Uvioresistant fiber based on waste textile powder and preparation method and application thereof

Abstract

The application provides an ultraviolet-resistant fiber based on waste textile powder and a preparation method and application thereof. First, a preset proportion of polymer resin particles and unmodified silk powder are dissolved in a binary mixed solvent, vacuum defoaming is performed, and a silk powder / polymer spinning solution is obtained; then the silk powder / polymer spinning solution is placed in a wet spinning device, is sprayed out from a single-hole spinning hole with a predetermined shape, and the spinning stream enters a coagulation bath for a preset time, is drawn, and is dried to obtain the ultraviolet-resistant fiber. The application utilizes the synergistic effect of the binary solvent and the specific spinning hole shape, continuously adjusts the arrangement of the polymer and the silk powder in the spinning process, finally obtains a microporous structure fiber with a multiple-pore structure, and the obtained ultraviolet-resistant fiber has a high porosity, a uniform pore distribution, a rich multiple-micropore structure, a specific surface morphology and a synergistic effect of the silk powder, which can reflect and absorb ultraviolet rays, has an ultraviolet-resistant effect, and improves the moisture absorption performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of functional textile technology, and particularly relates to an anti-ultraviolet fiber based on waste textile powder and a preparation method and application thereof. BACKGROUND

[0002] With the continuous emission of carbon dioxide, the greenhouse effect gradually intensifies, and the ozone layer is greatly damaged, the ultraviolet rays reaching the earth's surface increase, and the rise of anti-ultraviolet products becomes a general trend.

[0003] Most of the currently marketed ultraviolet protection products use metal oxides as ultraviolet protection sources, and anti-ultraviolet textiles are prepared by blending spinning or setting a coating on the surface of the fabric. For example, a patent with the application number CN202210337071.5 discloses an anti-ultraviolet master batch for polyester fiber, a preparation method and anti-ultraviolet polyester fiber and fabric, the anti-ultraviolet master batch for polyester fiber includes polyester, dispersant, antioxidant, and anti-ultraviolet nano-oxide; the anti-ultraviolet nano-oxide includes titanium dioxide and cerium oxide, and the anti-ultraviolet polyester fiber is prepared by blending and melt spinning. This kind of preparation method usually needs to add a dispersant to promote the dispersion of metal oxide particles, but to some extent, the metal oxide particles are still prone to agglomeration, which affects the performance of the fiber. The anti-ultraviolet product obtained by directly coating on the surface of the fabric has weak adhesion between the coating and the fabric surface, so that the coating is easy to fall off. In addition, the production of metal oxides is complex and expensive, which is not conducive to sustainable development.

[0004] Furthermore, the stacking of waste products in the textile industry not only occupies space but also pollutes the environment. If these waste products can be utilized to prepare products with anti-ultraviolet performance, it has important practical value.

[0005] Therefore, it is necessary to design an improved anti-ultraviolet fiber based on waste textile powder and a preparation method and application thereof to solve the above problems. SUMMARY

[0006] The present application aims to provide an anti-ultraviolet fiber based on waste textile powder and a preparation method and application thereof. In the fiber preparation process, the high polymer resin particles and silk powder are uniformly mixed by using a binary solvent, and in the wet spinning process, a spinning device with a specific structure jet orifice is selected to obtain a specific shape of the spinning stream. Under the synergistic effect of the shape of the spinning stream and the binary solvent, the molecular chains of the high polymer are constantly rearranged, and the arrangement of the high polymer and the silk powder is constantly adjusted, so that a fiber with multiple pore structures is finally obtained. The obtained anti-ultraviolet fiber has high porosity and uniform pore distribution. The rich multiple pore microstructure, specific surface morphology, and synergistic effect of the silk powder can reflect and absorb ultraviolet rays, achieve anti-ultraviolet effect, and improve the moisture absorption.

[0007] To achieve the above-mentioned purposes, the application provides a preparation method of anti-ultraviolet fiber based on waste textile powder, comprising the following steps:

[0008] S1. A predetermined proportion of high polymer resin particles, unmodified silk powder and binary mixed solvent are mechanically blended, vacuum degassing is performed, and a silk powder / high polymer spinning solution is obtained;

[0009] S2. The silk powder / high polymer spinning solution is placed in a spinning device, is sprayed out of a single-hole spinning hole with a predetermined shape, the spinning stream enters a coagulation bath for a predetermined time, is drawn, dried, and an anti-ultraviolet fiber is obtained.

