Second-absorption quick-drying cotton-like seaweed carbon fiber material and preparation method thereof

Abstract

The invention discloses a second-absorption quick-dry cotton-like seaweed carbon fiber material and a preparation method thereof, and relates to the technical field of seaweed carbon fiber materials, the second-absorption quick-dry cotton-like seaweed carbon fiber material is prepared from the following raw materials by weight: 15-25 parts of seaweed carbon fiber, 40-60 parts of modified polyester, 45-65 parts of an antibacterial liquid, and 20-30 parts of a hydrophilic polyurethane emulsion. According to the second-absorption quick-drying cotton-like seaweed carbon fiber material and the preparation method thereof, a natural porous structure is provided through seaweed carbon fibers, and the material is endowed with excellent moisture absorption capacity; by introducing a modified polyester sulfonic acid group (-SO3Na) and a hydrophilic polyether chain segment, the surface energy is improved, the hydrophilicity of the fiber is improved, meanwhile, the seaweed carbon fiber serves as a functional phase and forms a synergistic effect with polyester through interface bonding, and the mechanical property of the fiber is effectively improved; through alkali treatment, micro-grooves are formed in the fiber surface, the surface area is increased, the natural rough structure of cotton fiber is simulated, and the hygroscopicity and hand feeling are improved.

Description

Technical Field

[0001] The invention relates to the technical field of seaweed carbon fiber materials, in particular to a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material and a preparation method thereof. Background Art

[0002] Seaweed carbon fiber is made by pulverizing the carbonized seaweed charcoal into ultrafine particles, then mixing it with a polyester or nylon solution for spinning and spinning. This fiber can be blended with natural cotton or other fibers to create yarns that emit far-infrared radiation. When used in textiles and nonwovens, these products can achieve the combined effects of far-infrared radiation, negative ions, thermal insulation, health benefits, antibacterial properties, and deodorization.

[0003] However, seaweed carbon fiber itself has low strength (breaking strength <200MPa), is brittle, and is difficult to fiberize alone. It needs to be blended with other fibers. In addition, some hydrophilic groups are destroyed during the carbonization process of seaweed carbon fiber, resulting in limited moisture absorption rate and moisture diffusion capacity, requiring further modification. To this end, the present invention provides a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material and a preparation method thereof to solve the above-mentioned problems. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material and a preparation method thereof, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a fast-absorbing and quick-drying cotton-like seaweed carbon fiber material is prepared from the following raw materials in parts by weight: 15-25 parts by weight of seaweed carbon fiber, 40-60 parts by weight of modified polyester, 45-65 parts by weight of antibacterial liquid, and 20-30 parts of hydrophilic polyurethane emulsion; The preparation method of the antibacterial liquid is as follows: 3-allyl-5,5-dimethylhydantoin and potassium persulfate are dissolved in deionized water under N2 atmosphere. After complete dissolution, the temperature is raised to 75-80°C, methyl methacrylate is slowly added dropwise, and after the reaction is carried out for 12 hours, the reaction product is centrifuged, washed, and dried in sequence to obtain the antibacterial liquid.

[0006] Preferably, the mass of the potassium persulfate and the mass of the methyl methacrylate are 148%-157% and 164%-172% of the mass of 3-allyl-5,5-dimethylhydantoin, respectively.

[0007] Preferably, the reaction product is washed by centrifugation 3-5 times and dried under vacuum conditions at 45-50° C. for 24 hours.

[0008] Preferably, the specific preparation method of the 3-allyl-5,5-dimethylhydantoin is as follows: under N2, potassium hydroxide and 5,5-dimethylhydantoin are completely dissolved in ultrapure water, allyl bromide is added, the mixture is reacted at 60-70°C for 3 hours, and then naturally cooled. The reaction product is extracted, rotary evaporated, purified, and dried in sequence to obtain 3-allyl-5,5-dimethylhydantoin.

[0009] Preferably, the amount of 5,5-dimethylhydantoin is 2.8-3.25 parts by weight, the amount of potassium hydroxide is 3.4-3.7 parts by weight, the amount of ultrapure water is 25 parts by weight, and the amount of allyl bromide is 6.12-6.35 parts by weight.

