Solid kapok viscose fiber and preparation method thereof

Abstract

The invention relates to the technical field of textile fibers, in particular to a solid kapok viscose fiber and a preparation method thereof. According to the solid kapok viscose fiber provided by the invention, the viscose fiber is modified by adopting active components of kapok, so that the solid kapok viscose fiber with an antibacterial effect is prepared. The solid kapok viscose fiber combines the advantages of the kapok and the viscose fiber, and has the advantages of light weight, good heat retention property, high antibacterial and acarus killing effect, good moisture absorption and quick drying property and strong mechanical property. The solid kapok viscose fiber provided by the invention overcomes the defects of poor antibacterial property, low fiber strength and low stability of common viscose fibers, and the solid kapok viscose fiber is remarkably superior to traditional viscose fibers in functionality, sustainability and application range; wide application prospects are realized in the fields of clothes, home textiles, industrial textiles, filling materials and the like.

Description

Technical Field

[0001] This invention relates to the field of textile fiber technology, specifically to a solid cotton viscose fiber and its preparation method. Background Technology

[0002] Viscose fiber belongs to the category of regenerated cellulose fibers. It is made from natural plant fibers through processes such as impregnation, aging, and xanthation to produce soluble cellulose xanthate, which is then dissolved in a dilute alkali solution to form viscose. This viscose is then wet-spun in a coagulation bath. Viscose fiber possesses unique physical and chemical properties, exhibiting excellent spinnability. It can be spun purely or blended with various fibers. These fabrics not only have excellent drape but also possess characteristics such as moisture absorption and breathability, good dyeing properties, antistatic properties, and UV resistance, bringing numerous conveniences to the clothing and home textile industries. With the continuous development of science and technology, various new functional viscose fibers based on viscose fiber have emerged, greatly expanding the application market for viscose fiber.

[0003] Patent document CN114197210A discloses a hydrophobically modified viscose fiber and its preparation method. The hydrophobically modified viscose fiber is prepared by mixing softwood dissolving pulp with a whiteness of over 89% and a methyl cellulose content of over 90% with hardwood dissolving pulp. After a series of treatments, a viscose spinning solution is prepared and uniformly mixed with a titanium dioxide dispersion before being fed into the spinning machine. The spinning solution is then fed into the spinning machine for reaction coagulation and regeneration to produce nascent fibers. The coagulated and regenerated nascent fibers are then drawn, oriented, and cut before entering the pile groove to form viscose short fibers with uniform fiber layer thickness. The viscose short fibers exiting the pile groove are fed into a refining machine, where the fiber surface is hydrophobically modified in the oiling process of the refining process, and then dried to obtain the final product. The obtained hydrophobic viscose fiber has the advantages of good hydrophobic properties and good wash resistance.

[0004] Patent document CN115613359A discloses an antibacterial protein-modified viscose fiber and its manufacturing process. The manufacturing process includes: mixing a carboxymethyl cellulose solution, a chitosan solution, and a collagen solution to obtain a mixed solution A; adding a blocked isocyanate crosslinking agent to ethanol and stirring until homogeneous, then adding an organosilicon surfactant and stirring until homogeneous to obtain a mixed solution B; adding mixed solution B to mixed solution A and stirring to obtain a mixed solution C; immersing the viscose fiber in mixed solution C, heating and stirring to perform grafting; after grafting, removing the viscose fiber, drying it, washing it with water, and drying it again to obtain the final product. The resulting antibacterial protein-modified viscose fiber has a soft and smooth feel, a soft luster, good drape, good air permeability and moisture absorption, good strength, good washability and heat resistance, and antibacterial properties, making it particularly suitable for use in home textile products.