[0010] As a further improvement of the application, in step S1, the binary solvent is one of N,N-dimethylformamide / dimethyl sulfoxide, N,N-dimethylacetamide / dimethyl sulfoxide, and N,N-dimethylformamide / N,N-dimethylacetamide composition.

[0011] As a further improvement of the application, in the silk powder / high polymer spinning solution, the mass fraction of high polymer resin particles is 10%-40%, the mass fraction of silk powder is 0.1%-50%, and the mass fraction of binary mixed solvent is 30%-80%.

[0012] As a further improvement of the application, in step S2, the predetermined shape is one of a tripod type, a cross type, a pentagonal type, a three-leaf fan type with a hollow center, and a two-semi-circle clamping type.

[0013] As a further improvement of the application, in the binary mixed solvent, the mass ratio of the two solvents is 1:9-9:1.

[0014] As a further improvement of the application, in step S2, the draw ratio is 1-5 times.

[0015] As a further improvement of the application, in step S1, a predetermined proportion of silk powder is added to the binary mixed solvent, then high polymer resin particles are added, mechanical stirring is performed at 20-30°C for 100-200 min, after the high polymer resin particles and the silk powder are uniformly blended, vacuum degassing treatment is performed at 20-30°C for 100-140 min, and a silk powder / high polymer spinning solution is obtained.

[0016] As a further improvement of the application, in step S1, the high polymer is one of polyurethane, polyacrylonitrile, and polyvinyl butyral; and the silk powder is one or more of sericin powder and silk fibroin powder.

[0017] The present invention also provides an anti-ultraviolet fiber based on waste textile powder, which is prepared by the preparation method described above.

[0018] The present invention also provides an application of UV-resistant fibers based on waste textile powder, wherein the UV-resistant fibers based on waste textile powder are woven into UV-resistant textiles for use in the field of UV protection.

[0019] The beneficial effects of this invention are:

[0020] (1) The present invention provides a method for preparing UV-resistant fibers based on waste textile powder. First, polymer resin particles and silk powder are uniformly mixed in a binary solvent to obtain a homogeneous and stable spinning solution. Then, based on the principle of wet spinning, a spinning device with a specific spinneret structure is selected to obtain a spinning stream of a specific shape, which is then introduced into a water coagulation bath. Under the synergistic effect of the spinning stream shape and the binary solvent, the binary solvent in the spinning stream continuously replaces the water in the coagulation bath at a suitable rate, causing the polymer molecular chains to rearrange. The bonding structure formed between the polymer and silk powder is continuously adjusted and combined with water in the coagulation bath to obtain a preliminary shaped fiber with a specific structure. Then, during the stretching and high-temperature drying processes, the molecular chains of the polymer are further rearranged, and the arrangement structure of the polymer and silk powder is finely adjusted to form a multi-porous microporous structure. The resulting UV-resistant fiber has high porosity and uniform pore distribution. The rich multi-porous microporous structure, specific surface morphology, and synergistic effect of silk powder provide favorable conditions for reflecting and absorbing ultraviolet rays, thus achieving the UV-resistant effect.

[0021] (2) This invention is based on the preparation and processing of powder products generated from waste products in the silk industry. The properties of the powder are reused to prepare UV-resistant products. Simultaneously, without modifying the silk powder, a binary solvent system is used as the solvent for the spinning solution. This not only prevents large-area agglomeration of the silk powder but also effectively improves the interfacial bonding ability between the silk powder and the polymer resin, increasing the bonding strength between the two in the resulting fiber and regulating the mechanical properties of the fiber. It also promotes the formation of internal pore structures with varying morphologies. Compared with commercially available surface-reprocessed UV-resistant textiles, the textiles prepared by this invention have superior moisture absorption, processability, and wearability due to the special cross-sectional structure of the fibers.

[0022] (3) By preparing fibers with specific cross-sectional shapes, the present invention enhances the reflection and consumption of light on the fiber surface. Combined with various weaving techniques, it makes the water vapor more absorbed on the surface of the textile, giving it excellent moisture-wicking performance. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the structure of the spinneret orifice and the corresponding UV-resistant fiber.

[0024] Figure 2 This is a structural diagram of a fabric woven from UV-resistant fibers.