[0010] Preferably, 40 mL of dichloromethane is used for extraction, petroleum ether is used for purification, and vacuum drying is performed at 45-50° C. for 12 h.

[0011] Preferably, the preparation method of the modified polyester is: (1) Dissolve 3-5 g of a mixture of dimethyl isophthalate-5-sodium sulfonate and 5-8 g of polyethylene glycol ether in 8-15 g of ethylene glycol at 60°C to obtain a mixed solution; (2) Mix 80-85g of terephthalic acid, 35-40g of ethylene glycol, and 0.05g of ethylene glycol antimony, heat to 220-240℃, react at normal pressure for 1-2h, add the mixed solution, and add 5-8g of ethylene glycol at the same time, heat to 240-260℃, pressure 0.3-0.5MPa, and react for 2-3h to obtain modified polyester.

[0012] Preferably, the preparation of the modified polyester further comprises: continuing to heat to 270-280° C., reducing the pressure to below 100 Pa, adding 2-4 g of triphenyl phosphate, stirring for 30 min, reacting for 3-5 h, then adding 0.05 g of ethylene glycol antimony, and continuing the reaction for 1 h to obtain the modified polyester.

[0013] A method for preparing a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material comprises the following steps: Step 1: Pretreatment of seaweed: Place the seaweed carbon fiber in deionized water, ultrasonically clean it at 60°C for 15 minutes to remove surface impurities, and then dry it in an oven at 80°C for 2 hours; Step 2: Spinning: Add the modified polyester into a twin-screw extruder at a melt temperature of 260-280°C and a screw speed of 150-200 r / min to obtain a modified polyester melt; Step 3: Fiber forming: The seaweed carbon fiber and the modified polyester melt are extruded from different spinnerets to form parallel composite fibers. The spinneret temperature is 250-260°C, the cooling wind speed is 1.5-2.0 m / s, and then the fibers are hot-stretched in a drawing machine with a drawing ratio of 2.5-3.0 times and a drawing temperature of 90-100°C. Step 4: Alkali treatment: immerse the fiber in 5%-8% NaOH solution at 60-70℃ for 20-30min; Step 5: Impregnation treatment: Use hydrophilic polyurethane emulsion with a solid content of 5%-8% for padding finishing, bake at 150°C for 5 minutes, then immerse the fiber in an antibacterial solution at 60°C for 1 hour, and then dry at 100°C to obtain a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material.

[0014] Beneficial effects The present invention provides a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material and its preparation method. Compared with the existing technology, it has the following advantages: (1) The instant-absorbing and quick-drying cotton-like seaweed carbon fiber material and its preparation method provide a natural porous structure through seaweed carbon fiber, giving the material excellent moisture absorption capacity; by introducing modified polyester sulfonic acid groups (-SO3Na) and hydrophilic polyether segments, the surface energy is increased and the hydrophilicity of the fiber is improved. At the same time, the seaweed carbon fiber, as a functional phase, forms a synergistic effect with polyester through interfacial bonding, effectively improving the mechanical properties of the fiber; through alkali treatment, micro grooves are formed on the fiber surface, increasing its surface area, simulating the natural rough structure of cotton fiber, improving moisture absorption and feel, and the grooves on the fiber surface and the internal carbon fiber pores form a three-dimensional adsorption network, which can load functional substances such as antibacterial agents and increase the loading capacity.

[0015] (2) The instant-absorbing and quick-drying cotton-like seaweed carbon fiber material and its preparation method, the antibacterial liquid with hydantoin structure is fixed on the fiber surface through the dual effects of chemical bonding (CN bond) and physical adsorption, the antibacterial rate against Escherichia coli and Staphylococcus aureus is greater than 99%, and the antibacterial rate is still greater than 95% after 50 washings; by forming a hydrophilic polyurethane coating on the fiber surface, which contains a large number of hydroxyl groups (-OH) and ether bonds (-O-), the water diffusion rate is improved.

