An antibacterial fabric made with a co-monomer containing an amide and a method of making the same

Abstract

The application discloses an antibacterial fabric made of a copolymer containing an amide and a preparation method of the antibacterial fabric, and the preparation method comprises the following steps: A, sequentially adding deionized water, diallylamine and a second monomer to prepare an impregnation solution, the addition amount of the diallylamine is 30.0-60.0% of the mass fraction of the copolymer, and the second monomer is one of N, N-diethyl acrylamide or N, N-dimethyl acrylamide or a mixture of the two; B, impregnation finishing; C, drying; D, irradiation; E, extraction; and F, halogenation. The raw materials are cheap and easy to obtain, and the production cost is low. The halamine compound is coated on the surface of the textile fiber by the radiation method, and then the textile is prepared, so that the antibacterial textile is obtained, the antibacterial purpose of bacteriostasis and sterilization is achieved, the antibacterial agent does not cause secondary pollution to the environment, and the safe and environment-friendly antibacterial purpose can be achieved.

Description

Technical Field

[0001] This invention belongs to the field of antibacterial materials technology, and particularly relates to a method for preparing a textile fabric with antibacterial function. Background Technology

[0002] The effective inhibition and eventual elimination of harmful bacteria has garnered increasing attention from scholars. Textiles, as the primary protective material for isolating the human body from the external environment, possess a rich, porous structure and a large specific surface area, making them highly susceptible to absorbing large amounts of oils and sweat secreted during human metabolism. This provides a breeding ground for microorganisms to attach, multiply, and proliferate. The proliferation of harmful bacteria on textile surfaces not only produces odors but can also indirectly spread diseases in public places such as hospitals, hotels, and bathrooms, posing a threat to human health. Therefore, the development of functional textiles, especially functional antibacterial textiles, is urgently needed.

[0003] Functional antibacterial textiles are a new type of textile material that can effectively inhibit or kill microorganisms such as bacteria and fungi, and has health care functions. They can not only effectively prevent the spread and infection of diseases, but also greatly reduce the risk of cross-infection in public environments. Currently, there are many types of antibacterial textiles, mainly divided into two categories according to their preparation methods: blending spinning and finishing processing. Blending spinning involves uniformly mixing antibacterial granular materials with the spinning matrix material, then spinning the blended materials to produce textiles. However, the antibacterial granular materials are expensive and have relatively large particle sizes, making dispersion difficult. During spinning, the particles easily clog the spinneret orifices and break fibers, causing numerous malfunctions that directly affect normal production operations. This method is only suitable for chemical spinning and cannot process native plant fibers such as cotton, hemp, and silk. The other type involves using antibacterial agents to finish the fabric. Finishing processes involve treating the fabric with antibacterial finishing agents to impart antibacterial properties. This processing method is mature and simple, with flexible varieties and processes, but its durability is relatively poor.

[0004] Therefore, developing a durable antimicrobial finishing method is of great significance. Summary of the Invention

[0005] In view of the shortcomings of existing antibacterial functional textiles and their preparation methods, the purpose of this invention is to provide a method for preparing antibacterial functional textiles containing novel halogen amine antibacterial agents.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A method for preparing an antibacterial fabric made from an amide-containing comonomer, comprising the following steps: A. Preparing an impregnation solution:

[0008] In a reactor, deionized water, diallylamine, and a second monomer are added sequentially, stirred and mixed, and the amount of water is adjusted to prepare a solution with a comonomer mass concentration of 5.0-10.0%. After stirring and mixing evenly, an impregnation solution is obtained. The amount of diallylamine added is 30.0-60.0% of the comonomer mass fraction. The second monomer is one or a mixture of N,N-diethylacrylamide or N,N-dimethylacrylamide.

[0009] B. Impregnation finishing:

[0010] Next, the above impregnation solution is used to impregnate the textile fabric with a padding device to obtain impregnated fabric. The padding rate is 20-120%, and the concentration of the impregnation solution is prepared according to 0.01-3.0% of the oven-dry mass of the comonomer absorbed by the textile fabric.

[0011] C. Drying:

[0012] The above-mentioned impregnated fabric is dried to remove water, resulting in a dried fabric.

[0013] D. Irradiation:

[0014] The dried fabric that has undergone the above drying treatment is irradiated in a modified atmosphere to obtain irradiated fabric.

