h of stirring reaction at 25-35℃.

[0026] (5) polypropylene chips, modified jade powder are mixed, and are added into a melt spinning machine to perform melt spinning, stretching, and modified polypropylene fibers are obtained;

[0027] Preferably, in step (5), the amount ratio of polypropylene chips and modified jade powder is 100g:6-15g; the temperature of melt spinning is 260-280 DEG C.

[0028] Preferably, the nylon profiled cross-section fiber is prepared by the following method steps: polyamide chips are put into a screw extruder to melt, the discharge amount of the melt is controlled through a metering pump, and the nylon profiled cross-section fiber is prepared through a profiled spinneret; the profiled spinneret has a cross-shaped or Y-shaped or W-shaped or T-shaped profiled cross-section.

[0029] The application also claims a preparation method of the light-weight moisture-conducting functional fabric, comprising the following steps: polyethylene fibers and nylon profiled cross-section fibers are mixed according to a ratio of 6-7:3-4, and then are spun to prepare blended yarn, and the blended yarn is woven into an inner layer through a weaving machine; modified polypropylene fibers and hollow polyester fibers are mixed according to a ratio of 6-7:3-4, and then are spun to prepare blended yarn, and the blended yarn is woven into an outer layer through a weaving machine; the inner layer and the outer layer are connected through binding warp, and the light-weight moisture-conducting functional fabric is obtained.

[0030] Compared with the prior art, the application has the following beneficial effects:

[0031] 1、The light-weight moisture-conducting functional fabric designed in the application realizes one-way moisture conductivity and wearing comfort through its unique double-layer structure. The nylon profiled cross-section fiber used in the inner layer can absorb sweat and moisture on the surface of the skin and efficiently transfer them through the capillary effect generated by the physical groove structure; the outer layer is mainly composed of modified polypropylene fibers, and the polypropylene matrix maintains high hydrophobicity, which can prevent external moisture from invading and internal moisture from back permeating; the modified jade powder uniformly dispersed in the fiber can rapidly capture and forcibly spread the moisture from the inner layer through the hydrophilic sites on the surface, greatly increasing the evaporation area. With the light weight and specific surface area advantages of the hollow polyester fiber, a high-efficiency moisture management system of "strongly dehumidifying in the inner layer and preventing back permeation and fast drying in the outer layer" is finally formed, which ensures that the human body is always dry.

[0032] 2、The application provides a modified jade powder preparation method, and the reaction sequence is the key to successful composite of multiple functions. The process first introduces "double bonds" for subsequent graft polymerization and "carboxyl groups" for final esterification through a silane coupling agent at one time; subsequently, the graft polymerization of sulfonate monomers is carried out by using the double bonds, and in this step, the strong hydrophilic groups are introduced while the carboxyl groups with weak activity are completely retained. The most critical step is as follows: by using the huge difference between the sulfonic acid group (strong acid) and the carboxyl group (weak acid) in acidity, the "selective anchoring" of silver ions is realized, that is, the silver ions will preferentially and firmly combine with the ionized sulfonate, and are in-situ reduced, which not only ensures the silver loading efficiency, but also perfectly avoids the consumption of the carboxyl group which is essential for the subsequent esterification reaction. The superiority of this sequence is that it avoids the fatal process defect of the "esterification first and silver loading later" scheme, that is, the product is hydrophobic and cannot be loaded with silver in water phase, and it is the best path to realize efficient bonding of all functional groups without interference.

[0033] 3、The application provides a modified jade powder. First, the micron-level particle size of the jade powder and its inherent specific heat capacity characteristics give the fiber an instantaneous and long-lasting cool feeling experience when it contacts 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 as a dispersing aid, they ensure the uniform distribution of the powder in the polypropylene melt; 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-acting and washable antibacterial and deodorant functions; finally, the UV-13 molecules stably connected by covalent bonds endow the fiber with excellent ultraviolet resistance, effectively shielding UVA and UVB. The synergistic effect of the four functions (cooling, moisture conductivity, antibacterial, and ultraviolet resistance) enables the functional fabric to achieve superior comprehensive performance. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present application clearer, the following combines embodiments to make the present application further detailed. Of course, the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0035] 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.

[0036] Hollow polyester fiber filament specification: DTY 75D / 72F;

[0037] Polyester fiber filament specification: DTY 75D / 144F;

[0038] The polypropylene chip is purchased from Luoyang Branch of China Petroleum Chemical Co., Ltd., and the model is PPH-Y35X.

