An antibacterial modified polyester fiber, a preparation method and application thereof

Abstract

The application belongs to the technical field of polyester fibers, and particularly relates to an antibacterial modified polyester fiber and a preparation method and application thereof. The preparation method of the antibacterial modified polyester fiber comprises the following steps: S1, uniformly mixing functionalized tourmaline powder and polyester powder, granulating through a double-screw extruder to obtain modified polyester granules; and S2, drying the modified polyester granules and polyester chips, uniformly mixing, and spinning through a melt spinning machine to obtain the antibacterial modified polyester fiber. The functionalized tourmaline powder is used to modify the polyester fiber, the compatibility of the functionalized tourmaline powder and the polyester fiber is good, the functionalized tourmaline powder can be uniformly dispersed in the polyester fiber, the comprehensive performance of the polyester fiber is improved, and the polyester fiber itself has certain waterproof and oil-proof functions. The antibacterial modified polyester fiber prepared by the application has good mechanical properties, flame-retardant properties and antibacterial properties, and particularly has strong antibacterial durability.

Description

Technical Field

[0001] This invention belongs to the field of polyester fiber technology, specifically relating to an antibacterial modified polyester fiber, its preparation method, and its application. Background Technology

[0002] Polyester fiber (polyester) is a high-molecular synthetic fiber made from terephthalic acid and ethylene glycol through esterification or transesterification and polycondensation reactions. Polyester fiber has excellent mechanical properties, wrinkle resistance, shape retention, abrasion resistance, and non-lint-sticking properties, and is widely used in clothing, home textiles, mats, toys, and many other fields. Due to its high crystallinity and tight molecular arrangement, polyester fiber lacks hydrophilic groups, resulting in poor moisture absorption. After sweating, it is difficult for the fiber to absorb and dissipate sweat. Polyester fiber itself does not have antibacterial properties, making it easy for bacteria, mold, and microorganisms to grow, producing odors and affecting the performance and health of users. With the improvement of living standards, people have put forward increasingly higher requirements for the functionality of polyester fiber, especially its antibacterial properties. Modifying polyester fiber to improve its functionality has become a research focus in recent years.

[0003] Chinese patent application number 202411583723.9 discloses a multifunctional polyester fiber based on modified graphene and its preparation method. The preparation method includes the following steps: dissolving dopamine hydrochloride, benzaldehyde compounds, and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in an alcohol solution to obtain a modification solution; under alkaline conditions and the action of a catalyst, graphene undergoes a polymerization reaction in the modification solution to obtain modified graphene; granulating the modified graphene and polyester powder to obtain a multifunctional polyester masterbatch; spinning the multifunctional polyester masterbatch and polyester chips to obtain a multifunctional polyester fiber based on modified graphene. The obtained multifunctional polyester fiber has a limiting oxygen index of 28.5%-29.1% and an antibacterial activity as high as 99.9%. Although it achieves a high antibacterial rate, its antibacterial durability is insufficient.

[0004] Chinese patent application No. 202411962574.7 discloses a multifunctional polyester fiber based on the antibacterial properties of Artemisia argyi and its preparation method. The preparation method specifically involves: synthesizing polyester using terephthalic acid and ethylene glycol as raw materials, adding Artemisia argyi extract during the process to obtain a polyester melt, and then spinning the polyester melt in a screw extruder to obtain nascent fibers; subsequently, stretching, crimping, and shaping the nascent fibers to obtain the multifunctional polyester fiber with antibacterial properties of Artemisia argyi. The Artemisia argyi extract contains natural antibacterial and anti-inflammatory effects, which can effectively inhibit the growth and reproduction of bacteria and microorganisms, but the antibacterial rate it achieves is less than 95%, which cannot meet the requirements for high antibacterial properties.