[0015] E. Extraction:

[0016] The irradiated fabric and the entrainer were placed together in the extraction vessel of a supercritical extraction device. The unreacted monomers were dissolved by extraction with CO2 under supercritical conditions and separated in a separation vessel to remove the unreacted residual monomers to obtain the extracted fabric. The entrainer is a solvent with good compatibility with the residual monomers, selected from one or a mixture of two of ethanol and methanol, preferably ethanol. The amount of the entrainer is 5.0 to 40.0% of the mass fraction of CO2.

[0017] F. Halogenation:

[0018] The extracted fabric, after extraction treatment, was immersed in a hypohalite aqueous solution with a pH of 6.5–7.5 and a mass percentage concentration of 0.1–10.0%. After halogenation at room temperature for 30–80 minutes, it was removed, dehydrated, and dried at 40–50°C until dry, resulting in a fabric with antibacterial function coated with an N-halodiallylamine copolymer containing the structure shown in general formula (I).

[0019]

[0020] In formula (I), X represents a halogen atom, chlorine or bromine, preferably a chlorine atom; n represents the degree of polymerization.

[0021] Alternatively, the second monomer may further comprise methylenebisacrylamide, the amount of which is 0.01 to 30.0% of the mass fraction of the comonomer, preferably 3.0% to 20.0%, more preferably 3.0% to 10.0%.

[0022] As a preferred embodiment, when preparing the impregnation solution in step A, the amount of diallylamine added is 45% to 55% of the mass fraction of the comonomer.

[0023] Specifically, the immersion rolling equipment in step B is either a continuous immersion rolling mill or an intermittent immersion stripping equipment. The immersion stripping equipment includes an immersion tank for immersion and a descaling machine for descaling.

[0024] Specifically, the drying and dehydration in step C is carried out at a temperature of 60–120°C, preferably 60–80°C, in a drying oven to remove water. The drying oven is a heating device that can provide heat, including ovens, drum dryers, tunnel furnaces, etc., and is selected from one or more of these heating devices in combination, preferably a tunnel furnace.

[0025] Specifically, in step D, the modified atmosphere treatment involves replacing the air in the process environment with nitrogen or carbon dioxide, or a mixture thereof, at a certain pressure, or by evacuating the process environment. A certain pressure refers to a relative gas pressure greater than 0.0 MPa, preferably 0.01 to 0.15 MPa. The nitrogen is industrial nitrogen, pure nitrogen, high-purity nitrogen, or a mixture thereof, preferably industrial nitrogen. The carbon dioxide is industrial carbon dioxide, food-grade carbon dioxide, high-purity carbon dioxide, or a mixture thereof, preferably industrial carbon dioxide. Evacuating the process environment refers to creating a certain degree of vacuum in the process environment. This certain degree of vacuum refers to a relative gas pressure in the process environment less than 0.0 MPa, preferably -0.05 to -0.10 MPa, more preferably -0.05 to -0.08 MPa.

[0026] The irradiation treatment refers to irradiating the dried fabric with an electron beam accelerator at a dose of 10-150 kGy, preferably 20-60 kGy.

[0027] Specifically, the electron beam accelerator is a high-energy electron beam accelerator, including a high-voltage accelerator, an induction accelerator, and a resonant accelerator.

[0028] Specifically, the supercritical extraction device described in step E is a device that uses supercritical fluid extraction technology to perform extraction operations, thereby extracting and separating residual unpolymerized monomers from irradiated solid fibers. The main equipment in the process consists of a high-pressure extraction vessel, a separation vessel, a heat exchanger, a high-pressure pump (compressor), a storage tank, and pipes, valves, and joints connecting these devices. The extraction time is 0.5 to 1.0 hours.

[0029] Specifically, the hypohalite in step F includes sodium hypochlorite, potassium hypochlorite, calcium hypochlorite, sodium hypobromite, potassium hypobromite, calcium hypobromite, etc., with sodium hypochlorite and calcium hypochlorite being preferred.

[0030] As a preferred embodiment, without compromising the effectiveness of the present invention, in order to ensure the smooth progress of the halogenation reaction, an interfacial compatibilizer may be added to the hypohalite aqueous solution in the F halogenation step, wherein the amount added is 0.5-10% of the mass percentage of the hypohalite aqueous solution, preferably 1-5%.