[0005] Currently, among various modified viscose fibers, those with antibacterial properties have attracted widespread consumer attention. However, these antibacterial viscose fibers are prone to defects such as low fiber strength, poor mechanical properties, and unstable antibacterial effects during application, making it difficult to meet market demands. Therefore, researching and developing viscose fiber textile materials with good mechanical properties, lightweight, good warmth retention, excellent moisture absorption and quick-drying properties, and stable antibacterial and mite-repellent effects remains a research challenge. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a solid kapok viscose fiber and its preparation method. The solid kapok viscose fiber provided by this invention is produced by modifying viscose fiber with kapok flowers, resulting in a solid kapok viscose fiber with antibacterial properties. Through biomimetic structural design, integration of natural functions, and environmentally friendly process upgrades, this invention not only combines the advantages of kapok flowers and viscose fiber, possessing advantages such as lightness, good warmth retention, high antibacterial and anti-mite effects, excellent moisture absorption and quick-drying properties, and strong mechanical properties, but also effectively solves the defects of ordinary viscose fiber, such as poor antibacterial performance, low fiber strength, and low stability. This solid kapok viscose fiber is significantly superior to traditional viscose fiber in terms of functionality, sustainability, and application range, and is a novel biomass fiber with significant application value.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: This invention provides a method for preparing solid cotton viscose fiber, comprising the following steps: Step S1: Preparation of porous support: Hexadecyltrimethylammonium bromide and polyethylene glycol PEG-6000 were added to deionized water at 30-35 ℃ and stirred for 30-35 min. Then, mesitylene was added and stirred for 30-35 min. Water glass was added at a feeding rate of 0.5-1.5 g / min and stirred for 1-2 h. The pH was adjusted and the mixture was allowed to stand at 30-35 ℃ for 10-12 h. Then, the temperature was raised to 100-110 ℃ and crystallized for 20-22 h. The crystals were filtered out, washed, and dried at 75-85 ℃ for 18-20 h. Finally, the mixture was calcined at 400-500 ℃ for 3-5 h to obtain a porous carrier. Step S2, Modification of porous carrier: The porous carrier obtained in step S1 was added to an ethanol solution and ultrasonically dispersed evenly. Under stirring conditions, silane coupling agent KH-550 and silane coupling agent KH-580 were added dropwise at a rate of 1~3 mL / min. After the addition was completed, the pH was adjusted and the reaction was carried out under nitrogen protection and light protection. After the reaction was completed, the solid was centrifuged, washed, and dried to obtain the modified porous carrier. Step S3, Preparation of active ingredients: The modified porous carrier obtained in step S2 was added to a kapok flower solution for adsorption reaction, washed, and dried at a vacuum of 0.01 MPa and a temperature of 45 ℃ until the moisture content was 1~2 wt% to obtain the active ingredient. Step S4, Preparation of spinning solution: The active ingredient obtained in step S3 is added to deionized water and stirred evenly to obtain an active ingredient solution; then the active ingredient solution, silane coupling agent KH-792, sodium alginate, and sodium carboxymethyl cellulose are added to the viscose fiber spinning solution, mixed evenly, filtered, defoamed, and matured to obtain the spinning solution. Step S5, spinning: The spinning solution obtained in step S4 is introduced into the spinning machine and spun at a spinning speed of 15~18 m / min. The spinning solution is spun into a coagulation bath at a temperature of 40~45 ℃, where it is solidified, desulfurized, washed with water, oiled, and dried to obtain the final product.

[0008] Furthermore, the raw material for the porous carrier in step S1 includes the following components and their weight proportions: 1-50 parts of hexadecyltrimethylammonium bromide, 1-50 parts of polyethylene glycol PEG-6000, 1-50 parts of mesitylene, 1-50 parts of water glass, and 1-50 parts of deionized water.

[0009] Preferably, the raw material for the porous carrier in step S1 includes the following components and their weight proportions: 5-30 parts of hexadecyltrimethylammonium bromide, 5-15 parts of polyethylene glycol PEG-6000, 15-35 parts of mesitylene, 20-40 parts of water glass, and 25-40 parts of deionized water.

[0010] Furthermore, in step S1, a 2 mol / L hydrochloric acid solution is used to adjust the pH value to 9-10.

