A high modulus water-washable antibacterial cotton yarn

Abstract

The present invention relates to a high modulus water-washable antibacterial cotton yarn, belonging to the technical field of functional cotton yarns. It is obtained by blending high modulus fibers and cotton fibers and treating them with an antibacterial liquid. The specific preparation steps are as follows: The high modulus fibers and cotton fibers are opened according to the mass ratio; the opened fibers are mixed and processed into a uniform cotton lap after impurity removal, carded, and drawn, and then the cotton yarn is obtained by vortex spinning; then the cotton yarn is placed in the antibacterial treatment liquid and dip-rolled twice; the antibacterial treatment liquid is prepared through the following steps: Mix 50-100 g of waterborne polyurethane, 0.1-2 g of penetrant, 30 g of modified polyguanidine antibacterial agent, 5-10 g of auxiliary components, 10-20 g of additives and 1 L of deionized water evenly to obtain it; the antibacterial treatment liquid is based on waterborne polyurethane and is obtained by adding a modified polyguanidine antibacterial agent and auxiliary components. The treated cotton yarn not only has high antibacterial performance but also has good water resistance effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of functional cotton yarns, and particularly relates to a high-modulus water-washable antibacterial cotton yarn. Background Art

[0002] Cotton yarn is made of cotton fibers and auxiliary fibers through a spinning process. After being plied, it is called cotton thread. According to different spinning processes, it can be divided into carded yarn and combed yarn. By blending with high-modulus fibers (such as ultra-high molecular weight polyethylene fibers or aramid), high-modulus cotton yarn can be obtained, which has high mechanical strength and a long service life and can be used to make medical cotton yarn. The main functions of traditional medical cotton yarn are to absorb blood and isolate the wound surface, but it does not have antibacterial function and cannot meet the current medical needs. In order to endow it with antibacterial properties, it is treated with a treatment liquid, and an antibacterial agent is usually added to the treatment liquid. However, the antibacterial effect obtained by this treatment method is poor. First, the interaction between the antibacterial agent and the cotton yarn raw material is poor, and they are only combined by hydrogen bonds or van der Waals forces and are not resistant to water washing. Second, the molecular weight of the antibacterial agent is low, and it is easy to migrate and precipitate under high temperature or high humidity conditions, resulting in a decrease in antibacterial performance. Third, the antibacterial effect is single, and bacteria are prone to produce drug resistance, thus losing antibacterial performance. Therefore, it is necessary to provide a high-modulus water-washable antibacterial cotton yarn. Summary of the Invention

[0003] In order to solve the technical problems mentioned in the background art, the present invention provides a high-modulus water-washable antibacterial cotton yarn.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A high-modulus water-washable antibacterial cotton yarn is obtained by blending high-modulus fibers and cotton fibers and treating them with an antibacterial liquid. The specific preparation steps are as follows:

[0006] First step: Add high-modulus fibers and cotton fibers to a carding machine according to a mass ratio of 15-30:70-85, and carry out carding according to the principle of "low-speed carding, less beating, less dropping, and anti-sticking roll".

[0007] Second step: After removing impurities from the carded fibers, mix and process them into a uniform cotton lap for use in a comber. Control the delivery speed of the comber to be 70-80 m / min, the flat belt speed to be 85-90 mm / min, and the draft multiple to be 78-85.

[0008] Third step: Carry out drawing on the carded cotton lap, and obtain cotton yarn through vortex spinning. The spinning speed is 335-345 r / min, and the total draft multiple is 185-190.

[0009] Step 4: Place the cotton yarn in the antibacterial treatment solution, dip and roll it twice to make the liquid pickup rate 70 - 80%, dry it at 75 - 85°C for 3 - 10 min, and bake it at 150 - 170°C for 1.5 - 3 min to obtain high - modulus wash - resistant antibacterial cotton yarn.

[0010] Furthermore, the high - modulus fiber is ultra - high - molecular - weight polyethylene fiber or aramid.

[0011] Furthermore, the antibacterial treatment solution is prepared through the following steps:

[0012] Mix water - based polyurethane, penetrant, modified polyguanidine antibacterial agent, auxiliary components, additives and deionized water evenly according to the dosage ratio of 50 - 100 g: 0.1 - 2 g: 30 g: 5 - 10 g: 10 - 20 g: 1 L to obtain the antibacterial treatment solution.

