Multicolor antibacterial polyester-cotton fabric and preparation method thereof

Abstract

The present application relates to a kind of multicolor antibacterial polyester cotton fabric and its preparation method, belong to textile technical field.The preparation method of the present application includes the following steps, S1, dispersion dye is dissolved in dispersion liquid to obtain dyeing liquid, polyester cotton fabric is immersed in the dyeing liquid, dyeing is carried out by high temperature and high pressure method, and dyed polyester cotton fabric is obtained;The dispersion liquid is obtained by mixing dispersion solvent and water according to the volume ratio 1:9-11;S2, dyed polyester cotton fabric is immersed in trimer cyanogen chloride solution, and activated dyed polyester cotton fabric is obtained by reaction;S3, activated dyed polyester cotton fabric is immersed in photosensitizer solution, and the multicolor antibacterial polyester cotton fabric of the present application is obtained by reaction.The multicolor antibacterial polyester cotton fabric of the present application has at least 99.58% bactericidal efficiency to gram-positive staphylococcus aureus and gram-negative escherichia coli under light condition (65±5mW / cm 2 , 400nm-700nm, 60min).

Description

Technical Field

[0001] This invention belongs to the field of textile technology, and in particular relates to a multi-color antibacterial polyester-cotton fabric and its preparation method. Background Technology

[0002] Currently, the mainstream antibacterial methods include traditional chemical sterilization, irradiation sterilization, cationic antibacterial surfaces, metal and oxide nanoparticle materials, antibiotics, and other bactericides. While each is a mature and effective antibacterial method, each has some of the shortcomings listed in the table: Traditional chemical sterilization, represented by alcohol wiping, requires multiple manual operations and cannot achieve real-time autonomous sterilization; chemical reagents have odors, and repeated wiping can damage the equipment surface. Irradiation sterilization, represented by ultraviolet light, has high equipment requirements. Cationic antibacterial surfaces, represented by chitin polymer cationic materials or ammonium salt-loaded materials, rely on the interaction between positively charged groups in the material and negatively charged cell membranes to destroy microbial cells, thus requiring specific environmental humidity and pH levels; the number of cationic groups loaded in the material is limited, and the antibacterial capacity and durability need improvement. Metal and oxide nanoparticles, represented by silver, copper, and titanium ions and their oxides, are sensitizing to humans, and the metal ions released from the material can accumulate, burdening the environment and human health. Antibiotics and other bactericides, represented by Triclosan®, are prone to inducing new drug resistance and do not have broad-spectrum antibacterial properties; their loading capacity is also limited.

[0003] Photodynamic antibacterial fabrics absorb photosensitizers (PS) from visible light sources and fix them onto specific fabric surfaces. When the photosensitizers on the surface absorb photons from the visible light spectrum, they interact with oxygen to generate reactive oxygen species (ROS), forming an antibacterial protective layer on the fabric surface. This antibacterial method possesses non-specific antibacterial properties (ROS has strong oxidizing properties against all microorganisms), biosafety and environmental friendliness (ROS has an extremely limited lifespan and diffusion range), as well as being proactive and controllable (the reaction requires and only requires the simultaneous presence of light and oxygen to trigger), and persistent (under ideal conditions, the photodynamic sterilization process currently does not involve the loss of photosensitizers), making it a promising new antibacterial modality.

[0004] Currently, due to the optical properties of photosensitizers themselves, antibacterial fabrics based on photodynamic technology generally cannot overcome the problem of color diversity, and cannot meet the needs of hospitals and other related health care places for textiles with color differentiation. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem of monochromatic color in the prior art of photodynamic antibacterial fabrics.

[0006] To address the aforementioned technical problems, this invention provides a multi-color antibacterial polyester-cotton fabric and its preparation method. Traditional disperse dyes and photosensitizers are simultaneously applied to the polyester-cotton fabric, and the fabric maintains the highly effective antibacterial properties of the photosensitizer while also maintaining the same color as the disperse dyes.

[0007] The first objective of this invention is to provide a method for preparing multi-color antibacterial polyester-cotton fabric, comprising the following steps:

[0008] S1. Dissolve the disperse dye in a dispersion solution to obtain a dyeing solution. Immerse the polyester-cotton fabric in the dyeing solution and dye it using a high-temperature and high-pressure method to obtain the dyed polyester-cotton fabric. The dispersion solution is obtained by mixing the dispersion solvent and water at a volume ratio of 1:9-11.