[0011] Furthermore, the raw materials for the porous carrier modification in step S2 include the following components and their weight proportions: 0.1-5 parts of porous carrier, 3.5-175 parts of ethanol solution, 0.1-5 parts of silane coupling agent KH-550, and 0.1-5 parts of silane coupling agent KH-580.

[0012] Preferably, the raw material for the porous carrier modification in step S2 includes the following components and their weight proportions: 1.0~4.0 parts of porous carrier, 50~100 parts of 75% ethanol solution, 0.5~2.5 parts of silane coupling agent KH-550, and 0.5~2.5 parts of silane coupling agent KH-580.

[0013] Furthermore, the ethanol solution in step S2 is an aqueous ethanol solution with a volume concentration of 75%, and the ultrasonic dispersion power is 400W and the rotation speed is 250 rpm.

[0014] Furthermore, in step S2, acetic acid is used to adjust the pH value to 4.0~5.0.

[0015] Furthermore, the reaction conditions in step S2 are: stirring and refluxing for 4-5 hours at a temperature of 45-55 ℃ and a rotation speed of 50-60 rpm.

[0016] Furthermore, in step S3, the amount of kapok flower solution added is 85 to 95 times the weight of the modified porous carrier. The kapok flower solution is prepared by directly pulverizing dried kapok flowers, adding water, and preparing a kapok flower solution containing 1% to 20% w / v kapok flower components. The kapok flowers include petals, stamens, and sepals.

[0017] Furthermore, the adsorption conditions in step S3 are: stirring and adsorption for 20-24 h at a temperature of 30-33 ℃ and a rotation speed of 40-50 rpm.

[0018] Furthermore, the raw materials of the spinning solution in step S4 include the following components and their weight proportions: 1-50 parts of active ingredient, 80-4000 parts of deionized water, 1-50 parts of silane coupling agent KH-792, 1-50 parts of sodium alginate, 1-50 parts of sodium carboxymethyl cellulose, and 1-50 parts of viscose fiber spinning solution.

[0019] Preferably, the raw materials of the spinning solution in step S4 include the following components and their weight proportions: 10-25 parts of active ingredient, 500-2500 parts of deionized water, 8-25 parts of silane coupling agent KH-792, 5-18 parts of sodium alginate, 3-12 parts of sodium carboxymethyl cellulose, and 20-35 parts of viscose fiber spinning solution.

[0020] In addition, the present invention also claims protection for the solid cotton viscose fiber obtained by the aforementioned solid cotton viscose fiber preparation method.

[0021] Currently, existing antibacterial viscose fibers are generally produced by adding antibacterial agents to the viscose fiber spinning solution and then blending them. However, the antibacterial agents are prone to uneven distribution and poor adsorption during the blending process, resulting in low and unstable antibacterial effects in the viscose fibers. To solve these problems, the inventors have for the first time proposed adsorbing the active ingredients of kapok flowers into a self-made modified porous carrier to form active ingredients, which are then mixed evenly with the viscose fiber spinning solution before spinning. The resulting solid kapok viscose fiber combines the advantages of kapok flowers and viscose fibers, possessing the advantages of being lightweight, having good warmth retention, high antibacterial and anti-mite effects, excellent moisture absorption and quick-drying properties, and strong mechanical properties, making it a relatively ideal textile material.

[0022] Compared with the prior art, the method for preparing solid cotton viscose fiber provided by the present invention has the following advantages: (1) The method for preparing solid kapok viscose fiber provided by the present invention can significantly improve the antibacterial and mite-repellent effects of the fiber: The present invention uses a special spinning process to modify the active ingredients of kapok flowers with porous encapsulation, which can well retain the natural antibacterial and antioxidant active ingredients of flavonoids and tannins in kapok flowers, so that the obtained solid kapok viscose fiber has an antibacterial rate of >95% against Staphylococcus aureus, Escherichia coli and Candida albicans and a mite-repellent rate of >75%, and is a fiber material with antibacterial and mite-repellent effects.

