Negative ion polyester fiber, preparation method thereof and textile

Abstract

The invention belongs to the technical field of textiles, and particularly relates to a negative ion polyester fiber, a preparation method thereof and a textile. The negative ion polyester fiber is formed by spinning a polyester fiber raw material and a negative ion composite material, the negative ion composite material comprises a membrane material and a nanometer negative ion material wrapped in the membrane material, the membrane material is prepared from raw materials including a degradable membrane-forming material and a cross-linking agent, the degradable membrane-forming material contains hydroxyl, and the cross-linking agent contains an epoxy group. According to the negative ion composite material and the preparation method thereof, the negative ion composite material with the core-shell structure is prepared by taking the nano negative ion material as the core material and taking a film-like cross-linked product generated by a cross-linking reaction between an epoxy group of the cross-linking agent and a hydroxyl group of the degradable film-forming material as the wall material, so that the negative ion generation capability and the washing resistance of the negative ion composite material are improved; and the safety and the environmental protection property of the negative ion composite material are improved through the degradable film-forming material.

Description

Technical Field

[0001] The present invention belongs to the technical field of textiles, and particularly relates to a negative ion polyester fiber, a preparation method thereof, and a textile. Background Art

[0002] With the development of technology and the improvement of living standards, people have higher and higher requirements for textiles. More and more users put forward more requirements for the functionality of textiles, such as comfort, health, heat preservation, quick moisture absorption and drying, waterproof and moisture permeable, coolness, antibacterial property, environmental protection, etc. To meet the above needs, functional fibers have been developed. Functional fibers refer to fibers that have certain special functions in addition to the existing properties of the fibers, such as negative oxygen ion (hereinafter referred to as negative ion) fibers, temperature regulating and heat preserving fibers, bioactive fibers, biodegradable fibers, elastic fibers, high emissivity far-infrared fibers, antibacterial and deodorant fibers, flame retardant fibers, radiation-proof fibers, etc.

[0003] Negative ion fibers are fibers with the function of releasing negative ions. The negative ions released by these fibers have an obvious effect on improving air quality and the environment. In particular, the health care effect of negative ions on the human body has been increasingly accepted by people. The preparation of negative ion fibers is mainly achieved by adding a nano negative ion material with the function of releasing negative ions during the fiber production process. The electrons emitted by these nano negative ion materials hit the oxygen molecules around the fibers, making them into negatively charged ions.

[0004] However, traditional nano negative ion materials (such as TiO, ZnO, etc.) have potential environmental hazards and health risks, and are non-degradable; the negative ion polyester fibers made of nano negative ion materials have poor washability. After being washed many times, the negative ion generation ability is significantly reduced. Summary of the Invention

[0005] In view of this, the present invention provides a negative ion polyester fiber, a preparation method thereof, and a textile to solve the above technical problems that traditional nano negative ion materials (such as TiO, ZnO, etc.) have potential environmental hazards and health risks, are non-degradable, the negative ion polyester fibers made of nano negative ion materials have poor washability, and the negative ion generation ability is significantly reduced after being washed many times.

[0006] To achieve the above solution, the technical solution of the present invention is as follows:

[0007] In a first aspect, the present application provides a negative ion polyester fiber, which is spun from a polyester fiber raw material and a negative ion composite material. The negative ion composite material includes a film material and a nano negative ion material encapsulated within the film material. The film material is prepared from raw materials including a degradable film-forming material and a cross-linking agent. The degradable film-forming material contains hydroxyl groups, and the cross-linking agent contains epoxy groups.

[0008] Optionally, the nano negative ion material is selected from at least one of tourmaline, hexacyclotite, and seagull stone.

[0009] Optionally, the particle size of the nano negative ion material is 10 - 60 nm, preferably 10 - 50 nm.

[0010] Optionally, the mass ratio of the degradable film-forming material to the nano negative ion material is 0.2 - 0.3:1 - 3, preferably 0.2 - 0.3:1.2 - 3.

[0011] Optionally, the mass ratio of the degradable film-forming material to the cross-linking agent is 0.2 - 0.3:0.3 - 0.4, preferably 0.2 - 0.3:0.32 - 0.4.

[0012] Optionally, the mass ratio of the negative ion composite material to polyester is 1 - 5:100, preferably 2 - 5:100.