[0005] Therefore, it is necessary to modify polyester fibers to obtain polyester fibers with excellent and long-lasting antibacterial effects. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an antibacterial modified polyester fiber, its preparation method, and its application. This invention uses functionalized tourmaline powder to modify polyester fibers. The functionalized tourmaline powder has good compatibility with polyester fibers and can be uniformly dispersed within the polyester fibers, improving the overall performance of the polyester fibers while retaining certain waterproof and oil-resistant properties. The antibacterial modified polyester fiber obtained by this invention has excellent mechanical properties, flame retardant properties, and antibacterial properties, especially strong antibacterial durability.

[0007] The technical solution adopted by the present invention to solve the above problems is as follows:

[0008] A method for preparing antibacterial modified polyester fiber includes the following steps:

[0009] S1. Mix functionalized tourmaline powder and polyester powder evenly, and granulate them through a twin-screw extruder to obtain modified polyester masterbatch.

[0010] S2. After drying the modified polyester masterbatch and polyester chips, mix them evenly and spin them through a melt spinning machine to obtain antibacterial modified polyester fibers.

[0011] Furthermore, the mass ratio of the functionalized tourmaline powder and polyester powder in step S1 is 1:3-4.

[0012] Furthermore, the temperature of the twin-screw extruder in step S1 is 260-270°C.

[0013] Furthermore, the mass ratio of the modified polyester masterbatch to polyester chips in step S2 is 1:4-5.

[0014] Furthermore, the spinning speed in step S2 is 2500-2600 m / min, and the spinning temperature is 280-290℃.

[0015] In the technical solution of this invention, the preparation method of the functionalized tourmaline powder in step S1 is as follows:

[0016] (1) Add tourmaline powder to the mixed solvent and stir evenly. At a temperature of 60-70℃, add 3-aminopropyltriethoxysilane dropwise. After the addition is complete, continue stirring for 2-3 hours to obtain aminated tourmaline powder.

[0017] (2) Add the aminated tourmaline powder to anhydrous chloroform and stir until homogeneous. At a temperature of 35-40℃, slowly add epichlorohydrin. After the addition is complete, continue stirring for 4-5 hours. Then, place the mixture in an ice bath and add triethylamine first, followed by diethylphosphite chloride. After the addition is complete, keep the mixture warm for 2-3 hours to obtain modified tourmaline powder.

[0018] (3) Add the modified tourmaline powder to N,N-dimethylformamide, stir evenly, add triphenylphosphine at a temperature of 115-120℃, and continue stirring for 22-24h to obtain functionalized tourmaline powder.

[0019] Further, in step (1), the mass ratio of tourmaline powder and 3-aminopropyltriethoxysilane is 1:0.3-0.4; the mixed solvent is ethanol and water in a mass ratio of 1:2-3.

[0020] Further, in step (2), the mass ratio of aminated tourmaline powder, epichlorohydrin, diethylphosphorous chloride, and triethylamine is 1:0.4-0.5:0.7-0.8:0.5-0.6.

[0021] Furthermore, the mass ratio of the modified tourmaline powder and triphenylphosphine in step (3) is 1:0.8-1.

[0022] The present invention also provides an antibacterial modified polyester fiber, which is prepared by the above-described method for preparing an antibacterial modified polyester fiber.

[0023] The present invention also provides a fabric containing antibacterial modified polyester fiber, including the antibacterial modified polyester fiber obtained by the present invention.

[0024] The present invention has the following beneficial effects:

[0025] This invention uses tourmaline powder as raw material. First, it reacts with 3-aminopropyltriethoxysilane to obtain aminated tourmaline powder. Then, the amino group reacts with epichlorohydrin to introduce hydroxyl and alkyl chloride groups. The hydroxyl groups then react with diethylphosphorous chloride to obtain modified tourmaline powder. Finally, the alkyl chlorides react with triphenylphosphine to obtain functionalized tourmaline powder. The functionalized tourmaline powder obtained in this invention has phosphate groups with flame-retardant properties and quaternary phosphonium salt groups with flame-retardant and antibacterial properties grafted onto its surface. These two groups work synergistically to greatly improve the flame-retardant properties of polyester fibers. The tourmaline powder in the functionalized tourmaline powder can achieve an antibacterial effect by continuously releasing negative ions, which, combined with the quaternary phosphonium salt groups, further enhances the antibacterial properties of polyester fibers, allowing the polyester fibers to maintain a high antibacterial rate even after multiple washes. Furthermore, after a series of organic modifications, the functionalized tourmaline powder obtained in this invention has better compatibility with polyester fibers, which also helps improve the mechanical properties of polyester fibers.

