阅读说明：本技术 一种高挺度黏胶纤维的制备方法 (Preparation method of high-stiffness viscose fibers ) 是由 曹建康 于 2019-07-30 设计创作，主要内容包括：本发明公开了一种高挺度黏胶纤维的制备方法,属于化纤领域。本发明对香蕉纤维碱泡去除纤维内的部分杂质和残留胶质等,再与瓜尔胶、辅料等共混,改善纤维表面的粗糙程度,再与玄武岩纤维球磨共混,保障黏胶纤维的挺括度和强度,避免面料发生损坏；以D-葡萄糖醛酸与活性剂进行反应,复合酶液成分进行催化氧化,能使部分活性位点暴露,并能够对纤维表面进行大分子改性并通过空间位阻和非极性作用,内部强度得以提高；以高吸水膨胀性的钠基膨润土、配合海藻酸钠等制黏胶胶液,通过离子交换,构成具有三维网状结构的水凝胶,稳定提升本纤维成分的挺扩度及强度的效果。本发明解决了目前常用黏胶纤维的挺括度及强度不佳,往往导致面料损坏的问题。(The invention discloses a preparation method of high-stiffness viscose fibers, and belongs to the field of chemical fibers. According to the invention, the banana fiber is subjected to alkali soaking to remove partial impurities, residual colloid and the like in the fiber, and then is blended with guar gum, auxiliary materials and the like, so that the roughness of the surface of the fiber is improved, and then is subjected to ball milling and blending with basalt fiber, so that the stiffness and strength of viscose fiber are ensured, and the fabric is prevented from being damaged; d-glucuronic acid reacts with an active agent, and the compound enzyme liquid component is subjected to catalytic oxidation, so that part of active sites can be exposed, macromolecule modification can be performed on the surface of the fiber, and the internal strength is improved through steric hindrance and nonpolar action; the hydrogel with a three-dimensional network structure is formed by using sodium bentonite with high water absorption expansibility and matching with viscose glue solution prepared from sodium alginate and the like through ion exchange, and the effects of stably improving the stiffness, the expansion and the strength of the fiber components are improved. The invention solves the problem that the stiffness and strength of the conventional viscose fiber are poor, so that the fabric is damaged frequently.)

1. The preparation method of the viscose fiber with high stiffness is characterized by comprising the following steps:

(1) adding a NaOH solution into banana fiber according to a mass ratio of 1: 12 ~ 20 to mix, soaking at room temperature, filtering, collecting filter residues, washing, drying to obtain a dried substance, mixing guar gum, the dried substance, auxiliary materials and water according to a mass ratio of 1: 4 ~ 8: 0.1: 25 ~ 35, pulping to obtain a slurry, adding cassava starch and an additive into the slurry according to a mass ratio of 20: 4 20 ~ 30: 3: 0.4 ~ 0.8.8, mixing and stirring to obtain a mixture;

(2) filtering the mixed material, adding basalt fiber and a ball milling medium into filter residue according to the mass ratio of 5 ~ 8: 1: 0.2, mixing, adding zirconia balls according to the ball material mass ratio of 30 ~ 40: 1, ball milling to obtain ball milling materials, drying the ball milling materials to obtain dried materials, and carrying out plasma treatment on the dried materials at the temperature of 12 ~ 18 ℃ in a nitrogen atmosphere to obtain treated materials for later use;

(3) adding citric acid solution and methylbenzene into p-hydroxymethylbenzaldehyde according to the mass ratio of 1: 12: 4 ~ 7 at 20 ~ 26 ℃, mixing, heating to 50 ~ 60 ℃, adding pyridine accounting for 2 ~ 5 times of the mass of the p-hydroxymethylbenzaldehyde and aniline accounting for 6 ~ 10 times of the mass of the p-hydroxymethylbenzaldehyde, mixing, keeping the temperature, stirring, cooling to obtain a cooling substance, adding reagent A into the cooling substance according to the mass ratio of 5 ~ 8: 18, and mixing to obtain an active agent;

