Method for improving antibacterial performance of antibacterial cotton fabric through UV irradiation

Abstract

The invention discloses a method for improving the antibacterial performance of an antibacterial cotton fabric through UV irradiation, and belongs to the field of functional finishing of textiles. The method comprises the following steps: 1) padding treatment: putting a fabric into an antibacterial working solution with a certain concentration, dipping for a certain time, then taking out and rolling, and taking out at a certain pick-up rate to obtain a padded cotton fabric; (2) UV irradiation: irradiating the fabric treated in the step (1) under UV, and taking out the fabric after a certain time; (3) high-temperature baking: baking the fabric treated in the step (2) at a certain temperature, taking out for a certain time, washing with water, and drying to obtain the antibacterial fabric. According to the invention, a finishing mode of first UV irradiation and then high-temperature baking is adopted, and the antibacterial agent is combined with the cotton fabric, so that the prepared antibacterial fabric has excellent antibacterial performance, and a new method is provided for antibacterial finishing of the cotton fabric.

Description

Technical Field

[0001] The invention belongs to the field of functional finishing of textiles, and particularly relates to a method for improving the antibacterial performance of antibacterial cotton fabrics by UV irradiation. Background Art

[0002] Cotton fabrics are popular among consumers due to their comfortable wearing performance. However, due to the porous structure and hydrophilic and hygroscopic properties of cotton fibers, bacteria can easily breed and multiply on the fiber surface, causing fabric damage, fading and odor, which has adverse effects on the human body and causes diseases and infections. In order to protect fabrics and reduce the damage of bacteria to the human body, the antibacterial properties of fabrics have become a focus of attention.

[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 used to prepare fibers with antibacterial effects. However, this method limits the application of subsequent fabrics to a certain extent and has no effect on fabrics that have already been woven.

[0004] At present, the antibacterial treatment of textiles through post-finishing is mainly carried out by impregnating, padding or coating solutions, coatings or resins containing antibacterial components onto the fabric. Depending on the preparation method, there are impregnation method, surface coating method, resin finishing method, microencapsulation method, etc., but the friction and washing resistance of the impregnation method and the surface coating method are poor, and the antibacterial effect of the microencapsulation method is average. Summary of the invention

[0005] In view of the problems existing in the prior art, the present application provides a method for improving the antibacterial properties of antibacterial cotton fabrics by UV irradiation using an antibacterial agent containing unsaturated double bond groups. As an environmentally friendly technology, UV irradiation technology can impart antibacterial effects to fabrics and improve antibacterial properties by high-temperature baking. The present invention is simple to operate, and the cotton fabrics obtained have high-efficiency antibacterial properties.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A method for improving the antibacterial properties of antibacterial cotton fabric by UV irradiation is to use UV irradiation and high temperature baking to synergistically treat the fabric, comprising the following steps:

[0008] (1) Padding treatment: the fabric is placed in an antibacterial working solution of a certain concentration, and after being immersed for a certain period of time, it is taken out and pressed, and a certain rolling rate is taken out to obtain a padding-treated cotton fabric;

[0009] (2) UV irradiation: irradiate the fabric treated in step (1) under UV light and take it out after a certain period of time;

[0010] (3) High temperature baking: baking the fabric treated in step (2) at a certain temperature, taking it out for a certain period of time, washing it with water and then drying it to obtain the antibacterial fabric.

[0011] Furthermore, the fabric in step (1) is cotton fabric.

[0012] Furthermore, the antibacterial working solution in step (1) is an organic antibacterial agent solution containing unsaturated double bond groups.

[0013] Furthermore, the organic antibacterial agent containing an unsaturated double bond group can be specifically selected from: methacryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride, allyl trimethyl ammonium chloride, methacrylamide propyl trimethyl ammonium chloride, and the like.

[0014] Furthermore, the concentration of the antibacterial agent in the antibacterial working solution in step (1) is 10wt%-20wt%, preferably 20wt%.

[0015] Furthermore, the antibacterial working solution in step (1) further contains potassium persulfate, and the concentration of potassium persulfate is 2-8 g / L. Preferably, the concentration of potassium persulfate is 2.7 g / L.

[0016] Furthermore, the immersion time in step (1) is 30-120 min.

[0017] Preferably, the immersion time in step (1) is 60 minutes.

[0018] Furthermore, the rolling margin in step (1) is 65%-90%, and can be further 75%-85%.

[0019] Preferably, the rolling rate in step (1) is 75%.

[0020] Furthermore, the UV irradiation in step (2) is 300W irradiation for 5-20min.

[0021] Preferably, the UV irradiation in step (2) is 300W irradiation for 5-10min.

[0022] Furthermore, the high temperature baking in step (3) is baking at 130-200° C. for 3-10 min, and can be further baking at 150-180° C. for 3-10 min.

[0023] Preferably, the high temperature baking in step (3) is baking at 180° C. for 5 min.