[0025] Figure 3 The absorption spectra of the UV-resistant fibers prepared in Example 1 and Comparative Example 8 are shown.

[0026] Figure 4 The reflectance spectra of the UV-resistant fibers prepared in Example 1 and Comparative Example 8 are shown. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0029] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] This invention provides a method for preparing UV-resistant fibers based on waste textile powder, comprising the following steps:

[0031] S1. Preparation of spinning solution:

[0032] Unmodified silk powder in a predetermined ratio is added to a binary mixed solvent, followed by polymer resin particles. The mixture is mechanically stirred at 20-30°C for 100-200 min. After the polymer resin particles and sericin powder are uniformly mixed and form a homogeneous and stable solution, the mixture is vacuum degassed at 20-30°C for 100-140 min to obtain a silk powder / polymer spinning solution.

[0033] In the silk powder / polymer spinning solution, the mass fraction of polymer resin particles is 10%-40%, the mass fraction of silk powder is 0.1%-50%, and the mass fraction of the binary mixed solvent is 30%-80%. Specifically, the polymer is one of polyurethane, polyacrylonitrile, and polyvinyl butyral, preferably polyurethane. The silk powder is one or more of sericin powder and fibroin powder, preferably sericin powder.

[0034] The binary solvent is one of N,N-dimethylformamide / dimethyl sulfoxide, N,N-dimethylacetamide / dimethyl sulfoxide, or a combination of N,N-dimethylformamide / N,N-dimethylacetamide, with N,N-dimethylformamide / dimethyl sulfoxide being preferred. In the binary mixed solvent, the mass ratio of the two solvents is 1:9 to 9:1.

[0035] First, compared to a single solvent, a binary solvent allows for more uniform dispersion of polymer resin particles and silk powder, resulting in a more homogeneous spinning solution. Second, compared to adding both polymer resin particles and silk powder simultaneously to a binary mixed solvent, the method described in this application first uniformly disperses the silk powder before adding the polymer resin particles, resulting in a more uniform spinning solution. Furthermore, compared to adding the polymer resin particles first and then the silk powder, the addition of the polymer resin particles alters the solution's viscosity, thus affecting the dispersibility of the silk powder. Additionally, compared to inorganic metal oxide powders, silk powder exhibits better compatibility with polymer resins, further improving the uniformity of the spinning solution's dispersion.

[0036] S2. Spinning and forming:

[0037] The silk powder / polymer spinning solution prepared in step S1 is placed in a spinning device and ejected from a single-hole spinning orifice of a predetermined shape. The spun fine stream enters a coagulation bath for a preset time, is stretched, and then dried and shaped at a high temperature of 40-80℃ to obtain UV-resistant fibers.

[0038] The predetermined shape of the spinneret orifice is a cross-shaped type, a tripod type (i.e., a structure similar to that formed from the center of an equilateral triangle to each vertex), a pentagonal type (i.e., a structure similar to that formed from the center of a regular pentagon to each vertex), a three-bladed fan type with a hollow center, or a two-semi-circular interlocking type, preferably. Figure 1 The diagram shows the cross-shaped, tripod-shaped, and pentagonal types. Specifically, Figure 1 The top image shows the shape of the spinneret, and the bottom image shows the corresponding structure of the resulting fiber. The spinning stream is ejected from a closed space, resulting in... Figure 1 The corresponding structure is shown.

[0039] The coagulation bath is water. The stretching ratio is 1-5 times.

[0040] In this process, the spinning solution is ejected from spinnerets with a specific structure, resulting in a fine spun yarn of a specific shape. This yarn then enters a water coagulation bath, where the binary solvent in the yarn continuously replaces the water in the coagulation bath at a suitable rate, causing the fiber to initially take shape. Under the synergistic effect of the yarn shape and the binary solvent, the bonding structure between the polymer and silk powder in the yarn is continuously adjusted. Simultaneously, the water in the coagulation bath combines with the polymer and silk powder to obtain a preliminary shaped fiber with a specific structure. Next, during the drawing process, the bonding structure between different substances further changes and tends to stabilize. After high-temperature drying, as the moisture evaporates, the bonding structure between the polymer and silk powder is finely adjusted, resulting in UV-resistant fibers with a rich microporous structure.