[0013] Furthermore, the solid content of the water - based polyurethane is 30 - 50%.

[0014] Furthermore, the modified polyguanidine antibacterial agent is prepared through the following steps:

[0015] Step S11: Add chloroform, octavinyl - POSS, acetic acid and concentrated sulfuric acid into a flask, stir and heat up to 60°C, dropwise add hydrogen peroxide. After the dropping is completed, heat up to reflux and react for 18 h. After the reaction is completed, remove the upper - layer liquid by liquid separation. Wash the obtained lower - layer liquid repeatedly with saturated sodium bicarbonate solution and deionized water to remove the aqueous phase. Volatilize it at room temperature for 12 h, and remove chloroform by rotary evaporation at 62°C to obtain epoxy - POSS;

[0016] Among them, the dosage ratio of chloroform, octavinyl - POSS, acetic acid, concentrated sulfuric acid and hydrogen peroxide is 100 - 110 mL: 6 g: 25 mL: 0.8 - 1 mL: 50 - 60 mL. The mass fraction of concentrated sulfuric acid is 95%, and the mass fraction of hydrogen peroxide is 30%. Under the action of concentrated sulfuric acid and hydrogen peroxide, the vinyl group of octavinyl - POSS is converted into an epoxy group to obtain epoxy - POSS;

[0017] Step S12: Add polyhexamethylene guanidine hydrochloride into a flask, add dimethyl sulfoxide, dissolve it with ultrasonic assistance, add epoxy - POSS, and react at 50°C for 2 - 3 h. After the reaction is completed, slowly pour the reaction mixture into acetone. Flocculent precipitation appears, centrifuge, and dry the precipitate to obtain the modified polyguanidine antibacterial agent;

[0018] Among them, the dosage ratio of polyhexamethylene guanidine hydrochloride, dimethyl sulfoxide, epoxy-POSS and acetone is 1.89 g: 10 - 15 mL: 1.32 - 1.35 g: 100 - 150 mL. The weight-average molecular weight of polyhexamethylene guanidine hydrochloride is 8200 g / mol. By using the amino group of polyhexamethylene guanidine hydrochloride to carry out a ring-opening reaction with the epoxy group of epoxy-POSS, polyhexamethylene guanidine hydrochloride is grafted onto epoxy-POSS to obtain a modified polyguanidine antibacterial agent.

[0019] Furthermore, the auxiliary component is prepared through the following steps:

[0020] Step S21: Place alkali lignin in a three-necked flask, add DMF solvent, stir to dissolve and then vacuum to remove the air in the solution. Under a nitrogen atmosphere, heat to 150 °C and stir for reaction. Add iodocyclohexane, keep the temperature for reaction for 12 h. After the reaction is completed, cool to room temperature, add n-hexane, stir and then let it stand for layering. Remove the upper layer liquid, add saturated sodium metabisulfite solution, precipitate, filter by suction, and freeze-dry to obtain an intermediate product. In step S21, the dosage ratio of alkali lignin, DMF and iodocyclohexane is 3.0 g: 23 - 25 mL: 12 mL;

[0021] Step S22: Add the intermediate product and silver oxide to DMF, stir and react at room temperature for 12 - 16 h to obtain the auxiliary component; the dosage ratio of the intermediate product, silver oxide and DMF is 1 g: 4 - 5 g: 50 - 60 mL.

[0022] Through the demethylation of iodocyclohexane on alkali lignin, the phenolic hydroxyl content of lignin is increased to improve the reaction activity of lignin to obtain an intermediate product. Using the numerous phenolic hydroxyl groups of the intermediate product as a reducing agent for silver source, and using the three-dimensional spatial structure of the intermediate product to play a role in stabilizing and dispersing silver nanoparticles, inhibiting the aggregation of silver nanoparticles, to obtain the auxiliary component.

[0023] Furthermore, the penetrant is one of penetrant JFC, penetrant M and penetrant T.

[0024] Furthermore, the auxiliary agent is composed of one or more of tetra-isobutyl titanate, zinc naphthenate and iron octoate in any proportion.

