Bamboo wool high-elastic cloud-feeling cotton and preparation process thereof

Abstract

The invention belongs to the technical field of functional fiber fabric preparation, and particularly relates to bamboo wool high-elastic cloud-feeling cotton and a preparation process thereof.The preparation process comprises the following steps that S1, modified bamboo wool, modified polyester fibers and low-melting-point polyester fibers are mixed, stirred, opened and carded into a net according to the mass ratio of (2-4): (4-6): (1-3), and a fiber net is obtained; s2, the fiber net is subjected to pre-needling and main needling, and a semi-finished product is obtained; the semi-finished product is subjected to hot melting shaping, cutting and packaging, and the bamboo wool high-elasticity cloud-feeling cotton is obtained. The prepared bamboo wool high-elasticity cloud-feeling cotton is comfortable, healthy, natural and environment-friendly, has excellent moisture absorption and air permeability, strong antibacterial property and high rebound resilience, is simple in preparation process and easy for large-scale production, and can be widely applied to the fields of mattresses, sofas, elastic protection and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of functional fiber fabric preparation, and particularly relates to a bamboo velvet high-elastic cloud-feel cotton and a preparation process thereof. Background Art

[0002] As people's quality of life continues to improve, higher requirements are placed on the comfort and environmental performance of various daily necessities. In the field of textile materials, traditional cotton materials have exposed many limitations. For example, ordinary cotton, although natural and environmentally friendly, is not elastic enough and can hardly meet people's demand for highly elastic, soft and special tactile materials. Some synthetic fiber materials have good elasticity but poor air permeability. Bamboo velvet, as a natural cellulose fiber, has the advantages of good air permeability, hygroscopicity and antibacterial properties. However, it is difficult to prepare a material with high elasticity and special touch using bamboo velvet alone. Therefore, it is of great practical significance to develop a new material that combines bamboo velvet with polyester fiber to prepare a high elasticity, good air permeability and environmental protection. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a highly elastic, breathable and environmentally friendly bamboo velvet high-elastic cloud-feel cotton and a preparation process thereof.

[0004] To solve the above problems, the technical solution adopted in the present invention is: A preparation process of bamboo velvet high-elastic cloud-feel cotton comprises the following steps: S1, mixing modified bamboo velvet, modified polyester fiber and low melting point polyester fiber in a mass ratio of 2-4:4-6:1-3, stirring, opening and combing into a web to obtain a fiber web; S2, pre-puncturing and main-puncturing the fiber web to obtain a semi-finished product; hot-melt shaping, cutting and packaging the semi-finished product to obtain bamboo velvet high-elastic cloud-feel cotton.

[0005] Preferably, the modified bamboo wool is prepared by the following method: Mix lavender, chrysanthemum, camphor wood and phellodendron in a mass ratio of 2-3:1-1.5:0.3-0.5:0.2-0.4, grind into a mixed powder of 100-150 mesh, add an extractant 5-8 times the mass of the mixed powder, mix and stir, heat and soak for 8-12 hours, centrifuge, and collect the filtrate; Adding bamboo wool to the filtrate, the weight of the bamboo wool is 10-25% of the weight of the filtrate, heating and soaking for 1-2 hours, filtering, and drying to obtain pretreated bamboo wool; Mix 4-hydroxy-3-methoxycinnamic acid and anhydrous ethanol in a mass ratio of 2-6:74-80, add p-toluenesulfonic acid, stir for 5-8 minutes, add pretreated bamboo wool, stir for 2-4 hours, filter, wash and dry to obtain modified bamboo wool.

[0006] Preferably, the extractant is prepared by mixing anhydrous ethanol and methyl trioctyl ammonium chloride in a mass ratio of 1-2:0.5-0.8.

[0007] Preferably, the modified polyester fiber is prepared by the following method: The functionalized polyester fiber is mixed with dimethylformamide, stirred for 5-8 minutes, modified medical stone is added, stirred for 10-20 minutes, sodium carbonate is added, stirred for 8-12 minutes, heated to 80-100°C, stirred for 6-8 hours, cooled to room temperature, filtered, washed, and dried to obtain the modified polyester fiber; wherein the mass ratio of the functionalized polyester fiber, dimethylformamide, modified medical stone and sodium carbonate is 3-5:60-70:1-3:0.1-0.2.

[0008] Preferably, the functionalized polyester fiber is prepared by the following method: A1. Mix citric acid and deionized water in a mass ratio of 10-25:62-90, stir for 8-10 min, add a catalyst of 4-6% by mass of citric acid and an antioxidant of 0.5-1% by mass of citric acid, stir for 5-8 min, and obtain a citric acid solution; A2, mixing high elastic polyester fiber and citric acid solution in a mass ratio of 3-5:35-50, heating and stirring for 3-6 hours, filtering, washing, and drying to obtain carboxylated polyester fiber; A3. Weigh carboxylated polyester fiber, epichlorohydrin, 3-mercapto-1,2-propylene glycol and deionized water in a mass ratio of 2-5:0.5-2:0.5-1:25-35, mix the carboxylated polyester fiber and deionized water, ultrasonically disperse for 10-15 minutes, then add epichlorohydrin and 3-mercapto-1,2-propylene glycol, stir for 15-20 minutes, adjust the pH, heat and stir for 3-5 hours, filter, wash and dry to obtain functionalized polyester fiber.

[0009] Preferably, the modified medical stone is prepared by the following method: B1, grind medical stone into fine powder of 200-300 mesh, disperse the medical stone fine powder in toluene, add maleic anhydride, stir for 5-10 minutes, then add benzoyl peroxide, stir for 10-15 minutes, heat for 3-4 hours, filter, wash, and dry to obtain intermediate 1; B2, dispersing intermediate 1 in ethanol, ultrasonically dispersing for 8-15 minutes, adding sodium 4-mercaptobutanesulfonate and benzoin dimethyl ether, stirring for 10-15 minutes, then irradiating with ultraviolet light under nitrogen, stirring while irradiating, filtering, washing, and drying to obtain intermediate 2; B3. Disperse intermediate 2 in dimethylformamide, stir for 5-7 minutes, add propylenediamine, stir for 10-15 minutes, then add 4-dimethylaminopyridine, heat and stir for 6-8 hours, filter, wash and dry to obtain modified medical stone.