[0026] This invention uses functionalized tourmaline powder to modify polyester fibers. The functionalized tourmaline powder has good compatibility with polyester fibers and can be uniformly dispersed in the polyester fibers, improving the overall performance of the polyester fibers. At the same time, it retains the waterproof and oil-proof functions of the polyester fibers themselves. The antibacterial modified polyester fibers obtained by this invention have good mechanical properties, flame retardant properties and antibacterial properties, especially strong antibacterial durability. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] In the technical solution of this invention, all raw materials used are commercially available products. The polyester powder and polyester chips are purchased from Sinopec Yizheng Chemical Fiber Co., Ltd., with the grade FG650. The particle size of the tourmaline powder is 500 nm. The CAS number of epichlorohydrin is 106-89-8; the CAS number of diethylphosphonochloride is 589-57-1; the CAS number of triethylamine is 121-44-8; the CAS number of triphenylphosphine is 603-35-0; the CAS number of 3-aminopropyltriethoxysilane is 919-30-2; the CAS number of ethanol is 64-17-5; the CAS number of chloroform is 67-66-3; and the CAS number of N,N-dimethylformamide is 68-12-2.

[0029] Example 1

[0030] A method for preparing antibacterial modified polyester fiber includes the following steps:

[0031] S1. Functionalized tourmaline powder and polyester powder are mixed evenly and granulated through a twin-screw extruder to obtain modified polyester masterbatch; the mass ratio of functionalized tourmaline powder to polyester powder is 1:3; the granulation process includes melt blending, extrusion molding, cooling and pelletizing, and the temperature of the twin-screw extruder is 260℃.

[0032] S2. After drying the modified polyester masterbatch and polyester chips, mix them evenly and spin them through a melt spinning machine to obtain antibacterial modified polyester fibers. The mass ratio of modified polyester masterbatch to polyester chips is 1:4. The spinning process includes spinning, cooling and oiling, pre-drawing, winding, and drawing. The traction ratio is 2, the spinning speed is 2600m / min, and the spinning temperature is 285℃.

[0033] The preparation method of functionalized tourmaline powder is as follows:

[0034] (1) Add tourmaline powder to the mixed solvent and stir evenly. Add 3-aminopropyltriethoxysilane dropwise at 70°C. After the addition is complete, continue stirring for 2 hours. After the reaction is complete, centrifuge and wash and dry the solid to obtain aminated tourmaline powder. The mass ratio of tourmaline powder to 3-aminopropyltriethoxysilane is 1:0.4. The mixed solvent is ethanol and water with a mass ratio of 1:3.

[0035] (2) Add the aminated tourmaline powder to anhydrous chloroform and stir until homogeneous. At a temperature of 40°C, slowly add epichlorohydrin dropwise. After the addition is complete, continue stirring for 4 hours. Then, place the mixture in an ice bath and add triethylamine first, followed by diethylphosphorous chloride dropwise. After the addition is complete, keep the mixture warm for 3 hours. After the reaction is complete, centrifuge the mixture. The solid is washed and dried to obtain modified tourmaline powder. The mass ratio of aminated tourmaline powder, epichlorohydrin, diethylphosphorous chloride, and triethylamine is 1:0.5:0.8:0.6.

[0036] (3) Add the modified tourmaline powder to N,N-dimethylformamide and stir until uniform. Add triphenylphosphine at 120°C and continue stirring for 22 hours. After the reaction is complete, centrifuge and wash and dry the solid to obtain functionalized tourmaline powder. The mass ratio of modified tourmaline powder to triphenylphosphine is 1:1.

