Plateau cold-resistant textile fabric and preparation method thereof

Abstract

The invention discloses a plateau cold-resistant textile fabric and a preparation method thereof. The fabric comprises a skin-friendly layer and an anti-aging layer; the raw materials of the skin-friendly layer mainly comprise cotton fibers and cheese protein fibers which are co-spun with the cotton fibers; the raw materials of the anti-aging layer mainly comprise cotton fibers, modal fibers and acrylic fibers, wherein the modal fibers and the acrylic fibers are co-spun with the cotton fibers; the cheese protein fiber comprises the following main components: cheese protein, a modifying agent for modifying the cheese protein and a covalent compounding agent, the cheese protein and the modifying agent are synthesized to form coupling modified fibers; the cheese protein and the covalent compound agent are synthesized to form a covalent composite fiber, and the coupling modified fiber and the covalent composite fiber are co-spun to obtain the cheese protein fiber. The anti-ultraviolet textile fabric can be used for keeping the comfort level and the warm keeping effect of the textile fabric, and meanwhile, the anti-ultraviolet effect of the textile fabric can be improved, so that a wearer has better wearing experience.

Description

Technical Field

[0001] The invention relates to the technical field of cold-resistant fabrics, in particular to a plateau cold-resistant textile fabric and a preparation method thereof. Background Art

[0002] With the continuous progress of economic and social development and the improvement of material living standards, people are increasingly concerned about their health and living environment. Since protein is an essential component of the human body, protein fiber is currently widely used as a functional fiber, offering unique advantages in skin care, moisturizing, softness and comfort. Collagen, silkworm pupa protein, feather protein, cashmere protein, and other proteins have been added to the spinning market and have achieved excellent results when blended with cotton, linen, silk, and various other fibers.

[0003] Currently, there's a type of casein fiber. It's made from casein extracted from the milk of mammals like sheep and cows. The peptides released through biotechnology are blended and spun with wood pulp or cotton pulp. Casein fiber fabrics are smooth next to the skin, lightweight, comfortable, and provide excellent warmth retention, making them ideal for next-to-skin warmth. Fabrics made from casein fiber offer excellent cold resistance and a pleasant feel.

[0004] However, the anti-ultraviolet effect of cheese protein fiber is average. This is because cheese protein mainly contains tyrosine. In high-altitude areas with strong ultraviolet rays, the molecules are easily affected by ultraviolet rays, causing the atoms on the adjacent peptide chains of the protein in the crystalline area to form new chemical bonds (bridging) or causing the peptide bonds in the non-protein crystalline area to break. This will cause the fabric to appear yellowing of protein, while affecting the skin feel when worn and reducing the warmth of the fabric. At present, the yellowing of the fabric is generally reduced by co-spinning cheese protein fiber with modal fiber and acrylic fiber, and reducing the co-spinning ratio of cheese protein fiber; however, its comfort and warmth effect will be reduced accordingly. For this reason, this application provides a solution. Summary of the Invention

[0005] The present application provides a plateau cold-resistant textile fabric and a preparation method thereof, which can be used to maintain the comfort and warmth-keeping effect of the textile fabric while improving its anti-ultraviolet effect, so that the wearer has a better wearing experience.

[0006] The present application provides a plateau cold-resistant textile fabric, which includes a skin-friendly layer and an anti-aging layer; the raw materials of the skin-friendly layer mainly include cotton fibers and casein fibers co-spun with the cotton fibers; the raw materials of the anti-aging layer mainly include cotton fibers and modal fibers and acrylic fibers co-spun with the cotton fibers; the main components of the casein fibers include casein, a modifying modifier for modifying the casein, and a covalent compounding agent; the casein and the modifying modifier are synthesized to form coupled modified fibers; the casein and the covalent compounding agent are synthesized to form covalent composite fibers, and the coupled modified fibers and the covalent composite fibers are co-spun to obtain the casein fibers.

[0007] By adopting the above technical scheme, the part in the cheese protein fiber is modified by a modification modifier to the tyrosine on the cheese protein, by it and carrying out a coupled reaction, to improve its UV-resistant effect. In addition, another part in the cheese protein fiber is modified by a covalent compounding agent to the cheese protein, by the multipolar functional group on the covalent compounding agent can interact with the exposed hydroxyl or amino groups on the cheese protein to generate a covalent bond, and then it is made to have certain antioxidant properties, improve anti-aging effect, increase the service life of wearing. While the application helps to keep the comfort and warmth-keeping effect of textile fabrics, the wearer is provided with a better wearing experience.

