Superfine denier functional long cilium top and preparation method thereof

Abstract

The invention relates to a superfine denier functional long cilia top and a preparation method thereof, the superfine denier functional long cilia top comprises a long cilia top body and a functional coating, the functional coating is formed by coating the long cilia top body with a functional coating, the functional coating comprises the following components in parts by mass: 70-80 parts of waterborne polyurethane, 5-7 parts of an antibacterial component, 2-4 parts of a wetting agent, 1-3 parts of a defoaming agent and 1-3 parts of a flatting agent; the antibacterial component is prepared from the following raw materials: composite carbon nitride and shell powder. The long cilia strip has the effect of improving the antibacterial performance of the long cilia strip.

Description

Technical Field

[0001] This application relates to the field of ultrafine denier fibers, and in particular to an ultrafine denier functional long fiber sliver and its preparation method. Background Technology

[0002] With the increasing demand for high-performance fibers in the textile industry, ultrafine denier fibers have gradually become a research hotspot. Due to their excellent softness and breathability, ultrafine denier fibers have broad application prospects in clothing, home furnishings, and other fields. Although traditional fiber manufacturing technologies are mature, they are still insufficient when facing the high precision requirements of ultrafine denier fibers, resulting in unstable product quality and difficulty in meeting the growing market demand.

[0003] Currently, the most common methods for preparing ultrafine denier fibers include melt spinning and solution spinning. Neither melt spinning nor solution spinning can fully balance high efficiency and environmental friendliness. Furthermore, both methods generally suffer from poor stability and low yield, failing to fully meet market demands.

[0004] Technical issues related to improving the stability and finished product quality during the production process of ultra-fine denier long fiber tops. Summary of the Invention

[0005] To further improve the stability of ultrafine denier fibers, this application provides an ultrafine denier functional long fiber sliver and its preparation method.

[0006] Firstly, this application provides an ultra-fine denier functional long fiber top, which adopts the following technical solution: An ultra-fine denier functional long fiber sliver includes a long fiber sliver body and a functional coating. The functional coating is formed by applying a functional coating material to the long fiber sliver body. The functional coating material comprises the following components in parts by weight: The composition includes 70-80 parts of waterborne polyurethane, 5-7 parts of antibacterial component, 2-4 parts of wetting agent, 1-3 parts of defoamer, and 1-3 parts of leveling agent; the antibacterial component raw materials include composite carbon nitride and shell powder.

[0007] By adopting the above technical solution, a functional coating is formed by coating the surface of the long fiber strip body with a functional coating. The functional coating contains an antibacterial component prepared by composite carbon nitride and shell powder. Carbon nitride is a layered photocatalytic substance similar to graphite, which can generate hydroxyl radicals and superoxide ions, which can effectively destroy bacteria and play an antibacterial role. Shell powder has good dispersibility, adsorption and biocompatibility, and also has good antibacterial properties. It can be used as a carrier for composite carbon nitride to play a synergistic antibacterial role and further improve the overall antibacterial performance of the system.

[0008] Preferably, the composite carbon nitride comprises modified titanium dioxide and carbon nitride, wherein the modified titanium dioxide raw material comprises titanium dioxide, KH560 and polyhexamethylene biguanide hydrochloride.

[0009] By adopting the above technical solution, the surface roughness of the system can be improved by combining modified titanium dioxide with carbon nitride, thereby enhancing the hydrophobic properties of the system. At the same time, the bonding performance with the long fiber strand body can be further improved. The modified titanium dioxide is prepared by titanium dioxide, KH560 and polyhexamethylene biguanide hydrochloride. KH560 is used as a bridge to graft polyhexamethylene biguanide hydrochloride onto the surface of titanium dioxide. Hexamethylene biguanide hydrochloride is a cationic reagent with antibacterial properties. After grafting with titanium dioxide, it can effectively improve the stability of bulk polyhexamethylene biguanide hydrochloride, thereby achieving a synergistic antibacterial effect with titanium dioxide.

