Antiviral breathable textile fabric and preparation method thereof

Abstract

The invention relates to the technical field of textile fabrics, in particular to an anti-virus breathable textile fabric and a preparation method thereof.The preparation method of the textile fabric comprises the steps that 1, natural fibers and synthetic fibers are mixed and spun into blended yarn through a ring spinning technology; 2, the blended yarn is pretreated, and pretreated yarn is prepared; step 3, immersing the pretreated yarn into an antiviral functional solution, carrying out constant-temperature water bath oscillation pre-drying, and baking to obtain an antiviral yarn; and 4, weaving the anti-virus yarns through a plain weaving process, soaking the woven fabric in the finishing liquid, and carrying out padding treatment, pre-drying and baking to obtain the anti-virus breathable textile fabric. The prepared textile fabric has high air permeability, the initial antiviral performance and the antiviral performance after washing are both kept at a high level, the anti-pilling performance of the fabric is excellent, and the fabric has good durability and attractiveness and is suitable for application scenes of various high-end textiles.

Description

Technical Field

[0001] The present application relates to the technical field of textile fabrics, and more specifically, to an antiviral and breathable textile fabric and a preparation method thereof. Background Art

[0002] Driven by escalating global public health and safety demands and the increasing demand for functionalization in the consumer market, the development of antiviral, breathable textile fabrics has become a core area of ​​technological innovation in the textile industry. Traditional protective fabrics rely on physical barriers. While they can intercept viral particles, they suffer from poor breathability and inactivate viruses. Existing antiviral finishing technologies (such as nanosilver loading and quaternary ammonium salt coatings) can achieve a certain degree of viral inactivation, but they suffer from insufficient washability, easy shedding after repeated washings, significant degradation of antiviral performance, and complex manufacturing processes.

[0003] Balancing antiviral properties with breathability remains a persistent industry challenge. While fabrics coated with chemicals can achieve antiviral properties through chemical treatments, the coatings clog fiber pores, reducing air permeability. While spinning-grade antimicrobial technology can improve durability, its photothermal effect relies on external energy input, and uneven graphene dispersion can lead to a decrease in the fabric's mechanical properties. Furthermore, most antiviral fabrics are limited in functionality, making them difficult to meet the diverse needs of medical protection, daily wear, outdoor activities, and other scenarios.

[0004] Based on the above statements, this application provides a method for preparing textile fabrics with high-efficiency antiviral properties, excellent breathability, and high washability, providing a new material solution for medical protection, public health, daily clothing and other fields. Summary of the Invention

[0005] In order to solve the technical problems mentioned in the background technology, the present application provides an antiviral breathable textile fabric and a preparation method thereof.

[0006] A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1: natural fibers and synthetic fibers are mixed and spun into 16-20 tex blended yarns through a ring spinning process; Step 2, immersing the blended yarn in a NaOH solution, adding mesoporous silica and a silane coupling agent, and after ultrasonic treatment, neutralizing with a 5-8% acetic acid solution to a pH of 7, washing with water 3-5 times, and drying at 50-70° C. to obtain a pretreated yarn; Step 3, immersing the pretreated yarn in the antiviral functional liquid, shaking in a constant temperature water bath at a temperature of 45-60°C for 20-30 minutes, pre-baking at 100-120°C for 5-15 minutes, and then baking at 130-140°C for 2-4 minutes to obtain the antiviral yarn; Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing liquid for 1-2 minutes, padding the fabric, pre-baking it at 80-100° C. for 5-8 minutes, and then baking it at 120-160° C. for 1-2 minutes to obtain an antiviral and breathable textile fabric.

[0007] Preferably, the natural fibers in step 1 are composed of cotton fibers and bamboo fibers in a mass ratio of 5-8:1-3.

[0008] Preferably, the synthetic fiber in step 1 is one or more of polyester fiber, polyurethane fiber and polylactic acid fiber.

[0009] Preferably, in step 1, the mass ratio of natural fiber to synthetic fiber is 10-12:3-5.

[0010] Preferably, in step 2, the mass ratio of the blended yarn, the NaOH solution, the mesoporous silica and the silane coupling agent is 30-50:80-100:0.3-0.5:0.5-1.

[0011] Preferably, the silane coupling agent is one or more of KH550, KH560, and KH-792.

[0012] Preferably, the concentration of the NaOH solution in step 2 is 5-8%.

