A method for preparing an electron beam grafted antibacterial cotton textile

Abstract

The application discloses a preparation method of electron beam grafting antibacterial cotton fabric, which comprises the following steps: putting the fabric into an antibacterial working solution, taking out and rolling after immersion, sealing and electron beam irradiation grafting, etc. The antibacterial agent containing unsaturated double bond groups is used to finish the fabric, and electron beam radiation is used to promote the grafting polymerization. The high-energy electron beam generated by the electron accelerator can ionize, excite and generate free radicals, cause intermolecular crosslinking and degradation. The antibacterial agent containing unsaturated double bond groups has strong double bond activity, and the electron beam can easily initiate the chemical reaction between the double bond and the hydroxyl group of cellulose, so that the fabric has antibacterial effect. The prepared antibacterial fabric has excellent antibacterial performance. By adjusting the amount of antibacterial agent, the pick-up rate during padding, the irradiation dose of electron beam and other parameters, 100% of staphylococcus aureus and escherichia coli can be inactivated, and meanwhile, the lower radiation dose will not affect the color, strength, whiteness and other performances of the fabric.

Description

Technical Field

[0001] This invention belongs to the field of functional finishing of textiles, and specifically relates to a method for preparing electron beam grafted antibacterial cotton textiles. Background Technology

[0002] Cotton fabric is a widely used natural fiber, and its properties such as moisture absorption, breathability, skin-friendliness, and biodegradability have secured it a significant market share in the textile industry. However, the hydrophilic nature of cotton fibers and the loose, porous structure of cotton fabrics make them an ideal environment for bacterial growth, leading to the spread of microorganisms and posing health risks. With technological advancements and increased public awareness of health, the demand for antibacterial fabrics is growing.

[0003] For cotton fabrics, antibacterial function can be achieved through three aspects: fiber, yarn, and fabric. For example, spinning solution containing antibacterial components can be used to prepare fibers with antibacterial effects. However, this method limits the application of subsequent fabrics to some extent and does not work on fabrics that have already been woven.

[0004] Antibacterial finishing of cotton fabrics is currently a widely studied method for preparing antibacterial fabrics. At present, antibacterial finishing of textiles mainly involves treating the fabrics by impregnation, padding or coating, followed by high-temperature baking to fix the antibacterial effect. This method is energy-intensive, causes serious pollution and has a relatively complex process. Summary of the Invention

[0005] To address the problems existing in the prior art, this application provides a method for preparing antibacterial cotton fabrics using an antibacterial agent containing unsaturated double bond groups via electron beam irradiation. This invention is simple to operate, energy-efficient, low-polluting, and environmentally friendly. The resulting cotton fabric exhibits highly effective antibacterial properties without affecting the fabric's color, strength, whiteness, or other properties.

[0006] To achieve the above objectives, the present invention provides a method for preparing electron beam grafted antibacterial cotton fabric, the specific steps of which are as follows:

[0007] (1) Padding treatment: The fabric is placed in the antibacterial working solution, immersed, and then taken out and pressed to obtain the padded cotton fabric.

[0008] (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation, it is taken out, washed with water and dried to obtain antibacterial fabric.

[0009] In one embodiment of the present invention, the fabric described in step (1) is a cotton fabric.

[0010] In one embodiment of the present invention, the antibacterial working solution in step (1) is an organic antibacterial agent solution containing unsaturated double bond groups, wherein the organic antibacterial agent includes one or more of the following: methacryloyloxyethyltrimethylammonium chloride, methacryloyloxyethyltrimethylammonium bromide, dimethyl diallyl ammonium chloride, dimethyl diallyl ammonium bromide, acryloyloxyethyltrimethylammonium chloride, acryloyloxyethyltrimethylammonium bromide, allyltrimethylammonium chloride, and allyltrimethylammonium bromide.

[0011] In one embodiment of the present invention, the mass concentration of the antibacterial working solution in step (1) is 10-20%.

