Polyester fiber with super moisture absorption and moisture removal performance and preparation method thereof

Abstract

The invention relates to a polyester fiber with super moisture absorption and moisture removal performance and a preparation method thereof.The polyester fiber comprises a modified polyester component, a polyester component, a pore-forming agent and a surface swelling agent, the modified polyester component comprises terephthalic acid, ethylene glycol, sodium 1, 2-dihydroxy-3-propanesulfonate, sodium ethylenediamine ethanesulfonate and a modified composite component, the mass ratio of the terephthalic acid to the ethylene glycol to the 1, 2-dihydroxy-3-sodium sulfonate is 1: (1-2): (0.2-0.3), and the mass ratio of the modified polyester component to the polyester component is (5-20): (80-95). The polyester fiber has the effect of improving moisture absorption and moisture removal of the polyester fiber.

Description

Technical Field

[0001] The present application relates to the field of polyester fibers, and particularly to a polyester fiber with super moisture absorption and moisture wicking performance and a preparation method thereof. Background Art

[0002] As one of the fibers with the largest production volume, increasing the amount of polyester fiber is an inevitable trend. Polyester fiber fabrics have poor water absorption and poor comfort when worn close to the body, and this situation is most obvious when the human body sweats a lot.

[0003] When the human body sweats, it is difficult for the sweat to be discharged from the body surface through the fabric, and the wearer will feel stuffy and uncomfortable. In addition, due to the very poor moisture absorption of polyester fiber, there will also be a series of problems in the spinning and weaving processes, so improvement is needed. Summary of the Invention

[0004] In order to further improve the moisture absorption and moisture wicking performance of polyester fibers, the present application provides a polyester fiber with super moisture absorption and moisture wicking performance and a preparation method thereof.

[0005] In a first aspect, a polyester fiber with super moisture absorption and moisture wicking performance provided by the present application adopts the following technical solution: A polyester fiber with super moisture absorption and moisture wicking performance includes a modified polyester component, a polyester component, a pore-forming agent, and a surface swelling agent. The raw materials of the modified polyester component include terephthalic acid, ethylene glycol, 1,2-dihydroxy-3-propanesulfonic acid sodium, ethylenediaminoethanesulfonic acid sodium, and a modified composite component. The mass ratio between terephthalic acid, ethylene glycol, and 1,2-dihydroxy-3-propanesulfonic acid sodium is 1:(1 - 2):(0.2 - 0.3), and the mass ratio between the modified polyester component and the polyester component is (5 - 20):(80 - 95).

[0006] By adopting the above technical solution, terephthalic acid, ethylene glycol, 1,2-dihydroxy-3-propanesulfonic acid sodium, ethylenediaminoethanesulfonic acid sodium, and the modified composite component are compounded to obtain a modified polyester fiber, and then the modified polyester component and the polyester component are compounded and spun. Small holes are formed by the pore-forming agent, and the surface is treated by the surface swelling agent to further increase the specific surface area of the prepared fiber and further improve the moisture absorption performance of the fiber. At the same time, by limiting the mass ratio in the raw material components of the modified polyester component and the mass ratio between the modified polyester component and the polyester component, the overall stability of the prepared system can be further improved.

[0007] Preferably, the modified polyester component is prepared by the following method: Mix terephthalic acid, ethylene glycol, 1,2-dihydroxy-3-propanesulfonic acid sodium, and ethylenediaminoethanesulfonic acid sodium, raise the temperature for reaction, then add the modified composite component and polyacrylamide, discharge and pelletize after obtaining the polymer, and dry to obtain the modified polyester component; The addition amount of the polyacrylamide is 2-7% of the mass of the modified polyurethane component.

[0008] By adopting the above technical solution, after terephthalic acid, ethylene glycol, 1,2-dihydroxy-3-propanesulfonic acid sodium salt, ethylenediaminoethanesulfonic acid sodium salt are compounded with the modified composite component, and through esterification reaction and polycondensation reaction, a cottony soft feeling similar to cotton is created, so that the specific surface area of the prepared fiber is increased. On the one hand, the overall comfort of the system can be improved, and the moisture and sweat on the skin surface can be quickly absorbed, and through diffusion, transfer and further evaporation, the prepared fiber obtains good moisture absorption and moisture discharge performance.