[0037] Example 2

[0038] A method for preparing antibacterial modified polyester fiber includes the following steps:

[0039] S1. Functionalized tourmaline powder and polyester powder are mixed evenly and granulated through a twin-screw extruder to obtain modified polyester masterbatch; the mass ratio of functionalized tourmaline powder to polyester powder is 1:4; the granulation process includes melt blending, extrusion molding, cooling and pelletizing, and the temperature of the twin-screw extruder is 270℃.

[0040] S2. After drying the modified polyester masterbatch and polyester chips, mix them evenly and spin them through a melt spinning machine to obtain antibacterial modified polyester fibers. The mass ratio of modified polyester masterbatch to polyester chips is 1:5. The spinning process includes spinning, cooling and oiling, pre-drawing, winding, and drawing. The traction ratio is 2, the spinning speed is 2500m / min, and the spinning temperature is 290℃.

[0041] The preparation method of functionalized tourmaline powder is as follows:

[0042] (1) Add tourmaline powder to the mixed solvent and stir evenly. Add 3-aminopropyltriethoxysilane dropwise at 60°C. After the addition is complete, continue stirring for 3 hours. After the reaction is complete, centrifuge and wash and dry the solid to obtain aminated tourmaline powder. The mass ratio of tourmaline powder to 3-aminopropyltriethoxysilane is 1:0.3. The mixed solvent is ethanol and water with a mass ratio of 1:2.5.

[0043] (2) Add the aminated tourmaline powder to anhydrous chloroform and stir until homogeneous. At a temperature of 35°C, slowly add epichlorohydrin dropwise. After the addition is complete, continue stirring for 5 hours. Then, place the mixture in an ice bath and add triethylamine first, followed by diethylphosphite chloride dropwise. After the addition is complete, keep the mixture warm for 2.5 hours. After the reaction is complete, centrifuge the mixture. The solid is washed and dried to obtain modified tourmaline powder. The mass ratio of aminated tourmaline powder, epichlorohydrin, diethylphosphite chloride, and triethylamine is 1:0.4:0.7:0.5.

[0044] (3) Add the modified tourmaline powder to N,N-dimethylformamide and stir evenly. Add triphenylphosphine at 115°C and continue stirring for 24 hours. After the reaction is completed, centrifuge and wash and dry the solid to obtain functionalized tourmaline powder. The mass ratio of modified tourmaline powder to triphenylphosphine is 1:0.8.

[0045] Example 3

[0046] A method for preparing antibacterial modified polyester fiber includes the following steps:

[0047] S1. Functionalized tourmaline powder and polyester powder are mixed evenly and granulated through a twin-screw extruder to obtain modified polyester masterbatch; the mass ratio of functionalized tourmaline powder to polyester powder is 1:3.5; the granulation process includes melt blending, extrusion molding, cooling and pelletizing, and the temperature of the twin-screw extruder is 265℃.

[0048] S2. After drying the modified polyester masterbatch and polyester chips, mix them evenly and spin them through a melt spinning machine to obtain antibacterial modified polyester fibers. The mass ratio of modified polyester masterbatch to polyester chips is 1:4.5. The spinning process includes spinning, cooling and oiling, pre-drawing, winding, and drawing. The traction ratio is 2, the spinning speed is 2550m / min, and the spinning temperature is 280℃.

[0049] The preparation method of functionalized tourmaline powder is as follows:

[0050] (1) Add tourmaline powder to the mixed solvent and stir evenly. Add 3-aminopropyltriethoxysilane dropwise at 65°C. After the addition is complete, continue stirring for 2.5 h. After the reaction is complete, centrifuge and wash and dry the solid to obtain aminated tourmaline powder. The mass ratio of tourmaline powder to 3-aminopropyltriethoxysilane is 1:0.35. The mixed solvent is ethanol and water with a mass ratio of 1:2.