[0012] In one embodiment of the present invention, the concentration of the antibacterial working solution in step (1) is preferably 20%.

[0013] In one embodiment of the present invention, the bath ratio of the fabric to the antibacterial working solution in step (1) is 1:20.

[0014] In one embodiment of the present invention, the immersion time in step (1) is 30-120 min.

[0015] In one embodiment of the present invention, the soaking time in step (1) is preferably 60 min.

[0016] In one embodiment of the present invention, the rolling allowance during step (1) is 65-90%.

[0017] In one embodiment of the present invention, the roll-off rate in step (1) is preferably 75%.

[0018] In one embodiment of the present invention, in step (2), before the fabric is subjected to electron beam irradiation grafting, the fabric must be sealed. The sealing method can be sealing with a sealing bag. The purpose of sealing is to prevent ionization of radiation, which would cause oxidation on the surface of the fabric, thereby causing a significant decrease in the antibacterial properties, color, and other properties of the fabric.

[0019] In one embodiment of the present invention, the drying temperature in step (2) is 60°C.

[0020] In one embodiment of the present invention, the drying time in step (2) is 10 min.

[0021] In one embodiment of the present invention, the electron beam irradiation dose in step (2) is 5-20 kGy.

[0022] In one embodiment of the present invention, the electron beam irradiation dose in step (2) is 8-16 kGy.

[0023] The beneficial technical effects of this invention are as follows:

[0024] (1) Unlike high-temperature baking, which is energy-intensive and polluting, this invention uses electron beam radiation to combine antibacterial agents with cotton fabrics. It operates at room temperature and does not require the addition of textile auxiliaries such as initiators and catalysts. This can improve production efficiency and is suitable for large-scale irradiation processing. Electron beam does not have the problem of radioactive element pollution. It is simple to operate, safe to use, energy-saving, and has low pollution.

[0025] (2) The present invention uses an antibacterial agent containing unsaturated double bond groups to treat the fabric and uses electron beam radiation to promote its grafting polymerization. The high-energy electron beam generated by the electron accelerator can ionize, excite, and generate free radicals, causing intermolecular cross-linking and degradation. The double bonds in the antibacterial agent containing unsaturated double bond groups are highly active, and the electron beam can easily trigger a chemical reaction between them and the hydroxyl groups of cellulose, giving the fabric an antibacterial effect. The resulting antibacterial fabric has excellent antibacterial properties.

[0026] (3) By adjusting parameters such as the amount of antibacterial agent, the roll residue during impregnation, and the irradiation dose of the electron beam, the present invention can inactivate Staphylococcus aureus and Escherichia coli 100%, while the low radiation dose will not affect the color, strength, whiteness and other properties of the fabric. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to specific embodiments.

[0028] Antibacterial performance testing of textiles

[0029] The test was conducted according to the method described in GB / T 20944.3—2008, the antimicrobial performance test standard, and the inoculated bacteria were Staphylococcus aureus and Escherichia coli O157:H7.

[0030] Example 1

[0031] This embodiment uses the following steps for processing:

[0032] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare a 20wt% METAC (methacryloyloxyethyltrimethylammonium chloride) antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, soak for 60 minutes, take it out and pad it, one soak and one pad, the padding rate is 75%, take it out, and you will get the padded cotton fabric.

[0033] Step (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed in a sealed bag and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation with 8 kGy, it is taken out, thoroughly washed with water, and dried at 60°C for 10 min to obtain antibacterial fabric.

[0034] Example 2

[0035] This embodiment uses the following steps for processing:

[0036] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare a 20wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, soak for 60 minutes, take it out and pad it, one soak and one pad, the padding rate is 75%, take it out, and you will get the padded cotton fabric.

[0037] Step (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed in a sealed bag and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation at 12 kGy, it is taken out, thoroughly washed with water, and dried at 60°C for 10 min to obtain antibacterial fabric.