[0013] Optionally, the degradable film-forming material is selected from chitosan, polylactic acid, or a combination of the two.

[0014] Optionally, the cross-linking agent is selected from at least one of propylene oxide, propylene oxide derivatives, butylene oxide, and butylene oxide derivatives.

[0015] In the present application, examples of propylene oxide derivatives include substances such as epichlorohydrin, and examples of butylene oxide derivatives include substances such as epichlorobutane.

[0016] Optionally, if the degradable film-forming material contains amino groups, the raw materials further include an amino protecting agent.

[0017] Optionally, the amino protecting agent is selected from at least one of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, and valeraldehyde.

[0018] Optionally, the mass ratio of the amino protecting agent to the degradable film-forming material is 1.5 - 2.5:0.2 - 0.3.

[0019] In a second aspect, the present application further provides a method for preparing the negative ion polyester fiber as described above, including the following steps:

[0020] S1. Dissolve the degradable film-forming material to obtain a degradable film-forming material solution;

[0021] S2. Mix the aqueous solution of the nano-negative ion material with the solution of the degradable film-forming material in a protective gas atmosphere, disperse ultrasonically, centrifuge, ultrasonically disperse the solid obtained by centrifugation in water to obtain an aqueous solution, raise the temperature, add the cross-linking agent, and adjust the pH to 11.5 - 12 to carry out the cross-linking reaction, and purify to obtain the negative ion composite material;

[0022] S3. Spin the polyester fiber raw material and the negative ion composite material into fibers to obtain the negative ion polyester fiber.

[0023] Optionally, in step S1, the solvents for dissolving the degradable film-forming material include but are not limited to substances such as acetic acid, citric acid, tributyl acetylcitrate, etc.

[0024] Optionally, in step S1, the concentration of the solution of the degradable film-forming material is 0.3 - 0.8 g / 100 mL, preferably 0.35 - 0.8 g / 100 mL.

[0025] Optionally, in step S2, raise the temperature to 75 - 85 °C, preferably 76 - 85 °C.

[0026] Optionally, in step S2, the duration of the cross-linking reaction is 2 - 5 h, preferably 2.5 - 5 h.

[0027] It should be understood that in this application, there is no restriction on the spinning method of the negative ion polyester fiber. For example, wet spinning process, melt spinning process, electrospinning process, etc. can be adopted. If the melt spinning process is selected, the polyester fiber raw material should be low-melting polyester chips, for example, polyester chips with a melting temperature lower than the decomposition temperature of the degradable film-forming material.

[0028] In the third aspect, this application also provides a textile, which is made of the negative ion polyester fiber as described above or the negative ion polyester fiber prepared according to the method as described above.

[0029] As described above, the negative ion polyester fiber, its preparation method and the textile of the present invention have the following beneficial effects:

[0030] In this application, using the nano-negative ion material as the core material and the film-like cross-linked product formed by the cross-linking reaction between the epoxy group carried by the cross-linking agent and the hydroxyl group carried by the degradable film-forming material as the wall material, a negative ion composite material with a core-shell structure is made, which improves the water-wash resistance of the negative ion generation ability of the negative ion composite material; and the safety and environmental friendliness of the negative ion composite material are improved by the degradable film-forming material.

[0031] In this application, chitosan and / or polylactic acid with antibacterial properties are used as the biodegradable film-forming materials, which can endow the negative ion polyester fiber made of the biodegradable film-forming materials with antibacterial properties. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the embodiment. Detailed Description of the Invention

[0033] The present invention will be further described below through specific specific examples. It should be noted that the specific material ratios, process conditions, results, etc. described in the embodiments of the present invention are only used to illustrate the present invention and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

[0034] One embodiment of the present application provides a negative ion polyester fiber, which is spun from a polyester fiber raw material and a negative ion composite material. The mass ratio of the negative ion composite material to the polyester fiber raw material is 1-5:100;

[0035] The negative ion composite material includes a film material and a nano negative ion material wrapped in the film material. The film material is prepared from raw materials including a biodegradable film-forming material and a crosslinking agent;

[0036] The biodegradable film-forming material is selected from chitosan, polylactic acid or a combination of the two;

[0037] The crosslinking agent is selected from at least one of propylene oxide, propylene oxide derivatives, butylene oxide and butylene oxide derivatives,