[0051] (2) Add the aminated tourmaline powder to anhydrous chloroform and stir until homogeneous. At a temperature of 38°C, slowly add epichlorohydrin dropwise. After the addition is complete, continue stirring for 4.5 h. Then, place the mixture in an ice bath and add triethylamine first, followed by diethylphosphorous chloride dropwise. After the addition is complete, keep the mixture warm for 2 h. After the reaction is complete, centrifuge the mixture. The solid is washed and dried to obtain modified tourmaline powder. The mass ratio of aminated tourmaline powder, epichlorohydrin, diethylphosphorous chloride, and triethylamine is 1:0.45:0.75:0.55.

[0052] (3) Add the modified tourmaline powder to N,N-dimethylformamide and stir until uniform. Add triphenylphosphine at 116°C and continue stirring for 23 hours. After the reaction is complete, centrifuge and wash and dry the solid to obtain functionalized tourmaline powder. The mass ratio of modified tourmaline powder to triphenylphosphine is 1:0.9.

[0053] Example 4

[0054] A method for preparing antibacterial modified polyester fiber includes the following steps:

[0055] S1. Functionalized tourmaline powder and polyester powder are mixed evenly and granulated through a twin-screw extruder to obtain modified polyester masterbatch; the mass ratio of functionalized tourmaline powder to polyester powder is 1:3; the granulation process includes melt blending, extrusion molding, cooling and pelletizing, and the temperature of the twin-screw extruder is 270℃.

[0056] S2. After drying the modified polyester masterbatch and polyester chips, mix them evenly and spin them through a melt spinning machine to obtain antibacterial modified polyester fibers. The mass ratio of modified polyester masterbatch to polyester chips is 1:5. The spinning process includes spinning, cooling and oiling, pre-drawing, winding, and drawing. The traction ratio is 2, the spinning speed is 2600m / min, and the spinning temperature is 280℃.

[0057] The preparation method of functionalized tourmaline powder is as follows:

[0058] (1) Add tourmaline powder to the mixed solvent and stir evenly. Add 3-aminopropyltriethoxysilane dropwise at 70°C. After the addition is complete, continue stirring for 2.5 h. After the reaction is complete, centrifuge and wash and dry the solid to obtain aminated tourmaline powder. The mass ratio of tourmaline powder to 3-aminopropyltriethoxysilane is 1:0.4. The mixed solvent is ethanol and water with a mass ratio of 1:2.

[0059] (2) Add the aminated tourmaline powder to anhydrous chloroform and stir until homogeneous. At a temperature of 35°C, slowly add epichlorohydrin dropwise. After the addition is complete, continue stirring for 4 hours. Then, place the mixture in an ice bath and add triethylamine first, followed by diethylphosphorous chloride dropwise. After the addition is complete, keep the mixture warm for 2.5 hours. After the reaction is complete, centrifuge the mixture. The solid is washed and dried to obtain modified tourmaline powder. The mass ratio of aminated tourmaline powder, epichlorohydrin, diethylphosphorous chloride, and triethylamine is 1:0.4:0.7:0.6.

[0060] (3) Add the modified tourmaline powder to N,N-dimethylformamide and stir evenly. Add triphenylphosphine at 120°C and continue stirring for 24 hours. After the reaction is completed, centrifuge and wash and dry the solid to obtain functionalized tourmaline powder. The mass ratio of modified tourmaline powder to triphenylphosphine is 1:0.8.

[0061] Comparative Example 1

[0062] Compared with Example 1, this comparative example uses modified tourmaline powder in step S1.

[0063] A method for preparing antibacterial modified polyester fiber includes the following steps:

[0064] S1. The modified tourmaline powder and polyester powder are mixed evenly and granulated through a twin-screw extruder to obtain modified polyester masterbatch; the mass ratio of functionalized tourmaline powder to polyester powder is 1:3; the granulation process includes melt blending, extrusion molding, cooling and pelletizing, and the temperature of the twin-screw extruder is 260℃.