(4) adding D-glucuronic acid into PBS buffer solution according to the mass ratio of 1: 12 ~ 20 to obtain mixed solution, adding mixed enzyme solution into the mixed solution according to the mass ratio of 20 ~ 40: 1 to obtain mixture, stirring and mixing, adding an active agent into the mixture according to the mass ratio of 10 ~ 20: 1 to obtain heat preservation treatment at 20 ~ 25 ℃, discharging and sterilizing to obtain enzyme treatment material, centrifuging the enzyme treatment material, collecting the centrifugate, and freeze-drying to obtain freeze-dried material for later use;

(5) according to the mass parts, taking 20 ~ 35 parts of the treated substance for standby in the step (2), 2 ~ 5 parts of birch juice, 0.2 ~ 0.5.5 parts of sodium bentonite, 1 ~ 4 parts of sodium alginate, 2 ~ 5 parts of carboxymethyl cellulose and 20 ~ 35 parts of water, mixing and stirring the treated substance, the sodium bentonite, the carboxymethyl cellulose and the water at 45 ~ 60 ℃, cooling to 20 ~ 35 ℃, adding the birch juice and the sodium alginate, mixing and stirring to obtain viscose glue solution;

(6) at the temperature of 25 ~ 32 ℃, according to the mass parts, 30 ~ 50 parts of viscose glue solution, 10 ~ 15 parts of standby freeze-dried material, 3 ~ 8 parts of dispersing agent, 1 ~ 3 parts of antioxidant, 7 ~ 12 parts of reagent B and 5 ~ 8 parts of composite reinforcing material are stirred and mixed, the mixture is stood, vacuumized and defoamed, wet spinning is carried out to obtain spinning material, and the spinning material is subjected to heat treatment at the temperature of 90 ~ 110 ℃ to obtain the high-stiffness viscose.

2. The preparation method of the viscose fiber with high stiffness according to claim 1, wherein in the step (1), the sodium laureth sulfate and the hydroxyethyl cellulose are mixed according to a mass ratio of 2 ~ 5: 1 to obtain the auxiliary material.

3. The preparation method of the high-stiffness viscose fiber according to claim 1, wherein the additive in the step (1) is prepared by mixing sodium tripolyphosphate, talcum powder and zinc stearate according to a mass ratio of 1: 3 ~ 7: 1.

4. The preparation method of the high-stiffness viscose fiber according to claim 1, wherein the ball milling medium in the step (2) is prepared by mixing acetone and ethanol solution according to a mass ratio of 2 ~ 5 to 1.

5. The preparation method of the viscose fiber with high stiffness according to claim 1, wherein the reagent A obtained in the step (3) is prepared by mixing ammonium chloride and potassium sulfate solution according to a mass ratio of 1: 6 ~ 10.

6. The preparation method of the viscose fiber with high stiffness according to claim 1, wherein the mixed enzyme solution in the step (4) is prepared by mixing, in parts by mass, 1 ~ 4 parts of beta-glucosidase, 2 ~ 5 parts of laccase and 500 ~ 700 parts of sterile water.

7. The preparation method of the high-stiffness viscose fiber according to claim 1, wherein the reagent B obtained in the step (6) is prepared by mixing triethylene tetramine and a sodium bicarbonate solution according to a mass ratio of 1: 20 ~ 30 to obtain the reagent B.

8. The preparation method of the viscose fiber with high stiffness according to claim 1, wherein the antioxidant in the step (6) is obtained by mixing tert-butyl hydroquinone and butyl hydroxy anisol according to a mass ratio of 3 ~ 7: 1.

9. The preparation method of the high-stiffness viscose fiber according to claim 1, wherein the dispersant in the step (6) is obtained by mixing alcohol ether phosphate, castor oil polyoxyethylene ether and sodium dodecyl benzene sulfonate according to a mass ratio of 1: 2 ~ 5: 5.2.

