Sixteen-hole multifunctional polyester staple fiber and preparation method thereof

Abstract

The invention discloses a sixteen-hole multifunctional polyester staple fiber and a preparation method thereof, and relates to the technical field of functional fibers. Sodium alginate is used as a skin layer, polyethylene glycol terephthalate is used as a core layer, functional layering is achieved through skin-core compounding, and the interface bonding force between sodium alginate and polyethylene glycol terephthalate is enhanced through glutaraldehyde; in the melting processing process of polyethylene glycol terephthalate, a chain extender is used for reducing the melting point of the polyethylene glycol terephthalate so as to reduce the pyrolysis risk of sodium alginate, meanwhile, a low-polarity lubricant is used for grafting zirconium carbide so as to balance the lubrication and enhancement functions and realize far infrared and antistatic properties, and then an aniline monomer is initiated to polymerize on the surface of zirconium carbide so as to prepare the far infrared anti-static polyethylene glycol terephthalate composite material. Seaweed-carbon can generate far infrared radiation and negative ions, and zirconium carbide can be used as an electron acceptor to enhance the carrier mobility, so that the far infrared and antistatic properties of the fiber are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of functional fibers, in particular to a sixteen-hole multifunctional polyester staple fiber and a preparation method thereof. Background Art

[0002] At present, single-function finishing of textiles is not uncommon, such as flame retardant, waterproof, oil-repellent, weather-resistant and other functional finishing, and the corresponding finishing technology is becoming more and more mature.

[0003] To adapt to the rapidly evolving textile market, especially in specialized sectors such as tourism, transportation, industrial fabrics, aerospace, and military applications, single-function textiles are far from sufficient. Combining textile finishing technologies for specific applications and developing functional textiles that integrate multiple functions hold broad market prospects and practical value.

[0004] Textile materials are poor conductors of electricity, possessing a high specific resistivity. During production, processing, and use, fibers and their products generate static electricity due to friction, stretching, compression, peeling, electric field induction, and hot air drying. If these static charges cannot be rapidly dissipated through various pathways, they will gradually accumulate and build up on the materials and processing machinery. Due to the mechanical and discharge effects of static electricity, when the accumulation of static charge reaches a certain level, it can cause various obstacles and hazards. With the increasing production and application of synthetic fibers in textiles, the inherent high insulating and hydrophobic properties of these polymers make them susceptible to the generation and accumulation of static electricity. Therefore, the development of multifunctional fibers with antistatic properties is particularly necessary. Summary of the Invention

[0005] The purpose of the present invention is to provide a sixteen-hole multifunctional polyester staple fiber and a preparation method thereof, so as to solve the problems existing in the prior art.

[0006] In order to solve the above technical problems, the present invention provides the following technical solution: a method for preparing sixteen-hole multifunctional polyester staple fiber, comprising the following steps: (1) Terephthalic acid and ethylene glycol are first reacted at 200-220°C for 2-4 hours, and then activated zirconium carbide, chain extender, lubricant, and antimony trioxide are added, the temperature is raised to 260-280°C, and the reaction is carried out for 30 minutes under a vacuum degree of 60-130 Pa to obtain modified polyethylene terephthalate; (2) Pretreated zirconium carbide, 1.8 wt% hydrochloric acid solution, and aniline were mixed, cooled to 0-3 °C, subjected to 22 kHz ultrasound for 30 min, and then stirred at 100 rpm for 1-3 h. Under nitrogen protection at a flow rate of 50 sccm, an initiator was added to react for 6-12 h. Finally, the product was separated by centrifugation at a speed of 5000 rpm for 5 min, and then washed with deionized water and ethanol three times in sequence to obtain polyaniline composite zirconium carbide; (3) Mix polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution and its additives, stir at 500 rpm for 2 h, and then filter with 200-300 mesh filter cloth to remove undissolved particles. Finally, let it stand for 12-24 h to degas, and obtain a sodium alginate cortex solution. (4) The modified polyethylene terephthalate was melt-spun using a sixteen-hole spinneret, and glutaraldehyde vapor was introduced at the same time. The sodium alginate cortical solution was sprayed on the spun fibers, and the wet film thickness was 0.5~1.2μm. The fibers were then cooled by ring blowing at a temperature of 25~40℃ and a wind speed of 2~4m / s. Finally, the fibers were washed three times with deionized water at 40℃ and dried at 70℃ for 5h to obtain sixteen-hole multifunctional polyester staple fibers.

