Antibacterial self-cleaning microfiber suede fabric as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of functional fabrics, and provides an antibacterial self-cleaning microfiber suede fabric as well as a preparation method and application thereof. The method comprises the following steps: carrying out dipping treatment on the microfiber suede fabric in a 2-methylimidazole solution; and adding the antibacterial mixed solution into the 2-methylimidazole solution in which the microfiber suede fabric is impregnated for reaction, placing the microfiber suede fabric loaded with the Cu-coated ZIF-L nano material above the hydrophobic finishing agent, and performing deposition reaction to obtain the antibacterial self-cleaning microfiber suede fabric. In the antibacterial self-cleaning microfiber suede fabric provided by the invention, the Cu-coated ZIF-L nano material provides an antibacterial effect, and the hydrophobic finishing agent provides a self-cleaning function; the Cu-coated ZIF-L nano material can also increase the roughness of the surface of the microfiber suede fabric, then the Cu-coated ZIF-L nano material and the hydrophobic finishing agent have a synergistic effect, the hydrophobic effect of the surface of the fabric is improved through a lotus leaf-like structure, and the self-cleaning purpose is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of functional fabrics, and in particular to an antibacterial self-cleaning microfiber suede-like fabric and a preparation method and application thereof. Background Art

[0002] Microfiber suede fabrics used in car decoration, such as headrests, neck pillows and waist supports, are easily contaminated by body secretions such as sweat, sebum and oil due to frequent contact with the body of the driver and passengers. These products are usually not washed or replaced frequently, and the closed space inside the car provides an ideal environment for the reproduction of harmful microorganisms. Bacteria can easily multiply in large numbers under such conditions and may form biofilms on the surface of the fabric, posing a potential threat to the health of the driver and passengers. In addition, the materials inside the car are also easily contaminated by beverages such as coffee and milk.

[0003] Therefore, it is very urgent to develop microfiber suede-like car trim 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 microfiber suede-like fabric and a preparation method and application thereof in order to overcome the deficiencies of the prior art.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: The present invention provides a method for preparing an antibacterial self-cleaning microfiber suede-like fabric, comprising the following steps: 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) The microfiber suede-like fabric loaded with Cu@ZIF-L nanomaterials is placed on top of the hydrophobic finishing agent to carry out a deposition reaction to obtain an antibacterial and self-cleaning microfiber suede-like fabric.

[0006] Preferably, the microfiber suede-like fabric is woven from island-type polyester microfibers.

[0007] Preferably, in 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.

[0008] Preferably, the antibacterial mixed solution in step 2) is a mixed solution of a zinc source and a copper source, the zinc source comprises zinc acetate, zinc nitrate or zinc chloride, and the copper source comprises copper acetate, copper nitrate or copper chloride; In the antibacterial mixed solution, 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.

[0009] Preferably, the volume ratio of the antibacterial mixed solution in step 2) to the 2-methylimidazole solution in step 1) is 1:5-10.

[0010] Preferably, the reaction temperature in step 2) is 20-30° C., and the reaction time is 1-6 h.

[0011] Preferably, in step 3), the hydrophobic finishing agent comprises one or more of silicone, organic fluorine, hydrocarbon and wax; and the volume ratio of the hydrophobic finishing agent to the 2-methylimidazole solution is 1:200-2000.

[0012] Preferably, in step 3), the temperature of the deposition reaction is 60-80° C., and the deposition reaction time is 2-4 hours.

[0013] The present invention also provides an antibacterial self-cleaning microfiber suede-like fabric prepared by the preparation method of the antibacterial self-cleaning microfiber suede-like fabric. The antibacterial self-cleaning microfiber suede-like fabric comprises an antibacterial component and a hydrophobic component.

[0014] The present invention also provides application of the antibacterial self-cleaning microfiber suede-like fabric in automobile interior decoration.

[0015] The beneficial effects of the present invention include the following: 1) The antibacterial self-cleaning microfiber suede-like fabric of the present invention can effectively inhibit bacterial growth, reduce the formation of biofilm, and facilitate the cleaning of stains such as beverages. The antibacterial self-cleaning microfiber suede-like fabric is applied to automobile interior materials, so that it has good antibacterial and self-cleaning functions, thereby improving the sanitary conditions in the car and ensuring the health and safety of drivers and passengers.

