Preparation method of electron beam grafting antibacterial cotton textile

Abstract

The invention discloses a preparation method of an electron beam grafted antibacterial cotton fabric, which comprises the following steps: putting a fabric into an antibacterial working solution, dipping, taking out, rolling, sealing, grafting by electron beam irradiation and the like. The antibacterial agent containing unsaturated double-bond groups is adopted for finishing the fabric, grafting polymerization of the fabric is promoted through electron beam radiation, high-energy electron beams generated by an electron accelerator can be ionized and excited, free radicals are generated, cross-linking and degradation among molecules are caused, double bonds in the antibacterial agent containing the unsaturated double-bond groups are high in activity, and the antibacterial agent containing the unsaturated double-bond groups has good antibacterial effect. Electron beams are easy to initiate a chemical reaction with hydroxyl groups of cellulose, so that the fabric is endowed with an antibacterial effect, and the prepared antibacterial fabric has excellent antibacterial performance. Staphylococcus aureus and Escherichia coli can be completely inactivated by adjusting the dosage of the antibacterial agent, the pick-up rate during padding, the irradiation dose of electron beams and other parameters, and meanwhile, the color, strength, whiteness and other properties of the fabric cannot be affected by the low irradiation dose.

Description

Technical Field

[0001] The invention belongs to the field of functional finishing of textiles, and in particular relates to a method for preparing electron beam grafted antibacterial cotton textiles. Background Art

[0002] Cotton fabric is a kind of fabric made of natural fiber that is widely used by people. It occupies an important market share in the textile industry due to its characteristics of moisture absorption, breathability, skin-friendly and biodegradable. However, the hydrophilicity of cotton fiber and the loose and porous structure of cotton fabric make it an ideal environment for bacteria to breed, leading to the spread of microorganisms and causing harm to health. With the development of science and technology and people's concern for health, people's demand for antibacterial fabrics is getting higher and higher.

[0003] For cotton fabrics, the antibacterial function can be achieved through fibers, yarns, and fabrics. For example, a spinning solution containing antibacterial components can be prepared into fibers with antibacterial effects. However, this method limits the application of subsequent fabrics to a certain extent and has no effect on existing woven fabrics.

[0004] The antibacterial post-finishing of cotton fabrics is a method for preparing antibacterial fabrics that has been widely studied. Currently, the antibacterial post-finishing of textiles is mainly carried out by treating the fabrics by dipping, padding or coating, and then baking them at high temperature to give them an antibacterial effect. This method has high energy consumption, serious pollution and relatively complex process. Summary of the invention

[0005] In view of the problems existing in the prior art, the present application provides a method for preparing antibacterial cotton fabric by electron beam irradiation using an antibacterial agent containing unsaturated double bond groups. The present invention is simple to operate, has low energy consumption, low pollution, and is green and environmentally friendly. The prepared cotton fabric has high antibacterial properties and has no effect on the color, strength, whiteness and other properties of the fabric.

[0006] In order to achieve the above object, the present invention provides a method for preparing electron beam grafted antibacterial cotton fabric, the specific steps are as follows:

[0007] (1) Padding treatment: the fabric is placed in an antibacterial working solution, and after immersion, the fabric is taken out and pressed to obtain a padding-treated cotton fabric;

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

[0009] In one embodiment of the present invention, the fabric in step (1) is 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, and the organic antibacterial agent includes one or more of methacryloyloxyethyl trimethylammonium chloride, methacryloyloxyethyl trimethylammonium bromide, dimethyldiallyl ammonium chloride, dimethyldiallyl ammonium bromide, acryloyloxyethyl trimethylammonium chloride, acryloyloxyethyl trimethylammonium bromide, allyl trimethylammonium chloride, and allyl trimethylammonium 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 minutes.

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

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

[0017] In one embodiment of the present invention, the rolling 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 needs to be sealed first. The sealing method can be sealing with a sealing bag. The purpose of sealing is to prevent radiation ionization from causing oxidation on the fabric surface, thereby significantly reducing 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 minutes.