[0007] Furthermore, in step (1), the mass ratio of terephthalic acid, ethylene glycol, activated zirconium carbide, chain extender, lubricant, and antimony trioxide is 50:70:1:0.9:1:0.01.

[0008] Furthermore, the chain extender in step (1) is at least one of pyromellitic dianhydride, PEG-2000, TGDDM, and HDI.

[0009] Furthermore, the lubricant in step (1) is at least one of polydimethylsiloxane, polyethylene wax, pentaerythritol stearate, and oxidized polyethylene wax.

[0010] Furthermore, in step (2), the mass ratio of the pretreated zirconium carbide, 1.8 wt% hydrochloric acid solution, aniline, and initiator is 2-3:50-100:8:0.5-1.2.

[0011] Furthermore, in step (3), the mass ratio of the polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution, and the additive is 0.5-5:100:2.

[0012] Furthermore, the additive in step (3) is composed of barium chloride, calcium chloride, glycerol, and cetyltrimethylammonium bromide, and the mass ratio thereof is 0.2:0.2:3:2.

[0013] Furthermore, the melt spinning temperature in step (4) is 260-280° C. and the spinning speed is 550-900 m / min.

[0014] Furthermore, the diameter of a single hole of the sixteen-hole spinneret in step (4) is 0.1 mm.

[0015] Furthermore, the flow rate of the glutaraldehyde vapor introduced in step (4) is 50 mL / min.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The polyester staple fiber of the invention comprises sodium alginate as a sheath layer and polyethylene terephthalate as a core layer, so as to achieve the effects of far infrared, antistatic and high mechanical properties.

[0017] First, sodium alginate is used as the skin layer and polyethylene terephthalate is used as the core layer, and functional stratification is achieved through skin-core composite. Glutaraldehyde is used to react with the hydroxyl groups of polyethylene terephthalate and the amino groups of sodium alginate to form a covalent cross-linked network, thereby enhancing the interfacial bonding performance between the two and improving the mechanical properties of the fiber. Among them, the polyethylene terephthalate core layer solution introduces flexible chain segments into the matrix through a chain extender to reduce the melting point of polyethylene terephthalate, thereby reducing the risk of thermal decomposition of sodium alginate caused by spinning temperature. At the same time, a low-polarity lubricant is used to graft on part of the zirconium carbide surface, retaining the strong bonding between the unmodified area and the polyethylene terephthalate matrix, thereby balancing lubrication and enhanced function. This process is completed simultaneously during the melt processing of polyethylene terephthalate, thereby reducing interfacial thermal stress damage and achieving far-infrared and antistatic properties.

[0018] Secondly, polyaniline is used to compositely modify zirconium carbide, and the initiator triggers the polymerization of aniline monomer on the surface of zirconium carbide, thereby enhancing the antistatic property of the fiber. Then, the carboxyl and hydroxyl groups in sodium alginate promote the uniform dispersion of particles, and in the presence of divalent cations, participate in the interchain ion binding between the guluronic acid blocks in the polymer chain, cross-linking to form an "egg-box" structure, and cooperate with nanomaterials to limit the movement of molecular chains, thereby enhancing thermal stability. Among them, seaweed-carbon can generate far-infrared radiation and negative ions, and then through the sodium alginate network, the conjugated structure of polyaniline forms a conductive path, and the reflection loss of far-infrared electromagnetic waves is enhanced through carrier transition, thereby enhancing the far-infrared performance of the fiber. In turn, zirconium carbide can act as an electron acceptor to enhance carrier mobility and enhance the antistatic property of the fiber. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In order to more clearly illustrate the method provided by the present invention, the following examples are provided in detail. The test methods for various indicators of the 16-hole multifunctional polyester staple fiber prepared in the following examples are as follows: Mechanical properties: The fiber breaking strength of the embodiment and the comparative example of the same size was measured using an LLY-06E electronic single fiber strength tester according to GB / T14337.