10. The preparation method of the high-stiffness viscose fiber according to claim 1, wherein the composite reinforcement material in the step (6) is prepared by mixing and stirring hydroxyapatite, polyethylene glycol and dichloromethane according to a mass ratio of 1: 4 ~: 50, adding acryloyl chloride accounting for 30 ~% of the mass of the hydroxyapatite and dichloromethane accounting for 5 ~ times of the mass of the hydroxyapatite, mixing, carrying out heat preservation treatment at 30 3645 ℃, carrying out suction filtration, and drying filter residues to obtain the composite reinforcement material.

Technical Field

The invention relates to the field of chemical fibers, in particular to a preparation method of high-stiffness viscose fibers.

Background

The viscose fiber is made up by using natural cellulose as raw material and making it pass through the processes of alkalization, ageing and yellowing, etc. to obtain spinning viscose and wet spinning. The viscose fiber has the structure and the performance of cellulose, good moisture absorption, air permeability and softness, and is comfortable to wear; the fabric has the characteristics of smoothness, coolness, static resistance and the like, is comfortable, sanitary, unrestrained and fresh to wear, and has the performance beyond that of a plurality of fibers. The fabric is widely applied to the fields of clothes, home textiles, non-woven fabrics and the like. Along with the improvement of the living standard of people and the return of nature in clothes and home decoration, viscose fibers taking natural cellulose as raw materials are certainly driven to develop into novel fibers with high performance, differentiation, functionalization, environmental protection and the like, and the requirements of downstream products on richness and variety are met. But the varieties of the viscose fibers are single at present, mainly conventional varieties, and the development in the fields of non-taking and high-grade application is lacking. With the continuous development of scientific technology, various novel functional viscose fibers taking viscose fibers as a matrix are continuously and successfully developed, and the application market of the viscose fibers is further expanded. The functional viscose fiber can be divided into various types according to the functions, such as flame retardant, antibacterial, negative oxygen ion, far infrared, phase change, ultraviolet resistant, conductive, high adsorption viscose fiber and the like. The limit oxygen index of the common viscose fiber is only 17 percent, and the viscose fiber belongs to inflammable products, so that the production, transportation, use and other aspects of viscose fiber textiles are limited by safety aspects. With the rapid development of viscose fiber industry, research on the flame retardant property thereof is also actively conducted. The flame retardant used for the flame-retardant viscose fiber at present mainly comprises halogen-antimony flame retardants, alkyl or aryl phosphonic acid derivatives, polyphosphonate, phosphazene polymers and the like, organic compounds or inorganic substances containing phosphorus and halogen and the like. These flame retardants have problems of toxicity or environmental pollution, such as corrosive gases, such as hydrogen bromide and hydrogen chloride, easily released from halogen flame retardants, toxic smoke generated during combustion, and the like, and phosphorus inorganic flame retardants easily enter water areas to cause red tide in the ocean. Some silicon-containing environment-friendly flame retardants such as nano-silica and water glass are also adopted, but the silica blocks a spray head in the spinning process due to serious particle agglomeration and wide particle size distribution, so that the spinning quality is greatly reduced, and the water glass cannot be uniformly dispersed in viscose fibers, so that the viscose fibers are flocculated and cannot be spun, so that the problem is not well solved. At present, most of flame-retardant finishing of viscose fibers is a post-finishing method, a dip coating method is generally adopted, the dip coating method has the defects of poor water washing resistance, the spinning quality of the fibers subjected to flame-retardant finishing is also obviously reduced, and a large amount of flame retardants can enter a water phase in the washing process to cause water pollution. The research on flame retardation modification of viscose fibers began in the 80 th 20 th century, and methods such as a blending method and a post-finishing method were tried. The research focus before and after 90 s is a blending method, and the used flame retardant is Sandoflame5060 pyrophosphate organic compound of Sandoz company in Switzerland. But because import fire retardant price is higher, and the fire retardant of production exists that the particle diameter is big, dispersion stability is poor, have great harmful effects scheduling problem to fibre physical and mechanical properties, and the most intensity of current viscose fibre is not high, and elasticity and wearability are relatively poor, warp easily moreover for the surface fabric that weaves and form is not good enough at whole use comfort, and leads to the surface fabric to damage fast, and is not durable.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: aiming at the problem that the conventional viscose fibers are poor in stiffness and strength and often cause damage to fabrics, the preparation method of the viscose fibers with high stiffness is provided.