[0009] Preferably, the modified composite component includes boron nitride, sodium hydroxide and nano-zinc oxide composite microspheres.

[0010] By adopting the above technical solution, as one of the ceramic powders, boron nitride has a good strengthening effect in the composite preparation of the modified polyester component, and at the same time has a good wear resistance effect. After boron nitride is compounded with sodium hydroxide, the dispersion performance of boron nitride in the system can be further improved, thereby improving the stability of the prepared modified polyurethane component. And, boron nitride has a lamellar structure, and its nanosheets can form a nano-barrier on the surface of bacteria, playing an antibacterial effect. Nano-zinc oxide can release Zn 2+ , after combining with the nano-zinc oxide composite microspheres, the two play a synergistic antibacterial performance.

[0011] Preferably, the nano-zinc oxide composite microspheres are prepared by the following method: Potassium persulfate, polyvinylpyrrolidone and water are mixed, and after stirring, styrene and acrylic acid are added, and stirring is continued to obtain a dispersion system. The dispersion system is heated and reacted, and after the reaction, it is dried to obtain quaternized microspheres; the quaternized microspheres, ethanol and zinc acetate dihydrate are mixed to obtain a mixed solution; the mixed solution is heated and stirred, and then sodium hydroxide is added, and stirring reaction is continued to obtain prefabricated microspheres. The prefabricated microspheres, water, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysuccinimide are mixed, and after stirring, they are dried to obtain nano-zinc oxide composite microspheres.

[0012] By adopting the above technical solution, polyvinylpyrrolidone-coated nano-zinc oxide composite microspheres are prepared by dispersion polymerization. Under the coordination interaction between the pyrrolidone ring of polyvinylpyrrolidone on its surface and zinc ions, more nano-zinc oxide is uniformly dispersed and fixed on the surface of the prepared quaternized microspheres. The surface of the nano-zinc oxide composite microspheres is positively charged, attracting bacteria and the like and killing the bacteria, further improving the overall antibacterial performance of the prepared fiber.

[0013] Preferably, the mass ratio between the potassium persulfate and the polyvinylpyrrolidone is 40:(1-1.4).

[0014] By adopting the above technical solution, preferably, the mass ratio of potassium persulfate to polyvinylpyrrolidone is within the above range, which can further improve the overall antibacterial performance of the prepared nano-zinc oxide composite microspheres.

[0015] Preferably, the mass of zinc acetate dihydrate in the mixed solution is 22 - 26 mM.

[0016] By adopting the above technical solution, preferably, the mass ratio of zinc acetate dihydrate is within the above range, which can further improve the stability and antibacterial property of the prepared nano-zinc oxide composite microspheres.

[0017] Preferably, the modified composite component is prepared by the following method: Add hexagonal boron nitride to sodium hydroxide solution, stir and react, centrifuge, wash and dry to obtain sodium hydroxide modified boron nitride; mix nano-zinc oxide composite microspheres, sodium hydroxide modified boron nitride and sodium hydroxide solution, heat up and react, cool to obtain a preform, mix zinc nitrate hexahydrate, hexamethylenetetramine and water, add the preform, stir and react, after cooling, ultrasonically centrifuge, wash and dry to obtain the modified composite component.

[0018] By adopting the above technical solution, through the combination of hydrothermal treatment and ultrasonic treatment, the bulk hexagonal boron nitride is first exfoliated in sodium hydroxide solution, and then the modified composite component is prepared by in-situ synthesis. The dispersion performance of hexagonal boron nitride treated by sodium hydroxide in the system is significantly improved, and it can combine more stably with nano-zinc oxide composite microspheres, thus further improving the antibacterial performance of the prepared modified polyester component.

[0019] Preferably, the mass ratio between the nano-zinc oxide composite microspheres and the sodium hydroxide modified boron nitride is (1.67 - 1.77):1.

[0020] By adopting the above technical solution, preferably, the mass ratio between the nano-zinc oxide composite microspheres and the sodium hydroxide modified boron nitride is within the above range, which can further improve the overall stability of the prepared modified composite component.

[0021] Preferably, the pore former includes any one or more of pulverized coal, bentonite and polyimide-based resin.