[0021] Far infrared performance: The far infrared performance indicators of the embodiment and the comparative example of the same size were tested according to GB / T30127.

[0022] Antistatic property: The resistivity of the embodiment and the comparative example of the same size was tested using a dual-probe universal resistance tester.

[0023] Example 1; (1) Nano zirconium carbide and 10wt% hydrochloric acid solution were mixed in a mass ratio of 1:5, stirred at 300rpm for 3h, filtered and washed with water until neutral, and dried at 80℃ for 8h to obtain activated zirconium carbide; terephthalic acid and ethylene glycol were reacted at 200℃ for 2h, and then activated zirconium carbide, pyromellitic dianhydride, lubricant, and antimony trioxide were added, the temperature was raised to 260℃, and the reaction was carried out under a vacuum degree of 60Pa for 30min to obtain modified polyethylene terephthalate; the mass ratio of terephthalic acid, ethylene glycol, activated zirconium carbide, pyromellitic dianhydride, pentaerythritol stearate, and antimony trioxide was 50:70:1:0.9:1:0.01; (2) Nano zirconium carbide and 35wt% hydrochloric acid solution were mixed in a mass ratio of 1:5, stirred at 300rpm for 10h, filtered and washed with water until neutral, dried at 80℃ for 8h, and then mixed in 0.5wt% KH550-ethanol solution in a bath ratio of 1:50, ultrasonicated at 22kHz for 2h, and dried at 80℃ for 8h to obtain pretreated zirconium carbide; pretreated zirconium carbide, 1.8wt% hydrochloric acid solution and aniline were mixed, cooled to 0℃, and ultrasonicated at 22kHz for 30min. The mixture was then stirred at 100 rpm for 1 hour. Under nitrogen protection at a flow rate of 50 sccm, an initiator was added to react for 6 hours. The product was finally separated by centrifugation at a speed of 5000 rpm for 5 minutes. The mixture was then washed three times with deionized water and ethanol in sequence to obtain polyaniline composite zirconium carbide. The mass ratio of the pretreated zirconium carbide, 1.8 wt% hydrochloric acid solution, aniline, and initiator was 2:50:8:0.5. The initiator was ammonium persulfate. (3) Mixing polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution and additives, stirring at 500 rpm for 2 h, and then filtering with a 200-mesh filter cloth to remove undissolved particles, and finally standing and degassing for 12 h to obtain a sodium alginate cortex solution; the mass ratio of the polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution and additives is 0.5:100:2; the additives are composed of barium chloride, calcium chloride, glycerol and hexadecyltrimethylammonium bromide, and the mass ratio is 0.2:0.2:3:2; (4) The modified polyethylene terephthalate was melt-spun using a sixteen-hole spinneret with a single hole diameter of 0.1 mm. The spinning temperature was 260°C and the spinning speed was 550 m / min. Glutaraldehyde vapor was introduced at the same time with a flow rate of 50 mL / min. The sodium alginate cortical solution was sprayed on the spun fiber with a wet film thickness of 0.5 μm. The fiber was then cooled by ring blowing at a temperature of 25°C and a wind speed of 2 m / s. Finally, the fiber was washed three times with deionized water at 40°C and dried at 70°C for 5 h to obtain sixteen-hole multifunctional polyester staple fiber.