[0038] The mass ratio of the biodegradable film-forming material to the nano negative ion material is 0.2-0.3:1-3, and the mass ratio of the biodegradable film-forming material to the crosslinking agent is 0.2-0.3:0.3-0.4;

[0039] The nano negative ion material is selected from at least one of tourmaline, hexacyclic stone and seagull stone, and the particle size of the nano negative ion material is 10-60nm;

[0040] If the biodegradable film-forming material contains amino groups, the raw materials further include an amino protecting agent, which is selected from at least one of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde and valeraldehyde. The mass ratio of the amino protecting agent to the biodegradable film-forming material is 1.5-2.5:0.2-0.3.

[0041] Another embodiment of the present application also provides a method for preparing the negative ion polyester fiber as described above, including the following steps:

[0042] S1. Dissolve the biodegradable film-forming material to obtain a biodegradable film-forming material solution with a concentration of 0.3-0.8 g / 100 mL;

[0043] S2. In a protective gas atmosphere, mix the aqueous solution of the nano anionic material with the solution of the degradable film-forming material, ultrasonically disperse, centrifuge, ultrasonically disperse the solid obtained by centrifugation in water to obtain an aqueous solution, heat up to 75 - 85 °C, add a crosslinking agent, adjust the pH to 11.5 - 12, and carry out a crosslinking reaction for 2 - 5 h, then purify to obtain the anionic composite material;

[0044] S3. Spin the polyester fiber raw material and the anionic composite material into fibers to obtain anionic polyester fibers.

[0045] Another embodiment of the present application also provides a textile, which is made of the anionic polyester fiber as described above or the anionic polyester fiber prepared according to the method as described above.

[0046] The following specifically illustrates the present invention through specific exemplary embodiments. It should also be understood that the following embodiments are only used to specifically illustrate the present invention and cannot be construed as limiting the protection scope of the present invention. Those skilled in the art's non-essential improvements and adjustments made based on the above content of the present invention all fall within the protection scope of the present invention. The specific process parameters and the like in the following examples are also only an example within a suitable range, that is, those skilled in the art can make selections within a suitable range through the description in this article, rather than being limited to the specific values in the following examples.

[0047] It should be understood that in the following embodiments, only the specific cases of using chitosan as the degradable film-forming material, tourmaline as the nano anionic material, epichlorohydrin as the crosslinking agent, and formaldehyde as the amino protecting agent are listed. Those skilled in the art can also select other degradable film-forming materials other than chitosan, such as polylactic acid, etc., other nano anionic materials other than tourmaline, such as six-ring stone, seagull stone, etc., other crosslinking agents other than epichlorohydrin, such as epichlorohydrin derivatives, epoxy butane, epichlorobutane, etc., and other amino protecting agents other than formaldehyde, such as acetaldehyde, propionaldehyde, butyraldehyde, valeraldehyde, etc.

[0048] Example 1

[0049] A preparation method of anionic polyester fibers, the specific steps are as follows:

[0050] S1. Crush tourmaline to 50 nm by ball milling to obtain nano-sized tourmaline particles;

[0051] Dissolve chitosan (CTS) in a dilute acetic acid solution (concentration of 1 wt%) to obtain a chitosan solution with a concentration of 0.5 g / 100 mL;

[0052] S2. Take 2 g of nano-tourmaline particles and place them in a Schlenk flask. Evacuate the Schlenk flask and fill it with nitrogen. Repeat the evacuation and nitrogen filling three times. Inject 150 mL of deionized water into the Schlenk flask and ultrasonically treat for 30 min. Subsequently, inject 50 mL of chitosan solution into the Schlenk flask, stir well, and ultrasonically disperse for 10 min. During this process, due to the presence of charged crystal units on the surface of tourmaline, chitosan is adsorbed on the surface of tourmaline under electrostatic action (as Figure 1 shown);