[0025] The beneficial effects of the present invention:

[0026] Aiming at the problem of poor water resistance and antibacterial property of existing cotton yarns, the present invention provides a high modulus water-washable antibacterial cotton yarn, which is obtained by treating with an antibacterial treatment liquid. Notably, the antibacterial treatment liquid of the present invention uses waterborne polyurethane as the base material and is obtained by adding a modified polyguanidine antibacterial agent and auxiliary components. The modified polyguanidine antibacterial agent is obtained by a chemical reaction of epoxy-POSS and polyhexamethylene guanidine hydrochloride, and has active epoxy groups, a nano-POSS structure and an antibacterial guanidine structure. The presence of the active epoxy groups enables the POSS structure with nano-size effect and the antibacterial guanidine structure to be introduced onto the surface of the cotton yarn in the form of chemical bonds (the epoxy groups react with the hydroxyl groups on the fiber surface, and the isocyanate groups in the polyurethane react with the hydroxyl groups or epoxy groups), improving the adhesion between the antibacterial guanidine structure and the cotton yarn. The introduced POSS structure with nano-size effect will form an uneven rough surface during the curing process of the antibacterial treatment liquid. Based on the hydrophobicity of silicone, a hydrophobic film is formed on the surface of the cotton yarn to improve the water-washable performance of the cotton yarn, and further improve the water-washable antibacterial performance. The auxiliary components contain a lignin composite structure with nano-silver antibacterial particles. When added to the polyurethane system, since lignin is a substance containing aromatic rings and numerous functional groups (hydroxyl groups, phenolic hydroxyl groups and carboxyl groups), it can not only stabilize the nano-silver and reduce the water-wash shedding of the nano-silver, but also participate in the curing reaction of the polyurethane and act as a reinforcing agent to improve the mechanical properties, thermal stability and antioxidant properties. Detailed Embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0028] Example 1

[0029] The modified polyguanidine antibacterial agent is prepared through the following steps:

[0030] Step S11: Add 100 mL of chloroform, 6 g of octavinyl-POSS, 25 mL of acetic acid and 0.8 mL of concentrated sulfuric acid into a flask, stir and heat up to 60 °C, dropwise add 50 mL of hydrogen peroxide. After the dropping is completed, heat up to reflux and react for 18 h. After the reaction is completed, remove the upper layer liquid by liquid separation. The obtained lower layer liquid is repeatedly washed with saturated sodium bicarbonate solution and deionized water to remove the aqueous phase, volatilize at room temperature for 12 h, and remove chloroform by rotary evaporation at 62 °C to obtain epoxy-POSS. The mass fraction of concentrated sulfuric acid is 95%, and the mass fraction of hydrogen peroxide is 30%;

[0031] Step S12: Add 1.89 g of polyhexamethylene guanidine hydrochloride into a flask, add 10 mL of dimethyl sulfoxide, dissolve it with ultrasonic assistance, add 1.32 g of epoxy-POSS, react at 50 °C for 2 h. After the reaction is completed, slowly pour the reaction mixture into 100 mL of acetone. Flocculent precipitates appear. Centrifuge and dry the precipitate to obtain the modified polyguanidine antibacterial agent.

[0032] Example 2

[0033] The modified polyguanidine antibacterial agent is prepared through the following steps:

[0034] Step S11: Add 110 mL of chloroform, 6 g of octavinyl-POSS, 25 mL of acetic acid and 1 mL of concentrated sulfuric acid into a flask, stir and heat up to 60 °C, dropwise add 60 mL of hydrogen peroxide. After the dropping is completed, heat up to reflux and react for 18 h. After the reaction is completed, remove the upper layer of liquid by liquid separation. Wash the obtained lower layer of liquid repeatedly with saturated sodium bicarbonate solution and deionized water to remove the aqueous phase. Volatilize at room temperature for 12 h, and remove chloroform by rotary evaporation at 62 °C to obtain epoxy-POSS. The mass fraction of concentrated sulfuric acid is 95%, and the mass fraction of hydrogen peroxide is 30%;

[0035] Step S12: Add 1.89 g of polyhexamethylene guanidine hydrochloride into a flask, add 15 mL of dimethyl sulfoxide, dissolve it with ultrasonic assistance, add 1.35 g of epoxy-POSS, react at 50 °C for 3 h. After the reaction is completed, slowly pour the reaction mixture into 150 mL of acetone. Flocculent precipitates appear. Centrifuge and dry the precipitate to obtain the modified polyguanidine antibacterial agent.