[0038] Example 3

[0039] This embodiment uses the following steps for processing:

[0040] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare a 20wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, soak for 60 minutes, take it out and pad it, one soak and one pad, the padding rate is 75%, take it out, and you will get the padded cotton fabric.

[0041] Step (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed in a sealed bag and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation at 16 kGy, it is taken out, thoroughly washed with water, and dried at 60°C for 10 min to obtain antibacterial fabric.

[0042] Example 4

[0043] This embodiment uses the following steps for processing:

[0044] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare a 20wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, soak for 60 minutes, take it out and pad it, dip and pad twice, with a padding rate of 75%, take it out, and obtain the padded cotton fabric.

[0045] Step (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed in a sealed bag and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation with 8 kGy, it is taken out, thoroughly washed with water, and dried at 60°C for 10 min to obtain antibacterial fabric.

[0046] Example 5

[0047] This embodiment uses the following steps for processing:

[0048] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare a 10wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, soak for 60 minutes, take it out and pad it, one soak and one pad, the padding rate is 75%, take it out, and you will get the padded cotton fabric.

[0049] Step (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed in a sealed bag and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation with 8 kGy, it is taken out, thoroughly washed with water, and dried at 60°C for 10 min to obtain antibacterial fabric.

[0050] Example 6

[0051] This embodiment uses the following steps for processing:

[0052] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare a 30wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, soak for 60 minutes, take it out and pad it, one soak and one pad, the padding rate is 75%, take it out, and you will get the padded cotton fabric.

[0053] Step (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed in a sealed bag and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation with 8 kGy, it is taken out, thoroughly washed with water, and dried at 60°C for 10 min to obtain antibacterial fabric.

[0054] Example 7

[0055] This embodiment uses the following steps for processing:

[0056] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare 40wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, soak for 60 minutes, take it out and pad it, one soak and one pad, the padding rate is 75%, take it out, and you will get the padded cotton fabric.

[0057] Step (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed in a sealed bag and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation with 8 kGy, it is taken out, thoroughly washed with water, and dried at 60°C for 10 min to obtain antibacterial fabric.

[0058] Comparative Example 1

[0059] Traditional antibacterial process: This comparative example uses a high-temperature baking method to treat cotton fabrics, and the following steps are performed:

[0060] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare a 20wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, soak for 60 minutes, take it out and pad it, one soak and one pad, the padding rate is 75%, take it out, and you will get the padded cotton fabric.

[0061] Step (2) High-temperature baking grafting: Dry the fabric treated in step (1) at 60°C for 10 minutes. After drying, put the cotton fabric into a baking machine at 180°C for 5 minutes. After thorough washing, dry at 60°C for 10 minutes to obtain antibacterial fabric.

[0062] Comparative Example 2

[0063] This embodiment uses the following steps for processing:

[0064] Step (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare a 20wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:10, soak for 60 minutes, take it out and pad it, one soak and one pad, the padding rate is 75%, take it out, and you will get the padded cotton fabric.

[0065] Step (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed in a sealed bag and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation with 8 kGy, it is taken out, thoroughly washed with water, and dried at 60°C for 10 min to obtain antibacterial fabric.

[0066] Table 1 shows the antimicrobial performance tests of the antimicrobial fabrics in Comparative Examples 1-2 and Examples 1-7.