[0053] Centrifuge to separate and remove the supernatant. Wash the obtained solid twice with deionized water. Then place the solid in 250 mL of deionized water and ultrasonically disperse for 10 min. Transfer the re-dispersed solution to a 500 mL round-bottom flask, heat to 60 °C, add 2 mL of formaldehyde under rapid stirring, react for 2 h, then heat to 80 °C, add 320 μL of epichlorohydrin, and adjust the pH to 12 with 0.1 mol / L NaOH solution and react for 3 h. During this process, the hydrogen atom on the α-amino group of chitosan itself undergoes dehydration condensation with the oxygen atom in formaldehyde to form a chitosan derivative containing a carbon-nitrogen double bond; the hydroxyl group in the chitosan derivative undergoes a cross-linking reaction with the epoxy group in epichlorohydrin to form a cross-linked product (as Figure 1 shown);

[0054] After the reaction, perform magnetic separation. Wash the separated solid twice with deionized water. Add 150 mL of 4 wt% hydrochloric acid solution, soak for 4 h and then perform magnetic separation. Then add 150 mL of 5 wt% sodium hydroxide solution to the separated solid and soak for 8 h, followed by magnetic separation to obtain chitosan-coated tourmaline nanoparticles (i.e., negative ion composite material). Wash with deionized water until the pH = 7 and re-disperse in deionized water to obtain a 5 wt% negative ion composite material solution. During this process, the carbon-nitrogen double bond in the cross-linked product hydrolyzes into an amino group in the hydrochloric acid solution, and the sodium hydroxide solution neutralizes the acid on the surface of the solid obtained by magnetic separation to purify the product;

[0055] S3. Add the negative ion composite material solution to a 15 wt% polyethylene terephthalate solution (i.e., spinning dope, the solvent is composed of trifluoroacetic acid and dichloromethane in a mass ratio of 6:4). The mass ratio of the negative ion composite material to polyethylene terephthalate is 3:100. Use the wet spinning process to prepare polyester fibers to obtain negative ion polyester fibers.

[0056] Example 2

[0057] A method for preparing negative ion polyester fibers, the specific steps are as follows:

[0058] S1. Crush tourmaline to 10 nm by ball milling to obtain nano-sized tourmaline particles;

[0059] Dissolve chitosan (CTS) in a dilute acetic acid solution (concentration 1 wt%) to obtain a chitosan solution with a concentration of 0.8 g / 100 mL;

[0060] S2. Place 1 g of nano-tourmaline particles in a Schlenk flask, evacuate the Schlenk flask and fill it with nitrogen, repeat evacuation and filling with nitrogen three times, inject 150 mL of deionized water into the Schlenk flask, sonicate for 30 min, then inject 50 mL of the chitosan solution into the Schlenk flask, stir well, and ultrasonically disperse for 10 min;

[0061] Centrifuge to remove the supernatant, wash the obtained solid twice with deionized water, then place the solid in 250 mL of deionized water, ultrasonically disperse for 10 min, transfer the redispersed solution to a 500 mL round-bottom flask, heat to 65 °C, add 2 mL of formaldehyde under rapid stirring, react for 3 h, heat to 75 °C, add 320 μL of epichlorohydrin, and adjust the pH to 12 with a 0.1 mol / L NaOH solution, react for 2 h;

[0062] After the reaction, perform magnetic separation, wash the separated solid twice with deionized water, add 150 mL of a 4 wt% hydrochloric acid solution, soak for 4 h and then perform magnetic separation, then add 150 mL of a 5 wt% sodium hydroxide solution and soak for 8 h, perform magnetic separation to obtain chitosan-coated tourmaline nanoparticles (i.e., negative ion composite material), wash with deionized water until the pH is 7, and redisperse in deionized water to obtain a 5 wt% negative ion composite material solution;

[0063] S3. Add the negative ion composite material solution to a 20 wt% polyethylene terephthalate solution (i.e., spinning dope, the solvent consists of trifluoroacetic acid and dichloromethane in a mass ratio of 6:4) with a mass ratio of the negative ion composite material to polyethylene terephthalate of 1:100, and use the wet spinning process to prepare polyester fibers to obtain negative ion polyester fibers.

