Method for improving the antibacterial performance of antibacterial cotton fabric by UV irradiation

Abstract

This invention discloses a method for enhancing the antibacterial properties of antibacterial cotton fabrics through UV irradiation, belonging to the field of functional finishing of textiles. The method includes the following steps: (1) Padding treatment: The fabric is immersed in an antibacterial working solution of a certain concentration for a certain period of time, then removed and padded, with a certain padding rate, to obtain padded cotton fabric; (2) UV irradiation: The fabric treated in step (1) is irradiated under UV light for a certain period of time; (3) High-temperature baking: The fabric treated in step (2) is baked at a certain temperature for a certain period of time, then removed, washed, and dried to obtain antibacterial fabric. This invention's finishing method of UV irradiation followed by high-temperature baking combines antibacterial agents with cotton fabrics, resulting in antibacterial fabrics with excellent antibacterial properties, providing a new method for antibacterial finishing of cotton fabrics.

Description

Technical Field

[0001] This invention belongs to the field of functional finishing of textiles, and specifically relates to a method for improving the antibacterial properties of antibacterial cotton fabrics by UV irradiation. Background Technology

[0002] Cotton fabrics are loved by consumers for their comfortable wearing experience, but due to the porous structure and hydrophilic and moisture-absorbing properties of cotton fibers, bacteria can easily grow and multiply on the fiber surface, leading to fabric damage, fading, and odor, which can have adverse effects on the human body and cause diseases and infections. In order to protect fabrics and reduce the harm of bacteria to the human body, the antibacterial properties of fabrics have become a focus of attention.

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

[0004] Currently, antibacterial treatment of textiles through finishing mainly involves applying solutions, coatings, or resins containing antibacterial components to the fabric through impregnation, padding, or coating. Depending on the preparation method, there are impregnation, surface coating, resin finishing, and microencapsulation methods. However, impregnation and surface coating methods have poor abrasion and wash resistance, while microencapsulation methods generally have limited antibacterial effects. Summary of the Invention

[0005] To address the problems existing in the prior art, this application provides a method for enhancing the antibacterial properties of antibacterial cotton fabrics by using an antibacterial agent containing unsaturated double bond groups through UV irradiation. UV irradiation technology, as an environmentally friendly technique, can impart antibacterial effects to fabrics and enhance their antibacterial performance by supplementing it with high-temperature baking. This invention is simple to operate, and the resulting cotton fabric exhibits highly efficient antibacterial properties.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A method for enhancing the antibacterial properties of antibacterial cotton fabrics by UV irradiation involves sequentially treating the fabric with UV irradiation and high-temperature baking, including the following steps:

[0008] (1) Padding treatment: The fabric is placed in an antibacterial working solution of a certain concentration, soaked for a certain time, and then taken out and padded. A certain padding rate is taken out to obtain padded cotton fabric.

[0009] (2) UV irradiation: The fabric treated in step (1) is irradiated under UV light and removed after a certain period of time;

[0010] (3) High-temperature baking: The fabric treated in step (2) is baked at a certain temperature, taken out for a certain time, washed with water and then dried to obtain antibacterial fabric.

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

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

[0013] Furthermore, organic antibacterial agents containing unsaturated double bond groups can be specifically selected from: methacryloyloxyethyltrimethylammonium chloride, dimethyl diallyl ammonium chloride, allyltrimethylammonium chloride, methacrylamide propyltrimethylammonium chloride, etc.

[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) also contains potassium persulfate, with a concentration of 2-8 g / L. Preferably, the concentration of potassium persulfate is 2.7 g / L.

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

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

[0018] Furthermore, the rolling allowance in step (1) is 65-90%. Alternatively, it can be 75%-85%.

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

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

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

[0022] Furthermore, the high-temperature baking in step (3) is baking at 130-200℃ for 3-10 minutes. Alternatively, baking at 150-180℃ for 3-10 minutes may be selected.

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

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

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

[0026] The beneficial technical effects of this invention are as follows:

[0027] In this invention, UV irradiation induces molecular vibration, rotation, and changes in electronic energy levels, generating free radicals. Antibacterial agents containing unsaturated double bond groups are highly reactive and readily react with cellulose, imparting an antibacterial effect to the fabric. This invention's method, through a combination of UV irradiation and high-temperature baking, achieves a synergistic antibacterial effect through this specific treatment process, resulting in 100% bacterial inactivation.

[0028] The antibacterial fabric prepared by the method of the present invention has excellent antibacterial properties and can inactivate 100% of Staphylococcus aureus and Escherichia coli. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to specific embodiments.

[0030] Example 1

[0031] (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare an antibacterial working solution containing 20wt% METAC (methacryloyloxyethyltrimethylammonium chloride) and 2.7g / L potassium persulfate, immerse for 60min, then take it out and pad it. Repeat the immersion and padding process, and take it out with a 75% padding rate to obtain the padded cotton fabric.

[0032] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 minutes and then removed.

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

[0034] Example 2

[0035] (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare an antibacterial working solution containing 10wt% METAC and 2.7g / L potassium persulfate, immerse for 60min, then take it out and pad it. Repeat the immersion and padding process, and take it out with a 75% padding rate to obtain the padded cotton fabric.

[0036] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 minutes and then removed.

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

[0038] Example 3

[0039] (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare an antibacterial working solution containing 20wt% METAC and 2.7g / L potassium persulfate, immerse for 60min, then take it out and pad it, immerse and pad it twice, take it out with 75% padding rate, and obtain the padded cotton fabric.