[0041] The present invention also provides an anti-ultraviolet fiber based on waste textile powder, which is prepared by the above-described preparation method.

[0042] This invention also provides an application of UV-resistant fibers based on waste textile powder, wherein the aforementioned UV-resistant fibers based on waste textile powder are woven into UV-resistant textiles for use in the field of UV protection. Specifically, the preparation of the UV-resistant textiles involves using the aforementioned UV-resistant fibers based on waste textile powder as weft yarns and cotton fibers as warp yarns, controlling the linear density of the weft and warp yarns to be similar, and then weaving or knitting them into a fabric as shown in the image. Figure 2 The plain weave fabric shown ( Figure 2 a) Weft twill fabric ( Figure 2 b). The fabric size is set at 10cm × 10cm.

[0043] The present invention will now be described in detail through specific embodiments.

[0044] Example 1

[0045] A method for preparing UV-resistant fibers based on waste textile powder includes the following steps:

[0046] S1. Preparation of spinning solution:

[0047] First, 42g of N,N-dimethylformamide and 28g of dimethyl sulfoxide were mixed evenly to obtain a binary solvent. Then, 15g of sericin powder was added to the binary solvent and ultrasonically dispersed for 10min. Next, 15g of polyurethane resin particles were added while continuously stirring, and mechanical stirring was continued at 20-30℃ using a top-mounted electronic stirrer for 180min, with the speed controlled at 600r / min. After the polymer resin particles and sericin powder were evenly mixed to form a homogeneous and stable solution, it was placed in a vacuum drying oven for degassing at room temperature for 120min until the bubbles were completely released, resulting in a sericin powder / polymer spinning solution.

[0048] That is, in the sericin powder / polymer spinning solution, the mass fraction of polyurethane resin particles is 15%, the mass fraction of sericin powder is 15%, and the mass fraction of the binary mixed solvent is 70%. The mass ratio of N,N-dimethylformamide and dimethyl sulfoxide in the binary solvent is 6:4.

[0049] S2. Spinning and forming:

[0050] The sericin powder / polymer spinning solution prepared in step S1 is placed in a spinning device, which is a pentagonal frame type (i.e., Figure 1 The single-hole spinning nozzle of the structure (c) is ejected, and the spinning fine stream enters the water coagulation bath for 15 minutes. After stretching, it is dried and shaped at a high temperature of 60°C to obtain UV-resistant fiber.

[0051] The parameters of the spinning device are as follows: injection flow rate 100 μL / min, injection volume set to 10 mL, winding speed 2 mm / s, and draw ratio 3.

[0052] Using the UV-resistant fiber based on waste textile powder prepared in Example 1 as the weft yarn and cotton fiber as the warp yarn, and controlling the linear density of the weft and warp yarns to be similar, a weaving pattern was formed as follows: Figure 2 The plain weave fabric shown in Figure a, with a size of 10cm × 10cm, was used to determine its UV protection level. The UV protection level was tested according to GB / T 18830-2009 "Evaluation of UV Protection Performance of Textiles".

[0053] Examples 2-5 and Comparative Examples 1-3

[0054] A method for preparing UV-resistant fibers based on waste textile powder differs from Example 1 in that, in step S1, the mass fractions (i.e., mass percentages) of polyurethane resin particles, sericin powder, and binary solvent in the sericin powder / polymer spinning solution are different. The other steps are largely the same as in Example 1 and will not be repeated here.

[0055] The UV-resistant fibers prepared in Examples 2-5 and Comparative Examples 1-4 were subjected to performance tests, and the results are shown in Table 1:

[0056] The UV protection factor is the UV protection factor of the woven fabric.

[0057] Table 1. UV-resistant fibers prepared in Examples 1-5 and Comparative Examples 1-4

[0058]

[0059]

[0060] As shown in Table 1, within a certain range, as the content of waste textile powder (i.e. sericin powder) in the spinning solution increases, the porosity and tensile strength of the fibers change, and the UV protection coefficient of the resulting woven fabric fluctuates within a certain range.

[0061] When the sericin powder content is too high or too low (Comparative Examples 1, 2, and 4), the porosity is significantly worse, and the tensile strength of the fiber and the UV protection coefficient of the woven fabric are both low. This indicates that the addition of sericin powder affects the fiber forming process, thereby affecting the fiber porosity and consequently its mechanical properties. Furthermore, changes in sericin powder content and fiber porosity affect the UV protection performance of the woven fabric. When the spinning solution concentration is low, all aspects of the fiber's properties are poor.