[0022] In the second aspect, the present application provides a preparation method of a polyester fiber with super moisture absorption and sweat discharge performance, adopting the following technical solution: A preparation method of a polyester fiber with super moisture absorption and sweat discharge performance, comprising the following steps: Slice and blend the modified polyester component and the polyester component and then spin them to obtain modified fibers. Place the modified fibers, the pore-forming agent, and the surface swelling agent in a sodium hydroxide solution, let it stand, wash the fibers, and dry them to obtain polyester fibers with super moisture absorption and sweat discharge performance.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. First, prepare the modified polyester component from terephthalic acid, ethylene glycol, 1,2-dihydroxy-3-propanesulfonate, ethylenediaminoethanesulfonate, and the modified composite component. The fiber obtained by compounding the prepared modified polyester component and the polyester component forms small holes through the pore-forming agent, and then the surface is treated with the surface swelling agent. The obtained polyester fiber has a soft feeling similar to cotton, which not only improves the comfort of the polyester fiber, but also has a large specific surface area, can quickly absorb the moisture and sweat on the skin surface, and further improves the overall moisture absorption performance of the fiber; 2. The modified composite component is prepared from boron nitride, sodium hydroxide, and nano-zinc oxide composite microspheres. Boron nitride plays a good strengthening role in the modified polyester component. After boron nitride is combined with sodium hydroxide, the dispersion performance of boron nitride in the system can be improved, and the overall stability of the system is improved. At the same time, both boron nitride and nano-zinc oxide have good antibacterial properties, thus playing a synergistic antibacterial role; 3. The nano-zinc oxide composite microspheres prepared by dispersion polymerization have good dispersion performance, and under the coordination of the pyrrolidone ring and zinc ions, the overall synergistic antibacterial performance of the system is further improved. Specific Embodiments

[0024] The following further elaborates on the present application with reference to examples: Description of raw materials: All raw materials in the examples can be obtained commercially; the surface swelling agent is a mixture of 5% by mass of silane coupling agent TD-101, 4% of water-based epoxy resin, 4% of non-ionic surfactant, 2% of carboxymethyl cellulose, and the balance is deionized water.

[0025] Example 1 Prepare nano-zinc oxide composite microspheres: 40 g of potassium persulfate and 1 g of polyvinylpyrrolidone (CAS No.: 9003-39-8) were added to 500 g of deionized water. Nitrogen was introduced to remove oxygen, and the mixture was stirred at 500 rpm for 30 min at 25 °C. Then, 20 g of styrene (CAS No.: 100-42-5) and 5 g of acrylic acid (CAS No.: 79-10-7) were added to the system, and stirring was continued for 20 min to obtain a dispersion system. The dispersion system was heated to 80 °C and reacted for 12 h under a nitrogen atmosphere. Then, the temperature was raised to 85 °C and reacted for 30 min. After the reaction, the product was dried at 65 °C to obtain quaternized microspheres. The quaternized microspheres, 800 ml of ethanol and zinc acetate dihydrate (CAS No.: 5970-45-6) were mixed to obtain a mixed solution. The mass of zinc acetate dihydrate in the mixed solution was 22 mM. After heating to 60 °C, stirring was maintained for 1 h, and then 500 ml of 0.5 mol / L sodium hydroxide was added, and stirring and reaction were continued for 2 h to obtain prefabricated microspheres. The prefabricated microspheres were added to deionized water, and then 10 mmol of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (CAS No.: 1892-57-5) and 10 mmol of N-hydroxysuccinimide (CAS No.: 6066-82-6) were added, and stirring was carried out for 1 h. Then, the product was dried at 65 °C to obtain nano-zinc oxide composite microspheres.

[0026] Preparation of modified composite component: Hexagonal boron nitride was added to a 5 mol / L sodium hydroxide solution, and the mixture was stirred and reacted at 500 rpm for 5 h at 60 °C. The pH of the system was adjusted to 7 with deionized water, and then centrifuged, washed 3 times with deionized water, and dried at 60 °C for 18 h to obtain sodium hydroxide modified boron nitride. 18.76 g of nano-zinc oxide composite microspheres, 11.24 g of sodium hydroxide modified boron nitride and 800 mL of 5 mol / L sodium hydroxide solution were mixed, transferred to a reaction kettle, and reacted at 150 °C for 30 min. Then, it was cooled to 25 °C, reheated and cooled again, and this process was repeated three times to obtain a prefabricated product. 13 g of zinc nitrate hexahydrate, 7.5 g of hexamethylenetetramine (CAS No.: 100-97-0) and 500 g of deionized water were mixed, and the above-obtained prefabricated product was added. Under the condition of an oil bath at 100 °C, the mixture was stirred and reacted at 500 rpm for 12 h, cooled to 25 °C, centrifuged after ultrasonic treatment, washed 3 times with deionized water, and dried at 60 °C for 18 h to obtain the modified composite component.