[0010] Preferably, in step B1, the mass ratio of medical stone powder, toluene, maleic anhydride and benzoyl peroxide is 5-8:50-60:1-2:0.1-0.2.

[0011] Preferably, in step B2, the mass ratio of intermediate 1, ethanol, sodium 4-mercaptobutanesulfonate and anthracene dimethyl ether is 3-5:40-50:0.5-0.8:0.01-0.02.

[0012] Preferably, in step B3, the mass ratio of intermediate 2, dimethylformamide, propylenediamine and 4-dimethylaminopyridine is 2-4:45-55:0.5-0.7:0.01-0.02.

[0013] A bamboo velvet high-elastic cloud-feel cotton is prepared by the preparation process.

[0014] In summary, the present invention has the following beneficial effects: The present invention first grinds lavender, chrysanthemum, camphor wood and phellodendron into mixed powder, obtains an extract through an extraction process and collects a filtrate. Then, bamboo wool is placed in the filtrate and soaked to obtain pretreated bamboo wool. In this process, effective ingredients such as flavonoids, alkaloids, terpenoid compounds in the mixed powder will dissolve into the filtrate during heating and soaking. These ingredients adhere to the surface of the bamboo wool or penetrate into the inside thereof in the form of physical adsorption or weak chemical bonding, giving the bamboo wool better antibacterial ability, while also making it have a natural insect repellent effect, which can effectively reduce microbial breeding and mosquito infestation. In addition, volatile components such as linalyl acetate contained in the mixed powder can act on the human nervous system, relieve anxiety and improve sleep quality. Subsequently, 4-hydroxy-3-methoxycinnamic acid is mixed with the pretreated bamboo wool to obtain modified bamboo wool, which can form a protective film on the surface of the bamboo wool, and this protective film can enhance the wear resistance and heat resistance of the bamboo wool, thereby extending the service life of the bamboo wool.

[0015] The present invention first mixes high-elastic polyester fiber with citric acid solution to successfully prepare carboxylated polyester fiber. Subsequently, the carboxylated polyester fiber is mixed with epichlorohydrin and 3-mercapto-1,2-propylene glycol to react, and finally obtains functionalized polyester fiber. In this process, the introduction of chlorine element optimizes the internal structure and surface properties of the functionalized polyester fiber. On the basis of maintaining high elasticity, its flexibility is further improved, which not only brings better comfort, but also greatly enhances durability and is not prone to deformation and breakage; epichlorohydrin cross-links with the polyester fiber molecular chain to form a three-dimensional network structure, thereby enhancing mechanical properties and heat resistance; the introduction of 3-mercapto-1,2-propylene glycol further improves the antibacterial properties of the functionalized polyester fiber, and the introduction of mercapto groups enables the polyester fiber molecular chains to move more freely within the framework of the cross-linked network. The two work together to achieve a better balance between the properties of the polyester fiber such as flexibility and strength.

[0016] The invention firstly makes medical stone and maleic anhydride carry out grafting reaction, introduces anhydride groups into the surface of medical stone, and obtains intermediate 1. Then, intermediate 1 is reacted with sodium 4-mercaptobutanesulfonate, introduces sulfonic acid groups into the surface of medical stone, and generates intermediate 2. Intermediate 2 reacts with propylenediamine, and amino groups are introduced into the surface of medical stone, thereby preparing modified medical stone. Sulfonic acid groups, amino groups and other polar functional groups are introduced into the surface of medical stone, and the hydrophilicity of modified medical stone is enhanced, thereby significantly improving the hygroscopicity of polyester fiber. Moreover, the surface structure and chemical properties of the modified medical stone are changed, more micropores and mesoporous structures are formed, the specific surface area is increased, thereby improving the adsorption capacity of odor molecules.

[0017] The invention mixes functionalized polyester fiber with modified medical stone, and obtains modified polyester fiber under the action of sodium carbonate. The active groups of the functionalized polyester fiber and the active groups on the surface of the modified medical stone, such as amino groups, are connected together through chemical bonds to form an organic-inorganic hybrid material system, wherein the medical stone plays a role in reinforcing the skeleton, and its presence significantly improves the overall strength, modulus and wear resistance of the modified polyester fiber, making it difficult to deform and damage when subjected to external force; the medical stone has good thermal stability, and after being grafted with the polyester fiber, it can increase the thermal decomposition temperature of the polyester fiber to a certain extent, reduce the degradation and aging of the polyester fiber at high temperature, and extend the service life of the material; at the same time, the micropores on the surface of the medical stone can provide a larger specific surface area, and enhance the adsorption capacity of water molecules; the mesopores are conducive to the diffusion and transmission of water; after the functionalized polyester fiber is grafted with the modified medical stone, a kind of interwoven network structure is formed, and this structure not only increases the porosity inside the material, but also forms complex channels. Air and moisture can flow freely in these channels, thereby improving the air permeability and moisture absorption and dehumidification capacity of the material. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with specific embodiments, but the embodiments do not limit the present invention in any form.

[0019] 4080 low-melting point polyester fiber, purchased from Nantong Luolai Chemical Fiber Co., Ltd., model: 4DX51MM low melting point, thickness: 4D; medical stone, purchased from Lingshou County Yiran Mineral Products Processing Factory, item number yr-4001; high-elastic polyester fiber, purchased from Huzhou Xucai High-tech Fiber Co., Ltd., thickness: 3D, length: 65mm; lavender, purchased from Jiangsu Keqing Landscaping Co., Ltd., plant height: 20cm; chrysanthemum, purchased from Bozhou Renyi Chinese Medicine Sales Co., Ltd.; camphor wood, purchased from Shanghai Ronghong Wood Industry Co., Ltd.; Phellodendron, purchased from Bozhou Sansongtang Pharmaceutical Co., Ltd.