[0008] Preferably, the raw materials of the modification modifier include diazonium salt and coupling buffer; the raw materials of the diazonium salt include o-nitroaniline, sodium nitrite, hydrochloric acid and deionized water; the raw materials of the coupling modifier include disodium hydrogen phosphate, citric acid and deionized water.

[0009] By adopting the above technical solution, the present application forms a diazonium salt through o-nitroaniline, sodium nitrite, hydrochloric acid and deionized water, and carries out a coupling reaction with tyrosine through o-nitroaniline diazonium salt; in addition, a coupling modifier is configured through disodium hydrogen phosphate, citric acid and deionized water and a benzotriazole structure is formed through reduction and ring closure by the coupling modifier. At present, the benzotriazole structure UV absorber is a highly efficient light stabilizer. Because of its low toxicity and strong ability to absorb ultraviolet rays, it is widely used in polymer materials such as polyester resins, polyolefins, food packaging, cosmetics and coatings. The present application improves the UV resistance of cheese protein fiber by constructing a benzotriazole structure on cheese protein.

[0010] Preferably, the weight ratio of the o-nitroaniline, the sodium nitrite, the hydrochloric acid and the deionized water is (3-5): (1-3): (6-12): (15-20); the weight percentage concentration of the hydrochloric acid is 36wt%.

[0011] Preferably, the raw materials of the covalent compounding agent include high ester pectin and chlorogenic acid.

[0012] By adopting the above technical solution, chlorogenic acid is a polar organic acid that has antioxidant effects due to its phenolic hydroxyl group content and is widely used in food, health care and medicine. High-ester pectin can exhibit a higher zeta potential through electrostatic complexation with casein, thereby forcing chlorogenic acid to form a ternary complex, thereby improving the antioxidant properties of casein.

[0013] Preferably, the weight ratio of the casein solution, the high-ester pectin solution and the chlorogenic acid solution is (1-3): (2-5): (2-5); the weight percentage concentration of the high-ester pectin solution is 4wt%; and the weight percentage concentration of the chlorogenic acid solution is 2wt%.

[0014] On the other hand, the present application discloses a method for preparing a plateau cold-resistant textile fabric, comprising the following steps: S1, preparation of coupling-modified fiber: controlling the proportion of hydrochloric acid and water, mixing and heating to 60-80°C, adding a certain mass of o-nitroaniline and stirring until the o-nitroaniline is dissolved, and then cooling to 0-5°C, slowly dripping a certain proportion of sodium nitrite solution, reacting for 2-5 hours, and controlling the temperature at about 0°C to obtain a mixed solution with diazonium salt; disodium hydrogen phosphate, citric acid and deionized water are mixed in proportion to prepare a solution of a coupling modifier, and poured into the mixed solution of diazonium salt; then immersing a certain mass of casein in the diazonium salt mixed solution; maintaining the temperature of the solution at about 5-15°C, and coupling reaction for 3-5 hours; and adding a certain mass of bio-based polyvinyl alcohol, mixing to obtain a first spinning solution, and wet spinning the first spinning solution to obtain coupling-modified fiber; S. Preparation of covalent composite fibers: a certain mass of cheese protein powder is dissolved in deionized water, and a certain concentration of sodium hydroxide is added to control the pH of the solution between 8 and 9, and then 4 wt% of a high-ester pectin solution and 2 wt% of a chlorogenic acid solution are added in proportion; the mixture is then dialyzed in a dialysis bag at 4°C for 48 hours, and the dialyzed mixed solution is freeze-dried and then used to obtain a composite protein; the reserved composite protein is mixed and dissolved with a certain proportion of bio-based polyvinyl alcohol, and the obtained second spinning solution is wet-spun to obtain a covalent composite fiber; S3 1. Preparation of cheese protein fiber: the coupled modified fiber and the covalent composite fiber are blended into yarn to obtain cheese protein fiber, wherein the coupled modified fiber accounts for 55%-75% and the covalent composite fiber accounts for 45%-25%; S4. Preparation of cold-resistant textile fabric: the casein fiber and the cotton fiber are blended into yarn and woven into skin-friendly layer fabric; the cotton fiber, the modal fiber and the acrylic fiber are blended into yarn and woven into anti-aging layer fabric; the skin-friendly layer fabric and the anti-aging layer fabric are integrated to obtain cold-resistant fabric.