[0024] The present invention provides an antibacterial cotton fabric prepared based on the method.

[0025] The invention also provides application of the antibacterial cotton fabric in the textile field.

[0026] The beneficial technical effects of the present invention are:

[0027] In the method of the present invention, UV irradiation can cause the vibration, rotation, and electronic energy level change of molecules to generate free radicals. The antibacterial agent containing unsaturated double bond groups is highly active and easily causes it to react with cellulose, thereby imparting an antibacterial effect to the fabric. The method of the present invention first irradiates with UV and then bakes at high temperature. Based on this specific treatment process, a synergistic antibacterial effect is exerted, and 100% of bacteria can be inactivated.

[0028] The antibacterial fabric prepared by the method of the invention has excellent antibacterial performance and can inactivate 100% of Staphylococcus aureus and Escherichia coli. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below in conjunction with specific embodiments.

[0030] Example 1

[0031] (1) Padding treatment: Take a 10 cm*10 cm cotton fabric, prepare an antibacterial working solution containing 20 wt% METAC (methacryloyloxyethyl trimethyl ammonium chloride) and 2.7 g / L potassium persulfate, immerse for 60 min, then take out and pad. After immersion and padding, take out at 75% padding rate to obtain a padding-treated cotton fabric;

[0032] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 min and then taken out;

[0033] (3) High temperature baking: The fabric treated in step (2) is baked at 180°C for 5 min, taken out, washed thoroughly with water and then dried to obtain an antibacterial fabric.

[0034] Example 2

[0035] (1) Padding treatment: Take a 10 cm*10 cm cotton fabric, prepare an antibacterial working solution containing 10 wt% METAC and 2.7 g / L potassium persulfate, immerse for 60 min, then take it out and roll it, immerse and roll it once, and take it out at a rolling rate of 75% to obtain a padding-treated cotton fabric;

[0036] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 min and then taken out;

[0037] (3) High temperature baking: The fabric treated in step (2) is baked at 180°C for 5 min, taken out, washed thoroughly with water and then dried to obtain an antibacterial fabric.

[0038] Example 3

[0039] (1) Padding treatment: Take a 10 cm*10 cm cotton fabric, prepare an antibacterial working solution containing 20 wt% METAC and 2.7 g / L potassium persulfate, immerse for 60 min, then take it out and roll it, immerse twice and roll it twice, take it out at a rolling rate of 75%, and obtain a padding-treated cotton fabric;

[0040] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 min and then taken out;

[0041] (3) High temperature baking: The fabric treated in step (2) is baked at 180°C for 5 min, taken out, washed thoroughly with water and then dried to obtain an antibacterial fabric.

[0042] Example 4

[0043] (1) Padding treatment: Take a 10 cm*10 cm cotton fabric, prepare an antibacterial working solution containing 20 wt% METAC and 2.7 g / L potassium persulfate, immerse for 60 min, then take it out and pad it, immerse and pad once, take it out at 85% padding rate, and obtain a pad-treated cotton fabric;

[0044] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 min and then taken out;

[0045] (3) High temperature baking: The fabric treated in step (2) is baked at 180°C for 5 min, taken out, washed thoroughly with water and then dried to obtain an antibacterial fabric.

[0046] Example 5

[0047] (1) Padding treatment: Take a 10 cm*10 cm cotton fabric, prepare an antibacterial working solution containing 20 wt% METAC and 2.7 g / L potassium persulfate, immerse for 60 min, then take it out and pad it, immerse and pad once, take it out at 75% padding rate, and obtain a pad-treated cotton fabric;

[0048] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 min and then taken out;

[0049] (3) High temperature baking: The fabric treated in step (2) is baked at 150°C for 5 min, taken out, washed thoroughly with water and then dried to obtain an antibacterial fabric.

[0050] Example 6

[0051] (1) Padding treatment: Take a 10 cm*10 cm cotton fabric, prepare an antibacterial working solution containing 20 wt% METAC and 2.7 g / L potassium persulfate, immerse for 60 min, then take it out and pad it, immerse and pad once, take it out at 75% padding rate, and obtain a pad-treated cotton fabric;

[0052] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 10 min and then taken out;

[0053] (3) High temperature baking: The fabric treated in step (2) is baked at 180°C for 5 min, taken out, washed thoroughly with water and then dried to obtain an antibacterial fabric.

[0054] Textile Antibacterial Performance Testing

[0055] The test was carried out according to the method described in GB / T 20944.3-2008 antibacterial performance test standard.

[0056] Untreated raw cotton fabric was taken as a control sample, and the fabric subjected to antibacterial finishing according to all the steps of the method described in Examples 1-6 was taken as a test sample. The inoculated bacteria were Staphylococcus aureus and Escherichia coli O157:H7. The test results are shown in Table 1.