[0039] A preparation method of a lightweight moisture-wicking functional fabric, comprising the following steps:

[0040] (1) The jade is subjected to ultrafine pulverization treatment to obtain a jade powder with a particle size of 5-20 μm. 10 g of the jade powder is dispersed in 80-100 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 85-95:5-15), and the pH of the system is adjusted to 4-5 by glacial acetic acid. Then, 0.5-3.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane is added, and reflux reaction is carried out at 65-80 °C for 3-7 h. The product is filtered, washed and dried to obtain a pretreated jade powder;

[0041] (2) 10 g of the pretreated jade powder is dispersed in 100-120 mL of deionized water, and ultrasonic treatment is carried out for 15-30 min. Then, 1-4 g of 3-sulfopropyl potassium methacrylate is added and dissolved by stirring. 0.01-0.1 g of potassium persulfate is slowly added, and the temperature is increased to 70-85 °C under a nitrogen atmosphere for reaction for 5-8 h. The product is cooled, suction filtered, washed and dried to obtain sulfonated jade powder;

[0042] (3) 10 g of the sulfonated jade powder is dispersed in 80-100 mL of deionized water, and 10-20 mL of a 1-5 wt% silver nitrate aqueous solution is added under light shielding. The mixture is dispersed by stirring, and then 5-10 mL of a freshly prepared 4-10 wt% ascorbic acid aqueous solution is slowly added under stirring. After the dropwise addition is completed, the product is reacted under light shielding at 25-35 °C for 2-4 h. The product is centrifuged, washed and dried to obtain silver-loaded jade powder;

[0043] (4) 10 g of the silver-loaded jade powder is dispersed in 80-100 mL of DMF, and 1-4 g of UV-13 and 0.05-0.5 g of 4-dimethylaminopyridine are added under stirring and nitrogen protection. The system is cooled to 0-5 °C, and then 0.5-1 g of dicyclohexyl carbodiimide is added. The product is stirred at 25-35 °C for reaction for 18-36 h. The product is suction filtered, washed and dried to obtain modified jade powder;

[0044] (5) 100 g of polypropylene chips and 6-15 g of the modified jade powder are mixed, and then fed into a melt spinning machine for melt spinning at 260-280 °C. The modified polypropylene fiber is obtained after stretching.

[0045] (6) Nylon chips are fed into a screw extruder for melting. 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 profiled spinneret. The profiled spinneret has a cross-shaped or Y-shaped or W-shaped or T-shaped profiled cross-section.

[0046] (7) polyester fibers, nylon profiled cross-section fibers are mixed in a ratio of 6-7:3-4, and then spun to form a blended yarn, the blended yarn is woven into an inner layer by a weaving machine; modified polypropylene fibers, hollow polyester fibers are mixed in a ratio of 6-7:3-4, and then spun to form 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.

[0047] The application will be further described below by means of specific examples.

[0048] Example 1

[0049] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps:

[0050] (1) jade is subjected to ultrafine pulverization treatment to obtain 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, and the product is filtered, washed and dried to obtain pretreated jade powder;

[0051] (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 increased to 85°C under a nitrogen atmosphere for reaction for 5 h, and the product is cooled, suction filtered, washed and dried to obtain sulfonated jade powder;

[0052] (3) 10 g of the sulfonated jade powder is dispersed in 90 mL of deionized water, 20 mL of a 3wt% silver nitrate aqueous solution is added under light shielding, and then dispersed by stirring, and then 10 mL of a freshly prepared 6wt% 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, and the product is centrifuged, washed and dried to obtain silver-loaded jade powder;

[0053] (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 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 modified jade powder;

[0054] (5) 100 g of polypropylene chips and 15 g of modified jade powder are mixed, and then added to a melt spinning machine for melt spinning at 270°C, and then stretched to obtain modified polypropylene fibers;

[0055] (6) The nylon chips are put into a screw extruder to melt, the output 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;

[0056] (7) The polyester fiber and the nylon profiled cross-section fiber are mixed at a ratio of 6:4, and then spun to prepare a 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, and then spun to prepare a 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.