[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 the present invention are:

[0024] (1) Different from high-temperature baking with high energy consumption and high pollution, the present invention adopts electron beam radiation finishing to combine antibacterial agent with cotton fabric, operates under room temperature conditions, and does not need to add textile auxiliaries such as initiator catalyst, which can improve production efficiency and is suitable for large-scale irradiation processing. Electron beam does not have the problem of radioactive element pollution, is simple to operate, safe to use, saves energy, and has low pollution.

[0025] (2) The present invention uses an antibacterial agent containing unsaturated double bond groups to finish the fabric, and uses electron beam radiation to promote its graft polymerization. The high-energy electron beam generated by the electron accelerator can ionize, excite, and generate free radicals, causing molecular 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 induce it to chemically react with the hydroxyl group of cellulose, giving the fabric an antibacterial effect. The resulting antibacterial fabric has excellent antibacterial properties.

[0026] (3) The present invention can inactivate Staphylococcus aureus and Escherichia coli 100% by adjusting the dosage of the antibacterial agent, the rolling rate during padding, the irradiation dose of the electron beam and other parameters. At the same time, the lower radiation dose will not affect the color, strength, whiteness and other properties of the fabric. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with specific embodiments.

[0028] Textile Antibacterial Performance Testing

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

[0030] Example 1

[0031] This embodiment adopts the following steps to process:

[0032] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare a 20 wt% METAC (methacryloyloxyethyl trimethyl ammonium chloride) antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, immerse for 60 minutes, then take it out and pad it, immerse once and pad once, the padding rate is 75%, take it out, and obtain a padding-treated cotton fabric;

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

[0034] Example 2

[0035] This embodiment adopts the following steps to process:

[0036] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare 20 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, immerse for 60 minutes, then take it out and pad it, immerse once and pad once, the padding rate is 75%, take it out, and obtain the padding treated cotton fabric;

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

[0038] Example 3

[0039] This embodiment adopts the following steps to process:

[0040] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare 20 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, immerse for 60 minutes, then take it out and pad it, immerse once and pad once, the padding rate is 75%, take it out, and obtain the padding treated cotton fabric;

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

[0042] Example 4

[0043] This embodiment adopts the following steps to process:

[0044] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare 20 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, immerse for 60 minutes, then take it out and roll it, immerse twice and roll it twice, with a rolling rate of 75%, take it out, and obtain a padding-treated cotton fabric;

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

[0046] Example 5

[0047] This embodiment adopts the following steps to process:

[0048] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare 10 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, immerse for 60 minutes, then take it out and pad it, immerse once and pad once, the padding rate is 75%, take it out, and obtain the padding treated cotton fabric;

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

[0050] Example 6

[0051] This embodiment adopts the following steps to process:

[0052] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare 30 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, immerse for 60 minutes, then take it out and pad it, immerse once and pad once, the padding rate is 75%, take it out, and obtain the padding treated cotton fabric;

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

[0054] Example 7

[0055] This embodiment adopts the following steps to process:

[0056] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare 40 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, immerse for 60 minutes, then take it out and pad it, immerse once and pad once, the padding rate is 75%, take it out, and obtain the padding treated cotton fabric;

[0057] Step (2) electron beam irradiation grafting: the fabric treated in step (1) is sealed in a sealed bag, and grafted under irradiation of β-rays from a high-energy electron accelerator, taken out after irradiation with 8 kGy, washed thoroughly with water, and dried at 60° C. for 10 min to obtain an 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 used for treatment:

[0060] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare 20 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:20, immerse for 60 minutes, then take it out and pad it, immerse once and pad once, the padding rate is 75%, take it out, and obtain the padding treated cotton fabric;

[0061] Step (2) high temperature baking grafting: the fabric treated in step (1) is dried at 60°C for 10 minutes, and after drying, the cotton fabric is placed in a baking machine at 180°C for 5 minutes. After being fully washed with water, the fabric is dried at 60°C for 10 minutes to obtain an antibacterial fabric.