[0016] In summary, this technical solution, through the collaborative design of "native porosity of seaweed carbon fiber + alkali etching to create microgrooves + parallel spinning into special-shaped cross-sections", enables the fiber to have both high specific surface area loading capacity (microporosity) and multifunctional adaptability (special-shaped structure). It can be used as a carrier for chemical fiber filaments to expand industrial applications, and can also partially replace the hydrophilic carrier scenario of Tencel Lyocell through surface hydrophilic treatment, thereby realizing the cross-border application of "synthetic-regenerated" fiber carriers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Figure a is the SEM image of the seaweed carbon fiber of the present invention; and figure b is the SEM image of the seaweed carbon fiber-modified polyester blended fiber of the present invention. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1 A method for preparing a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material comprises the following steps: Step 1: Pretreatment of seaweed: 15 g of seaweed carbon fiber was placed in deionized water, ultrasonically cleaned at 60°C for 15 min to remove surface impurities, and then dried in an oven at 80°C for 2 h. Step 2: Spinning: Add the modified polyester into a twin-screw extruder at a melt temperature of 260°C and a screw speed of 150 r / min to obtain a modified polyester melt; The modified polyester is prepared by dissolving a mixture of 3 g of sodium dimethyl isophthalate-5-sulfonate and 5 g of polyethylene glycol ether in 8 g of ethylene glycol at 60° C. to obtain a mixed solution; mixing 80 g of terephthalic acid, 35 g of ethylene glycol, and 0.05 g of antimony glycolate, heating the mixture to 220° C., reacting the mixture at normal pressure for 1 hour, adding the mixed solution, and simultaneously adding 5 g of ethylene glycol; heating the mixture to 240° C., 0.3 MPa, and reacting the mixture for 2 hours; further heating the mixture to 270° C., reducing the pressure to below 100 Pa, adding 2 g of triphenyl phosphate, stirring the mixture for 30 minutes, reacting the mixture for 3 hours, and then adding 0.05 g of antimony glycolate and continuing the reaction for 1 hour to obtain the modified polyester. Step 3: Fiber forming: The seaweed carbon fiber and the modified polyester melt are extruded from different spinnerets to form parallel composite fibers. The spinneret temperature is 250°C and the cooling wind speed is 1.5m / s. The fibers are then subjected to hot stretching in a stretching machine with a stretching ratio of 2.5 times and a stretching temperature of 90°C. Step 4: Alkali treatment: immerse the fiber in 5% NaOH solution at 60°C for 20 minutes; Step 5: Impregnation treatment: 20 g of a hydrophilic polyurethane emulsion with a solid content of 5% was used for padding finishing, and the fiber was baked at 150° C. for 5 min. The fiber was then immersed in 45 g of an antibacterial solution at 60° C. for 1 h, and then dried at 100° C. to obtain a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material. Among them, the preparation method of antibacterial liquid: (1) Under N2, 3.4 g of potassium hydroxide and 2.85 g of 5,5-dimethylhydantoin were completely dissolved in 25 g of ultrapure water, and then 6.12 g of allyl bromide was added. The mixture was reacted at 60 °C for 3 h and then cooled naturally. The reaction product was first extracted with 40 mL of dichloromethane, then rotary evaporated, and then purified with petroleum ether. It was then placed at 45 °C and vacuum dried for 12 h to obtain 3-allyl-5,5-dimethylhydantoin. (2) Under N2 atmosphere, dissolve 10 g of 3-allyl-5,5-dimethylhydantoin and 14.8 g of potassium persulfate in 300 mL of deionized water. After complete dissolution, heat to 75 °C and slowly add 16.4 g of methyl methacrylate. After reacting for 12 h, centrifuge and wash the reaction product three times, then dry it under vacuum at 45 °C for 24 h to obtain the antibacterial solution.