[0064] Example 3

[0065] A method for preparing negative ion polyester fibers, the specific steps are as follows:

[0066] S1. Crush tourmaline to 60 nm by ball milling to obtain nano-sized tourmaline particles;

[0067] Dissolve chitosan (CTS) in a dilute acetic acid solution (concentration 1 wt%) to obtain a chitosan solution with a concentration of 0.3 g / 100 mL;

[0068] S2. Place 3 g of nano-tourmaline particles in a Schlenk flask. Evacuate the Schlenk flask and fill it with nitrogen. Repeat the evacuation and nitrogen filling three times. Inject 150 mL of deionized water into the Schlenk flask, and ultrasonically treat it for 30 min. Then inject 50 mL of chitosan solution into the Schlenk flask, stir well, and ultrasonically disperse for 10 min;

[0069] Centrifuge to separate and remove the supernatant. Wash the obtained solid twice with deionized water. Then place the solid in 250 mL of deionized water and ultrasonically disperse for 10 min. Transfer the re-dispersed solution to a 500 mL round-bottom flask, heat up to 55 °C, add 2 mL of formaldehyde under rapid stirring, react for 1 h, heat up to 85 °C, add 320 μL of epichlorohydrin, and adjust the pH to 12 with a 0.1 mol / L NaOH solution, and react for 4 h;

[0070] After the reaction, perform magnetic separation. Wash the separated solid twice with deionized water. Add 150 mL of 4 wt% hydrochloric acid solution, soak for 4 h and then perform magnetic separation. Then add 150 mL of 5 wt% sodium hydroxide solution and soak for 8 h, and perform magnetic separation to obtain tourmaline nanoparticles coated with chitosan (i.e., the negative ion composite material). Wash with deionized water until the pH is 7, and re-disperse in deionized water to obtain a 5 wt% negative ion composite material solution;

[0071] S3. Add the negative ion composite material solution to a 12 wt% polyethylene terephthalate solution (i.e., the spinning dope, the solvent is composed of trifluoroacetic acid and dichloromethane in a mass ratio of 6:4). The mass ratio of the negative ion composite material to polyethylene terephthalate is 5:100. Use the wet spinning process to prepare polyester fibers, and obtain negative ion polyester fibers.

[0072] That is, the difference between this comparative example and Example 1 is that the negative ion composite material solution was not added to the spinning dope.

[0073] Comparative Example 1

[0074] Except for the following conditions, prepare polyester fibers in the same manner as in Example 1:

[0075] S3. Use a wet spinning process to prepare polyester fibers from a 15 wt% polyethylene terephthalate solution (i.e., the spinning dope, the solvent is composed of trifluoroacetic acid and dichloromethane in a mass ratio of 6:4).

[0076] Comparative Example 2

[0077] Except for the following conditions, prepare polyester fibers in the same manner as in Example 1:

[0078] S2. Place 2 g of nano-tourmaline particles in a Schlenk flask. Evacuate the Schlenk flask and fill it with nitrogen. Repeat the evacuation and nitrogen filling three times. Inject 150 mL of deionized water into the Schlenk flask and ultrasonically treat for 30 min.

[0079] Centrifuge to separate and remove the supernatant. Wash the obtained solid twice with deionized water. Then place the solid in 250 mL of deionized water and ultrasonically disperse for 10 min. Transfer the redispersed solution to a 500 mL round-bottom flask. Heat to 60 °C and add 2 mL of formaldehyde under rapid stirring. React for 2 h. Heat to 80 °C, add 320 μL of epichlorohydrin, and adjust the pH to 12 with a 0.1 mol / L NaOH solution. React for 3 h.

[0080] After the reaction, perform magnetic separation. Wash the separated solid twice with deionized water. Add 150 mL of a 4 wt% hydrochloric acid solution and soak for 4 h, then perform magnetic separation. Then add 150 mL of a 5 wt% sodium hydroxide solution and soak for 8 h, followed by magnetic separation to obtain chitosan-coated tourmaline nanoparticles (i.e., the negative ion composite material). Wash with deionized water until the pH = 7 and redisperse in deionized water to obtain a 5 wt% negative ion composite material solution.

[0081] That is, the difference between this comparative example and Example 1 is that chitosan was not added during the preparation of the negative ion composite material.

[0082] Performance testing

[0083] Make the negative ion polyester fibers prepared in Example 1 and Comparative Examples 1-2 into fabrics respectively. Use a negative ion detector to test the negative ion release amount of each fabric, and use the agar diffusion method to test the antibacterial rate of each fabric against Escherichia coli (ATCC 11229) and Staphylococcus aureus (ATCC6538). The results are shown in Table 1.

[0084] After washing 50 times, test the negative ion release amount of each fabric again, as well as the antibacterial rate against Escherichia coli and Staphylococcus aureus. The results are shown in Table 1.

