An antibacterial self-cleaning ultrafine suede-like fabric and its preparation method and application

Abstract

The present invention belongs to the technical field of functional fabrics, and provides an antibacterial self-cleaning ultra-fine fiber suede-like fabric, a preparation method thereof and an application. The method of the present invention comprises the following steps: impregnating the ultra-fine fiber suede-like fabric in a 2-methylimidazole solution; adding an antibacterial mixture to the 2-methylimidazole solution in which the ultra-fine fiber suede-like fabric is impregnated for reaction, and placing the ultra-fine fiber suede-like fabric loaded with Cu@ZIF-L nanomaterials above a hydrophobic finishing agent for deposition reaction to obtain an antibacterial self-cleaning ultra-fine fiber suede-like fabric. In the antibacterial self-cleaning ultra-fine fiber suede-like fabric of the present invention, the Cu@ZIF-L nanomaterials provide antibacterial effects, and the hydrophobic finishing agent provides self-cleaning functions; the Cu@ZIF-L nanomaterials can also increase the surface roughness of the ultra-fine fiber suede-like fabric, and then cooperate with the hydrophobic finishing agent to increase the hydrophobic effect on the fabric surface similar to the lotus leaf structure, achieving the purpose of self-cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of functional fabrics, and particularly to an antibacterial self-cleaning ultra-fine fiber suede-like fabric and its preparation method and application. Background Art

[0002] Ultra-fine fiber suede-like fabrics for vehicle interiors, such as headrests, neck pillows, and lumbar supports, are easily contaminated by body secretions such as sweat, sebum, and oil stains due to frequent contact with the bodies of drivers and passengers. These products are usually not washed or replaced frequently, and the enclosed space in the vehicle provides an ideal environment for the reproduction of harmful microorganisms. Bacteria can easily multiply in such conditions and may form biofilms on the fabric surface, posing a potential threat to the health of drivers and passengers. In addition, vehicle interior materials are also easily contaminated by beverages such as coffee and milk.

[0003] Therefore, it has become very urgent to develop ultra-fine fiber suede-like vehicle interior fabrics with antibacterial and self-cleaning functions to ensure the hygiene and health of the driving environment. Summary of the Invention

[0004] The purpose of the present invention is to provide an antibacterial self-cleaning ultra-fine fiber suede-like fabric and its preparation method and application in order to overcome the deficiencies of the prior art.

[0005] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0006] The present invention provides a preparation method of an antibacterial self-cleaning ultra-fine fiber suede-like fabric, comprising the following steps:

[0007] 1) Immerse the ultra-fine fiber suede-like fabric in a 2-methylimidazole solution;

[0008] 2) Add an antibacterial mixture to the 2-methylimidazole solution in which the ultra-fine fiber suede-like fabric is immersed and react to obtain an ultra-fine fiber suede-like fabric loaded with Cu@ZIF-L nanomaterials;

[0009] 3) Place the ultra-fine fiber suede-like fabric loaded with Cu@ZIF-L nanomaterials above a hydrophobic finishing agent and perform a deposition reaction to obtain an antibacterial self-cleaning ultra-fine fiber suede-like fabric.

[0010] Preferably, the ultra-fine fiber suede-like fabric is woven from island-in-sea type polyester microfibers.

[0011] Preferably, the concentration of the 2-methylimidazole solution in step 1) is 0.2 - 0.5 mol / L, and the immersion treatment time is 3 - 10 min.

[0012] Preferably, the antibacterial mixture in step 2) is a mixture of a zinc source and a copper source, the zinc source includes zinc acetate, zinc nitrate, or zinc chloride, and the copper source includes copper acetate, copper nitrate, or copper chloride;

[0013] In the antibacterial mixture, the concentration of the zinc source is 0.4 - 0.8 mol / L, and the concentration of the copper source is 0.1 - 0.2 mol / L.

[0014] Preferably, the volume ratio of the antibacterial mixture in step 2) to the 2-methylimidazole solution in step 1) is 1:5 - 10.

[0015] Preferably, the temperature of the reaction in step 2) is 20 - 30 °C, and the reaction time is 1 - 6 h.