[0020] Bamboo velvet is made by the following method: The bamboo was split into 5 cm wide bamboo strips, soaked in clean water for 24 hours, and then placed in a roller press for 5 minutes. The rolled bamboo strips were soaked in a 3% by mass sodium hydroxide solution, heated to 80°C, stirred at 100 rpm for 3 hours, washed with clean water until neutral, and then soaked in a 2% by mass dilute acetic acid for 10 minutes. Subsequently, the soaked bamboo strips were passed through a high-speed beater with a controlled speed of 3000 rpm for 5 minutes, dried at 50°C for 3 hours, and processed by a carding machine to obtain bamboo fluff; wherein, the mass ratio of the rolled bamboo strips to the sodium hydroxide solution was 1:25, and the mass ratio of the washed bamboo strips to the dilute acetic acid was 1:15.

[0021] Example 1 A preparation process of bamboo velvet high-elastic cloud-feel cotton comprises the following steps: S1, the modified bamboo velvet, the modified polyester fiber and the 4080 low melting point polyester fiber are mixed in a mass ratio of 2:4:1, stirred at 60 rpm for 15 min, and then sent to an opener, the opening speed is controlled to be 800 rpm, the opening time is 5 min, and a mixed fiber is prepared; the mixed fiber is sent to a carding machine for carding, the working roller line speed is 200 rpm, the doffer speed is 15 rpm, the cylinder speed is 400 rpm, and the carding time is 25 min to obtain a fiber web; S2. The fiber web is transported to the pre-needling machine and the pre-needling density is controlled to be 150 needles / cm 2 The upper and lower acupuncture depths are both 5 mm, and the main acupuncture density is 400 punctures / cm 2 The needling depth is 8 mm, and the needling time is controlled within 30 min to obtain a semi-finished product; the semi-finished product is placed at 180°C for hot melt shaping, and the time is controlled within 10 min. The semi-finished product is cut and packaged to obtain bamboo velvet high-elastic cloud-feel cotton.

[0022] Wherein, modified bamboo velvet is prepared by the following method: Mix lavender, chrysanthemum, camphor wood and phellodendron in a mass ratio of 2:1:0.3:0.2, grind into a mixed powder of 100 mesh, add an extractant 5 times the mass of the mixed powder, mix and stir, stir at 100 rpm for 10 minutes, soak at 45°C for 8 hours, centrifuge at 8000 rpm for 2 minutes, and collect the filtrate; wherein the extractant is prepared by mixing anhydrous ethanol and methyl trioctyl ammonium chloride in a mass ratio of 1:0.5; The bamboo wool is completely immersed in the filtrate, the weight of the bamboo wool is 10% of the weight of the filtrate, immersed at 50°C for 1 hour, filtered, and dried at 65°C for 3 hours to obtain pretreated bamboo wool; Mix 4-hydroxy-3-methoxycinnamic acid and anhydrous ethanol in a mass ratio of 2:74, add p-toluenesulfonic acid (3% by mass of 4-hydroxy-3-methoxycinnamic acid), stir at 100 rpm for 5 min, add pretreated bamboo wool, stir at 45 ° C for 2 h, and the stirring rate is 80 rpm. Filter, wash 3 times with deionized water, and dry at 65 ° C for 4 h to obtain modified bamboo wool, wherein the mass ratio of pretreated bamboo wool to 4-hydroxy-3-methoxycinnamic acid is 2:1.

[0023] Wherein, modified polyester fiber is prepared by the following method: The functionalized polyester fiber was mixed with dimethylformamide, stirred at 60 rpm for 5 min, modified medical stone was added, stirred at 100 rpm for 10 min, sodium carbonate was added, stirred at 60 rpm for 8 min, heated to 80°C, stirred at 150 rpm for 6 h, and after cooling to room temperature, filtered, washed with ethanol for 3 times, and dried at 70°C for 8 h to obtain modified polyester fiber; wherein the mass ratio of the functionalized polyester fiber, dimethylformamide, modified medical stone and sodium carbonate was 3:60:1:0.1.

[0024] Wherein, functionalized polyester fiber is prepared by the following method: A1. Mix citric acid and deionized water in a mass ratio of 10:62, stir at 60 rpm for 8 min, add a catalyst of 4% by mass of citric acid and an antioxidant of 0.5% by mass of citric acid, and stir for 5 min to obtain a citric acid solution; wherein the catalyst is sodium bisulfate and the antioxidant is 2,6-di-tert-butyl-4-methylphenol; A2, mixing high elastic polyester fiber and citric acid solution in a mass ratio of 3:35, controlling the stirring rate to 150 rpm, stirring at 120° C. for 3 h, filtering, washing with deionized water 3 times, and drying at 60° C. for 4 h to obtain carboxylated polyester fiber; A3. Weigh carboxylated polyester fiber, epichlorohydrin, 3-mercapto-1,2-propylene glycol and deionized water in a mass ratio of 2:0.5:0.5:25, mix the carboxylated polyester fiber and deionized water, ultrasonically disperse at 20 kHz for 10 min, add epichlorohydrin and 3-mercapto-1,2-propylene glycol, stir for 15 min, control the stirring rate to 100 rpm, adjust the pH to 9, heat to 50°C, stir for 3 h, filter, wash 3 times with deionized water, and dry at 60°C for 4 h to obtain functionalized polyester fiber.