[0013] Preferably, the preparation of the antiviral functional liquid in step 3 comprises the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide are dispersed in deionized water and ultrasonically treated, and then a composite fixative, polyethylene glycol and tea polyphenols are added in sequence. After mixing evenly, the pH is adjusted to 6.5-7.0, and ultrasonic dispersion is continued for 10-20 minutes to obtain an antiviral functional liquid.

[0014] Preferably, the polyethylene glycol is one of PEG2000 and PEG4000.

[0015] Preferably, the composite fixative is composed of polyethyleneimine and guar gum in a mass ratio of 10-15:2-4.

[0016] Preferably, the mass ratio of the chitosan quaternary ammonium salt, nano copper oxide, deionized water, composite fixative, polyethylene glycol and tea polyphenols is 20-30:5-8:8000-12000:10-20:15-25:2-5.

[0017] Preferably, the preparation method of the finishing liquid in step 4 is: Add nano-silica aerogel powder and sodium polyacrylate to deionized water, and after ultrasonic treatment, add water-based polyurethane and epoxysiloxane crosslinker. Stir continuously for 20-30 minutes at a temperature of 25-30°C and a stirring speed of 800-1000 rpm. High-pressure homogenization is performed at 80-100 MPa for 3-5 times to obtain a finishing liquid.

[0018] Preferably, the mass ratio of the nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane and epoxysiloxane crosslinking agent is 5-15:3-8:500-1000:20-40:2-10.

[0019] Preferably, the rolling rate of the padding treatment in step 4 is 70-80%.

[0020] Preferably, the epoxysiloxane crosslinking agent is KH-560.

[0021] An antiviral and breathable textile fabric is prepared by the above method.

[0022] In summary, this application has the following beneficial effects: The present application mixes natural fibers and synthetic fibers, combining the advantages of natural fibers such as good moisture absorption, good dyeability, comfortable wearing, no irritation in contact with the skin, antibacterial, antibacterial, breathable and cool properties with the high strength, high elastic modulus, wrinkle resistance and good shape retention of polyester fibers, so that the blended yarn is both comfortable and durable and can meet the needs of use in more scenarios. In addition, the natural fibers in the blended yarn have a porous structure and rich hydroxyl groups, which are conducive to the adsorption of components in the antiviral functional liquid; and the chemical stability of the synthetic fibers helps to maintain the stability of these functional components. The two work synergistically to improve the overall antiviral performance of the fabric. Natural fibers themselves have good air permeability. The addition of synthetic fibers can adjust the pore structure of the yarn, so that the fabric has better morphological stability while ensuring air permeability, avoiding the problem of decreased air permeability caused by the expansion of natural fibers after absorbing moisture.

[0023] This application immerses pretreated blended yarn in an antiviral functional liquid to impart antiviral properties to the yarn. The antiviral functional liquid contains ingredients such as chitosan quaternary ammonium salt, nano-copper oxide, and tea polyphenols, which possess antiviral activity. Chitosan quaternary ammonium salt carries a positive charge, which interacts with the negative charge on the surface of viruses, disrupting their structure. Nano-copper oxide has excellent antibacterial and antiviral properties, and tea polyphenols also have some antiviral activity. These ingredients work synergistically to impart excellent antiviral properties to the yarn. Furthermore, during the preparation of the antiviral functional liquid, chitosan quaternary ammonium salt and nano-copper oxide are first dispersed in deionized water and ultrasonically treated to uniformly disperse them in the water, forming a stable suspension. A composite fixative, polyethylene glycol, and tea polyphenols are then added sequentially, and ultrasonic dispersion is continued. This further ensures uniform mixing of the functional liquid components, allowing the antiviral properties to be evenly distributed throughout the yarn. Pre-drying at a relatively low temperature removes moisture from the yarn surface, allowing the components of the functional liquid to initially adhere to the yarn. Then, the temperature is increased and baked, which can cause the components in the functional liquid to chemically react with the fibers, forming a stronger bond and improving the durability of the antiviral performance.

[0024] This application incorporates nano-silica aerogel powder into the finishing liquid. This powder has a rich porous structure and can increase the breathability of the fabric. Furthermore, sodium polyacrylate can adjust the viscosity of the finishing liquid, allowing it to better penetrate the fabric and further improve its breathability. The addition of water-based polyurethane can increase the strength and wear resistance of the fabric, making it more durable. The epoxysiloxane crosslinker can form a crosslinked structure between the water-based polyurethane, nano-silica aerogel powder, and the fabric, strengthening their bonding and forming a stable structure. This further enhances the physical properties of the fabric and improves the durability of the finishing effect. DETAILED DESCRIPTION

[0025] The present application is further described in detail below with reference to the embodiments.