[0016] Preferably, the hydrophobic finishing agent in step 3) includes one or more of organosilicon, organofluorine, hydrocarbon, and wax; the volume ratio of the hydrophobic finishing agent to the 2-methylimidazole solution is 1:200 - 2000.

[0017] Preferably, the temperature of the deposition reaction in step 3) is 60 - 80 °C, and the deposition reaction time is 2 - 4 h.

[0018] The present invention also provides an antibacterial self-cleaning ultra-fine fiber suede fabric prepared by the preparation method of the antibacterial self-cleaning ultra-fine fiber suede fabric, and the antibacterial self-cleaning ultra-fine fiber suede fabric contains an antibacterial component and a hydrophobic component.

[0019] The present invention also provides the application of the antibacterial self-cleaning ultra-fine fiber suede fabric in automotive interiors.

[0020] The beneficial effects of the present invention include the following points:

[0021] 1) The antibacterial self-cleaning ultra-fine fiber suede fabric of the present invention can effectively inhibit the growth of bacteria, reduce the formation of biofilms, and facilitate the cleaning of stains such as beverages. The antibacterial self-cleaning ultra-fine fiber suede fabric is applied to automotive interior materials, making it have good antibacterial and self-cleaning functions, thereby improving the in-vehicle hygiene conditions and ensuring the health and safety of drivers and passengers.

[0022] 2) In the antibacterial self-cleaning ultra-fine fiber suede fabric provided by the present invention, the Cu@ZIF-L nanomaterial provides antibacterial effects, and the hydrophobic finishing agent provides self-cleaning functions, endowing the ultra-fine fiber suede fabric with functionality; the Cu@ZIF-L nanomaterial can also increase the surface roughness of the ultra-fine fiber suede fabric, and then cooperate with the hydrophobic finishing agent to increase the hydrophobic effect on the fabric surface similar to the lotus leaf structure, achieving the purpose of self-cleaning. Description of the Drawings

[0023] Figure 1 Scanning electron microscope image of the surface of the antibacterial self-cleaning ultra-fine fiber suede fabric prepared in Example 1;

[0024] Figure 2Antibacterial graph of the antibacterial self-cleaning superfine suede fabric prepared in Example 1 and the untreated superfine suede fabric against Escherichia coli;

[0025] Figure 3 Contact angle graph of the antibacterial self-cleaning superfine suede fabric prepared in Example 1, Cu@ZIF-L-superfine suede fabric, and the untreated superfine suede fabric;

[0026] Figure 4 Static graph of water droplets on the surface of the antibacterial self-cleaning superfine suede fabric prepared in Example 1, Cu@ZIF-L-superfine suede fabric, and the untreated superfine suede fabric;

[0027] Figure 5 Self-cleaning experiment graph of the antibacterial self-cleaning superfine suede fabric prepared in Example 1;

[0028] Among them, the superfine suede fabric is the untreated superfine suede fabric, the MTMS / Cu@ZIF-L-superfine suede fabric is the antibacterial self-cleaning superfine suede fabric prepared in Example 1, and the Cu@ZIF-L-superfine suede fabric is the superfine suede fabric loaded with Cu@ZIF-L nanomaterials prepared in Example 1. Detailed implementation method

[0029] The present invention provides a preparation method of an antibacterial self-cleaning superfine suede-like fabric, comprising the following steps:

[0030] 1) Immerse the superfine suede-like fabric in a 2-methylimidazole solution;

[0031] 2) Add an antibacterial mixture to the 2-methylimidazole solution in which the superfine suede-like fabric is immersed for reaction to obtain a superfine suede-like fabric loaded with Cu@ZIF-L nanomaterials;

[0032] 3) Place the superfine suede-like fabric loaded with Cu@ZIF-L nanomaterials above the hydrophobic finishing agent for deposition reaction to obtain an antibacterial self-cleaning superfine suede-like fabric.

[0033] In the present invention, the superfine suede-like fabric is preferably woven from island-in-sea type polyester microfibers.

[0034] In the present invention, the concentration of the 2-methylimidazole solution in step 1) is preferably 0.2 - 0.5 mol / L, further preferably 0.3 - 0.4 mol / L, and more preferably 0.35 mol / L; the time of the immersion treatment is preferably 3 - 10 min, further preferably 4 - 8 min, and more preferably 5 - 6 min.