[0025] Wherein, modified medical stone is prepared by the following method: B1, grinding medical stone into a fine powder of 200 mesh, dispersing the medical stone fine powder in toluene, adding maleic anhydride, stirring at 100 rpm for 5 min, then adding benzoyl peroxide, stirring at 60 rpm for 10 min, heating at 80 ° C for 3 h, controlling the stirring rate to 80 rpm, filtering, washing with deionized water 3 times, and drying at 60 ° C for 3 h to obtain intermediate 1; wherein the mass ratio of medical stone fine powder, toluene, maleic anhydride and benzoyl peroxide is 5:50:1:0.1; B2. Disperse intermediate 1 in ethanol, disperse by ultrasonic at 20 kHz for 8 min, add sodium 4-mercaptobutanesulfonate and benzoin dimethyl ether, stir at 100 rpm for 10 min, and then irradiate with ultraviolet light under nitrogen with an intensity of 8 mW / cm 2 , the illumination time is 1h, stirring is performed while irradiating, the stirring rate is controlled to be 100rpm, filtering, washing with deionized water 3 times, and drying at 60°C for 3h to obtain intermediate 2; wherein the mass ratio of intermediate 1, ethanol, sodium 4-mercaptobutanesulfonate and anthracene dimethyl ether is 3:40:0.5:0.01; B3. Disperse intermediate 2 in dimethylformamide, stir at 100 rpm for 5 min, add propylenediamine, stir at 80 rpm for 15 min, then add 4-dimethylaminopyridine, heat to 65 ° C, stir at 100 rpm for 6 h, filter, wash 3 times with anhydrous ethanol, and dry at 70 ° C for 5 h to obtain modified medical stone; wherein the mass ratio of intermediate 2, dimethylformamide, propylenediamine and 4-dimethylaminopyridine is 2:45:0.5:0.01.

[0026] Example 2 A preparation process of bamboo velvet high-elastic cloud-feel cotton comprises the following steps: S1, the modified bamboo velvet, the modified polyester fiber and the 4080 low melting point polyester fiber are mixed in a mass ratio of 4:6:3, stirred at 100 rpm for 25 min, and then sent to an opener, the opening speed is controlled to be 1000 rpm, the opening time is 9 min, and a mixed fiber is prepared; the mixed fiber is sent to a carding machine for carding, the working roller linear speed is 300 rpm, the doffer speed is 25 rpm, the cylinder speed is 500 rpm, and the carding time is 30 min to obtain a fiber web; S2. The fiber web is transported to the pre-needling machine and the pre-needling density is controlled to be 180 needles / cm 2 The upper and lower acupuncture depths are both 10 mm, and the main acupuncture density is 450 punctures / cm 2 The needling depth is 10 mm, and the needling time is controlled within 30 min to obtain a semi-finished product; the semi-finished product is placed at 180°C for hot melt shaping, and the time is controlled within 15 min. The semi-finished product is cut and packaged to obtain bamboo velvet high-elastic cloud-feel cotton.

[0027] Wherein, modified bamboo velvet is prepared by the following method: Mix lavender, chrysanthemum, camphor wood and phellodendron in a mass ratio of 3:1.5:0.5:0.4, grind into a mixed powder of 150 mesh, add an extractant 8 times the mass of the mixed powder, mix and stir, stir at 200 rpm for 20 minutes, soak at 65°C for 12 hours, centrifuge at 10000 rpm for 3 minutes, and collect the filtrate; wherein the extractant is prepared by mixing anhydrous ethanol and methyl trioctyl ammonium chloride in a mass ratio of 2:0.8; The bamboo wool is completely immersed in the filtrate, the weight of the bamboo wool is 25% of the weight of the filtrate, immersed at 65°C for 2 hours, filtered, and dried at 80°C for 4 hours to obtain pretreated bamboo wool; Mix 4-hydroxy-3-methoxycinnamic acid and anhydrous ethanol in a mass ratio of 6:80, add p-toluenesulfonic acid with a mass ratio of 6% of 4-hydroxy-3-methoxycinnamic acid, stir at 150 rpm for 8 min, add pretreated bamboo wool, stir at 65 ° C for 4 h, and the stirring rate is 120 rpm. Filter, wash with deionized water 5 times, and dry at 80 ° C for 6 h to obtain modified bamboo wool, wherein the mass ratio of pretreated bamboo wool to 4-hydroxy-3-methoxycinnamic acid is 2:1.

[0028] Wherein, modified polyester fiber is prepared by the following method: The functionalized polyester fiber was mixed with dimethylformamide, stirred at 100 rpm for 8 min, modified medical stone was added, stirred at 200 rpm for 20 min, sodium carbonate was added, stirred at 80 rpm for 12 min, heated to 100°C, stirred at 200 rpm for 8 h, cooled to room temperature, filtered, washed with ethanol 3 times, and dried at 90°C for 12 h to obtain modified polyester fiber; wherein the mass ratio of the functionalized polyester fiber, dimethylformamide, modified medical stone and sodium carbonate was 5:70:3:0.2.

[0029] Wherein, functionalized polyester fiber is prepared by the following method: A1. Mix citric acid and deionized water in a mass ratio of 25:90, stir at 80 rpm for 10 min, add a catalyst of 6% by mass of citric acid and an antioxidant of 1% by mass of citric acid, and stir for 8 min to obtain a citric acid solution; wherein the catalyst is sodium bisulfate and the antioxidant is 2,6-di-tert-butyl-4-methylphenol; A2, mixing high elastic polyester fiber and citric acid solution in a mass ratio of 5:50, controlling the stirring rate to 300 rpm, stirring at 130° C. for 6 h, filtering, washing with deionized water 3 times, and drying at 80° C. for 5 h to obtain carboxylated polyester fiber; A3. Weigh carboxylated polyester fiber, epichlorohydrin, 3-mercapto-1,2-propylene glycol and deionized water in a mass ratio of 5:2:1:35, mix the carboxylated polyester fiber and deionized water, ultrasonically disperse at 30 kHz for 15 minutes, then add epichlorohydrin and 3-mercapto-1,2-propylene glycol, stir for 20 minutes, control the stirring rate to 100-150 rpm, adjust the pH to 10, heat to 70°C, stir for 5 hours, filter, wash with deionized water 5 times, and dry at 80°C for 6 hours to obtain functionalized polyester fiber.