[0027] Preparation of modified polyester component: Terephthalic acid (CAS No.: 100-21-0), ethylene glycol, 3-sulfo-1,2-propanediol sodium salt, and N-(2-hydroxyethyl)ethylenediamine-N,N'-disulfonic acid disodium salt (CAS No.: 34730-59-1) were added to a reaction kettle in a mass ratio of 1:1:0.2:1, and the temperature was raised to 255 °C. Esterification reaction was carried out under a pressure of 0.22 MPa. Then, a modified composite component and polyacrylamide (CAS No.: 9003-05-8) were added to obtain an esterified product. The mass ratio of the modified composite component in the esterified product was 1%, and the mass ratio of polyacrylamide was 2%. The esterified product was heated to 270 °C for polycondensation reaction. After the reaction was completed, the product was discharged, pelletized, and dried to obtain a modified polyester component.

[0028] Preparation of polyester fibers with excellent moisture absorption and sweat release properties: The modified polyester component and the polyester component were sliced and then melt-blended and spun. The mass ratio between the modified polyester component and the polyester component was 5:80 to obtain modified fibers. The modified fibers, a pore-forming agent, and a surface swelling agent were placed in a sodium hydroxide solution and allowed to stand for 5 min. Then, the fibers were washed with deionized water and transferred to an oven at 65 °C for drying for 12 h to obtain polyester fibers with excellent moisture absorption and sweat release properties; among them, the pore-forming agent was a mixture of pulverized coal and bentonite in a mass ratio of 1:1.

[0029] Example 2 Preparation of nano-zinc oxide composite microspheres: 40 g of potassium persulfate and 1.4 g of polyvinylpyrrolidone were added to 500 g of deionized water. Nitrogen was introduced to remove oxygen, and the mixture was stirred at 500 rpm for 30 min at 25 °C. Then, 20 g of styrene and 5 g of acrylic acid were added to the system, and stirring was continued for 20 min to obtain a dispersion system. The dispersion system was heated to 80 °C and reacted for 12 h under a nitrogen atmosphere. Then, the temperature was raised to 85 °C and reacted for 30 min. After the reaction was completed, the product was dried at 65 °C to obtain quaternized microspheres. The quaternized microspheres, 800 ml of ethanol, and zinc acetate dihydrate were mixed to obtain a mixed solution. The mass of zinc acetate dihydrate in the mixed solution was 26 mM. After heating to 60 °C, stirring was maintained for 1 h, and then 500 ml of 0.5 mol / L sodium hydroxide was added, and stirring and reaction were continued for 2 h to obtain prefabricated microspheres. The prefabricated microspheres were added to deionized water, and then 10 mmol of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and 10 mmol of N-hydroxysuccinimide were added, and stirring was carried out for 1 h. Then, the product was dried at 65 °C to obtain nano-zinc oxide composite microspheres.

[0030] Preparation of modified composite component: Hexagonal boron nitride was added to a 5 mol / L sodium hydroxide solution, and the mixture was stirred at a speed of 500 rpm for 5 h at 60 °C. The pH of the system was adjusted to 7 with deionized water, and then centrifuged. It was washed 3 times with deionized water and dried at 60 °C for 18 h to obtain sodium hydroxide-modified boron nitride; 19.17 g of nano-zinc oxide composite microspheres, 10.83 g of sodium hydroxide-modified boron nitride and 800 mL of 5 mol / L sodium hydroxide solution were mixed and transferred to a reaction kettle. The reaction was carried out at 150 °C for 30 min, then cooled to 25 °C, reheated and cooled again, and this was repeated three times to obtain a prefabricated product. 13 g of zinc nitrate hexahydrate, 7.5 g of hexamethylenetetramine and 500 g of deionized water were mixed, and the above-obtained prefabricated product was added. The reaction was stirred at a speed of 500 rpm for 12 h under an oil bath condition of 100 °C, cooled to 25 °C, centrifuged after ultrasonic treatment, washed 3 times with deionized water, and then dried at 60 °C for 18 h to obtain a modified composite component.