[0035] In the present invention, the antibacterial mixture in step 2) is preferably a mixture of a zinc source and a copper source. The zinc source preferably includes zinc acetate, zinc nitrate, or zinc chloride, and the copper source preferably includes copper acetate, copper nitrate, or copper chloride.

[0036] In the present invention, in the antibacterial mixture described in step 2), the concentration of the zinc source is preferably 0.4 - 0.8 mol / L, more preferably 0.5 - 0.7 mol / L, and still more preferably 0.6 mol / L; the concentration of the copper source is preferably 0.1 - 0.2 mol / L, more preferably 0.12 - 0.18 mol / L, and still more preferably 0.15 mol / L.

[0037] In the present invention, the volume ratio of the antibacterial mixture described in step 2) to the 2-methylimidazole solution described in step 1) is preferably 1:5 - 10, more preferably 1:6 - 9, and still more preferably 1:7 - 8.

[0038] In the present invention, the temperature of the reaction described in step 2) is preferably 20 - 30 °C, more preferably 22 - 28 °C, and still more preferably 24 - 25 °C; the reaction time is preferably 1 - 6 h, more preferably 2 - 5 h, and still more preferably 3 - 4 h.

[0039] In the present invention, it is preferred to drop the antibacterial mixture into the 2-methylimidazole solution impregnating the microfiber suede fabric, and the dropping speed is preferably 0.8 - 1.2 drops / s, more preferably 1 drop / s; the reaction is preferably carried out under stirring conditions, and the stirring speed is preferably 300 - 500 r / min, more preferably 350 - 450 r / min, and still more preferably 400 r / min.

[0040] In the present invention, after the reaction described in step 2) is completed, the microfiber suede fabric loaded with Cu@ZIF-L nanomaterials is successively washed and dried; the washing reagent is preferably anhydrous ethanol, and the drying temperature is preferably 65 - 75 °C, more preferably 68 - 72 °C, and still more preferably 70 °C.

[0041] In the present invention, the hydrophobic finishing agent described in step 3) preferably comprises one or more of organosilicon, organofluorine, hydrocarbon, and wax; the volume ratio of the hydrophobic finishing agent to the 2-methylimidazole solution is preferably 1:200 - 2000, more preferably 1:400 - 1500, and still more preferably 1:600 - 1000.

[0042] In the present invention, the temperature of the deposition reaction described in step 3) is preferably 60 - 80 °C, more preferably 65 - 75 °C, and still more preferably 70 °C, and the deposition reaction time is preferably 2 - 4 h, more preferably 2.5 - 3.5 h, and still more preferably 3 h.

[0043] In the present invention, the deposition reaction is preferably carried out in a vacuum environment, and the vacuum degree of the vacuum environment is preferably 0.08 - 0.12 MPa, more preferably 0.09 - 0.11 MPa, and still more preferably 0.1 MPa.

[0044] In the present invention, the purpose of the deposition reaction is to deposit the hydrophobic finishing agent on the surface of the microfiber suede.

[0045] The present invention also provides an antibacterial self-cleaning microfiber suede fabric prepared by the preparation method of the antibacterial self-cleaning microfiber suede fabric, and the antibacterial self-cleaning microfiber suede fabric contains an antibacterial component and a hydrophobic component.

[0046] The present invention also provides the application of the antibacterial self-cleaning microfiber suede fabric in automobile interiors.

[0047] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0048] Example 1

[0049] Dissolve 2-methylimidazole in deionized water and stir to dissolve to obtain a 2-methylimidazole solution with a concentration of 0.3 mol / L; dissolve zinc chloride and copper chloride in deionized water at the same time to obtain an antibacterial mixture. In the antibacterial mixture, the concentration of zinc chloride is 0.4 mol / L and the concentration of copper chloride is 0.1 mol / L.

[0050] Vertically place the microfiber suede velvet into 200 mL of the 2-methylimidazole solution, soak for 5 min, then dropwise add the antibacterial mixture (the volume ratio of the antibacterial mixture to the 2-methylimidazole solution is 1:8) at a rate of 1 drop / second, and stir and react at 25 °C at a speed of 400 r / min for 3 h. After the reaction is completed, take out the microfiber suede velvet, wash it clean with absolute ethanol, and dry it at 70 °C to obtain a microfiber suede velvet loaded with Cu@ZIF-L nanomaterials.