[0010] Preferably, the modified titanium dioxide is prepared by the following method: Nano-titanium dioxide, ethanol, and water were mixed and ultrasonically dispersed to obtain a titanium dioxide dispersion. KH560, ethanol, and water were mixed and ultrasonically dispersed, then mixed with the titanium dioxide dispersion. After heating and reacting, the mixture was centrifuged, washed, and dried to obtain silane composite titanium dioxide. The silane composite titanium dioxide was dispersed in water to obtain a silane composite titanium dioxide dispersion. Polyhexamethylene biguanide hydrochloride was dispersed in water, and the silane composite titanium dioxide dispersion and tetramethylethylenediamine were added. After heating and reacting, the mixture was centrifuged, washed, and dried to obtain modified titanium dioxide.

[0011] By adopting the above technical solution, KH560 is used to modify the surface of titanium dioxide, and then the terminal amino group of polyhexamethylene biguanide hydrochloride is reacted with the epoxy group to obtain modified titanium dioxide grafted with polyhexamethylene biguanide hydrochloride. It has good stability and at the same time, it synergistically improves the overall antibacterial performance of the system.

[0012] Preferably, the mass ratio of the nano-titanium dioxide, KH560 and polyhexamethylene biguanide hydrochloride is 1:(1.1-1.3):1.25.

[0013] By adopting the above technical solution, and optimizing the mass ratio between nano-titanium dioxide, KH560 and polyhexamethylene biguanide hydrochloride within the above range, the overall stability of the prepared modified titanium dioxide can be further improved.

[0014] Preferably, the composite carbon nitride is prepared by the following method: Melamine was calcined to obtain carbon nitride. The carbon nitride was mixed with anhydrous ethanol and ultrasonically dispersed to obtain a carbon nitride dispersion. Modified titanium dioxide was dispersed in anhydrous ethanol and then added to the carbon nitride dispersion. The mixture was ultrasonicated until the anhydrous ethanol was completely evaporated and dried to obtain composite carbon nitride.

[0015] By adopting the above technical solution, the surface roughness of carbon nitride can be effectively improved after being combined with modified titanium dioxide. Furthermore, the combined carbon nitride has low surface energy, which can effectively improve the overall hydrophobicity of the long fiber sliver. At the same time, the bonding performance with functional coatings is further improved, enhancing the adhesion stability of the functional coating on the long fiber sliver body. The thermal stability of the long fiber sliver is also further improved.

[0016] Preferably, the mass ratio of the modified titanium dioxide to titanium nitride is 1:(0.13-0.15).

[0017] By adopting the above technical solution, and preferably within the above-mentioned range the mass ratio between modified titanium dioxide and carbon nitride, the stability of the prepared composite carbon nitride can be further improved.

[0018] Preferably, the antibacterial component is prepared by the following method: The shell powder is calcined to obtain calcined shell powder. The calcined shell powder is mixed with isopropanol and ultrasonicated to obtain a shell powder dispersion. The composite carbon nitride is mixed with isopropanol and ultrasonicated, and then added to the shell powder dispersion to obtain a mixture. The mixture is ultrasonicated, magnetically stirred, filtered, washed, and dried to obtain the antibacterial component.

[0019] By adopting the above technical solution, the calcined shell powder has good antibacterial properties and the specific surface area is improved, which can further enhance the loading effect of shell powder on the overall composite carbon nitride. At the same time, it can improve the adsorption performance of the system on bacteria, and achieve a good synergistic antibacterial effect.

[0020] Preferably, the mass ratio of the composite carbon nitride to the calcined seashell powder is 1:(1.7-1.9).

[0021] By adopting the above technical solution, and preferably within the above range the mass ratio between composite carbon nitride and calcined seashell powder, the overall stability of the prepared antibacterial component can be effectively improved.

[0022] Preferably, the calcination temperature of the shell powder is 1100-1300℃.