[0031] The interface compatibilizer refers to the physical and chemical compatibility between a solid and a liquid phase when they come into contact to form an interface. It includes methanol, ethanol, propanol, isopropanol, butanol, phenol, ethyl acetate, tetrahydrofuran, methyl ethyl ketone, etc., selected from one or a mixture of two or more of them, with ethanol and propanol being preferred.

[0032] Another object of the present invention is to provide a textile fabric obtained by any of the methods described above. The textile fabric is a fibrous fabric woven from textile fibers into a cloth or finished product. Specifically, the cloth refers to fabric used for making clothing.

[0033] Specifically, the finished products include face shields, masks, wound dressings, gauze bandages, surgical scrubs, isolation gowns, protective suits, surgical gowns, surgical drapes, caps, surgical boots, work clothes, clothing, underwear, socks, dental sponges, surgical sponges, incontinence products, diapers, towels, bedding, sheets, mattresses, sofa covers, tablecloths, dry wiping materials, wet wiping materials, air filters, duvet covers, sportswear, gloves, cushions, rags, underwear, down jackets, cotton-padded coats, and other manufactured products.

[0034] In the preparation method of the antibacterial textile of this invention, the precursor of the antibacterial agent is the diallylamine structural unit in the copolymer. However, because diallylamine polymerization involves both free radical chain growth and free radical chain transfer reactions, it cannot form a long-chain polymer with a large molecular weight. To obtain a polymer with a higher molecular weight, copolymerization with other monomers is usually used to reduce the occurrence of chain transfer reactions. To obtain a copolymer in which the main component is the diallylamine structural unit, this invention adopts a method of adding a second monomer to copolymerize with diallylamine. Considering the balance of hydrophilicity and hydrophobicity of the copolymer, an amide-based unsaturated monomer is preferably used as the second monomer, which achieves a more optimized engineering purpose.

[0035] High-energy radiation is a uniform, efficient, and easily controllable initiation method. High-energy rays can be used for grafting onto the surface of solid organic materials and for the polymerization and curing of monomers. Compared with other chemical methods, it has a significant competitive advantage in terms of cost. Therefore, in this invention, high-energy radiation was chosen as the polymerization method for N-halodiallylamine. Since the high-energy electron beam generated by an electron accelerator has a high irradiation intensity, an electron beam accelerator is preferred as the radiation source for the radiation generator.

[0036] The irradiated fabric is then extracted with supercritical CO2 fluid to remove unreacted residual monomers, making it safer and more hygienic to use.

[0037] The raw materials selected in this invention are inexpensive and readily available, resulting in low production costs. By using an irradiation method, halogenated amine compounds are coated onto the surface of textile fibers, which are then used to prepare textiles with antibacterial functions. The textile fibers serve as both textiles and carriers for antibacterial compounds with antibacterial and sterilizing properties. When people use the textiles to achieve antibacterial purposes such as antibacterial and sterilizing, the antibacterial agents will not be released into the environment in the form of small molecules, thus avoiding secondary pollution. This achieves a safe and environmentally friendly antibacterial effect.

[0038] The antibacterial textile fabrics using this invention include fabrics and textiles, including hats, work clothes, clothing, underwear, socks, incontinence products, diapers, towels, bedding, sheets, mattresses, sofa covers, tablecloths, dry wipes, wet wipes, duvet covers, sportswear, gloves, cushions, rags, underwear, down jackets, cotton-padded jackets, and other finished products. Detailed Implementation

[0039] The present invention will be further illustrated by the following embodiments, but the embodiments do not limit the scope of the present invention.

[0040] Example 1

[0041] This example illustrates a method for preparing an antibacterial fabric, which includes the following steps:

[0042] A. Preparation of impregnation solution:

[0043] 1.0m equipped with a stirring device 3 In the mixer, add 200 kg of deionized water, 10 kg of diallylamine, 0.5 kg of N,N-diethylacrylamide, 8.0 kg of N,N-dimethylacrylamide, and 1.5 kg of methylenebisacrylamide in sequence. Stir for 5 to 10 minutes to mix evenly, and finally adjust the amount of deionized water to prepare an impregnation solution with a comonomer mass concentration of 8.5%.