[0031] Preparation of modified polyester component: Terephthalic acid, ethylene glycol, 1,2-dihydroxy-3-propanesulfonic acid sodium salt, and ethylenediaminoethanesulfonic acid sodium salt were added to a reaction kettle in a mass ratio of 1:2:0.3:1, heated to 255 °C, and an esterification reaction was carried out under a pressure of 0.22 MPa. Then, a modified composite component and polyacrylamide were added to obtain an esterified product. The mass ratio of the modified composite component in the esterified product was 5%, and the mass ratio of polyacrylamide was 7%; the esterified product was heated to 270 °C for a polycondensation reaction. After the reaction ended, it was discharged, pelletized, and dried to obtain a modified polyester component.

[0032] Preparation of polyester fiber with super moisture absorption and sweat discharge performance: The modified polyester component and the polyester component were sliced and then melt-blended and spun. The mass ratio between the modified polyester component and the polyester component was 20:95 to obtain a modified fiber. The modified fiber, pore-forming agent, and surface swelling agent were placed in a sodium hydroxide solution and allowed to stand for 5 min. Then, the fiber was washed with deionized water and transferred to an oven at 65 °C for drying for 12 h to obtain a polyester fiber with super moisture absorption and sweat discharge performance.

[0033] Example 3 Preparation of nano-zinc oxide composite microspheres: Add 40 g of potassium persulfate and 1.2 g of polyvinylpyrrolidone to 500 g of deionized water, pass nitrogen to remove oxygen, stir at a speed of 500 rpm for 30 min at 25 °C, then add 20 g of styrene and 5 g of acrylic acid to the system, and continue stirring for 20 min to obtain a dispersion system. Heat the dispersion system to 80 °C and react for 12 h under a nitrogen atmosphere, then heat to 85 °C and react for 30 min. After the reaction, dry at 65 °C to obtain quaternized microspheres. Mix the quaternized microspheres, 800 ml of ethanol and zinc acetate dihydrate to obtain a mixed solution. The mass of zinc acetate dihydrate in the mixed solution is 24 mM; heat to 60 °C and keep stirring for 1 h, then add 500 ml of 0.5 mol / L sodium hydroxide and continue stirring and reacting for 2 h to obtain prefabricated microspheres. Add the prefabricated microspheres to deionized water, then add 10 mmol of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and 10 mmol of N-hydroxysuccinimide, stir for 1 h, and then dry at 65 °C to obtain nano-zinc oxide composite microspheres.

[0034] Prepare the modified composite component: Add hexagonal boron nitride to a 5 mol / L sodium hydroxide solution, stir and react at a speed of 500 rpm for 5 h at 60 °C, adjust the pH of the system to 7 with deionized water, then centrifuge, wash 3 times with deionized water, and dry at 60 °C for 18 h to obtain sodium hydroxide-modified boron nitride; mix 18.97 g of nano-zinc oxide composite microspheres, 11.03 g of sodium hydroxide-modified boron nitride and 800 mL of 5 mol / L sodium hydroxide solution, transfer to a reaction kettle, react at 150 °C for 30 min, then cool to 25 °C, heat up and react again and then cool, repeat three times to obtain a prefabricated product. Mix 13 g of zinc nitrate hexahydrate, 7.5 g of hexamethylenetetramine and 500 g of deionized water, add the above-obtained prefabricated product, stir and react at a speed of 500 rpm for 12 h under an oil bath condition of 100 °C, cool to 25 °C, centrifuge after ultrasonic treatment, wash 3 times with deionized water, and then dry at 60 °C for 18 h to obtain the modified composite component.