[0023] By adopting the above technical solution, the calcination temperature of the shell powder is preferably within the above range, which further improves the stability of the prepared antibacterial component, thereby enhancing the overall performance of the composite carbon nitride.

[0024] Secondly, this application provides a method for preparing ultrafine denier functional long fiber slivers, employing the following technical solution: A method for preparing ultrafine denier functional long fiber tops includes the following steps: The long fiber sliver is completely immersed in the functional coating and left to stand so that the functional coating is completely adhered to the surface of the long fiber sliver. Then the long fiber sliver is taken out and dried so that a functional coating is formed on the surface of the long fiber sliver, resulting in an ultra-fine denier functional long fiber sliver.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. After applying the functional coating to the surface of the long fiber sliver body, a functional coating is formed on the surface of the long fiber sliver body. The functional coating contains an antibacterial component prepared by composite carbon nitride and shell powder. Among them, carbon nitride is a graphite-like layered photocatalytic material that can generate hydroxyl radicals and superoxide ions, thus exhibiting good antibacterial properties. Shell powder has good dispersibility, adsorption and biocompatibility, and also has good antibacterial properties, which can work synergistically with composite carbon nitride to inhibit bacteria. 2. Using KH560 as a bridge, the terminal amino group of polyhexamethylene biguanide hydrochloride undergoes a ring-opening reaction with the epoxy group, grafting polyhexamethylene biguanide hydrochloride onto the surface of titanium dioxide. This not only gives titanium dioxide good dispersibility but also allows it to synergistically inhibit bacteria with polyhexamethylene biguanide hydrochloride, and improves the stability of polyhexamethylene biguanide hydrochloride in the system. 3. The composite carbon nitride obtained by combining modified titanium dioxide with carbon nitride can improve the roughness of the system, thereby enhancing the overall hydrophobicity of the long fiber strands and improving the bonding performance between the long fiber strands and the functional coatings, further enhancing the overall stability of the system. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the embodiments: Raw material description: All raw materials in the examples are commercially available; the wetting agent is nonylphenol polyoxyethylene ether (CAS No.: 9016-45-9), the defoamer is polydimethylsiloxane (CAS No.: 9016-00-6), and the leveling agent is ethyl perfluorooctanoate (CAS No.: 3108-24-5).

[0027] Example 1 Preparation of modified titanium dioxide: 20g of nano-titanium dioxide, 180g of ethanol, and 20g of deionized water were mixed and ultrasonically dispersed to obtain a titanium dioxide dispersion. 22g of KH560 (CAS No.: 2530-85-0), 180g of ethanol, and 20g of deionized water were mixed and ultrasonically dispersed to obtain a KH560 dispersion. The KH560 dispersion and the titanium dioxide dispersion were mixed, heated to 60℃, and reacted for 8 hours. After centrifugation, the mixture was washed alternately with deionized water and ethanol, and dried in a vacuum drying oven at 70℃ for 10 hours to obtain... Silane-composite titanium dioxide was prepared by dispersing silane-composite titanium dioxide in 200g of deionized water to obtain a silane-composite titanium dioxide dispersion. 25g of polyhexamethylene biguanide hydrochloride (CAS No.: 32289-58-0) was dispersed in 100g of deionized water, and then the silane-composite titanium dioxide dispersion was added. 0.3g of tetramethylethylenediamine (CAS No.: 110-18-9) was then added. The mixture was heated to 50℃ and reacted for 6 hours. After centrifugation, the mixture was washed with deionized water and dried to obtain modified titanium dioxide.

[0028] Preparation of composite carbon nitride: Melamine (CAS No.: 108-78-1) was calcined in a muffle furnace at 500℃ for 4 hours, and then calcined again in the muffle furnace at 500℃ for 2 hours to obtain carbon nitride. 2.21g of carbon nitride was mixed with 200g of anhydrous ethanol and ultrasonically dispersed for 2 hours to obtain a carbon nitride dispersion. 17.69g of modified titanium dioxide was dispersed in 500g of anhydrous ethanol and then added to the carbon nitride dispersion. The mixture was ultrasonicated until the anhydrous ethanol was completely evaporated and dried at 120℃ for 2 hours to obtain composite carbon nitride.