[0026] The mesoporous silica (particle size: 150 nm) used in the examples of the present invention and the comparative examples was purchased from Suzhou Beike Nano Technology Co., Ltd.; chitosan quaternary ammonium salt was purchased from Wuhan Jiyesheng Chemical Co., Ltd.; nano-copper oxide was purchased from Hebei Teng Bimetallic Materials Co., Ltd.; polyethyleneimine (model: XH1040XD2E5B) was purchased from Wuhan Shuer Biotechnology Co., Ltd.; guar gum was purchased from Jiangsu Xinlun Petrochemical Co., Ltd.; nano-silica aerogel powder was purchased from Senate (Guangdong) New Materials Technology Co., Ltd.; sodium polyacrylate (industrial grade) was purchased from Shandong Gushuo Biotechnology Co., Ltd.; and water-based polyurethane (model: AH-1704-1A) was purchased from Anhui Dawei Huatai New Materials Technology Co., Ltd.

[0027] Examples 1-3 provide an antiviral breathable textile fabric and a preparation method thereof.

[0028] Example 1 A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1: mixing natural fibers and synthetic fibers and spinning them into 16-tex blended yarn through a ring spinning process, wherein the natural fibers are composed of cotton fibers and bamboo fibers in a mass ratio of 5:1, and the synthetic fibers are polyester fibers, and the mass ratio of the natural fibers to the synthetic fibers is 10:3; Step 2, immersing the blended yarn in a 5% NaOH solution, adding mesoporous silica and silane coupling agent KH550, and ultrasonically treating for 20 minutes at an ultrasonic power of 200 W and an ultrasonic frequency of 40 Hz, neutralizing with a 5% acetic acid solution to pH = 7, washing with water three times, and drying at 50 ° C to obtain pretreated yarn, wherein the mass ratio of blended yarn, NaOH solution, mesoporous silica and silane coupling agent KH550 is 30:80:0.3:0.5; Step 3: Immerse the pretreated yarn in the antiviral functional liquid, shake in a constant temperature water bath at 45°C for 20 minutes, pre-bake at 100°C for 5 minutes, and then bake at 130°C for 2 minutes to obtain the antiviral yarn; The preparation of the antiviral functional liquid includes the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide were dispersed in deionized water and ultrasonically treated at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz for 20 minutes. Then, a composite fixative, polyethylene glycol, and tea polyphenols were added in sequence and mixed evenly. The pH was adjusted to 6.5, and ultrasonic dispersion was continued for 10 minutes to obtain an antiviral functional liquid. The composite fixative was composed of polyethyleneimine and guar gum in a mass ratio of 10:2. The mass ratio of chitosan quaternary ammonium salt, nano-copper oxide, deionized water, composite fixative, polyethylene glycol, and tea polyphenols was 20:5:8000:10:15:2, and the polyethylene glycol was PEG4000. Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing solution for 1 minute, padding the fabric, controlling the padding rate to 70%, pre-baking at 80°C for 5 minutes, and then baking at 120°C for 1 minute to obtain an antiviral and breathable textile fabric; Wherein, the preparation method of finishing liquid is: Nano-silica aerogel powder and sodium polyacrylate were added to deionized water, and ultrasonic treatment was carried out for 20 minutes at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz. Then, aqueous polyurethane and KH-560 were added. The mixture was stirred at a temperature of 25°C and a stirring speed of 800 rpm for 20 minutes. The mixture was high-pressure homogenized three times at 80 MPa to obtain a finishing liquid, wherein the mass ratio of nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane and KH-560 was 5:3:500:20:2.