[0009] S2. Immerse the dyed polyester-cotton fabric described in S1 into a cyanuric chloride solution to obtain an activated dyed polyester-cotton fabric.

[0010] S3. Immerse the activated dyed polyester-cotton fabric described in S2 into a photosensitizer solution to obtain the multi-colored antibacterial polyester-cotton fabric.

[0011] In one embodiment of the present invention, in S1, the dispersing solvent is selected from Sunsolt 7000.

[0012] In one embodiment of the present invention, in S1, the mass concentration of the disperse dye in the dyeing solution is 1%-3%.

[0013] In one embodiment of the present invention, in S1, the disperse dye is selected from at least two of Disperse Red 153, Disperse Yellow 23 and Disperse Blue 60.

[0014] In one embodiment of the present invention, in S1, the conditions of the high temperature and high pressure method are: temperature 125℃-135℃; pressure 1.2Pa-1.5Pa; time 30min-45min.

[0015] In one embodiment of the present invention, in S3, the photosensitizer is selected from one or more of Laureus violet, rose red and methylene blue.

[0016] In one embodiment of the present invention, in S2 and S3, the molar ratio of cyanuric chloride to photosensitizer is 4-4.5:1.

[0017] In one embodiment of the present invention, in S2 and S3, the reaction temperature is 35°C-45°C and the time is 12h-14h.

[0018] In one embodiment of the present invention, the bath ratio of the fabric to the finishing solution is 1:30-50; the finishing solution is a dyeing solution, cyanuric chloride solution, or photosensitizer solution.

[0019] A second objective of this invention is to provide a multi-color antibacterial polyester-cotton fabric prepared by the method described above.

[0020] The technical solution of the present invention has the following advantages compared with the prior art:

[0021] (1) The preparation method described in this invention produces photodynamic antibacterial polyester-cotton fabrics with different colors and loaded with Laureus violet photosensitizer, breaking the color limitation of photodynamic fabrics themselves.

[0022] (2) The multi-color antibacterial polyester-cotton fabric of the present invention, under light conditions (65±5mW / cm) 2 The light (400nm-700nm, 60min) showed at least 99.58% bactericidal efficiency against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli.

[0023] (3) The disperse dyes loaded on the multicolor antibacterial polyester-cotton fabric described in this invention do not affect the yield of active oxygen and the photodynamic sterilization efficiency. At the same time, they have a photobleaching inhibition effect on photosensitizers, which can help extend the service life of photodynamic materials. Attached Figure Description

[0024] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the preparation process of the multi-color antibacterial polyester-cotton fabric in Embodiment 1 of the present invention; Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0027] In this invention, unless otherwise stated, the bath ratio of the fabric to the finishing solution is 1:40.

[0028] Example 1

[0029] Reference Figure 1 As shown, the multi-color antibacterial polyester-cotton fabric and its preparation method of the present invention specifically include the following steps:

[0030] S1. Four traditional disperse dyes are loaded onto polyester fibers using a high-temperature, high-pressure method.

[0031]

[0032] S11. Dissolve equal masses of four disperse dyes—Disperse Red 153 (CAS78564-87-1), Disperse Yellow 23 (CAS6250-23-3), Disperse Blue 60 (CAS12217-80-0), and Disperse Green (Disperse Yellow 23 and Disperse Blue 60 mixed in a 1:1 mass ratio)—in a dispersion consisting of 100 mL of water and 10 mL of Sunsolt 7000 (CAS65423-83-8) to obtain a dyeing solution; the total mass concentration of the disperse dyes in the dyeing solution is 2%.

[0033] S12. The polyester-cotton fabric was first cut into 8cm × 8cm samples. These samples were then immersed in a dyeing solution and continuously heated from 30°C to 130°C at a rate of 4°C / min in a high-temperature, high-pressure dyeing machine, with a pressure of 1.3 Pa, and held at 130°C for 30 minutes. The dyed polyester-cotton fabric was then boiled in water containing 2g / L NaOH and 2g / L Na₂S₂O₄ for 20 minutes to remove free dyes, polyester oligomers, and other impurities. Finally, it was washed with deionized water to obtain the dyed polyester-cotton fabric.