[0030] Wherein, modified medical stone is prepared by the following method: B1, grinding medical stone into 300 mesh fine powder, dispersing the medical stone fine powder in toluene, adding maleic anhydride, stirring at 200 rpm for 10 min, then adding benzoyl peroxide, stirring at 80 rpm for 15 min, heating at 100 ° C for 4 h, controlling the stirring rate to 120 rpm, filtering, washing with deionized water 3 times, and drying at 80 ° C for 5 h to obtain intermediate 1; wherein the mass ratio of medical stone fine powder, toluene, maleic anhydride and benzoyl peroxide is 8:60:2:0.2; B2. Disperse intermediate 1 in ethanol, perform ultrasonic dispersion at 30 kHz for 15 min, add sodium 4-mercaptobutanesulfonate and benzoin dimethyl ether, stir at 200 rpm for 15 min, and then irradiate with ultraviolet light under nitrogen at an intensity of 15 mW / cm 2, the illumination time is 2h, stirring is performed while irradiating, the stirring rate is controlled to be 200rpm, filtering, washing with deionized water 3 times, and drying at 80°C for 5h to obtain intermediate 2; wherein the mass ratio of intermediate 1, ethanol, sodium 4-mercaptobutanesulfonate and anthracene dimethyl ether is 5:50:0.8:0.02; B3. Disperse intermediate 2 in dimethylformamide, stir at 150 rpm for 5-7 min, add propylenediamine, stir at 100 rpm for 15 min, then add 4-dimethylaminopyridine, heat to 85 ° C, stir at 200 rpm for 8 h, filter, wash 3 times with anhydrous ethanol, and dry at 90 ° C for 7 h to obtain modified medical stone; wherein the mass ratio of intermediate 2, dimethylformamide, propylenediamine and 4-dimethylaminopyridine is 4:55:0.7:0.02.

[0031] Example 3 A preparation process of bamboo velvet high-elastic cloud-feel cotton comprises the following steps: S1, the modified bamboo velvet, the modified polyester fiber and the 4080 low melting point polyester fiber are mixed in a mass ratio of 3:5:2, stirred at 80 rpm for 20 min, and then sent to an opener, the opening speed is controlled to be 900 rpm, the opening time is 7 min, and a mixed fiber is prepared; the mixed fiber is sent to a carding machine for carding, the working roller linear speed is 250 rpm, the doffer speed is 20 rpm, the cylinder speed is 450 rpm, and the carding time is 28 min to obtain a fiber web; S2. The fiber web is transported to the pre-needling machine and the pre-needling density is controlled to be 170 needles / cm 2 The upper and lower acupuncture depths are both 8 mm, and the main acupuncture density is 420 punctures / cm 2 The needling depth is 9 mm, and the needling time is controlled within 30 min to obtain a semi-finished product; the semi-finished product is placed at 180°C for hot melt shaping, and the time is controlled within 12 min. The semi-finished product is cut and packaged to obtain bamboo velvet high-elastic cloud-feel cotton.

[0032] Wherein, modified bamboo velvet is prepared by the following method: Mix lavender, chrysanthemum, camphor wood and phellodendron in a mass ratio of 2.5:1.3:0.4:0.3, grind into a mixed powder of 130 mesh, add an extractant 7 times the mass of the mixed powder, mix and stir, stir at 150 rpm for 15 minutes, soak at 50°C for 10 hours, centrifuge at 9000 rpm for 2.5 minutes, and collect the filtrate; wherein the extractant is prepared by mixing anhydrous ethanol and methyl trioctyl ammonium chloride in a mass ratio of 1.5:0.7; The bamboo wool was completely immersed in the filtrate, the weight of the bamboo wool was 18% of the weight of the filtrate, immersed at 58°C for 1.5 hours, filtered, and dried at 75°C for 3.5 hours to obtain the pretreated bamboo wool; Mix 4-hydroxy-3-methoxycinnamic acid and anhydrous ethanol in a mass ratio of 4:78, add p-toluenesulfonic acid (4% by mass of 4-hydroxy-3-methoxycinnamic acid), stir at 130 rpm for 7 min, add pretreated bamboo wool, stir at 55 ° C for 3 h, the stirring rate is 100 rpm, filter, wash 4 times with deionized water, and dry at 75 ° C for 5 h to obtain modified bamboo wool, wherein the mass ratio of pretreated bamboo wool to 4-hydroxy-3-methoxycinnamic acid is 2:1.

[0033] Wherein, modified polyester fiber is prepared by the following method: The functionalized polyester fiber was mixed with dimethylformamide, stirred at 80 rpm for 7 min, modified medical stone was added, stirred at 150 rpm for 15 min, sodium carbonate was added, stirred at 70 rpm for 10 min, heated to 90°C, stirred at 180 rpm for 7 h, cooled to room temperature, filtered, washed with ethanol 3 times, and dried at 80°C for 10 h to obtain the modified polyester fiber; wherein the mass ratio of the functionalized polyester fiber, dimethylformamide, modified medical stone and sodium carbonate was 4:65:2:0.15.

[0034] Wherein, functionalized polyester fiber is prepared by the following method: A1. Mix citric acid and deionized water in a mass ratio of 18:76, stir at 70 rpm for 9 min, add a catalyst of 5% by mass of citric acid and an antioxidant of 0.8% by mass of citric acid, and stir for 7 min to obtain a citric acid solution; wherein the catalyst is sodium bisulfate and the antioxidant is 2,6-di-tert-butyl-4-methylphenol; A2, mixing high elastic polyester fiber and citric acid solution in a mass ratio of 4:45, controlling the stirring rate to 230 rpm, stirring at 125° C. for 5 h, filtering, washing with deionized water 3 times, and drying at 70° C. for 4.5 h to obtain carboxylated polyester fiber; A3. Weigh carboxylated polyester fiber, epichlorohydrin, 3-mercapto-1,2-propylene glycol and deionized water in a mass ratio of 3:1:0.8:30, mix the carboxylated polyester fiber and deionized water, ultrasonically disperse at 25 kHz for 12 minutes, then add epichlorohydrin and 3-mercapto-1,2-propylene glycol, stir for 18 minutes, control the stirring rate to 130 rpm, adjust the pH to 10, heat to 60°C, stir for 4 hours, filter, wash 4 times with deionized water, and dry at 70°C for 5 hours to obtain functionalized polyester fiber.