[0015] Preferably, in the preparation of the coupled modified fiber, the first spinning solution is transported to a dynamic mixer at a pressure of 0.2-0.8 MPa through a metering pump for high-speed shear compounding to form a uniform spinning solution; then transported to a filter for filtration, a spinneret assembly, and a spinneret for spinning; the spinneret diameter is 0.05-0.10 mm, the spinneret aspect ratio is 3:1, and the spinning pressure is 0.4-0.8 MPa.

[0016] Preferably, in the preparation of the covalent composite fiber, the second spinning solution is transported to a dynamic mixer at a pressure of 0.3-0.9 MPa through a metering pump for high-speed shear compounding to form a uniform spinning solution; then it is transported to a filter for filtration, a spinneret assembly, and a spinneret for spinning; the spinneret diameter is 0.06-0.12 mm, the spinneret aspect ratio is 2:1, and the spinning pressure is 0.3-0.9 MPa.

[0017] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. The present application is to modify the tyrosine on the cheese protein in a part of the cheese protein fiber by a modification modifier; and modify the cheese protein in another part of the cheese protein fiber by a covalent compounding agent, thereby making it have certain antioxidant properties, improving the anti-aging effect, and increasing the service life of wearing.

[0018] 2. The present application couples o-nitroaniline diazonium salt with tyrosine, and then reduces and closes the ring to form a benzotriazole structure through a coupling modifier, thereby improving the UV resistance of cheese protein fiber.

[0019] 3. The present application uses high-ester pectin to exhibit a higher zeta potential through electrostatic complexation with casein, thereby forcing the formation of a ternary complex between chlorogenic acid and casein, thereby improving the antioxidant properties of casein. DETAILED DESCRIPTION

[0020] The present application provides a plateau cold-resistant textile fabric and a preparation method thereof, which can be used to maintain the comfort and warmth-keeping effect of the textile fabric while improving its anti-ultraviolet effect, so that the wearer has a better wearing experience.

[0021] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those described. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices.

[0023] raw material Casein: Using cow's milk as the basic raw material, it is dehydrated, deoiled, defatted, separated and purified to become a cheese protein with a linear macromolecular structure.

[0024] Cotton fiber: Use commercially available cotton fiber, and the cotton fiber obtained by spinning has a dry breaking strength of ≥3.5cn / dtex; the coefficient of variation of dry breaking strength ≤18%; the coefficient of variation of dry breaking elongation ≤12%.

[0025] Modal fiber: It is a fiber currently available on the market, made from pulp formed by crushing renewable bamboo, wood, etc. Its dry strength is close to that of polyester, and its wet strength is better than ordinary viscose.

[0026] Acrylic fiber: It uses the currently commercially available acrylic staple fiber, which is soft, light, warm, corrosion-resistant and light-resistant.

[0027] o-Nitroaniline: CAS number 88-74-4, molecular weight 138.124, purity 98.0%.

[0028] Sodium nitrite: CAS No. 7632-00-0, molecular weight 68.995, chemically pure.

[0029] Hydrochloric acid: CAS number 7647-01-0, molecular weight 36.461, concentration 36%.

[0030] Disodium hydrogen phosphate: CAS number 7558-79-4, molecular weight 141.96, purity 99.5%.

[0031] Citric acid: CAS No. 99026-99-0, molecular weight 502.51, purity 99.5% Example 1-1

[0032] S1. Preparation of coupled modified fibers: 600 g of 36% hydrochloric acid solution and 1.5 kg of deionized water were heated to 70°C, and 300 g of o-nitroaniline was added and stirred until the o-nitroaniline was dissolved. After cooling to 4°C, 100 g of sodium nitrite solution was slowly added dropwise, and the reaction was carried out for 3 hours. The temperature was controlled at about 0°C to obtain a mixed solution with diazonium salt. The mixed solution of diazonium salt was detected with starch-potassium iodide test paper, and the excess sodium nitrite was removed with urea. Then, disodium hydrogen phosphate, citric acid and deionized water were mixed in proportion to prepare 40 g of coupling modifier solution (the weight ratio of disodium hydrogen phosphate, citric acid and deionized water was 3:7:10), and poured into the mixed solution of diazonium salt, and stored at 0-4°C for later use.