[0034] S2. Loading the photosensitizer Laureth violet onto cotton fibers via cyanuric chloride chemical grafting.

[0035]

[0036] S21. The dyed polyester-cotton fabric sample was soaked in 1M NaOH for 1 hour to deprotonate the hydroxyl groups of the cotton yarn; then the alkalized fabric was immersed in a tetrahydrofuran solution of cyanuric chloride and reacted at 40°C for 12 hours. Then, the unreacted cyanuric chloride and other impurities were washed away with deionized water and tetrahydrofuran to obtain the activated dyed polyester-cotton fabric.

[0037] S22. The activated dyed polyester-cotton fabric is immersed in 80 mL of deionized water (DI) with Laureth violet (the molar ratio of Laureth violet to cyanuric chloride is 1:4) and reacted at 40°C for 12 h. After the reaction is complete, the fabric is washed with water and dried at 40°C to obtain multi-colored antibacterial polyester-cotton fabric.

[0038] Example 2

[0039] The multi-color antibacterial polyester-cotton fabric and its preparation method of the present invention specifically include the following steps:

[0040] S1. Four traditional disperse dyes are loaded onto polyester fibers using a high-temperature, high-pressure method.

[0041] S11. Dissolve equal masses of four disperse dyes—Disperse Red 153 (CAS78564-87-1), Disperse Yellow 23 (CAS6250-23-3), Disperse Blue 60 (CAS12217-80-0), and Disperse Green (Disperse Yellow 23 and Disperse Blue 60 mixed in a 1:1 mass ratio)—in a dispersion consisting of 100 mL of water and 10 mL of Sunsolt 7000 (CAS65423-83-8) to obtain a dyeing solution; the total mass concentration of the disperse dyes in the dyeing solution is 2%.

[0042] S12. The polyester-cotton fabric was first cut into 8cm × 8cm samples. These samples were then immersed in a dyeing solution and continuously heated from 30°C to 130°C at a rate of 4°C / min in a high-temperature, high-pressure dyeing machine, with a pressure of 1.3 Pa, and held at 130°C for 30 minutes. The dyed polyester-cotton fabric was then boiled in water containing 2g / L NaOH and 2g / L Na₂S₂O₄ for 20 minutes to remove free dyes, polyester oligomers, and other impurities. Finally, it was washed with deionized water to obtain the dyed polyester-cotton fabric.

[0043] S2. The photosensitizer rose red is loaded onto cotton fibers via cyanuric chloride chemical grafting.

[0044] S21. The dyed polyester-cotton fabric sample was soaked in 1M NaOH for 1 hour to deprotonate the hydroxyl groups of the cotton yarn; then the alkalized fabric was immersed in a tetrahydrofuran solution of cyanuric chloride and reacted at 40°C for 12 hours. Then, the unreacted cyanuric chloride and other impurities were washed away with deionized water and tetrahydrofuran to obtain the activated dyed polyester-cotton fabric.

[0045] S22. The activated dyed polyester-cotton fabric is immersed in 80 mL of deionized water (DI) containing rose red (molar ratio of rose red to cyanuric chloride is 1:4) and reacted at 40 °C for 12 h. After the reaction is complete, the fabric is washed with water and dried at 40 °C to obtain multi-colored antibacterial polyester-cotton fabric.

[0046] Example 3

[0047] Reference Figure 1 As shown, the multi-color antibacterial polyester-cotton fabric and its preparation method of the present invention specifically include the following steps:

[0048] S1. Four traditional disperse dyes are loaded onto polyester fibers using a high-temperature, high-pressure method.

[0049] S11. Dissolve equal masses of four disperse dyes—Disperse Red 153 (CAS78564-87-1), Disperse Yellow 23 (CAS6250-23-3), Disperse Blue 60 (CAS12217-80-0), and Disperse Green (Disperse Yellow 23 and Disperse Blue 60 mixed in a 1:1 mass ratio)—in a dispersion consisting of 100 mL of water and 10 mL of Sunsolt 7000 (CAS65423-83-8) to obtain a dyeing solution; the total mass concentration of the disperse dyes in the dyeing solution is 2%.