[0029] Preparation of antibacterial components: Shell powder was calcined at 1100℃ for 2 hours to obtain calcined shell powder. 18.89g of calcined shell powder was mixed with 300g of isopropanol and sonicated to obtain a shell powder dispersion. 11.11g of composite carbon nitride was mixed with 200g of isopropanol and sonicated, then added to the shell powder dispersion to obtain a mixture. The mixture was sonicated for 60min and then magnetically stirred for 3h. After filtration, it was washed alternately with anhydrous ethanol and deionized water and vacuum dried at 80℃ for 12h to obtain the antibacterial component.

[0030] Preparation of functional coatings: Mix 200g of waterborne polyurethane, 18g of antibacterial component, 5g of wetting agent, 2g of defoamer, and 1g of leveling agent, and stir at 150rpm for 4 hours to obtain a functional coating.

[0031] Preparation of ultrafine denier functional long fiber slivers: The long fiber sliver is completely immersed in the functional coating, heated to 40°C, and left to stand for 4 hours to allow the functional coating to fully adhere to the surface of the long fiber sliver. Then, the long fiber sliver is taken out and dried at a constant temperature of 50°C for 8 hours, forming a functional coating on the surface of the long fiber sliver, thus obtaining an ultra-fine denier functional long fiber sliver.

[0032] Example 2 Preparation of modified titanium dioxide: 20g of nano-titanium dioxide, 180g of ethanol, and 20g of deionized water were mixed and ultrasonically dispersed to obtain a titanium dioxide dispersion. 26g of KH560, 180g of ethanol, and 20g of deionized water were mixed and ultrasonically dispersed to obtain a KH560 dispersion. The KH560 dispersion and the titanium dioxide dispersion were mixed, heated to 60℃, and reacted for 8 hours. After centrifugation, the mixture was washed alternately with deionized water and ethanol, and dried in a vacuum drying oven at 70℃ for 10 hours to obtain silane composite titanium dioxide. The silane composite titanium dioxide was dispersed in 200g of deionized water to obtain a silane composite titanium dioxide dispersion. 25g of polyhexamethylene biguanide hydrochloride was dispersed in 100g of deionized water, and then the silane composite titanium dioxide dispersion was added. 0.3g of tetramethylethylenediamine was added, and the mixture was heated to 50℃ and reacted for 6 hours. After centrifugation, the mixture was washed with deionized water and dried to obtain modified titanium dioxide.

[0033] Preparation of composite carbon nitride: Melamine was calcined in a muffle furnace at 500°C for 4 hours, and then calcined again in the muffle furnace at 500°C for 2 hours to obtain carbon nitride. 2.61 g of carbon nitride was mixed with 200 g of anhydrous ethanol and ultrasonically dispersed for 2 hours to obtain a carbon nitride dispersion. 17.39 g of modified titanium dioxide was dispersed in 500 g of anhydrous ethanol and then added to the carbon nitride dispersion. The mixture was ultrasonicated until the anhydrous ethanol was completely evaporated and dried at 120°C for 2 hours to obtain composite carbon nitride.

[0034] Preparation of antibacterial components: Shell powder was calcined at 1300℃ for 2 hours to obtain calcined shell powder. 19.66g of calcined shell powder was mixed with 300g of isopropanol and sonicated to obtain a shell powder dispersion. 10.34g of composite carbon nitride was mixed with 200g of isopropanol and sonicated, then added to the shell powder dispersion to obtain a mixture. The mixture was sonicated for 60min and then magnetically stirred for 3h. After filtration, it was washed alternately with anhydrous ethanol and deionized water and vacuum dried at 80℃ for 12h to obtain the antibacterial component.