[0062] Examples 6-9 and Comparative Examples 5-6

[0063] A method for preparing UV-resistant fibers based on waste textile powder differs from Example 1 in that the mass ratio of N,N-dimethylformamide and dimethyl sulfoxide in the binary solvent is different in step S1. The rest is roughly the same as in Example 1 and will not be repeated here.

[0064] The UV-resistant fibers prepared in Examples 6-9 and Comparative Examples 5-6 were subjected to performance tests, and the results are shown in Table 2:

[0065] Table 2. UV-resistant fibers prepared in Examples 6-9 and Comparative Examples 5-6

[0066]

[0067]

[0068] As shown in Table 2, the polarity of the binary solvent changes with the change in the ratio of the two solvents in the binary solvent, which in turn affects the exchange process between water and the binary solvent in the coagulation bath, causing the polymer molecular chains to rearrange. At the same time, the addition of powder further changes the pore structure of the fiber. Under the synergistic effect, this affects its UV protection performance and mechanical properties.

[0069] When using only a single solvent, although the porosity is relatively high, its UV protection and mechanical properties are relatively poor.

[0070] Examples 10-11

[0071] A method for preparing UV-resistant fibers based on waste textile powder differs from Example 1 in that the type of binary solvent is different in step S1. Otherwise, it is largely the same as Example 1 and will not be described again here.

[0072] The UV-resistant fibers prepared in Examples 10-11 were subjected to performance tests, and the results are shown in Table 3.

[0073] Table 3. UV-resistant fibers prepared in Examples 10-11

[0074]

[0075] As shown in Table 3, the solubility and polarity of the solvents vary with the type of binary solvent, which affects the pore structure of the fiber and consequently its UV protection and mechanical properties.

[0076] Examples 12-13 and Comparative Example 7

[0077] A method for preparing UV-resistant fibers based on waste textile powder differs from Example 1 in that the draw ratio is different in step S2, while the rest is largely the same as in Example 1 and will not be described again here.

[0078] The UV-resistant fibers prepared in Examples 12-13 and Comparative Example 7 were subjected to performance tests, and the results are shown in Table 4:

[0079] Table 4. UV-resistant fibers prepared in Examples 12-13 and Comparative Example 7

[0080]

[0081] As shown in Table 4, with the increase of the draw ratio, the porosity of the fiber gradually decreases while the tensile strength gradually increases. This is mainly because the change in the draw ratio affects the arrangement of polyurethane molecules, thereby affecting the structure and properties of the fiber. When the draw ratio is too high, it has a significant impact on the porosity and structure of the fiber, resulting in poor UV protection performance.

[0082] Examples 14-15 and Comparative Example 8

[0083] A method for preparing UV-resistant fibers based on waste textile powder differs from Example 1 in that the structure of the spinneret orifice is different in step S2. Otherwise, it is largely the same as Example 1 and will not be described again here.

[0084] The UV-resistant fibers prepared in Examples 14-15 and Comparative Example 8 were subjected to performance tests, and the results are shown in Table 5:

[0085] Table 5. UV-resistant fibers prepared in Examples 14-15 and Comparative Example 8

[0086]

[0087]

[0088] As shown in Table 5, when the spinneret orifice changes, it will affect the pore structure and external morphology of the fiber, thus affecting the UV protection performance under the synergistic effect of the powder and the morphology structure.

[0089] Figure 3 The absorption spectra of the UV-resistant fibers prepared in Example 1 and Comparative Example 8 are shown below. Figure 4 The reflectance spectra of the UV-resistant fibers prepared in Example 1 and Comparative Example 8 are shown. Figure 3 It can be seen that the absorption peak of the fiber prepared in Example 1 in the ultraviolet light band is significantly lower than that of Comparative Example 8. Figure 4 It can be seen that the reflection peak of the fiber prepared in Example 1 in the ultraviolet light band is significantly higher than that of Comparative Example 8. This is mainly because the fiber prepared in Example 1 has a rich pore structure and a special fiber morphology, which can reflect ultraviolet light very well, while also absorbing it. Under the combined effect of absorption and reflection, the amount of ultraviolet light reaching the human body surface is reduced, thus playing a role in ultraviolet protection for the human body.