[0029] Example 2 A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1: mixing natural fibers and synthetic fibers and spinning them into 18tex blended yarn through a ring spinning process, wherein the natural fibers are composed of cotton fibers and bamboo fibers in a mass ratio of 7:2, and the synthetic fibers are polyester fibers, and the mass ratio of the natural fibers to the synthetic fibers is 11:4; Step 2, immersing the blended yarn in a 7% NaOH solution, adding mesoporous silica and silane coupling agent KH550, and ultrasonically treating for 25 minutes at an ultrasonic power of 250 W and an ultrasonic frequency of 50 kHz, neutralizing with a 7% acetic acid solution to pH = 7, washing with water 4 times, and drying at 60 ° C to obtain pretreated yarn, wherein the mass ratio of blended yarn, NaOH solution, mesoporous silica and silane coupling agent KH550 is 40:90:0.4:0.8; Step 3: Immerse the pretreated yarn in the antiviral functional liquid, shake in a constant temperature water bath at 50°C for 25 minutes, pre-bake at 110°C for 10 minutes, and then bake at 135°C for 3 minutes to obtain the antiviral yarn; The preparation of the antiviral functional liquid includes the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide were dispersed in deionized water and ultrasonically treated at an ultrasonic power of 120 W and an ultrasonic frequency of 35 kHz for 30 minutes. Then, a composite fixative, polyethylene glycol, and tea polyphenols were added in sequence and mixed evenly. The pH was adjusted to 6.8, and ultrasonic dispersion was continued for 15 minutes to obtain an antiviral functional liquid. The composite fixative was composed of polyethyleneimine and guar gum in a mass ratio of 13:3. The mass ratios of chitosan quaternary ammonium salt, nano-copper oxide, deionized water, composite fixative, polyethylene glycol, and tea polyphenols were 25:7:1000:15:20:4, and the polyethylene glycol was PEG4000. Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing solution for 1.5 minutes, padding the fabric, controlling the padding rate to 75%, pre-baking at 90°C for 7 minutes, and then baking at 140°C for 1.5 minutes to obtain an antiviral and breathable textile fabric; The preparation method of the finishing liquid is as follows: Nano-silica aerogel powder and sodium polyacrylate were added to deionized water, and ultrasonic treatment was carried out for 30 minutes at an ultrasonic power of 120 W and an ultrasonic frequency of 35 kHz. Then, aqueous polyurethane and KH-560 were added. The mixture was stirred at a temperature of 28°C and a stirring speed of 900 rpm for 25 minutes. The mixture was subjected to high-pressure homogenization treatment for 4 times at 90 MPa to obtain a finishing liquid, wherein the mass ratio of nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane and KH-560 was 10:6:800:30:6.

[0030] Example 3 A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1: mixing natural fibers and synthetic fibers and spinning them into 20-tex blended yarn through a ring spinning process, wherein the natural fibers are composed of cotton fibers and bamboo fibers in a mass ratio of 8:3, and the synthetic fibers are polyester fibers, and the mass ratio of the natural fibers to the synthetic fibers is 12:5; Step 2, immersing the blended yarn in an 8% NaOH solution, adding mesoporous silica and silane coupling agent KH550, and ultrasonically treating the yarn for 30 minutes at an ultrasonic power of 300 W and an ultrasonic frequency of 60 kHz, neutralizing the yarn with an 8% acetic acid solution to a pH of 7, washing the yarn with water 5 times, and drying the yarn at 70°C to obtain a pretreated yarn, wherein the mass ratio of the blended yarn, NaOH solution, mesoporous silica, and silane coupling agent KH550 is 50:100:0.5:1; Step 3: Immerse the pretreated yarn in the antiviral functional liquid, shake in a constant temperature water bath at 60°C for 30 minutes, pre-bake at 120°C for 15 minutes, and then bake at 140°C for 4 minutes to obtain the antiviral yarn; The preparation of the antiviral functional liquid includes the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide were dispersed in deionized water and ultrasonically treated at an ultrasonic power of 150W and an ultrasonic frequency of 40KHz for 40 minutes. Then, a composite fixative, polyethylene glycol, and tea polyphenols were added in sequence and mixed evenly. The pH was adjusted to 7.0, and ultrasonic dispersion was continued for 20 minutes to obtain an antiviral functional liquid. The composite fixative was composed of polyethyleneimine and guar gum in a mass ratio of 15:4. The mass ratios of chitosan quaternary ammonium salt, nano-copper oxide, deionized water, composite fixative, polyethylene glycol, and tea polyphenols were 30:8:12000:20:25:5, and the polyethylene glycol was PEG4000. Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing solution for 2 minutes, padding the fabric, controlling the padding rate to 80%, pre-baking at 100° C. for 8 minutes, and then baking at 160° C. for 2 minutes to obtain an antiviral and breathable textile fabric; The preparation method of the finishing liquid is as follows: Nano-silica aerogel powder and sodium polyacrylate were added to deionized water, and ultrasonic treatment was carried out for 40 minutes at an ultrasonic power of 150 W and an ultrasonic frequency of 40 kHz. Then, water-based polyurethane and KH-560 were added. The mixture was stirred at a temperature of 30°C and a stirring speed of 1000 rpm for 30 minutes. The mixture was high-pressure homogenized for 5 times at 100 MPa to obtain a finishing liquid, wherein the mass ratio of nano-silica aerogel powder, sodium polyacrylate, deionized water, water-based polyurethane and KH-560 was 15:8:1000:40:10.