[0033] Then 100g of casein is immersed in 150g of the above-mentioned diazonium salt mixed solution; the temperature of the solution is maintained at about 10°C, and the coupling reaction is carried out for 4h. The mixed solution after the reaction is then subjected to ultrasonic centrifugation, 90g of the emulsion after centrifugation is taken, 65g of bio-based polyvinyl alcohol and 160g of viscose spinning solution (mainly natural cellulose such as cotton pulp and wood pulp, which is a viscous solution made through chemical reactions such as alkalization and yellowing) are added, and the two are mixed to obtain a first spinning solution, which is then conveyed through a metering pump to a dynamic mixer at a pressure of 0.6Mpa for high-speed shear compounding to form a uniform spinning solution; then it is conveyed to a filter for filtration, a spinneret assembly, and a spinneret for spinning; the spinneret diameter is 0.08mm, the spinneret aspect ratio is 3:1, and the spinning pressure is 0.6Mpa; thereby obtaining a coupled modified fiber; S2. Preparation of covalent composite fibers: 100 g of cheese protein powder was dissolved in deionized water, and a standard concentration of sodium hydroxide was added to control the pH of the solution to be between 8.5, and then 200 g of a 4 wt% high-ester pectin solution and 200 g of a 2 wt% chlorogenic acid solution were added in proportion; the mixture was then dialyzed in a dialysis bag at 4 ° C for 48 h, and the dialyzed mixed solution was freeze-dried for standby use to obtain a composite protein; 80 g of the reserved composite protein was mixed and dissolved with 50 g of bio-based polyvinyl alcohol, and 120 g of viscose spinning solution was added to obtain a second spinning solution; the second spinning solution was conveyed to a dynamic mixer at a pressure of 0.7 MPa through a metering pump for high-speed shear compounding to form a uniform spinning solution; the solution was then conveyed to a filter for filtration, a spinneret assembly, and a spinneret for spinning; the spinneret diameter was 0.10 mm, the spinneret aspect ratio was 2:1, and the spinning pressure was 0.6 MPa; and covalent composite fibers were obtained.

[0034] S3. Preparation of cheese protein fiber: The coupled modified fiber and the covalent composite fiber obtained above are stretched and dried and heat-stretched respectively; then, the fiber is washed and oiled, and then the fibers are curled, cut and dried; finally, the coupled modified fiber and the covalent composite fiber are blended into yarn to obtain cheese protein fiber, in which the coupled modified fiber accounts for 65% and the covalent composite fiber accounts for 35%.

[0035] S4. Preparation of cold-resistant textile fabrics: blending yarns of cheese protein fiber and cotton fiber and weaving the blended yarns into skin-friendly layer fabrics; blending yarns of cotton fiber, modal fiber and acrylic fiber and weaving the blended yarns into anti-aging layer fabrics; integrating the skin-friendly layer fabric and the anti-aging layer fabric to obtain cold-resistant fabrics.

[0036] Examples 2-4 The difference between Examples 2-4 and Example 1 is that the weight ratios of o-nitroaniline, sodium nitrite, hydrochloric acid, and deionized water in the raw materials of the modified agent are different. The specific ratios are summarized in Table 1 below.

[0037] Examples 5-8 The difference between Examples 5-8 and Example 1 is that the weight ratios of the casein solution, high-ester pectin solution, and chlorogenic acid solution in the raw materials of the covalent compounding agent are different. The specific ratios are summarized in Table 1 below.

[0038] Table 1. Component ratios of modified modifiers and covalent compounding agents

[0039]

[0040] Comparative Example 1-1 The difference between Comparative Example 1 and Example 1 is that the raw material of the skin-friendly layer is mainly cotton fiber, and the cheese protein fiber is not blended with the cotton fiber.

[0041] Comparative Example 2-1 The difference between Comparative Example 2 and Example 1 is that the raw materials of the skin-friendly layer are mainly cotton fiber and cheese protein fiber, but no modifying agent and covalent compounding agent are added to the cheese protein fiber.

[0042] Comparative Example 3-1 The difference between Comparative Example 3 and Example 1 is that, during the preparation of the cheese protein fibers, no modifying agent was added to prepare the coupled modified fibers.