[0090] Comparative Example 9

[0091] A method for preparing UV-resistant fibers based on waste textile powder differs from Example 1 in that, in step S1, the binary solvent is a mixture of N,N-dimethylformamide and toluene. Other steps are largely the same as in Example 1 and will not be repeated here. The UV-resistant fiber obtained in Comparative Example 9 has a porosity of 58%, the UV protection factor of the woven fabric is 40.95, and the tensile strength of the fiber is 0.93, significantly worse than that of Example 1. This is mainly because the binary mixed solvent in Comparative Example 9 has a different displacement mechanism with the coagulation bath than the binary mixed solvent in Example 1, thus affecting the pore structure of the fiber and consequently its performance.

[0092] Comparative Example 10

[0093] A method for preparing UV-resistant fibers based on waste textile powder is disclosed. Compared to Example 1, the difference lies in that, in step S1, the sericin powder is replaced with titanium dioxide nanoparticles. The rest is largely the same as Example 1 and will not be repeated here. The UV-resistant fiber obtained in Comparative Example 10 has a porosity of 58%, the woven fabric has a UV protection factor of 38.77, and the fiber's tensile strength is 1.35. These properties are significantly worse than those of Example 1, indicating that the presence of inorganic powder affects the fiber's structure and properties to some extent.

[0094] In summary, this invention provides an anti-UV fiber based on waste textile powder, its preparation method, and its application. During fiber preparation, a binary solvent is used to uniformly mix polymer resin particles and silk powder. Simultaneously, during wet spinning, a spinning device with a specific spinneret structure is selected to obtain a spinning stream of a specific shape. Under the synergistic effect of the spinning stream shape and the binary solvent, the polymer molecular chains continuously rearrange, and the arrangement of the polymer and silk powder is continuously adjusted, ultimately resulting in a fiber with a multi-porous microporous structure. The obtained anti-UV fiber has high porosity and uniform pore distribution. The multi-porous structure, specific surface morphology, and the synergistic effect of the silk powder provide favorable conditions for reflecting and absorbing more ultraviolet rays, achieving an anti-UV effect while also improving moisture absorption.

[0095] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for the preparation of an ultraviolet resistant fiber based on waste textile powder, characterized by, It comprises the following steps: S1. A predetermined proportion of polymer resin particles, unmodified silk powder and binary mixed solvent are mechanically blended, vacuum degassing to obtain a silk powder / polymer spinning solution; the polymer is one of polyurethane, polyacrylonitrile and polyvinyl butyral; the binary mixed solvent is one of N,N-dimethylformamide / dimethyl sulfoxide, N,N-dimethylacetamide / dimethyl sulfoxide and N,N-dimethylformamide / N,N-dimethylacetamide composition; in the silk powder / polymer spinning solution, the mass fraction of polymer resin particles is 10%-40%, the mass fraction of silk powder is 0.1%-50%, and the mass fraction of binary mixed solvent is 30%-80%; S2. The silk powder / polymer spinning solution is placed in a spinning device, sprayed from a single-hole spinning hole with a predetermined shape, and the spinning stream enters the coagulation bath for a predetermined time, and then is drawn, dried to obtain an anti-ultraviolet fiber; the predetermined shape is one of tripod type, cross type, pentagonal type, three-leaf fan type with hollow center and two half-circle engagement type; the coagulation bath is water, and the draw ratio is 1-5 times.

2. The method for preparing UV-resistant fibers based on waste textile powder according to claim 1, characterized in that, In the binary mixed solvent, the mass ratio of the two solvents is 1:9-9:

1.

3. The method for preparing UV-resistant fibers based on waste textile powder according to claim 1, characterized in that, In step S1, the silk powder is one or more of sericin powder and fibroin powder.

4. The method for preparing UV-resistant fibers based on waste textile powder according to claim 1, characterized in that, The preparation method is prepared by using the preparation method in any one of claims 1-4.

5. A UV resistant fiber based on waste textile powder, characterized in that, The anti-ultraviolet fiber based on the waste textile powder is woven into an anti-ultraviolet textile for use in the field of ultraviolet protection.

6. An anti-UV fiber prepared by a method of claim any one of claims 1 to 4 or an application of the anti-UV fiber based on the waste textile powder of claim 5, characterized in that, ​

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