[0035] Prepare the modified polyester component: Add terephthalic acid, ethylene glycol, sodium 3-sulpho-1,2-dihydroxypropane, and sodium N-(2-aminoethyl)-2-aminoethanesulfonate to the reaction kettle in a mass ratio of 1:1.5:0.25:1, heat up to 255 °C, and carry out an esterification reaction under a pressure of 0.22 MPa. Then add the modified composite component and polyacrylamide to obtain an esterified product. The mass ratio of the modified composite component in the esterified product is 3%, and the mass ratio of polyacrylamide is 4.5%. Heat up the esterified product to 270 °C and carry out a polycondensation reaction. After the reaction is completed, discharge, pelletize, and dry to obtain the modified polyester component.

[0036] Prepare polyester fibers with super moisture absorption and sweat discharge properties: Slice and blend the modified polyester component and the polyester component for spinning. The mass ratio between the modified polyester component and the polyester component is 12.5:87.5 to obtain modified fibers. Place the modified fibers, pore-forming agent, and surface swelling agent in sodium hydroxide solution, let it stand for 5 min, then wash the fibers with deionized water, and transfer them to an oven at 65 °C for drying for 12 h to obtain polyester fibers with super moisture absorption and sweat discharge properties.

[0037] Example 4 Example 4 is based on Example 3. The difference between Example 4 and Example 3 is that in the preparation of the nano-zinc oxide composite in Example 4, the usage amount of polyvinylpyrrolidone is 0.8 g.

[0038] Example 5 Example 5 is based on Example 3. The difference between Example 5 and Example 3 is that in the preparation of the nano-zinc oxide composite in Example 5, the usage amount of polyvinylpyrrolidone is 1.8 g.

[0039] Example 6 Example 6 is based on Example 3. The difference between Example 6 and Example 3 is that in the preparation of the nano-zinc oxide composite in Example 6, the mass of zinc acetate dihydrate in the mixed solution is 18 mM.

[0040] Example 7 Example 7 is based on Example 3. The difference between Example 7 and Example 3 is that in the preparation of the nano-zinc oxide composite in Example 7, the mass of zinc acetate dihydrate in the mixed solution is 30 mM.

[0041] Example 8 Example 8 is based on Example 3. The difference between Example 8 and Example 3 is that in the preparation of the modified composite component in Example 8, 18 g of nano-zinc oxide composite microspheres and 12 g of sodium hydroxide-modified boron nitride are used.

[0042] Example 9 Example 9 Based on Example 3, the difference between Example 9 and Example 3 is that when preparing the modified composite component in Example 9, 19.66 g of nano-zinc oxide composite microspheres and 10.34 g of sodium hydroxide modified boron nitride are used.

[0043] Example 10 Example 10 Based on Example 3, the difference between Example 10 and Example 3 is that when preparing the modified composite component in Example 10, the nano-zinc oxide composite is replaced with ordinary nano-zinc oxide.

[0044] Example 11 Example 11 Based on Example 3, the difference between Example 11 and Example 3 is that when preparing the modified composite component in Example 11, the sodium hydroxide modified boron nitride is replaced with ordinary hexagonal boron nitride.

[0045] Comparative Example 1 Comparative Example 1 Based on Example 3, when preparing the modified polyurethane component in Comparative Example 1, the following method is adopted: heat the polyethylene terephthalate to the molten state, then add the modified composite component and polyacrylamide. The mass ratio of the modified composite component is 3%, and the mass ratio of polyacrylamide is 4.5%; then discharge, pelletize, and dry to obtain the modified polyester component.

[0046] Comparative Example 2 Comparative Example 2 Based on Example 3, when preparing the modified polyester component in Comparative Example 2, the modified composite component is replaced with ordinary hexagonal boron nitride.

[0047] Performance Detection Test For the specimens of Examples 1 - 11 and Comparative Examples 1 - 2, after finishing, spinning is carried out to form yarns, and then weaving is carried out to obtain the corresponding fabrics. The following performance tests are carried out on the fabrics: (1) Moisture Absorption Performance Taking 《GB / T 21655.1 - 2023》 as the detection standard, the dripping diffusion time detection and water absorption rate performance test are carried out on the specimens before washing. Each specimen is tested 3 times, and the average value is taken, and the detection results are filled in Table 1; Taking 《GB / T 21655.1 - 2008》 as the detection standard, the wicking height test is carried out on the specimens after washing. Each specimen is tested 3 times, and the average value is taken, and the detection results are filled in Table 1; Taking 《GB / T 21655.1 - 2023》 as the detection standard, the evaporation rate test is carried out on the specimens after washing. Each specimen is tested 3 times, and the average value is taken, and the detection results are filled in Table 1; (2) Bacteriostatic Performance Taking 《GB / T 20944.3-2008》as the detection standard, the antibacterial performance of the washed specimens was tested. Each specimen was tested 3 times, and the average value was taken, and the test results were filled in Table 1.