[0031] Comparative Example 1 A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1, mixing natural fibers and synthetic fibers, and spinning them into 16tex blended yarn through a ring spinning process, wherein the natural fibers are cotton fibers, the synthetic fibers are polyester fibers, and the mass ratio of the natural fibers to the synthetic fibers is 10:3; Step 2, immersing the blended yarn in a 5% NaOH solution, adding mesoporous silica and silane coupling agent KH550, and ultrasonically treating for 20 minutes at an ultrasonic power of 200 W and an ultrasonic frequency of 40 Hz, neutralizing with a 5% acetic acid solution to pH = 7, washing with water three times, and drying at 50 ° C to obtain pretreated yarn, wherein the mass ratio of blended yarn, NaOH solution, mesoporous silica and silane coupling agent KH550 is 30:80:0.3:0.5; Step 3: Immerse the pretreated yarn in the antiviral functional liquid, shake in a constant temperature water bath at 45°C for 20 minutes, pre-bake at 100°C for 5 minutes, and then bake at 130°C for 2 minutes to obtain the antiviral yarn; The preparation of the antiviral functional liquid includes the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide were dispersed in deionized water and ultrasonically treated at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz for 20 minutes. Then, a composite fixative, polyethylene glycol, and tea polyphenols were added in sequence and mixed evenly. The pH was adjusted to 6.5, and ultrasonic dispersion was continued for 10 minutes to obtain an antiviral functional liquid. The composite fixative was composed of polyethyleneimine and guar gum in a mass ratio of 10:2. The mass ratio of chitosan quaternary ammonium salt, nano-copper oxide, deionized water, composite fixative, polyethylene glycol, and tea polyphenols was 20:5:8000:10:15:2, and the polyethylene glycol was PEG4000. Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing solution for 1 minute, padding the fabric, controlling the padding rate to 70%, pre-baking at 80°C for 5 minutes, and then baking at 120°C for 1 minute to obtain an antiviral and breathable textile fabric; Wherein, the preparation method of finishing liquid is: Nano-silica aerogel powder and sodium polyacrylate were added to deionized water, and ultrasonic treatment was carried out for 20 minutes at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz. Then, aqueous polyurethane and KH-560 were added. The mixture was stirred at a temperature of 25°C and a stirring speed of 800 rpm for 20 minutes. The mixture was high-pressure homogenized three times at 80 MPa to obtain a finishing liquid, wherein the mass ratio of nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane and KH-560 was 5:3:500:20:2.

[0032] Comparative Example 2 A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1, mixing natural fibers and synthetic fibers, and spinning them into 16tex blended yarn through a ring spinning process, wherein the natural fibers are bamboo fibers, the synthetic fibers are polyester fibers, and the mass ratio of the natural fibers to the synthetic fibers is 10:3; Step 2, immersing the blended yarn in a 5% NaOH solution, adding mesoporous silica and silane coupling agent KH550, and ultrasonically treating for 20 minutes at an ultrasonic power of 200 W and an ultrasonic frequency of 40 Hz, neutralizing with a 5% acetic acid solution to pH = 7, washing with water three times, and drying at 50 ° C to obtain pretreated yarn, wherein the mass ratio of blended yarn, NaOH solution, mesoporous silica and silane coupling agent KH550 is 30:80:0.3:0.5; Step 3: Immerse the pretreated yarn in the antiviral functional liquid, shake in a constant temperature water bath at 45°C for 20 minutes, pre-bake at 100°C for 5 minutes, and then bake at 130°C for 2 minutes to obtain the antiviral yarn; The preparation of the antiviral functional liquid includes the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide were dispersed in deionized water and ultrasonically treated at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz for 20 minutes. Then, a composite fixative, polyethylene glycol, and tea polyphenols were added in sequence and mixed evenly. The pH was adjusted to 6.5, and ultrasonic dispersion was continued for 10 minutes to obtain an antiviral functional liquid. The composite fixative was composed of polyethyleneimine and guar gum in a mass ratio of 10:2. The mass ratio of chitosan quaternary ammonium salt, nano-copper oxide, deionized water, composite fixative, polyethylene glycol, and tea polyphenols was 20:5:8000:10:15:2, and the polyethylene glycol was PEG4000. Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing solution for 1 minute, padding the fabric, controlling the padding rate to 70%, pre-baking at 80°C for 5 minutes, and then baking at 120°C for 1 minute to obtain an antiviral and breathable textile fabric; Wherein, the preparation method of finishing liquid is: Nano-silica aerogel powder and sodium polyacrylate were added to deionized water, and ultrasonic treatment was carried out for 20 minutes at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz. Then, aqueous polyurethane and KH-560 were added. The mixture was stirred at a temperature of 25°C and a stirring speed of 800 rpm for 20 minutes. The mixture was high-pressure homogenized three times at 80 MPa to obtain a finishing liquid, wherein the mass ratio of nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane and KH-560 was 5:3:500:20:2.