[0044] B. Impregnation finishing:

[0045] The woven polyester woven fabric was pre-soaked in deionized water and then placed in a dehydrator to remove the liquid. The residual rate was measured to be 32%. Based on the absorption of 0.78% of the oven-dry mass of the comonomer, the concentration of the impregnation solution should be adjusted to 2.43%.

[0046] Add the above impregnation solution to the impregnation tank and add deionized water to adjust the concentration of the impregnation solution comonomer to 2.43%. Then put the polyester woven fabric into the impregnation tank and let it soak in the impregnation solution for 3 to 5 minutes. Then transfer it into the dehydrator to remove the impregnation solution to obtain the impregnated polyester woven fabric.

[0047] C. Drying:

[0048] Next, the impregnated polyester woven fabric that has undergone the above impregnation treatment is placed in a drying room at 60-65°C to dry and remove water to obtain dried polyester woven fabric.

[0049] D. Irradiation:

[0050] Then, the dried polyester woven fabric was placed into a 40cm*40cm pressure-resistant plastic bag with sealing function, vacuumed, and vacuumed again three times with 0.015MPa industrial nitrogen gas. After sealing, it was flattened and placed on the conveyor belt of a 5Mev high-energy electron beam accelerator irradiation device. It was then irradiated with a dose of 48kGy to obtain irradiated polyester woven fabric.

[0051] E. Extraction:

[0052] Then, the irradiated polyester woven fabric treated with the above irradiation is filled to a depth of 0.5m. 3 Add 25 kg of ethanol to the extraction vessel, then seal and fill with liquid CO2. Adjust the process to extract under supercritical conditions of 45℃ and 8.0 MPa to dissolve unreacted monomers. After extraction for 45 minutes, depressurize, separate and remove unreacted residual monomers to obtain extracted polyester woven fabric.

[0053] F. Halogenation:

[0054] After adjusting the pH of the calcium hypochlorite aqueous solution to 6.8–7.5 with dilute hydrochloric acid, adjust the mass percentage concentration of calcium hypochlorite to 1.5% with water, and then add ethanol and mix thoroughly to obtain a halogenated solution. The amount of ethanol added is 1.0% of the mass of the calcium hypochlorite aqueous solution.

[0055] Finally, the extracted polyester woven fabric that has undergone the above extraction treatment is immersed in the above halogenation solution, and after halogenation reaction at room temperature for 60 minutes, it is taken out, dehydrated, and dried at 45-50°C until it is dried to obtain an antibacterial polyester woven fabric. The surface of this material is coated with an antibacterial fabric containing an N-halodiallylamine copolymer with the structure shown in general formula (I).

[0056]

[0057] In formula (I), X represents a halogen atom, chlorine or bromine, preferably a chlorine atom; n represents the degree of polymerization.

[0058] The polyester woven fabric in this example can be made into bedding with antibacterial properties, medical clothing, and uniforms for service staff in trains, hotels, restaurants, etc.

[0059] Example 2

[0060] This example illustrates a method for preparing an antibacterial fabric, which includes the following steps:

[0061] A. Preparation of impregnation solution:

[0062] 1.0m equipped with a stirring device 3 In the mixer, add 200 kg of deionized water, 9.5 kg of diallylamine, 8.5 kg of N,N-diethylacrylamide, and 2.0 kg of methylenebisacrylamide in sequence. Stir for 5-10 minutes to mix evenly, and finally adjust the amount of deionized water to prepare an impregnation solution with a comonomer mass concentration of 8.0%. B. Impregnation finishing:

[0063] Oxford cloth was pre-soaked in deionized water and then placed in a dehydrator to remove the liquid. The residual rate was measured to be 53%. Based on the absorption of 1.2% of the oven-dry mass of the comonomer, the concentration of the impregnation solution should be adjusted to 2.26%.

[0064] Add the above impregnation solution to the impregnation tank and add deionized water to adjust the concentration of the impregnation solution comonomer to 2.26%. Then put the Oxford cloth into the impregnation tank and let it soak in the impregnation solution for 3 to 6 minutes. Then transfer it into the dehydrator to remove the impregnation solution to obtain the impregnated Oxford cloth.

[0065] C. Drying:

[0066] Then, the impregnated Oxford cloth that has been treated is dried in a drying room at 65-70°C to remove water and obtain dried Oxford cloth.