[0051] Place the microfiber suede velvet loaded with Cu@ZIF-L nanomaterials on the porcelain plate of the drying dish, place a small beaker under the porcelain plate, and add 500 μL of methyltrimethylsilane (the volume ratio of methyltrimethylsilane to the 2-methylimidazole solution is 1:400) into the beaker; then place the drying dish in a vacuum drying oven and heat and react at 70 °C and 0.1 MPa for 3 h. The hydrophobic finishing agent is deposited on the surface of the microfiber suede velvet, and an antibacterial self-cleaning microfiber suede velvet is obtained after the reaction is completed.

[0052] The scanning electron microscope image of the surface of the antibacterial self-cleaning microfiber suede velvet prepared in Example 1 is as Figure 1 shown, and it can be seen from Figure 1 that the surface of the microfiber suede velvet is covered with Cu@ZIF-L nanomaterials.

[0053] Taking Escherichia coli as the representative strain, the antibacterial self-cleaning superfine suede prepared in Example 1 was subjected to an antibacterial circle test. The antibacterial diagrams of the superfine suede prepared in Example 1 and the untreated superfine suede against Escherichia coli are as shown in Figure 2 As can be seen from Figure 2 , the antibacterial self-cleaning superfine suede has an obvious antibacterial circle, indicating that the superfine suede has good antibacterial properties.

[0054] The contact angles of the antibacterial self-cleaning superfine suede prepared in Example 1, Cu@ZIF-L-superfine suede, and untreated superfine suede were measured, and the results are as shown in Figure 3 As can be seen from Figure 3 , the antibacterial self-cleaning superfine suede prepared in Example 1 has good hydrophobicity.

[0055] Water droplets were dropped onto the surfaces of the antibacterial self-cleaning superfine suede prepared in Example 1, Cu@ZIF-L-superfine suede, and untreated superfine suede. The static diagrams of the water droplets on the surfaces are as shown in Figure 4 As can be seen from Figure 4 , the water droplets completely infiltrated the untreated superfine suede, while the water droplets could stably exist on the surface of the antibacterial self-cleaning superfine suede prepared in Example 1.

[0056] The self-cleaning test of the antibacterial self-cleaning superfine suede prepared in Example 1 was carried out, and the results are as shown in Figure 5 As can be seen from Figure 5 , the antibacterial self-cleaning superfine suede prepared in Example 1 has good self-cleaning performance.

[0057] Example 2

[0058] The concentration of copper chloride in the antibacterial mixture of Example 1 was changed to 0.2 mol / L, and other conditions were the same as those in Example 1.

[0059] Example 3

[0060] The concentration of copper chloride in the antibacterial mixture of Example 1 was changed to 0.2 mol / L, and the volume ratio of methyltrimethylsilane to 2-methylimidazole solution was changed to 1:500 (methyltrimethylsilane was 400 μL), and other conditions were the same as those in Example 1.

[0061] Example 4

[0062] 2-Methylimidazole was dissolved in deionized water and stirred to dissolve to obtain a 2-methylimidazole solution with a concentration of 0.2 mol / L; zinc nitrate and copper nitrate were simultaneously dissolved in deionized water to obtain an antibacterial mixture. In the antibacterial mixture, the concentration of zinc nitrate was 0.6 mol / L and the concentration of copper nitrate was 0.15 mol / L.

[0063] Vertically place the ultra-fine suede into a 2-methylimidazole solution, soak for 4 min, then slowly add dropwise an antibacterial mixture (the volume ratio of the antibacterial mixture to the 2-methylimidazole solution is 1:6), and stir and react at 22 °C for 5 h. After the reaction is completed, take out the ultra-fine suede, wash it clean with absolute ethanol, and dry it at 65 °C to obtain the ultra-fine suede loaded with Cu@ZIF-L nanomaterials.

[0064] Place the ultra-fine suede loaded with Cu@ZIF-L nanomaterials on the porcelain plate of a drying dish. Place a small beaker under the porcelain plate and add 500 μL of perfluorooctanesulfonic acid into the beaker. Then place the drying dish in a vacuum drying oven and heat and react at 65 °C for 3.5 h. The hydrophobic finishing agent is deposited on the surface of the ultra-fine suede, and the antibacterial self-cleaning ultra-fine suede is obtained after the reaction is completed.