In order to solve the technical problems, the invention adopts the following technical scheme:

a preparation method of high-stiffness viscose fibers comprises the following steps:

(1) adding a NaOH solution into banana fiber according to a mass ratio of 1: 12 ~ 20 to mix, soaking at room temperature, filtering, collecting filter residues, washing, drying to obtain a dried substance, mixing guar gum, the dried substance, auxiliary materials and water according to a mass ratio of 1: 4 ~ 8: 0.1: 25 ~ 35, pulping to obtain a slurry, adding cassava starch and an additive into the slurry according to a mass ratio of 20: 4 20 ~ 30: 3: 0.4 ~ 0.8.8, mixing and stirring to obtain a mixture;

(2) filtering the mixed material, adding basalt fiber and a ball milling medium into filter residue according to the mass ratio of 5 ~ 8: 1: 0.2, mixing, adding zirconia balls according to the ball material mass ratio of 30 ~ 40: 1, ball milling to obtain ball milling materials, drying the ball milling materials to obtain dried materials, and carrying out plasma treatment on the dried materials at the temperature of 12 ~ 18 ℃ in a nitrogen atmosphere to obtain treated materials for later use;

(3) adding citric acid solution and methylbenzene into p-hydroxymethylbenzaldehyde according to the mass ratio of 1: 12: 4 ~ 7 at 20 ~ 26 ℃, mixing, heating to 50 ~ 60 ℃, adding pyridine accounting for 2 ~ 5 times of the mass of the p-hydroxymethylbenzaldehyde and aniline accounting for 6 ~ 10 times of the mass of the p-hydroxymethylbenzaldehyde, mixing, keeping the temperature, stirring, cooling to obtain a cooling substance, adding reagent A into the cooling substance according to the mass ratio of 5 ~ 8: 18, and mixing to obtain an active agent;

(4) adding D-glucuronic acid into PBS buffer solution according to the mass ratio of 1: 12 ~ 20 to obtain mixed solution, adding mixed enzyme solution into the mixed solution according to the mass ratio of 20 ~ 40: 1 to obtain mixture, stirring and mixing, adding an active agent into the mixture according to the mass ratio of 10 ~ 20: 1 to obtain heat preservation treatment at 20 ~ 25 ℃, discharging and sterilizing to obtain enzyme treatment material, centrifuging the enzyme treatment material, collecting the centrifugate, and freeze-drying to obtain freeze-dried material for later use;

(5) according to the mass parts, taking 20 ~ 35 parts of the treated substance for standby in the step (2), 2 ~ 5 parts of birch juice, 0.2 ~ 0.5.5 parts of sodium bentonite, 1 ~ 4 parts of sodium alginate, 2 ~ 5 parts of carboxymethyl cellulose and 20 ~ 35 parts of water, mixing and stirring the treated substance, the sodium bentonite, the carboxymethyl cellulose and the water at 45 ~ 60 ℃, cooling to 20 ~ 35 ℃, adding the birch juice and the sodium alginate, mixing and stirring to obtain viscose glue solution;

(6) at the temperature of 25 ~ 32 ℃, according to the mass parts, 30 ~ 50 parts of viscose glue solution, 10 ~ 15 parts of standby freeze-dried material, 3 ~ 8 parts of dispersing agent, 1 ~ 3 parts of antioxidant, 7 ~ 12 parts of reagent B and 5 ~ 8 parts of composite reinforcing material are stirred and mixed, the mixture is stood, vacuumized and defoamed, wet spinning is carried out to obtain spinning material, and the spinning material is subjected to heat treatment at the temperature of 90 ~ 110 ℃ to obtain the high-stiffness viscose.