[0023] (2) The method for preparing solid kapok viscose fiber provided by the present invention can significantly improve the warmth and lightness of the fiber: The present invention uses modified porous carrier-embedded kapok flowers and viscose fibers to blend, which can make the viscose fibers have a porous and hollow structure. This not only solves the problem of the heavy weight of ordinary viscose fibers, but also effectively improves the thermal conductivity of viscose fibers, making it a light, soft, and warm fiber material.

[0024] (3) The method for preparing solid cotton viscose fiber provided by the present invention can significantly improve the mechanical properties of the fiber: the dry breaking strength of the solid cotton viscose fiber prepared by the present invention is >2.45cN / dtex, the wet breaking strength is >1.24cN / dtex, and the wear resistance is improved by more than 30% compared with ordinary viscose fiber, which can significantly improve the wear resistance of the fiber. Detailed Implementation

[0025] The present invention will be further described below through specific embodiments, but this is not intended to limit the invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the invention, but as long as they do not depart from the basic idea of ​​the invention, they are all within the scope of the invention. The raw materials and components involved in the present invention can all be obtained commercially available or through conventional techniques in the art.

[0026] Example 1: A method for preparing solid cotton viscose fiber Step S1: Preparation of porous support: Hexadecyltrimethylammonium bromide and polyethylene glycol PEG-6000 were added to deionized water at 35 ℃ and stirred for 30 min. Then, mesitylene was added and stirred for another 30 min. Water glass was added at a feeding rate of 1 g / min and stirred for 1.5 h. The pH was adjusted to 10 with a 2 mol / L hydrochloric acid solution. After standing at 35 ℃ for 12 h, the temperature was raised to 105 ℃ and crystallized for 20 h. The crystals were filtered out, washed with 12 times the volume of deionized water, dried at 80 ℃ for 18 h, and then calcined at 450 ℃ for 4 h to obtain a porous carrier. The raw material of the porous carrier consists of the following components and their weight proportions: 5 parts hexadecyltrimethylammonium bromide, 5 parts polyethylene glycol PEG-6000, 15 parts mesitylene, 20 parts water glass, and 40 parts deionized water.

[0027] Step S2, Modification of porous carrier: The porous support obtained in step S1 was added to 35 parts by weight of ethanol solution and ultrasonically dispersed evenly. The ultrasonic conditions were: power 400W, 250 rpm. Under stirring, silane coupling agent KH-550 and silane coupling agent KH-580 were added dropwise at a rate of 2 mL / min. After the addition was completed, the pH value was adjusted to 4.5 with acetic acid. Under nitrogen protection and light protection, the mixture was stirred and refluxed for 5 h at a temperature of 50 ℃ and a speed of 50 rpm. After the reaction was completed, the solid was centrifuged, washed with 8 volumes of anhydrous ethanol, then washed with 18 volumes of deionized water, and dried at 45 ℃ to obtain the modified porous support. The raw material for the porous carrier modification consists of the following components and their weight proportions: 0.1 parts of porous carrier, 50 parts of 75% ethanol solution, 0.5 parts of silane coupling agent KH-550, and 0.5 parts of silane coupling agent KH-580.

[0028] Step S3, Preparation of active ingredients: The modified porous carrier obtained in step S2 was added to a kapok flower solution in 90 parts by weight. The kapok flower solution was prepared by directly pulverizing dried kapok flowers, adding water, and preparing a kapok flower solution containing 15% w / v kapok flower components. The kapok flowers included petals, stamens, and sepals. Then, the solution was stirred and adsorbed for 20 h at a temperature of 30 ℃ and a rotation speed of 50 rpm. It was then washed with 12 times the volume of deionized water and dried at a vacuum of 0.01 MPa and a temperature of 45 ℃ until the moisture content was 1 wt% to obtain the active ingredient. Step S4, Preparation of spinning solution: The active ingredient obtained in step S3 is added to 80 parts by weight of deionized water and stirred evenly to obtain an active ingredient solution; then the active ingredient solution, silane coupling agent KH-792, sodium alginate and sodium carboxymethyl cellulose are added to the viscose fiber spinning solution, mixed evenly, filtered, defoamed and matured to obtain the spinning solution. The raw material of the spinning solution consists of the following components and their weight proportions: 10 parts active ingredient, 500 parts deionized water, 8 parts silane coupling agent KH-792, 5 parts sodium alginate, 3 parts sodium carboxymethyl cellulose, and 35 parts viscose fiber spinning solution.