[0057] Example 2

[0058] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps:

[0059] (1) The jade is subjected to ultrafine pulverization treatment to obtain 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 with 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, and the product is filtered, washed and dried to obtain pretreated jade powder;

[0060] (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-sulfonic acid propyl potassium methacrylate 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, and the product is cooled, suction filtered, washed and dried to obtain sulfonated jade powder;

[0061] (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 then dispersed by stirring, and 8 mL of a freshly prepared 6wt% ascorbic acid aqueous solution is slowly added under stirring, and after the dropwise addition is completed, reaction is carried out at 30°C for 3 h under light shielding, and the product is centrifuged, washed and dried to obtain silver-loaded jade powder;

[0062] (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 stirring and nitrogen protection, the system is cooled to 2°C, then 0.8 g of dicyclohexyl carbodiimide is added, and reaction is carried out at 30°C for 24 h under stirring, and the product is suction filtered, washed and dried to obtain modified jade powder;

[0063] (5) 100 g of polypropylene chips and 12 g of the modified jade powder are mixed, and then added to a melt spinning machine to be melt spun at 270°C, and stretched to obtain modified polypropylene fiber;

[0064] (6) melt the nylon chips in a screw extruder, control the output of the melt by a metering pump, and spin the melt through a Y-shaped profile spinneret to produce the nylon profiled cross-section fiber;

[0065] (7) mix the polyester fiber and the nylon profiled cross-section fiber in a ratio of 6:4, spin the mixture to produce a blended yarn, and weave the blended yarn into an inner layer; mix the modified polypropylene fiber and the hollow polyester fiber in a ratio of 6:4, spin the mixture to produce a blended yarn, and weave the blended yarn into an outer layer; connect the inner layer and the outer layer through a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0066] Example 3

[0067] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps:

[0068] (1) perform ultrafine pulverization treatment on jade to obtain jade powder with a particle size of 10-20 μm, disperse 10 g of the jade powder into 90 mL of an ethanol aqueous solution (a volume ratio of ethanol to deionized water is 95:5), adjust the pH of the system to 4.5 with glacial acetic acid, then add 1.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane, and reflux the system at 70°C for 5 h, filter, wash, and dry the product to obtain pretreated jade powder;

[0069] (2) disperse 10 g of the pretreated jade powder into 110 mL of deionized water, perform ultrasonic treatment for 20 min, then add 2 g of 3-sulfonic acid propyl potassium methacrylate, stir to dissolve, slowly add 0.04 g of potassium persulfate, heat the system to 75°C under a nitrogen atmosphere, and react for 6 h, cool the product, perform suction filtration, wash, and dry to obtain sulfonated jade powder;

[0070] (3) disperse 10 g of the sulfonated jade powder into 90 mL of deionized water, add 14 mL of a 3wt% silver nitrate aqueous solution under light shielding, stir and disperse, then slowly add 6 mL of a freshly prepared 6wt% ascorbic acid aqueous solution under stirring, react at 30°C for 3 h after the addition is completed, centrifuge, wash, and dry the product to obtain silver-loaded jade powder;

[0071] (4) disperse 10 g of the silver-loaded jade powder into 90 mL of DMF, add 2 g of UV-13 and 0.2 g of 4-dimethylaminopyridine under stirring and nitrogen protection, cool the system to 2°C, then add 0.7 g of dicyclohexyl carbodiimide, and stir the system at 30°C for 30 h, perform suction filtration, wash, and dry the product to obtain modified jade powder;

[0072] (5) 100 g polypropylene chips, 9 g modified jade powder are mixed and added to a melt spinning machine to melt spin at 270°C, stretch, and obtain modified polypropylene fibers;

[0073] (6) Nylon chips are put into a screw extruder to melt, the output 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;

[0074] (7) Polyester fibers and nylon profiled cross-section fibers are mixed at a ratio of 6:4 and then spun to prepare blended yarn, and the blended yarn is woven into an inner layer; modified polypropylene fibers and hollow polyester fibers are mixed at a ratio of 6:4 and then spun to prepare blended yarn, and the blended yarn is woven into an outer layer; the inner layer and the outer layer are connected by binding warp to obtain the lightweight moisture-conducting functional fabric.