And (2) mixing the auxiliary materials in the step (1) by taking sodium laureth sulfate and hydroxyethyl cellulose according to the mass ratio of 2 ~ 5 to 5: 1 to obtain the auxiliary materials.

And (2) mixing the additive in the step (1) with sodium tripolyphosphate, talcum powder and zinc stearate according to the mass ratio of 1: 3 ~ 7: 1 to obtain the additive.

And (3) mixing the ball milling medium obtained in the step (2) with acetone and ethanol solution according to the mass ratio of 2 ~ 5 to 5: 1 to obtain the ball milling medium.

And (3) mixing the reagent A obtained in the step (3) with ammonium chloride and potassium sulfate solution according to the mass ratio of 1: 6 ~ 10 to obtain the reagent A.

And (3) mixing the mixed enzyme liquid obtained in the step (4) by taking 1 ~ 4 parts of beta-glucosidase, 2 ~ 5 parts of laccase and 500 ~ 700 parts of sterile water according to parts by weight to obtain the mixed enzyme liquid.

And (3) mixing the reagent B obtained in the step (6) with triethylene tetramine and sodium bicarbonate solution according to the mass ratio of 1: 20 ~ 30 to obtain the reagent B.

And (3) mixing the antioxidant obtained in the step (6) with tert-butylhydroquinone and butyl hydroxy anisol according to the mass ratio of 3 ~ 7: 1 to obtain the antioxidant.

And (3) mixing the dispersing agent in the step (6) with alcohol ether phosphate, castor oil polyoxyethylene ether and sodium dodecyl benzene sulfonate according to the mass ratio of 1: 2 ~ 5: 0.2 to obtain the dispersing agent.

And (3) mixing and stirring the hydroxyapatite, the polyethylene glycol and the dichloromethane according to the mass ratio of 1: 4 ~ 8: 50, adding acryloyl chloride accounting for 30 ~ 45% of the mass of the hydroxyapatite and dichloromethane accounting for 5 ~ 8 times of the mass of the hydroxyapatite, mixing, carrying out heat preservation treatment at 30 ~ 45 ℃, carrying out suction filtration, taking filter residues and drying to obtain the composite reinforcing material.

Compared with other methods, the method has the beneficial technical effects that:

(1) the banana fiber alkali soaking viscose fiber is subjected to alkali soaking to remove partial impurities, residual colloid and the like in the fiber, then is blended with guar gum, auxiliary materials and the like, the rotating angle of the microfiber is reduced, the orientation degree is improved, the roughness of the surface of the fiber can be improved, so that the bonding degree and compatibility between the fiber and other macromolecular components are improved, then the fiber is subjected to ball milling and blending with basalt fiber, and through the process of low-temperature plasma treatment, the generated energy can enable bonding among macromolecules to be broken;

(2) the invention uses p-hydroxybenzaldehyde, toluene and the like as active agents, oxidizes the active agents in a catalytic oxidation system through condensation reaction, so that the obtained active agents are rich in a proper amount of carboxyl, can efficiently perform addition reaction with a methylene quinone intermediate in a benzyl ester bond generation process to generate a large amount of benzyl ester bonds, then uses D-glucuronic acid to react with the active agents, uses compound enzyme liquid components for catalytic oxidation, can expose partial active sites, can perform macromolecular modification on the fiber surface, plays a role in adjusting the water absorption swelling performance of viscose fibers through steric hindrance and non-polar effects, can hinder excessive swelling of the fibers, and further ensures that the components of the viscose fibers can reach good balance in the existence of polar group hydrogen bonds and the process of constructing an internal network system, therefore, the internal strength is improved, on the other hand, the exposure of the active sites can have good compatibility with the treated matters after the plasma action, the combination effect in the fiber can also be improved, the stiffness of the viscose fiber is improved, and the fabric can be prevented from being damaged;