[0033] Comparative Example 3 A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1: mixing natural fibers and synthetic fibers and spinning them into 16-tex blended yarn through a ring spinning process, wherein the natural fibers are composed of cotton fibers and bamboo fibers in a mass ratio of 5:1, and the synthetic fibers are polyester fibers, and the mass ratio of the natural fibers to the synthetic fibers is 10:3; Step 2, immersing the blended yarn in a 5% NaOH solution, adding mesoporous silica and silane coupling agent KH550, and ultrasonically treating for 20 minutes at an ultrasonic power of 200 W and an ultrasonic frequency of 40 Hz, neutralizing with a 5% acetic acid solution to pH = 7, washing with water three times, and drying at 50 ° C to obtain pretreated yarn, wherein the mass ratio of blended yarn, NaOH solution, mesoporous silica and silane coupling agent KH550 is 30:80:0.3:0.5; Step 3: Immerse the pretreated yarn in the antiviral functional liquid, shake in a constant temperature water bath at 45°C for 20 minutes, pre-bake at 100°C for 5 minutes, and then bake at 130°C for 2 minutes to obtain the antiviral yarn; The preparation of the antiviral functional liquid includes the following steps: First, chitosan quaternary ammonium salt was dispersed in deionized water and ultrasonically treated at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz for 20 minutes. Then, a composite fixative, polyethylene glycol, and tea polyphenols were added in sequence and mixed evenly. The pH was adjusted to 6.5, and ultrasonic dispersion was continued for 10 minutes to obtain an antiviral functional liquid. The composite fixative was composed of polyethyleneimine and guar gum in a mass ratio of 10:2. The mass ratio of chitosan quaternary ammonium salt, deionized water, composite fixative, polyethylene glycol, and tea polyphenols was 20:8000:10:15:7, and the polyethylene glycol was PEG4000. Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing solution for 1 minute, padding the fabric, controlling the padding rate to 70%, pre-baking at 80°C for 5 minutes, and then baking at 120°C for 1 minute to obtain an antiviral and breathable textile fabric; Wherein, the preparation method of finishing liquid is: Nano-silica aerogel powder and sodium polyacrylate were added to deionized water, and ultrasonic treatment was carried out for 20 minutes at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz. Then, aqueous polyurethane and KH-560 were added. The mixture was stirred at a temperature of 25°C and a stirring speed of 800 rpm for 20 minutes. The mixture was high-pressure homogenized three times at 80 MPa to obtain a finishing liquid, wherein the mass ratio of nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane and KH-560 was 5:3:500:20:2.

[0034] Comparative Example 4 A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1: mixing natural fibers and synthetic fibers and spinning them into 16-tex blended yarn through a ring spinning process, wherein the natural fibers are composed of cotton fibers and bamboo fibers in a mass ratio of 5:1, and the synthetic fibers are polyester fibers, and the mass ratio of the natural fibers to the synthetic fibers is 10:3; Step 2, immersing the blended yarn in a 5% NaOH solution, adding mesoporous silica and silane coupling agent KH550, and ultrasonically treating for 20 minutes at an ultrasonic power of 200 W and an ultrasonic frequency of 40 Hz, neutralizing with a 5% acetic acid solution to pH = 7, washing with water three times, and drying at 50 ° C to obtain pretreated yarn, wherein the mass ratio of blended yarn, NaOH solution, mesoporous silica and silane coupling agent KH550 is 30:80:0.3:0.5; Step 3: Immerse the pretreated yarn in the antiviral functional liquid, shake in a constant temperature water bath at 45°C for 20 minutes, pre-bake at 100°C for 5 minutes, and then bake at 130°C for 2 minutes to obtain the antiviral yarn; The preparation of the antiviral functional liquid includes the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide were dispersed in deionized water and ultrasonically treated at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz for 20 minutes. Then, a composite fixative and polyethylene glycol were added in sequence and mixed evenly. The pH was adjusted to 6.5, and ultrasonic dispersion was continued for 10 minutes to obtain an antiviral functional liquid. The composite fixative was composed of polyethyleneimine and guar gum in a mass ratio of 10:2. The mass ratio of chitosan quaternary ammonium salt, nano-copper oxide, deionized water, composite fixative and polyethylene glycol was 20:7:8000:10:15, and the polyethylene glycol was PEG4000. Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing solution for 1 minute, padding the fabric, controlling the padding rate to 70%, pre-baking at 80°C for 5 minutes, and then baking at 120°C for 1 minute to obtain an antiviral and breathable textile fabric; Wherein, the preparation method of finishing liquid is: Nano-silica aerogel powder and sodium polyacrylate were added to deionized water, and ultrasonic treatment was carried out for 20 minutes at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz. Then, aqueous polyurethane and KH-560 were added. The mixture was stirred at a temperature of 25°C and a stirring speed of 800 rpm for 20 minutes. The mixture was high-pressure homogenized three times at 80 MPa to obtain a finishing liquid, wherein the mass ratio of nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane and KH-560 was 5:3:500:20:2.