[0036] Example 3

[0037] A high-modulus and wash-resistant antibacterial cotton yarn is obtained by blending high-modulus fibers and cotton fibers and treating them with an antibacterial liquid. The specific preparation steps are as follows:

[0038] First step: Add high-modulus fibers and cotton fibers into a carding machine according to a mass ratio of 15:70 respectively, and carry out carding according to the principle of "low-speed carding, less beating, less dropping, and anti-sticking roll";

[0039] Second step: After removing impurities from the carded fibers, mix and process them into a uniform cotton lap for use in a comber. Control the delivery speed of the comber to be 70 m / min, the flat speed to be 85 mm / min, and the draft multiple to be 78;

[0040] Third step: Carry out drawing treatment on the carded cotton lap, and obtain cotton yarn through vortex spinning. The spinning speed is 335 r / min, and the total draft multiple is 185;

[0041] Fourth step: Place the cotton yarn in an antibacterial treatment liquid, dip and roll it twice to make the liquor pickup rate 70%, dry it at 75 °C for 3 min, and bake it at 150 °C for 1.5 min to obtain the high-modulus and wash-resistant antibacterial cotton yarn.

[0042] Among them, the high-modulus fiber is ultra-high molecular weight polyethylene fiber.

[0043] The antibacterial treatment liquid is prepared through the following steps:

[0044] Mix 50 g of waterborne polyurethane, 0.1 g of penetrant JFC, 30 g of modified polyguanidine antibacterial agent, 5 g of auxiliary component, 10 g of tetra-isobutyl titanate and 1 L of deionized water evenly, and the antibacterial treatment liquid is obtained. The waterborne polyurethane is a commercially available product, such as PU-3541 purchased from Guangzhou Hengsike New Materials Co., Ltd., and the number average molecular weight is 5000 - 20000.

[0045] The auxiliary component is prepared through the following steps:

[0046] Step S21: Place 3.0 g of alkali lignin in a three-necked flask, add 23 mL of DMF solvent, stir to dissolve and then vacuum to remove the air in the solution. Under a nitrogen atmosphere, heat to 150 °C and stir for reaction, add 12 mL of iodocyclohexane, keep the temperature for reaction for 12 h. After the reaction is completed, cool to room temperature, add n-hexane, stir and then let it stand for layering. Remove the upper liquid, add saturated sodium metabisulfite solution, precipitate, filter by suction, and freeze-dry to obtain an intermediate product;

[0047] Step S22: Add 1 g of the intermediate product and 4 g of silver oxide to 50 mL of DMF, and stir for reaction at room temperature for 12 h to obtain the auxiliary component.

[0048] Example 4

[0049] A high-modulus water-washable antibacterial cotton yarn is obtained by blending high-modulus fiber and cotton fiber and treating with an antibacterial liquid. The specific preparation steps are as follows:

[0050] First step: Add high-modulus fiber and cotton fiber into a bale opener according to a mass ratio of 20:75 respectively, and carry out opening according to the principle of "low-speed opening, less beating, less dropping, and anti-sticking roll";

[0051] Second step: After removing impurities from the opened fibers, mix and process them into a uniform cotton lap for use in a carding machine. Control the draw-off speed of the carding machine to be 75 m / min, the flat belt speed to be 88 mm / min, and the draft multiple to be 80;

[0052] Third step: Carry out drawing treatment on the carded cotton lap, and obtain cotton yarn through vortex spinning. The spinning speed is 340 r / min, and the total draft multiple is 188;

[0053] Fourth step: Place the cotton yarn in the antibacterial treatment liquid, dip and roll twice to make the liquid pickup rate 75%, dry at 80 °C for 5 min, and bake at 160 °C for 2 min to obtain the high-modulus water-washable antibacterial cotton yarn.

[0054] Among them, the high-modulus fiber is ultra-high molecular weight polyethylene fiber.

[0055] The antibacterial treatment liquid is prepared through the following steps:

[0056] Mix 60 g of aqueous polyurethane, 0.5 g of penetrant M, 30 g of modified polyguanidine antibacterial agent, auxiliary components, 15 g of iron octanoate and 1 L of deionized water evenly, and the antibacterial treatment liquid is obtained. The aqueous polyurethane is a commercially available product, such as PU-3541 purchased from Guangzhou Hengsike New Materials Co., Ltd., and the number average molecular weight is 5000 - 20000.