[0035] Wherein, modified medical stone is prepared by the following method: B1, grinding medical stone into a fine powder of 260 mesh, dispersing the medical stone fine powder in toluene, adding maleic anhydride, stirring at 150rpm for 8min, then adding benzoyl peroxide, stirring at 70rpm for 13min, heating at 90°C for 3.5h, controlling the stirring speed to 100rpm, filtering, washing with deionized water 3 times, and drying at 70°C for 4h to obtain intermediate 1; wherein the mass ratio of medical stone fine powder, toluene, maleic anhydride and benzoyl peroxide is 7:55:1.5:0.15; B2. Disperse intermediate 1 in ethanol, disperse ultrasonically at 25 kHz for 12 min, add sodium 4-mercaptobutanesulfonate and benzoin dimethyl ether, stir at 150 rpm for 13 min, and then irradiate with ultraviolet light under nitrogen at an intensity of 13 mW / cm 2 , the illumination time is 1.5h, stirring is performed while irradiating, the stirring rate is controlled to be 150rpm, filtering, washing with deionized water 3 times, and drying at 70°C for 4h to obtain intermediate 2; wherein the mass ratio of intermediate 1, ethanol, sodium 4-mercaptobutanesulfonate and anthracene dimethyl ether is 4:45:0.7:0.015; B3. Disperse intermediate 2 in dimethylformamide, stir at 130 rpm for 6 min, add propylenediamine, stir at 90 rpm for 12 min, then add 4-dimethylaminopyridine, heat to 75 ° C, stir at 150 rpm for 7 h, filter, wash with anhydrous ethanol 3 times, and dry at 80 ° C for 6 h to obtain modified medical stone; wherein the mass ratio of intermediate 2, dimethylformamide, propylenediamine and 4-dimethylaminopyridine is 3:50:0.6:0.015.

[0036] Comparative Example 1 Comparative Example 1 is the same as Example 1, except that the preparation method of the modified bamboo velvet is different, as follows: Modified bamboo velvet is prepared by the following method: Mix lavender, chrysanthemum, camphor wood and phellodendron in a mass ratio of 2:1:0.3:0.2, grind into a mixed powder of 100 mesh, add an extractant 5 times the mass of the mixed powder, mix and stir, stir at 100 rpm for 10 minutes, soak at 45°C for 8 hours, centrifuge at 8000 rpm for 2 minutes, and collect the filtrate; wherein the extractant is prepared by mixing anhydrous ethanol and methyl trioctyl ammonium chloride in a mass ratio of 1:0.5; The bamboo wool was completely immersed in the filtrate, the mass of the bamboo wool being 10% of the mass of the filtrate, and was immersed at 50°C for 1 hour, filtered, and dried at 65°C for 3 hours to obtain modified bamboo wool.

[0037] Comparative Example 2 Comparative Example 2 is the same as Example 1, except that the preparation method of the modified bamboo velvet is different, as follows: Modified bamboo velvet is prepared by the following method: Mix 4-hydroxy-3-methoxycinnamic acid and anhydrous ethanol in a mass ratio of 2:74, add p-toluenesulfonic acid (3% by mass of 4-hydroxy-3-methoxycinnamic acid), stir at 100 rpm for 5 min, add bamboo wool, stir at 45 ° C for 2 h, and the stirring rate is 80 rpm. Filter, wash 3 times with deionized water, and dry at 65 ° C for 4 h to obtain modified bamboo wool, wherein the mass ratio of bamboo wool to 4-hydroxy-3-methoxycinnamic acid is 2:1.

[0038] Comparative Example 3 Comparative Example 3 is the same as Example 1, except that the preparation method of the modified medical stone is different, as follows: Modified medical stone is prepared by the following method: B1, grinding medical stone into a fine powder of 200 mesh, dispersing the medical stone fine powder in toluene, adding maleic anhydride, stirring at 100 rpm for 5 min, then adding benzoyl peroxide, stirring at 60 rpm for 10 min, heating at 80 ° C for 3 h, controlling the stirring rate to 80 rpm, filtering, washing with deionized water 3 times, and drying at 60 ° C for 3 h to obtain intermediate 1; wherein the mass ratio of medical stone fine powder, toluene, maleic anhydride and benzoyl peroxide is 5:50:1:0.1; B2. Disperse intermediate 1 in dimethylformamide, stir at 100 rpm for 5 min, add propylenediamine, stir at 80 rpm for 15 min, then add 4-dimethylaminopyridine, heat to 65 ° C, stir at 100 rpm for 6 h, filter, wash 3 times with anhydrous ethanol, and dry at 70 ° C for 5 h to obtain modified medical stone; wherein the mass ratio of intermediate 1, dimethylformamide, propylenediamine and 4-dimethylaminopyridine is 2:45:0.5:0.01.

[0039] Comparative Example 4 Comparative Example 4 is the same as Example 1, except that the preparation method of the modified polyester fiber is different, as follows: The modified polyester fiber is prepared by the following method: The functionalized polyester fiber was mixed with dimethylformamide, stirred at 60 rpm for 5 min, medical stone was added, stirred at 100 rpm for 10 min, sodium carbonate was added, stirred at 60 rpm for 8 min, heated to 80°C, stirred at 150 rpm for 6 h, and after cooling to room temperature, filtered, washed with ethanol for 3 times, and dried at 70°C for 8 h to obtain modified polyester fiber; wherein the mass ratio of the functionalized polyester fiber, dimethylformamide, medical stone and sodium carbonate was 3:60:1:0.1.