[0062] Comparative Example 2

[0063] This embodiment adopts the following steps to process:

[0064] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare 20 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution at a bath ratio of 1:10, immerse for 60 minutes, then take out and pad. After immersion and padding, the padding rate is 75%, take out and obtain a padding treated cotton fabric;

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

[0066] Table 1 Antibacterial performance test of antibacterial fabrics in Comparative Examples 1 to 2 and Examples 1 to 7

[0067]

[0068] Table 1 shows the antibacterial properties of the antibacterial fabrics in Comparative Examples 1-2 and Examples 1-7. It can be seen from Table 1 that the antibacterial fabrics finished by the method of the present invention can achieve 100% antibacterial effect on Staphylococcus aureus and Escherichia coli, and under the experimental conditions of the present invention, the color, whiteness and strength of the fabric will not decrease. Comparative Document 1 uses the traditional high-temperature baking method combined with quaternary ammonium salt antibacterial agent to finish the fabric. From the antibacterial performance results, it can be seen that the antibacterial rate of the finished fabric against Staphylococcus aureus is only 89.4%, and the antibacterial rate against Escherichia coli is only 92.1%, indicating that the fabric finished by the high-temperature baking method not only has poor antibacterial effect, but also requires a lot of energy to finish the fabric by the high-temperature baking method. Comparative Example 2 adjusts the bath ratio of the fabric and the antibacterial working solution on the basis of Example 1. The results show that the antibacterial effect of the fabric is significantly reduced when the bath ratio is reduced. The concentration of the antibacterial working solution, the bath ratio of the fabric to the antibacterial working solution, and the electron beam radiation dose will all affect the performance of the fabric. For example, a significant increase in the concentration of the antibacterial working solution and an increase in the bath ratio will lead to a decrease in the whiteness and strength of the fabric. An increase in the electron beam radiation dose will also lead to a decrease in the strength and whiteness of the fabric. In addition, when the fabric is irradiated with an electron beam, if the fabric is not sealed, oxidation will occur on the surface of the fabric. While the antibacterial effect of the fabric is reduced, the strength, color and other properties of the fabric will also be significantly reduced. The antibacterial cotton fabric prepared by the method of the present invention has excellent antibacterial properties, is operated under normal temperature conditions, is simple to operate, safe to use, saves energy, and has little pollution.

[0069] The present invention also compares the antibacterial properties of the fabric without antibacterial finishing and the antibacterial fabric in the embodiment, as shown in Table 2. It can be seen from Table 2 that the antibacterial cotton fabric prepared by the method of the present invention has excellent antibacterial properties and high antibacterial efficiency; after contacting with the inoculated bacteria, it can inactivate 100% of Staphylococcus aureus and 100% of Escherichia coli, with a fast antibacterial rate and excellent antibacterial properties.

[0070] Table 2 Antibacterial properties test results of cotton fabrics without antibacterial finishing and antibacterial cotton fabrics in Example 1

[0071]

[0072] The embodiments provided above are not intended to limit the scope of the present invention, and the steps described are not intended to limit the execution order thereof. Those skilled in the art may make obvious improvements to the present invention in combination with existing common knowledge, which also fall within the scope of protection defined by the claims of the present invention.

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 an antibacterial working solution, and after immersion, the fabric is taken out and pressed to obtain a padding-treated cotton fabric; (2) Electron beam irradiation grafting: The fabric treated in step (1) is sealed and grafted under irradiation of β-rays from a high-energy electron accelerator. After irradiation, the fabric is taken out, washed with water, and then dried to obtain an antibacterial fabric.

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

3. The preparation method according to claim 1, characterized in that: The antibacterial working solution in step (1) is an organic antibacterial agent solution containing unsaturated double bond groups, and the organic antibacterial agent includes one or more of methacryloyloxyethyl trimethylammonium chloride, methacryloyloxyethyl trimethylammonium bromide, dimethyldiallyl ammonium chloride, dimethyldiallyl ammonium bromide, acryloyloxyethyl trimethylammonium chloride, acryloyloxyethyl trimethylammonium bromide, allyl trimethylammonium chloride, and allyl trimethylammonium bromide.

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

5. 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.

6. The preparation method according to claim 1, characterized in that: The immersion time in step (1) is 30-120 minutes.

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

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

9. 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.

10. The preparation method according to claim 1, characterized in that: The electron beam irradiation dose in step (2) is 8 to 16 kGy.

Images