[0029] Step S5, spinning: The spinning solution obtained in step S4 is introduced into the spinning machine and spun at a spinning speed of 16 m / min. The spinning solution is then spun into a coagulation bath at a temperature of 40 ℃, where it is solidified, desulfurized, washed with water, oiled, and dried to obtain the final product.

[0030] Example 2: A method for preparing solid cotton viscose fiber Step S1: Preparation of porous support: Hexadecyltrimethylammonium bromide and polyethylene glycol PEG-6000 were added to deionized water at 30 ℃ and stirred for 35 min. Then, mesitylene was added and stirred for another 35 min. Water glass was added at a feeding rate of 0.8 g / min and stirred for 2 h. The pH was adjusted to 9 with a 2 mol / L hydrochloric acid solution. After standing at 30 ℃ for 12 h, the temperature was raised to 110 ℃ and kept at that temperature for 20 h to crystallize. The crystals were filtered out, washed with 12 times the volume of deionized water, dried at 75 ℃ for 20 h, and then calcined at 400 ℃ for 5 h to obtain a porous carrier. The raw material of the porous carrier consists of the following components and their weight proportions: 15 parts hexadecyltrimethylammonium bromide, 10 parts polyethylene glycol PEG-6000, 25 parts mesitylene, 30 parts water glass, and 30 parts deionized water.

[0031] Step S2, Modification of porous carrier: The porous support obtained in step S1 was added to 35 parts by weight of ethanol solution and ultrasonically dispersed evenly. The ultrasonic conditions were: power 400W, 250 rpm. Under stirring, silane coupling agent KH-550 and silane coupling agent KH-580 were added dropwise at a rate of 1 mL / min. After the addition was completed, the pH value was adjusted to 4.0 with acetic acid. Under nitrogen protection and light protection, the mixture was stirred and refluxed for 4 h at a temperature of 55 ℃ and a speed of 60 rpm. After the reaction was completed, the mixture was centrifuged, the solid was taken, washed with 8 volumes of anhydrous ethanol, washed with 18 volumes of deionized water, and dried at 45 ℃ to obtain the modified porous support. The raw material for the porous carrier modification consists of the following components and their weight proportions: 2.5 parts of porous carrier, 100 parts of 75% ethanol solution, 1.5 parts of silane coupling agent KH-550, and 1.5 parts of silane coupling agent KH-580.

[0032] Step S3, Preparation of active ingredients: The modified porous carrier obtained in step S2 was added to a kapok flower solution in 90 parts by weight. The kapok flower solution was prepared by directly pulverizing dried kapok flowers, adding water, and preparing a kapok flower solution containing 12% w / v kapok flower components. The kapok flowers included petals, stamens, and sepals. Then, the solution was stirred and adsorbed for 24 h at a temperature of 33 ℃ and a rotation speed of 40 rpm. It was then washed with 12 times the volume of deionized water and dried at a vacuum of 0.01 MPa and a temperature of 45 ℃ until the moisture content was 2 wt% to obtain the active ingredient. Step S4, Preparation of spinning solution: The active ingredient obtained in step S3 is added to 80 parts by weight of deionized water and stirred evenly to obtain an active ingredient solution; then the active ingredient solution, silane coupling agent KH-792, sodium alginate and sodium carboxymethyl cellulose are added to the viscose fiber spinning solution, mixed evenly, filtered, defoamed and matured to obtain the spinning solution. The raw material of the spinning solution consists of the following components and their weight proportions: The active ingredient consists of 25 parts, deionized water 1200 parts, silane coupling agent KH-792 15 parts, sodium alginate 12 parts, sodium carboxymethyl cellulose 8 parts, and viscose fiber spinning solution 28 parts.