[0065] Example 5

[0066] Dissolve 2-methylimidazole in deionized water and stir to dissolve to obtain a 2-methylimidazole solution with a concentration of 0.4 mol / L. Dissolve zinc acetate and copper acetate in deionized water at the same time to obtain an antibacterial mixture. In the antibacterial mixture, the concentration of zinc acetate is 0.5 mol / L and the concentration of copper acetate is 0.12 mol / L.

[0067] Vertically place the ultra-fine suede into the 2-methylimidazole solution, soak for 8 min, then slowly add dropwise the antibacterial mixture (the volume ratio of the antibacterial mixture to the 2-methylimidazole solution is 1:9), and stir and react at 28 °C for 2 h. After the reaction is completed, take out the ultra-fine suede, wash it clean with absolute ethanol, and dry it at 75 °C to obtain the ultra-fine suede loaded with Cu@ZIF-L nanomaterials.

[0068] Place the ultra-fine suede loaded with Cu@ZIF-L nanomaterials on the porcelain plate of a drying dish. Place a small beaker under the porcelain plate and add 500 μL of liquid paraffin into the beaker. Then place the drying dish in a vacuum drying oven and heat and react at 75 °C for 2.5 h. The hydrophobic finishing agent is deposited on the surface of the ultra-fine suede, and the antibacterial self-cleaning ultra-fine suede is obtained after the reaction is completed.

[0069] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for preparing an antibacterial self-cleaning microfiber suede-like fabric, characterized in that: The following steps are included: 1) The microfiber suede-like fabric is immersed in a 2-methylimidazole solution; 2) adding the antibacterial mixed solution to the 2-methylimidazole solution in which the microfiber suede-like fabric is impregnated to react, thereby obtaining the microfiber suede-like fabric loaded with Cu@ZIF-L nanomaterials; 3) placing the microfiber suede-like fabric loaded with Cu@ZIF-L nanomaterials on top of the hydrophobic finishing agent to perform a deposition reaction to obtain an antibacterial and self-cleaning microfiber suede-like fabric; Step 2) the antibacterial mixed solution is a mixed solution of a zinc source and a copper source, wherein the concentration of the zinc source is 0.4-0.8 mol / L, and the concentration of the copper source is 0.1-0.15 mol / L; Step 3) the hydrophobic finishing agent comprises one or more of organic silicon, organic fluorine, hydrocarbon and wax; the volume ratio of the hydrophobic finishing agent to the 2-methylimidazole solution is 1:200-2000; Step 3) The temperature of the deposition reaction is 60-80° C., and the deposition reaction time is 2-4 hours.

2. The method for preparing the antibacterial self-cleaning microfiber suede-like fabric according to claim 1, characterized in that: Microfiber suede fabric is woven from island-type polyester microfiber.

3. The method for preparing the antibacterial self-cleaning microfiber suede-like fabric according to claim 1, characterized in that: Step 1) The concentration of the 2-methylimidazole solution is 0.2-0.5 mol / L, and the immersion treatment time is 3-10 min.

4. The method for preparing the antibacterial self-cleaning microfiber suede-like fabric according to claim 1 or 3, characterized in that: The zinc source includes zinc acetate, zinc nitrate or zinc chloride, and the copper source includes copper acetate, copper nitrate or copper chloride.

5. The method for preparing the antibacterial self-cleaning microfiber suede-like fabric according to claim 4, characterized in that: The volume ratio of the antibacterial mixed solution in step 2) to the 2-methylimidazole solution in step 1) is 1:5-10.

6. The method for preparing the antibacterial self-cleaning microfiber suede-like fabric according to claim 5, characterized in that: Step 2) The reaction temperature is 20-30°C and the reaction time is 1-6h.

7. The antibacterial self-cleaning microfiber suede-like fabric prepared by the method for preparing the antibacterial self-cleaning microfiber suede-like fabric according to any one of claims 1 to 6, characterized in that: The antibacterial self-cleaning microfiber suede fabric contains antibacterial components and hydrophobic components.

8. Use of the antibacterial self-cleaning microfiber suede-like fabric according to claim 7 in automobile interior decoration.

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