(3) according to the invention, sodium bentonite with high water absorption expansibility and viscose glue solution prepared by matching with sodium alginate and the like are subjected to ion exchange to form hydrogel with a three-dimensional network structure, and the combination of the internal bonding effect of the prepared freeze-dried material and the construction aspect of a system structure is combined to play a role in stably improving the stiffness, the expansion and the strength of the fiber component.

Detailed Description

And mixing the alcohol ether phosphate, the castor oil polyoxyethylene ether and the sodium dodecyl benzene sulfonate according to the mass ratio of 1: 2 ~ 5: 0.2 to obtain the dispersing agent.

And (3) mixing the tert-butyl hydroquinone and the butyl hydroxy anisol according to the mass ratio of 3 ~ 7: 1 to obtain the antioxidant.

And (3) mixing the sodium laureth sulfate and the hydroxyethyl cellulose according to the mass ratio of 2 ~ 5: 1 to obtain the auxiliary material.

And (3) mixing the sodium tripolyphosphate, the talcum powder and the zinc stearate according to the mass ratio of 1: 3 ~ 7: 1 to obtain the additive.

And (3) mixing 1 ~ 4 parts of beta-glucosidase, 2 ~ 5 parts of laccase and 500 ~ 700 parts of sterile water according to parts by weight to obtain the mixed enzyme liquid.

And (3) mixing the ball milling medium with acetone and 70% volume fraction ethanol solution according to the mass ratio of 2 ~ 5: 1 to obtain the ball milling medium.

And mixing the reagent A with ammonium chloride and 15 mass percent potassium sulfate solution according to the mass ratio of 1: 6 ~ 10 to obtain the reagent A.

And mixing the reagent B with triethylene tetramine and a sodium bicarbonate solution with the mass fraction of 20% according to the mass ratio of 1: 20 ~ 30 to obtain the reagent B.

And (2) mixing hydroxyapatite, polyethylene glycol and dichloromethane in an ice water bath according to the mass ratio of 1: 4 ~ 8: 50, magnetically stirring for 35 ~ 60min at 400 ~ 700r/min, adding acryloyl chloride accounting for 30 ~ 45% of the mass of the hydroxyapatite and dichloromethane accounting for 5 ~ 8 times of the mass of the hydroxyapatite, mixing, carrying out heat preservation treatment for 20 ~ 24 hours at 30 ~ 45 ℃, carrying out suction filtration, and drying filter residues in an oven at 55 ~ 70 ℃ to obtain the composite reinforcing material.

And mixing to obtain the composite reinforcing material.

A preparation method of high-stiffness viscose fibers comprises the following steps:

(1) adding 15% NaOH solution into banana fiber according to the mass ratio of 1: 12 ~ 20 to mix, soaking at room temperature for 3 ~ 5h, filtering, collecting filter residue, washing with water for 2 ~ 4 times, transferring to a drying box, drying at 55 ~ 70 and 70 ℃ for 3 ~ 5h to obtain a dried substance, mixing guar gum, the dried substance, auxiliary materials and water in a reaction kettle according to the mass ratio of 1: 4 ~ 8: 0.1: 25 ~ 35 to obtain a slurry, pulping at 400 ~ 700/min for 1 ~ 3h to obtain a slurry, adding tapioca starch and additives into the slurry according to the mass ratio of 20 ~ 30: 3: 0.4 ~ 0.8.8 to mix, and magnetically stirring at 1000 ~ 1200r/min for 40 ~ 60min to obtain a mixture;