[0040] Comparative Example 5 Comparative Example 5 is the same as Example 1, except that the preparation method of the functionalized polyester fiber is different, as follows: Functionalized polyester fiber is prepared by the following method: A1. Mix citric acid and deionized water in a mass ratio of 10:62, stir at 60 rpm for 8 min, add a catalyst of 4% by mass of citric acid and an antioxidant of 0.5% by mass of citric acid, and stir for 5 min to obtain a citric acid solution; wherein the catalyst is sodium bisulfate and the antioxidant is 2,6-di-tert-butyl-4-methylphenol; A2, mixing high elastic polyester fiber and citric acid solution in a mass ratio of 3:35, controlling the stirring rate to 150 rpm, stirring at 120° C. for 3 h, filtering, washing with deionized water 3 times, and drying at 60° C. for 4 h to obtain carboxylated polyester fiber; A3. Weigh carboxylated polyester fiber, epichlorohydrin and deionized water in a mass ratio of 2:0.5:25, mix the carboxylated polyester fiber and deionized water, ultrasonically disperse at 20 kHz for 10 min, add epichlorohydrin, stir for 15 min, control the stirring rate to 100 rpm, adjust the pH to 9, heat to 50°C, stir for 3 h, filter, wash 3 times with deionized water, and dry at 60°C for 4 h to obtain functionalized polyester fiber.

[0041] Comparative Example 6 Comparative Example 6 is the same as Example 1, except that the preparation method of the functionalized polyester fiber is different, as follows: Functionalized polyester fiber is prepared by the following method: A1. Mix citric acid and deionized water in a mass ratio of 10:62, stir at 60 rpm for 8 min, add a catalyst of 4% by mass of citric acid and an antioxidant of 0.5% by mass of citric acid, and stir for 5 min to obtain a citric acid solution; wherein the catalyst is sodium bisulfate and the antioxidant is 2,6-di-tert-butyl-4-methylphenol; A2, mixing high elastic polyester fiber and citric acid solution in a mass ratio of 3:35, controlling the stirring rate to 150 rpm, stirring at 120° C. for 3 h, filtering, washing with deionized water 3 times, and drying at 60° C. for 4 h to obtain carboxylated polyester fiber; A3. Weigh carboxylated polyester fiber, 3-mercapto-1,2-propylene glycol and deionized water in a mass ratio of 2:0.5:25, mix the carboxylated polyester fiber and deionized water, ultrasonically disperse at 20 kHz for 10 min, add 3-mercapto-1,2-propylene glycol, stir for 15 min, control the stirring rate to 100 rpm, adjust the pH to 9, heat to 50°C, stir for 3 h, filter, wash 3 times with deionized water, and dry at 60°C for 4 h to obtain functionalized polyester fiber.

[0042] Comparative Example 7 Comparative Example 7 is the same as Example 1, except that the preparation method of the functionalized polyester fiber is different, as follows: Functionalized polyester fiber is prepared by the following method: Weigh high-elastic polyester fiber, epichlorohydrin, 3-mercapto-1,2-propylene glycol and deionized water in a mass ratio of 2:0.5:0.5:25, mix the carboxylated polyester fiber and deionized water, ultrasonically disperse at 20 kHz for 10 minutes, add epichlorohydrin and 3-mercapto-1,2-propylene glycol, stir for 15 minutes, control the stirring rate to 100 rpm, adjust the pH to 9, heat to 50°C, stir for 3 hours, filter, wash 3 times with deionized water, and dry at 60°C for 4 hours to obtain functionalized polyester fiber.

[0043] Performance Testing The following performance tests were performed on the bamboo velvet high elastic cloud-feel cotton obtained in Examples 1-3 and Comparative Examples 1-7: Resilience test: Test according to GB / T10652-2001, repeat the measurement 5 times on different parts of the sample, and take the average value as the final resilience of the test sample; Air permeability test: Tested according to GB / T5453-1997 "Determination of air permeability of textile fabrics"; Hygroscopicity test: Tested according to GB / T21665.1-2008; Antibacterial performance test: Tested according to "GB / T 20944.3-2008 Evaluation of antibacterial properties of textiles Part 3 Oscillation method".

[0044] Table 1 Performance indexes of bamboo velvet high elastic cloud-feel cotton

[0045] It can be seen from the test data in Table 1 that the comprehensive performance of the bamboo velvet high-elastic cloud-feel cotton provided by the present invention is significantly better than the cloud-feel cotton prepared in Comparative Examples 1-7.

[0046] It can be seen from the results shown in Example 1 of the present invention and Comparative Examples 1-2 that the present invention first mixes lavender, chrysanthemum, camphor wood and phellodendron to prepare a mixed powder, then extracts with an extractant to obtain a filtrate, soaks bamboo wool in the filtrate, and then reacts it with 4-hydroxy-3-methoxycinnamic acid to finally obtain modified bamboo wool, which has excellent comprehensive properties. If the bamboo wool is not soaked in plant extracts or is not reacted with 4-hydroxy-3-methoxycinnamic acid, the performance of the bamboo wool will be reduced.

[0047] As shown in Example 1 and Comparative Examples 3, the present invention introduces sulfonic acid groups on the surface of medical stone, and the sulfonic acid groups have strong polarity, which can change the interaction force between fiber molecular chains. Meanwhile, as a hydrophilic group, it has strong electron-withdrawing ability and can enhance the hygroscopic properties of medical stone. When modified medical stone is grafted onto polyester fiber, the sulfonic acid groups can change the interaction force between fibers, increase the space between fibers, and provide more channels for air circulation, thereby improving the air permeability of fiber.