[0035] Preparation of functional coatings: 240g of waterborne polyurethane, 20g of antibacterial component, 7g of wetting agent, 4g of defoamer and 3g of leveling agent were mixed and stirred at 150rpm for 4h to obtain functional coating.

[0036] Preparation of ultrafine denier functional long fiber slivers: The long fiber sliver is completely immersed in the functional coating, heated to 40°C, and left to stand for 4 hours to allow the functional coating to fully adhere to the surface of the long fiber sliver. Then, the long fiber sliver is taken out and dried at a constant temperature of 50°C for 8 hours, forming a functional coating on the surface of the long fiber sliver, thus obtaining an ultra-fine denier functional long fiber sliver.

[0037] Example 3 Preparation of modified titanium dioxide: 20g of nano-titanium dioxide, 180g of ethanol, and 20g of deionized water were mixed and ultrasonically dispersed to obtain a titanium dioxide dispersion. 24g of KH560, 180g of ethanol, and 20g of deionized water were mixed and ultrasonically dispersed to obtain a KH560 dispersion. The KH560 dispersion and the titanium dioxide dispersion were mixed, heated to 60℃, and reacted for 8 hours. After centrifugation, the mixture was washed alternately with deionized water and ethanol, and dried in a vacuum drying oven at 70℃ for 10 hours to obtain silane composite titanium dioxide. The silane composite titanium dioxide was dispersed in 200g of deionized water to obtain a silane composite titanium dioxide dispersion. 25g of polyhexamethylene biguanide hydrochloride was dispersed in 100g of deionized water, and then the silane composite titanium dioxide dispersion was added. 0.3g of tetramethylethylenediamine was added, and the mixture was heated to 50℃ and reacted for 6 hours. After centrifugation, the mixture was washed with deionized water and dried to obtain modified titanium dioxide.

[0038] Preparation of composite carbon nitride: Melamine was calcined in a muffle furnace at 500°C for 4 hours, and then calcined again in the muffle furnace at 500°C for 2 hours to obtain carbon nitride. 2.46 g of carbon nitride was mixed with 200 g of anhydrous ethanol and ultrasonically dispersed for 2 hours to obtain a carbon nitride dispersion. 17.54 g of modified titanium dioxide was dispersed in 500 g of anhydrous ethanol and then added to the carbon nitride dispersion. The mixture was ultrasonicated until the anhydrous ethanol was completely evaporated and dried at 120°C for 2 hours to obtain composite carbon nitride.

[0039] Preparation of antibacterial components: Shell powder was calcined at 1200℃ for 2 hours to obtain calcined shell powder. 19.29g of calcined shell powder was mixed with 300g of isopropanol and sonicated to obtain a shell powder dispersion. 10.71g of composite carbon nitride was mixed with 200g of isopropanol and sonicated, then added to the shell powder dispersion to obtain a mixture. The mixture was sonicated for 60min and then magnetically stirred for 3h. After filtration, it was washed alternately with anhydrous ethanol and deionized water and vacuum dried at 80℃ for 12h to obtain the antibacterial component.

[0040] Preparation of functional coatings: 220g of waterborne polyurethane, 19g of antibacterial component, 6g of wetting agent, 3g of defoamer and 2g of leveling agent were mixed and stirred at 150rpm for 4h to obtain functional coating.

[0041] Preparation of ultrafine denier functional long fiber slivers: The long fiber sliver is completely immersed in the functional coating, heated to 40°C, and left to stand for 4 hours to allow the functional coating to fully adhere to the surface of the long fiber sliver. Then, the long fiber sliver is taken out and dried at a constant temperature of 50°C for 8 hours, forming a functional coating on the surface of the long fiber sliver, thus obtaining an ultra-fine denier functional long fiber sliver.

[0042] Example 4 Example 4 is based on Example 3. In Example 4, 18g of KH560 was added during the preparation of modified titanium dioxide.