[0067] D. Irradiation:

[0068] Next, the dried Oxford cloth was packaged into 40cm*45cm pressure-resistant plastic bags with sealing function, vacuumed, and then vacuumed three times with 0.018MPa industrial nitrogen gas before sealing. After being flattened, it was placed on the conveyor belt of a 5Mev high-energy electron beam accelerator irradiation device and irradiated with a dose of 52kGy to obtain irradiated Oxford cloth.

[0069] E. Extraction:

[0070] Then, the irradiated Oxford cloth treated with the above irradiation is filled to a depth of 0.5M. 3Add 28 kg of ethanol to the extraction vessel, then seal and fill with liquid CO2. Adjust the process to extract under supercritical conditions of 40℃ and 7.8 MPa to dissolve unreacted monomers. After extraction for 55 minutes, depressurize, separate and remove unreacted residual monomers to obtain extracted Oxford cloth.

[0071] F. Halogenation:

[0072] After adjusting the pH of the sodium hypochlorite aqueous solution to 7.0-7.5 with sulfuric acid, the mass percentage concentration of sodium hypochlorite is adjusted to 2.0% with water, and then ethanol is added and mixed evenly to obtain a halogenated solution. The amount of ethanol added is 1.2% of the mass of the sodium hypochlorite aqueous solution.

[0073] Finally, the extracted Oxford cloth that has undergone the above extraction treatment is immersed in the above halogenation solution and halogenated at room temperature for 60 minutes. After that, it is taken out, dehydrated and dried at 45-50°C until it is dried to obtain Oxford cloth with antibacterial function. The surface of the material is coated with an antibacterial cloth containing an N-halodiallylamine copolymer with the structure shown in general formula (I).

[0074]

[0075] In formula (I), X represents a halogen atom, chlorine or bromine, preferably a chlorine atom; n represents the degree of polymerization.

[0076] In this example, Oxford cloth can be used to make antibacterial sheets, mattresses, sofa covers, shirts, sportswear, and pajamas.

[0077] Example 3

[0078] This example illustrates a method for preparing an antibacterial fabric, which includes the following steps:

[0079] A. Preparation of impregnation solution:

[0080] 1.0m equipped with a stirring device 3 In the mixer, add 200 kg of deionized water, 10.5 kg of diallylamine, 1.5 kg of N,N-diethylacrylamide, 6.2 kg of N,N-dimethylacrylamide, and 1.8 kg of methylenebisacrylamide in sequence. Stir for 5 to 10 minutes to mix evenly, and finally adjust the amount of deionized water to prepare an impregnation solution with a comonomer mass concentration of 8.0%.

[0081] B. Impregnation finishing:

[0082] The linen was pre-soaked in deionized water and then placed in a dehydrator to remove the liquid. The residual rate was measured to be 58%. Based on the absorption of 1.25% of the oven-dry mass of the comonomer, the concentration of the impregnation solution should be adjusted to 1.23%.

[0083] Add the above impregnation solution to the impregnation tank and add deionized water to adjust the concentration of the impregnation solution comonomer to 1.23%. Then put the linen into the impregnation tank and let it soak in the impregnation solution for 3 to 6 minutes. Then transfer it into the dehydrator to remove the impregnation solution to obtain the impregnated linen.

[0084] C. Drying:

[0085] Next, the impregnated linen fabric that has been treated is placed in a drying room at 45-50°C to dry and remove water, thus obtaining dried linen fabric.

[0086] D. Irradiation:

[0087] Next, the dried linen fabric was packaged into 45cm*45cm pressure-resistant plastic bags with sealing function, vacuumed, and then vacuumed three times with 0.016MPa industrial nitrogen gas before sealing. After being flattened, it was placed on the conveyor belt of a 5Mev high-energy electron beam accelerator irradiation device and irradiated with a dose of 50kGy to obtain irradiated linen fabric.

[0088] E. Extraction:

[0089] Then, fill a 0.5M ventilator with the irradiated linen fabric that has undergone the above irradiation treatment. 3 Add 30 kg of ethanol to the extraction vessel, then seal and fill with liquid CO2. Adjust the process to extract under supercritical conditions of 42℃ and 7.6 MPa to dissolve unreacted monomers. After extraction for 50 minutes, depressurize, separate and remove unreacted residual monomers to obtain extracted linen.