[0020] Example 2 A method for preparing a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material comprises the following steps: Step 1: Pretreatment of seaweed: 20 g of seaweed carbon fiber was placed in deionized water, ultrasonically cleaned at 60°C for 15 min to remove surface impurities, and then dried in an oven at 80°C for 2 h. Step 2: Spinning: Add the modified polyester into a twin-screw extruder at a melt temperature of 270°C and a screw speed of 180 r / min to obtain a modified polyester melt; The modified polyester is prepared as follows: at 60°C, a mixture of 4g of sodium dimethyl isophthalate-5-sulfonate and 6g of polyethylene glycol ether is dissolved in 12g of ethylene glycol to obtain a mixed solution; 82g of terephthalic acid, 37g of ethylene glycol, and 0.05g of antimony glycol are mixed, heated to 230°C, reacted at normal pressure for 1.5h, the mixed solution is added, and 7g of ethylene glycol is added simultaneously. The temperature is raised to 250°C, the pressure is 0.4MPa, the reaction is carried out for 2.5h, the temperature is further raised to 275°C, the pressure is reduced to below 100Pa, 3g of triphenyl phosphate is added, the mixture is stirred for 30min, the reaction is carried out for 4h, and 0.05g of antimony glycol is added and the reaction is continued for 1h to obtain the modified polyester; Step 3: Fiber forming: The seaweed carbon fiber and the modified polyester melt are extruded from different spinnerets to form parallel composite fibers. The spinneret temperature is 255°C and the cooling wind speed is 1.8m / s. The fibers are then subjected to hot stretching in a stretching machine with a stretching ratio of 2.5 times and a stretching temperature of 95°C. Step 4: Alkali treatment: immerse the fiber in 6% NaOH solution at 65°C for 25 minutes; Step 5: Impregnation treatment: 25 g of a hydrophilic polyurethane emulsion with a solid content of 7% was used for padding finishing, and the fibers were baked at 150° C. for 5 min. The fibers were then immersed in 55 g of an antibacterial solution at 60° C. for 1 h, and then dried at 100° C. to obtain a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material. Among them, the preparation method of antibacterial liquid: (1) Under N2, 3.5 g of potassium hydroxide and 2.95 g of 5,5-dimethylhydantoin were completely dissolved in 25 g of ultrapure water, and then 6.2 g of allyl bromide was added. The mixture was reacted at 65 °C for 3 h and then cooled naturally. The reaction product was first extracted with 40 mL of dichloromethane, then rotary evaporated, and then purified with petroleum ether. It was then placed at 50 °C and vacuum dried for 12 h to obtain 3-allyl-5,5-dimethylhydantoin. (2) Under N2 atmosphere, dissolve 10 g of 3-allyl-5,5-dimethylhydantoin and 15.1 g of potassium persulfate in 300 mL of deionized water. After complete dissolution, heat to 78 °C and slowly add 16.8 g of methyl methacrylate. After reacting for 12 h, centrifuge and wash the reaction product 4 times, then dry it under vacuum at 48 °C for 24 h to obtain the antibacterial solution.