[0043] Comparative Example 4-1 The difference between Comparative Example 4 and Example 1 is that, during the preparation of cheese protein fibers, no covalent compounding agent was added to prepare the covalent composite fibers.

[0044] Performance testing experiment The textile fabric prepared in this application was placed in a UV aging box for testing, where the test temperature was 4°C, the relative humidity was 60%, the UV wavelength was 350nm, and the UV irradiation intensity was 0.78W / m. Samples were taken at intervals of 0h, 48h, 120h, and 240h and tested for physiological comfort performance and thermal insulation performance.

[0045] 1. Physiological comfort performance testing: Testing was conducted in accordance with GB / T 11048-2008, "Textiles for physiological comfort - Determination of thermal and moisture resistance under steady-state conditions." This application utilizes an evaporative hot plate method, which includes both thermal and moisture resistance tests. The test data is summarized in Table 2 below.

[0046] 2. Thermal insulation performance test: Using the flat plate constant temperature difference heat dissipation method, calculate the percentage of the difference between the heat dissipation without the sample and the heat dissipation with the sample to the heat dissipation without the sample, and record it as the thermal insulation rate H (unit %). The data are organized as shown in Table 2 below.

[0047] 3. Antioxidant performance test According to the China Cotton Textile Association standard, T / CCTA 20102-2023, "Determination and Evaluation of Antioxidant Capacity of Textiles - DPPH and ABTS Methods," this application uses the DPPH method to test the antioxidant properties of textile fabrics. DPPH provides free radicals that pair with one electron provided by the antioxidant textile. A visible spectrophotometer is then used to analyze the absorbance of the colorless or light yellow color to determine the scavenging rate (in %) of the P radicals. The antioxidant rating is then assessed based on the free radical scavenging rate, as shown in Table 2.

[0048] Among them, when P≥70%, the textile fabric has extremely strong antioxidant ability, which is recorded as level 3; when P =40%-70%, the textile fabric has good antioxidant ability, which is recorded as level 2.

[0049] Table 2. Performance test table of Examples 1-8 and Comparative Examples 1-3

[0050] Conclusion Analysis Wherein by comparative example 1 and embodiment 1 between analysis, wherein, comparative example 1 and embodiment 1 difference is, the raw material of skin-friendly layer is mainly cotton fiber, and cheese protein fiber does not participate in the blending of cotton fiber.Because cotton fiber does not have the texture of cheese protein fiber, its physiological comfort is much lower than cheese protein fiber.And along with under ultraviolet irradiation, the result change of its thermal resistance test and moisture resistance test is little, but far does not reach the comfort of cheese protein fiber.In addition, in conjunction with comparative example 2, in comparative example 2, with the difference of embodiment 1, cheese protein fiber does not add modification modifier and covalent compounding agent, and can pass through data analysis, add modification modifier and covalent compounding agent, can improve the anti-ultraviolet effect and the antioxidant capacity of cheese protein fiber.

[0051] Then the difference between Example 1 and Comparative Example 3 is that, in the process of preparing cheese protein fiber, no modified modifier is added to prepare coupled modified fiber. The present application forms a diazonium salt by o-nitroaniline, sodium nitrite, hydrochloric acid and deionized water, and couples o-nitroaniline diazonium salt with tyrosine; in addition, a coupling modifier is configured by disodium hydrogen phosphate, citric acid and deionized water and a benzotriazole structure is formed by reduction ring closure of the coupling modifier, thereby giving the cheese protein fiber a certain anti-ultraviolet effect. Therefore, the textile fabric in Comparative Example 2 cannot maintain sufficiently strong comfort and warmth in the ultraviolet aging experiment because no modified modifier is added to prepare coupled modified fiber.

[0052] In addition, comparative example 4 and comparative example 1 are analyzed. The difference between comparative example 4 and example 1 is that no covalent compounding agent is added to prepare the covalent composite fiber during the preparation of the cheese protein fiber. The high ester pectin and chlorogenic acid are modified by a covalent compounding agent to modify the cheese protein, thereby giving it a certain antioxidant property, improving the anti-aging effect, and increasing the service life of wearing, which can be analyzed by data.