[0090] F. Halogenation:

[0091] After adjusting the pH of the sodium hypochlorite aqueous solution to 6.7–7.2 with dilute hydrochloric acid, adjust the mass percentage concentration of sodium hypochlorite to 2.5% with water, and then add ethanol and mix thoroughly to obtain a halogenated solution. The amount of ethanol added is 1.5% of the mass of the sodium hypochlorite aqueous solution.

[0092] Finally, the extracted linen fabric that has undergone the above extraction treatment is immersed in the above halogenation solution and subjected to halogenation reaction at room temperature for 60 minutes. After being removed and dehydrated, it is dried at 45-50°C to obtain linen fabric with antibacterial function. The surface of this material is coated with an antibacterial fabric containing an N-halodiallylamine copolymer with the structure shown in general formula (I).

[0093]

[0094] In formula (I), X represents a halogen atom, chlorine or bromine, preferably a chlorine atom; n represents the degree of polymerization.

[0095] The antibacterial linen fabric made from linen in this example can be used to make police uniforms, combat uniforms, work clothes, sofa covers, tablecloths, etc. with antibacterial functions.

[0096] Example 4

[0097] This example illustrates a method for preparing an antibacterial fabric, which includes the following steps:

[0098] A. Preparation of impregnation solution:

[0099] Equipped with a 1.0M stirring device 3 In the mixer, add 200 kg of deionized water, 9 kg of diallylamine, 10.0 kg of N,N-diethylacrylamide, and 1.0 kg of methylenebisacrylamide in sequence. Stir for 5-10 minutes to mix evenly, and finally adjust the amount of deionized water to prepare an impregnation solution with a comonomer mass concentration of 8.5%. B. Impregnation finishing:

[0100] The vinylon-cotton blend fabric was pre-soaked in deionized water and then placed in a dehydrator to remove the liquid. The residual rate was measured to be 48%. Based on the absorption of 1.15% of the oven-dry mass of the comonomer, the concentration of the impregnation solution should be adjusted to 2.4%.

[0101] Add the above impregnation solution to the impregnation tank and add deionized water to adjust the concentration of the impregnation solution comonomer to 2.4%. Then put the cotton fabric into the impregnation tank and let it soak in the impregnation solution for 3 to 5 minutes. Then transfer it into the dehydrator to remove the impregnation solution to obtain the impregnated cotton fabric.

[0102] C. Drying:

[0103] Next, the impregnated cotton fabric that has been treated by impregnation is placed in a drying room at 45-48°C to dry and remove water, thus obtaining a dried cotton fabric.

[0104] D. Irradiation:

[0105] Next, the dried cotton fabrics were packaged into 42cm*42cm pressure-resistant plastic bags with sealing function, vacuumed, and then vacuumed three times with 0.016MPa industrial nitrogen gas before sealing. After being flattened, the bags were placed on the conveyor belt of a 5Mev high-energy electron beam accelerator irradiation device and irradiated with a dose of 35kGy to obtain irradiated cotton fabrics.

[0106] E. Extraction:

[0107] Then, the irradiated cotton fabric treated with the above irradiation was filled into a 0.5M pore. 3Add 25 kg of ethanol to the extraction vessel, then seal and fill with liquid CO2. Adjust the process to extract under supercritical conditions of 45℃ and 7.7 MPa to dissolve unreacted monomers. After extraction for 45 minutes, depressurize, separate and remove unreacted residual monomers to obtain extracted cotton fabric.

[0108] F. Halogenation:

[0109] After adjusting the pH of the calcium hypochlorite aqueous solution to 6.8–7.5 with dilute hydrochloric acid, adjust the mass percentage concentration of calcium hypochlorite to 1.75% with water, and then add ethanol and mix thoroughly to obtain a halogenated solution. The amount of ethanol added is 1.25% of the mass of the calcium hypochlorite aqueous solution.

[0110] Finally, the extracted cotton fabric that has undergone the above extraction treatment is immersed in the above halogenation solution and subjected to halogenation reaction at room temperature for 65 minutes. After being removed and dehydrated, it is dried at 45-50°C to obtain a cotton fabric with antibacterial function. The surface of this material is coated with an antibacterial fabric containing an N-halodiallylamine copolymer with the structure shown in general formula (I).

[0111]

[0112] In formula (I), X represents a halogen atom, chlorine or bromine, preferably a chlorine atom; n represents the degree of polymerization.