[0016] 2) In the antibacterial and self-cleaning microfiber suede-like fabric provided by the present invention, the Cu@ZIF-L nanomaterial provides an antibacterial effect, and the hydrophobic finishing agent provides a self-cleaning function, thereby giving the microfiber suede-like fabric functionality; the Cu@ZIF-L nanomaterial can also increase the roughness of the surface of the microfiber suede-like fabric, and then synergize with the hydrophobic finishing agent to increase the hydrophobic effect of the fabric surface similar to the lotus leaf structure, thereby achieving the purpose of self-cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a scanning electron microscope image of the surface of the antibacterial self-cleaning microfiber suede prepared in Example 1; Figure 2 This is the antibacterial graph of the antibacterial self-cleaning microfiber suede prepared in Example 1 and the untreated microfiber suede against Escherichia coli; Figure 3The contact angle diagrams of the antibacterial self-cleaning microfiber suede, Cu@ZIF-L-microfiber suede, and untreated microfiber suede prepared in Example 1; Figure 4 The static images of water droplets on the surface of the antibacterial self-cleaning microfiber suede, Cu@ZIF-L-microfiber suede, and untreated microfiber suede prepared in Example 1; Figure 5 This is a self-cleaning experiment diagram of the antibacterial self-cleaning microfiber suede prepared in Example 1; Among them, the microfiber suede is untreated microfiber suede, the MTMS / Cu@ZIF-L-microfiber suede is the antibacterial self-cleaning microfiber suede prepared in Example 1, and the Cu@ZIF-L-microfiber suede is the microfiber suede loaded with Cu@ZIF-L nanomaterials prepared in Example 1. DETAILED DESCRIPTION

[0018] The present invention provides a method for preparing an antibacterial self-cleaning microfiber suede-like fabric, comprising the following steps: 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) The microfiber suede-like fabric loaded with Cu@ZIF-L nanomaterials is placed on top of the hydrophobic finishing agent to carry out a deposition reaction to obtain an antibacterial and self-cleaning microfiber suede-like fabric.

[0019] In the present invention, the microfiber suede-like fabric is preferably woven from island-shaped polyester microfibers.

[0020] In the present invention, the concentration of the 2-methylimidazole solution in step 1) is preferably 0.2-0.5 mol / L, more 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, more preferably 4-8 min, and more preferably 5-6 min.

[0021] In the present invention, the antibacterial mixed solution in step 2) is preferably a mixed solution of a zinc source and a copper source, the zinc source preferably comprises zinc acetate, zinc nitrate or zinc chloride, and the copper source preferably comprises copper acetate, copper nitrate or copper chloride.

[0022] In the present invention, in the antibacterial mixed solution of step 2), the concentration of the zinc source is preferably 0.4-0.8 mol / L, more preferably 0.5-0.7 mol / L, more preferably 0.6 mol / L, and the concentration of the copper source is preferably 0.1-0.2 mol / L, more preferably 0.12-0.18 mol / L, more preferably 0.15 mol / L.

[0023] In the present invention, the volume ratio of the antibacterial mixed solution in step 2) to the 2-methylimidazole solution in step 1) is preferably 1:5-10, more preferably 1:6-9, and even more preferably 1:7-8.

[0024] In the present invention, the reaction temperature in step 2) is preferably 20-30°C, more preferably 22-28°C, and more preferably 24-25°C; the reaction time is preferably 1-6h, more preferably 2-5h, and more preferably 3-4h.

[0025] In the present invention, the antibacterial mixed liquid is preferably added dropwise to the 2-methylimidazole solution impregnated with the microfiber suede-like fabric, and the dropping speed is preferably 0.8 to 1.2 drops / s, and more preferably 1 drop / s; the reaction is preferably carried out under stirring conditions, and the stirring speed is preferably 300 to 500 r / min, more preferably 350 to 450 r / min, and more preferably 400 r / min.

[0026] In the present invention, after the reaction in step 2) is completed, the microfiber suede loaded with Cu@ZIF-L nanomaterial is washed and dried in sequence; the washing reagent is preferably anhydrous ethanol, and the drying temperature is preferably 65-75°C, more preferably 68-72°C, and more preferably 70°C.