[0033] Step S5, spinning: The spinning solution obtained in step S4 is introduced into the spinning machine and spun at a spinning speed of 15 m / min. The spinning solution is then spun into a coagulation bath at a temperature of 40 ℃, where it is solidified, desulfurized, washed with water, oiled, and dried to obtain the final product.

[0034] Example 3: A method for preparing solid cotton viscose fiber Step S1: Preparation of porous support: Hexadecyltrimethylammonium bromide and polyethylene glycol PEG-6000 were added to deionized water at 33 ℃ and stirred for 33 min. Then, mesitylene was added and stirred for another 33 min. Water glass was added at a feeding rate of 1.2 g / min and stirred for 2 h. The pH was adjusted to 10 with a 2 mol / L hydrochloric acid solution. After standing at 33 ℃ for 12 h, the temperature was raised to 100 ℃ and crystallized for 22 h. The crystals were filtered out, washed with 12 times the volume of deionized water, dried at 85 ℃ for 18 h, and then calcined at 500 ℃ for 3 h to obtain a porous carrier. The raw material of the porous carrier consists of the following components and their weight proportions: 30 parts of cetyltrimethylammonium bromide, 15 parts of polyethylene glycol PEG-6000, 35 parts of mesitylene, 40 parts of water glass, and 25 parts of deionized water.

[0035] Step S2, Modification of porous carrier: The porous support obtained in step S1 was added to 35 parts by weight of ethanol solution and ultrasonically dispersed evenly. The ultrasonic conditions were: power 400W, 250 rpm. Under stirring, silane coupling agent KH-550 and silane coupling agent KH-580 were added dropwise at a rate of 3 mL / min. After the addition was completed, the pH value was adjusted to 5.0 with acetic acid. Under nitrogen protection and light protection, the mixture was stirred and refluxed for 5 h at a temperature of 45 ℃ and a speed of 60 rpm. After the reaction was completed, the mixture was centrifuged, and the solid was washed with 8 volumes of anhydrous ethanol and then washed with 18 volumes of deionized water. The solid was dried at 45 ℃ to obtain the modified porous support. The raw material for the porous carrier modification consists of the following components and their weight proportions: 4.0 parts of porous carrier, 150 parts of 75% ethanol solution, 2.5 parts of silane coupling agent KH-550, and 2.5 parts of silane coupling agent KH-580.

[0036] Step S3, Preparation of active ingredients: The modified porous carrier obtained in step S2 was added to a kapok flower solution in 90 parts by weight. The kapok flower solution was prepared by directly pulverizing dried kapok flowers, adding water, and preparing a kapok flower solution containing 12% w / v kapok flower components. The kapok flowers included petals, stamens, and sepals. Then, the mixture was stirred and adsorbed for 22 h at a temperature of 30 ℃ and a rotation speed of 50 rpm. It was then washed with 12 times the volume of deionized water and dried at a vacuum of 0.01 MPa and a temperature of 45 ℃ until the moisture content was 1 wt% to obtain the active ingredient. Step S4, Preparation of spinning solution: The active ingredient obtained in step S3 is added to 80 parts by weight of deionized water and stirred evenly to obtain an active ingredient solution; then the active ingredient solution, silane coupling agent KH-792, sodium alginate and sodium carboxymethyl cellulose are added to the viscose fiber spinning solution, mixed evenly, filtered, defoamed and matured to obtain the spinning solution. The raw material of the spinning solution consists of the following components and their weight proportions: 40 parts of active ingredient, 2500 parts of deionized water, 25 parts of silane coupling agent KH-792, 18 parts of sodium alginate, 12 parts of sodium carboxymethyl cellulose, and 20 parts of viscose fiber spinning solution.