[0075] Example 4

[0076] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps:

[0077] (1) Jade is subjected to ultrafine pulverization treatment to obtain 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 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, and the product is filtered, washed and dried to obtain pretreated jade powder;

[0078] (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-sulfonic acid propyl potassium methacrylate is added and dissolved by stirring, 0.01 g of potassium persulfate is slowly added, the temperature is raised to 70°C under a nitrogen atmosphere, and reaction is carried out for 8 h, and the product is cooled, suction filtered, washed and dried to obtain sulfonated jade powder;

[0079] (3) 10 g of the sulfonated jade powder is dispersed in 90 mL of deionized water, 10 mL of a 3wt% silver nitrate aqueous solution is added under light shielding, and stirring and dispersion are carried out, then 5 mL of a freshly prepared 6wt% ascorbic acid aqueous solution is slowly added under stirring, and after the dropwise addition is completed, reaction is carried out at 25°C under light shielding for 4 h, and the product is centrifuged, washed and dried to obtain silver-loaded jade powder;

[0080] (4) 10 g of the silver-loaded jade powder is dispersed in 90 mL of DMF, 1 g of UV-13 and 0.05 g of 4-dimethylaminopyridine are added under stirring and nitrogen protection, 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, and the product is suction filtered, washed and dried to obtain modified jade powder;

[0081] (5) 100 g of polypropylene chips and 6 g of modified jade powder are mixed and fed into a melt spinning machine to be melt spun at 270°C, and then stretched to obtain modified polypropylene fibers;

[0082] (6) Nylon chips are fed into a screw extruder to be melted, and the amount of the melt is controlled by a metering pump, and then the nylon profiled cross-section fibers are prepared by spinning through a Y-shaped profiled spinneret;

[0083] (7) The polyester fibers and the nylon profiled cross-section fibers are mixed at a ratio of 6:4 and then spun to prepare blended yarns, and the blended yarns are woven into an inner layer by a weaving machine; the modified polypropylene fibers and the hollow polyester fibers are mixed at a ratio of 6:4 and then spun to prepare blended yarns, and the blended yarns are 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.

[0084] Comparative Example 1

[0085] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps:

[0086] (1) Jade is subjected to ultrafine pulverization treatment to obtain 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-carboxyallyl amido] propyl triethoxysilane is added, and the system is refluxed at 80°C for 3 h, and then the product is filtered, washed and dried to obtain pretreated jade powder;

[0087] (2) 10 g of the pretreated jade powder is dispersed in 110 mL of deionized water, and then subjected to ultrasonic treatment for 20 min, 4 g of 3-sulfonic acid propyl potassium methacrylate is added and stirred to be dissolved, 0.1 g of potassium persulfate is slowly added, and the system is heated to 85°C under a nitrogen atmosphere and reacted for 5 h, and then the product is cooled, suction filtered, washed and dried to obtain sulfonated jade powder;

[0088] (3) 10 g of the sulfonated jade powder is dispersed in 90 mL of DMF, 4 g of UV-13 and 0.5 g of 4-dimethylamino pyridine are added under nitrogen protection and stirring, the system is cooled to 2°C, then 1 g of dicyclohexyl carbodiimide is added, and the system is stirred at 35°C for 18 h, and then the product is suction filtered, washed and dried to obtain esterified jade powder;

[0089] (4) 10 g of the esterified jade powder was dispersed in 90 mL of deionized water, 20 mL of a 3 wt% silver nitrate aqueous solution was added under light shielding, and then dispersed by stirring. Then, 10 mL of a freshly prepared 6 wt% ascorbic acid aqueous solution was slowly added under stirring, and after the dropwise addition was completed, the reaction was carried out at 35°C for 2 h under light shielding. The product was centrifuged, washed, and dried to obtain the modified jade powder;

[0090] (5) 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. The modified polypropylene fiber was obtained after stretching;

[0091] (6) The nylon chips were fed into a screw extruder to be melted. The amount of the melt was controlled by a metering pump, and the nylon profiled cross-section fiber was prepared by spinning through a Y-shaped profiled spinneret;

[0092] (7) The polyester fiber and the nylon profiled cross-section fiber were mixed at a ratio of 6:4 and then spun to form a blended yarn. The blended yarn was woven into an inner layer by a weaving machine. The modified polypropylene fiber and the hollow polyester fiber were mixed at a ratio of 6:4 and then spun to form a blended yarn. The blended yarn was woven into an outer layer by a weaving machine. The inner layer and the outer layer were connected by a binding warp to obtain the lightweight moisture-conducting functional fabric.