[0057] The auxiliary components are prepared through the following steps:

[0058] Step S21: Place 3.0 g of alkali lignin in a three-necked flask, add 24 mL of DMF solvent, stir to dissolve and then evacuate to remove the air in the solution. Under a nitrogen atmosphere, heat to 150 °C and stir for reaction. Add 12 mL of iodocyclohexane, keep the temperature for reaction for 12 h. After the reaction is completed, cool to room temperature, add n-hexane, stir and then let it stand for stratification. Remove the upper layer of liquid, add saturated sodium metabisulfite solution, precipitate, filter by suction, and freeze-dry to obtain an intermediate product;

[0059] Step S22: Add 1 g of the intermediate product and 4.5 g of silver oxide to 55 mL of DMF, and stir for reaction at room temperature for 14 h to obtain the auxiliary components.

[0060] Example 5

[0061] A high-modulus washable antibacterial cotton yarn is obtained by blending high-modulus fibers and cotton fibers and treating them with an antibacterial liquid. The specific preparation steps are as follows:

[0062] First step: Add high-modulus fibers and cotton fibers into the opener according to a mass ratio of 30:70 respectively, and carry out opening according to the principle of "low-speed opening, less beating, less dropping, and anti-sticking roll";

[0063] Second step: After removing impurities from the opened fibers, mix and process them into a uniform cotton roll for use in the carding machine. Control the carding machine's delivery speed at 80 m / min, the flat belt speed at 90 mm / min, and the draft multiple at 85;

[0064] Third step: Carry out drawing treatment on the carded cotton roll, and obtain cotton yarn through vortex spinning. The spinning speed is 345 r / min, and the total draft multiple is 190;

[0065] Fourth step: Place the cotton yarn in the antibacterial treatment liquid, dip and roll it twice to make the liquor pickup rate 80%, dry it at 85 °C for 10 min, and bake it at 170 °C for 3 min to obtain the high-modulus washable antibacterial cotton yarn.

[0066] Among them, the high-modulus fiber is ultra-high molecular weight polyethylene fiber.

[0067] The antibacterial treatment liquid is prepared through the following steps:

[0068] Mix 100 g of waterborne polyurethane, 2 g of penetrant M, 30 g of modified polyguanidine antibacterial agent, 10 g of auxiliary component, 20 g of zinc naphthenate and 1 L of deionized water evenly, and the antibacterial treatment liquid is obtained. The waterborne polyurethane is a commercially available product, such as PU-3541 purchased from Guangzhou Hengsike New Materials Co., Ltd., and the number average molecular weight is 5000-20000.

[0069] The auxiliary component is prepared through the following steps:

[0070] Step S21: Place 3.0 g of alkali lignin in a three-necked flask, add 25 mL of DMF solvent, stir to dissolve and then vacuum to remove the air in the solution. Under a nitrogen atmosphere, heat to 150 °C and stir for reaction, add 12 mL of iodocyclohexane, keep the temperature for reaction for 12 h. After the reaction is completed, cool to room temperature, add n-hexane, stir and then let it stand for layering. Remove the upper layer liquid, add saturated sodium metabisulfite solution, precipitate, filter by suction, and freeze-dry to obtain an intermediate product;

[0071] Step S22: Add 1 g of the intermediate product and 5 g of silver oxide to 60 mL of DMF, and stir for reaction at room temperature for 16 h to obtain the auxiliary component.

[0072] Comparative Example 1

[0073] Compared with Example 3, the modified polyguanidine antibacterial agent in Example 3 was removed, and the remaining raw materials and preparation process were the same as those in Example 3.

[0074] Comparative Example 2

[0075] Compared with Example 3, the auxiliary component in Example 3 was removed, and the remaining raw materials and preparation process were the same as those in Example 3.