[0037] Step S5, spinning: The spinning solution obtained in step S4 is introduced into the spinning machine and spun at a spinning speed of 18 m / min. The spinning solution is then spun in a coagulation bath at a temperature of 40 ℃, where it is solidified, desulfurized, washed with water, oiled, and dried to obtain the final product.

[0038] Experiment Example 1: Antibacterial and anti-mite effects of solid cotton viscose fiber 1. Experimental Method: The antibacterial and mite-repellent rates of the solid cotton viscose fibers prepared in Examples 1, 2, and 3 were determined, with ordinary viscose fiber used as a control group. The antibacterial rate was determined according to GB / T 20944.3-2008 "Evaluation of antimicrobial properties of textiles - Part 3: Shaking method". The mite-repellent rate was tested by the Chinese Center for Disease Control and Prevention.

[0039] 2. Experimental Results: The experimental results are shown in Table 1.

[0040] Table 1. Antibacterial and anti-mite effects of solid cotton viscose fiber As shown in Table 1, compared with ordinary viscose fiber, the solid kapok viscose fiber prepared by the present invention has a higher antibacterial rate and a higher mite repellency rate, indicating that the viscose fiber modified with kapok flowers can effectively improve the antibacterial and mite repellency effects of viscose fiber. Among them, Example 2 is the best embodiment.

[0041] Experiment Example 2: Determination of the Lightness and Warmth Retention of Solid Cotton Viscose Fiber 1. Experimental Method: The lightness and warmth retention of the solid cotton viscose fibers prepared in Examples 1, 2, and 3 were determined, with ordinary viscose fibers serving as a control group. Lightness was expressed as weight density and measured using the density gradient tube method. Warmth retention was expressed as thermal conductivity and measured using the hot wire method.

[0042] 2. Experimental Results: The experimental results are shown in Table 2.

[0043] Table 2 Results of tests on the lightness and warmth retention of solid cotton viscose fiber As shown in Table 2, compared with ordinary viscose fiber, the solid cotton viscose fiber prepared by this invention has increased lightness by more than 15% and warmth retention by more than 20%, significantly improving the warmth retention and lightness of the fiber, which can effectively solve the problems of traditional chemical fibers being heavy and having poor warmth retention.

[0044] Experiment Example 3: Determination of Mechanical Properties of Solid Cotton Viscose Fiber 1. Experimental Method: The mechanical properties of the solid cotton viscose fibers prepared in Examples 1, 2, and 3 were determined, specifically the dry breaking strength, wet breaking strength, and dry breaking elongation. Ordinary viscose fiber was used as a control group. Specifically: Dry breaking strength test: Referring to GB / T 14463 standard, the dry fibers were stretched using a universal testing machine to determine the maximum load per unit linear density. Wet breaking strength test: The fibers were soaked in water for a certain period of time before the strength was tested to assess usability in humid environments. Breaking elongation test: The elongation ratio of the fiber when stretched to break was measured, reflecting its flexibility.

[0045] 2. Experimental Results: The experimental results are shown in Table 3.