[0057] Table 1 Antibacterial performance test of antibacterial cotton fabric

[0058]

[0059] It can be seen that the antibacterial cotton fabric prepared by the method of the present invention has excellent antibacterial performance and high antibacterial efficiency; after contacting with the inoculated bacteria, it can inactivate 100% of Staphylococcus aureus and 100% of Escherichia coli, has a fast antibacterial rate, excellent antibacterial performance, and less damage to the fabric.

[0060] Comparative Example 1

[0061] Traditional antibacterial process: This comparative example uses a high-temperature baking method to treat cotton fabrics, and the following steps are used for treatment:

[0062] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare a 20 wt% METAC antibacterial working solution, put the fabric into the antibacterial working solution, 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;

[0063] Step (2) high temperature baking grafting: the fabric treated in step (1) is dried, and after drying, the cotton fabric is placed in a baking machine at 180°C and baked for 5 minutes. After being fully washed with water, it is dried to obtain an antibacterial fabric.

[0064] The comparison between Example 1 and the traditional high temperature baking process is shown in Table 2.

[0065] Table 2 Antibacterial performance test of antibacterial cotton fabric

[0066]

[0067]

[0068] Comparative Example 2

[0069] UV irradiation process: This comparative example uses UV irradiation method to treat cotton fabric, and the following steps are used for treatment:

[0070] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare an antibacterial working solution with 20 wt% METAC and 2.7 g / L potassium persulfate concentration, put the fabric into the antibacterial working solution, 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;

[0071] Step (2) UV irradiation grafting: the fabric treated in step (1) is irradiated under 300w UV for 5 minutes, washed thoroughly with water and then dried to obtain an antibacterial fabric.

[0072] The comparison between Example 1 and the traditional high temperature baking process is shown in Table 3.

[0073] Table 3 Antibacterial performance test of antibacterial cotton fabric

[0074]

[0075] Comparative Example 3

[0076] This comparative example adopts high temperature grafting followed by UV irradiation grafting, and the specific steps are as follows:

[0077] Step (1) padding treatment: take a 10 cm*10 cm cotton fabric, prepare an antibacterial working solution with 20 wt% METAC and 2.7 g / L potassium persulfate concentration, put the fabric into the antibacterial working solution, 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;

[0078] Step (2) drying the fabric treated in step (1), and after drying, placing the cotton fabric in a baking machine at 180° C. and baking for 5 minutes before taking it out;

[0079] Step (3) UV irradiation grafting: the fabric treated in step (2) is irradiated under 300w UV for 5 minutes, taken out, washed thoroughly with water and then dried to obtain an antibacterial fabric.

[0080] The comparison between Example 1 and the traditional high temperature baking process is shown in Table 4.

[0081] Table 4 Antibacterial performance test of antibacterial cotton fabric

[0082]

[0083] Combining Comparative Examples 1 and 3, it can be seen that the antibacterial effect of the sample obtained by UV irradiation after baking is not much different from that of the sample obtained by simple baking, and there is no significant antibacterial enhancement effect, and the complete antibacterial effect cannot be achieved. Therefore, only UV irradiation followed by baking can exert a synergistic effect and reach a 100% complete antibacterial level.

[0084] The embodiments provided above are not intended to limit the scope of the present invention, but are only preferred embodiments of the present invention, and are not limited to the above embodiments. The steps described are not intended to limit the execution order thereof. Those skilled in the art can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed in the art, and all of them should be included in the protection scope of the claims of the present invention.

Claims

1. A method for improving the antibacterial properties of antibacterial cotton fabrics by UV irradiation, characterized in that: The process is to use UV irradiation and high temperature baking to treat the fabric in synergy, including the following steps: (1) Padding treatment: the fabric is placed in an antibacterial working solution, immersed and pressed, and then the padding-treated cotton fabric is obtained; (2) UV irradiation: irradiating the padding-treated cotton fabric obtained in step (1) under UV light; (3) High temperature baking: After the irradiation in step (2) is completed, baking is performed at a certain temperature, taking out, washing, and drying to obtain an antibacterial fabric.

2. The 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.

3. The method according to claim 2, characterized in that The organic antibacterial agent containing an unsaturated double bond group is selected from any one or more of the following: methacryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride, allyl trimethyl ammonium chloride, and methacrylamide propyl trimethyl ammonium chloride.

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

5. The method according to claim 1, characterized in that The antibacterial working solution in step (1) also contains 2-8 g / L of potassium persulfate; the immersion time is 30-120 min; and the rolling rate of rolling is 65-90%.

6. The method according to claim 1, characterized in that The UV irradiation in step (2) is 300w irradiation for 5-20min.

7. The method according to claim 1, characterized in that The high temperature baking in step (3) is baking at 130-200° C. for 3-10 min.

8. The method according to any one of claims 1 to 7, characterized in that: The high temperature baking in step (3) is baking at 180° C. for 5-10 min.

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

10. Use of the antibacterial cotton fabric according to claim 9 in the textile field.

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