[0076] The high-modulus wash-resistant antibacterial cotton yarns prepared in Examples 3-5 and Comparative Examples 1-2 were tested. The antibacterial performance was tested according to GB / T20944.3-2008. According to the test condition A1 M in GB / T 12490-2014 "Textiles - Tests for colour fastness - Colour fastness to domestic and commercial laundering", the antibacterial cotton fabric was washed 50 times, and then the antibacterial performance was tested according to the above method. The test results are shown in Table 1:

[0077] Table 1

[0078]

[0079] As can be seen from Table 1, compared with Comparative Examples 1-2, the cotton yarns prepared in Examples 3-5 not only have excellent antibacterial properties but also high wash resistance.

[0080] In the description of the specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0081] The above content is only an example and illustration of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar ways to replace them. As long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

Claims

1. A high-modulus water-washable antibacterial cotton yarn, characterized in that, it is obtained by blending high-modulus fibers and cotton fibers and treating with an antibacterial liquid. The specific preparation steps are as follows: First step: Open the high-modulus fibers and cotton fibers according to a mass ratio of 15 - 30:70 - 85; Second step: After removing impurities from the opened fibers, mix and process them into a uniform cotton lap, and then card the cotton; Third step: Draw the carded cotton lap, and then obtain cotton yarn through vortex spinning; Fourth step: Place the cotton yarn in the antibacterial treatment liquid, dip and roll it twice, so that the liquid uptake rate is 70 - 80%, dry it at 75 - 85°C for 3 - 10 min, and bake it at 150 - 170°C for 1.5 - 3 min; The antibacterial treatment liquid is prepared through the following steps: Mix waterborne polyurethane, penetrant, modified polyguanidine antibacterial agent, auxiliary component, auxiliary agent and deionized water according to a dosage ratio of 50 - 100 g:0.1 - 2 g:30 g:5 - 10 g:10 - 20 g:1 L uniformly to obtain the antibacterial treatment liquid; The modified polyguanidine antibacterial agent is prepared through the following steps: Step S11: Mix chloroform, octavinyl-POSS, acetic acid and concentrated sulfuric acid, add hydrogen peroxide dropwise at 60°C, after the dropwise addition, carry out reflux reaction for 18 h, and perform post-treatment to obtain epoxy-POSS; Step S12: Mix polyhexamethylene guanidine hydrochloride and dimethyl sulfoxide, add epoxy-POSS, react at 50°C for 2 - 3 h, after the reaction ends, slowly pour the reaction product into acetone, flocculent precipitation appears, centrifuge, and dry the precipitate to obtain the modified polyguanidine antibacterial agent; The auxiliary component is prepared through the following steps: Step S21: Add alkali lignin to DMF, under a nitrogen atmosphere, raise the temperature to 150°C and stir to react, add iodocyclohexane, keep the temperature and react for 12 h, and perform post-treatment to obtain an intermediate product; Step S22: Add the intermediate product and silver oxide to DMF, stir and react at room temperature for 12 - 16 h to obtain the auxiliary component.

2. A high-modulus water-washable antibacterial cotton yarn according to claim 1, characterized in that, in step S11, the dosage ratio of chloroform, octavinyl-POSS, acetic acid, concentrated sulfuric acid and hydrogen peroxide is 100 - 110 mL:6 g:25 mL:0.8 - 1 mL:50 - 60 mL, the mass fraction of concentrated sulfuric acid is 95%, and the mass fraction of hydrogen peroxide is 30%.

3. A high-modulus water-washable antibacterial cotton yarn according to claim 1, characterized in that, in step S12, the dosage ratio of polyhexamethylene guanidine hydrochloride, dimethyl sulfoxide, epoxy-POSS and acetone is 1.89 g:10 - 15 mL:1.32 - 1.35 g:100 - 150 mL, and the weight-average molecular weight of polyhexamethylene guanidine hydrochloride is 8200 g / mol.

4. A high-modulus water-washable antibacterial cotton yarn according to claim 1, characterized in that, in step S21, the dosage ratio of alkali lignin, DMF and iodocyclohexane is 3.0 g:23 - 25 mL:12 mL.

5. A high-modulus water-washable antibacterial cotton yarn according to claim 1, characterized in that, In step S22, the dosage ratio of the intermediate product, silver oxide and DMF is 1 g: 4 - 5 g: 50 - 60 mL.

6. A high modulus water-washable antibacterial cotton yarn according to claim 1, characterized in that the auxiliary agent is composed of one or more of tetra-isobutyl titanate, zinc naphthenate and iron octoate in any proportion.

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