[0093] Comparative Example 2

[0094] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps:

[0095] (1) The jade was subjected to ultrafine pulverization treatment to obtain 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 glacial acetic acid, and then 3.5 g of 3-[3-carboxyallylamido]propyl triethoxysilane was added. The reaction was carried out at 80°C for 3 h. The product was filtered, washed, and dried to obtain the pretreated jade powder;

[0096] (2) 10 g of the pretreated jade powder was dispersed in 110 mL of deionized water and subjected to ultrasonic treatment for 20 min. Then, 4 g of 3-sulfopropyl potassium methacrylate was added and dissolved by stirring. 0.1 g of potassium persulfate was slowly added, and the reaction was carried out at 85°C for 5 h under a nitrogen atmosphere. The product was cooled, suction filtered, washed, and dried to obtain the sulfonated jade powder;

[0097] (3) 10 g of the sulfonated jade powder was dispersed in 90 mL of deionized water, and 20 mL of a 3 wt% silver nitrate aqueous solution was added under light shielding. The mixture was stirred and dispersed, and then 10 mL of a freshly prepared 6 wt% ascorbic acid aqueous solution was slowly added under stirring. After the dropwise addition was completed, the reaction was carried out at 35°C for 2 h under light shielding. The product was centrifuged, washed, and dried to obtain the silver-loaded jade powder.

[0098] (4) 100 g of polypropylene chips and 15 g of the silver-loaded jade powder are mixed, and then added into a melt spinning machine to be melt spun at 270°C, and stretched to obtain modified polypropylene fibers;

[0099] (5) The 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 fibers are prepared by spinning through a Y-shaped profiled spinneret;

[0100] (7) The polyester fibers and the nylon profiled cross-section fibers are mixed at a ratio of 6:4, and then spun to prepare blended yarns, and the blended yarns are woven into an inner layer by a weaving machine; the modified polypropylene fibers and the hollow polyester fibers are mixed at a ratio of 6:4, and then spun to prepare blended yarns, and the blended yarns are 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.

[0101] Comparative Example 3

[0102] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps:

[0103] (1) The jade is subjected to ultrafine pulverization treatment to obtain 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 the system is refluxed at 80°C for 3 h, and the product is filtered, washed, and dried to obtain pretreated jade powder;

[0104] (2) 10 g of the pretreated jade powder is dispersed in 90 mL of deionized water, 20 mL of a 3wt% silver nitrate aqueous solution is added under light shielding, and then stirred and dispersed, and then 10 mL of a freshly prepared 6wt% ascorbic acid aqueous solution is slowly added under stirring, and after the dropwise addition is completed, the system is reacted at 35°C for 2 h under light shielding, and then the product is centrifuged, washed, and dried to obtain silver-loaded jade powder;

[0105] (3) 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 nitrogen protection and stirring, the system is cooled to 2°C, then 1 g of dicyclohexyl carbodiimide is added, and the system is stirred at 35°C for 18 h, and then the product is suction filtered, washed, and dried to obtain modified jade powder;

[0106] (4) 100 g of polypropylene chips and 15 g of the modified jade powder are mixed, and then added into a melt spinning machine to be melt spun at 270°C, and stretched to obtain modified polypropylene fibers;

[0107] (5) The nylon chips are put into a screw extruder to melt, the output 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;

[0108] (6) The polyester fiber and the nylon profiled cross-section fiber 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. The modified polypropylene fiber and the hollow polyester fiber 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.

[0109] Comparative Example 4

[0110] A preparation method of a lightweight moisture-conducting functional fabric, comprising the following steps:

[0111] (1) The jade is subjected to ultrafine pulverization treatment to obtain 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 with glacial acetic acid, then 3.5 g of 3-[3-carboxyallyl amido] 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 pretreated jade powder;

[0112] (2) 100 g of polypropylene chips and 15 g of modified jade powder are mixed and added to a melt spinning machine to melt and spin at 270°C, and then stretched to obtain modified polypropylene fiber;

[0113] (3) The nylon chips are put into a screw extruder to melt, the output 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;

[0114] (4) The polyester fiber and the nylon profiled cross-section fiber 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. The modified polypropylene fiber and the hollow polyester fiber 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.

[0115] The fabric prepared by the examples 1-4 and the comparative examples 1-4 is subjected to performance testing, the fabric is detected for the cooling value at 5 min under the temperature (40±0.5) ℃ and the humidity (90±3) % according to the method reported in the paper of “Research on the testing method of heat dissipation functional fabric” published by Chen Fengmei in February 2012 on pages 135-137 of “China Textile Inspection”; the water absorption rate is tested according to 8.1 of GB / T 21655.1-2023 “Textiles - Evaluation of the moisture management performance - Part 1: single unit combination test method”; the air permeability is tested by using a fabric air permeability tester according to GB / T 5453-1997 “Textiles - Determination of the air permeability of fabrics”; the ultraviolet transmittance is tested according to HG / T 4735-2014 “Textile dyeing and finishing auxiliaries - Anti-ultraviolet finishing agent - Determination of anti-ultraviolet performance”; the antibacterial performance of the sample is tested by selecting Staphylococcus aureus according to GB / T 20944.3-2008 “Evaluation of the antibacterial performance of textiles - Part 3: oscillation method”; and the specific data is shown in Table 1.