[0053] Then, through the analysis between Examples 1-4, among them, the difference between Examples 2-4 and Example 1 is that the weight ratios of o-nitroaniline, sodium nitrite, hydrochloric acid and deionized water in the raw materials of the modification modifier are different. The purpose of the modification is to modify the tyrosine on the casein by the modification modifier, and to improve its UV resistance by coupling reaction. Therefore, it was found that when the ratio of o-nitroaniline, sodium nitrite, hydrochloric acid and deionized water is 4:2:7:16, the prepared cold-resistant textile fabric can maintain sufficiently strong comfort and warmth under strong ultraviolet irradiation. Among them, in Example 2, the reduction in thermal resistance is the smallest, the increase in moisture resistance is also the smallest, and the decrease in thermal insulation rate H is also the smallest, so Example 2 is the optimal embodiment of Examples 1-4.

[0054] Then, Examples 5-8 were analyzed in conjunction with Example 1, in which the weight ratios of the casein solution, high-ester pectin solution, and chlorogenic acid solution in the raw materials of the covalent compounding agent were different. Since the casein fiber can modify the casein by the covalent compounding agent, the multipolar functional groups on the covalent compounding agent can interact with the exposed hydroxyl or amino groups on the casein to form covalent bonds, thereby imparting certain antioxidant properties. According to the above analysis, the casein solution, high-ester pectin solution, and chlorogenic acid solution have an excellent antioxidant effect when the weight ratio is 1:2:2.

[0055] The plateau cold-resistant textile fabric disclosed in this application contains cheese protein fiber, which is different from natural fibers such as cotton, linen, silk, and wool, and is also different from chemical fibers such as nylon, acrylic, polyester, and polypropylene. Its performance is between natural fibers and synthetic fibers.

[0056] This application also tests the physical and chemical indicators of cheese protein fiber, including dry breaking strength ≥3.5cn / dtex; dry breaking elongation 18.0% to 28.0%; dyeing uniformity (gray card) ≥3 to 4 levels; and fiber antibacterial rate ≥90%.

[0057] And because cheese protein fiber is rich in multiple amino acids, the skin-friendly fabric prepared with cheese protein fiber can reduce the probability of skin aging and itching, thereby achieving the effect of nourishing the skin; in addition, cheese protein fiber has a natural moisturizing factor, so it can maintain the skin's moisture content, make the skin soft and smooth, reduce wrinkles, and has a broad-spectrum antibacterial function.

[0058] Furthermore, cheese protein fiber has a good effect on fiber comfort. This is because cheese protein fiber has a fine monofilament fineness, a light specific gravity, and its elongation at break, curl elasticity, and curl recovery rate are closest to cashmere and wool. At the same time, the cross-section of cheese protein fiber is full of gaps and has many grooves in the longitudinal direction. Protein molecules are distributed on the surface of the fiber, containing natural protein moisturizing factors and a large number of hydrophilic groups, which can quickly absorb human sweat and keep people's skin dry. Moreover, due to its microporous structure and the groove structure on the longitudinal surface, the micropores on the cold-resistant textile fabric in this application can absorb heat emitted by the body, effectively blocking air circulation and preventing cold air intrusion, making it light and warm.

[0059] It should be noted that the order in which the embodiments of the present application are presented is for illustrative purposes only and does not necessarily represent the superiority or inferiority of the embodiments. Furthermore, the foregoing descriptions of specific embodiments of this specification are provided. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in an order different from that in the embodiments and still achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0060] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

[0061] This description is merely an illustrative description of the present application and is intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, to the extent such modifications and variations fall within the scope of the present application and its equivalents, the present application is intended to include such modifications and variations.

Claims

1. A plateau cold-resistant textile fabric, characterized in that: The fabric comprises a skin-friendly layer and an anti-aging layer; The raw materials of the skin-friendly layer mainly include cotton fiber and cheese protein fiber co-spun with the cotton fiber; the raw materials of the anti-aging layer mainly include cotton fiber and modal fiber and acrylic fiber co-spun with the cotton fiber; The main components of the casein fiber include casein, a modifying agent for modifying the casein, and a covalent compounding agent; The casein and the modified modifier are synthesized to form coupled modified fibers; the casein and the covalent compounding agent are synthesized to form covalent composite fibers, and the coupled modified fibers and the covalent composite fibers are co-spun to obtain the casein fibers.

2. The plateau cold-resistant textile fabric according to claim 1, characterized in that: The raw materials of the modification modifier include diazonium salt and coupling buffer; the raw materials of the diazonium salt include o-nitroaniline, sodium nitrite, hydrochloric acid and deionized water; the raw materials of the coupling modifier include disodium hydrogen phosphate, citric acid and deionized water.