[0043] Example 5 Example 5 is based on Example 3. In Example 5, 30g of KH560 was added during the preparation of modified titanium dioxide.

[0044] Example 6 Example 6 is based on Example 3. In Example 6, when preparing composite carbon nitride, 18.02g of modified titanium dioxide and 1.98g of carbon nitride were used.

[0045] Example 7 Example 7 is based on Example 3. In Example 7, when preparing composite carbon nitride, 17.09g of modified titanium dioxide and 2.91g of carbon nitride were used.

[0046] Example 8 Example 8 is based on Example 3. In Example 8, when preparing the antibacterial component, 12g of modified carbon nitride and 18g of shell powder were used.

[0047] Example 9 Example 9 is based on Example 3. In Example 9, when preparing the antibacterial component, 9.68g of modified carbon nitride and 20.32g of shell powder were used.

[0048] Example 10 Example 10 is based on Example 3. In Example 10, the calcination temperature of the shell powder is 900°C when preparing the antibacterial component.

[0049] Example 11 Example 11 is based on Example 3. In Example 11, the calcination temperature of the shell powder is 1500°C when preparing the antibacterial component.

[0050] Example 12 Example 12 is based on Example 3. In Example 12, the shell powder was not calcined when preparing the antibacterial component.

[0051] Example 13 Example 13 is based on Example 3, but no polyhexamethylene biguanide hydrochloride was added during the preparation of the modified titanium dioxide in Example 13.

[0052] Example 14 Example 14 is based on Example 3. In Example 14, the modified titanium dioxide is prepared by physically mixing titanium dioxide and polyhexamethylene biguanide hydrochloride at a mass ratio of 1:1.25.

[0053] Comparative Example 1 Comparative Example 1 is based on Example 3, except that in the preparation of composite carbon nitride, the modified titanium dioxide was replaced with ordinary titanium dioxide.

[0054] Comparative Example 2 Comparative Example 2 is based on Example 3. In Comparative Example 2, modified carbon nitride was replaced with carbon nitride when preparing the antibacterial component.

[0055] Comparative Example 3 Comparative Example 3 is based on Example 3. In Comparative Example 3, the modified carbon nitride and shell powder were obtained by ordinary physical mixing when preparing the composite antibacterial component.

[0056] Performance testing Samples from Examples 1-14 and Comparative Examples 1-3 were taken and subjected to the following performance tests: (1) Antibacterial properties With reference to GB / T 20944.3-2008, samples were taken to test the antibacterial properties of the samples. Each sample was tested three times, and the average value was taken. The test results were recorded in Table 1.

[0057] (2) Fracture strength With reference to GB / T 27629-2011, the breaking strength of the specimens was tested. Each specimen was tested three times, the average value was taken, and the test results were recorded in Table 1.

[0058] Table 1. Performance test results of samples from Examples 1-14 and Comparative Examples 1-3 As shown in Table 1, the inhibition rates of Escherichia coli and Staphylococcus aureus in Examples 1-3 were all 98% or higher, indicating that the long fiber strands prepared in this application have good antibacterial properties. The tensile strength of Examples 1-3 was all 79.3 cN or higher, indicating that the long fiber strands prepared in this application have good tensile strength.

[0059] In Examples 4 and 5, the mass ratios of nano-titanium dioxide, KH560, and polyhexamethylene biguanide hydrochloride during the preparation of modified titanium dioxide were not within the range specified in this application. When the amount of KH560 added was too small, it was difficult to further modify the surface of the nano-titanium dioxide, making it difficult to improve the dispersion performance of the nano-titanium dioxide. At the same time, it was difficult to graft polyhexamethylene biguanide hydrochloride onto titanium dioxide with sufficient epoxy groups, affecting the overall synergistic antibacterial performance of the system. When the content of KH560 was too large, the overall stability of the system was affected, and agglomeration occurred between particles. Therefore, the performance of Examples 4 and 5 was reduced.