[0065] S2. After drying the modified polyester masterbatch and polyester chips, mix them evenly and spin them through a melt spinning machine to obtain antibacterial modified polyester fibers. The mass ratio of modified polyester masterbatch to polyester chips is 1:4. The spinning process includes spinning, cooling and oiling, pre-drawing, winding, and drawing. The traction ratio is 2, the spinning speed is 2600m / min, and the spinning temperature is 285℃.

[0066] The preparation method of modified tourmaline powder is as follows:

[0067] (1) Same as step (1) in Example 1;

[0068] (2) Same as step (2) in Example 1.

[0069] Comparative Example 2

[0070] Compared with Example 1, this comparative example uses aminated tourmaline powder in step S1.

[0071] A method for preparing antibacterial modified polyester fiber includes the following steps:

[0072] S1. Aminated tourmaline powder and polyester powder are mixed evenly and granulated through a twin-screw extruder to obtain modified polyester masterbatch; the mass ratio of functionalized tourmaline powder to polyester powder is 1:3; the granulation process includes melt blending, extrusion molding, cooling and pelletizing, and the temperature of the twin-screw extruder is 260℃.

[0073] S2. After drying the modified polyester masterbatch and polyester chips, mix them evenly and spin them through a melt spinning machine to obtain antibacterial modified polyester fibers. The mass ratio of modified polyester masterbatch to polyester chips is 1:4. The spinning process includes spinning, cooling and oiling, pre-drawing, winding, and drawing. The traction ratio is 2, the spinning speed is 2600m / min, and the spinning temperature is 285℃.

[0074] The preparation method of aminated tourmaline powder is the same as step (1) in Example 1.

[0075] Comparative Example 3

[0076] Compared with Example 1, this comparative example uses tourmaline powder in step S1.

[0077] A method for preparing antibacterial modified polyester fiber includes the following steps:

[0078] S1. Tourmaline powder and polyester powder are mixed evenly and granulated through a twin-screw extruder to obtain modified polyester masterbatch; the mass ratio of functionalized tourmaline powder to polyester powder is 1:3; the granulation process includes melt blending, extrusion molding, cooling and pelletizing, and the temperature of the twin-screw extruder is 260℃.

[0079] S2. After drying the modified polyester masterbatch and polyester chips, mix them evenly and spin them through a melt spinning machine to obtain antibacterial modified polyester fibers. The mass ratio of modified polyester masterbatch to polyester chips is 1:4. The spinning process includes spinning, cooling and oiling, pre-drawing, winding, and drawing. The traction ratio is 2, the spinning speed is 2600m / min, and the spinning temperature is 285℃.

[0080] Test case

[0081] The mechanical properties, flame retardant properties, and antibacterial durability of the antibacterial modified polyester fibers prepared in Examples 1 to 4 and Comparative Examples 1 to 3 were tested. The breaking strength was tested according to GB / T 14344-2022 "Test Method for Tensile Properties of Chemical Fiber Filaments"; the flame retardant properties were tested according to FZ / T 50017-2011 "Test Method for Flame Retardant Properties of Polyester Fibers: Oxygen Index Method"; and the antibacterial properties were tested according to GB / T 20944.3-2008 "Evaluation of Antibacterial Properties of Textiles - Part 3: Vibration Method". The test results are shown in Table 1.

[0082] Table 1

[0083]

[0084] As shown in Table 1, the antibacterial modified polyester fibers prepared in Examples 1 to 4 of the present invention have higher breaking strength, limiting oxygen index, and antibacterial rates against Staphylococcus aureus and Escherichia coli before and after washing than those in Comparative Examples 1 to 3. This indicates that the antibacterial modified polyester fibers prepared in the present invention have good mechanical properties, flame retardant properties, and antibacterial properties, especially strong antibacterial durability.