[0035] Comparative Example 5 A method for preparing an antiviral breathable textile fabric comprises the following steps: Step 1: mixing natural fibers and synthetic fibers and spinning them into 16-tex blended yarn through a ring spinning process, wherein the natural fibers are composed of cotton fibers and bamboo fibers in a mass ratio of 5:1, and the synthetic fibers are polyester fibers, and the mass ratio of the natural fibers to the synthetic fibers is 10:3; Step 2, immersing the blended yarn in a 5% NaOH solution, adding mesoporous silica and silane coupling agent KH550, and ultrasonically treating for 20 minutes at an ultrasonic power of 200 W and an ultrasonic frequency of 40 Hz, neutralizing with a 5% acetic acid solution to pH = 7, washing with water three times, and drying at 50 ° C to obtain pretreated yarn, wherein the mass ratio of blended yarn, NaOH solution, mesoporous silica and silane coupling agent KH550 is 30:80:0.3:0.5; Step 3: Immerse the pretreated yarn in the antiviral functional liquid, shake in a constant temperature water bath at 45°C for 20 minutes, pre-bake at 100°C for 5 minutes, and then bake at 130°C for 2 minutes to obtain the antiviral yarn; The preparation of the antiviral functional liquid includes the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide were dispersed in deionized water and ultrasonically treated at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz for 20 minutes. Then, a composite fixative, polyethylene glycol, and tea polyphenols were added in sequence and mixed evenly. The pH was adjusted to 6.5, and ultrasonic dispersion was continued for 10 minutes to obtain an antiviral functional liquid. The composite fixative was polyethyleneimine, and the mass ratio of chitosan quaternary ammonium salt, nano-copper oxide, deionized water, composite fixative, polyethylene glycol, and tea polyphenols was 20:5:8000:10:15:2. The polyethylene glycol was PEG4000. Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing solution for 1 minute, padding the fabric, controlling the padding rate to 70%, pre-baking at 80°C for 5 minutes, and then baking at 120°C for 1 minute to obtain an antiviral and breathable textile fabric; Wherein, the preparation method of finishing liquid is: Nano-silica aerogel powder and sodium polyacrylate were added to deionized water, and ultrasonic treatment was carried out for 20 minutes at an ultrasonic power of 100 W and an ultrasonic frequency of 30 kHz. Then, aqueous polyurethane and KH-560 were added. The mixture was stirred at a temperature of 25°C and a stirring speed of 800 rpm for 20 minutes. The mixture was high-pressure homogenized three times at 80 MPa to obtain a finishing liquid, wherein the mass ratio of nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane and KH-560 was 5:3:500:20:2.

[0036] Performance Testing The comprehensive properties of the antiviral breathable textile fabrics prepared in Examples 1-3 and Comparative Examples 1-5 of the present application are as follows: Antiviral performance: Determined in accordance with ISO 18184-2019 "Textiles — Determination of antiviral activity"; Air permeability: Take a 20cm x 20cm piece of fabric and place it in an environment with a temperature of 25°C and a relative humidity of 65% for 24 hours using a fully automatic air permeability tester. Then, refer to the national standard GB / T 5453-1997 "Determination of Air Permeability of Textile Fabrics" in the above environment and set the pressure difference to 100Pa. Washability test: Wash 20 times according to the national standard GB / T 8629-2017 "Textile testing - household washing and drying procedures" and measure the antiviral activity retention rate; Anti-pilling level: Tested in accordance with the national standard GB / T4802.2-2018 "Determination of pilling properties of textile fabrics - Part 2: Modified Martindale method", divided into levels 1-5. The higher the level, the better the anti-pilling performance. The specific test results are shown in Table 1 below.