[0021] Example 3 A method for preparing a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material comprises the following steps: Step 1: Pretreatment of seaweed: 25 g of seaweed carbon fiber was placed in deionized water, ultrasonically cleaned at 60°C for 15 min to remove surface impurities, and then dried in an oven at 80°C for 2 h; Step 2: Spinning: Add the modified polyester into a twin-screw extruder at a melt temperature of 280°C and a screw speed of 200 r / min to obtain a modified polyester melt; The modified polyester is prepared as follows: at 60°C, a mixture of 5g of sodium dimethyl isophthalate-5-sulfonate and 8g of polyethylene glycol ether is dissolved in 15g of ethylene glycol to obtain a mixed solution; 85g of terephthalic acid, 40g of ethylene glycol, and 0.05g of antimony glycol are mixed, heated to 240°C, reacted at normal pressure for 2h, the mixed solution is added, and 8g of ethylene glycol is added simultaneously. The temperature is raised to 260°C, the pressure is 0.5MPa, the reaction is carried out for 3h, the temperature is further raised to 280°C, the pressure is reduced to below 100Pa, 4g of triphenyl phosphate is added, the mixture is stirred for 30min, the reaction is carried out for 5h, and 0.05g of antimony glycol is added and the reaction is continued for 1h to obtain the modified polyester. Step 3, fiber forming: the seaweed carbon fiber and the modified polyester melt are extruded from different spinnerets to form parallel composite fibers. The spinneret temperature is 260°C and the cooling wind speed is 2.0 m / s. The fibers are then subjected to hot stretching in a stretching machine with a stretching ratio of 3.0 times and a stretching temperature of 100°C. Step 4: Alkali treatment: immerse the fiber in 8% NaOH solution at 70°C for 30 minutes; Step 5: Impregnation treatment: 30 g of a hydrophilic polyurethane emulsion with a solid content of 8% was used for padding finishing, and the fibers were baked at 150° C. for 5 min. The fibers were then immersed in 65 g of an antibacterial solution at 60° C. for 1 h, and then dried at 100° C. to obtain a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material. Among them, the preparation method of antibacterial liquid: (1) Under N2, 3.7 g of potassium hydroxide and 3.25 g of 5,5-dimethylhydantoin were completely dissolved in 25 g of ultrapure water, and then 6.35 g of allyl bromide was added. The mixture was reacted at 70 °C for 3 h and then cooled naturally. The reaction product was first extracted with 40 mL of dichloromethane, then rotary evaporated, and then purified with petroleum ether. It was then placed at 50 °C and vacuum dried for 12 h to obtain 3-allyl-5,5-dimethylhydantoin. (2) Under N2 atmosphere, dissolve 10 g of 3-allyl-5,5-dimethylhydantoin and 15.7 g of potassium persulfate in 300 mL of deionized water. After complete dissolution, heat to 80 °C and slowly add 17.2 g of methyl methacrylate. After reacting for 12 h, centrifuge and wash the reaction product 5 times, and then dry it under vacuum at 50 °C for 24 h to obtain the antibacterial solution.

[0022] Comparative Example 1 Compared with Example 1, the difference is that the polyester is not modified; the rest remains unchanged.

[0023] Comparative Example 2 Compared with Example 1, the difference is that the fiber is not immersed in the antibacterial liquid; the rest remains unchanged.

[0024] Moisture absorption and quick-drying test: The test was conducted in accordance with GB / T 21655.1-2008, and the water absorption rate within 1 minute and the evaporation rate within 30 minutes were calculated. The results are shown in Table 1.

[0025] Breaking strength test: The test was conducted in accordance with GB / T 14337-2008; the results are shown in Table 1.

[0026] Table 1 Water absorption rate (%) Evaporation rate (g / h) Breaking strength / MPa Example 1 304 1.94 486 Example 2 298 1.86 481 Example 3 293 1.83 472 Comparative Example 1 261 1.62 463 Comparative Example 2 282 1.76 468 Antibacterial performance: 50 washing cycles were performed according to GB / T8629, and the antibacterial rate was tested according to GB / T20944.3-2008. The inhibition rates before and after washing were compared, and the antibacterial durability retention rate was calculated. The results are shown in Table 2.

[0027] Table 2

[0028] Depend on Figure 1 It can be seen that compared with seaweed carbon fiber, the seaweed carbon fiber-modified polyester blend fiber has more grooves on the fiber surface and the roughness of the fiber surface is increased, which is conducive to the adsorption of antibacterial components.

[0029] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fast-absorbing and quick-drying cotton-like seaweed carbon fiber material, characterized in that: The invention is prepared from the following raw materials in parts by weight: 15-25 parts by weight of seaweed carbon fiber, 40-60 parts by weight of modified polyester, 45-65 parts by weight of antibacterial liquid, and 20-30 parts of hydrophilic polyurethane emulsion; The preparation method of the antibacterial liquid is as follows: 3-allyl-5,5-dimethylhydantoin and potassium persulfate are dissolved in deionized water under N2 atmosphere. After complete dissolution, the temperature is raised to 75-80°C, methyl methacrylate is slowly added dropwise, and after the reaction is carried out for 12 hours, the reaction product is centrifuged, washed, and dried in sequence to obtain the antibacterial liquid.

2. The quick-absorbing and quick-drying cotton-like seaweed carbon fiber material according to claim 1, characterized in that: The mass of the potassium persulfate and the mass of the methyl methacrylate are 148%-157% and 164%-172% of the mass of 3-allyl-5,5-dimethylhydantoin, respectively.