[0046] Table 3 Mechanical properties of solid cotton viscose fiber As shown in Table 3, the dry breaking strength, wet breaking strength and dry breaking elongation of the solid wood cotton viscose fiber prepared by the present invention are all better than those of ordinary viscose fiber, indicating that the solid wood cotton viscose fiber provided by the present invention has high wear resistance and flexibility, and Example 2 is the best example.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for producing a viscose fiber from kapok, characterized by, It comprises the following steps: Step S1, porous carrier preparation: Put hexadecyl trimethyl ammonium bromide and polyethylene glycol PEG-6000 into deionized water with a temperature of 30-35 ℃, stir for 30-35 min, then put mesitylene, stir for 30-35 min, then put water glass at a feeding rate of 0.5-1.5 g / min, stir for 1-2 h, adjust pH, stand for 10-12 h at a temperature of 30-35 ℃, then heat to 100-110 ℃, keep for 20-22 h for crystallization, filter out the crystal grains, wash, dry at a temperature of 75-85 ℃ for 18-20 h, then calcine at a temperature of 400-500 ℃ for 3-5 h, to obtain the porous carrier; Step S2, porous carrier modification: Put the porous carrier prepared in step S1 into an ethanol solution, uniformly disperse by ultrasonic, under stirring, drop in silane coupling agent KH-550 and silane coupling agent KH-580 at a dropping rate of 1-3 mL / min, after dropping is completed, adjust pH, react under the conditions of nitrogen protection and light shielding, after reaction is completed, centrifugal, take the solid, wash, dry, to obtain the modified porous carrier; Step S3, active ingredient preparation: Put the modified porous carrier prepared in step S2 into kapok flower solution for adsorption reaction, wash, dry under the conditions of a vacuum degree of 0.01 MPa and 45 ℃, to obtain the active ingredient with a moisture content of 1-2 wt%; Step S4, spinning solution preparation: Put the active ingredient prepared in step S3 into deionized water, stir uniformly, to obtain the active ingredient solution; then put the active ingredient solution, silane coupling agent KH-792, sodium alginate and sodium carboxymethyl cellulose into viscose fiber spinning stock solution, mix uniformly, filter, defoam, ripen, to obtain the spinning solution; Step S5, spinning: Put the spinning solution prepared in step S4 into a spinning machine, spin at a spinning speed of 15-18 m / min, spin into a coagulation bath with a temperature of 40-45 ℃, spin solidification, desulfurization, washing, oiling and drying, to obtain the product.

2. The method for preparing solid cotton viscose fiber as described in claim 1, characterized in that, The raw materials of the porous carrier in step S1 comprise the following components and their weight fractions: hexadecyl trimethyl ammonium bromide 1-50 parts, polyethylene glycol PEG-6000 1-50 parts, mesitylene 1-50 parts, water glass 1-50 parts, deionized water 1-50 parts.

3. The method for preparing solid cotton viscose fiber as described in claim 1, characterized in that, In step S1, adjust pH to 9-10 by using a 2 mol / L hydrochloric acid solution.

4. The method for preparing solid cotton viscose fiber as described in claim 1, characterized in that, The raw materials for the modification of the porous carrier in step S2 comprise the following components and their weight fractions: porous carrier 0.1-5 parts, ethanol solution 3.5-175 parts, silane coupling agent KH-550 0.1-5 parts, silane coupling agent KH-580 0.1-5 parts.

5. The method for preparing solid cotton viscose fiber as described in claim 1, characterized in that, In step S2, adjust pH to 4.0-5.0 by using acetic acid.

6. The method for preparing solid cotton viscose fiber as described in claim 1, characterized in that, The reaction conditions of step S2 are as follows: stir under reflux at a temperature of 45-55 ℃ and a rotation speed of 50-60 rpm for 4-5 h.

7. The method for preparing solid cotton viscose fiber as described in claim 1, characterized in that, The adding amount of kapok flower solution in the step S3 is 85-95 times of the weight of the modified porous carrier, and the kapok flower solution is prepared by directly crushing dried kapok flower and adding water to obtain a kapok flower solution containing 1-20% w / v kapok flower component.

8. The method for preparing solid cotton viscose fiber as described in claim 1, characterized in that, The adsorption condition in the step S3 is stirring adsorption for 20-24 h under the condition of 30-33 ℃ and 40-50 rpm.

9. The method for preparing solid cotton viscose fiber as described in claim 1, characterized in that, The raw materials of the spinning solution in the step S4 include the following components and their weight fractions: active ingredient 1-50 parts, deionized water 80-4000 parts, silane coupling agent KH-792 1-50 parts, sodium alginate 1-50 parts, sodium carboxymethyl cellulose 1-50 parts, viscose fiber spinning solution 1-50 parts.

10. The solid kapok viscose fiber prepared by the method according to any one of claims 1-9.

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