[0037] Table 1 Performance parameters of the antiviral breathable textile fabrics in Examples 1-3 and Comparative Examples 1-5

[0038] As can be seen from Table 1, the antiviral and breathable textile fabric prepared in this application has a high air permeability. At the same time, the initial antiviral performance and the antiviral performance after washing are maintained at a high level. The fabric has excellent anti-pilling performance, good durability and aesthetics, and is suitable for a variety of high-end textile application scenarios.

[0039] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A method for preparing an antiviral breathable textile fabric, characterized in that: The method comprises the following preparation steps: Step 1: natural fibers and synthetic fibers are mixed and spun into 16-20 tex blended yarns through a ring spinning process; Step 2, immersing the blended yarn in a NaOH solution, adding mesoporous silica and a silane coupling agent, and after ultrasonic treatment, neutralizing with a 5-8% acetic acid solution to a pH of 7, washing with water 3-5 times, and drying at 50-70° C. to obtain a pretreated yarn; Step 3, immersing the pretreated yarn in the antiviral functional liquid, shaking in a constant temperature water bath at a temperature of 45-60°C for 20-30 minutes, pre-baking at 100-120°C for 5-15 minutes, and then baking at 130-140°C for 2-4 minutes to obtain the antiviral yarn; Step 4: Weaving the antiviral yarn using a plain weave process, soaking the woven fabric in a finishing liquid for 1-2 minutes, padding the fabric, pre-baking it at 80-100° C. for 5-8 minutes, and then baking it at 120-160° C. for 1-2 minutes to obtain an antiviral and breathable textile fabric.

2. The method for preparing the antiviral breathable textile fabric according to claim 1, characterized in that: In step 1, the natural fibers are composed of cotton fibers and bamboo fibers in a mass ratio of 5-8:1-3; the synthetic fibers are one or more of polyester fibers, polyurethane fibers and polylactic acid fibers; and the mass ratio of the natural fibers to the synthetic fibers is 10-12:3-5.

3. The method for preparing the antiviral breathable textile fabric according to claim 1, characterized in that: In step 2, the mass ratio of the blended yarn, the NaOH solution, the mesoporous silica and the silane coupling agent is 30-50:80-100:0.3-0.5:0.5-1; and the concentration of the NaOH solution is 5-8%.

4. The method for preparing the antiviral breathable textile fabric according to claim 1, characterized in that: The preparation of the antiviral functional liquid in step 3 comprises the following steps: First, chitosan quaternary ammonium salt and nano-copper oxide are dispersed in deionized water and ultrasonically treated, and then a composite fixative, polyethylene glycol and tea polyphenols are added in sequence. After mixing evenly, the pH is adjusted to 6.5-7.0, and ultrasonic dispersion is continued for 10-20 minutes to obtain an antiviral functional liquid.

5. The method for preparing the antiviral breathable textile fabric according to claim 4, characterized in that: The composite fixing agent consists of polyethyleneimine and guar gum in a mass ratio of 10-15:2-4.

6. The method for preparing the antiviral breathable textile fabric according to claim 4, characterized in that: The mass ratio of the chitosan quaternary ammonium salt, nano copper oxide, deionized water, composite fixative, polyethylene glycol and tea polyphenol is 20-30:5-8:8000-12000:10-20:15-25:2-5.

7. The method for preparing the antiviral breathable textile fabric according to claim 1, characterized in that: The preparation method of the finishing liquid in step 4 is: Add nano-silica aerogel powder and sodium polyacrylate to deionized water, and after ultrasonic treatment, add water-based polyurethane and epoxysiloxane crosslinker. Stir continuously for 20-30 minutes at a temperature of 25-30°C and a stirring speed of 800-1000 rpm. High-pressure homogenization is performed at 80-100 MPa for 3-5 times to obtain a finishing liquid.

8. The method for preparing an antiviral breathable textile fabric according to claim 7, wherein the mass ratio of the nano-silica aerogel powder, sodium polyacrylate, deionized water, aqueous polyurethane, and epoxysiloxane crosslinker is 5-15:3-8:500-1000:20-40:2-10.

9. The method for preparing an antiviral breathable textile fabric according to claim 1, wherein the padding rate in step 4 is 70-80%.

10. An antiviral and breathable textile fabric prepared by the preparation method according to claims 1-9.

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