[0085] Table 1 Test results

[0086]

[0087] As can be seen from Table 1, compared with Comparative Example 1, the negative ion concentration and the antibacterial rate against Escherichia coli and Staphylococcus aureus in Example 1 are both significantly improved. This result shows that in this application, using antibacterial chitosan and / or polylactic acid as the biodegradable film-forming material can endow the negative ion polyester fiber made of the biodegradable film-forming material with antibacterial properties, and the negative ion polyester fiber made of tourmaline as the raw material has excellent negative ion generation ability.

[0088] As can be seen from Table 1, after washing, the negative ion concentration of the fabric made of the polyester fiber in Comparative Example 2 and the antibacterial rates against Escherichia coli and Staphylococcus aureus both decreased significantly, while there were no significant differences in the negative ion concentration of the fabric made of the polyester fiber in Example 1 and the antibacterial rates against Escherichia coli and Staphylococcus aureus. This result indicates that using the nano-negative ion material as the core material and the film-like cross-linked product formed by the cross-linking reaction between the epoxy groups carried by the cross-linking agent and the hydroxyl groups carried by the degradable film-forming material as the wall material to make a negative ion composite material with a core-shell structure can improve the water-wash resistance of the negative ion generation ability of the negative ion composite material.

[0089] The above embodiments merely illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A negative ion polyester fiber, characterized in that: The negative ion polyester fiber is spun from polyester fiber raw material and negative ion composite material, the negative ion composite material includes a membrane material and a nano negative ion material wrapped in the membrane material, the membrane material is prepared from raw materials including a degradable film-forming material and a cross-linking agent, the degradable film-forming material contains hydroxyl groups, and the cross-linking agent contains epoxy groups.

2. The negative ion polyester fiber according to claim 1, characterized in that: The nanometer negative ion material is selected from at least one of tourmaline, hexagram stone and seagull stone; And / or, the particle size of the nano negative ion material is 10-60nm.

3. The negative ion polyester fiber according to claim 1, characterized in that: The mass ratio of the degradable film-forming material to the nano-anion material is 0.2-0.3:1-3; And / or, the mass ratio of the degradable film-forming material to the cross-linking agent is 0.2-0.3:0.3-0.

4.

4. The negative ion polyester fiber according to claim 1, characterized in that: The mass ratio of the negative ion composite material to the polyester is 1-5:100; And / or, the degradable film-forming material is selected from chitosan or polylactic acid or a combination of the two; And / or, the cross-linking agent is selected from at least one of propylene oxide, propylene oxide derivatives, butylene oxide and butylene oxide derivatives.

5. The negative ion polyester fiber according to claim 1, characterized in that: If the degradable film-forming material contains amino groups, the raw materials also include an amino protective agent.

6. The negative ion polyester fiber according to claim 5, characterized in that: The amino protective agent is selected from at least one of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde and valeraldehyde; And / or, the mass ratio of the amino protective agent to the degradable film-forming material is 1.5-2.5:0.2-0.

3.

7. The method for preparing the negative ion polyester fiber according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. dissolving the degradable film-forming material to obtain a degradable film-forming material solution; S2. In a protective gas atmosphere, the aqueous solution of the nano-anion material is mixed with the degradable film-forming material solution, ultrasonically dispersed, centrifuged, and the solid obtained by centrifugation is ultrasonically dispersed in water to obtain an aqueous solution, heated, added with the crosslinking agent, adjusted to pH 11.5-12, to carry out a crosslinking reaction, purified, and obtained the anion composite material; S3. Spinning the polyester fiber raw material and the negative ion composite material into fibers to obtain the negative ion polyester fiber.

8. The method for preparing the negative ion polyester fiber according to claim 7, characterized in that: In step S1, the concentration of the degradable film-forming material solution is 0.3-0.8 g / 100 mL.

9. The method for preparing the negative ion polyester fiber according to claim 7, characterized in that: In step S2, the temperature is raised to 75-85°C; And / or, in step S2, the duration of the cross-linking reaction is 2-5 hours.

10. A textile, characterized in that: The textile is made of the negative ion polyester fiber according to any one of claims 1 to 6 or the negative ion polyester fiber prepared according to the method according to any one of claims 7 to 9.

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