[0113] In this example, the antibacterial viscose fabric made from viscose-cotton fabric can be used to make underwear, pajamas, etc. with antibacterial functions.

[0114] Example 5

[0115] This example describes a method for preparing an antibacterial textile product. The difference from Example 1 is that ordinary socks are used instead of polyester woven fabric, but the other process conditions and steps are the same.

[0116] In this example, ordinary socks are used to make socks with antibacterial properties.

[0117] Example 6

[0118] This example describes a method for preparing antibacterial textiles. The difference from Example 2 is that ordinary underwear is used instead of Oxford cloth, but the other process conditions and steps are the same.

[0119] In this example, ordinary underwear is made into underwear with antibacterial function.

[0120] Example 7

[0121] This example is a method for preparing antibacterial textiles. The difference from Example 3 is that ordinary towels are used instead of linen, but the other process conditions and steps are the same.

[0122] In this example, an antibacterial towel is made from an ordinary towel.

[0123] Example 8

[0124] This example is a method for preparing antibacterial textiles. The difference from Example 4 is that ordinary gloves are used instead of linen, but the other process conditions and steps are the same.

[0125] In this example, ordinary gloves are made into gloves with antibacterial properties.

Claims

1. A method for preparing an antibacterial fabric made from a comonomer containing amide, characterized in that... Includes the following steps: A. Preparation of impregnation solution: In a reactor, deionized water, diallylamine, and a second monomer are added sequentially, stirred and mixed, and the amount of water is adjusted to prepare a solution with a comonomer mass concentration of 5.0-10.0%. After stirring and mixing evenly, an impregnation solution is obtained. The amount of diallylamine added is 30.0-60.0% of the comonomer mass fraction. The second monomer is one or a mixture of N,N-diethylacrylamide or N,N-dimethylacrylamide. B. Impregnation finishing: Next, the above impregnation solution is used to impregnate the textile fabric with a padding device to obtain impregnated fabric. The padding rate is 20-120%, and the concentration of the impregnation solution is prepared according to 0.01-3.0% of the oven-dry mass of the comonomer absorbed by the textile fabric. C. Drying: The above-mentioned impregnated fabric is dried to remove water, resulting in a dried fabric. D. Irradiation: The dried fabric that has undergone the above drying treatment is irradiated in a modified atmosphere to obtain irradiated fabric. E. Extraction: The irradiated fabric and the entrainer were placed together in the extraction vessel of a supercritical extraction device. The unreacted monomers were dissolved by extraction with CO2 under supercritical conditions and separated in a separation vessel to remove the unreacted residual monomers to obtain the extracted fabric. The entrainer is a solvent with good compatibility with the residual monomers and is selected from one or a mixture of two of ethanol and methanol. The amount of the entrainer is 5.0 to 40.0% of the mass fraction of CO2. F. Halogenation: The extracted fabric, after extraction treatment, was immersed in a hypohalite aqueous solution with a pH of 6.5–7.5 and a mass percentage concentration of 0.1–10.0%. After halogenation at room temperature for 30–80 minutes, it was removed, dehydrated, and dried at 40–50°C until dry, resulting in a fabric with antibacterial function coated with an N-halodiallylamine copolymer containing the structure shown in general formula (I). In formula (I), X represents a halogen atom, either chlorine or bromine; n represents the degree of polymerization.

2. The preparation method according to claim 1, characterized in that: The second monomer also contains methylenebisacrylamide.

3. The preparation method according to claim 1 or 2, characterized in that: In step A, when preparing the impregnation solution, the amount of diallylamine added is 45% to 55% of the mass fraction of the comonomer.

4. The preparation method according to claim 1, characterized in that: The irradiation treatment refers to irradiating the dried fabric with an electron beam accelerator at a dose of 10 to 150 kGy.

5. The preparation method according to claim 4, characterized in that: The electron beam accelerator is a high-energy electron beam accelerator, including a high-voltage accelerator, an induction accelerator, and a resonant accelerator.

6. The preparation method according to claim 1, characterized in that: The entrainer mentioned in step E is ethanol.

7. The preparation method according to claim 1, characterized in that: The halogen atom in formula (I) is a chlorine atom.

8. An antibacterial fabric prepared by the method according to any one of claims 1 to 7.

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