[0024] Example 2; (1) Nano zirconium carbide and 10wt% hydrochloric acid solution were mixed in a mass ratio of 1:5, stirred at 300rpm for 3h, filtered and washed with water until neutral, and dried at 80℃ for 8h to obtain activated zirconium carbide; terephthalic acid and ethylene glycol were reacted at 210℃ for 3h, and then activated zirconium carbide, pyromellitic dianhydride, lubricant, and antimony trioxide were added, the temperature was raised to 270℃, and the reaction was carried out under a vacuum degree of 90Pa for 30min to obtain modified polyethylene terephthalate; the mass ratio of terephthalic acid, ethylene glycol, activated zirconium carbide, pyromellitic dianhydride, pentaerythritol stearate, and antimony trioxide was 50:70:1:0.9:1:0.01; (2) Nano zirconium carbide and 35wt% hydrochloric acid solution were mixed in a mass ratio of 1:5, stirred at 300rpm for 10h, filtered and washed with water until neutral, dried at 80℃ for 8h, and then mixed in 0.5wt% KH550-ethanol solution in a bath ratio of 1:50, ultrasonicated at 22kHz for 2h, and dried at 80℃ for 8h to obtain pretreated zirconium carbide; pretreated zirconium carbide, 1.8wt% hydrochloric acid solution and aniline were mixed, cooled to 1℃, and ultrasonicated at 22kHz for 30min. The mixture was then stirred at 100 rpm for 2 h. Under nitrogen protection at a flow rate of 50 sccm, an initiator was added to react for 9 h. The product was finally separated by centrifugation at a speed of 5000 rpm for 5 min. The mixture was then washed three times with deionized water and ethanol to obtain polyaniline composite zirconium carbide. The mass ratio of the pretreated zirconium carbide, 1.8 wt% hydrochloric acid solution, aniline, and initiator was 2.5:80:8:1. The initiator was ammonium persulfate. (3) Mixing polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution and additives, stirring at 500 rpm for 2 h, and then filtering with a 250-mesh filter cloth to remove undissolved particles, and finally standing and degassing for 18 h to obtain a sodium alginate cortex solution; the mass ratio of the polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution and additives is 2:100:2; the additives are composed of barium chloride, calcium chloride, glycerol and hexadecyltrimethylammonium bromide, and the mass ratio is 0.2:0.2:3:2; (4) The modified polyethylene terephthalate was melt-spun using a sixteen-hole spinneret with a single hole diameter of 0.1 mm. The spinning temperature was 270°C and the spinning speed was 700 m / min. Glutaraldehyde vapor was introduced at the same time with a flow rate of 50 mL / min. The sodium alginate cortical solution was sprayed on the spun fiber with a wet film thickness of 0.8 μm. The fiber was then cooled by ring blowing at a temperature of 30°C and a wind speed of 3 m / s. Finally, the fiber was washed three times with deionized water at 40°C and dried at 70°C for 5 h to obtain sixteen-hole multifunctional polyester staple fiber.

[0025] Example 3; (1) Nano zirconium carbide and 10wt% hydrochloric acid solution were mixed in a mass ratio of 1:5, stirred at 300rpm for 3h, filtered and washed with water until neutral, and dried at 80℃ for 8h to obtain activated zirconium carbide; terephthalic acid and ethylene glycol were reacted at 220℃ for 4h, and then activated zirconium carbide, pyromellitic dianhydride, lubricant, and antimony trioxide were added, the temperature was raised to 280℃, and the reaction was carried out under vacuum of 130Pa for 30min to obtain modified polyethylene terephthalate; the mass ratio of terephthalic acid, ethylene glycol, activated zirconium carbide, pyromellitic dianhydride, pentaerythritol stearate, and antimony trioxide was 50:70:1:0.9:1:0.01; (2) Nano zirconium carbide and 35wt% hydrochloric acid solution were mixed in a mass ratio of 1:5, stirred at 300rpm for 10h, filtered and washed with water until neutral, dried at 80℃ for 8h, and then mixed in 0.5wt% KH550-ethanol solution in a bath ratio of 1:50, ultrasonicated at 22kHz for 2h, and dried at 80℃ for 8h to obtain pretreated zirconium carbide; pretreated zirconium carbide, 1.8wt% hydrochloric acid solution and aniline were mixed, cooled to 3℃, and ultrasonicated at 22kHz for 30min. The mixture was stirred at 100 rpm for 3 h, and an initiator was added to react under nitrogen protection at a flow rate of 50 sccm for 12 h. The product was finally separated by centrifugation at a speed of 5000 rpm for 5 min, and then washed with deionized water and ethanol three times to obtain polyaniline composite zirconium carbide; the mass ratio of the pretreated zirconium carbide, 1.8 wt% hydrochloric acid solution, aniline, and initiator was 3:100:8:1.2; the initiator was ammonium persulfate; (3) Mixing polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution and additives, stirring at 500 rpm for 2 h, and then filtering with a 300-mesh filter cloth to remove undissolved particles, and finally standing and degassing for 24 h to obtain a sodium alginate cortex solution; the mass ratio of the polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution and additives is 5:100:2; the additives are composed of barium chloride, calcium chloride, glycerol and hexadecyltrimethylammonium bromide, and the mass ratio is 0.2:0.2:3:2; (4) The modified polyethylene terephthalate was melt-spun using a sixteen-hole spinneret with a single hole diameter of 0.1 mm. The spinning temperature was 280°C and the spinning speed was 900 m / min. Glutaraldehyde vapor was introduced at a flow rate of 50 mL / min. The sodium alginate cortical solution was sprayed on the spun fiber with a wet film thickness of 1.2 μm. The fiber was then cooled by ring blowing at a temperature of 40°C and a wind speed of 4 m / s. Finally, the fiber was washed three times with deionized water at 40°C and dried at 70°C for 5 h to obtain sixteen-hole multifunctional polyester staple fiber.