[0060] In Examples 6 and 7, the mass ratio of modified titanium dioxide to carbon nitride in the preparation of composite carbon nitride was not within the range specified in this application. When the carbon nitride content was too low, the photocatalytic efficiency of titanium dioxide was difficult to further improve, and the antibacterial performance of the system was difficult to further improve. When the carbon nitride content was too high, the photocatalytic performance of titanium dioxide was difficult to further improve. At the same time, the stability of excessive carbon nitride in the system was difficult to further improve, and it was also difficult to further stabilize and improve the roughness of the system, affecting the overall stability of the system. Therefore, the performance of Examples 6 and 7 decreased. Examples 8 and... In Example 9, the mass ratio between the composite carbon nitride and the shell powder used in preparing the antibacterial component was not within the range specified in this application. When the amount of shell powder used was too small, it was difficult to load a sufficient amount of composite carbon nitride, making it difficult to improve the adsorption performance of the system on bacteria and other organic matter, resulting in a decrease in the synergistic antibacterial effect and difficulty in further improving the stability. When the amount of shell powder used was too large, the content of composite carbon nitride was too small, making it difficult to further improve the synergistic antibacterial performance of the system and also making it difficult to further improve the overall roughness of the system, thus affecting the hydrophobic properties and stability of the system. Therefore, the performance of Examples 8 and 9 was reduced.

[0061] In Examples 10 and 11, the calcination temperature of the shell powder was outside the range specified in this application when preparing the antibacterial components. When the calcination temperature of the shell powder was too low, calcium carbonate remained in the shell powder, which reduced the stability of the shell powder when loaded with composite carbon nitride, thus affecting the overall performance of the system. When the calcination temperature of the shell powder was too high, large sintered bodies were formed, which affected the overall stability and loading performance of the system. At the same time, it was difficult to further improve the synergistic antibacterial effect of the system. Therefore, the performance of Examples 10 and 11 was reduced.

[0062] In Example 12, the shell powder was not calcined during the preparation of the antibacterial component, making it difficult to further release calcium ions. Furthermore, the adsorption and compatibility properties decreased, making it difficult to achieve a synergistic antibacterial effect. At the same time, the stability decreased. Therefore, the performance of Example 12 was reduced.

[0063] In Example 13, no polyhexamethylene biguanide hydrochloride was added during the preparation of modified titanium dioxide. Without the addition of polyhexamethylene biguanide hydrochloride, it is difficult to further improve the antibacterial properties of the system, and it is also difficult to further improve the overall dispersibility of the system, resulting in decreased stability. Therefore, the performance of Example 13 was reduced.

[0064] In Example 14, titanium dioxide and polyhexamethylene biguanide hydrochloride were added to the system by physical mixing only. The polyhexamethylene biguanide hydrochloride alone had poor stability in the system and was quickly lost, making it difficult to achieve good synergistic antibacterial performance. Furthermore, it was difficult to further improve the overall dispersibility of the system. Therefore, the performance of Example 14 was reduced.

[0065] In Comparative Example 1, the titanium dioxide was not modified. Unmodified titanium dioxide is difficult to disperse evenly in the system and cannot further exert a synergistic antibacterial effect. Therefore, the performance of Comparative Example 1 is reduced.

[0066] In Comparative Example 2, when preparing the antibacterial component, the composite carbon nitride was replaced with carbon nitride. The single carbon nitride component alone could not further improve the overall roughness of the system, nor could it further improve the bonding performance with the long fiber strand body. At the same time, the overall stability of the system could not be further improved, and the antibacterial performance could not be further improved. Therefore, the performance of Comparative Example 2 was reduced.

[0067] In Comparative Example 3, the composite antibacterial component was prepared by physically mixing composite carbon nitride with shell powder without loading the composite carbon nitride onto the shell powder. As a result, the dispersion of the composite carbon nitride in the system was difficult to improve further. At the same time, it was difficult to adsorb bacteria through the shell powder system, and it was difficult to achieve a synergistic antibacterial effect. Therefore, the performance of Comparative Example 3 was reduced.