[0027] In the present invention, the hydrophobic finishing agent in step 3) preferably comprises one or more of silicone, organic fluorine, 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 more preferably 1:600-1000.

[0028] In the present invention, the temperature of the deposition reaction in step 3) is preferably 60-80°C, more preferably 65-75°C, more preferably 70°C, and the deposition reaction time is preferably 2-4h, more preferably 2.5-3.5h, more preferably 3h.

[0029] 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 to 0.12 MPa, more preferably 0.09 to 0.11 MPa, and more preferably 0.1 MPa.

[0030] In the present invention, the purpose of the deposition reaction is to deposit the hydrophobic finishing agent on the surface of the microfiber suede.

[0031] The present invention also provides an antibacterial self-cleaning microfiber suede-like fabric prepared by the preparation method of the antibacterial self-cleaning microfiber suede-like fabric. The antibacterial self-cleaning microfiber suede-like fabric comprises an antibacterial component and a hydrophobic component.

[0032] The present invention also provides application of the antibacterial self-cleaning microfiber suede-like fabric in automobile interior decoration.

[0033] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0034] Example 1

[0035] Dissolve 2-methylimidazole in deionized water, stir and 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 mixed solution, in which the concentration of zinc chloride is 0.4 mol / L and the concentration of copper chloride is 0.1 mol / L.

[0036] The microfiber suede was placed vertically in 200 mL of 2-methylimidazole solution and soaked for 5 minutes, then the antibacterial mixture was added at a rate of 1 drop / second (the volume ratio of the antibacterial mixture to the 2-methylimidazole solution was 1:8), and stirred at 400 r / min for 3 hours at 25°C. After the reaction, the microfiber suede was taken out and cleaned with anhydrous ethanol, and then dried at 70°C to obtain the microfiber suede loaded with Cu@ZIF-L nanomaterials.

[0037] The microfiber suede loaded with Cu@ZIF-L nanomaterials was placed on a porcelain plate in a drying dish. A small beaker was placed under the porcelain plate. 500µL of methyltrimethylsilane (the volume ratio of methyltrimethylsilane and 2-methylimidazole solution was 1:400) was added to the beaker. The drying dish was then placed in a vacuum drying oven and heated at 70°C and 0.1MPa for 3 hours. The hydrophobic finishing agent was deposited on the surface of the microfiber suede. After the reaction, antibacterial and self-cleaning microfiber suede was obtained.

[0038] The scanning electron microscope image of the surface of the antibacterial self-cleaning microfiber suede prepared in Example 1 is as follows: Figure 1 As shown by Figure 1 It can be seen that the surface of the microfiber suede is covered with Cu@ZIF-L nanomaterials.

[0039] Taking Escherichia coli as a representative bacterial species, the antibacterial self-cleaning microfiber suede prepared in Example 1 was subjected to an inhibition zone experiment. The antibacterial effects of the microfiber suede prepared in Example 1 and the untreated microfiber suede on Escherichia coli are shown in the figure below. Figure 2 As shown by Figure 2 It can be seen that the antibacterial self-cleaning microfiber suede has an obvious antibacterial zone, which shows that the microfiber suede has good antibacterial properties.

[0040] The antibacterial self-cleaning microfiber suede prepared in Example 1, Cu@ZIF-L-microfiber suede, and untreated microfiber suede were tested for contact angle. The results are as follows: Figure 3 As shown by Figure 3 It can be seen that the antibacterial self-cleaning microfiber suede prepared in Example 1 has good hydrophobicity.

[0041] Water drops were dropped onto the surfaces of the antibacterial self-cleaning microfiber suede, Cu@ZIF-L-microfiber suede, and untreated microfiber suede prepared in Example 1. The static image of the surface water drops was as follows: Figure 4 As shown by Figure 4 It can be seen that the water droplets completely infiltrate the untreated microfiber suede, while the water droplets can stably exist on the surface of the antibacterial self-cleaning microfiber suede prepared in Example 1.

[0042] The antibacterial self-cleaning microfiber suede prepared in Example 1 was subjected to a self-cleaning test, and the results are as follows: Figure 5 As shown by Figure 5 It can be seen that the antibacterial self-cleaning microfiber suede prepared in Example 1 has good self-cleaning performance.