[0026] Comparative Example 1; The difference between Comparative Example 1 and Example 2 is that step (1) is different. Step (1) is changed to: terephthalic acid and ethylene glycol are first reacted at 210°C for 3h, and then pyromellitic dianhydride, lubricant, and antimony trioxide are added, the temperature is raised to 270°C, and the reaction is carried out for 30min under a vacuum degree of 90Pa to obtain modified polyethylene terephthalate; the mass ratio of terephthalic acid, ethylene glycol, pyromellitic dianhydride, pentaerythritol stearate, and antimony trioxide is 50:70:0.9:1:0.01; the remaining steps are the same as in Example 2.

[0027] Comparative Example 2; The difference between Comparative Example 2 and Example 2 is that step (2) and step (3) are different. Step (2) is changed to: nano zirconium carbide and 35wt% hydrochloric acid solution are mixed in a mass ratio of 1:5, stirred at 300rpm for 10h, filtered and washed with water until neutral, dried at 80℃ for 8h, and then mixed in 0.5wt% KH550-ethanol solution in a bath ratio of 1:50, ultrasonicated at 22kHz for 2h, and dried at 80℃ for 8h to obtain pretreated zirconium carbide; Step (3) is changed to: pretreated zirconium carbide, 4wt% sodium alginate aqueous solution and additives are mixed, stirred at 500rpm for 2h, and then filtered with a 250-mesh filter cloth to remove undissolved particles, and finally allowed to stand for degassing for 18h to obtain a sodium alginate cortex solution; the mass ratio of the pretreated zirconium carbide, 4wt% sodium alginate aqueous solution and additives is 2:100:2; the additives are composed of barium chloride, calcium chloride, glycerol and hexadecyltrimethylammonium bromide in a mass ratio of 0.2:0.2:3:2; the remaining steps are the same as in Example 2.

[0028] Comparative Example 3: The difference between Comparative Example 3 and Example 2 is that step (2) is omitted, and step (3) is changed to: 4 wt% sodium alginate aqueous solution and its additives are mixed, stirred at 500 rpm for 2 h, and then filtered with a 250-mesh filter cloth to remove undissolved particles, and finally allowed to stand for degassing for 18 h to obtain a sodium alginate cortex solution; the mass ratio of the 4 wt% sodium alginate aqueous solution and the additives is 100:2; the additives are composed of barium chloride, calcium chloride, glycerol, and hexadecyltrimethylammonium bromide, and the mass ratio is 0.2:0.2:3:2; the remaining steps are the same as in Example 2.

[0029] Comparative Example 4; The difference between Comparative Example 4 and Example 2 is that step (4) is different. Step (4) is changed to: the modified polyethylene terephthalate is melt-spun using a sixteen-hole spinneret with a single hole diameter of 0.1 mm, the spinning temperature is 270°C, and the spinning speed is 700 m / min, the sodium alginate cortex solution is sprayed on the spun fiber, and the wet film thickness is 0.8 μm, and then the fiber is cooled by ring blowing at a temperature of 30°C and a wind speed of 3 m / s. Finally, it is washed three times with deionized water at 40°C and dried at 70°C for 5 h to obtain sixteen-hole multifunctional polyester staple fiber; the remaining steps are the same as Example 2.