[0085] By comparing Example 1 with Comparative Examples 1 to 3, it can be seen that in Example 1 of the present invention, functionalized tourmaline powder is used to modify polyester fibers. The surface of the functionalized tourmaline powder is grafted with phosphate ester groups and quaternary phosphonium salt groups, both of which have flame retardant effects and can synergistically improve the flame retardant performance of polyester fibers. At the same time, the quaternary phosphonium salt groups also have antibacterial effects. Tourmaline powder can achieve antibacterial effect by continuously releasing negative ions. The quaternary phosphonium salt groups can also cooperate with tourmaline powder to jointly improve the antibacterial performance of polyester fibers, so that polyester fibers still maintain a high antibacterial rate after multiple washes. The functionalized tourmaline powder obtained by the tourmaline powder of the present invention after a series of organic modifications has better compatibility with polyester fibers and helps to improve the mechanical properties of polyester fibers.

[0086] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for producing an antibacterial modified polyester fiber, characterized by, It comprises the following steps: S1, the functionalized tourmaline powder and polyester powder are mixed uniformly, granulated through a double screw extruder, and modified polyester granules are obtained; S2, the modified polyester granules and polyester chips are dried and uniformly mixed, and antibacterial modified polyester fibers are obtained by spinning through a melt spinning machine; The preparation method of the functionalized tourmaline powder in step S1 is as follows: (1) The tourmaline powder is added to a mixed solvent, stirred uniformly, and 3-aminopropyl triethoxysilane is added dropwise at a temperature of 60-70℃, and after dropping, the stirring is continued for 2-3h to obtain aminated tourmaline powder; (2) The aminated tourmaline powder is added to anhydrous chloroform, stirred uniformly, and epichlorohydrin is slowly added dropwise at a temperature of 35-40℃, and after dropping, the stirring is continued for 4-5h, and then it is placed in an ice bath, triethylamine is first added, and then diethyl phosphorochloridite is added dropwise, and after dropping, the reaction is continued for 2-3h to obtain modified tourmaline powder; (3) The modified tourmaline powder is added to N,N-dimethylformamide, stirred uniformly, and triphenylphosphine is added at a temperature of 115-120℃, and the stirring is continued for 22-24h to obtain functionalized tourmaline powder.

2. The method of claim 1, wherein the modified polyester fiber is an antibacterial modified polyester fiber. The mass ratio of the functionalized tourmaline powder and the polyester powder in step S1 is 1:3-4.

3. The method of claim 1, wherein the modified polyester fiber is an antibacterial modified polyester fiber. The temperature of the double screw extruder in step S1 is 260-270℃.

4. The method of claim 1, wherein the modified polyester fiber is an antibacterial modified polyester fiber. The mass ratio of the modified polyester granules and the polyester chips in step S2 is 1:4-5.

5. The method of claim 1, wherein the modified polyester fiber is an antibacterial modified polyester fiber. The spinning speed in step S2 is 2500-2600m / min, and the spinning temperature is 280-290℃.

6. The method of claim 1, wherein the modified polyester fiber is an antibacterial modified polyester fiber. The mass ratio of the tourmaline powder and 3-aminopropyl triethoxysilane in step (1) is 1:0.3-0.4; the mixed solvent is ethanol and water with a mass ratio of 1:2-3.

7. The method of claim 1, wherein the modified polyester fiber is an antibacterial modified polyester fiber. The mass ratio of the aminated tourmaline powder, epichlorohydrin, diethyl phosphorochloridite, and triethylamine in step (2) is 1:0.4-0.5:0.7-0.8:0.5-0.

6.

8. The method of claim 1, wherein the modified polyester fiber is an antibacterial modified polyester fiber. The mass ratio of the modified tourmaline powder and triphenylphosphine in step (3) is 1:0.8-1.

9. An antibacterial modified polyester fiber, characterized by, An antibacterial modified polyester fiber is prepared by the preparation method of any one of claims 1-8.

10. A fabric comprising an antibacterial modified polyester fiber, characterized in that, The antibacterial modified polyester fiber of claim 9 is included.

Images