[0043] Example 2

[0044] The concentration of copper chloride in the antibacterial mixed solution of Example 1 was changed to 0.2 mol / L, and the other conditions were the same as those of Example 1.

[0045] Example 3

[0046] The concentration of copper chloride in the antibacterial mixed solution of Example 1 was changed to 0.2 mol / L, the volume ratio of methyltrimethylsilane and 2-methylimidazole solution was changed to 1:500 (methyltrimethylsilane was 400 μL), and the other conditions were the same as in Example 1.

[0047] Example 4

[0048] Dissolve 2-methylimidazole in deionized water, stir and dissolve to obtain a 2-methylimidazole solution with a concentration of 0.2 mol / L; dissolve zinc nitrate and copper nitrate in deionized water at the same time to obtain an antibacterial mixed solution, in which the concentration of zinc nitrate is 0.6 mol / L and the concentration of copper nitrate is 0.15 mol / L.

[0049] The microfiber suede was placed vertically in the 2-methylimidazole solution and soaked for 4 minutes, and then the antibacterial mixture was slowly added (the volume ratio of the antibacterial mixture to the 2-methylimidazole solution was 1:6), and stirred at 22°C for 5 hours. After the reaction, the microfiber suede was taken out and cleaned with anhydrous ethanol, and then dried at 65°C to obtain the microfiber suede loaded with Cu@ZIF-L nanomaterials.

[0050] The microfiber suede loaded with Cu@ZIF-L nanomaterials is placed on a porcelain plate in a drying dish, a small beaker is placed under the porcelain plate, and 500µL of perfluorooctane sulfonic acid is added to the beaker; then the drying dish is placed in a vacuum drying oven and heated at 65°C for 3.5 hours. The hydrophobic finishing agent is deposited on the surface of the microfiber suede, and antibacterial and self-cleaning microfiber suede is obtained after the reaction.

[0051] Example 5

[0052] Dissolve 2-methylimidazole in deionized water, stir and 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 mixed solution, in which the concentration of zinc acetate is 0.5 mol / L and the concentration of copper acetate is 0.12 mol / L.

[0053] The microfiber suede was placed vertically in the 2-methylimidazole solution and soaked for 8 minutes, and then the antibacterial mixture was slowly added (the volume ratio of the antibacterial mixture to the 2-methylimidazole solution was 1:9), and stirred at 28°C for 2 hours. After the reaction, the microfiber suede was taken out and cleaned with anhydrous ethanol, and then dried at 75°C to obtain the microfiber suede loaded with Cu@ZIF-L nanomaterials.

[0054] The microfiber suede loaded with Cu@ZIF-L nanomaterials was placed on a porcelain plate in a drying dish, a small beaker was placed under the porcelain plate, and 500µL of liquid paraffin was added to the beaker; then the drying dish was placed in a vacuum drying oven and heated at 75°C for 2.5 hours. The hydrophobic finishing agent was deposited on the surface of the microfiber suede, and antibacterial and self-cleaning microfiber suede was obtained after the reaction.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection 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) The microfiber suede-like fabric loaded with Cu@ZIF-L nanomaterials is placed on top of the hydrophobic finishing agent to carry out a deposition reaction to obtain an antibacterial and self-cleaning microfiber suede-like fabric.

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: Step 2) the antibacterial mixed solution is a mixed solution of a zinc source and a copper source, the zinc source comprises zinc acetate, zinc nitrate or zinc chloride, and the copper source comprises copper acetate, copper nitrate or copper chloride; In the antibacterial mixed solution, 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.

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 method for preparing the antibacterial self-cleaning microfiber suede-like fabric according to claim 6, characterized in that: 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.

8. The method for preparing the antibacterial self-cleaning microfiber suede-like fabric according to claim 7, characterized in that: Step 3) The temperature of the deposition reaction is 60-80° C., and the deposition reaction time is 2-4 hours.

9. 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 8, characterized in that: The antibacterial self-cleaning microfiber suede fabric contains antibacterial components and hydrophobic components.

10. Use of the antibacterial self-cleaning microfiber suede-like fabric according to claim 9 in automobile interior decoration.

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