[0050] S12. The polyester-cotton fabric was first cut into 8cm × 8cm samples. These samples were then immersed in a dyeing solution and continuously heated from 30°C to 130°C at a rate of 4°C / min in a high-temperature, high-pressure dyeing machine, with a pressure of 1.3 Pa, and held at 130°C for 30 minutes. The dyed polyester-cotton fabric was then boiled in water containing 2g / L NaOH and 2g / L Na₂S₂O₄ for 20 minutes to remove free dyes, polyester oligomers, and other impurities. Finally, it was washed with deionized water to obtain the dyed polyester-cotton fabric.

[0051] S2. Loading the photosensitizer methylene blue onto cotton fibers using a cyanuric chloride chemical grafting method.

[0052] S21. The dyed polyester-cotton fabric sample was soaked in 1M NaOH for 1 hour to deprotonate the hydroxyl groups of the cotton yarn; then the alkalized fabric was immersed in a tetrahydrofuran solution of cyanuric chloride and reacted at 40°C for 12 hours. Then, the unreacted cyanuric chloride and other impurities were washed away with deionized water and tetrahydrofuran to obtain the activated dyed polyester-cotton fabric.

[0053] S22. The activated dyed polyester-cotton fabric is immersed in 80 mL of methylene blue (methylene blue to cyanuric chloride molar ratio of 1:4) and deionized water (DI), and reacted at 40°C for 12 h. After the reaction is complete, the fabric is washed with water and dried at 40°C to obtain multi-colored antibacterial polyester-cotton fabric.

[0054] Test Example 1

[0055] The multi-color antibacterial polyester-cotton fabrics prepared in Examples 1-3 were subjected to bactericidal tests. The multi-color antibacterial polyester-cotton fabrics loaded with photosensitizers showed bactericidal activity under light conditions (65±5mW / cm²). 2 The worst bactericidal efficiency against Escherichia coli (400nm-700nm, 60min) was 99.58%, and the worst bactericidal efficiency against Staphylococcus aureus was 99.91%.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for preparing a multi-colored antibacterial polyester-cotton fabric, characterized in that, Includes the following steps, S1. Dissolve the disperse dye in a dispersion solution to obtain a dyeing solution. Immerse a polyester-cotton fabric in the dyeing solution and dye it using a high-temperature and high-pressure method to obtain dyed polyester-cotton fabric. The dispersion solution is obtained by mixing a dispersion solvent and water at a volume ratio of 1:9-11. The conditions for the high-temperature and high-pressure method are: temperature 125℃-135℃; pressure 1.2Pa-1.5Pa; time 30min-45min. S2. Immerse the dyed polyester-cotton fabric described in S1 into a cyanuric chloride solution to obtain an activated dyed polyester-cotton fabric. S3. Immerse the activated dyed polyester-cotton fabric described in S2 into a photosensitizer solution to obtain the multi-colored antibacterial polyester-cotton fabric; the photosensitizer is selected from one or more of Laureth violet, rose red and methylene blue.

2. The method for preparing multi-color antibacterial polyester-cotton fabric according to claim 1, characterized in that, In S1, the dispersing solvent is selected from Sunsolt 7000.

3. The method for preparing multi-color antibacterial polyester-cotton fabric according to claim 1, characterized in that, In S1, the mass concentration of the disperse dye in the dyeing solution is 1%-3%.

4. The method for preparing multi-color antibacterial polyester-cotton fabric according to claim 1, characterized in that, In S1, the disperse dye is selected from at least two of Disperse Red 153, Disperse Yellow 23, and Disperse Blue 60.

5. The method for preparing multi-color antibacterial polyester-cotton fabric according to claim 1, characterized in that, In S2 and S3, the molar ratio of cyanuric chloride to photosensitizer is 4-4.5:

1.

6. The method for preparing multi-color antibacterial polyester-cotton fabric according to claim 1, characterized in that, In S2 and S3, the reaction temperature is 35℃-45℃ and the time is 12h-14h.

7. The method for preparing multi-color antibacterial polyester-cotton fabric according to claim 1, characterized in that, The ratio of the fabric to the finishing solution is 1:30-50; the finishing solution is a dyeing solution, cyanuric chloride solution, or photosensitizer solution.

8. The multi-colored antibacterial polyester-cotton fabric prepared by the method according to any one of claims 1-7.

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