[0030] Effect Examples Table 1 below shows the performance analysis results of the sixteen-hole multifunctional polyester staple fibers of Examples 1 to 3 of the present invention and Comparative Examples 1 to 4.

[0031] Table 1

[0032] From the comparison of the experimental data of the embodiment and the comparative example in Table 1, it can be found that the present invention uses sodium alginate as the cortex and polyethylene terephthalate as the core layer, and uses glutaraldehyde to react with the hydroxyl groups of polyethylene terephthalate and the amino groups of sodium alginate to form a covalent cross-linked network, thereby improving the mechanical properties of the fiber; wherein the polyethylene terephthalate core layer solution is grafted on a part of the surface of the zirconium carbide using a low-polarity lubricant, retaining the strong bond between the unmodified area and the polyethylene terephthalate matrix, thereby balancing lubrication and reinforcement. function, and achieve far-infrared and antistatic properties, then use polyaniline to compositely modify zirconium carbide to enhance the antistatic property of the fiber, and then promote the uniform dispersion of particles through the carboxyl and hydroxyl groups in sodium alginate, where seaweed-carbon can generate far-infrared radiation and negative ions, and then through the sodium alginate network, the conjugated structure of polyaniline forms a conductive path, and the reflection loss of far-infrared electromagnetic waves is enhanced through carrier transition, thereby enhancing the far-infrared performance of the fiber. In turn, zirconium carbide can act as an electron acceptor to enhance carrier mobility and enhance the antistatic property of the fiber.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing sixteen-hole multifunctional polyester staple fiber, characterized in that: The following steps are involved: (1) Terephthalic acid and ethylene glycol are first reacted under normal pressure and high temperature conditions, and then activated zirconium carbide, chain extender, lubricant, and antimony trioxide are added, and the temperature is raised and the reaction is carried out under vacuum conditions to obtain modified polyethylene terephthalate; (2) Pretreated zirconium carbide, 1.8 wt% hydrochloric acid solution, and aniline were mixed, cooled to 0-3°C, ultrasonicated, stirred, and initiators were added under nitrogen protection to react. After post-treatment, polyaniline composite zirconium carbide was obtained. (3) Stirring polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution and its additives for 2 h, filtering and degassing to obtain a sodium alginate cortex solution; (4) The modified polyethylene terephthalate is melt-spun using a sixteen-hole spinneret, and glutaraldehyde vapor is introduced at the same time. The sodium alginate cortical solution is sprayed on the spun fibers, and then the fibers are cooled by ring blowing and washed and dried to obtain sixteen-hole multifunctional polyester staple fibers.

2. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: The mass ratio of terephthalic acid, ethylene glycol, activated zirconium carbide, chain extender, lubricant and antimony trioxide in step (1) is 50:70:1:0.9:1:0.

01.

3. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: The chain extender in step (1) is at least one of pyromellitic dianhydride, PEG-2000, TGDDM, and HDI.

4. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: The lubricant in step (1) is at least one of polydimethylsiloxane, polyethylene wax, pentaerythritol stearate, and oxidized polyethylene wax.

5. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: The mass ratio of the pretreated zirconium carbide, 1.8 wt% hydrochloric acid solution, aniline, and initiator in step (2) is 2-3:50-100:8:0.5-1.

2.

6. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: In step (3), the mass ratio of the polyaniline composite zirconium carbide, 4 wt% sodium alginate aqueous solution, and the additive is 0.5-5:100:

2.

7. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: The additives in step (3) are composed of barium chloride, calcium chloride, glycerol, and cetyltrimethylammonium bromide, and the mass ratio thereof is 0.2:0.2:3:

2.

8. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: The melt spinning temperature in step (4) is 260-280° C. and the speed is 550-900 m / min.

9. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: The diameter of a single hole of the sixteen-hole spinneret in step (4) is 0.1 mm.

10. The method for preparing sixteen-hole multifunctional polyester staple fiber according to claim 1, characterized in that: The flow rate of the glutaraldehyde vapor introduced in step (4) is 50 mL / min.

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