[0048] In the above test procedures, the washing procedures were all based on 《GB / T 8629》 as the standard.

[0049] Table 1 Performance test results of Examples 1-11 and Comparative Examples 1-2 Combined with Table 1, it can be seen that the water drop diffusion time of Examples 1-3 was all within 1 s, the water absorption rate was all 300% and above, after washing, the longitudinal wicking height was all 150 mm and above, the transverse wicking height was all 170 mm and above, and the evaporation rate was 0.35 g / h and above, indicating that the polyester fibers prepared in this application had good moisture absorption and moisture discharge performance; the antibacterial rate of Staphylococcus aureus in Examples 1-3 was all 99% and above, the antibacterial rate of Escherichia coli was all 97% and above, and the antibacterial rate of Candida albicans was all 95% and above, indicating that the polyester fibers prepared in this application had good antibacterial performance.

[0050] In Examples 4 and 5 during the preparation of the nano-zinc oxide composite, the mass ratio between polyvinylpyrrolidone and potassium persulfate was not within the range defined in this application. When the content of polyvinylpyrrolidone was too small, it was difficult to further promote the loading amount of quaternized microspheres on nano-zinc oxide, the content of nano-zinc oxide in the system decreased, and it was difficult to further improve the antibacterial performance; when the content of polyvinylpyrrolidone was too large, it led to an excessive loading amount of nano-zinc oxide, resulting in agglomeration, and the overall stability of the system decreased, affecting the comprehensive performance of the system.

[0051] In Examples 6 and 7 during the preparation of the nano-zinc oxide composite, the addition amount of zinc acetate dihydrate in the mixed solution was not within the range defined in this application. When the content of zinc acetate dihydrate was too small or too large, the diameter of the prepared nano-zinc oxide particles was difficult to be uniform, so it was difficult to stably load on the surface of the quaternized microspheres and agglomeration occurred, affecting the overall stability of the system. Therefore, the performance of Examples 6 and 7 both decreased.

[0052] In Examples 8 and 9 during the preparation of the modified composite component, the mass ratio between the nano-zinc oxide composite microspheres and sodium hydroxide-modified boron nitride was not within the range defined in this application. When the content of the nano-zinc oxide composite microspheres was too small or too large, it was difficult to further stably combine with the modified boron nitride and agglomeration occurred in the system, so it affected the overall stability of the system. Therefore, the performance of Examples 8 and 9 both decreased.

[0053] In Example 10, when preparing the modified composite component, the nano-zinc oxide composite was replaced with ordinary nano-zinc oxide. The dispersion performance of the unmodified nano-zinc oxide was difficult to further improve, the binding performance decreased, and the antibacterial performance was also difficult to further improve. Therefore, the performance of Example 10 all decreased.

[0054] In Example 11, when preparing the composite modified component, the sodium hydroxide-modified boron nitride was replaced with ordinary hexagonal boron nitride. The thickness of the ordinary hexagonal boron nitride without sodium hydroxide exfoliation was too large, the structural stability was difficult to further improve, and the particle size was too large, resulting in agglomeration in the system, which affected the overall stability of the system. Therefore, the performance of Example 11 all decreased.

[0055] In Comparative Example 1, poly(ethylene terephthalate) was mixed with polyacrylamide and a modified component to obtain a modified polyurethane. It was difficult to obtain a structure with a cottony feel, the bulkiness decreased, and the dispersion performance of each component in the system was also difficult to further improve. Therefore, the overall performance of Comparative Example 1 all decreased.

[0056] In Comparative Example 2, the modified component was replaced with ordinary hexagonal boron nitride. The system without adding nano-zinc oxide composite microspheres was difficult to further synergistically inhibit bacteria, and the ordinary hexagonal boron nitride agglomerated in the system, resulting in a decrease in the stability of the system. Therefore, the performance of Comparative Example 2 all decreased.