[0040] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 minutes and then removed.

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

[0042] Example 4

[0043] (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare an antibacterial working solution containing 20wt% METAC and 2.7g / L potassium persulfate, immerse for 60min, then take it out and pad it. Repeat the immersion and padding process, and take it out with 85% padding rate to obtain the padded cotton fabric.

[0044] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 minutes and then removed.

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

[0046] Example 5

[0047] (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare an antibacterial working solution containing 20wt% METAC and 2.7g / L potassium persulfate, immerse for 60min, then take it out and pad it. Repeat the immersion and padding process, and take it out with a 75% padding rate to obtain the padded cotton fabric.

[0048] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 5 minutes and then removed.

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

[0050] Example 6

[0051] (1) Padding treatment: Take a 10cm*10cm cotton fabric, prepare an antibacterial working solution containing 20wt% METAC and 2.7g / L potassium persulfate, immerse for 60min, then take it out and pad it. Repeat the immersion and padding process, and take it out with a 75% padding rate to obtain the padded cotton fabric.

[0052] (2) UV irradiation: The fabric treated in step (1) was irradiated under 300w UV for 10 minutes and then removed.

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

[0054] Antibacterial performance testing of textiles

[0055] The test was conducted according to the method described in GB / T 20944.3—2008, the standard for testing antibacterial properties.

[0056] Untreated raw cotton fabric was used as a control sample, and fabrics that underwent antibacterial treatment according to all steps of the methods described in Examples 1-6 were used as test samples. 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 Fabrics

[0058]

[0059] It is evident that the antibacterial cotton fabric prepared by the method of this invention has 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 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 performed:

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

[0063] Step (2) High-temperature baking grafting: Dry the fabric treated in step (1). After drying, put the cotton fabric into a baking machine at 180℃ and bake for 5 minutes. After thorough washing, dry to obtain antibacterial fabric.

[0064] Table 2 shows a comparison between Example 1 and the traditional high-temperature baking process.

[0065] Table 2. Antibacterial Performance Test of Antibacterial Cotton Fabrics

[0066]

[0067]

[0068] Comparative Example 2

[0069] UV irradiation process: This comparative example uses UV irradiation to treat cotton fabrics, and the following steps are performed:

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

[0071] Step (2) UV irradiation grafting: Irradiate the fabric treated in step (1) under 300w UV for 5 minutes, wash thoroughly with water and dry to obtain antibacterial fabric.

[0072] Table 3 shows a comparison between Example 1 and the traditional high-temperature baking process.

[0073] Table 3. Antibacterial Performance Tests of Antibacterial Cotton Fabrics

[0074]

[0075] Comparative Example 3

[0076] This comparative example uses high-temperature grafting followed by UV irradiation grafting. The specific steps are as follows:

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

[0078] Step (2) Dry the fabric after step (1). After drying, put the cotton fabric into a baking machine at 180℃ and bake for 5 minutes.

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

[0080] Table 4 shows a comparison between Example 1 and the traditional high-temperature baking process.

[0081] Table 4. Antibacterial Performance Test of Antibacterial Cotton Fabrics

[0082]

[0083] As can be seen from Comparative Examples 1 and 3, the antibacterial effect of the samples obtained by UV irradiation after baking is not significantly different from that of the samples obtained by baking alone; there is no significant improvement in antibacterial effect, and complete antibacterial effect cannot be achieved. Therefore, it seems that only by UV irradiation followed by baking can a synergistic effect be achieved, reaching a level of 100% complete antibacterial effect.

[0084] The embodiments provided above are not intended to limit the scope of the present invention, but are merely preferred embodiments of the present invention, and are not limited to the above embodiments. The described steps are not intended to limit the order of execution. Those skilled in the art, within the scope of the technology disclosed in the art, shall make equivalent substitutions or modifications according to the technical solutions and inventive concepts of the present invention, and such modifications or substitutions shall be covered within the protection scope of the claims of the present invention.

Claims

1. A method for enhancing the antibacterial properties of antibacterial cotton fabrics by UV irradiation, characterized in that, The fabric is treated with a combination of UV irradiation and high-temperature baking, including the following steps: (1) Padding treatment: The fabric is immersed in the antibacterial working solution, immersed and padded, and then removed to obtain the padded cotton fabric. (2) UV irradiation: The cotton fabric obtained in step (1) is irradiated under UV light; (3) High-temperature baking: After the irradiation in step (2) is completed, the fabric is baked at a certain temperature, then removed, washed, and dried to obtain antibacterial fabric; The antibacterial working solution in step (1) is an organic antibacterial agent solution containing 10wt%-20wt% unsaturated double bond groups; the antibacterial working solution also contains 2-8g / L of potassium persulfate; The UV irradiation mentioned in step (2) is 300W for 5-20 minutes; The high-temperature baking in step (3) is baking at 130-200℃ for 3-10 minutes.

2. The method according to claim 1, characterized in that, Organic antibacterial agents containing unsaturated double bond groups are selected from any one or more of the following: methacryloyloxyethyltrimethylammonium chloride, dimethyl diallyl ammonium chloride, allyltrimethylammonium chloride, and methacrylamidopropyltrimethylammonium chloride.

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

4. The method according to claim 1, characterized in that, In step (1), the impregnation time is 30-120 min; the rolling allowance is 65-90%.

5. The method according to any one of claims 1-4, characterized in that, The high-temperature baking in step (3) is baking at 180℃ for 5-10 minutes.

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