3. The quick-absorbing and quick-drying cotton-like seaweed carbon fiber material according to claim 1, characterized in that: The reaction product was washed by centrifugation 3-5 times and dried under vacuum conditions at 45-50°C for 24 hours.

4. The quick-absorbing and quick-drying cotton-like seaweed carbon fiber material according to claim 1, characterized in that: The specific preparation method of the 3-allyl-5,5-dimethylhydantoin is as follows: potassium hydroxide and 5,5-dimethylhydantoin are completely dissolved in ultrapure water under nitrogen, allyl bromide is added, the mixture is reacted at 60-70° C. for 3 hours, and then naturally cooled. The reaction product is extracted, rotary evaporated, purified, and dried in sequence to obtain 3-allyl-5,5-dimethylhydantoin.

5. The quick-absorbing and quick-drying cotton-like seaweed carbon fiber material according to claim 4, characterized in that: The weight of the ingredients is 2.8-3.25 parts by weight of 5,5-dimethylhexandolin, 3.4-3.7 parts by weight of potassium hydroxide, 25 parts by weight of ultrapure water, and 6.12-6.35 parts by weight of allyl bromide.

6. The quick-absorbing and quick-drying cotton-like seaweed carbon fiber material according to claim 4, characterized in that: in, The product was extracted with 40 mL of dichloromethane, purified with petroleum ether, and dried under vacuum at 45-50° C. for 12 h.

7. The quick-absorbing and quick-drying cotton-like seaweed carbon fiber material according to claim 1, characterized in that: The preparation method of the modified polyester is: (1) Dissolve 3-5 g of a mixture of dimethyl isophthalate-5-sodium sulfonate and 5-8 g of polyethylene glycol ether in 8-15 g of ethylene glycol at 60°C to obtain a mixed solution; (2) Mix 80-85g of terephthalic acid, 35-40g of ethylene glycol, and 0.05g of ethylene glycol antimony, heat to 220-240℃, react at normal pressure for 1-2h, add the mixed solution, and add 5-8g of ethylene glycol at the same time, heat to 240-260℃, pressure 0.3-0.5MPa, and react for 2-3h to obtain modified polyester.

8. The quick-absorbing and quick-drying cotton-like seaweed carbon fiber material according to claim 7, characterized in that: The preparation of the modified polyester further comprises: continuing to heat to 270-280° C., reducing the pressure to below 100 Pa, adding 2-4 g of triphenyl phosphate, stirring for 30 minutes, reacting for 3-5 hours, then adding 0.05 g of ethylene glycol antimony, and continuing the reaction for 1 hour to obtain the modified polyester.

9. A method for preparing the fast-absorbing and fast-drying cotton-like seaweed carbon fiber material according to claim 1, characterized in that: The method comprises the following preparation steps: Step 1: Pretreatment of seaweed: Place the seaweed carbon fiber in deionized water, ultrasonically clean it at 60°C for 15 minutes to remove surface impurities, and then dry it in an oven at 80°C for 2 hours; Step 2: Spinning: Add the modified polyester into a twin-screw extruder at a melt temperature of 260-280°C and a screw speed of 150-200 r / min to obtain a modified polyester melt; Step 3: Fiber forming: The seaweed carbon fiber and the modified polyester melt are extruded from different spinnerets to form parallel composite fibers. The spinneret temperature is 250-260°C, the cooling wind speed is 1.5-2.0 m / s, and then the fibers are hot-stretched in a drawing machine with a drawing ratio of 2.5-3.0 times and a drawing temperature of 90-100°C. Step 4: Alkali treatment: immerse the fiber in 5%-8% NaOH solution at 60-70℃ for 20-30min; Step 5: Impregnation treatment: Use hydrophilic polyurethane emulsion with a solid content of 5%-8% for padding finishing, bake at 150°C for 5 minutes, then immerse the fiber in an antibacterial solution at 60°C for 1 hour, and then dry at 100°C to obtain a fast-absorbing and fast-drying cotton-like seaweed carbon fiber material.

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