(2) filtering the mixture, adding filter residue into basalt fiber and ball milling medium which are sieved by a 120-mesh sieve according to the mass ratio of 5 ~ 8: 1: 0.2, mixing in a ball milling tank, adding zirconia ball milling beads according to the mass ratio of 30 ~ 40: 1, and carrying out ball milling for 2 ~ 4h at the speed of 350 ~ 550r/min to obtain ball milling materials, drying the ball milling materials in an oven at the temperature of 60 ~ 80 ℃ for 4 ~ 8h to obtain dried materials, placing the dried materials in a quartz reaction cavity, carrying out plasma treatment for 20 ~ 35min at the power of 500 ~ 88W at the temperature of 12 ~ 18 ℃ under the nitrogen atmosphere to obtain treated materials for later use;

(3) adding 20% by mass of citric acid solution and toluene into p-hydroxymethylbenzaldehyde at the temperature of 20 ~ 26 ℃ according to the mass ratio of 1: 12: 4 ~ 7, mixing, heating to 50 ~ 60 ℃, adding pyridine accounting for 2 ~ 5 times of the mass of the p-hydroxymethylbenzaldehyde and aniline accounting for 6 ~ 10 times of the mass of the p-hydroxymethylbenzaldehyde, mixing, keeping the temperature at 500 ~ 800r/min, stirring for 35 ~ 60min, naturally cooling to room temperature to obtain a cooling object, adding a reagent A into the cooling object according to the mass ratio of 5 ~ 8: 18, and mixing to obtain an active agent;

(4) adding D-glucuronic acid into PBS buffer solution with pH of 7.2 ~ 7.6.6 according to the mass ratio of 1: 12 ~ 20 to mix for 25 ~ 45min to obtain mixed solution, adding mixed enzyme solution into the mixed solution according to the mass ratio of 20 ~ 40: 1 in a sterile environment to stir and mix to obtain a mixture, adding an active agent into the mixture according to the mass ratio of 10 ~ 20: 1 to perform heat preservation treatment at 20 ~ 25 ℃ for 3 ~ 6 days, discharging, heating to 90 ~ 100 ℃ for 12 ~ 25min after heat preservation and sterilization to obtain an enzyme treatment material, centrifuging the enzyme treatment material in a centrifuge at 3000 ~ 5000r/min for 12 ~ 25min, collecting the centrifugate, and treating the centrifugate in a freeze dryer at-15 ~ -10 ℃ for 4 ~ 8h to obtain a freeze-dried material for later use;

(5) according to the mass parts, taking 20 ~ 35 parts of the treated substance for standby in the step (2), 2 ~ 5 parts of birch juice, 0.2 ~ 0.5.5 parts of sodium bentonite, 1 ~ 4 parts of sodium alginate, 2 ~ 5 parts of carboxymethyl cellulose and 20 ~ 35 parts of water, mixing the treated substance, the sodium bentonite, the carboxymethyl cellulose and the water in a reaction kettle at 45 ~ 60 ℃, magnetically stirring for 40 ~ 60min at 500 ~ 800r/min, cooling to 20 ~ 35 ℃, adding the birch juice and the sodium alginate for mixing, magnetically stirring for 40 ~ 60min at 2000 ~ 4000r/min, and obtaining viscose glue solution;

(6) at the temperature of 25 ~ 32 ℃, according to the mass parts, 30 ~ 50 parts of viscose glue solution, 10 ~ 15 parts of standby freeze-dried material, 3 ~ 8 parts of dispersing agent, 1 ~ 3 parts of antioxidant, 7 ~ 12 parts of reagent B and 5 ~ 8 parts of composite reinforcing material are stirred, mixed and stirred in a reaction kettle for 2 ~ 4h, the mixture is vacuumized at room temperature, kept stand and defoamed for 20 ~ 24h, and then transferred to a spinning machine for wet spinning to obtain spinning material, and the spinning material is taken to be thermally treated at the temperature of 90 ~ 110 ℃ for 3 ~ 5h to obtain the viscose fiber with high stiffness.