[0048] As can be seen from Example 1 and Comparative Examples 5-7, the high-elastic polyester fiber is first reacted with citric acid, and the citric acid plays a dual role: on the one hand, it introduces carboxyl groups for subsequent reactions into the polyester fiber; on the other hand, it effectively improves the surface activity of the polyester fiber; then the carboxylated polyester fiber treated with citric acid is mixed with epichlorohydrin and 3-mercapto-1,2-propylene glycol for reaction. Epichlorohydrin and 3-mercapto-1,2-propylene glycol jointly modify the carboxylated polyester fiber. This synergistic modification method is effective, not only further enhancing the antibacterial properties of the polyester fiber, but also achieving a better balance in the properties of the polyester fiber in terms of flexibility and strength, and finally successfully producing a functional polyester fiber.

[0049] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A preparation process of bamboo velvet high elastic cloud-feel cotton, characterized in that: The following steps are involved: S1, mixing modified bamboo velvet, modified polyester fiber and low melting point polyester fiber in a mass ratio of 2-4:4-6:1-3, stirring, opening and combing into a web to obtain a fiber web; S2, pre-puncturing and main-puncturing the fiber web to obtain a semi-finished product; hot-melt shaping, cutting and packaging the semi-finished product to obtain bamboo velvet high-elastic cloud-feel cotton.

2. The preparation process according to claim 1, characterized in that: The modified bamboo wool is prepared by the following method: Mix lavender, chrysanthemum, camphor wood and phellodendron in a mass ratio of 2-3:1-1.5:0.3-0.5:0.2-0.4, grind into a mixed powder of 100-150 mesh, add an extractant 5-8 times the mass of the mixed powder, mix and stir, heat and soak for 8-12 hours, centrifuge, and collect the filtrate; Adding bamboo wool to the filtrate, the weight of the bamboo wool is 10-25% of the weight of the filtrate, heating and soaking for 1-2 hours, filtering, and drying to obtain pretreated bamboo wool; Mix 4-hydroxy-3-methoxycinnamic acid and anhydrous ethanol in a mass ratio of 2-6:74-80, add p-toluenesulfonic acid, stir for 5-8 minutes, add pretreated bamboo wool, stir for 2-4 hours, filter, wash and dry to obtain modified bamboo wool.

3. The preparation process according to claim 2, characterized in that: The extractant is prepared by mixing anhydrous ethanol and methyl trioctyl ammonium chloride in a mass ratio of 1-2:0.5-0.

8.

4. The preparation process according to claim 1, characterized in that: The modified polyester fiber is prepared by the following method: The functionalized polyester fiber is mixed with dimethylformamide, stirred for 5-8 minutes, modified medical stone is added, stirred for 10-20 minutes, sodium carbonate is added, stirred for 8-12 minutes, heated to 80-100°C, stirred for 6-8 hours, cooled to room temperature, filtered, washed, and dried to obtain the modified polyester fiber; wherein the mass ratio of the functionalized polyester fiber, dimethylformamide, modified medical stone and sodium carbonate is 3-5:60-70:1-3:0.1-0.

2.

5. The preparation process according to claim 4, characterized in that: The functionalized polyester fiber is prepared by the following method: A1. Mix citric acid and deionized water in a mass ratio of 10-25:62-90, stir for 8-10 min, add a catalyst of 4-6% by mass of citric acid and an antioxidant of 0.5-1% by mass of citric acid, stir for 5-8 min, and obtain a citric acid solution; A2, mixing high elastic polyester fiber and citric acid solution in a mass ratio of 3-5:35-50, heating and stirring for 3-6 hours, filtering, washing, and drying to obtain carboxylated polyester fiber; A3. Weigh carboxylated polyester fiber, epichlorohydrin, 3-mercapto-1,2-propylene glycol and deionized water in a mass ratio of 2-5:0.5-2:0.5-1:25-35, mix the carboxylated polyester fiber and deionized water, ultrasonically disperse for 10-15 minutes, then add epichlorohydrin and 3-mercapto-1,2-propylene glycol, stir for 15-20 minutes, adjust the pH, heat and stir for 3-5 hours, filter, wash and dry to obtain functionalized polyester fiber.

6. The preparation process according to claim 4, characterized in that: Described modified medical stone is prepared by the following method: B1, grind medical stone into fine powder of 200-300 mesh, disperse the medical stone fine powder in toluene, add maleic anhydride, stir for 5-10 minutes, then add benzoyl peroxide, stir for 10-15 minutes, heat for 3-4 hours, filter, wash, and dry to obtain intermediate 1; B2, dispersing intermediate 1 in ethanol, ultrasonically dispersing for 8-15 minutes, adding sodium 4-mercaptobutanesulfonate and benzoin dimethyl ether, stirring for 10-15 minutes, then irradiating with ultraviolet light under nitrogen, stirring while irradiating, filtering, washing, and drying to obtain intermediate 2; B3. Disperse intermediate 2 in dimethylformamide, stir for 5-7 minutes, add propylenediamine, stir for 10-15 minutes, then add 4-dimethylaminopyridine, heat and stir for 6-8 hours, filter, wash and dry to obtain modified medical stone.

7. The preparation process according to claim 6, characterized in that: In the step B1, the mass ratio of medical stone fine powder, toluene, maleic anhydride and benzoyl peroxide is 5-8:50-60:1-2:0.1-0.

2.

8. The preparation process according to claim 6, characterized in that: In the step B2, the mass ratio of the intermediate 1, ethanol, sodium 4-mercaptobutanesulfonate and anthracene dimethyl ether is 3-5:40-50:0.5-0.8:0.01-0.

02.

9. The preparation process according to claim 6, characterized in that: The mass ratio of the intermediate 2, dimethylformamide, propylenediamine and 4-dimethylaminopyridine in the step B3 is 2-4:45-55:0.5-0.7:0.01-0.

02.

10. A bamboo velvet high elastic cloud-feel cotton, characterized in that: The method is prepared according to the preparation process of the bamboo velvet high-elastic cloud-feel cotton according to any one of claims 1 to 9.

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