[0068] This specific embodiment is merely an explanation of this application and is not intended to limit it. Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification but must be determined according to the scope of the claims.

Claims

1. A type of ultra-fine denier functional long fiber sliver, characterized in that: The product comprises a long fiber sliver body and a functional coating, wherein the functional coating is formed by applying a functional coating material to the long fiber sliver body, and the functional coating material comprises the following components in parts by weight: 70-80 parts waterborne polyurethane, 5-7 parts antibacterial component, 2-4 parts wetting agent, 1-3 parts defoamer, and 1-3 parts leveling agent; The antibacterial component raw materials include composite carbon nitride and shell powder.

2. The ultra-fine denier functional long fiber top according to claim 1, characterized in that: The composite carbon nitride comprises modified titanium dioxide and carbon nitride, wherein the modified titanium dioxide raw material comprises titanium dioxide, KH560 and polyhexamethylene biguanide hydrochloride.

3. The ultra-fine denier functional long fiber top according to claim 2, characterized in that: The modified titanium dioxide was prepared by the following method: Nano-titanium dioxide, ethanol, and water were mixed and ultrasonically dispersed to obtain a titanium dioxide dispersion. KH560, ethanol, and water were mixed and ultrasonically dispersed, then mixed with the titanium dioxide dispersion. After heating and reacting, the mixture was centrifuged, washed, and dried to obtain silane composite titanium dioxide. The silane composite titanium dioxide was dispersed in water to obtain a silane composite titanium dioxide dispersion. Polyhexamethylene biguanide hydrochloride was dispersed in water, and the silane composite titanium dioxide dispersion and tetramethylethylenediamine were added. After heating and reacting, the mixture was centrifuged, washed, and dried to obtain modified titanium dioxide.

4. The ultra-fine denier functional long fiber top according to claim 3, characterized in that: The mass ratio of the nano-titanium dioxide, KH560 and polyhexamethylene biguanide hydrochloride is 1:(1.1-1.3):1.

25.

5. The ultra-fine denier functional long fiber top according to claim 2, characterized in that: The composite carbon nitride was prepared by the following method: Melamine was calcined to obtain carbon nitride. The carbon nitride was mixed with anhydrous ethanol and ultrasonically dispersed to obtain a carbon nitride dispersion. Modified titanium dioxide was dispersed in anhydrous ethanol and then added to the carbon nitride dispersion. The mixture was ultrasonicated until the anhydrous ethanol was completely evaporated and dried to obtain composite carbon nitride.

6. The ultra-fine denier functional long fiber top according to claim 5, characterized in that: The mass ratio of the modified titanium dioxide to titanium nitride is 1:(0.13-0.15).

7. The ultra-fine denier functional long fiber top according to claim 1, characterized in that: The antibacterial component is then prepared using the following method: The shell powder is calcined to obtain calcined shell powder. The calcined shell powder is mixed with isopropanol and ultrasonicated to obtain a shell powder dispersion. The composite carbon nitride is mixed with isopropanol and ultrasonicated, and then added to the shell powder dispersion to obtain a mixture. The mixture is ultrasonicated, magnetically stirred, filtered, washed, and dried to obtain the antibacterial component.

8. The ultra-fine denier functional long fiber top according to claim 7, characterized in that: The mass ratio of the composite carbon nitride to the calcined seashell powder is 1:(1.7-1.9).

9. The ultra-fine denier functional long fiber top according to claim 7, characterized in that: The calcination temperature of the shell powder is 1100-1300℃.

10. A functional long fiber sliver applied to any one of claims 1-9, characterized in that: Including steps such as: The long fiber sliver is completely immersed in the functional coating and left to stand so that the functional coating is completely adhered to the surface of the long fiber sliver. Then the long fiber sliver is taken out and dried so that a functional coating is formed on the surface of the long fiber sliver, resulting in an ultra-fine denier functional long fiber sliver.

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