3. The plateau cold-resistant textile fabric according to claim 2, characterized in that: The weight ratio of the o-nitroaniline, the sodium nitrite, the hydrochloric acid and the deionized water is (3-5): (1-3): (6-12): (15-20); the weight percentage concentration of the hydrochloric acid is 36wt%.

4. The plateau cold-resistant textile fabric according to claim 1, characterized in that: The raw materials of the covalent compounding agent include high-ester pectin and chlorogenic acid.

5. The plateau cold-resistant textile fabric according to claim 1, characterized in that: The weight ratio of the casein solution, the high-ester pectin solution and the chlorogenic acid solution is (1-3): (2-5): (2-5); the weight percentage concentration of the high-ester pectin solution is 4wt%; and the weight percentage concentration of the chlorogenic acid solution is 2wt%.

6. A method for preparing the plateau cold-resistant textile fabric according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Preparation of coupling-modified fibers: controlling the ratio of hydrochloric acid and water, mixing and heating to 60-80°C, adding a certain amount of o-nitroaniline, mixing and stirring until the o-nitroaniline is dissolved, and then cooling to 0-5°C, slowly dropping a certain proportion of sodium nitrite solution, reacting for 2-5 hours, and controlling the temperature at about 0°C to obtain a mixed solution with diazonium salt; mixing disodium hydrogen phosphate, citric acid and deionized water in proportion to prepare a coupling modifier solution, and pouring the solution into the diazonium salt mixed solution; then immersing a certain amount of casein in the diazonium salt mixed solution; maintaining the temperature of the solution at about 5-15°C, and carrying out the coupling reaction for 3-5 hours; and adding a certain amount of bio-based polyvinyl alcohol, mixing to obtain a first spinning solution, and wet-spinning the first spinning solution to obtain coupling-modified fibers; S2. Preparation of covalent composite fibers: dissolving a certain mass of cheese protein powder in deionized water, adding a certain concentration of sodium hydroxide, controlling the pH of the solution between 8 and 9, and then adding 4 wt % of a high-ester pectin solution and 2 wt % of a chlorogenic acid solution in proportion; then dialyzing the mixture in a dialysis bag at 4° C. for 48 hours, and freeze-drying the dialyzed mixed solution for standby use to obtain a composite protein; mixing and dissolving the standby composite protein with a certain proportion of bio-based polyvinyl alcohol, and wet-spinning the obtained second spinning solution to obtain covalent composite fibers; S3. Preparation of casein fiber: blending the coupled modified fiber and the covalent composite fiber to obtain casein fiber, wherein the coupled modified fiber accounts for 55%-75% of the casein fiber and the covalent composite fiber accounts for 45%-25% of the casein fiber; S4, preparation of cold-resistant textile fabric: blending the casein fiber and the cotton fiber into a yarn and weaving the yarn into a skin-friendly layer fabric; blending the cotton fiber, the modal fiber and the acrylic fiber into a yarn and weaving the yarn into an anti-aging layer fabric; The skin-friendly layer fabric and the anti-aging layer fabric are integrated to obtain a cold-resistant fabric.

7. The method for preparing the plateau cold-resistant textile fabric according to claim 6, characterized in that: In the preparation of the coupled modified fiber, the first spinning solution is transported through a metering pump to a dynamic mixer at a pressure of 0.2-0.8 MPa for high-speed shear compounding to form a uniform spinning solution; then the solution is transported to a filter for filtration, a spinneret assembly, and a spinneret for spinning; the spinneret hole diameter is 0.05-0.10 mm, the spinneret hole aspect ratio is 3:1, and the spinning pressure is 0.4-0.8 MPa.

8. The method for preparing the plateau cold-resistant textile fabric according to claim 6, characterized in that: In the preparation of the covalent composite fiber, the second spinning solution is transported to a dynamic mixer at a pressure of 0.3-0.9 MPa through a metering pump for high-speed shear compounding to form a uniform spinning solution; then it is transported to a filter for filtration, a spinneret assembly, and a spinneret for spinning; the spinneret diameter is 0.06-0.12 mm, the spinneret aspect ratio is 2:1, and the spinning pressure is 0.3-0.9 MPa.

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