[0116] Table 1: Fabric performance test results

[0117]

[0118] In the examples, the modified jade powder is subjected to the modification steps of “pretreatment-sulfonation-silver loading-esterification”; in the comparative example 1, the modification steps of the modified jade powder are changed to “pretreatment-sulfonation-esterification-silver loading”; in the comparative example 2, the jade powder is subjected to the modification treatment of “pretreatment-sulfonation-silver loading”; in the comparative example 3, the jade powder is subjected to the modification treatment of “pretreatment-silver loading-esterification”; and in the comparative example 4, the jade powder is only subjected to the pretreatment of silane coupling agent; the experimental data shows that whether the modification sequence is changed or some modification steps are omitted, the performance of the finally prepared fabric is lost to a certain extent compared with the examples.

[0119] The above only describes the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A lightweight, moisture-wicking functional fabric, characterized in that, It includes an inner layer and an outer layer, wherein the inner layer is made of a blend of polyester fiber and nylon profiled cross-section fiber, and the outer layer is made of a blend of modified polypropylene fiber and hollow polyester fiber; The modified polypropylene fiber was prepared by the following method steps: (1) Disperse jade powder into an ethanol aqueous solution, adjust the pH of the system, then add 3-[3-carboxyallylamido]propyltriethoxysilane, and reflux to obtain pretreated jade powder; (2) Disperse the pretreated jade powder into deionized water, sonicate it, then add potassium 3-sulfonopropyl methacrylate, stir to dissolve it, slowly add potassium persulfate, and heat the reaction under a nitrogen atmosphere to obtain sulfonated jade powder. (3) Disperse the sulfonated jade powder in deionized water, add silver nitrate aqueous solution under the protection of light, stir and disperse, and then slowly add freshly prepared ascorbic acid aqueous solution under stirring. After the addition is complete, react under the protection of light to obtain silver-loaded jade powder. (4) Disperse silver-loaded jade powder into DMF, add UV-13 and 4-dimethylaminopyridine under nitrogen protection and stirring, cool the system, then add dicyclohexylcarbodiimide, stir the reaction to obtain modified jade powder; (5) Mix polypropylene chips and modified jade powder, add them to a melt spinning machine for melt spinning and stretching to obtain modified polypropylene fibers; In step (1), the jade is subjected to ultra-fine grinding to obtain jade powder with a particle size of 5~20μm.

2. The lightweight moisture-wicking 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 ratio of jade powder, ethanol-water solution, and 3-[3-carboxyallylamamido]propyltriethoxysilane is 10g:80~100mL:0.5~3.5g; the pH of the system is adjusted to 4~5 with glacial acetic acid; the reflux reaction conditions are 65~80℃ for 3~7h.

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

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

5. The lightweight moisture-wicking functional fabric according to claim 1, characterized in that, In step (4), the ratio of silver-loaded jade powder, DMF, UV-13, 4-dimethylaminopyridine, and dicyclohexylcarbodiimide is 10g:80~100mL:1~4g:0.05~0.5g:0.5~1g; the system is cooled to 0~5℃, and the reaction is carried out at 25~35℃ for 18~36h.

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

7. The lightweight moisture-wicking functional fabric according to claim 1, characterized in that, The nylon shaped cross-section fiber is prepared by the following steps: nylon chips are melted in a screw extruder, the output of the melt is controlled by a metering pump, and the nylon shaped cross-section fiber is obtained by being spun through a shaped spinneret; the shaped spinneret has a cross-shaped, Y-shaped, W-shaped, or T-shaped cross-section.

8. A method for preparing a lightweight moisture-wicking functional fabric as described in any one of claims 1 to 7, characterized in that, The process includes the following steps: mixing polyester fiber and nylon profiled cross-section fiber in a ratio of 6~7:3~4 and spinning the mixture to form a blended yarn; weaving the blended yarn into an inner layer using 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; weaving the blended yarn into an outer layer using a loom; and connecting the inner and outer layers with a splicing wire to obtain the lightweight moisture-wicking functional fabric.

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