[0057] This specific embodiment is only an explanation of the present application, and it is not a limitation of the present application. Through the above description, relevant staff can make various changes and modifications completely within the scope of the technical idea of this application. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A polyester fiber with super moisture absorption and moisture wicking properties, characterized in that: It includes a modified polyester component, a polyester component, a pore-forming agent and a surface swelling agent. The raw materials of the modified polyester component include terephthalic acid, ethylene glycol, 1,2-dihydroxy-3-propanesulfonic acid sodium salt, ethylenediaminoethanesulfonic acid sodium salt and a modified composite component. The mass ratio between terephthalic acid, ethylene glycol and 1,2-dihydroxy-3-propanesulfonic acid sodium salt is 1:(1 - 2):(0.2 - 0.3), and the mass ratio between the modified polyester component and the polyester component is (5 - 20):(80 - 95).

2. The polyester fiber with super moisture absorption and moisture wicking performance according to claim 1, characterized in that: The modified polyester component is prepared by the following method: Mix terephthalic acid, ethylene glycol, 1,2-dihydroxy-3-propanesulfonic acid sodium salt and ethylenediaminoethanesulfonic acid sodium salt, raise the temperature for reaction, then add the modified composite component and polyacrylamide, and after obtaining the polymer, discharge and pelletize, and dry to obtain the modified polyester component; The addition amount of the polyacrylamide is 2 - 7% of the mass of the modified polyurethane component.

3. The polyester fiber with excellent moisture absorption and moisture wicking performance according to claim 1, characterized in that: The modified composite component includes boron nitride, sodium hydroxide and nano-zinc oxide composite microspheres.

4. The polyester fiber with super moisture absorption and moisture wicking performance according to claim 3, characterized in that: The nano-zinc oxide composite microspheres are prepared by the following method: Mix potassium persulfate, polyvinylpyrrolidone and water, stir and then add styrene and acrylic acid, continue to stir to obtain a dispersion system, raise the temperature of the dispersion system for reaction, and after reaction, dry to obtain quaternized microspheres; Mix the quaternized microspheres, ethanol and zinc acetate dihydrate to obtain a mixed solution; Raise the temperature and stir the mixed solution, then add sodium hydroxide, continue to stir and react to obtain prefabricated microspheres, mix the prefabricated microspheres, water, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysuccinimide, stir and then dry to obtain nano-zinc oxide composite microspheres.

5. A polyester fiber with super moisture absorption and moisture wicking properties according to claim 4, characterized in that: The mass ratio between potassium persulfate and polyvinylpyrrolidone is 40:(1 - 1.4).

6. The polyester fiber with super moisture absorption and moisture wicking performance according to claim 4, characterized in that: The mass of zinc acetate dihydrate in the mixed solution is 22 - 26 mM.

7. The polyester fiber with super moisture absorption and moisture wicking performance according to claim 3, characterized in that: The modified composite component is prepared by the following method: Add hexagonal boron nitride to a sodium hydroxide solution, stir and react, centrifuge, wash and dry to obtain sodium hydroxide-modified boron nitride; Mix the nano-zinc oxide composite microspheres, sodium hydroxide-modified boron nitride and a sodium hydroxide solution, raise the temperature for reaction, cool to obtain a prefabricated product, mix zinc nitrate hexahydrate, hexamethylenetetramine and water, add the prefabricated product, stir and react, cool, then ultrasonically centrifuge, wash and dry to obtain the modified composite component.

8. A polyester fiber with super moisture absorption and moisture wicking performance according to claim 7, characterized in that: The mass ratio between the nano-zinc oxide composite microspheres and the sodium hydroxide-modified boron nitride is (1.67 - 1.77):

1.

9. The polyester fiber with super moisture absorption and moisture wicking performance according to claim 1, characterized in that: The pore-forming agent includes any one or more of pulverized coal, bentonite and polyimide-based resin.

10. A method for preparing a polyester fiber with super moisture absorption and sweat discharge performance according to any one of claims 1-9, characterized in that: It includes the following steps: Slice and blend the modified polyester component and the polyester component for spinning to obtain modified fibers. Put the modified fibers, the pore-forming agent and the surface swelling agent in a sodium hydroxide solution, let it stand, then wash the fibers and dry to obtain polyester fibers with super moisture absorption and sweat discharge performance.

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