[0067]

[0068] Table 1 shows the antibacterial properties of the antibacterial fabrics in Comparative Examples 1-2 and Examples 1-7. As can be seen from Table 1, the antibacterial fabrics treated using the method of this invention can achieve 100% antibacterial activity against Staphylococcus aureus and Escherichia coli. Furthermore, under the experimental conditions of this invention, the fabric's color, whiteness, and strength do not decrease. Comparative Document 1 used a traditional high-temperature baking method combined with a quaternary ammonium salt antibacterial agent to treat the fabric. The antibacterial performance results show that the treated fabric had an inhibition rate of only 89.4% against Staphylococcus aureus and only 92.1% against Escherichia coli. This indicates that the fabric treated by the high-temperature baking method not only has poor antibacterial effect but also requires a large amount of energy. Comparative Example 2 adjusted the bath ratio of the fabric to the antibacterial working solution based on Example 1. The results show that as the bath ratio decreased, the antibacterial effect of the fabric also decreased significantly. The concentration of the antibacterial working solution, the bath ratio of the fabric to the antibacterial working solution, and the electron beam radiation dose all affect the fabric's properties. For example, a significant increase in the concentration of the antibacterial working solution and the bath ratio will lead to a decrease in the fabric's whiteness and strength. Similarly, an increase in the electron beam irradiation dose will also lead to a decrease in the fabric's strength and whiteness. In addition, if the fabric is not sealed when using electron beam irradiation, oxidation will occur on the fabric surface, resulting in a decrease in the fabric's antibacterial effect, as well as a significant decrease in its strength, color, and other properties. The antibacterial cotton fabric prepared by the method of this invention has excellent antibacterial properties, is easy to operate under normal temperature conditions, is safe to use, saves energy, and produces minimal pollution.

[0069] The present invention also compared the antibacterial properties of fabrics without antibacterial treatment and antibacterial fabrics in the examples, as shown in Table 2. As can be seen from Table 2, the antibacterial cotton fabrics prepared by the method of the present invention have excellent antibacterial properties and high antibacterial efficiency; after contact with inoculated bacteria, it can inactivate 100% of Staphylococcus aureus and 100% of Escherichia coli, with fast antibacterial rate and excellent antibacterial performance.

[0070] Table 2 shows the antibacterial performance test results of cotton fabrics without antibacterial treatment and the antibacterial cotton fabrics in Example 1.

[0071]

[0072] The embodiments provided above are not intended to limit the scope of the invention, nor are the described steps intended to limit the order of execution. Any obvious modifications made to the invention by those skilled in the art based on existing common knowledge also fall within the scope of protection defined by the claims.

Claims

1. A method for preparing electron beam grafted antibacterial cotton fabric, characterized in that, The specific steps are as follows: (1) Padding treatment: The fabric is placed in the antibacterial working solution, immersed, and then taken out and padded to obtain the padded cotton fabric. The antibacterial working solution is an organic antibacterial agent solution containing unsaturated double bond groups. The organic antibacterial agent includes one or more of the following: methacryloyloxyethyltrimethylammonium chloride, methacryloyloxyethyltrimethylammonium bromide, dimethyl diallyl ammonium chloride, dimethyl diallyl ammonium bromide, acryloyloxyethyltrimethylammonium chloride, acryloyloxyethyltrimethylammonium bromide, allyltrimethylammonium chloride, and allyltrimethylammonium bromide. (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed and grafted under β-ray irradiation of a high-energy electron accelerator. After irradiation, it is taken out, washed with water and dried to obtain antibacterial fabric. The electron beam irradiation dose is 8~16kGy.

2. The preparation method according to claim 1, characterized in that, The fabric mentioned in step (1) is a cotton fabric.

3. The preparation method according to claim 1, characterized in that, The mass concentration of the antibacterial working solution in step (1) is 10-20%.

4. The preparation method according to claim 1, characterized in that, In step (1), the bath ratio of the fabric to the antibacterial working solution is 1:

20.

5. The preparation method according to claim 1, characterized in that, Step (1) The soaking time is 30-120 minutes.

6. The preparation method according to claim 1, characterized in that, The rolling allowance during step (1) is 65-90%.

7. The preparation method according to claim 1, characterized in that, In step (2), the sealing method includes sealing with a sealing bag.

8. The preparation method according to claim 1, characterized in that, The drying temperature in step (2) is 60°C and the drying time is 10 min.

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